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overflow: hidden; text-overflow: ellipsis; -webkit-line-clamp: 3; -webkit-box-orient: vertical; }</style><div class="col-xs-12 clearfix"><div class="u-floatLeft"><h1 class="PageHeader-title u-m0x u-fs30">Laser Doppler Vibrometer</h1><div class="u-tcGrayDark">34 Followers</div><div class="u-tcGrayDark u-mt2x">Recent papers in <b>Laser Doppler Vibrometer</b></div></div></div></div></div></div><div class="TabbedNavigation"><div class="container"><div class="row"><div class="col-xs-12 clearfix"><ul class="nav u-m0x u-p0x list-inline u-displayFlex"><li class="active"><a href="https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer">Top Papers</a></li><li><a href="https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer/MostCited">Most Cited Papers</a></li><li><a href="https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer/MostDownloaded">Most Downloaded Papers</a></li><li><a href="https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer/MostRecent">Newest Papers</a></li><li><a class="" href="https://www.academia.edu/People/Laser_Doppler_Vibrometer">People</a></li></ul></div><style type="text/css">ul.nav{flex-direction:row}@media(max-width: 567px){ul.nav{flex-direction:column}.TabbedNavigation li{max-width:100%}.TabbedNavigation li.active{background-color:var(--background-grey, #dddde2)}.TabbedNavigation li.active:before,.TabbedNavigation li.active:after{display:none}}</style></div></div></div><div class="container"><div class="row"><div class="col-xs-12"><div class="u-displayFlex"><div class="u-flexGrow1"><div class="works"><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_24889509" data-work_id="24889509" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/24889509/Non_destructive_determination_of_the_optimum_eating_ripeness_of_pears_and_their_texture_measurements_using_acoustical_vibration_techniques">Non-destructive determination of the optimum eating ripeness of pears and their texture measurements using acoustical vibration techniques</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">We investigated the time-course changes in the elasticity index (EI) and the texture index (TI) 2 of pears (Pyrus communis L.), namely, 'La France' during the postharvest period. EI was 3 determined using a formula EI = f 2 2 ·m 2/3 ,... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_24889509" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">We investigated the time-course changes in the elasticity index (EI) and the texture index (TI) 2 of pears (Pyrus communis L.), namely, 'La France' during the postharvest period. EI was 3 determined using a formula EI = f 2 2 ·m 2/3 , where f 2 is the pear sample's second resonance 4 frequency and m is the sample mass. A nondestructive vibrational method using a laser Doppler 5 vibrometer (LDV) was used for measuring the pear samples' second resonance frequency (f 2 ).</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/24889509" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="cd0901a65a31a2fab5a34674be31e152" rel="nofollow" data-download="{"attachment_id":45209279,"asset_id":24889509,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/45209279/download_file?st=MTc0MDg3MDkxOSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="47979476" href="https://independent.academia.edu/NaokiSakurai">Naoki Sakurai</a><script data-card-contents-for-user="47979476" type="text/json">{"id":47979476,"first_name":"Naoki","last_name":"Sakurai","domain_name":"independent","page_name":"NaokiSakurai","display_name":"Naoki Sakurai","profile_url":"https://independent.academia.edu/NaokiSakurai?f_ri=1010378","photo":"/images/s65_no_pic.png"}</script></span></span></li><li class="js-paper-rank-work_24889509 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="24889509"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 24889509, container: ".js-paper-rank-work_24889509", }); 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$(".js-view-count[data-work-id=24889509]").text(description); $(".js-view-count-work_24889509").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_24889509").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="24889509"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">15</a>  </div><span class="InlineList-item-text u-textTruncate u-pl10x"><a class="InlineList-item-text" data-has-card-for-ri="23077" rel="nofollow" href="https://www.academia.edu/Documents/in/Vibration">Vibration</a>, <script data-card-contents-for-ri="23077" type="text/json">{"id":23077,"name":"Vibration","url":"https://www.academia.edu/Documents/in/Vibration?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="39718" rel="nofollow" href="https://www.academia.edu/Documents/in/Food_Preservation">Food Preservation</a>, <script data-card-contents-for-ri="39718" type="text/json">{"id":39718,"name":"Food Preservation","url":"https://www.academia.edu/Documents/in/Food_Preservation?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="51166" rel="nofollow" href="https://www.academia.edu/Documents/in/Nondestructive_testing">Nondestructive testing</a>, <script data-card-contents-for-ri="51166" type="text/json">{"id":51166,"name":"Nondestructive testing","url":"https://www.academia.edu/Documents/in/Nondestructive_testing?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="225187" rel="nofollow" href="https://www.academia.edu/Documents/in/Postharvest_Biology_and_Technology">Postharvest Biology and Technology</a><script data-card-contents-for-ri="225187" type="text/json">{"id":225187,"name":"Postharvest Biology and Technology","url":"https://www.academia.edu/Documents/in/Postharvest_Biology_and_Technology?f_ri=1010378","nofollow":true}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=24889509]'), work: {"id":24889509,"title":"Non-destructive determination of the optimum eating ripeness of pears and their texture measurements using acoustical vibration techniques","created_at":"2016-04-29T14:48:32.910-07:00","url":"https://www.academia.edu/24889509/Non_destructive_determination_of_the_optimum_eating_ripeness_of_pears_and_their_texture_measurements_using_acoustical_vibration_techniques?f_ri=1010378","dom_id":"work_24889509","summary":"We investigated the time-course changes in the elasticity index (EI) and the texture index (TI) 2 of pears (Pyrus communis L.), namely, 'La France' during the postharvest period. EI was 3 determined using a formula EI = f 2 2 ·m 2/3 , where f 2 is the pear sample's second resonance 4 frequency and m is the sample mass. A nondestructive vibrational method using a laser Doppler 5 vibrometer (LDV) was used for measuring the pear samples' second resonance frequency (f 2 ).","downloadable_attachments":[{"id":45209279,"asset_id":24889509,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":47979476,"first_name":"Naoki","last_name":"Sakurai","domain_name":"independent","page_name":"NaokiSakurai","display_name":"Naoki Sakurai","profile_url":"https://independent.academia.edu/NaokiSakurai?f_ri=1010378","photo":"/images/s65_no_pic.png"}],"research_interests":[{"id":23077,"name":"Vibration","url":"https://www.academia.edu/Documents/in/Vibration?f_ri=1010378","nofollow":true},{"id":39718,"name":"Food Preservation","url":"https://www.academia.edu/Documents/in/Food_Preservation?f_ri=1010378","nofollow":true},{"id":51166,"name":"Nondestructive testing","url":"https://www.academia.edu/Documents/in/Nondestructive_testing?f_ri=1010378","nofollow":true},{"id":225187,"name":"Postharvest Biology and Technology","url":"https://www.academia.edu/Documents/in/Postharvest_Biology_and_Technology?f_ri=1010378","nofollow":true},{"id":226081,"name":"Texture","url":"https://www.academia.edu/Documents/in/Texture?f_ri=1010378"},{"id":234205,"name":"Sensory Evaluation","url":"https://www.academia.edu/Documents/in/Sensory_Evaluation?f_ri=1010378"},{"id":341079,"name":"Storage","url":"https://www.academia.edu/Documents/in/Storage?f_ri=1010378"},{"id":403452,"name":"Warehousing","url":"https://www.academia.edu/Documents/in/Warehousing?f_ri=1010378"},{"id":581211,"name":"Maturity","url":"https://www.academia.edu/Documents/in/Maturity?f_ri=1010378"},{"id":749302,"name":"Indexation","url":"https://www.academia.edu/Documents/in/Indexation?f_ri=1010378"},{"id":819138,"name":"Fruit Ripening","url":"https://www.academia.edu/Documents/in/Fruit_Ripening?f_ri=1010378"},{"id":1000014,"name":"Ripening","url":"https://www.academia.edu/Documents/in/Ripening?f_ri=1010378"},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378"},{"id":1315979,"name":"Time Course","url":"https://www.academia.edu/Documents/in/Time_Course?f_ri=1010378"},{"id":2168952,"name":"Resonant Frequency","url":"https://www.academia.edu/Documents/in/Resonant_Frequency?f_ri=1010378"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_24445761" data-work_id="24445761" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/24445761/Self_sensing_actuation_for_nanopositioning_and_active_mode_damping_in_dual_stage_HDDs">Self-sensing actuation for nanopositioning and active-mode damping in dual-stage HDDs</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">Position sensors other than the R/W heads are not embedded into current hard-disk drives (HDDs) due to cost, resolution, and signal-to-noise ratio (SNR) issues. Moreover, the "optimal" location for placing these sensors is still unknown.... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_24445761" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">Position sensors other than the R/W heads are not embedded into current hard-disk drives (HDDs) due to cost, resolution, and signal-to-noise ratio (SNR) issues. Moreover, the "optimal" location for placing these sensors is still unknown. In this paper, the Pb-Zr-Ti (PZT) elements in the PZT suspension-based microactuator are used as a secondary actuator and a displacement sensor simultaneously with self-sensing actuation. The proposed displacement estimation circuit produces an estimated PZT microactuator's displacement with high SNR and nanometer resolution comparable to that measured from the laser doppler vibrometer (LDV). A robust active mode damping controller is then designed to damp the PZT microactuator suspension's torsion modes and sway mode, as well as decoupling the HDD dual-stage servo into two distinct loops for individual sensitivity optimization. Our results show attenuation of PZT microactuator's suspension modes by 5 dB and sway mode by 30 dB with low sensitivity. A reduction of up to 20% in 3σ position error signal is also observed.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/24445761" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="c628a9eea50807e57ce6976711630989" rel="nofollow" data-download="{"attachment_id":44776666,"asset_id":24445761,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/44776666/download_file?st=MTc0MDg3MDkxOSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="47028835" href="https://independent.academia.edu/GuoxiaoGuo">Guoxiao Guo</a><script data-card-contents-for-user="47028835" type="text/json">{"id":47028835,"first_name":"Guoxiao","last_name":"Guo","domain_name":"independent","page_name":"GuoxiaoGuo","display_name":"Guoxiao Guo","profile_url":"https://independent.academia.edu/GuoxiaoGuo?f_ri=1010378","photo":"/images/s65_no_pic.png"}</script></span></span></li><li class="js-paper-rank-work_24445761 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="24445761"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 24445761, container: ".js-paper-rank-work_24445761", }); 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$(".js-view-count[data-work-id=24445761]").text(description); $(".js-view-count-work_24445761").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_24445761").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="24445761"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">7</a>  </div><span class="InlineList-item-text u-textTruncate u-pl9x"><a class="InlineList-item-text" data-has-card-for-ri="60" rel="nofollow" href="https://www.academia.edu/Documents/in/Mechanical_Engineering">Mechanical Engineering</a>, <script data-card-contents-for-ri="60" type="text/json">{"id":60,"name":"Mechanical Engineering","url":"https://www.academia.edu/Documents/in/Mechanical_Engineering?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="96825" rel="nofollow" href="https://www.academia.edu/Documents/in/Manufacturing_Engineering">Manufacturing Engineering</a>, <script data-card-contents-for-ri="96825" type="text/json">{"id":96825,"name":"Manufacturing Engineering","url":"https://www.academia.edu/Documents/in/Manufacturing_Engineering?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="991311" rel="nofollow" href="https://www.academia.edu/Documents/in/Signal_to_Noise_Ratio">Signal to Noise Ratio</a>, <script data-card-contents-for-ri="991311" type="text/json">{"id":991311,"name":"Signal to Noise Ratio","url":"https://www.academia.edu/Documents/in/Signal_to_Noise_Ratio?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="1010378" rel="nofollow" href="https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer">Laser Doppler Vibrometer</a><script data-card-contents-for-ri="1010378" type="text/json">{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378","nofollow":true}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=24445761]'), work: {"id":24445761,"title":"Self-sensing actuation for nanopositioning and active-mode damping in dual-stage HDDs","created_at":"2016-04-15T17:57:48.219-07:00","url":"https://www.academia.edu/24445761/Self_sensing_actuation_for_nanopositioning_and_active_mode_damping_in_dual_stage_HDDs?f_ri=1010378","dom_id":"work_24445761","summary":"Position sensors other than the R/W heads are not embedded into current hard-disk drives (HDDs) due to cost, resolution, and signal-to-noise ratio (SNR) issues. Moreover, the \"optimal\" location for placing these sensors is still unknown. In this paper, the Pb-Zr-Ti (PZT) elements in the PZT suspension-based microactuator are used as a secondary actuator and a displacement sensor simultaneously with self-sensing actuation. The proposed displacement estimation circuit produces an estimated PZT microactuator's displacement with high SNR and nanometer resolution comparable to that measured from the laser doppler vibrometer (LDV). A robust active mode damping controller is then designed to damp the PZT microactuator suspension's torsion modes and sway mode, as well as decoupling the HDD dual-stage servo into two distinct loops for individual sensitivity optimization. Our results show attenuation of PZT microactuator's suspension modes by 5 dB and sway mode by 30 dB with low sensitivity. A reduction of up to 20% in 3σ position error signal is also observed.","downloadable_attachments":[{"id":44776666,"asset_id":24445761,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":47028835,"first_name":"Guoxiao","last_name":"Guo","domain_name":"independent","page_name":"GuoxiaoGuo","display_name":"Guoxiao Guo","profile_url":"https://independent.academia.edu/GuoxiaoGuo?f_ri=1010378","photo":"/images/s65_no_pic.png"}],"research_interests":[{"id":60,"name":"Mechanical Engineering","url":"https://www.academia.edu/Documents/in/Mechanical_Engineering?f_ri=1010378","nofollow":true},{"id":96825,"name":"Manufacturing Engineering","url":"https://www.academia.edu/Documents/in/Manufacturing_Engineering?f_ri=1010378","nofollow":true},{"id":991311,"name":"Signal to Noise Ratio","url":"https://www.academia.edu/Documents/in/Signal_to_Noise_Ratio?f_ri=1010378","nofollow":true},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378","nofollow":true},{"id":1237788,"name":"Electrical And Electronic Engineering","url":"https://www.academia.edu/Documents/in/Electrical_And_Electronic_Engineering?f_ri=1010378"},{"id":1360090,"name":"Hard Disk Drive","url":"https://www.academia.edu/Documents/in/Hard_Disk_Drive?f_ri=1010378"},{"id":2124420,"name":"Optimal location","url":"https://www.academia.edu/Documents/in/Optimal_location?f_ri=1010378"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_45122496" data-work_id="45122496" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/45122496/EVALUACI%C3%93N_DE_VIBROMETR%C3%8DA_LASER_COMO_HERRAMIENTA_DE_IDENTIFICACI%C3%93N_DE_CAMBIOS_MICROESTRUCTURALES_EN_ACEROS_DP">EVALUACIÓN DE VIBROMETRÍA LASER COMO HERRAMIENTA DE IDENTIFICACIÓN DE CAMBIOS MICROESTRUCTURALES EN ACEROS DP</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">La gran demanda del mercado automotriz ha propiciado a las industrias manufactureras a transformar los materiales, en este caso, los aceros, para mejorar sus propiedades mecánicas. Al verse modificadas, estas propiedades tienen que ser... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_45122496" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">La gran demanda del mercado automotriz ha propiciado a las industrias<br />manufactureras a transformar los materiales, en este caso, los aceros, para mejorar sus propiedades mecánicas. Al verse modificadas, estas propiedades tienen que ser determinadas por métodos destructivos, los cuales son costosos y generan perdidas de material en desechos. La presente investigación ostenta teóricamente un método no destructivo empleando el martillo de impacto para generar vibraciones en las placas de acero. Las lecturas son obtenidas utilizando la vibrometría laser Doppler la cual busca identificar cambios en la microestructura de los aceros. No se obtienen resultados prácticos, debido a la contingencia del Covid-19, por lo cual solo se presenta un método teórico y las bases de la metodología que podrá seguirse una vez que se incorpore un nuevo estudiante a este proyecto.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/45122496" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="6cf9741f9e98679ffce9b9b017d26cf3" rel="nofollow" data-download="{"attachment_id":65690300,"asset_id":45122496,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/65690300/download_file?st=MTc0MDg3MDkxOSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="26750521" href="https://independent.academia.edu/CarlosMartinez160">Carlos Martinez</a><script data-card-contents-for-user="26750521" type="text/json">{"id":26750521,"first_name":"Carlos","last_name":"Martinez","domain_name":"independent","page_name":"CarlosMartinez160","display_name":"Carlos Martinez","profile_url":"https://independent.academia.edu/CarlosMartinez160?f_ri=1010378","photo":"/images/s65_no_pic.png"}</script></span></span></li><li class="js-paper-rank-work_45122496 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="45122496"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 45122496, container: ".js-paper-rank-work_45122496", }); });</script></li><li class="js-percentile-work_45122496 InlineList-item InlineList-item--bordered hidden u-tcGrayDark"><span class="percentile-widget hidden"><span class="u-mr2x percentile-widget" style="display: none">•</span><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 45122496; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-percentile-work_45122496"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></li><li class="js-view-count-work_45122496 InlineList-item InlineList-item--bordered hidden"><div><span><span class="js-view-count view-count u-mr2x" data-work-id="45122496"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 45122496; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=45122496]").text(description); $(".js-view-count-work_45122496").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_45122496").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="45122496"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">4</a>  </div><span class="InlineList-item-text u-textTruncate u-pl9x"><a class="InlineList-item-text" data-has-card-for-ri="41009" rel="nofollow" href="https://www.academia.edu/Documents/in/Non_Destructive_Testing">Non Destructive Testing</a>, <script data-card-contents-for-ri="41009" type="text/json">{"id":41009,"name":"Non Destructive Testing","url":"https://www.academia.edu/Documents/in/Non_Destructive_Testing?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="93023" rel="nofollow" href="https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometry">Laser Doppler Vibrometry</a>, <script data-card-contents-for-ri="93023" type="text/json">{"id":93023,"name":"Laser Doppler Vibrometry","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometry?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="793619" rel="nofollow" href="https://www.academia.edu/Documents/in/DP_Steel">DP Steel</a>, <script data-card-contents-for-ri="793619" type="text/json">{"id":793619,"name":"DP Steel","url":"https://www.academia.edu/Documents/in/DP_Steel?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="1010378" rel="nofollow" href="https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer">Laser Doppler Vibrometer</a><script data-card-contents-for-ri="1010378" type="text/json">{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378","nofollow":true}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=45122496]'), work: {"id":45122496,"title":"EVALUACIÓN DE VIBROMETRÍA LASER COMO HERRAMIENTA DE IDENTIFICACIÓN DE CAMBIOS MICROESTRUCTURALES EN ACEROS DP","created_at":"2021-02-14T22:23:40.588-08:00","url":"https://www.academia.edu/45122496/EVALUACI%C3%93N_DE_VIBROMETR%C3%8DA_LASER_COMO_HERRAMIENTA_DE_IDENTIFICACI%C3%93N_DE_CAMBIOS_MICROESTRUCTURALES_EN_ACEROS_DP?f_ri=1010378","dom_id":"work_45122496","summary":"La gran demanda del mercado automotriz ha propiciado a las industrias\nmanufactureras a transformar los materiales, en este caso, los aceros, para mejorar sus propiedades mecánicas. Al verse modificadas, estas propiedades tienen que ser determinadas por métodos destructivos, los cuales son costosos y generan perdidas de material en desechos. La presente investigación ostenta teóricamente un método no destructivo empleando el martillo de impacto para generar vibraciones en las placas de acero. Las lecturas son obtenidas utilizando la vibrometría laser Doppler la cual busca identificar cambios en la microestructura de los aceros. No se obtienen resultados prácticos, debido a la contingencia del Covid-19, por lo cual solo se presenta un método teórico y las bases de la metodología que podrá seguirse una vez que se incorpore un nuevo estudiante a este proyecto. ","downloadable_attachments":[{"id":65690300,"asset_id":45122496,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":26750521,"first_name":"Carlos","last_name":"Martinez","domain_name":"independent","page_name":"CarlosMartinez160","display_name":"Carlos Martinez","profile_url":"https://independent.academia.edu/CarlosMartinez160?f_ri=1010378","photo":"/images/s65_no_pic.png"}],"research_interests":[{"id":41009,"name":"Non Destructive Testing","url":"https://www.academia.edu/Documents/in/Non_Destructive_Testing?f_ri=1010378","nofollow":true},{"id":93023,"name":"Laser Doppler Vibrometry","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometry?f_ri=1010378","nofollow":true},{"id":793619,"name":"DP Steel","url":"https://www.academia.edu/Documents/in/DP_Steel?f_ri=1010378","nofollow":true},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378","nofollow":true}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_9959263" data-work_id="9959263" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/9959263/Scaling_the_Operating_Deflection_Shapes_Obtained_from_Scanning_Laser_Doppler_Vibrometer">Scaling the Operating Deflection Shapes Obtained from Scanning Laser Doppler Vibrometer</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">Operating Deflection Shapes (ODS) has emerged as one of the powerful techniques in vibration analysis to understand and to evaluate the absolute dynamic behaviour of a machine, component or an entire structure. Traditionally,... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_9959263" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">Operating Deflection Shapes (ODS) has emerged as one of the powerful techniques in vibration analysis to understand and to evaluate the absolute dynamic behaviour of a machine, component or an entire structure. Traditionally, accelerometers have been used to get the ODS of a structure. However, recent development shows that certain situation may not allow direct contact with the structure under investigation. Therefore, Scanning Laser Doppler Vibrometer (SLDV) has become popular in the investigation. In this paper, a new ODS Frequency Response Function (ODS FRF) for investigations using SLDV is formulated. The ODS FRF is used to construct the ODS of the structure. A new form of scale factor for the ODS FRF is also introduced to normalize the effects from variable excitation force. The importance of this scale factor is demonstrated on a beam and plate under the excitation of varying forces. It is found that the suggested ODS FRF and the scale factor give the desired result in comparison with theory.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/9959263" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="8cab7d0290bab4c695598156e4dfb9d7" rel="nofollow" data-download="{"attachment_id":47591049,"asset_id":9959263,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/47591049/download_file?st=MTc0MDg3MDkxOSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="24199715" href="https://ums.academia.edu/JedolDayou">Jedol Dayou</a><script data-card-contents-for-user="24199715" type="text/json">{"id":24199715,"first_name":"Jedol","last_name":"Dayou","domain_name":"ums","page_name":"JedolDayou","display_name":"Jedol Dayou","profile_url":"https://ums.academia.edu/JedolDayou?f_ri=1010378","photo":"https://0.academia-photos.com/24199715/79120595/67681717/s65_jedol.dayou.jpeg"}</script></span></span></li><li class="js-paper-rank-work_9959263 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="9959263"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 9959263, container: ".js-paper-rank-work_9959263", }); });</script></li><li class="js-percentile-work_9959263 InlineList-item InlineList-item--bordered hidden u-tcGrayDark"><span class="percentile-widget hidden"><span class="u-mr2x percentile-widget" style="display: none">•</span><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 9959263; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-percentile-work_9959263"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></li><li class="js-view-count-work_9959263 InlineList-item InlineList-item--bordered hidden"><div><span><span class="js-view-count view-count u-mr2x" data-work-id="9959263"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 9959263; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=9959263]").text(description); $(".js-view-count-work_9959263").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_9959263").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="9959263"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">7</a>  </div><span class="InlineList-item-text u-textTruncate u-pl9x"><a class="InlineList-item-text" data-has-card-for-ri="56" rel="nofollow" href="https://www.academia.edu/Documents/in/Materials_Engineering">Materials Engineering</a>, <script data-card-contents-for-ri="56" type="text/json">{"id":56,"name":"Materials Engineering","url":"https://www.academia.edu/Documents/in/Materials_Engineering?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="14108" rel="nofollow" href="https://www.academia.edu/Documents/in/Damage_detection">Damage detection</a>, <script data-card-contents-for-ri="14108" type="text/json">{"id":14108,"name":"Damage detection","url":"https://www.academia.edu/Documents/in/Damage_detection?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="15641" rel="nofollow" href="https://www.academia.edu/Documents/in/Nondestructive_Evaluation">Nondestructive Evaluation</a>, <script data-card-contents-for-ri="15641" type="text/json">{"id":15641,"name":"Nondestructive Evaluation","url":"https://www.academia.edu/Documents/in/Nondestructive_Evaluation?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="113872" rel="nofollow" href="https://www.academia.edu/Documents/in/VIBRATION_ANALYSIS">VIBRATION ANALYSIS</a><script data-card-contents-for-ri="113872" type="text/json">{"id":113872,"name":"VIBRATION ANALYSIS","url":"https://www.academia.edu/Documents/in/VIBRATION_ANALYSIS?f_ri=1010378","nofollow":true}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=9959263]'), work: {"id":9959263,"title":"Scaling the Operating Deflection Shapes Obtained from Scanning Laser Doppler Vibrometer","created_at":"2014-12-30T20:10:02.655-08:00","url":"https://www.academia.edu/9959263/Scaling_the_Operating_Deflection_Shapes_Obtained_from_Scanning_Laser_Doppler_Vibrometer?f_ri=1010378","dom_id":"work_9959263","summary":"Operating Deflection Shapes (ODS) has emerged as one of the powerful techniques in vibration analysis to understand and to evaluate the absolute dynamic behaviour of a machine, component or an entire structure. Traditionally, accelerometers have been used to get the ODS of a structure. However, recent development shows that certain situation may not allow direct contact with the structure under investigation. Therefore, Scanning Laser Doppler Vibrometer (SLDV) has become popular in the investigation. In this paper, a new ODS Frequency Response Function (ODS FRF) for investigations using SLDV is formulated. The ODS FRF is used to construct the ODS of the structure. A new form of scale factor for the ODS FRF is also introduced to normalize the effects from variable excitation force. The importance of this scale factor is demonstrated on a beam and plate under the excitation of varying forces. It is found that the suggested ODS FRF and the scale factor give the desired result in comparison with theory.","downloadable_attachments":[{"id":47591049,"asset_id":9959263,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":24199715,"first_name":"Jedol","last_name":"Dayou","domain_name":"ums","page_name":"JedolDayou","display_name":"Jedol Dayou","profile_url":"https://ums.academia.edu/JedolDayou?f_ri=1010378","photo":"https://0.academia-photos.com/24199715/79120595/67681717/s65_jedol.dayou.jpeg"}],"research_interests":[{"id":56,"name":"Materials Engineering","url":"https://www.academia.edu/Documents/in/Materials_Engineering?f_ri=1010378","nofollow":true},{"id":14108,"name":"Damage detection","url":"https://www.academia.edu/Documents/in/Damage_detection?f_ri=1010378","nofollow":true},{"id":15641,"name":"Nondestructive Evaluation","url":"https://www.academia.edu/Documents/in/Nondestructive_Evaluation?f_ri=1010378","nofollow":true},{"id":113872,"name":"VIBRATION ANALYSIS","url":"https://www.academia.edu/Documents/in/VIBRATION_ANALYSIS?f_ri=1010378","nofollow":true},{"id":561731,"name":"Frequency Response Function","url":"https://www.academia.edu/Documents/in/Frequency_Response_Function?f_ri=1010378"},{"id":573949,"name":"Dynamic behaviour of materials","url":"https://www.academia.edu/Documents/in/Dynamic_behaviour_of_materials?f_ri=1010378"},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_37451481" data-work_id="37451481" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/37451481/Speed_Measurements_by_Optical_Techniques">Speed Measurements by Optical Techniques</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">Optical methods are most popular speed measurement techniques due to its non-destructive and non-contact in nature. Speed measurement by optical techniques are suitable for all sizes of objects. In this experiment, we dealt with... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_37451481" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">Optical methods are most popular speed measurement techniques due to its non-destructive and non-contact in nature. Speed measurement by optical techniques are suitable for all sizes of objects. In this experiment, we dealt with transverse speed measurement and Doppler shift measurement for the speed of train and rotating wheel. Fast rotating wheel in transverse speed measurement provided beat frequency of 1.87 MHz while our calculated beat frequency and fringes period were 2.47 MHz and 8.72 um, respectively. For slow moving wheel, the beat frequency was ~91 KHz and the calculated velocity for rotating wheel was 0.03392 m/s using the Doppler shift technique. The beat frequency for the moving train ranges from 266.304 KHz to 923.913 KHz for train speed of 0.068 m/s and 0.26 m/s.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/37451481" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="d53639c02abe9d16411c36fed5720ca4" rel="nofollow" data-download="{"attachment_id":57419124,"asset_id":37451481,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/57419124/download_file?st=MTc0MDg3MDkxOSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="7364686" href="https://lanl.academia.edu/AbuMitul">Abu Mitul, Ph.D.</a><script data-card-contents-for-user="7364686" type="text/json">{"id":7364686,"first_name":"Abu","last_name":"Mitul, Ph.D.","domain_name":"lanl","page_name":"AbuMitul","display_name":"Abu Mitul, Ph.D.","profile_url":"https://lanl.academia.edu/AbuMitul?f_ri=1010378","photo":"https://0.academia-photos.com/7364686/3006922/19054857/s65_abu.mitul.jpg"}</script></span></span></li><li class="js-paper-rank-work_37451481 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="37451481"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 37451481, container: ".js-paper-rank-work_37451481", }); });</script></li><li class="js-percentile-work_37451481 InlineList-item InlineList-item--bordered hidden u-tcGrayDark"><span class="percentile-widget hidden"><span class="u-mr2x percentile-widget" style="display: none">•</span><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 37451481; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-percentile-work_37451481"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></li><li class="js-view-count-work_37451481 InlineList-item InlineList-item--bordered hidden"><div><span><span class="js-view-count view-count u-mr2x" data-work-id="37451481"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 37451481; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=37451481]").text(description); $(".js-view-count-work_37451481").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_37451481").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="37451481"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">4</a>  </div><span class="InlineList-item-text u-textTruncate u-pl9x"><a class="InlineList-item-text" data-has-card-for-ri="71935" rel="nofollow" href="https://www.academia.edu/Documents/in/Doppler_Ultrasound">Doppler Ultrasound</a>, <script data-card-contents-for-ri="71935" type="text/json">{"id":71935,"name":"Doppler Ultrasound","url":"https://www.academia.edu/Documents/in/Doppler_Ultrasound?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="93023" rel="nofollow" href="https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometry">Laser Doppler Vibrometry</a>, <script data-card-contents-for-ri="93023" type="text/json">{"id":93023,"name":"Laser Doppler Vibrometry","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometry?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="521099" rel="nofollow" href="https://www.academia.edu/Documents/in/Doppler_effect">Doppler effect</a>, <script data-card-contents-for-ri="521099" type="text/json">{"id":521099,"name":"Doppler effect","url":"https://www.academia.edu/Documents/in/Doppler_effect?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="1010378" rel="nofollow" href="https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer">Laser Doppler Vibrometer</a><script data-card-contents-for-ri="1010378" type="text/json">{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378","nofollow":true}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=37451481]'), work: {"id":37451481,"title":"Speed Measurements by Optical Techniques","created_at":"2018-09-20T17:59:36.855-07:00","url":"https://www.academia.edu/37451481/Speed_Measurements_by_Optical_Techniques?f_ri=1010378","dom_id":"work_37451481","summary":"Optical methods are most popular speed measurement techniques due to its non-destructive and non-contact in nature. Speed measurement by optical techniques are suitable for all sizes of objects. In this experiment, we dealt with transverse speed measurement and Doppler shift measurement for the speed of train and rotating wheel. Fast rotating wheel in transverse speed measurement provided beat frequency of 1.87 MHz while our calculated beat frequency and fringes period were 2.47 MHz and 8.72 um, respectively. For slow moving wheel, the beat frequency was ~91 KHz and the calculated velocity for rotating wheel was 0.03392 m/s using the Doppler shift technique. The beat frequency for the moving train ranges from 266.304 KHz to 923.913 KHz for train speed of 0.068 m/s and 0.26 m/s.","downloadable_attachments":[{"id":57419124,"asset_id":37451481,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":7364686,"first_name":"Abu","last_name":"Mitul, Ph.D.","domain_name":"lanl","page_name":"AbuMitul","display_name":"Abu Mitul, Ph.D.","profile_url":"https://lanl.academia.edu/AbuMitul?f_ri=1010378","photo":"https://0.academia-photos.com/7364686/3006922/19054857/s65_abu.mitul.jpg"}],"research_interests":[{"id":71935,"name":"Doppler Ultrasound","url":"https://www.academia.edu/Documents/in/Doppler_Ultrasound?f_ri=1010378","nofollow":true},{"id":93023,"name":"Laser Doppler Vibrometry","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometry?f_ri=1010378","nofollow":true},{"id":521099,"name":"Doppler effect","url":"https://www.academia.edu/Documents/in/Doppler_effect?f_ri=1010378","nofollow":true},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378","nofollow":true}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_15120309 coauthored" data-work_id="15120309" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/15120309/Drgania_b%C5%82ony_b%C4%99benkowej_oceniane_Dopplerowskim_wibrometrem_laserowym">Drgania błony bębenkowej oceniane Dopplerowskim wibrometrem laserowym</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest">O t o l a r y ng o l o g i a P o l s k a t o m 6 3 , n r 2 , m a r ze c -k w i e c i e ń 2 0 0 9 FONIATRIA I AUDIOLOGIA / PHONIATRICS AND AUDIOLOGY</div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/15120309" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="fcddba75be31fce84b2c6f805e625e33" rel="nofollow" data-download="{"attachment_id":43565755,"asset_id":15120309,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/43565755/download_file?st=MTc0MDg3MDkxOSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="34158127" href="https://independent.academia.edu/MarcinSzyma%C5%84ski4">Marcin Szymański</a><script data-card-contents-for-user="34158127" type="text/json">{"id":34158127,"first_name":"Marcin","last_name":"Szymański","domain_name":"independent","page_name":"MarcinSzymański4","display_name":"Marcin Szymański","profile_url":"https://independent.academia.edu/MarcinSzyma%C5%84ski4?f_ri=1010378","photo":"/images/s65_no_pic.png"}</script></span></span><span class="u-displayInlineBlock InlineList-item-text"> and <span class="u-textDecorationUnderline u-clickable InlineList-item-text js-work-more-authors-15120309">+3</span><div class="hidden js-additional-users-15120309"><div><span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a href="https://independent.academia.edu/MorshedK">Kamal Morshed</a></span></div><div><span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a href="https://pollub.academia.edu/JWarminski">J. Warminski</a></span></div><div><span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a href="https://independent.academia.edu/RafalRusinek">Rafal Rusinek</a></span></div></div></span><script>(function(){ var popoverSettings = { el: $('.js-work-more-authors-15120309'), placement: 'bottom', hide_delay: 200, html: true, content: function(){ return $('.js-additional-users-15120309').html(); } } new HoverPopover(popoverSettings); })();</script></li><li class="js-paper-rank-work_15120309 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="15120309"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 15120309, container: ".js-paper-rank-work_15120309", }); });</script></li><li class="js-percentile-work_15120309 InlineList-item InlineList-item--bordered hidden u-tcGrayDark"><span class="percentile-widget hidden"><span class="u-mr2x percentile-widget" style="display: none">•</span><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 15120309; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-percentile-work_15120309"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></li><li class="js-view-count-work_15120309 InlineList-item InlineList-item--bordered hidden"><div><span><span class="js-view-count view-count u-mr2x" data-work-id="15120309"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 15120309; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=15120309]").text(description); $(".js-view-count-work_15120309").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_15120309").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="15120309"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">9</a>  </div><span class="InlineList-item-text u-textTruncate u-pl9x"><a class="InlineList-item-text" data-has-card-for-ri="23077" rel="nofollow" href="https://www.academia.edu/Documents/in/Vibration">Vibration</a>, <script data-card-contents-for-ri="23077" type="text/json">{"id":23077,"name":"Vibration","url":"https://www.academia.edu/Documents/in/Vibration?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="59746" rel="nofollow" href="https://www.academia.edu/Documents/in/Electrocardiology">Electrocardiology</a>, <script data-card-contents-for-ri="59746" type="text/json">{"id":59746,"name":"Electrocardiology","url":"https://www.academia.edu/Documents/in/Electrocardiology?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="247948" rel="nofollow" href="https://www.academia.edu/Documents/in/Cadaver">Cadaver</a>, <script data-card-contents-for-ri="247948" type="text/json">{"id":247948,"name":"Cadaver","url":"https://www.academia.edu/Documents/in/Cadaver?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="568367" rel="nofollow" href="https://www.academia.edu/Documents/in/Auditory_Threshold">Auditory Threshold</a><script data-card-contents-for-ri="568367" type="text/json">{"id":568367,"name":"Auditory Threshold","url":"https://www.academia.edu/Documents/in/Auditory_Threshold?f_ri=1010378","nofollow":true}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=15120309]'), work: {"id":15120309,"title":"Drgania błony bębenkowej oceniane Dopplerowskim wibrometrem laserowym","created_at":"2015-08-23T11:41:47.455-07:00","url":"https://www.academia.edu/15120309/Drgania_b%C5%82ony_b%C4%99benkowej_oceniane_Dopplerowskim_wibrometrem_laserowym?f_ri=1010378","dom_id":"work_15120309","summary":"O t o l a r y ng o l o g i a P o l s k a t o m 6 3 , n r 2 , m a r ze c -k w i e c i e ń 2 0 0 9 FONIATRIA I AUDIOLOGIA / PHONIATRICS AND AUDIOLOGY","downloadable_attachments":[{"id":43565755,"asset_id":15120309,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":34158127,"first_name":"Marcin","last_name":"Szymański","domain_name":"independent","page_name":"MarcinSzymański4","display_name":"Marcin Szymański","profile_url":"https://independent.academia.edu/MarcinSzyma%C5%84ski4?f_ri=1010378","photo":"/images/s65_no_pic.png"},{"id":34246382,"first_name":"Kamal","last_name":"Morshed","domain_name":"independent","page_name":"MorshedK","display_name":"Kamal Morshed","profile_url":"https://independent.academia.edu/MorshedK?f_ri=1010378","photo":"/images/s65_no_pic.png"},{"id":33984106,"first_name":"J.","last_name":"Warminski","domain_name":"pollub","page_name":"JWarminski","display_name":"J. Warminski","profile_url":"https://pollub.academia.edu/JWarminski?f_ri=1010378","photo":"/images/s65_no_pic.png"},{"id":34094002,"first_name":"Rafal","last_name":"Rusinek","domain_name":"independent","page_name":"RafalRusinek","display_name":"Rafal Rusinek","profile_url":"https://independent.academia.edu/RafalRusinek?f_ri=1010378","photo":"/images/s65_no_pic.png"}],"research_interests":[{"id":23077,"name":"Vibration","url":"https://www.academia.edu/Documents/in/Vibration?f_ri=1010378","nofollow":true},{"id":59746,"name":"Electrocardiology","url":"https://www.academia.edu/Documents/in/Electrocardiology?f_ri=1010378","nofollow":true},{"id":247948,"name":"Cadaver","url":"https://www.academia.edu/Documents/in/Cadaver?f_ri=1010378","nofollow":true},{"id":568367,"name":"Auditory Threshold","url":"https://www.academia.edu/Documents/in/Auditory_Threshold?f_ri=1010378","nofollow":true},{"id":1000427,"name":"Reference Values","url":"https://www.academia.edu/Documents/in/Reference_Values?f_ri=1010378"},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378"},{"id":1665885,"name":"Laser Doppler Flowmetry","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Flowmetry?f_ri=1010378"},{"id":1725725,"name":"Audiometry","url":"https://www.academia.edu/Documents/in/Audiometry?f_ri=1010378"},{"id":1746782,"name":"Tympanic Membrane","url":"https://www.academia.edu/Documents/in/Tympanic_Membrane?f_ri=1010378"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_27520099" data-work_id="27520099" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/27520099/Process_monitoring_and_effects_of_process_parameters_on_responses_in_Turn_Milling_operations_based_on_SN_ratio_and_ANOVA">Process monitoring and effects of process parameters on responses in Turn-Milling operations based on SN ratio and ANOVA</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">Process monitoring in machining constitutes machine performance and machine condition for performing the desired objective. The optimality and effect of machining parameters on machine performance monitoring in tangential and orthogonal... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_27520099" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">Process monitoring in machining constitutes machine performance and machine condition for performing the desired objective. The optimality and effect of machining parameters on machine performance monitoring in tangential and orthogonal turn-milling processes is been studied. Surface Roughness (Ra) and Surface Hardness (H) has been taken as machine performance responses and Tool Vibrations (VIB) as machine condition monitoring response. Laser Doppler Vibrometer (LDV) is used for online capturing of tool vibrations and is analyzed using VibSoft analyzer for processing Acousto-optic emissions (AOE). Single cut machining on A-axis of CNC Vertical Milling centre using HSS End Mill cutters is adopted. Process parameters like cutter (tool) speed, feed rate and depth of cut with constant rotation of workpiece on A-axis are chosen while machining Brass material under dry condition. Statistical design of experiments (DOE) based on Taguchi’s Orthogonal Array (OA) is adopted for experimentation and Signal-to-Noise Ratio (SN ratio) of the responses is used for finding optimality of process parameters. The influence and contribution of the process parameters on the responses is been studied with help of Analysis of Variance (ANOVA).</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/27520099" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="eebea56f72da3d2c89d8de47fe86ff77" rel="nofollow" data-download="{"attachment_id":47932067,"asset_id":27520099,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/47932067/download_file?st=MTc0MDg3MDkxOSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="2960793" href="https://gitam.academia.edu/arunvikramk">arun vikram k</a><script data-card-contents-for-user="2960793" type="text/json">{"id":2960793,"first_name":"arun vikram","last_name":"k","domain_name":"gitam","page_name":"arunvikramk","display_name":"arun vikram k","profile_url":"https://gitam.academia.edu/arunvikramk?f_ri=1010378","photo":"https://0.academia-photos.com/2960793/977803/13838709/s65_arun_vikram.k.jpg"}</script></span></span></li><li class="js-paper-rank-work_27520099 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="27520099"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 27520099, container: ".js-paper-rank-work_27520099", }); 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The optimality and effect of machining parameters on machine performance monitoring in tangential and orthogonal turn-milling processes is been studied. Surface Roughness (Ra) and Surface Hardness (H) has been taken as machine performance responses and Tool Vibrations (VIB) as machine condition monitoring response. Laser Doppler Vibrometer (LDV) is used for online capturing of tool vibrations and is analyzed using VibSoft analyzer for processing Acousto-optic emissions (AOE). Single cut machining on A-axis of CNC Vertical Milling centre using HSS End Mill cutters is adopted. Process parameters like cutter (tool) speed, feed rate and depth of cut with constant rotation of workpiece on A-axis are chosen while machining Brass material under dry condition. Statistical design of experiments (DOE) based on Taguchi’s Orthogonal Array (OA) is adopted for experimentation and Signal-to-Noise Ratio (SN ratio) of the responses is used for finding optimality of process parameters. The influence and contribution of the process parameters on the responses is been studied with help of Analysis of Variance (ANOVA).","downloadable_attachments":[{"id":47932067,"asset_id":27520099,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":2960793,"first_name":"arun vikram","last_name":"k","domain_name":"gitam","page_name":"arunvikramk","display_name":"arun vikram k","profile_url":"https://gitam.academia.edu/arunvikramk?f_ri=1010378","photo":"https://0.academia-photos.com/2960793/977803/13838709/s65_arun_vikram.k.jpg"}],"research_interests":[{"id":85366,"name":"ANOVA","url":"https://www.academia.edu/Documents/in/ANOVA?f_ri=1010378","nofollow":true},{"id":413023,"name":"Roughness","url":"https://www.academia.edu/Documents/in/Roughness?f_ri=1010378","nofollow":true},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378","nofollow":true},{"id":2507912,"name":"Turn-Milling","url":"https://www.academia.edu/Documents/in/Turn-Milling?f_ri=1010378","nofollow":true}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_13927233" data-work_id="13927233" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/13927233/Peripheral_Vascular_Noninvasive_Measurements">Peripheral Vascular Noninvasive Measurements</a></div></div><div class="u-pb4x u-mt3x"></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/13927233" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="fba8796fc1b72b84b83f0d6d44c2b79b" rel="nofollow" data-download="{"attachment_id":44798323,"asset_id":13927233,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/44798323/download_file?st=MTc0MDg3MDkxOSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="32976979" href="https://independent.academia.edu/HarryGraber">Harry L Graber</a><script data-card-contents-for-user="32976979" type="text/json">{"id":32976979,"first_name":"Harry","last_name":"Graber","domain_name":"independent","page_name":"HarryGraber","display_name":"Harry L Graber","profile_url":"https://independent.academia.edu/HarryGraber?f_ri=1010378","photo":"/images/s65_no_pic.png"}</script></span></span></li><li class="js-paper-rank-work_13927233 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="13927233"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 13927233, container: ".js-paper-rank-work_13927233", }); 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$(".js-view-count[data-work-id=13927233]").text(description); $(".js-view-count-work_13927233").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_13927233").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="13927233"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">2</a>  </div><span class="InlineList-item-text u-textTruncate u-pl9x"><a class="InlineList-item-text" data-has-card-for-ri="768372" rel="nofollow" href="https://www.academia.edu/Documents/in/Plethysmography">Plethysmography</a>, <script data-card-contents-for-ri="768372" type="text/json">{"id":768372,"name":"Plethysmography","url":"https://www.academia.edu/Documents/in/Plethysmography?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="1010378" rel="nofollow" href="https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer">Laser Doppler Vibrometer</a><script data-card-contents-for-ri="1010378" type="text/json">{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378","nofollow":true}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=13927233]'), work: {"id":13927233,"title":"Peripheral Vascular Noninvasive Measurements","created_at":"2015-07-11T15:01:13.589-07:00","url":"https://www.academia.edu/13927233/Peripheral_Vascular_Noninvasive_Measurements?f_ri=1010378","dom_id":"work_13927233","summary":null,"downloadable_attachments":[{"id":44798323,"asset_id":13927233,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":32976979,"first_name":"Harry","last_name":"Graber","domain_name":"independent","page_name":"HarryGraber","display_name":"Harry L Graber","profile_url":"https://independent.academia.edu/HarryGraber?f_ri=1010378","photo":"/images/s65_no_pic.png"}],"research_interests":[{"id":768372,"name":"Plethysmography","url":"https://www.academia.edu/Documents/in/Plethysmography?f_ri=1010378","nofollow":true},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378","nofollow":true}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_21705320" data-work_id="21705320" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/21705320/LDV_Remote_Voice_Acquisition_and_Enhancement">LDV Remote Voice Acquisition and Enhancement</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">Laser Doppler vibrometers (LDVs) have been widely used in industry inspection. One of the superior characteristics of an LDV is that it can detect and measure extremely tiny vibration of a target at a large distance, with sensitivity on... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_21705320" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">Laser Doppler vibrometers (LDVs) have been widely used in industry inspection. One of the superior characteristics of an LDV is that it can detect and measure extremely tiny vibration of a target at a large distance, with sensitivity on the order of 1µm/s. On the other hand, we have found that most objects nearby audio sources can be vibrated by the audio waves. These two aspects motivate our research in a new application of the LDVs, namely remote voice detection from surrounding vibrated objects. However, the detected speech signals may be corrupted by many noise sources, such as laser photon noises, target movements, and background acoustic noises (wind, engine sound, etc.). Therefore, speech enhancement algorithms based on Gaussian bandpass and Wiener filters are designed to effectively improve the intelligibility of the noisy voice signals detected by the LDV system Experimental results show that remote voice detection via an LDV is very promising, when choosing appropriate targets close to human subjects and using the proposed enhancement techniques.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/21705320" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="4c3c844e4f05cfc50de8824361c539c1" rel="nofollow" data-download="{"attachment_id":42414479,"asset_id":21705320,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/42414479/download_file?st=MTc0MDg3MDkxOSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="42885215" href="https://independent.academia.edu/MingLiu33">Ming Liu</a><script data-card-contents-for-user="42885215" type="text/json">{"id":42885215,"first_name":"Ming","last_name":"Liu","domain_name":"independent","page_name":"MingLiu33","display_name":"Ming Liu","profile_url":"https://independent.academia.edu/MingLiu33?f_ri=1010378","photo":"/images/s65_no_pic.png"}</script></span></span></li><li class="js-paper-rank-work_21705320 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="21705320"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 21705320, container: ".js-paper-rank-work_21705320", }); 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$(".js-view-count[data-work-id=21705320]").text(description); $(".js-view-count-work_21705320").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_21705320").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="21705320"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">6</a>  </div><span class="InlineList-item-text u-textTruncate u-pl9x"><a class="InlineList-item-text" data-has-card-for-ri="96797" rel="nofollow" href="https://www.academia.edu/Documents/in/Speech_enhancement">Speech enhancement</a>, <script data-card-contents-for-ri="96797" type="text/json">{"id":96797,"name":"Speech enhancement","url":"https://www.academia.edu/Documents/in/Speech_enhancement?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="261044" rel="nofollow" href="https://www.academia.edu/Documents/in/Acoustic_Noise">Acoustic Noise</a>, <script data-card-contents-for-ri="261044" type="text/json">{"id":261044,"name":"Acoustic Noise","url":"https://www.academia.edu/Documents/in/Acoustic_Noise?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="439526" rel="nofollow" href="https://www.academia.edu/Documents/in/Signal_Detection">Signal Detection</a>, <script data-card-contents-for-ri="439526" type="text/json">{"id":439526,"name":"Signal Detection","url":"https://www.academia.edu/Documents/in/Signal_Detection?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="504420" rel="nofollow" href="https://www.academia.edu/Documents/in/Wiener_filter">Wiener filter</a><script data-card-contents-for-ri="504420" type="text/json">{"id":504420,"name":"Wiener filter","url":"https://www.academia.edu/Documents/in/Wiener_filter?f_ri=1010378","nofollow":true}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=21705320]'), work: {"id":21705320,"title":"LDV Remote Voice Acquisition and Enhancement","created_at":"2016-02-08T16:07:17.439-08:00","url":"https://www.academia.edu/21705320/LDV_Remote_Voice_Acquisition_and_Enhancement?f_ri=1010378","dom_id":"work_21705320","summary":"Laser Doppler vibrometers (LDVs) have been widely used in industry inspection. One of the superior characteristics of an LDV is that it can detect and measure extremely tiny vibration of a target at a large distance, with sensitivity on the order of 1µm/s. On the other hand, we have found that most objects nearby audio sources can be vibrated by the audio waves. These two aspects motivate our research in a new application of the LDVs, namely remote voice detection from surrounding vibrated objects. However, the detected speech signals may be corrupted by many noise sources, such as laser photon noises, target movements, and background acoustic noises (wind, engine sound, etc.). Therefore, speech enhancement algorithms based on Gaussian bandpass and Wiener filters are designed to effectively improve the intelligibility of the noisy voice signals detected by the LDV system Experimental results show that remote voice detection via an LDV is very promising, when choosing appropriate targets close to human subjects and using the proposed enhancement techniques.","downloadable_attachments":[{"id":42414479,"asset_id":21705320,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":42885215,"first_name":"Ming","last_name":"Liu","domain_name":"independent","page_name":"MingLiu33","display_name":"Ming Liu","profile_url":"https://independent.academia.edu/MingLiu33?f_ri=1010378","photo":"/images/s65_no_pic.png"}],"research_interests":[{"id":96797,"name":"Speech enhancement","url":"https://www.academia.edu/Documents/in/Speech_enhancement?f_ri=1010378","nofollow":true},{"id":261044,"name":"Acoustic Noise","url":"https://www.academia.edu/Documents/in/Acoustic_Noise?f_ri=1010378","nofollow":true},{"id":439526,"name":"Signal Detection","url":"https://www.academia.edu/Documents/in/Signal_Detection?f_ri=1010378","nofollow":true},{"id":504420,"name":"Wiener filter","url":"https://www.academia.edu/Documents/in/Wiener_filter?f_ri=1010378","nofollow":true},{"id":979686,"name":"Human Subjects","url":"https://www.academia.edu/Documents/in/Human_Subjects?f_ri=1010378"},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_773327" data-work_id="773327" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/773327/Experimental_study_of_laser_Doppler_vibrometer_and_ambient_vibration_for_vibration_based_damage_detection">Experimental study of laser Doppler vibrometer and ambient vibration for vibration-based damage detection</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">This paper presents a study on the application of a laser Doppler vibrometer (LDV) for structural health monitoring using ambient vibration. The work covers three important issues namely, data acquisition, system identification, and... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_773327" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">This paper presents a study on the application of a laser Doppler vibrometer (LDV) for structural health monitoring using ambient vibration. The work covers three important issues namely, data acquisition, system identification, and structural damage detection. A two-laser system is employed for data acquisition using ambient response of the structure. Modal parameters are estimated by the eigensystem realization algorithm, after first deriving the impulse response functions from both laser responses using the Natural Excitation Technique. In damage detection, a new matrix-updating-based method is proposed. The essential feature of this method is the non-iterative solving technique of inverse problem, which allows damage to be located and quantified by employing the modal parameters obtained before and after damage. Numerical simulation and laboratory-scaled experiments using bolted lap joint plate demonstrate that the proposed technique can detect locations and magnitude of damage with incomplete modal information.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/773327" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="1a121f7e9a2015f0be1a4c78b7e2dcb2" rel="nofollow" data-download="{"attachment_id":4554562,"asset_id":773327,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/4554562/download_file?st=MTc0MDg3MDkxOSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="600948" href="https://ynu.academia.edu/DionysiusSiringoringo">Dionysius Siringoringo</a><script data-card-contents-for-user="600948" type="text/json">{"id":600948,"first_name":"Dionysius","last_name":"Siringoringo","domain_name":"ynu","page_name":"DionysiusSiringoringo","display_name":"Dionysius Siringoringo","profile_url":"https://ynu.academia.edu/DionysiusSiringoringo?f_ri=1010378","photo":"https://0.academia-photos.com/600948/210438/45170754/s65_dionysius.siringoringo.png"}</script></span></span></li><li class="js-paper-rank-work_773327 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="773327"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 773327, container: ".js-paper-rank-work_773327", }); });</script></li><li class="js-percentile-work_773327 InlineList-item InlineList-item--bordered hidden u-tcGrayDark"><span class="percentile-widget hidden"><span class="u-mr2x percentile-widget" style="display: none">•</span><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 773327; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-percentile-work_773327"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></li><li class="js-view-count-work_773327 InlineList-item InlineList-item--bordered hidden"><div><span><span class="js-view-count view-count u-mr2x" data-work-id="773327"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 773327; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=773327]").text(description); $(".js-view-count-work_773327").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_773327").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="773327"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">3</a>  </div><span class="InlineList-item-text u-textTruncate u-pl9x"><a class="InlineList-item-text" data-has-card-for-ri="13615" rel="nofollow" href="https://www.academia.edu/Documents/in/Modal_Analysis">Modal Analysis</a>, <script data-card-contents-for-ri="13615" type="text/json">{"id":13615,"name":"Modal Analysis","url":"https://www.academia.edu/Documents/in/Modal_Analysis?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="1010378" rel="nofollow" href="https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer">Laser Doppler Vibrometer</a>, <script data-card-contents-for-ri="1010378" type="text/json">{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="1010384" rel="nofollow" href="https://www.academia.edu/Documents/in/Ambient_Vibration">Ambient Vibration</a><script data-card-contents-for-ri="1010384" type="text/json">{"id":1010384,"name":"Ambient Vibration","url":"https://www.academia.edu/Documents/in/Ambient_Vibration?f_ri=1010378","nofollow":true}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=773327]'), work: {"id":773327,"title":"Experimental study of laser Doppler vibrometer and ambient vibration for vibration-based damage detection","created_at":"2011-07-24T22:28:14.205-07:00","url":"https://www.academia.edu/773327/Experimental_study_of_laser_Doppler_vibrometer_and_ambient_vibration_for_vibration_based_damage_detection?f_ri=1010378","dom_id":"work_773327","summary":"This paper presents a study on the application of a laser Doppler vibrometer (LDV) for structural health monitoring using ambient vibration. The work covers three important issues namely, data acquisition, system identification, and structural damage detection. A two-laser system is employed for data acquisition using ambient response of the structure. Modal parameters are estimated by the eigensystem realization algorithm, after first deriving the impulse response functions from both laser responses using the Natural Excitation Technique. In damage detection, a new matrix-updating-based method is proposed. The essential feature of this method is the non-iterative solving technique of inverse problem, which allows damage to be located and quantified by employing the modal parameters obtained before and after damage. Numerical simulation and laboratory-scaled experiments using bolted lap joint plate demonstrate that the proposed technique can detect locations and magnitude of damage with incomplete modal information.","downloadable_attachments":[{"id":4554562,"asset_id":773327,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":600948,"first_name":"Dionysius","last_name":"Siringoringo","domain_name":"ynu","page_name":"DionysiusSiringoringo","display_name":"Dionysius Siringoringo","profile_url":"https://ynu.academia.edu/DionysiusSiringoringo?f_ri=1010378","photo":"https://0.academia-photos.com/600948/210438/45170754/s65_dionysius.siringoringo.png"}],"research_interests":[{"id":13615,"name":"Modal Analysis","url":"https://www.academia.edu/Documents/in/Modal_Analysis?f_ri=1010378","nofollow":true},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378","nofollow":true},{"id":1010384,"name":"Ambient Vibration","url":"https://www.academia.edu/Documents/in/Ambient_Vibration?f_ri=1010378","nofollow":true}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_7279774" data-work_id="7279774" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/7279774/The_electret_properties_of_two_kinds_of_poly_vinylidene_fluoride_hexafluoropropylene_copolymer_films">The electret properties of two kinds of poly(vinylidene fluoride-hexafluoropropylene) copolymer films</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">P(VDF-HFP) (poly(vinylidene fluoride-hexafluoropropylene)) copolymer is a new member of PVDF family. In this paper, the electret properties of the two kinds of casting prepared P(VDF-HFP) copolymer films whose content of HFP is 4.7% and... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_7279774" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">P(VDF-HFP) (poly(vinylidene fluoride-hexafluoropropylene)) copolymer is a new member of PVDF family. In this paper, the electret properties of the two kinds of casting prepared P(VDF-HFP) copolymer films whose content of HFP is 4.7% and 5.9% respectively were discussed with the focus on the influences of mechanically thermal stretching process and of the content of HFP on electret properties of the said copolymer. Experimental results point out that the said copolymer electret film is a polar material, i.e. there exist both oriented dipoles and deposited space charges in the film after charging. The mechanically thermal stretching process not only increases the density of oriented dipoles and deposited space charges but also improves the stability of deposited space charges; however, the increase of HFP content in the copolymer has a negative impact on the density of oriented dipoles and deposited space charges. The measurement result by means of Laser Doppler Vibrometer shows the copolymer in which the HFP content is 4.7% has a notable converse coefficient as high as 130pmNV.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/7279774" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="b056fb17ed84beaf2122742891e021a9" rel="nofollow" data-download="{"attachment_id":48539892,"asset_id":7279774,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/48539892/download_file?st=MTc0MDg3MDkxOSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="12715070" href="https://une-au.academia.edu/FEIPENGWang">FEIPENG Wang</a><script data-card-contents-for-user="12715070" type="text/json">{"id":12715070,"first_name":"FEIPENG","last_name":"Wang","domain_name":"une-au","page_name":"FEIPENGWang","display_name":"FEIPENG Wang","profile_url":"https://une-au.academia.edu/FEIPENGWang?f_ri=1010378","photo":"/images/s65_no_pic.png"}</script></span></span></li><li class="js-paper-rank-work_7279774 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="7279774"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 7279774, container: ".js-paper-rank-work_7279774", }); });</script></li><li class="js-percentile-work_7279774 InlineList-item InlineList-item--bordered hidden u-tcGrayDark"><span class="percentile-widget hidden"><span class="u-mr2x percentile-widget" style="display: none">•</span><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 7279774; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-percentile-work_7279774"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></li><li class="js-view-count-work_7279774 InlineList-item InlineList-item--bordered hidden"><div><span><span class="js-view-count view-count u-mr2x" data-work-id="7279774"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 7279774; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=7279774]").text(description); $(".js-view-count-work_7279774").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_7279774").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="7279774"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">5</a>  </div><span class="InlineList-item-text u-textTruncate u-pl9x"><a class="InlineList-item-text" data-has-card-for-ri="29657" rel="nofollow" href="https://www.academia.edu/Documents/in/Polymer_Blends">Polymer Blends</a>, <script data-card-contents-for-ri="29657" type="text/json">{"id":29657,"name":"Polymer Blends","url":"https://www.academia.edu/Documents/in/Polymer_Blends?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="41010" rel="nofollow" href="https://www.academia.edu/Documents/in/Casting">Casting</a>, <script data-card-contents-for-ri="41010" type="text/json">{"id":41010,"name":"Casting","url":"https://www.academia.edu/Documents/in/Casting?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="762611" rel="nofollow" href="https://www.academia.edu/Documents/in/Space_Charge">Space Charge</a>, <script data-card-contents-for-ri="762611" type="text/json">{"id":762611,"name":"Space Charge","url":"https://www.academia.edu/Documents/in/Space_Charge?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="986783" rel="nofollow" href="https://www.academia.edu/Documents/in/Electrets">Electrets</a><script data-card-contents-for-ri="986783" type="text/json">{"id":986783,"name":"Electrets","url":"https://www.academia.edu/Documents/in/Electrets?f_ri=1010378","nofollow":true}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=7279774]'), work: {"id":7279774,"title":"The electret properties of two kinds of poly(vinylidene fluoride-hexafluoropropylene) copolymer films","created_at":"2014-06-06T19:02:35.938-07:00","url":"https://www.academia.edu/7279774/The_electret_properties_of_two_kinds_of_poly_vinylidene_fluoride_hexafluoropropylene_copolymer_films?f_ri=1010378","dom_id":"work_7279774","summary":"P(VDF-HFP) (poly(vinylidene fluoride-hexafluoropropylene)) copolymer is a new member of PVDF family. In this paper, the electret properties of the two kinds of casting prepared P(VDF-HFP) copolymer films whose content of HFP is 4.7% and 5.9% respectively were discussed with the focus on the influences of mechanically thermal stretching process and of the content of HFP on electret properties of the said copolymer. Experimental results point out that the said copolymer electret film is a polar material, i.e. there exist both oriented dipoles and deposited space charges in the film after charging. The mechanically thermal stretching process not only increases the density of oriented dipoles and deposited space charges but also improves the stability of deposited space charges; however, the increase of HFP content in the copolymer has a negative impact on the density of oriented dipoles and deposited space charges. The measurement result by means of Laser Doppler Vibrometer shows the copolymer in which the HFP content is 4.7% has a notable converse coefficient as high as 130pmNV.","downloadable_attachments":[{"id":48539892,"asset_id":7279774,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":12715070,"first_name":"FEIPENG","last_name":"Wang","domain_name":"une-au","page_name":"FEIPENGWang","display_name":"FEIPENG Wang","profile_url":"https://une-au.academia.edu/FEIPENGWang?f_ri=1010378","photo":"/images/s65_no_pic.png"}],"research_interests":[{"id":29657,"name":"Polymer Blends","url":"https://www.academia.edu/Documents/in/Polymer_Blends?f_ri=1010378","nofollow":true},{"id":41010,"name":"Casting","url":"https://www.academia.edu/Documents/in/Casting?f_ri=1010378","nofollow":true},{"id":762611,"name":"Space Charge","url":"https://www.academia.edu/Documents/in/Space_Charge?f_ri=1010378","nofollow":true},{"id":986783,"name":"Electrets","url":"https://www.academia.edu/Documents/in/Electrets?f_ri=1010378","nofollow":true},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_27244711" data-work_id="27244711" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/27244711/Measurement_and_analysis_of_rolling_tire_vibrations">Measurement and analysis of rolling tire vibrations</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">This paper presents the measurement and analysis of rolling tire vibrations due to road impact excitations, such as from cobbled roads, junctions between concrete road surface plates, railroad crossings. Vibrations of the tire surface due... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_27244711" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">This paper presents the measurement and analysis of rolling tire vibrations due to road impact excitations, such as from cobbled roads, junctions between concrete road surface plates, railroad crossings. Vibrations of the tire surface due to road impact excitations cause noise radiation in the frequency band typically below 500 Hz. Tire vibration measurements with a laser Doppler vibrometer are performed on a test set-up based on a tire-on-tire principle which allows highly repetitive and controllable impact excitation tests under various realistic operating conditions. The influence on the measured velocity of random noise, cross sensitivity and alignment errors is discussed. An operational modal analysis technique is applied on sequential vibration measurements to characterise the dynamic behaviour of the rolling tire. Comparison between the operational modal parameters of the rolling tire and the modal parameters of the non-rolling tire allows an assessment of the changes in dynamic behaviour due to rolling.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/27244711" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="93e49dbde7b4310dcd956d9031178554" rel="nofollow" data-download="{"attachment_id":47503771,"asset_id":27244711,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/47503771/download_file?st=MTc0MDg3MDkxOSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="37884068" href="https://independent.academia.edu/WDesmet">Wim Desmet</a><script data-card-contents-for-user="37884068" type="text/json">{"id":37884068,"first_name":"Wim","last_name":"Desmet","domain_name":"independent","page_name":"WDesmet","display_name":"Wim Desmet","profile_url":"https://independent.academia.edu/WDesmet?f_ri=1010378","photo":"/images/s65_no_pic.png"}</script></span></span></li><li class="js-paper-rank-work_27244711 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="27244711"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 27244711, container: ".js-paper-rank-work_27244711", }); 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$(".js-view-count[data-work-id=27244711]").text(description); $(".js-view-count-work_27244711").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_27244711").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="27244711"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">12</a>  </div><span class="InlineList-item-text u-textTruncate u-pl10x"><a class="InlineList-item-text" data-has-card-for-ri="3769" rel="nofollow" href="https://www.academia.edu/Documents/in/Vibrations">Vibrations</a>, <script data-card-contents-for-ri="3769" type="text/json">{"id":3769,"name":"Vibrations","url":"https://www.academia.edu/Documents/in/Vibrations?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="13615" rel="nofollow" href="https://www.academia.edu/Documents/in/Modal_Analysis">Modal Analysis</a>, <script data-card-contents-for-ri="13615" type="text/json">{"id":13615,"name":"Modal Analysis","url":"https://www.academia.edu/Documents/in/Modal_Analysis?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="23077" rel="nofollow" href="https://www.academia.edu/Documents/in/Vibration">Vibration</a>, <script data-card-contents-for-ri="23077" type="text/json">{"id":23077,"name":"Vibration","url":"https://www.academia.edu/Documents/in/Vibration?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="263152" rel="nofollow" href="https://www.academia.edu/Documents/in/Optical_physics">Optical physics</a><script data-card-contents-for-ri="263152" type="text/json">{"id":263152,"name":"Optical physics","url":"https://www.academia.edu/Documents/in/Optical_physics?f_ri=1010378","nofollow":true}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=27244711]'), work: {"id":27244711,"title":"Measurement and analysis of rolling tire vibrations","created_at":"2016-07-25T07:57:11.031-07:00","url":"https://www.academia.edu/27244711/Measurement_and_analysis_of_rolling_tire_vibrations?f_ri=1010378","dom_id":"work_27244711","summary":"This paper presents the measurement and analysis of rolling tire vibrations due to road impact excitations, such as from cobbled roads, junctions between concrete road surface plates, railroad crossings. Vibrations of the tire surface due to road impact excitations cause noise radiation in the frequency band typically below 500 Hz. Tire vibration measurements with a laser Doppler vibrometer are performed on a test set-up based on a tire-on-tire principle which allows highly repetitive and controllable impact excitation tests under various realistic operating conditions. The influence on the measured velocity of random noise, cross sensitivity and alignment errors is discussed. An operational modal analysis technique is applied on sequential vibration measurements to characterise the dynamic behaviour of the rolling tire. Comparison between the operational modal parameters of the rolling tire and the modal parameters of the non-rolling tire allows an assessment of the changes in dynamic behaviour due to rolling.","downloadable_attachments":[{"id":47503771,"asset_id":27244711,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":37884068,"first_name":"Wim","last_name":"Desmet","domain_name":"independent","page_name":"WDesmet","display_name":"Wim Desmet","profile_url":"https://independent.academia.edu/WDesmet?f_ri=1010378","photo":"/images/s65_no_pic.png"}],"research_interests":[{"id":3769,"name":"Vibrations","url":"https://www.academia.edu/Documents/in/Vibrations?f_ri=1010378","nofollow":true},{"id":13615,"name":"Modal Analysis","url":"https://www.academia.edu/Documents/in/Modal_Analysis?f_ri=1010378","nofollow":true},{"id":23077,"name":"Vibration","url":"https://www.academia.edu/Documents/in/Vibration?f_ri=1010378","nofollow":true},{"id":263152,"name":"Optical physics","url":"https://www.academia.edu/Documents/in/Optical_physics?f_ri=1010378","nofollow":true},{"id":477865,"name":"Operant Conditioning","url":"https://www.academia.edu/Documents/in/Operant_Conditioning?f_ri=1010378"},{"id":507797,"name":"Operational modal analysis","url":"https://www.academia.edu/Documents/in/Operational_modal_analysis?f_ri=1010378"},{"id":545191,"name":"Route","url":"https://www.academia.edu/Documents/in/Route?f_ri=1010378"},{"id":573949,"name":"Dynamic behaviour of materials","url":"https://www.academia.edu/Documents/in/Dynamic_behaviour_of_materials?f_ri=1010378"},{"id":921637,"name":"Rolling","url":"https://www.academia.edu/Documents/in/Rolling?f_ri=1010378"},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378"},{"id":1366094,"name":"Vibrometer","url":"https://www.academia.edu/Documents/in/Vibrometer?f_ri=1010378"},{"id":1410014,"name":"Optics and Lasers In Engineering","url":"https://www.academia.edu/Documents/in/Optics_and_Lasers_In_Engineering?f_ri=1010378"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_24837933" data-work_id="24837933" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/24837933/The_Mechanical_Response_of_Shape_Memory_Alloys_Under_a_Rapid_Heating_Pulse">The Mechanical Response of Shape Memory Alloys Under a Rapid Heating Pulse</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">Shape memory alloy (SMA) actuators are very promising due to their large strain and work-output, but are considered to be very slow due to their cooling rate. In this article, we explore the capabilities of a fast one-directional... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_24837933" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">Shape memory alloy (SMA) actuators are very promising due to their large strain and work-output, but are considered to be very slow due to their cooling rate. In this article, we explore the capabilities of a fast one-directional actuation mode based on one-occasional rapid Joule heating of SMA elements. For this purpose, a unique experimental system has been developed that applies a high-voltage electric pulse to a detwined NiTi wire and measures the resulting displacement due to the martensite to austenite phase transformation. The electric pulse is tuned to produce variable temperature jump of up to 160°C within a risetime of few microseconds. One end of the wire is clamped while the displacement of the other end is monitored both by a laser doppler vibrometer and by an optical encoder that measures the displacement of a grating device. Analysis of experimental results reveals a dead time delay between the electric pulse and the wire's response, which is attributed to the austenite nucleation time and which determines the limit on the fastest possible shape memory actuation. Further analysis reveals relations between the dead weight used and the average acceleration and maximal velocity obtained. In particular, the maximal velocity correlates to a constant kinetic energy delivered by the wire, which suggests a constant integrand over the stress-strain curve regardless of the dead-weight used. A comparison of actuation performances demonstrates that our actuation experiments are significantly advantageous over other fast actuation methods in almost every actuation aspect reviewed. This demonstrates the great potential of SMA for applications that require high speeds and large displacements oneoccasional actuation.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/24837933" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="e2e04289bb53cb40559760b51952f2a3" rel="nofollow" data-download="{"attachment_id":45162211,"asset_id":24837933,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/45162211/download_file?st=MTc0MDg3MDkxOSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="47890741" href="https://independent.academia.edu/DShilo">D. Shilo</a><script data-card-contents-for-user="47890741" type="text/json">{"id":47890741,"first_name":"D.","last_name":"Shilo","domain_name":"independent","page_name":"DShilo","display_name":"D. Shilo","profile_url":"https://independent.academia.edu/DShilo?f_ri=1010378","photo":"/images/s65_no_pic.png"}</script></span></span></li><li class="js-paper-rank-work_24837933 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="24837933"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 24837933, container: ".js-paper-rank-work_24837933", }); });</script></li><li class="js-percentile-work_24837933 InlineList-item InlineList-item--bordered hidden u-tcGrayDark"><span class="percentile-widget hidden"><span class="u-mr2x percentile-widget" style="display: none">•</span><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 24837933; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-percentile-work_24837933"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></li><li class="js-view-count-work_24837933 InlineList-item InlineList-item--bordered hidden"><div><span><span class="js-view-count view-count u-mr2x" data-work-id="24837933"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 24837933; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=24837933]").text(description); $(".js-view-count-work_24837933").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_24837933").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="24837933"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">15</a>  </div><span class="InlineList-item-text u-textTruncate u-pl10x"><a class="InlineList-item-text" data-has-card-for-ri="60" rel="nofollow" href="https://www.academia.edu/Documents/in/Mechanical_Engineering">Mechanical Engineering</a>, <script data-card-contents-for-ri="60" type="text/json">{"id":60,"name":"Mechanical Engineering","url":"https://www.academia.edu/Documents/in/Mechanical_Engineering?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="73" rel="nofollow" href="https://www.academia.edu/Documents/in/Civil_Engineering">Civil Engineering</a>, <script data-card-contents-for-ri="73" type="text/json">{"id":73,"name":"Civil Engineering","url":"https://www.academia.edu/Documents/in/Civil_Engineering?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="9732" rel="nofollow" href="https://www.academia.edu/Documents/in/Experimental_Mechanics">Experimental Mechanics</a>, <script data-card-contents-for-ri="9732" type="text/json">{"id":9732,"name":"Experimental Mechanics","url":"https://www.academia.edu/Documents/in/Experimental_Mechanics?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="48459" rel="nofollow" href="https://www.academia.edu/Documents/in/High_Voltage">High Voltage</a><script data-card-contents-for-ri="48459" type="text/json">{"id":48459,"name":"High Voltage","url":"https://www.academia.edu/Documents/in/High_Voltage?f_ri=1010378","nofollow":true}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=24837933]'), work: {"id":24837933,"title":"The Mechanical Response of Shape Memory Alloys Under a Rapid Heating Pulse","created_at":"2016-04-28T02:41:41.952-07:00","url":"https://www.academia.edu/24837933/The_Mechanical_Response_of_Shape_Memory_Alloys_Under_a_Rapid_Heating_Pulse?f_ri=1010378","dom_id":"work_24837933","summary":"Shape memory alloy (SMA) actuators are very promising due to their large strain and work-output, but are considered to be very slow due to their cooling rate. In this article, we explore the capabilities of a fast one-directional actuation mode based on one-occasional rapid Joule heating of SMA elements. For this purpose, a unique experimental system has been developed that applies a high-voltage electric pulse to a detwined NiTi wire and measures the resulting displacement due to the martensite to austenite phase transformation. The electric pulse is tuned to produce variable temperature jump of up to 160°C within a risetime of few microseconds. One end of the wire is clamped while the displacement of the other end is monitored both by a laser doppler vibrometer and by an optical encoder that measures the displacement of a grating device. Analysis of experimental results reveals a dead time delay between the electric pulse and the wire's response, which is attributed to the austenite nucleation time and which determines the limit on the fastest possible shape memory actuation. Further analysis reveals relations between the dead weight used and the average acceleration and maximal velocity obtained. In particular, the maximal velocity correlates to a constant kinetic energy delivered by the wire, which suggests a constant integrand over the stress-strain curve regardless of the dead-weight used. A comparison of actuation performances demonstrates that our actuation experiments are significantly advantageous over other fast actuation methods in almost every actuation aspect reviewed. This demonstrates the great potential of SMA for applications that require high speeds and large displacements oneoccasional actuation.","downloadable_attachments":[{"id":45162211,"asset_id":24837933,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":47890741,"first_name":"D.","last_name":"Shilo","domain_name":"independent","page_name":"DShilo","display_name":"D. Shilo","profile_url":"https://independent.academia.edu/DShilo?f_ri=1010378","photo":"/images/s65_no_pic.png"}],"research_interests":[{"id":60,"name":"Mechanical Engineering","url":"https://www.academia.edu/Documents/in/Mechanical_Engineering?f_ri=1010378","nofollow":true},{"id":73,"name":"Civil Engineering","url":"https://www.academia.edu/Documents/in/Civil_Engineering?f_ri=1010378","nofollow":true},{"id":9732,"name":"Experimental Mechanics","url":"https://www.academia.edu/Documents/in/Experimental_Mechanics?f_ri=1010378","nofollow":true},{"id":48459,"name":"High Voltage","url":"https://www.academia.edu/Documents/in/High_Voltage?f_ri=1010378","nofollow":true},{"id":132592,"name":"Time Delay","url":"https://www.academia.edu/Documents/in/Time_Delay?f_ri=1010378"},{"id":147636,"name":"Cooling Rate","url":"https://www.academia.edu/Documents/in/Cooling_Rate?f_ri=1010378"},{"id":193501,"name":"Shape Memory Alloy","url":"https://www.academia.edu/Documents/in/Shape_Memory_Alloy?f_ri=1010378"},{"id":308420,"name":"Phase Transformation","url":"https://www.academia.edu/Documents/in/Phase_Transformation?f_ri=1010378"},{"id":317745,"name":"High Speed","url":"https://www.academia.edu/Documents/in/High_Speed?f_ri=1010378"},{"id":413295,"name":"Kinetic Energy","url":"https://www.academia.edu/Documents/in/Kinetic_Energy?f_ri=1010378"},{"id":527921,"name":"Joule heating","url":"https://www.academia.edu/Documents/in/Joule_heating?f_ri=1010378"},{"id":547891,"name":"Shape Memory","url":"https://www.academia.edu/Documents/in/Shape_Memory?f_ri=1010378"},{"id":554780,"name":"Interdisciplinary Engineering","url":"https://www.academia.edu/Documents/in/Interdisciplinary_Engineering?f_ri=1010378"},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378"},{"id":1879294,"name":"Large Strain","url":"https://www.academia.edu/Documents/in/Large_Strain?f_ri=1010378"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_22653049" data-work_id="22653049" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/22653049/Medium_characterization_from_interface_wave_impedance_and_ellipticity_using_simultaneous_displacement_and_pressure_measurements">Medium characterization from interface-wave impedance and ellipticity using simultaneous displacement and pressure measurements</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">The interface-wave impedance and ellipticity are wave attributes that interrelate the full waveforms as observed in different components. For each of the fluid/elastic-solid interface waves, i.e., the pseudo-Rayleigh (pR) and Stoneley... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_22653049" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">The interface-wave impedance and ellipticity are wave attributes that interrelate the full waveforms as observed in different components. For each of the fluid/elastic-solid interface waves, i.e., the pseudo-Rayleigh (pR) and Stoneley (St) waves, the impedance and ellipticity are found to have different functional dependencies on Young's modulus and Poisson's ratio. By combining the attributes in a cost function, unique and stable estimates of these parameters can be obtained, particularly when using the St wave. In a validation experiment, the impedance of the laser-excited pR wave is successfully extracted from simultaneous measurements of the normal particle displacement and the fluid pressure at a water/aluminum interface. The displacement is measured using a laser Doppler vibrometer (LDV) and the pressure with a needle hydrophone. Any LDV measurement is perturbed by refractive-index changes along the LDV beam once acoustic waves interfere with the beam. Using a model that accounts for these perturbations, an impedance decrease of 28% with respect to the plane wave impedance of the pR wave is predicted for the water/aluminum configuration. Although this deviation is different for the experimentally extracted impedance, there is excellent agreement between the observed and predicted pR waveforms in both the particle displacement and fluid pressure.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/22653049" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="a0391e6dac7d3fc49dc6ca8a58d5f456" rel="nofollow" data-download="{"attachment_id":43243920,"asset_id":22653049,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/43243920/download_file?st=MTc0MDg3MDkxOSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="44235389" href="https://independent.academia.edu/DSmeulders">D. 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For each of the fluid/elastic-solid interface waves, i.e., the pseudo-Rayleigh (pR) and Stoneley (St) waves, the impedance and ellipticity are found to have different functional dependencies on Young's modulus and Poisson's ratio. By combining the attributes in a cost function, unique and stable estimates of these parameters can be obtained, particularly when using the St wave. In a validation experiment, the impedance of the laser-excited pR wave is successfully extracted from simultaneous measurements of the normal particle displacement and the fluid pressure at a water/aluminum interface. The displacement is measured using a laser Doppler vibrometer (LDV) and the pressure with a needle hydrophone. Any LDV measurement is perturbed by refractive-index changes along the LDV beam once acoustic waves interfere with the beam. Using a model that accounts for these perturbations, an impedance decrease of 28% with respect to the plane wave impedance of the pR wave is predicted for the water/aluminum configuration. Although this deviation is different for the experimentally extracted impedance, there is excellent agreement between the observed and predicted pR waveforms in both the particle displacement and fluid pressure.","downloadable_attachments":[{"id":43243920,"asset_id":22653049,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":44235389,"first_name":"D.","last_name":"Smeulders","domain_name":"independent","page_name":"DSmeulders","display_name":"D. Smeulders","profile_url":"https://independent.academia.edu/DSmeulders?f_ri=1010378","photo":"/images/s65_no_pic.png"}],"research_interests":[{"id":8088,"name":"Sound","url":"https://www.academia.edu/Documents/in/Sound?f_ri=1010378","nofollow":true},{"id":23077,"name":"Vibration","url":"https://www.academia.edu/Documents/in/Vibration?f_ri=1010378","nofollow":true},{"id":28235,"name":"Multidisciplinary","url":"https://www.academia.edu/Documents/in/Multidisciplinary?f_ri=1010378","nofollow":true},{"id":58906,"name":"Fourier Analysis","url":"https://www.academia.edu/Documents/in/Fourier_Analysis?f_ri=1010378","nofollow":true},{"id":69542,"name":"Computer Simulation","url":"https://www.academia.edu/Documents/in/Computer_Simulation?f_ri=1010378"},{"id":80221,"name":"Lasers","url":"https://www.academia.edu/Documents/in/Lasers?f_ri=1010378"},{"id":100540,"name":"Feasibility Studies","url":"https://www.academia.edu/Documents/in/Feasibility_Studies?f_ri=1010378"},{"id":118812,"name":"Ultrasonics","url":"https://www.academia.edu/Documents/in/Ultrasonics?f_ri=1010378"},{"id":151141,"name":"Refractive Index","url":"https://www.academia.edu/Documents/in/Refractive_Index?f_ri=1010378"},{"id":198527,"name":"Motion","url":"https://www.academia.edu/Documents/in/Motion?f_ri=1010378"},{"id":291038,"name":"Pressure","url":"https://www.academia.edu/Documents/in/Pressure?f_ri=1010378"},{"id":343667,"name":"Theoretical Models","url":"https://www.academia.edu/Documents/in/Theoretical_Models?f_ri=1010378"},{"id":413195,"name":"Time Factors","url":"https://www.academia.edu/Documents/in/Time_Factors?f_ri=1010378"},{"id":521099,"name":"Doppler effect","url":"https://www.academia.edu/Documents/in/Doppler_effect?f_ri=1010378"},{"id":549280,"name":"Reproducibility of Results","url":"https://www.academia.edu/Documents/in/Reproducibility_of_Results?f_ri=1010378"},{"id":586110,"name":"Elastic Modulus","url":"https://www.academia.edu/Documents/in/Elastic_Modulus?f_ri=1010378"},{"id":951488,"name":"Rayleigh Waves","url":"https://www.academia.edu/Documents/in/Rayleigh_Waves?f_ri=1010378"},{"id":1003508,"name":"Cost Function","url":"https://www.academia.edu/Documents/in/Cost_Function?f_ri=1010378"},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378"},{"id":1157199,"name":"Pressure Measurement","url":"https://www.academia.edu/Documents/in/Pressure_Measurement?f_ri=1010378"},{"id":1387383,"name":"Acoustic Waves","url":"https://www.academia.edu/Documents/in/Acoustic_Waves?f_ri=1010378"},{"id":1969166,"name":"Functional Dependency","url":"https://www.academia.edu/Documents/in/Functional_Dependency?f_ri=1010378"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_20836753" data-work_id="20836753" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/20836753/Investigation_of_the_phase_velocities_of_guided_acoustic_waves_in_soft_porous_layers">Investigation of the phase velocities of guided acoustic waves in soft porous layers</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">A new experimental method for measuring the phase velocities of guided acoustic waves in soft poroelastic or poroviscoelastic plates is proposed. The method is based on the generation of standing waves in the material and on the spatial... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_20836753" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">A new experimental method for measuring the phase velocities of guided acoustic waves in soft poroelastic or poroviscoelastic plates is proposed. The method is based on the generation of standing waves in the material and on the spatial Fourier transform of the displacement profile of the upper surface. The plate is glued on a rigid substrate so that it has a free upper surface and a nonmoving lower surface. The displacement is measured with a laser Doppler vibrometer along a line corresponding to the direction of propagation of plane surface waves. A continuous sine with varying frequencies was chosen as excitation signal to maximize the precision of the measurements. The spatial Fourier transform provides the wave numbers, and the phase velocities are obtained from the relationship between wave number and frequency. The phase velocities of several guided modes could be measured in a highly porous foam saturated by air. The modes were also studied theoretically and, from the theoretical results, the experimental results, and a fitting procedure, it was possible to determine the frequency behavior of the complex shear modulus and of the complex Poisson ratio from 200 Hz to 1.4 kHz, in a frequency range higher than the traditional methods.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/20836753" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="2cf8cc65c9eeadec18ea6616f5ece3dd" rel="nofollow" data-download="{"attachment_id":42367691,"asset_id":20836753,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/42367691/download_file?st=MTc0MDg3MDkxOSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="42137316" href="https://independent.academia.edu/PLeclaire">P. 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The method is based on the generation of standing waves in the material and on the spatial Fourier transform of the displacement profile of the upper surface. The plate is glued on a rigid substrate so that it has a free upper surface and a nonmoving lower surface. The displacement is measured with a laser Doppler vibrometer along a line corresponding to the direction of propagation of plane surface waves. A continuous sine with varying frequencies was chosen as excitation signal to maximize the precision of the measurements. The spatial Fourier transform provides the wave numbers, and the phase velocities are obtained from the relationship between wave number and frequency. The phase velocities of several guided modes could be measured in a highly porous foam saturated by air. The modes were also studied theoretically and, from the theoretical results, the experimental results, and a fitting procedure, it was possible to determine the frequency behavior of the complex shear modulus and of the complex Poisson ratio from 200 Hz to 1.4 kHz, in a frequency range higher than the traditional methods.","downloadable_attachments":[{"id":42367691,"asset_id":20836753,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":42137316,"first_name":"P.","last_name":"Leclaire","domain_name":"independent","page_name":"PLeclaire","display_name":"P. Leclaire","profile_url":"https://independent.academia.edu/PLeclaire?f_ri=1010378","photo":"/images/s65_no_pic.png"}],"research_interests":[{"id":28235,"name":"Multidisciplinary","url":"https://www.academia.edu/Documents/in/Multidisciplinary?f_ri=1010378","nofollow":true},{"id":390056,"name":"Fourier transform","url":"https://www.academia.edu/Documents/in/Fourier_transform?f_ri=1010378","nofollow":true},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378","nofollow":true},{"id":1160343,"name":"Shear Modulus","url":"https://www.academia.edu/Documents/in/Shear_Modulus?f_ri=1010378","nofollow":true},{"id":1247851,"name":"Experimental Method","url":"https://www.academia.edu/Documents/in/Experimental_Method?f_ri=1010378"},{"id":1387383,"name":"Acoustic Waves","url":"https://www.academia.edu/Documents/in/Acoustic_Waves?f_ri=1010378"},{"id":1713105,"name":"Surface Wave","url":"https://www.academia.edu/Documents/in/Surface_Wave?f_ri=1010378"},{"id":2129289,"name":"The The","url":"https://www.academia.edu/Documents/in/The_The?f_ri=1010378"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_18169090" data-work_id="18169090" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/18169090/Laser_Doppler_Vibrometry_system_using_the_synthetic_heterodyne_interferometric_demodulation_scheme_implemented_on_a_CMOS_DSP_camera">Laser Doppler Vibrometry system using the synthetic-heterodyne interferometric demodulation scheme implemented on a CMOS DSP camera</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">A Laser Doppler Vibrometer (LDV) is described which uses a CMOS digital camera, incorporating a digital signal processor, to carry out real-time signal processing of the interferometer output to allow multipoint LDV to be implemented. The... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_18169090" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">A Laser Doppler Vibrometer (LDV) is described which uses a CMOS digital camera, incorporating a digital signal processor, to carry out real-time signal processing of the interferometer output to allow multipoint LDV to be implemented. The synthetic-heterodyne technique is used to overcome the interferometric fading effect due to slow environmental changes. Vibration frequencies up to 100 Hz were detected successfully.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/18169090" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="4a8b2be434d9004e7f24c973c787cc49" rel="nofollow" data-download="{"attachment_id":39912627,"asset_id":18169090,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/39912627/download_file?st=MTc0MDg3MDkxOSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="38141992" href="https://independent.academia.edu/PSzecowka">P. 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The synthetic-heterodyne technique is used to overcome the interferometric fading effect due to slow environmental changes. Vibration frequencies up to 100 Hz were detected successfully.","downloadable_attachments":[{"id":39912627,"asset_id":18169090,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":38141992,"first_name":"P.","last_name":"Szecowka","domain_name":"independent","page_name":"PSzecowka","display_name":"P. 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In metal cutting as a result of... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_1581534" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">In automated manufacturing systems, one of the most important issues is accurate detection of the tool conditions under given cutting conditions so that worn tools can be identified and replaced in time. In metal cutting as a result of the cutting motion, the surface of workpiece will be influenced by cutting parameters, cutting force, and vibrations, etc. But the effects of vibrations have been paid less attention. In the present paper, an investigation is presented of a tool condition monitoring system, which consists of a fast Fourier transform preprocessor for generating features from an online acousto-optic emission (AOE) signals to develop a database for appropriate decisions. A fast Fourier transform (FFT) can decompose AOE signals into different frequency bands in the time domain. Present work uses a laser Doppler vibrometer for online data acquisition and a high-speed FFT analyser used to process the AOE signals. The generation of the AOE signals directly in the cutting zone makes them very sensitive to changes in the cutting process due to vibrations. AOE techniques is a relatively recent entry into the field of tool condition monitoring. This method has also been widely used in the field of metal cutting to detect process changes like displacement due to vibration and tool wear, etc. In this research work the results obtained from the analysis of acousto-optic emission sensor employs to predict flank wear in turning of AISI 1040 steel of 150 BHN hardness using Carbide insert and HSS tools. The correlation between the tool wear and AOE parameters is analyzed using the experimental study conducted in 16 H.P. all geared lathe. The encouraging results of the work pave the way for the development of a real-time, low-cost, and reliable tool condition monitoring system. A high degree of correlation is established between the results of the AOE signal and experimental results in identification of tool wear state.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/1581534" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="a5e3fc8c02c7121246712c30d6ffadc3" rel="nofollow" data-download="{"attachment_id":50921084,"asset_id":1581534,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/50921084/download_file?st=MTc0MDg3MDkxOSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="905183" href="https://gitam.academia.edu/DrBallaSrinivasaPrasad">Balla Prasad</a><script data-card-contents-for-user="905183" type="text/json">{"id":905183,"first_name":"Balla","last_name":"Prasad","domain_name":"gitam","page_name":"DrBallaSrinivasaPrasad","display_name":"Balla Prasad","profile_url":"https://gitam.academia.edu/DrBallaSrinivasaPrasad?f_ri=1010378","photo":"https://0.academia-photos.com/905183/334193/396611/s65_balla.prasad.jpg"}</script></span></span></li><li class="js-paper-rank-work_1581534 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="1581534"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 1581534, container: ".js-paper-rank-work_1581534", }); 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In metal cutting as a result of the cutting motion, the surface of workpiece will be influenced by cutting parameters, cutting force, and vibrations, etc. But the effects of vibrations have been paid less attention. In the present paper, an investigation is presented of a tool condition monitoring system, which consists of a fast Fourier transform preprocessor for generating features from an online acousto-optic emission (AOE) signals to develop a database for appropriate decisions. A fast Fourier transform (FFT) can decompose AOE signals into different frequency bands in the time domain. Present work uses a laser Doppler vibrometer for online data acquisition and a high-speed FFT analyser used to process the AOE signals. The generation of the AOE signals directly in the cutting zone makes them very sensitive to changes in the cutting process due to vibrations. AOE techniques is a relatively recent entry into the field of tool condition monitoring. This method has also been widely used in the field of metal cutting to detect process changes like displacement due to vibration and tool wear, etc. In this research work the results obtained from the analysis of acousto-optic emission sensor employs to predict flank wear in turning of AISI 1040 steel of 150 BHN hardness using Carbide insert and HSS tools. The correlation between the tool wear and AOE parameters is analyzed using the experimental study conducted in 16 H.P. all geared lathe. The encouraging results of the work pave the way for the development of a real-time, low-cost, and reliable tool condition monitoring system. A high degree of correlation is established between the results of the AOE signal and experimental results in identification of tool wear state.","downloadable_attachments":[{"id":50921084,"asset_id":1581534,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":905183,"first_name":"Balla","last_name":"Prasad","domain_name":"gitam","page_name":"DrBallaSrinivasaPrasad","display_name":"Balla Prasad","profile_url":"https://gitam.academia.edu/DrBallaSrinivasaPrasad?f_ri=1010378","photo":"https://0.academia-photos.com/905183/334193/396611/s65_balla.prasad.jpg"}],"research_interests":[{"id":48,"name":"Engineering","url":"https://www.academia.edu/Documents/in/Engineering?f_ri=1010378","nofollow":true},{"id":2141,"name":"Signal Processing","url":"https://www.academia.edu/Documents/in/Signal_Processing?f_ri=1010378","nofollow":true},{"id":11900,"name":"Condition Monitoring","url":"https://www.academia.edu/Documents/in/Condition_Monitoring?f_ri=1010378","nofollow":true},{"id":80414,"name":"Mathematical Sciences","url":"https://www.academia.edu/Documents/in/Mathematical_Sciences?f_ri=1010378","nofollow":true},{"id":102115,"name":"Tool wear","url":"https://www.academia.edu/Documents/in/Tool_wear?f_ri=1010378"},{"id":104336,"name":"Data acquisition","url":"https://www.academia.edu/Documents/in/Data_acquisition?f_ri=1010378"},{"id":206904,"name":"Advanced manufacturing technology","url":"https://www.academia.edu/Documents/in/Advanced_manufacturing_technology?f_ri=1010378"},{"id":215075,"name":"Experimental Study","url":"https://www.academia.edu/Documents/in/Experimental_Study?f_ri=1010378"},{"id":229390,"name":"Real Time","url":"https://www.academia.edu/Documents/in/Real_Time?f_ri=1010378"},{"id":317745,"name":"High Speed","url":"https://www.academia.edu/Documents/in/High_Speed?f_ri=1010378"},{"id":357048,"name":"Cutting Force","url":"https://www.academia.edu/Documents/in/Cutting_Force?f_ri=1010378"},{"id":588226,"name":"Fast Fourier Transform","url":"https://www.academia.edu/Documents/in/Fast_Fourier_Transform?f_ri=1010378"},{"id":623396,"name":"Manufacturing System","url":"https://www.academia.edu/Documents/in/Manufacturing_System?f_ri=1010378"},{"id":991005,"name":"Time Domain","url":"https://www.academia.edu/Documents/in/Time_Domain?f_ri=1010378"},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_23538066" data-work_id="23538066" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/23538066/Broadband_generation_of_ultrasonic_guided_waves_using_piezoceramics_and_sub_band_decomposition">Broadband generation of ultrasonic guided waves using piezoceramics and sub-band decomposition</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">Classically, damage detection or dispersion curve determination using piezoceramic-generated guided waves has been based on analysis of propagation properties of multiple narrowband excitation signals. However, dispersion and multimodal... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_23538066" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">Classically, damage detection or dispersion curve determination using piezoceramic-generated guided waves has been based on analysis of propagation properties of multiple narrowband excitation signals. However, dispersion and multimodal propagation impair the determination of propagation properties. More recently, it has been proposed to consider broadband excitations for both damage imaging and group velocity estimation. Among existing transducer technologies, although laser excitation is prone to practical limitations in terms of dimensions and generated amplitudes, it allows generation of noncontact, point-like broadband displacement. Thus, broadband generation of guided waves using piezoceramics can be envisioned. However, direct impulse response measurements are limited by the generated amplitude, leading to low SNR measurements. For this purpose, chirp excitations have been proposed using variable-frequency bursts, leading to phase and amplitude variations with respect to the frequency, such that this approach is not suitable for precise estimation of time of flight (ToF) or modal amplitude. In this paper, a sub-band decomposition technique that allows high-SNR measurements of impulse response in a given frequency range is proposed. Broadband excitation is decomposed over a given number of frequency sub-bands, generated by a piezoceramic element and measurement is performed using a laser Doppler vibrometer (LDV) or a piezoceramic sensor. Application to experimental estimation of group velocity and damage detection in pitchcatch configuration is proposed. It is shown that the proposed method allows damage estimation without a priori knowledge of the damage size, whereas narrowband techniques can fail at specific wavelengths.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/23538066" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="769e0fa4d25128ea2969bb8b0ad39503" rel="nofollow" data-download="{"attachment_id":43969229,"asset_id":23538066,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/43969229/download_file?st=MTc0MDg3MDkxOSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="34914235" href="https://independent.academia.edu/PhilippeMicheau">Philippe Micheau</a><script data-card-contents-for-user="34914235" type="text/json">{"id":34914235,"first_name":"Philippe","last_name":"Micheau","domain_name":"independent","page_name":"PhilippeMicheau","display_name":"Philippe Micheau","profile_url":"https://independent.academia.edu/PhilippeMicheau?f_ri=1010378","photo":"/images/s65_no_pic.png"}</script></span></span></li><li class="js-paper-rank-work_23538066 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="23538066"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 23538066, container: ".js-paper-rank-work_23538066", }); 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$(".js-view-count[data-work-id=23538066]").text(description); $(".js-view-count-work_23538066").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_23538066").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="23538066"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">15</a>  </div><span class="InlineList-item-text u-textTruncate u-pl10x"><a class="InlineList-item-text" data-has-card-for-ri="48" rel="nofollow" href="https://www.academia.edu/Documents/in/Engineering">Engineering</a>, <script data-card-contents-for-ri="48" type="text/json">{"id":48,"name":"Engineering","url":"https://www.academia.edu/Documents/in/Engineering?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="9212" rel="nofollow" href="https://www.academia.edu/Documents/in/A_Priori_Knowledge">A Priori Knowledge</a>, <script data-card-contents-for-ri="9212" type="text/json">{"id":9212,"name":"A Priori Knowledge","url":"https://www.academia.edu/Documents/in/A_Priori_Knowledge?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="14108" rel="nofollow" href="https://www.academia.edu/Documents/in/Damage_detection">Damage detection</a>, <script data-card-contents-for-ri="14108" type="text/json">{"id":14108,"name":"Damage detection","url":"https://www.academia.edu/Documents/in/Damage_detection?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="57608" rel="nofollow" href="https://www.academia.edu/Documents/in/Dispersion">Dispersion</a><script data-card-contents-for-ri="57608" type="text/json">{"id":57608,"name":"Dispersion","url":"https://www.academia.edu/Documents/in/Dispersion?f_ri=1010378","nofollow":true}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=23538066]'), work: {"id":23538066,"title":"Broadband generation of ultrasonic guided waves using piezoceramics and sub-band decomposition","created_at":"2016-03-21T17:29:51.002-07:00","url":"https://www.academia.edu/23538066/Broadband_generation_of_ultrasonic_guided_waves_using_piezoceramics_and_sub_band_decomposition?f_ri=1010378","dom_id":"work_23538066","summary":"Classically, damage detection or dispersion curve determination using piezoceramic-generated guided waves has been based on analysis of propagation properties of multiple narrowband excitation signals. However, dispersion and multimodal propagation impair the determination of propagation properties. More recently, it has been proposed to consider broadband excitations for both damage imaging and group velocity estimation. Among existing transducer technologies, although laser excitation is prone to practical limitations in terms of dimensions and generated amplitudes, it allows generation of noncontact, point-like broadband displacement. Thus, broadband generation of guided waves using piezoceramics can be envisioned. However, direct impulse response measurements are limited by the generated amplitude, leading to low SNR measurements. For this purpose, chirp excitations have been proposed using variable-frequency bursts, leading to phase and amplitude variations with respect to the frequency, such that this approach is not suitable for precise estimation of time of flight (ToF) or modal amplitude. In this paper, a sub-band decomposition technique that allows high-SNR measurements of impulse response in a given frequency range is proposed. Broadband excitation is decomposed over a given number of frequency sub-bands, generated by a piezoceramic element and measurement is performed using a laser Doppler vibrometer (LDV) or a piezoceramic sensor. Application to experimental estimation of group velocity and damage detection in pitchcatch configuration is proposed. It is shown that the proposed method allows damage estimation without a priori knowledge of the damage size, whereas narrowband techniques can fail at specific wavelengths.","downloadable_attachments":[{"id":43969229,"asset_id":23538066,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":34914235,"first_name":"Philippe","last_name":"Micheau","domain_name":"independent","page_name":"PhilippeMicheau","display_name":"Philippe Micheau","profile_url":"https://independent.academia.edu/PhilippeMicheau?f_ri=1010378","photo":"/images/s65_no_pic.png"}],"research_interests":[{"id":48,"name":"Engineering","url":"https://www.academia.edu/Documents/in/Engineering?f_ri=1010378","nofollow":true},{"id":9212,"name":"A Priori Knowledge","url":"https://www.academia.edu/Documents/in/A_Priori_Knowledge?f_ri=1010378","nofollow":true},{"id":14108,"name":"Damage detection","url":"https://www.academia.edu/Documents/in/Damage_detection?f_ri=1010378","nofollow":true},{"id":57608,"name":"Dispersion","url":"https://www.academia.edu/Documents/in/Dispersion?f_ri=1010378","nofollow":true},{"id":85363,"name":"Impulse response","url":"https://www.academia.edu/Documents/in/Impulse_response?f_ri=1010378"},{"id":105088,"name":"Piezoelectric material","url":"https://www.academia.edu/Documents/in/Piezoelectric_material?f_ri=1010378"},{"id":112619,"name":"Time of Flight","url":"https://www.academia.edu/Documents/in/Time_of_Flight?f_ri=1010378"},{"id":118582,"name":"Physical sciences","url":"https://www.academia.edu/Documents/in/Physical_sciences?f_ri=1010378"},{"id":132898,"name":"Estimation","url":"https://www.academia.edu/Documents/in/Estimation?f_ri=1010378"},{"id":205509,"name":"Time Frequency Analysis","url":"https://www.academia.edu/Documents/in/Time_Frequency_Analysis?f_ri=1010378"},{"id":261044,"name":"Acoustic Noise","url":"https://www.academia.edu/Documents/in/Acoustic_Noise?f_ri=1010378"},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378"},{"id":1300470,"name":"Guided Wave","url":"https://www.academia.edu/Documents/in/Guided_Wave?f_ri=1010378"},{"id":1929660,"name":"Broadband Communication","url":"https://www.academia.edu/Documents/in/Broadband_Communication?f_ri=1010378"},{"id":1930751,"name":"Phase variation","url":"https://www.academia.edu/Documents/in/Phase_variation?f_ri=1010378"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_28738632 coauthored" data-work_id="28738632" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/28738632/Measurement_of_Normal_and_Oblique_Incidence_Absorption_Coefficients_Using_a_Scanning_Laser_Doppler_Vibrometer">Measurement of Normal and Oblique Incidence Absorption Coefficients Using a Scanning Laser Doppler Vibrometer</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">Different well accepted standardized test methods exist to estimate absorption coefficients of acoustical materials from experiments. The most widespread technique uses the so-called Kundt&#39;s tube. This method clearly has its... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_28738632" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">Different well accepted standardized test methods exist to estimate absorption coefficients of acoustical materials from experiments. The most widespread technique uses the so-called Kundt&#39;s tube. This method clearly has its limitations since both the upper and lower frequencies are limited by the diameter and length of the used tube. Another standardised method uses the comparison of the reverberation times measured in a reverberation room respectively with and without a specimen of the tested material. The needed specimens and the experimental facilities required to perform this test, are not always available. In this paper we will present a method to estimate absorption coefficients from optical measurements of the incident and reflected sound fields near the material under test. The sound fields are visualised using a scanning laser Doppler vibrometer (SLDV). Two alternative set-ups are proposed: a one-dimensional set-up where the sound field (standing waves) inside a thin g...</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/28738632" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="2ac00c53d06d9b96bb83271e7a55a124" rel="nofollow" data-download="{"attachment_id":49150453,"asset_id":28738632,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/49150453/download_file?st=MTc0MDg3MDkxOSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="54076695" href="https://independent.academia.edu/JorisVanherzeele">Joris Vanherzeele</a><script data-card-contents-for-user="54076695" type="text/json">{"id":54076695,"first_name":"Joris","last_name":"Vanherzeele","domain_name":"independent","page_name":"JorisVanherzeele","display_name":"Joris Vanherzeele","profile_url":"https://independent.academia.edu/JorisVanherzeele?f_ri=1010378","photo":"/images/s65_no_pic.png"}</script></span></span><span class="u-displayInlineBlock InlineList-item-text"> and <span class="u-textDecorationUnderline u-clickable InlineList-item-text js-work-more-authors-28738632">+1</span><div class="hidden js-additional-users-28738632"><div><span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a href="https://antwerp.academia.edu/CedricVuye">Cedric Vuye</a></span></div></div></span><script>(function(){ var popoverSettings = { el: $('.js-work-more-authors-28738632'), placement: 'bottom', hide_delay: 200, html: true, content: function(){ return $('.js-additional-users-28738632').html(); 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The most widespread technique uses the so-called Kundt\u0026#39;s tube. This method clearly has its limitations since both the upper and lower frequencies are limited by the diameter and length of the used tube. Another standardised method uses the comparison of the reverberation times measured in a reverberation room respectively with and without a specimen of the tested material. The needed specimens and the experimental facilities required to perform this test, are not always available. In this paper we will present a method to estimate absorption coefficients from optical measurements of the incident and reflected sound fields near the material under test. The sound fields are visualised using a scanning laser Doppler vibrometer (SLDV). Two alternative set-ups are proposed: a one-dimensional set-up where the sound field (standing waves) inside a thin g...","downloadable_attachments":[{"id":49150453,"asset_id":28738632,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":54076695,"first_name":"Joris","last_name":"Vanherzeele","domain_name":"independent","page_name":"JorisVanherzeele","display_name":"Joris Vanherzeele","profile_url":"https://independent.academia.edu/JorisVanherzeele?f_ri=1010378","photo":"/images/s65_no_pic.png"},{"id":26544810,"first_name":"Cedric","last_name":"Vuye","domain_name":"antwerp","page_name":"CedricVuye","display_name":"Cedric Vuye","profile_url":"https://antwerp.academia.edu/CedricVuye?f_ri=1010378","photo":"/images/s65_no_pic.png"}],"research_interests":[{"id":48458,"name":"High Frequency","url":"https://www.academia.edu/Documents/in/High_Frequency?f_ri=1010378","nofollow":true},{"id":145675,"name":"Standardisation","url":"https://www.academia.edu/Documents/in/Standardisation?f_ri=1010378","nofollow":true},{"id":306975,"name":"Reverberation Time","url":"https://www.academia.edu/Documents/in/Reverberation_Time?f_ri=1010378","nofollow":true},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378","nofollow":true},{"id":1387383,"name":"Acoustic Waves","url":"https://www.academia.edu/Documents/in/Acoustic_Waves?f_ri=1010378"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_7279773" data-work_id="7279773" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/7279773/The_electret_properties_of_two_kinds_of_poly_vinylidene_fluoride_hexafluoropropylene_copolymer_films">The electret properties of two kinds of poly(vinylidene fluoride-hexafluoropropylene) copolymer films</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">P(VDF-HFP) (poly(vinylidene fluoride-hexafluoropropylene)) copolymer is a new member of PVDF family. In this paper, the electret properties of the two kinds of casting prepared P(VDF-HFP) copolymer films whose content of HFP is 4.7% and... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_7279773" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">P(VDF-HFP) (poly(vinylidene fluoride-hexafluoropropylene)) copolymer is a new member of PVDF family. In this paper, the electret properties of the two kinds of casting prepared P(VDF-HFP) copolymer films whose content of HFP is 4.7% and 5.9% respectively were discussed with the focus on the influences of mechanically thermal stretching process and of the content of HFP on electret properties of the said copolymer. Experimental results point out that the said copolymer electret film is a polar material, i.e. there exist both oriented dipoles and deposited space charges in the film after charging. The mechanically thermal stretching process not only increases the density of oriented dipoles and deposited space charges but also improves the stability of deposited space charges; however, the increase of HFP content in the copolymer has a negative impact on the density of oriented dipoles and deposited space charges. The measurement result by means of Laser Doppler Vibrometer shows the copolymer in which the HFP content is 4.7% has a notable converse coefficient as high as 130pmNV.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/7279773" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="f74ac86467605850ab04be0ebf9eb524" rel="nofollow" data-download="{"attachment_id":48539840,"asset_id":7279773,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/48539840/download_file?st=MTc0MDg3MDkxOSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="12715070" href="https://une-au.academia.edu/FEIPENGWang">FEIPENG Wang</a><script data-card-contents-for-user="12715070" type="text/json">{"id":12715070,"first_name":"FEIPENG","last_name":"Wang","domain_name":"une-au","page_name":"FEIPENGWang","display_name":"FEIPENG Wang","profile_url":"https://une-au.academia.edu/FEIPENGWang?f_ri=1010378","photo":"/images/s65_no_pic.png"}</script></span></span></li><li class="js-paper-rank-work_7279773 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="7279773"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 7279773, container: ".js-paper-rank-work_7279773", }); });</script></li><li class="js-percentile-work_7279773 InlineList-item InlineList-item--bordered hidden u-tcGrayDark"><span class="percentile-widget hidden"><span class="u-mr2x percentile-widget" style="display: none">•</span><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 7279773; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-percentile-work_7279773"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></li><li class="js-view-count-work_7279773 InlineList-item InlineList-item--bordered hidden"><div><span><span class="js-view-count view-count u-mr2x" data-work-id="7279773"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 7279773; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=7279773]").text(description); $(".js-view-count-work_7279773").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_7279773").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="7279773"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">5</a>  </div><span class="InlineList-item-text u-textTruncate u-pl9x"><a class="InlineList-item-text" data-has-card-for-ri="29657" rel="nofollow" href="https://www.academia.edu/Documents/in/Polymer_Blends">Polymer Blends</a>, <script data-card-contents-for-ri="29657" type="text/json">{"id":29657,"name":"Polymer Blends","url":"https://www.academia.edu/Documents/in/Polymer_Blends?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="41010" rel="nofollow" href="https://www.academia.edu/Documents/in/Casting">Casting</a>, <script data-card-contents-for-ri="41010" type="text/json">{"id":41010,"name":"Casting","url":"https://www.academia.edu/Documents/in/Casting?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="762611" rel="nofollow" href="https://www.academia.edu/Documents/in/Space_Charge">Space Charge</a>, <script data-card-contents-for-ri="762611" type="text/json">{"id":762611,"name":"Space Charge","url":"https://www.academia.edu/Documents/in/Space_Charge?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="986783" rel="nofollow" href="https://www.academia.edu/Documents/in/Electrets">Electrets</a><script data-card-contents-for-ri="986783" type="text/json">{"id":986783,"name":"Electrets","url":"https://www.academia.edu/Documents/in/Electrets?f_ri=1010378","nofollow":true}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=7279773]'), work: {"id":7279773,"title":"The electret properties of two kinds of poly(vinylidene fluoride-hexafluoropropylene) copolymer films","created_at":"2014-06-06T19:02:35.906-07:00","url":"https://www.academia.edu/7279773/The_electret_properties_of_two_kinds_of_poly_vinylidene_fluoride_hexafluoropropylene_copolymer_films?f_ri=1010378","dom_id":"work_7279773","summary":"P(VDF-HFP) (poly(vinylidene fluoride-hexafluoropropylene)) copolymer is a new member of PVDF family. In this paper, the electret properties of the two kinds of casting prepared P(VDF-HFP) copolymer films whose content of HFP is 4.7% and 5.9% respectively were discussed with the focus on the influences of mechanically thermal stretching process and of the content of HFP on electret properties of the said copolymer. Experimental results point out that the said copolymer electret film is a polar material, i.e. there exist both oriented dipoles and deposited space charges in the film after charging. The mechanically thermal stretching process not only increases the density of oriented dipoles and deposited space charges but also improves the stability of deposited space charges; however, the increase of HFP content in the copolymer has a negative impact on the density of oriented dipoles and deposited space charges. The measurement result by means of Laser Doppler Vibrometer shows the copolymer in which the HFP content is 4.7% has a notable converse coefficient as high as 130pmNV.","downloadable_attachments":[{"id":48539840,"asset_id":7279773,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":12715070,"first_name":"FEIPENG","last_name":"Wang","domain_name":"une-au","page_name":"FEIPENGWang","display_name":"FEIPENG Wang","profile_url":"https://une-au.academia.edu/FEIPENGWang?f_ri=1010378","photo":"/images/s65_no_pic.png"}],"research_interests":[{"id":29657,"name":"Polymer Blends","url":"https://www.academia.edu/Documents/in/Polymer_Blends?f_ri=1010378","nofollow":true},{"id":41010,"name":"Casting","url":"https://www.academia.edu/Documents/in/Casting?f_ri=1010378","nofollow":true},{"id":762611,"name":"Space Charge","url":"https://www.academia.edu/Documents/in/Space_Charge?f_ri=1010378","nofollow":true},{"id":986783,"name":"Electrets","url":"https://www.academia.edu/Documents/in/Electrets?f_ri=1010378","nofollow":true},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_26935945" data-work_id="26935945" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/26935945/ANALOG_VELOCITY_FEEDBACK_CONTROLLER_FOR_VIBRATION_SUPPRESSION_AND_SOUND_ATTENUATION">ANALOG VELOCITY FEEDBACK CONTROLLER FOR VIBRATION SUPPRESSION AND SOUND ATTENUATION</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">In this paper, an analog velocity feedback controller is considered for active vibration suppression of a thin plate for attenuation of sound levels in the frequency range of 0-100 Hz. The active control methods can be applied to interior... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_26935945" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">In this paper, an analog velocity feedback controller is considered for active vibration suppression of a thin plate for attenuation of sound levels in the frequency range of 0-100 Hz. The active control methods can be applied to interior cavity noise reduction, as encountered for instance in automotive applications. For that purpose, a simplified experimental vibro-acoustic cabin model was built in our laboratory and developed methodologies are demonstrated on the setup. The setup includes a rectangular box (1 x 1 x 2 m) which is separated with a flexible thin plate (1 x 1 x 0.001 m) to obtain two enclosed cavities: the passenger compartment (PC) and the engine compartment (EC). The vibration control is applied only on the flexible plate since the walls enclosing the cavities are made of more rigid material (wood filled concrete). By employing piezoelectric patch as actuator and laser doppler vibrometer as vibration sensor, an analog proportional velocity feedback controller is designed and built experimentally for suppressing the low-frequency modes of the flexible plate. In order to attenuate only lower-frequency structural modes of the thin panel, pre-filters are also included in analog circuit. The vibration of thin plate and sound in the passenger compartment is measured for controller-inactive and active cases while disturbing the thin plate via shaker. By measuring vibration and sound response, closed and open loop experimental frequency responses are obtained and presented. The aim of this experimental study is to investigate performance of active vibration control applications on acoustic attenuation as the first step towards robust structural acoustic control.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/26935945" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="3ea0d54b903f4a185c08c1f21a3491af" rel="nofollow" data-download="{"attachment_id":47199742,"asset_id":26935945,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/47199742/download_file?st=MTc0MDg3MDkxOSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="40936080" href="https://wisc.academia.edu/UtkuBoz">Utku Boz</a><script data-card-contents-for-user="40936080" type="text/json">{"id":40936080,"first_name":"Utku","last_name":"Boz","domain_name":"wisc","page_name":"UtkuBoz","display_name":"Utku Boz","profile_url":"https://wisc.academia.edu/UtkuBoz?f_ri=1010378","photo":"https://0.academia-photos.com/40936080/13446032/14650940/s65_utku.boz.jpg"}</script></span></span></li><li class="js-paper-rank-work_26935945 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="26935945"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 26935945, container: ".js-paper-rank-work_26935945", }); });</script></li><li class="js-percentile-work_26935945 InlineList-item InlineList-item--bordered hidden u-tcGrayDark"><span class="percentile-widget hidden"><span class="u-mr2x percentile-widget" style="display: none">•</span><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 26935945; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-percentile-work_26935945"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></li><li class="js-view-count-work_26935945 InlineList-item InlineList-item--bordered hidden"><div><span><span class="js-view-count view-count u-mr2x" data-work-id="26935945"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 26935945; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=26935945]").text(description); $(".js-view-count-work_26935945").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_26935945").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="26935945"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">8</a>  </div><span class="InlineList-item-text u-textTruncate u-pl9x"><a class="InlineList-item-text" data-has-card-for-ri="13836" rel="nofollow" href="https://www.academia.edu/Documents/in/Vibration_Control">Vibration Control</a>, <script data-card-contents-for-ri="13836" type="text/json">{"id":13836,"name":"Vibration Control","url":"https://www.academia.edu/Documents/in/Vibration_Control?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="23018" rel="nofollow" href="https://www.academia.edu/Documents/in/Digital_Control">Digital Control</a>, <script data-card-contents-for-ri="23018" type="text/json">{"id":23018,"name":"Digital Control","url":"https://www.academia.edu/Documents/in/Digital_Control?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="88154" rel="nofollow" href="https://www.academia.edu/Documents/in/Active_noise_control">Active noise control</a>, <script data-card-contents-for-ri="88154" type="text/json">{"id":88154,"name":"Active noise control","url":"https://www.academia.edu/Documents/in/Active_noise_control?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="94423" rel="nofollow" href="https://www.academia.edu/Documents/in/Mechanical_Vibrations">Mechanical Vibrations</a><script data-card-contents-for-ri="94423" type="text/json">{"id":94423,"name":"Mechanical Vibrations","url":"https://www.academia.edu/Documents/in/Mechanical_Vibrations?f_ri=1010378","nofollow":true}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=26935945]'), work: {"id":26935945,"title":"ANALOG VELOCITY FEEDBACK CONTROLLER FOR VIBRATION SUPPRESSION AND SOUND ATTENUATION","created_at":"2016-07-12T17:01:44.420-07:00","url":"https://www.academia.edu/26935945/ANALOG_VELOCITY_FEEDBACK_CONTROLLER_FOR_VIBRATION_SUPPRESSION_AND_SOUND_ATTENUATION?f_ri=1010378","dom_id":"work_26935945","summary":"In this paper, an analog velocity feedback controller is considered for active vibration suppression of a thin plate for attenuation of sound levels in the frequency range of 0-100 Hz. The active control methods can be applied to interior cavity noise reduction, as encountered for instance in automotive applications. For that purpose, a simplified experimental vibro-acoustic cabin model was built in our laboratory and developed methodologies are demonstrated on the setup. The setup includes a rectangular box (1 x 1 x 2 m) which is separated with a flexible thin plate (1 x 1 x 0.001 m) to obtain two enclosed cavities: the passenger compartment (PC) and the engine compartment (EC). The vibration control is applied only on the flexible plate since the walls enclosing the cavities are made of more rigid material (wood filled concrete). By employing piezoelectric patch as actuator and laser doppler vibrometer as vibration sensor, an analog proportional velocity feedback controller is designed and built experimentally for suppressing the low-frequency modes of the flexible plate. In order to attenuate only lower-frequency structural modes of the thin panel, pre-filters are also included in analog circuit. The vibration of thin plate and sound in the passenger compartment is measured for controller-inactive and active cases while disturbing the thin plate via shaker. By measuring vibration and sound response, closed and open loop experimental frequency responses are obtained and presented. The aim of this experimental study is to investigate performance of active vibration control applications on acoustic attenuation as the first step towards robust structural acoustic control.","downloadable_attachments":[{"id":47199742,"asset_id":26935945,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":40936080,"first_name":"Utku","last_name":"Boz","domain_name":"wisc","page_name":"UtkuBoz","display_name":"Utku Boz","profile_url":"https://wisc.academia.edu/UtkuBoz?f_ri=1010378","photo":"https://0.academia-photos.com/40936080/13446032/14650940/s65_utku.boz.jpg"}],"research_interests":[{"id":13836,"name":"Vibration Control","url":"https://www.academia.edu/Documents/in/Vibration_Control?f_ri=1010378","nofollow":true},{"id":23018,"name":"Digital Control","url":"https://www.academia.edu/Documents/in/Digital_Control?f_ri=1010378","nofollow":true},{"id":88154,"name":"Active noise control","url":"https://www.academia.edu/Documents/in/Active_noise_control?f_ri=1010378","nofollow":true},{"id":94423,"name":"Mechanical Vibrations","url":"https://www.academia.edu/Documents/in/Mechanical_Vibrations?f_ri=1010378","nofollow":true},{"id":134884,"name":"Feedback Control","url":"https://www.academia.edu/Documents/in/Feedback_Control?f_ri=1010378"},{"id":165266,"name":"Piezoelectric Transducers","url":"https://www.academia.edu/Documents/in/Piezoelectric_Transducers?f_ri=1010378"},{"id":514360,"name":"Structural acoustics and active/passive noise and vibration cotnrol","url":"https://www.academia.edu/Documents/in/Structural_acoustics_and_active_passive_noise_and_vibration_cotnrol?f_ri=1010378"},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_28738629" data-work_id="28738629" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/28738629/Flow_characterization_using_a_laser_Doppler_vibrometer">Flow characterization using a laser Doppler vibrometer</a></div></div><div class="u-pb4x u-mt3x"></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/28738629" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="6135f426edb95c0e26bab2724c736c0f" rel="nofollow" data-download="{"attachment_id":49150449,"asset_id":28738629,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/49150449/download_file?st=MTc0MDg3MDkxOSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="54076695" href="https://independent.academia.edu/JorisVanherzeele">Joris Vanherzeele</a><script data-card-contents-for-user="54076695" type="text/json">{"id":54076695,"first_name":"Joris","last_name":"Vanherzeele","domain_name":"independent","page_name":"JorisVanherzeele","display_name":"Joris Vanherzeele","profile_url":"https://independent.academia.edu/JorisVanherzeele?f_ri=1010378","photo":"/images/s65_no_pic.png"}</script></span></span></li><li class="js-paper-rank-work_28738629 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="28738629"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 28738629, container: ".js-paper-rank-work_28738629", }); });</script></li><li class="js-percentile-work_28738629 InlineList-item InlineList-item--bordered hidden u-tcGrayDark"><span class="percentile-widget hidden"><span class="u-mr2x percentile-widget" style="display: none">•</span><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 28738629; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-percentile-work_28738629"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></li><li class="js-view-count-work_28738629 InlineList-item InlineList-item--bordered hidden"><div><span><span class="js-view-count view-count u-mr2x" data-work-id="28738629"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 28738629; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=28738629]").text(description); $(".js-view-count-work_28738629").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_28738629").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="28738629"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">7</a>  </div><span class="InlineList-item-text u-textTruncate u-pl9x"><a class="InlineList-item-text" data-has-card-for-ri="13699" rel="nofollow" href="https://www.academia.edu/Documents/in/Particle_Image_Velocimetry">Particle Image Velocimetry</a>, <script data-card-contents-for-ri="13699" type="text/json">{"id":13699,"name":"Particle Image Velocimetry","url":"https://www.academia.edu/Documents/in/Particle_Image_Velocimetry?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="91603" rel="nofollow" href="https://www.academia.edu/Documents/in/Computation_Fluid_Dynamics">Computation Fluid Dynamics</a>, <script data-card-contents-for-ri="91603" type="text/json">{"id":91603,"name":"Computation Fluid Dynamics","url":"https://www.academia.edu/Documents/in/Computation_Fluid_Dynamics?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="151141" rel="nofollow" href="https://www.academia.edu/Documents/in/Refractive_Index">Refractive Index</a>, <script data-card-contents-for-ri="151141" type="text/json">{"id":151141,"name":"Refractive Index","url":"https://www.academia.edu/Documents/in/Refractive_Index?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="263152" rel="nofollow" href="https://www.academia.edu/Documents/in/Optical_physics">Optical physics</a><script data-card-contents-for-ri="263152" type="text/json">{"id":263152,"name":"Optical physics","url":"https://www.academia.edu/Documents/in/Optical_physics?f_ri=1010378","nofollow":true}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=28738629]'), work: {"id":28738629,"title":"Flow characterization using a laser Doppler vibrometer","created_at":"2016-09-27T03:09:13.671-07:00","url":"https://www.academia.edu/28738629/Flow_characterization_using_a_laser_Doppler_vibrometer?f_ri=1010378","dom_id":"work_28738629","summary":null,"downloadable_attachments":[{"id":49150449,"asset_id":28738629,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":54076695,"first_name":"Joris","last_name":"Vanherzeele","domain_name":"independent","page_name":"JorisVanherzeele","display_name":"Joris Vanherzeele","profile_url":"https://independent.academia.edu/JorisVanherzeele?f_ri=1010378","photo":"/images/s65_no_pic.png"}],"research_interests":[{"id":13699,"name":"Particle Image Velocimetry","url":"https://www.academia.edu/Documents/in/Particle_Image_Velocimetry?f_ri=1010378","nofollow":true},{"id":91603,"name":"Computation Fluid Dynamics","url":"https://www.academia.edu/Documents/in/Computation_Fluid_Dynamics?f_ri=1010378","nofollow":true},{"id":151141,"name":"Refractive Index","url":"https://www.academia.edu/Documents/in/Refractive_Index?f_ri=1010378","nofollow":true},{"id":263152,"name":"Optical physics","url":"https://www.academia.edu/Documents/in/Optical_physics?f_ri=1010378","nofollow":true},{"id":983634,"name":"Instrument Design","url":"https://www.academia.edu/Documents/in/Instrument_Design?f_ri=1010378"},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378"},{"id":1410014,"name":"Optics and Lasers In Engineering","url":"https://www.academia.edu/Documents/in/Optics_and_Lasers_In_Engineering?f_ri=1010378"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_9051665" data-work_id="9051665" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/9051665/EFFICIENT_DETECTION_OF_LANDMINES_FROM_ACOUSTIC_IMAGES">EFFICIENT DETECTION OF LANDMINES FROM ACOUSTIC IMAGES</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">The Laser Doppler Vibrometer (LDV)-based Acoustic to Seismic (A/S) landmine detection system is one of the reliable and powerful landmine detection systems. The interpretation of the LDVbased A/S data is performed off-line, manually,... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_9051665" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">The Laser Doppler Vibrometer (LDV)-based Acoustic to Seismic (A/S) landmine detection system is one of the reliable and powerful landmine detection systems. The interpretation of the LDVbased A/S data is performed off-line, manually, depending heavily on the skills, experience, alertness and consistency of a trained operator. This takes a long time. The manually obtained results suffer from errors, particularly when dealing with large volumes of data. This paper proposes some techniques for the automatic detection of objects from the acoustic images which are obtained from the LDV-based A/S landmine detection system. These techniques are based on Corresponding author: F. E. Abd El-Samie (fathi <a href="mailto:sayed@yahoo.com" rel="nofollow">sayed@yahoo.com</a>).</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/9051665" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="e60492977a1814631277e27987a0d72a" rel="nofollow" data-download="{"attachment_id":47902450,"asset_id":9051665,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/47902450/download_file?st=MTc0MDg3MDkxOSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="20452944" href="https://independent.academia.edu/OsamaZahran">Osama Zahran</a><script data-card-contents-for-user="20452944" type="text/json">{"id":20452944,"first_name":"Osama","last_name":"Zahran","domain_name":"independent","page_name":"OsamaZahran","display_name":"Osama Zahran","profile_url":"https://independent.academia.edu/OsamaZahran?f_ri=1010378","photo":"/images/s65_no_pic.png"}</script></span></span></li><li class="js-paper-rank-work_9051665 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="9051665"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 9051665, container: ".js-paper-rank-work_9051665", }); });</script></li><li class="js-percentile-work_9051665 InlineList-item InlineList-item--bordered hidden u-tcGrayDark"><span class="percentile-widget hidden"><span class="u-mr2x percentile-widget" style="display: none">•</span><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 9051665; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-percentile-work_9051665"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></li><li class="js-view-count-work_9051665 InlineList-item InlineList-item--bordered hidden"><div><span><span class="js-view-count view-count u-mr2x" data-work-id="9051665"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 9051665; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=9051665]").text(description); $(".js-view-count-work_9051665").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_9051665").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="9051665"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">6</a>  </div><span class="InlineList-item-text u-textTruncate u-pl9x"><a class="InlineList-item-text" data-has-card-for-ri="91262" rel="nofollow" href="https://www.academia.edu/Documents/in/Wavelet_Transform">Wavelet Transform</a>, <script data-card-contents-for-ri="91262" type="text/json">{"id":91262,"name":"Wavelet Transform","url":"https://www.academia.edu/Documents/in/Wavelet_Transform?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="187345" rel="nofollow" href="https://www.academia.edu/Documents/in/Color_Image">Color Image</a>, <script data-card-contents-for-ri="187345" type="text/json">{"id":187345,"name":"Color Image","url":"https://www.academia.edu/Documents/in/Color_Image?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="238658" rel="nofollow" href="https://www.academia.edu/Documents/in/Progress">Progress</a>, <script data-card-contents-for-ri="238658" type="text/json">{"id":238658,"name":"Progress","url":"https://www.academia.edu/Documents/in/Progress?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="693726" rel="nofollow" href="https://www.academia.edu/Documents/in/Landmine_Detection">Landmine Detection</a><script data-card-contents-for-ri="693726" type="text/json">{"id":693726,"name":"Landmine Detection","url":"https://www.academia.edu/Documents/in/Landmine_Detection?f_ri=1010378","nofollow":true}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=9051665]'), work: {"id":9051665,"title":"EFFICIENT DETECTION OF LANDMINES FROM ACOUSTIC IMAGES","created_at":"2014-10-31T10:20:38.770-07:00","url":"https://www.academia.edu/9051665/EFFICIENT_DETECTION_OF_LANDMINES_FROM_ACOUSTIC_IMAGES?f_ri=1010378","dom_id":"work_9051665","summary":"The Laser Doppler Vibrometer (LDV)-based Acoustic to Seismic (A/S) landmine detection system is one of the reliable and powerful landmine detection systems. The interpretation of the LDVbased A/S data is performed off-line, manually, depending heavily on the skills, experience, alertness and consistency of a trained operator. This takes a long time. The manually obtained results suffer from errors, particularly when dealing with large volumes of data. This paper proposes some techniques for the automatic detection of objects from the acoustic images which are obtained from the LDV-based A/S landmine detection system. These techniques are based on Corresponding author: F. E. Abd El-Samie (fathi sayed@yahoo.com).","downloadable_attachments":[{"id":47902450,"asset_id":9051665,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":20452944,"first_name":"Osama","last_name":"Zahran","domain_name":"independent","page_name":"OsamaZahran","display_name":"Osama Zahran","profile_url":"https://independent.academia.edu/OsamaZahran?f_ri=1010378","photo":"/images/s65_no_pic.png"}],"research_interests":[{"id":91262,"name":"Wavelet Transform","url":"https://www.academia.edu/Documents/in/Wavelet_Transform?f_ri=1010378","nofollow":true},{"id":187345,"name":"Color Image","url":"https://www.academia.edu/Documents/in/Color_Image?f_ri=1010378","nofollow":true},{"id":238658,"name":"Progress","url":"https://www.academia.edu/Documents/in/Progress?f_ri=1010378","nofollow":true},{"id":693726,"name":"Landmine Detection","url":"https://www.academia.edu/Documents/in/Landmine_Detection?f_ri=1010378","nofollow":true},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378"},{"id":1763942,"name":"Probability of Detection","url":"https://www.academia.edu/Documents/in/Probability_of_Detection?f_ri=1010378"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_12398837" data-work_id="12398837" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/12398837/Time_resolved_fuel_injector_flow_characterisation_based_on_3D_laser_Doppler_vibrometry">Time-resolved fuel injector flow characterisation based on 3D laser Doppler vibrometry</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">Hydrodynamic turbulence and cavitation are known to play a significant role in high-pressure atomizers, but the small geometries and extreme operating conditions hinder the understanding of the flow's characteristics. Diesel internal flow... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_12398837" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">Hydrodynamic turbulence and cavitation are known to play a significant role in high-pressure atomizers, but the small geometries and extreme operating conditions hinder the understanding of the flow's characteristics. Diesel internal flow experiments are generally conducted using x-ray techniques or on transparent, and often enlarged, nozzles with different orifice geometries and surface roughness to those found in production injectors. In order to enable investigations of the fuel flow inside unmodified injectors, we have developed a new experimental approach to measure time-resolved vibration spectra of diesel nozzles using a 3D laser vibrometer. The technique we propose is based on the triangulation of the vibrometer and fuel pressure transducer signals, and enables the quantitative characterisation of quasi-cyclic internal flows without requiring modifications to the injector, the working fluid, or limiting the fuel injection pressure. The vibrometer, which uses the Doppler effect to measure the velocity of a vibrating object, was used to scan injector nozzle tips during the injection event. The data were processed using a discrete Fourier transform to provide time-resolved spectra for valve-closed-orifice, minisac and microsac nozzle geometries, and injection pressures ranging from 60 to 160 MPa, hence offering unprecedented insight into cyclic cavitation and internal mechanical dynamic processes. A peak was consistently found in the spectrograms between 6 and 7.5 kHz for all nozzles and injection pressures. Further evidence of a similar spectral peak was obtained from the fuel pressure transducer and a needle lift sensor mounted into the injector body. Evidence of propagation of the nozzle oscillations to the liquid sprays was obtained by recording highspeed videos of the near-nozzle diesel jet, and computing the fast Fourier transform for a number of pixel locations at the interface of the jets. This 6-7.5 kHz frequency peak is proposed to be the natural frequency for the injector's main internal fuel line. Other spectral peaks were found between 35 and 45 kHz for certain nozzle geometries, suggesting that these particular frequencies may be linked to nozzle dependent cavitation phenomena.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/12398837" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="9d5fd1c07b9846f369ac7e9e749a6e3b" rel="nofollow" data-download="{"attachment_id":46209520,"asset_id":12398837,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/46209520/download_file?st=MTc0MDg3MDkxOSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="31160270" href="https://brighton.academia.edu/MorganHeikal">Morgan Heikal</a><script data-card-contents-for-user="31160270" type="text/json">{"id":31160270,"first_name":"Morgan","last_name":"Heikal","domain_name":"brighton","page_name":"MorganHeikal","display_name":"Morgan Heikal","profile_url":"https://brighton.academia.edu/MorganHeikal?f_ri=1010378","photo":"/images/s65_no_pic.png"}</script></span></span></li><li class="js-paper-rank-work_12398837 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="12398837"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 12398837, container: ".js-paper-rank-work_12398837", }); 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Diesel internal flow experiments are generally conducted using x-ray techniques or on transparent, and often enlarged, nozzles with different orifice geometries and surface roughness to those found in production injectors. In order to enable investigations of the fuel flow inside unmodified injectors, we have developed a new experimental approach to measure time-resolved vibration spectra of diesel nozzles using a 3D laser vibrometer. The technique we propose is based on the triangulation of the vibrometer and fuel pressure transducer signals, and enables the quantitative characterisation of quasi-cyclic internal flows without requiring modifications to the injector, the working fluid, or limiting the fuel injection pressure. The vibrometer, which uses the Doppler effect to measure the velocity of a vibrating object, was used to scan injector nozzle tips during the injection event. The data were processed using a discrete Fourier transform to provide time-resolved spectra for valve-closed-orifice, minisac and microsac nozzle geometries, and injection pressures ranging from 60 to 160 MPa, hence offering unprecedented insight into cyclic cavitation and internal mechanical dynamic processes. A peak was consistently found in the spectrograms between 6 and 7.5 kHz for all nozzles and injection pressures. Further evidence of a similar spectral peak was obtained from the fuel pressure transducer and a needle lift sensor mounted into the injector body. Evidence of propagation of the nozzle oscillations to the liquid sprays was obtained by recording highspeed videos of the near-nozzle diesel jet, and computing the fast Fourier transform for a number of pixel locations at the interface of the jets. This 6-7.5 kHz frequency peak is proposed to be the natural frequency for the injector's main internal fuel line. Other spectral peaks were found between 35 and 45 kHz for certain nozzle geometries, suggesting that these particular frequencies may be linked to nozzle dependent cavitation phenomena.","downloadable_attachments":[{"id":46209520,"asset_id":12398837,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":31160270,"first_name":"Morgan","last_name":"Heikal","domain_name":"brighton","page_name":"MorganHeikal","display_name":"Morgan Heikal","profile_url":"https://brighton.academia.edu/MorganHeikal?f_ri=1010378","photo":"/images/s65_no_pic.png"}],"research_interests":[{"id":48,"name":"Engineering","url":"https://www.academia.edu/Documents/in/Engineering?f_ri=1010378","nofollow":true},{"id":3769,"name":"Vibrations","url":"https://www.academia.edu/Documents/in/Vibrations?f_ri=1010378","nofollow":true},{"id":4107,"name":"High Pressure","url":"https://www.academia.edu/Documents/in/High_Pressure?f_ri=1010378","nofollow":true},{"id":24558,"name":"Atomization","url":"https://www.academia.edu/Documents/in/Atomization?f_ri=1010378","nofollow":true},{"id":33296,"name":"Surface Roughness","url":"https://www.academia.edu/Documents/in/Surface_Roughness?f_ri=1010378"},{"id":56001,"name":"X Rays","url":"https://www.academia.edu/Documents/in/X_Rays?f_ri=1010378"},{"id":71793,"name":"Measurement Science and Technology","url":"https://www.academia.edu/Documents/in/Measurement_Science_and_Technology?f_ri=1010378"},{"id":93023,"name":"Laser Doppler Vibrometry","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometry?f_ri=1010378"},{"id":102726,"name":"Cavitation","url":"https://www.academia.edu/Documents/in/Cavitation?f_ri=1010378"},{"id":104883,"name":"Hydrodynamic Cavitation","url":"https://www.academia.edu/Documents/in/Hydrodynamic_Cavitation?f_ri=1010378"},{"id":118582,"name":"Physical sciences","url":"https://www.academia.edu/Documents/in/Physical_sciences?f_ri=1010378"},{"id":137416,"name":"Spray Atomization","url":"https://www.academia.edu/Documents/in/Spray_Atomization?f_ri=1010378"},{"id":146633,"name":"Natural Frequency","url":"https://www.academia.edu/Documents/in/Natural_Frequency?f_ri=1010378"},{"id":151048,"name":"Spectrogram","url":"https://www.academia.edu/Documents/in/Spectrogram?f_ri=1010378"},{"id":158186,"name":"Time Resolved","url":"https://www.academia.edu/Documents/in/Time_Resolved?f_ri=1010378"},{"id":174781,"name":"Oscillations","url":"https://www.academia.edu/Documents/in/Oscillations?f_ri=1010378"},{"id":225552,"name":"Fuel Injectors","url":"https://www.academia.edu/Documents/in/Fuel_Injectors?f_ri=1010378"},{"id":231136,"name":"Water Hammer","url":"https://www.academia.edu/Documents/in/Water_Hammer?f_ri=1010378"},{"id":281159,"name":"Diesel engine","url":"https://www.academia.edu/Documents/in/Diesel_engine?f_ri=1010378"},{"id":281186,"name":"Fuel spray","url":"https://www.academia.edu/Documents/in/Fuel_spray?f_ri=1010378"},{"id":317745,"name":"High Speed","url":"https://www.academia.edu/Documents/in/High_Speed?f_ri=1010378"},{"id":346685,"name":"Spray Nozzle Design","url":"https://www.academia.edu/Documents/in/Spray_Nozzle_Design?f_ri=1010378"},{"id":350878,"name":"Diesel engines","url":"https://www.academia.edu/Documents/in/Diesel_engines?f_ri=1010378"},{"id":477865,"name":"Operant Conditioning","url":"https://www.academia.edu/Documents/in/Operant_Conditioning?f_ri=1010378"},{"id":521099,"name":"Doppler effect","url":"https://www.academia.edu/Documents/in/Doppler_effect?f_ri=1010378"},{"id":586276,"name":"Real-Size Nozzle","url":"https://www.academia.edu/Documents/in/Real-Size_Nozzle?f_ri=1010378"},{"id":586277,"name":"Transparent nozzle tip","url":"https://www.academia.edu/Documents/in/Transparent_nozzle_tip?f_ri=1010378"},{"id":588226,"name":"Fast Fourier Transform","url":"https://www.academia.edu/Documents/in/Fast_Fourier_Transform?f_ri=1010378"},{"id":686007,"name":"Laser doppler vibrometery","url":"https://www.academia.edu/Documents/in/Laser_doppler_vibrometery?f_ri=1010378"},{"id":850211,"name":"Fuel Injector","url":"https://www.academia.edu/Documents/in/Fuel_Injector?f_ri=1010378"},{"id":974655,"name":"Injectors and Sprays","url":"https://www.academia.edu/Documents/in/Injectors_and_Sprays?f_ri=1010378"},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378"},{"id":1317821,"name":"Injector Nozzle","url":"https://www.academia.edu/Documents/in/Injector_Nozzle?f_ri=1010378"},{"id":1325653,"name":"Direct Fuel Injector Systems","url":"https://www.academia.edu/Documents/in/Direct_Fuel_Injector_Systems?f_ri=1010378"},{"id":1800838,"name":"Discrete Fourier Transform","url":"https://www.academia.edu/Documents/in/Discrete_Fourier_Transform?f_ri=1010378"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_18804737 coauthored" data-work_id="18804737" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/18804737/TIME_AVERAGE_HOLOGRAPHY_STUDY_OF_HUMAN_TYMPANIC_MEMBRANE_WITH_ALTERED_MIDDLE_EAR_OSSICULAR_CHAIN">TIME AVERAGE HOLOGRAPHY STUDY OF HUMAN TYMPANIC MEMBRANE WITH ALTERED MIDDLE EAR OSSICULAR CHAIN</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">Computer-assisted time average holographic interferometry was used to study the vibration of the human tympanic membrane (TM) in cadaveric temporal bones before and after alterations of the ossicular chain. Simultaneous laser Doppler... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_18804737" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">Computer-assisted time average holographic interferometry was used to study the vibration of the human tympanic membrane (TM) in cadaveric temporal bones before and after alterations of the ossicular chain. Simultaneous laser Doppler vibrometer measurements of stapes velocity were performed to estimate the conductive hearing loss caused by ossicular alterations. The quantified TM motion described from holographic images was correlated with stapes velocity to define relations between TM motion and stapes velocity in various ossicular disorders. The results suggest that motions of the TM are relatively uncoupled from stapes motion at frequencies above 1000 Hz.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/18804737" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="907c2ef0fb4a86c9e241c1ee9c418ef0" rel="nofollow" data-download="{"attachment_id":40264204,"asset_id":18804737,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/40264204/download_file?st=MTc0MDg3MDkxOSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="38889629" href="https://independent.academia.edu/JohnRosowski">John Rosowski</a><script data-card-contents-for-user="38889629" type="text/json">{"id":38889629,"first_name":"John","last_name":"Rosowski","domain_name":"independent","page_name":"JohnRosowski","display_name":"John Rosowski","profile_url":"https://independent.academia.edu/JohnRosowski?f_ri=1010378","photo":"/images/s65_no_pic.png"}</script></span></span><span class="u-displayInlineBlock InlineList-item-text"> and <span class="u-textDecorationUnderline u-clickable InlineList-item-text js-work-more-authors-18804737">+2</span><div class="hidden js-additional-users-18804737"><div><span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a href="https://independent.academia.edu/ChengJeffrey">Jeffrey Cheng</a></span></div><div><span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a href="https://independent.academia.edu/NesimHulli">Nesim Hulli</a></span></div></div></span><script>(function(){ var popoverSettings = { el: $('.js-work-more-authors-18804737'), placement: 'bottom', hide_delay: 200, html: true, content: function(){ return $('.js-additional-users-18804737').html(); 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Simultaneous laser Doppler vibrometer measurements of stapes velocity were performed to estimate the conductive hearing loss caused by ossicular alterations. The quantified TM motion described from holographic images was correlated with stapes velocity to define relations between TM motion and stapes velocity in various ossicular disorders. The results suggest that motions of the TM are relatively uncoupled from stapes motion at frequencies above 1000 Hz.","downloadable_attachments":[{"id":40264204,"asset_id":18804737,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":38889629,"first_name":"John","last_name":"Rosowski","domain_name":"independent","page_name":"JohnRosowski","display_name":"John Rosowski","profile_url":"https://independent.academia.edu/JohnRosowski?f_ri=1010378","photo":"/images/s65_no_pic.png"},{"id":39049893,"first_name":"Jeffrey","last_name":"Cheng","domain_name":"independent","page_name":"ChengJeffrey","display_name":"Jeffrey Cheng","profile_url":"https://independent.academia.edu/ChengJeffrey?f_ri=1010378","photo":"/images/s65_no_pic.png"},{"id":38991839,"first_name":"Nesim","last_name":"Hulli","domain_name":"independent","page_name":"NesimHulli","display_name":"Nesim Hulli","profile_url":"https://independent.academia.edu/NesimHulli?f_ri=1010378","photo":"/images/s65_no_pic.png"}],"research_interests":[{"id":180673,"name":"Hearing Loss","url":"https://www.academia.edu/Documents/in/Hearing_Loss?f_ri=1010378","nofollow":true},{"id":533760,"name":"Challenges","url":"https://www.academia.edu/Documents/in/Challenges?f_ri=1010378","nofollow":true},{"id":815168,"name":"Temporal Bone","url":"https://www.academia.edu/Documents/in/Temporal_Bone?f_ri=1010378","nofollow":true},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378","nofollow":true},{"id":1746782,"name":"Tympanic Membrane","url":"https://www.academia.edu/Documents/in/Tympanic_Membrane?f_ri=1010378"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_7601085" data-work_id="7601085" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/7601085/Closed_loop_control_of_a_microfabricated_actuator_for_dual_stage_hard_disk_drive_servo_systems">Closed-loop control of a microfabricated actuator for dual-stage hard disk drive servo systems</a></div></div><div class="u-pb4x u-mt3x"></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/7601085" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="022c496459defbbc642929d0f3c7eca1" rel="nofollow" data-download="{"attachment_id":48403782,"asset_id":7601085,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/48403782/download_file?st=MTc0MDg3MDkxOSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="13709182" href="https://independent.academia.edu/DanielHernandez40">Daniel Hernandez</a><script data-card-contents-for-user="13709182" type="text/json">{"id":13709182,"first_name":"Daniel","last_name":"Hernandez","domain_name":"independent","page_name":"DanielHernandez40","display_name":"Daniel Hernandez","profile_url":"https://independent.academia.edu/DanielHernandez40?f_ri=1010378","photo":"https://0.academia-photos.com/13709182/22824763/21980494/s65_daniel.hernandez.jpg"}</script></span></span></li><li class="js-paper-rank-work_7601085 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="7601085"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 7601085, container: ".js-paper-rank-work_7601085", }); });</script></li><li class="js-percentile-work_7601085 InlineList-item InlineList-item--bordered hidden u-tcGrayDark"><span class="percentile-widget hidden"><span class="u-mr2x percentile-widget" style="display: none">•</span><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 7601085; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-percentile-work_7601085"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></li><li class="js-view-count-work_7601085 InlineList-item InlineList-item--bordered hidden"><div><span><span class="js-view-count view-count u-mr2x" data-work-id="7601085"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 7601085; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=7601085]").text(description); $(".js-view-count-work_7601085").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_7601085").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="7601085"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">7</a>  </div><span class="InlineList-item-text u-textTruncate u-pl9x"><a class="InlineList-item-text" data-has-card-for-ri="30596" rel="nofollow" href="https://www.academia.edu/Documents/in/Control_Systems">Control Systems</a>, <script data-card-contents-for-ri="30596" type="text/json">{"id":30596,"name":"Control Systems","url":"https://www.academia.edu/Documents/in/Control_Systems?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="35399" rel="nofollow" href="https://www.academia.edu/Documents/in/Control_system">Control system</a>, <script data-card-contents-for-ri="35399" type="text/json">{"id":35399,"name":"Control system","url":"https://www.academia.edu/Documents/in/Control_system?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="189374" rel="nofollow" href="https://www.academia.edu/Documents/in/Closed_Loop_Control">Closed Loop Control</a>, <script data-card-contents-for-ri="189374" type="text/json">{"id":189374,"name":"Closed Loop Control","url":"https://www.academia.edu/Documents/in/Closed_Loop_Control?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="936410" rel="nofollow" href="https://www.academia.edu/Documents/in/Bandwidth">Bandwidth</a><script data-card-contents-for-ri="936410" type="text/json">{"id":936410,"name":"Bandwidth","url":"https://www.academia.edu/Documents/in/Bandwidth?f_ri=1010378","nofollow":true}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=7601085]'), work: {"id":7601085,"title":"Closed-loop control of a microfabricated actuator for dual-stage hard disk drive servo systems","created_at":"2014-07-08T12:55:31.030-07:00","url":"https://www.academia.edu/7601085/Closed_loop_control_of_a_microfabricated_actuator_for_dual_stage_hard_disk_drive_servo_systems?f_ri=1010378","dom_id":"work_7601085","summary":null,"downloadable_attachments":[{"id":48403782,"asset_id":7601085,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":13709182,"first_name":"Daniel","last_name":"Hernandez","domain_name":"independent","page_name":"DanielHernandez40","display_name":"Daniel Hernandez","profile_url":"https://independent.academia.edu/DanielHernandez40?f_ri=1010378","photo":"https://0.academia-photos.com/13709182/22824763/21980494/s65_daniel.hernandez.jpg"}],"research_interests":[{"id":30596,"name":"Control Systems","url":"https://www.academia.edu/Documents/in/Control_Systems?f_ri=1010378","nofollow":true},{"id":35399,"name":"Control system","url":"https://www.academia.edu/Documents/in/Control_system?f_ri=1010378","nofollow":true},{"id":189374,"name":"Closed Loop Control","url":"https://www.academia.edu/Documents/in/Closed_Loop_Control?f_ri=1010378","nofollow":true},{"id":936410,"name":"Bandwidth","url":"https://www.academia.edu/Documents/in/Bandwidth?f_ri=1010378","nofollow":true},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378"},{"id":1128011,"name":"Electrostatic Actuator","url":"https://www.academia.edu/Documents/in/Electrostatic_Actuator?f_ri=1010378"},{"id":1360090,"name":"Hard Disk Drive","url":"https://www.academia.edu/Documents/in/Hard_Disk_Drive?f_ri=1010378"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_26376673" data-work_id="26376673" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/26376673/Characterization_of_Rotating_Structures_in_Coast_down_by_means_of_Continuous_Tracking_Laser_Doppler_Vibrometer">Characterization of Rotating Structures in Coast-down by means of Continuous Tracking Laser Doppler Vibrometer</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">In rotating machinery variations of modal parameters with rotation speed may be extremely important in particular if very light and undamped structures are taken into account, like helicopters rotors or wind turbines. The relation between... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_26376673" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">In rotating machinery variations of modal parameters with rotation speed may be extremely important in particular if very light and undamped structures are taken into account, like helicopters rotors or wind turbines. The relation between natural frequencies and rotation speed is expressed in the form of Campbell diagrams. However it could be required to know also the deviation of operational or mode shapes. In several cases it is not possible to fully control the rotating speed of the machine and only coast-down tests can be performed. Such kind of tests is often fast due to the reduced inertia of rotors: for this reason, an experimental technique able to determine Operational Deflection Shapes (ODSs) in short time and with sufficient accuracy, appears very promising. Moreover coast-down processes are very difficult to be controlled, they causing unsteady vibrations. The need to obtain ODSs from coast-down experiments requires the measurement over a large number of points and therefore a very efficient approach for the rotation control and synchronous acquisition must be developed.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/26376673" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="3ab5116eb9b3b4dca06e161c16565146" rel="nofollow" data-download="{"attachment_id":46680234,"asset_id":26376673,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/46680234/download_file?st=MTc0MDg3MDkxOSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="50310086" href="https://independent.academia.edu/MMartarelli">M. Martarelli</a><script data-card-contents-for-user="50310086" type="text/json">{"id":50310086,"first_name":"M.","last_name":"Martarelli","domain_name":"independent","page_name":"MMartarelli","display_name":"M. Martarelli","profile_url":"https://independent.academia.edu/MMartarelli?f_ri=1010378","photo":"/images/s65_no_pic.png"}</script></span></span></li><li class="js-paper-rank-work_26376673 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="26376673"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 26376673, container: ".js-paper-rank-work_26376673", }); });</script></li><li class="js-percentile-work_26376673 InlineList-item InlineList-item--bordered hidden u-tcGrayDark"><span class="percentile-widget hidden"><span class="u-mr2x percentile-widget" style="display: none">•</span><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 26376673; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-percentile-work_26376673"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></li><li class="js-view-count-work_26376673 InlineList-item InlineList-item--bordered hidden"><div><span><span class="js-view-count view-count u-mr2x" data-work-id="26376673"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 26376673; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=26376673]").text(description); $(".js-view-count-work_26376673").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_26376673").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="26376673"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">7</a>  </div><span class="InlineList-item-text u-textTruncate u-pl9x"><a class="InlineList-item-text" data-has-card-for-ri="69575" rel="nofollow" href="https://www.academia.edu/Documents/in/Wind_turbine">Wind turbine</a>, <script data-card-contents-for-ri="69575" type="text/json">{"id":69575,"name":"Wind turbine","url":"https://www.academia.edu/Documents/in/Wind_turbine?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="93023" rel="nofollow" href="https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometry">Laser Doppler Vibrometry</a>, <script data-card-contents-for-ri="93023" type="text/json">{"id":93023,"name":"Laser Doppler Vibrometry","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometry?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="105424" rel="nofollow" href="https://www.academia.edu/Documents/in/Experimental_Modal_Analysis">Experimental Modal Analysis</a>, <script data-card-contents-for-ri="105424" type="text/json">{"id":105424,"name":"Experimental Modal Analysis","url":"https://www.academia.edu/Documents/in/Experimental_Modal_Analysis?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="146633" rel="nofollow" href="https://www.academia.edu/Documents/in/Natural_Frequency">Natural Frequency</a><script data-card-contents-for-ri="146633" type="text/json">{"id":146633,"name":"Natural Frequency","url":"https://www.academia.edu/Documents/in/Natural_Frequency?f_ri=1010378","nofollow":true}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=26376673]'), work: {"id":26376673,"title":"Characterization of Rotating Structures in Coast-down by means of Continuous Tracking Laser Doppler Vibrometer","created_at":"2016-06-21T09:23:41.308-07:00","url":"https://www.academia.edu/26376673/Characterization_of_Rotating_Structures_in_Coast_down_by_means_of_Continuous_Tracking_Laser_Doppler_Vibrometer?f_ri=1010378","dom_id":"work_26376673","summary":"In rotating machinery variations of modal parameters with rotation speed may be extremely important in particular if very light and undamped structures are taken into account, like helicopters rotors or wind turbines. The relation between natural frequencies and rotation speed is expressed in the form of Campbell diagrams. However it could be required to know also the deviation of operational or mode shapes. In several cases it is not possible to fully control the rotating speed of the machine and only coast-down tests can be performed. Such kind of tests is often fast due to the reduced inertia of rotors: for this reason, an experimental technique able to determine Operational Deflection Shapes (ODSs) in short time and with sufficient accuracy, appears very promising. Moreover coast-down processes are very difficult to be controlled, they causing unsteady vibrations. The need to obtain ODSs from coast-down experiments requires the measurement over a large number of points and therefore a very efficient approach for the rotation control and synchronous acquisition must be developed.","downloadable_attachments":[{"id":46680234,"asset_id":26376673,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":50310086,"first_name":"M.","last_name":"Martarelli","domain_name":"independent","page_name":"MMartarelli","display_name":"M. Martarelli","profile_url":"https://independent.academia.edu/MMartarelli?f_ri=1010378","photo":"/images/s65_no_pic.png"}],"research_interests":[{"id":69575,"name":"Wind turbine","url":"https://www.academia.edu/Documents/in/Wind_turbine?f_ri=1010378","nofollow":true},{"id":93023,"name":"Laser Doppler Vibrometry","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometry?f_ri=1010378","nofollow":true},{"id":105424,"name":"Experimental Modal Analysis","url":"https://www.academia.edu/Documents/in/Experimental_Modal_Analysis?f_ri=1010378","nofollow":true},{"id":146633,"name":"Natural Frequency","url":"https://www.academia.edu/Documents/in/Natural_Frequency?f_ri=1010378","nofollow":true},{"id":604200,"name":"Spatial resolution","url":"https://www.academia.edu/Documents/in/Spatial_resolution?f_ri=1010378"},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378"},{"id":1195987,"name":"Laboratory Tests","url":"https://www.academia.edu/Documents/in/Laboratory_Tests?f_ri=1010378"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_58878653" data-work_id="58878653" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/58878653/Optimizing_automatic_object_detection_from_images_in_Laser_Doppler_Vibrometer_based_Acoustic_to_Seismic_landmine_detection_system">Optimizing automatic object detection from images in Laser Doppler Vibrometer based Acoustic to Seismic landmine detection system</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">The Laser Doppler Vibrometer (LDV) based Acoustic to Seismic (A/S) landmine detection system is one of the reliable and powerful landmine detection systems. The interpretation of the LDV based A/S data is performed off-line, manually,... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_58878653" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">The Laser Doppler Vibrometer (LDV) based Acoustic to Seismic (A/S) landmine detection system is one of the reliable and powerful landmine detection systems. The interpretation of the LDV based A/S data is performed off-line, manually, depending heavily on the skills, experience, alertness and consistency of a trained operator. This takes a long time. The manually obtained results suffer from errors,</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/58878653" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="15d5524f1d49b65c495762f5700688b1" rel="nofollow" data-download="{"attachment_id":73076069,"asset_id":58878653,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/73076069/download_file?st=MTc0MDg3MDkxOSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="39785566" href="https://independent.academia.edu/eelrabaie">el-sayed el-rabaie</a><script data-card-contents-for-user="39785566" type="text/json">{"id":39785566,"first_name":"el-sayed","last_name":"el-rabaie","domain_name":"independent","page_name":"eelrabaie","display_name":"el-sayed el-rabaie","profile_url":"https://independent.academia.edu/eelrabaie?f_ri=1010378","photo":"/images/s65_no_pic.png"}</script></span></span></li><li class="js-paper-rank-work_58878653 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="58878653"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 58878653, container: ".js-paper-rank-work_58878653", }); 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$(".js-view-count[data-work-id=58878653]").text(description); $(".js-view-count-work_58878653").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_58878653").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="58878653"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">8</a>  </div><span class="InlineList-item-text u-textTruncate u-pl9x"><a class="InlineList-item-text" data-has-card-for-ri="52437" rel="nofollow" href="https://www.academia.edu/Documents/in/Processing_Speed">Processing Speed</a>, <script data-card-contents-for-ri="52437" type="text/json">{"id":52437,"name":"Processing Speed","url":"https://www.academia.edu/Documents/in/Processing_Speed?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="91262" rel="nofollow" href="https://www.academia.edu/Documents/in/Wavelet_Transform">Wavelet Transform</a>, <script data-card-contents-for-ri="91262" type="text/json">{"id":91262,"name":"Wavelet Transform","url":"https://www.academia.edu/Documents/in/Wavelet_Transform?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="187345" rel="nofollow" href="https://www.academia.edu/Documents/in/Color_Image">Color Image</a>, <script data-card-contents-for-ri="187345" type="text/json">{"id":187345,"name":"Color Image","url":"https://www.academia.edu/Documents/in/Color_Image?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="693726" rel="nofollow" href="https://www.academia.edu/Documents/in/Landmine_Detection">Landmine Detection</a><script data-card-contents-for-ri="693726" type="text/json">{"id":693726,"name":"Landmine Detection","url":"https://www.academia.edu/Documents/in/Landmine_Detection?f_ri=1010378","nofollow":true}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=58878653]'), work: {"id":58878653,"title":"Optimizing automatic object detection from images in Laser Doppler Vibrometer based Acoustic to Seismic landmine detection system","created_at":"2021-10-18T11:10:22.179-07:00","url":"https://www.academia.edu/58878653/Optimizing_automatic_object_detection_from_images_in_Laser_Doppler_Vibrometer_based_Acoustic_to_Seismic_landmine_detection_system?f_ri=1010378","dom_id":"work_58878653","summary":"The Laser Doppler Vibrometer (LDV) based Acoustic to Seismic (A/S) landmine detection system is one of the reliable and powerful landmine detection systems. The interpretation of the LDV based A/S data is performed off-line, manually, depending heavily on the skills, experience, alertness and consistency of a trained operator. This takes a long time. The manually obtained results suffer from errors,","downloadable_attachments":[{"id":73076069,"asset_id":58878653,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":39785566,"first_name":"el-sayed","last_name":"el-rabaie","domain_name":"independent","page_name":"eelrabaie","display_name":"el-sayed el-rabaie","profile_url":"https://independent.academia.edu/eelrabaie?f_ri=1010378","photo":"/images/s65_no_pic.png"}],"research_interests":[{"id":52437,"name":"Processing Speed","url":"https://www.academia.edu/Documents/in/Processing_Speed?f_ri=1010378","nofollow":true},{"id":91262,"name":"Wavelet Transform","url":"https://www.academia.edu/Documents/in/Wavelet_Transform?f_ri=1010378","nofollow":true},{"id":187345,"name":"Color Image","url":"https://www.academia.edu/Documents/in/Color_Image?f_ri=1010378","nofollow":true},{"id":693726,"name":"Landmine Detection","url":"https://www.academia.edu/Documents/in/Landmine_Detection?f_ri=1010378","nofollow":true},{"id":762830,"name":"Object Detection","url":"https://www.academia.edu/Documents/in/Object_Detection?f_ri=1010378"},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378"},{"id":1763942,"name":"Probability of Detection","url":"https://www.academia.edu/Documents/in/Probability_of_Detection?f_ri=1010378"},{"id":2548020,"name":"Automatic Detection","url":"https://www.academia.edu/Documents/in/Automatic_Detection?f_ri=1010378"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_30474780 coauthored" data-work_id="30474780" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/30474780/_title_Sound_wave_and_laser_excitation_for_acousto_optical_landmine_detection_title_"><title>Sound wave and laser excitation for acousto-optical landmine detection</title></a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">Acoustic landmine detection (ALD) is a technique for the detection of buried landmines including non-metal mines. An important issue in ALD is the acoustic excitation of the soil. Laser excitation is promising for complete standoff... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_30474780" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">Acoustic landmine detection (ALD) is a technique for the detection of buried landmines including non-metal mines. An important issue in ALD is the acoustic excitation of the soil. Laser excitation is promising for complete standoff detection using lasers for excitation and monitoring. Acoustic excitation is a more common technique that gives good results but requires an acoustic source close to the measured area. In a field test in 2002 both techniques were compared side by side. A number of buried landmines were measured using both types of excitation. Various types of landmines were used, both anti-tank and anti-personnel, which were buried at various depths in different soil types with varying humidity. Two Laser Doppler Vibrometer (LDV) systems of two different wavelengths for the different approaches were used, one based on a He-Ne laser at 0.633 µm with acoustic excitation and one on an erbium fiber laser at 1.54 µm in the case of laser excitation. The acoustic excitation gives a good contrast between the buried mine and the surrounding soil at certain frequencies. Laser excitation gives a pulse response that is more difficult to interpret but is potentially a faster technique. In both cases buried mines could be detected.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/30474780" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="5da1a6068629d84d30bea40446e9062b" rel="nofollow" data-download="{"attachment_id":50914122,"asset_id":30474780,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/50914122/download_file?st=MTc0MDg3MDkxOSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="58093444" href="https://independent.academia.edu/FrankvanPutten">Frank van Putten</a><script data-card-contents-for-user="58093444" type="text/json">{"id":58093444,"first_name":"Frank van","last_name":"Putten","domain_name":"independent","page_name":"FrankvanPutten","display_name":"Frank van Putten","profile_url":"https://independent.academia.edu/FrankvanPutten?f_ri=1010378","photo":"/images/s65_no_pic.png"}</script></span></span><span class="u-displayInlineBlock InlineList-item-text"> and <span class="u-textDecorationUnderline u-clickable InlineList-item-text js-work-more-authors-30474780">+1</span><div class="hidden js-additional-users-30474780"><div><span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a href="https://independent.academia.edu/JohanvanDenHeuvel">Johan van Den Heuvel</a></span></div></div></span><script>(function(){ var popoverSettings = { el: $('.js-work-more-authors-30474780'), placement: 'bottom', hide_delay: 200, html: true, content: function(){ return $('.js-additional-users-30474780').html(); } } new HoverPopover(popoverSettings); })();</script></li><li class="js-paper-rank-work_30474780 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="30474780"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 30474780, container: ".js-paper-rank-work_30474780", }); });</script></li><li class="js-percentile-work_30474780 InlineList-item InlineList-item--bordered hidden u-tcGrayDark"><span class="percentile-widget hidden"><span class="u-mr2x percentile-widget" style="display: none">•</span><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 30474780; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-percentile-work_30474780"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></li><li class="js-view-count-work_30474780 InlineList-item InlineList-item--bordered hidden"><div><span><span class="js-view-count view-count u-mr2x" data-work-id="30474780"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 30474780; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=30474780]").text(description); $(".js-view-count-work_30474780").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_30474780").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="30474780"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">4</a>  </div><span class="InlineList-item-text u-textTruncate u-pl9x"><a class="InlineList-item-text" data-has-card-for-ri="31163" rel="nofollow" href="https://www.academia.edu/Documents/in/Fiber_Laser">Fiber Laser</a>, <script data-card-contents-for-ri="31163" type="text/json">{"id":31163,"name":"Fiber Laser","url":"https://www.academia.edu/Documents/in/Fiber_Laser?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="617780" rel="nofollow" href="https://www.academia.edu/Documents/in/Soil_Type">Soil Type</a>, <script data-card-contents-for-ri="617780" type="text/json">{"id":617780,"name":"Soil Type","url":"https://www.academia.edu/Documents/in/Soil_Type?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="693726" rel="nofollow" href="https://www.academia.edu/Documents/in/Landmine_Detection">Landmine Detection</a>, <script data-card-contents-for-ri="693726" type="text/json">{"id":693726,"name":"Landmine Detection","url":"https://www.academia.edu/Documents/in/Landmine_Detection?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="1010378" rel="nofollow" href="https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer">Laser Doppler Vibrometer</a><script data-card-contents-for-ri="1010378" type="text/json">{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378","nofollow":true}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=30474780]'), work: {"id":30474780,"title":"\u003ctitle\u003eSound wave and laser excitation for acousto-optical landmine detection\u003c/title\u003e","created_at":"2016-12-15T23:42:34.413-08:00","url":"https://www.academia.edu/30474780/_title_Sound_wave_and_laser_excitation_for_acousto_optical_landmine_detection_title_?f_ri=1010378","dom_id":"work_30474780","summary":"Acoustic landmine detection (ALD) is a technique for the detection of buried landmines including non-metal mines. An important issue in ALD is the acoustic excitation of the soil. Laser excitation is promising for complete standoff detection using lasers for excitation and monitoring. Acoustic excitation is a more common technique that gives good results but requires an acoustic source close to the measured area. In a field test in 2002 both techniques were compared side by side. A number of buried landmines were measured using both types of excitation. Various types of landmines were used, both anti-tank and anti-personnel, which were buried at various depths in different soil types with varying humidity. Two Laser Doppler Vibrometer (LDV) systems of two different wavelengths for the different approaches were used, one based on a He-Ne laser at 0.633 µm with acoustic excitation and one on an erbium fiber laser at 1.54 µm in the case of laser excitation. The acoustic excitation gives a good contrast between the buried mine and the surrounding soil at certain frequencies. Laser excitation gives a pulse response that is more difficult to interpret but is potentially a faster technique. In both cases buried mines could be detected.","downloadable_attachments":[{"id":50914122,"asset_id":30474780,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":58093444,"first_name":"Frank van","last_name":"Putten","domain_name":"independent","page_name":"FrankvanPutten","display_name":"Frank van Putten","profile_url":"https://independent.academia.edu/FrankvanPutten?f_ri=1010378","photo":"/images/s65_no_pic.png"},{"id":58202296,"first_name":"Johan van Den","last_name":"Heuvel","domain_name":"independent","page_name":"JohanvanDenHeuvel","display_name":"Johan van Den Heuvel","profile_url":"https://independent.academia.edu/JohanvanDenHeuvel?f_ri=1010378","photo":"/images/s65_no_pic.png"}],"research_interests":[{"id":31163,"name":"Fiber Laser","url":"https://www.academia.edu/Documents/in/Fiber_Laser?f_ri=1010378","nofollow":true},{"id":617780,"name":"Soil Type","url":"https://www.academia.edu/Documents/in/Soil_Type?f_ri=1010378","nofollow":true},{"id":693726,"name":"Landmine Detection","url":"https://www.academia.edu/Documents/in/Landmine_Detection?f_ri=1010378","nofollow":true},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378","nofollow":true}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_10889784" data-work_id="10889784" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/10889784/Non_invasive_assessment_of_endothelial_function_in_normal_pregnancy">Non-invasive assessment of endothelial function in normal pregnancy</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">ObjectiveTo assess endothelial function in normal pregnancy by non-invasive methods.To assess endothelial function in normal pregnancy by non-invasive methods.MethodsFlow-mediated dilatation of the brachial artery was measured by... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_10889784" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">ObjectiveTo assess endothelial function in normal pregnancy by non-invasive methods.To assess endothelial function in normal pregnancy by non-invasive methods.MethodsFlow-mediated dilatation of the brachial artery was measured by ultrasonography in 157 women with normal singleton pregnancies between 10 and 40 weeks' gestation and 19 non-pregnant controls.ResultsFlow-mediated dilatation in the non-pregnant controls was 6.42 ± 2.45%. In pregnant women, between 10 and 30 weeks, the mean flow-mediated dilatation (8.84 ± 3.18%) was significantly higher than the non-pregnant controls (P = 0.002), but after 30 weeks of gestation there was a decrease to prepregnancy levels. Resting vessel diameter and blood flow were significantly increased in pregnancy, mainly after 30 weeks' gestation (P < 0.001, P < 0.001, respectively). Flow-mediated dilatation was significantly correlated to resting vessel diameter and reactive hyperemia.Flow-mediated dilatation of the brachial artery was measured by ultrasonography in 157 women with normal singleton pregnancies between 10 and 40 weeks' gestation and 19 non-pregnant controls.ResultsFlow-mediated dilatation in the non-pregnant controls was 6.42 ± 2.45%. In pregnant women, between 10 and 30 weeks, the mean flow-mediated dilatation (8.84 ± 3.18%) was significantly higher than the non-pregnant controls (P = 0.002), but after 30 weeks of gestation there was a decrease to prepregnancy levels. Resting vessel diameter and blood flow were significantly increased in pregnancy, mainly after 30 weeks' gestation (P < 0.001, P < 0.001, respectively). Flow-mediated dilatation was significantly correlated to resting vessel diameter and reactive hyperemia.ConclusionNormal pregnancy is associated with enhanced endothelial function which is apparent from at least 10 weeks' gestation. Copyright © 2000 International Society of Ultrasound in Obstetrics and GynecologyNormal pregnancy is associated with enhanced endothelial function which is apparent from at least 10 weeks' gestation. Copyright © 2000 International Society of Ultrasound in Obstetrics and Gynecology</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/10889784" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="a4fa666aef1760b3daf2db081c19a087" rel="nofollow" data-download="{"attachment_id":47047687,"asset_id":10889784,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/47047687/download_file?st=MTc0MDg3MDkxOSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="26440239" href="https://kcl.academia.edu/NikosKametas">Nikos Kametas</a><script data-card-contents-for-user="26440239" type="text/json">{"id":26440239,"first_name":"Nikos","last_name":"Kametas","domain_name":"kcl","page_name":"NikosKametas","display_name":"Nikos Kametas","profile_url":"https://kcl.academia.edu/NikosKametas?f_ri=1010378","photo":"/images/s65_no_pic.png"}</script></span></span></li><li class="js-paper-rank-work_10889784 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="10889784"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 10889784, container: ".js-paper-rank-work_10889784", }); 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In pregnant women, between 10 and 30 weeks, the mean flow-mediated dilatation (8.84 ± 3.18%) was significantly higher than the non-pregnant controls (P = 0.002), but after 30 weeks of gestation there was a decrease to prepregnancy levels. Resting vessel diameter and blood flow were significantly increased in pregnancy, mainly after 30 weeks' gestation (P \u003c 0.001, P \u003c 0.001, respectively). Flow-mediated dilatation was significantly correlated to resting vessel diameter and reactive hyperemia.Flow-mediated dilatation of the brachial artery was measured by ultrasonography in 157 women with normal singleton pregnancies between 10 and 40 weeks' gestation and 19 non-pregnant controls.ResultsFlow-mediated dilatation in the non-pregnant controls was 6.42 ± 2.45%. In pregnant women, between 10 and 30 weeks, the mean flow-mediated dilatation (8.84 ± 3.18%) was significantly higher than the non-pregnant controls (P = 0.002), but after 30 weeks of gestation there was a decrease to prepregnancy levels. Resting vessel diameter and blood flow were significantly increased in pregnancy, mainly after 30 weeks' gestation (P \u003c 0.001, P \u003c 0.001, respectively). Flow-mediated dilatation was significantly correlated to resting vessel diameter and reactive hyperemia.ConclusionNormal pregnancy is associated with enhanced endothelial function which is apparent from at least 10 weeks' gestation. Copyright © 2000 International Society of Ultrasound in Obstetrics and GynecologyNormal pregnancy is associated with enhanced endothelial function which is apparent from at least 10 weeks' gestation. Copyright © 2000 International Society of Ultrasound in Obstetrics and Gynecology","downloadable_attachments":[{"id":47047687,"asset_id":10889784,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":26440239,"first_name":"Nikos","last_name":"Kametas","domain_name":"kcl","page_name":"NikosKametas","display_name":"Nikos 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})();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_14324831 coauthored" data-work_id="14324831" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/14324831/Thermomechanical_response_of_membrane_like_MEMS_component">Thermomechanical response of membrane-like MEMS component</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">Basic electro-thermo-mechanical properties of micromachined GaAs/AlGaAs based thermal converter (MTC) device for gas sensors were characterized. Optical measurements of thermally induced deformations have been performed using laser... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_14324831" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">Basic electro-thermo-mechanical properties of micromachined GaAs/AlGaAs based thermal converter (MTC) device for gas sensors were characterized. Optical measurements of thermally induced deformations have been performed using laser doppler vibrometer (LDV). The results were obtained for the time dependence of the membrane MEMS element deflections as a response to input thermal power-max. 11 lm central deflection at the temperature difference of 350 K. The measured transient temperature time constant s = 1.48 ms coincides well with the value obtained by 2-D FEM simulation. An important influence of temperature changes on mechanical behaviour including dynamic vibration instability was demonstrated. The optical method was proved to be useful and effective MEMS design tool.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/14324831" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="2a29c7e0c6ca648e7c3a622421cf17a9" rel="nofollow" data-download="{"attachment_id":44318608,"asset_id":14324831,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/44318608/download_file?st=MTc0MDg3MDkxOSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="40773924" href="https://independent.academia.edu/JChlp%C3%ADk">J. 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Optical measurements of thermally induced deformations have been performed using laser doppler vibrometer (LDV). The results were obtained for the time dependence of the membrane MEMS element deflections as a response to input thermal power-max. 11 lm central deflection at the temperature difference of 350 K. The measured transient temperature time constant s = 1.48 ms coincides well with the value obtained by 2-D FEM simulation. An important influence of temperature changes on mechanical behaviour including dynamic vibration instability was demonstrated. The optical method was proved to be useful and effective MEMS design tool.","downloadable_attachments":[{"id":44318608,"asset_id":14324831,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":40773924,"first_name":"J.","last_name":"Chlpík","domain_name":"independent","page_name":"JChlpík","display_name":"J. Chlpík","profile_url":"https://independent.academia.edu/JChlp%C3%ADk?f_ri=1010378","photo":"/images/s65_no_pic.png"},{"id":33276469,"first_name":"M.","last_name":"Držík","domain_name":"independent","page_name":"MDržík","display_name":"M. Držík","profile_url":"https://independent.academia.edu/MDr%C5%BE%C3%ADk?f_ri=1010378","photo":"/images/s65_no_pic.png"}],"research_interests":[{"id":130044,"name":"Gas Sensor","url":"https://www.academia.edu/Documents/in/Gas_Sensor?f_ri=1010378","nofollow":true},{"id":180836,"name":"Design Tool","url":"https://www.academia.edu/Documents/in/Design_Tool?f_ri=1010378","nofollow":true},{"id":358198,"name":"Constant Time Delay","url":"https://www.academia.edu/Documents/in/Constant_Time_Delay?f_ri=1010378","nofollow":true},{"id":394477,"name":"Time Dependent","url":"https://www.academia.edu/Documents/in/Time_Dependent?f_ri=1010378","nofollow":true},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378"},{"id":1135964,"name":"Fem Simulation","url":"https://www.academia.edu/Documents/in/Fem_Simulation?f_ri=1010378"},{"id":1237788,"name":"Electrical And Electronic Engineering","url":"https://www.academia.edu/Documents/in/Electrical_And_Electronic_Engineering?f_ri=1010378"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_22413904" data-work_id="22413904" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/22413904/Guided_Waves_for_Aircraft_Panel_Monitoring">Guided Waves for Aircraft Panel Monitoring</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest">a <a href="mailto:pmalinowski@imp.gda.pl" rel="nofollow">pmalinowski@imp.gda.pl</a> (corresponding author), b <a href="mailto:tomaszw@imp.gda.pl" rel="nofollow">tomaszw@imp.gda.pl</a>, c <a href="mailto:wieslaw@imp.gda.pl" rel="nofollow">wieslaw@imp.gda.pl</a></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/22413904" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="a760196425054d5a364b1ec9eb1c33dd" rel="nofollow" data-download="{"attachment_id":43037006,"asset_id":22413904,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/43037006/download_file?st=MTc0MDg3MDkxOSw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="43894704" href="https://independent.academia.edu/PMalinowski1">P. 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Malinowski","profile_url":"https://independent.academia.edu/PMalinowski1?f_ri=1010378","photo":"/images/s65_no_pic.png"}],"research_interests":[{"id":58405,"name":"Lamb wave","url":"https://www.academia.edu/Documents/in/Lamb_wave?f_ri=1010378","nofollow":true},{"id":63353,"name":"Identification","url":"https://www.academia.edu/Documents/in/Identification?f_ri=1010378","nofollow":true},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378","nofollow":true},{"id":1300470,"name":"Guided Wave","url":"https://www.academia.edu/Documents/in/Guided_Wave?f_ri=1010378","nofollow":true}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_17013932" data-work_id="17013932" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/17013932/Przydatno%C5%9B%C4%87_badania_ruchomo%C5%9Bci_okienka_okr%C4%85g%C5%82ego_za_pomoc%C4%85_Laser_Doppler_Vibrometer_w_ocenie_rekonstrukcji_%C5%82a%C5%84cucha_kosteczek_s%C5%82uchowych_w_tympanoplastykach_typu_zamkni%C4%99tego">Przydatność badania ruchomości okienka okrągłego za pomocą Laser Doppler Vibrometer w ocenie rekonstrukcji łańcucha kosteczek słuchowych w tympanoplastykach typu zamkniętego</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">Round window's movability measurements with helping of LDV in evaluation of ossicular chain functioning.Quantitive evaluation of round window movability in normal conditions and after malleus stapes assembly reconstruction were aims of... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_17013932" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">Round window's movability measurements with helping of LDV in evaluation of ossicular chain functioning.Quantitive evaluation of round window movability in normal conditions and after malleus stapes assembly reconstruction were aims of the study.In the experiment there were taken 10 non-frozen temporal bones harvested within 48 hours.Temporal bones specimens were prepared like in closed technique with antromastoidectomy and large posterior tympanotomy. Hearing system before and after MSA reconstruction were evaluated by measurement of round window movement. Measurements were performed at four frequencies: 1000 Hz, 2000 Hz, 4000 Hz, 8000 Hz.In the normal ossicular chain the biggest movability were stated at frequency of 1 kHz. After reconstruction at all frequencies measurements were significantly worse. In reconstructed ears the highest movabilities were stated at frequencies 2000 Hz and 4000 Hz.Round window movability could be measured by Laser Doppler Vibrometry in posterior tympanotomy approach. Before reconstruction the biggest movability were evaluated at 1000 Hz and after MSA at 2000 Hz.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/17013932" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="c9002bff00104edf5e4caef7a2ac8bc2" rel="nofollow" data-download="{"attachment_id":42358281,"asset_id":17013932,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/42358281/download_file?st=MTc0MDg3MDkyMCw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="36555457" href="https://wum.academia.edu/KrzysztofMorawski">Krzysztof Morawski</a><script data-card-contents-for-user="36555457" type="text/json">{"id":36555457,"first_name":"Krzysztof","last_name":"Morawski","domain_name":"wum","page_name":"KrzysztofMorawski","display_name":"Krzysztof Morawski","profile_url":"https://wum.academia.edu/KrzysztofMorawski?f_ri=1010378","photo":"/images/s65_no_pic.png"}</script></span></span></li><li class="js-paper-rank-work_17013932 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="17013932"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 17013932, container: ".js-paper-rank-work_17013932", }); 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$(".js-view-count[data-work-id=17013932]").text(description); $(".js-view-count-work_17013932").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_17013932").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="17013932"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">7</a>  </div><span class="InlineList-item-text u-textTruncate u-pl9x"><a class="InlineList-item-text" data-has-card-for-ri="27363" rel="nofollow" href="https://www.academia.edu/Documents/in/Poland">Poland</a>, <script data-card-contents-for-ri="27363" type="text/json">{"id":27363,"name":"Poland","url":"https://www.academia.edu/Documents/in/Poland?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="59746" rel="nofollow" href="https://www.academia.edu/Documents/in/Electrocardiology">Electrocardiology</a>, <script data-card-contents-for-ri="59746" type="text/json">{"id":59746,"name":"Electrocardiology","url":"https://www.academia.edu/Documents/in/Electrocardiology?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="289271" rel="nofollow" href="https://www.academia.edu/Documents/in/Aged">Aged</a>, <script data-card-contents-for-ri="289271" type="text/json">{"id":289271,"name":"Aged","url":"https://www.academia.edu/Documents/in/Aged?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="681783" rel="nofollow" href="https://www.academia.edu/Documents/in/Ear_Ossicles">Ear Ossicles</a><script data-card-contents-for-ri="681783" type="text/json">{"id":681783,"name":"Ear Ossicles","url":"https://www.academia.edu/Documents/in/Ear_Ossicles?f_ri=1010378","nofollow":true}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=17013932]'), work: {"id":17013932,"title":"Przydatność badania ruchomości okienka okrągłego za pomocą Laser Doppler Vibrometer w ocenie rekonstrukcji łańcucha kosteczek słuchowych w tympanoplastykach typu zamkniętego","created_at":"2015-10-19T16:23:29.934-07:00","url":"https://www.academia.edu/17013932/Przydatno%C5%9B%C4%87_badania_ruchomo%C5%9Bci_okienka_okr%C4%85g%C5%82ego_za_pomoc%C4%85_Laser_Doppler_Vibrometer_w_ocenie_rekonstrukcji_%C5%82a%C5%84cucha_kosteczek_s%C5%82uchowych_w_tympanoplastykach_typu_zamkni%C4%99tego?f_ri=1010378","dom_id":"work_17013932","summary":"Round window's movability measurements with helping of LDV in evaluation of ossicular chain functioning.Quantitive evaluation of round window movability in normal conditions and after malleus stapes assembly reconstruction were aims of the study.In the experiment there were taken 10 non-frozen temporal bones harvested within 48 hours.Temporal bones specimens were prepared like in closed technique with antromastoidectomy and large posterior tympanotomy. Hearing system before and after MSA reconstruction were evaluated by measurement of round window movement. Measurements were performed at four frequencies: 1000 Hz, 2000 Hz, 4000 Hz, 8000 Hz.In the normal ossicular chain the biggest movability were stated at frequency of 1 kHz. After reconstruction at all frequencies measurements were significantly worse. In reconstructed ears the highest movabilities were stated at frequencies 2000 Hz and 4000 Hz.Round window movability could be measured by Laser Doppler Vibrometry in posterior tympanotomy approach. Before reconstruction the biggest movability were evaluated at 1000 Hz and after MSA at 2000 Hz.","downloadable_attachments":[{"id":42358281,"asset_id":17013932,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":36555457,"first_name":"Krzysztof","last_name":"Morawski","domain_name":"wum","page_name":"KrzysztofMorawski","display_name":"Krzysztof Morawski","profile_url":"https://wum.academia.edu/KrzysztofMorawski?f_ri=1010378","photo":"/images/s65_no_pic.png"}],"research_interests":[{"id":27363,"name":"Poland","url":"https://www.academia.edu/Documents/in/Poland?f_ri=1010378","nofollow":true},{"id":59746,"name":"Electrocardiology","url":"https://www.academia.edu/Documents/in/Electrocardiology?f_ri=1010378","nofollow":true},{"id":289271,"name":"Aged","url":"https://www.academia.edu/Documents/in/Aged?f_ri=1010378","nofollow":true},{"id":681783,"name":"Ear Ossicles","url":"https://www.academia.edu/Documents/in/Ear_Ossicles?f_ri=1010378","nofollow":true},{"id":815168,"name":"Temporal Bone","url":"https://www.academia.edu/Documents/in/Temporal_Bone?f_ri=1010378"},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378"},{"id":1665885,"name":"Laser Doppler Flowmetry","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Flowmetry?f_ri=1010378"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_20083585" data-work_id="20083585" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/20083585/Structural_health_monitoring_techniques_for_wind_turbine_blades">Structural health monitoring techniques for wind turbine blades</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">Wind turbine blades are made of "berglass material to be cost e!ective, but they can be damaged by moisture absorption, fatigue, wind gusts or lightening strikes. It is important to detect the damage before the blade fails... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_20083585" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">Wind turbine blades are made of "berglass material to be cost e!ective, but they can be damaged by moisture absorption, fatigue, wind gusts or lightening strikes. It is important to detect the damage before the blade fails catastrophically which could destroy the entire wind turbine. In this paper, four di!erent algorithms are tested for detecting damage on wind turbine blades. These are the transmittance function, resonant comparison, operational de#ection shape, and wave propagation methods. The methods are all based on measuring the vibration response of the blade when it is excited using piezoceramic actuator patches bonded to the blade. The vibration response of the blade is measured using either piezoceramic sensor patches bonded to the blade, or a scanning laser doppler vibrometer. The sensitivity of the techniques to detect a reversible damage simulated by a steel plate clamped to a section of a wind turbine blade is compared in this paper.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/20083585" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="3cea32beaf87a61c68cf1e1362e22c43" rel="nofollow" data-download="{"attachment_id":41992451,"asset_id":20083585,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/41992451/download_file?st=MTc0MDg3MDkyMCw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="41089142" href="https://uncg.academia.edu/MarkSchulz">Mark Schulz</a><script data-card-contents-for-user="41089142" type="text/json">{"id":41089142,"first_name":"Mark","last_name":"Schulz","domain_name":"uncg","page_name":"MarkSchulz","display_name":"Mark Schulz","profile_url":"https://uncg.academia.edu/MarkSchulz?f_ri=1010378","photo":"https://0.academia-photos.com/41089142/11156988/12450558/s65_mark.schulz.jpg"}</script></span></span></li><li class="js-paper-rank-work_20083585 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="20083585"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 20083585, container: ".js-paper-rank-work_20083585", }); });</script></li><li class="js-percentile-work_20083585 InlineList-item InlineList-item--bordered hidden u-tcGrayDark"><span class="percentile-widget hidden"><span class="u-mr2x percentile-widget" style="display: none">•</span><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 20083585; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-percentile-work_20083585"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></li><li class="js-view-count-work_20083585 InlineList-item InlineList-item--bordered hidden"><div><span><span class="js-view-count view-count u-mr2x" data-work-id="20083585"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 20083585; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=20083585]").text(description); $(".js-view-count-work_20083585").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_20083585").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="20083585"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">8</a>  </div><span class="InlineList-item-text u-textTruncate u-pl9x"><a class="InlineList-item-text" data-has-card-for-ri="60" rel="nofollow" href="https://www.academia.edu/Documents/in/Mechanical_Engineering">Mechanical Engineering</a>, <script data-card-contents-for-ri="60" type="text/json">{"id":60,"name":"Mechanical Engineering","url":"https://www.academia.edu/Documents/in/Mechanical_Engineering?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="73" rel="nofollow" href="https://www.academia.edu/Documents/in/Civil_Engineering">Civil Engineering</a>, <script data-card-contents-for-ri="73" type="text/json">{"id":73,"name":"Civil Engineering","url":"https://www.academia.edu/Documents/in/Civil_Engineering?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="14081" rel="nofollow" href="https://www.academia.edu/Documents/in/Structural_Health_Monitoring">Structural Health Monitoring</a>, <script data-card-contents-for-ri="14081" type="text/json">{"id":14081,"name":"Structural Health Monitoring","url":"https://www.academia.edu/Documents/in/Structural_Health_Monitoring?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="69575" rel="nofollow" href="https://www.academia.edu/Documents/in/Wind_turbine">Wind turbine</a><script data-card-contents-for-ri="69575" type="text/json">{"id":69575,"name":"Wind turbine","url":"https://www.academia.edu/Documents/in/Wind_turbine?f_ri=1010378","nofollow":true}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=20083585]'), work: {"id":20083585,"title":"Structural health monitoring techniques for wind turbine blades","created_at":"2016-01-07T09:06:47.158-08:00","url":"https://www.academia.edu/20083585/Structural_health_monitoring_techniques_for_wind_turbine_blades?f_ri=1010378","dom_id":"work_20083585","summary":"Wind turbine blades are made of \"berglass material to be cost e!ective, but they can be damaged by moisture absorption, fatigue, wind gusts or lightening strikes. It is important to detect the damage before the blade fails catastrophically which could destroy the entire wind turbine. In this paper, four di!erent algorithms are tested for detecting damage on wind turbine blades. These are the transmittance function, resonant comparison, operational de#ection shape, and wave propagation methods. The methods are all based on measuring the vibration response of the blade when it is excited using piezoceramic actuator patches bonded to the blade. The vibration response of the blade is measured using either piezoceramic sensor patches bonded to the blade, or a scanning laser doppler vibrometer. The sensitivity of the techniques to detect a reversible damage simulated by a steel plate clamped to a section of a wind turbine blade is compared in this paper.","downloadable_attachments":[{"id":41992451,"asset_id":20083585,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":41089142,"first_name":"Mark","last_name":"Schulz","domain_name":"uncg","page_name":"MarkSchulz","display_name":"Mark Schulz","profile_url":"https://uncg.academia.edu/MarkSchulz?f_ri=1010378","photo":"https://0.academia-photos.com/41089142/11156988/12450558/s65_mark.schulz.jpg"}],"research_interests":[{"id":60,"name":"Mechanical Engineering","url":"https://www.academia.edu/Documents/in/Mechanical_Engineering?f_ri=1010378","nofollow":true},{"id":73,"name":"Civil Engineering","url":"https://www.academia.edu/Documents/in/Civil_Engineering?f_ri=1010378","nofollow":true},{"id":14081,"name":"Structural Health Monitoring","url":"https://www.academia.edu/Documents/in/Structural_Health_Monitoring?f_ri=1010378","nofollow":true},{"id":69575,"name":"Wind turbine","url":"https://www.academia.edu/Documents/in/Wind_turbine?f_ri=1010378","nofollow":true},{"id":163173,"name":"Wind","url":"https://www.academia.edu/Documents/in/Wind?f_ri=1010378"},{"id":165565,"name":"Cost effectiveness","url":"https://www.academia.edu/Documents/in/Cost_effectiveness?f_ri=1010378"},{"id":260010,"name":"Wave propagation","url":"https://www.academia.edu/Documents/in/Wave_propagation?f_ri=1010378"},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_16875856" data-work_id="16875856" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/16875856/Acoustic_source_identification_using_a_scanning_laser_Doppler_vibrometer">Acoustic source identification using a scanning laser Doppler vibrometer</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">This paper shows how a scanning laser Doppler vibrometer (LDV), an instrument designed to measure vibrations of structures or objects, can be used in a non-traditional fashion to identify acoustical sources. This is achieved by measuring... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_16875856" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">This paper shows how a scanning laser Doppler vibrometer (LDV), an instrument designed to measure vibrations of structures or objects, can be used in a non-traditional fashion to identify acoustical sources. This is achieved by measuring the changes in the optical path induced by local fluctuation of the air refraction index to which the LDV is sensitive. The acoustical signal used is sinusoidal and may be recovered by scanning at a uniform rate over a subject area (continuous scan) parallel to the source axis and demodulating this signal. Due to the fact that the measured scan area is in fact a line integral over a measurement volume between the laser head and a rigid object needed to reflect the laser beam, multiple view planes around the axis of the acoustic source are usually measured. These are then passed through a tomographic algorithm, thereby reconstructing the full sound field. In this article however, only one view plane is measured, but the acoustic source is placed on a rotating surface with fixed rotational frequency, thereby imposing a modulation on the measured spectrum. Demodulation will allow reconstruction of the three-dimensional sound field. r</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/16875856" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="c8ea5f0d194240653c6e4f4d1e7a0ca0" rel="nofollow" data-download="{"attachment_id":39232370,"asset_id":16875856,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/39232370/download_file?st=MTc0MDg3MDkyMCw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="36348596" href="https://independent.academia.edu/PatrickGuillaume">Patrick Guillaume</a><script data-card-contents-for-user="36348596" type="text/json">{"id":36348596,"first_name":"Patrick","last_name":"Guillaume","domain_name":"independent","page_name":"PatrickGuillaume","display_name":"Patrick Guillaume","profile_url":"https://independent.academia.edu/PatrickGuillaume?f_ri=1010378","photo":"/images/s65_no_pic.png"}</script></span></span></li><li class="js-paper-rank-work_16875856 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="16875856"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 16875856, container: ".js-paper-rank-work_16875856", }); });</script></li><li class="js-percentile-work_16875856 InlineList-item InlineList-item--bordered hidden u-tcGrayDark"><span class="percentile-widget hidden"><span class="u-mr2x percentile-widget" style="display: none">•</span><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 16875856; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-percentile-work_16875856"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></li><li class="js-view-count-work_16875856 InlineList-item InlineList-item--bordered hidden"><div><span><span class="js-view-count view-count u-mr2x" data-work-id="16875856"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 16875856; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=16875856]").text(description); $(".js-view-count-work_16875856").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_16875856").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="16875856"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">2</a>  </div><span class="InlineList-item-text u-textTruncate u-pl9x"><a class="InlineList-item-text" data-has-card-for-ri="263152" rel="nofollow" href="https://www.academia.edu/Documents/in/Optical_physics">Optical physics</a>, <script data-card-contents-for-ri="263152" type="text/json">{"id":263152,"name":"Optical physics","url":"https://www.academia.edu/Documents/in/Optical_physics?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="1010378" rel="nofollow" href="https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer">Laser Doppler Vibrometer</a><script data-card-contents-for-ri="1010378" type="text/json">{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378","nofollow":true}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=16875856]'), work: {"id":16875856,"title":"Acoustic source identification using a scanning laser Doppler vibrometer","created_at":"2015-10-16T07:05:09.751-07:00","url":"https://www.academia.edu/16875856/Acoustic_source_identification_using_a_scanning_laser_Doppler_vibrometer?f_ri=1010378","dom_id":"work_16875856","summary":"This paper shows how a scanning laser Doppler vibrometer (LDV), an instrument designed to measure vibrations of structures or objects, can be used in a non-traditional fashion to identify acoustical sources. This is achieved by measuring the changes in the optical path induced by local fluctuation of the air refraction index to which the LDV is sensitive. The acoustical signal used is sinusoidal and may be recovered by scanning at a uniform rate over a subject area (continuous scan) parallel to the source axis and demodulating this signal. Due to the fact that the measured scan area is in fact a line integral over a measurement volume between the laser head and a rigid object needed to reflect the laser beam, multiple view planes around the axis of the acoustic source are usually measured. These are then passed through a tomographic algorithm, thereby reconstructing the full sound field. In this article however, only one view plane is measured, but the acoustic source is placed on a rotating surface with fixed rotational frequency, thereby imposing a modulation on the measured spectrum. Demodulation will allow reconstruction of the three-dimensional sound field. r","downloadable_attachments":[{"id":39232370,"asset_id":16875856,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":36348596,"first_name":"Patrick","last_name":"Guillaume","domain_name":"independent","page_name":"PatrickGuillaume","display_name":"Patrick Guillaume","profile_url":"https://independent.academia.edu/PatrickGuillaume?f_ri=1010378","photo":"/images/s65_no_pic.png"}],"research_interests":[{"id":263152,"name":"Optical physics","url":"https://www.academia.edu/Documents/in/Optical_physics?f_ri=1010378","nofollow":true},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378","nofollow":true}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_48030268" data-work_id="48030268" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/48030268/Operational_Modal_Analysis_of_a_rotating_tyre_subject_to_cleat_excitation">Operational Modal Analysis of a rotating tyre subject to cleat excitation</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">Structure-borne tyre/road noise is an important component of the perceived noise annoyance of passenger cars. More in particular, it was observed that crossing road surface discontinuities (e.g. concrete road surface joints, railroad... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_48030268" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">Structure-borne tyre/road noise is an important component of the perceived noise annoyance of passenger cars. More in particular, it was observed that crossing road surface discontinuities (e.g. concrete road surface joints, railroad crossing, potholes, …) causes a significant increase in instantaneous exterior noise level. In addition, it has an adverse effect on the interior vehicle NVH in the sense that the passengers experience high-amplitude transient noise and vibrations. Therefore, an extensive research programme was established at the Department of Mechanical Engineering, K.U.Leuven, to study structure-borne tyre/road noise due to road surface discontinuities. As part of the research activities, an original test setup for impact tyre/road noise was developed so that rolling tyre vibrations, radiated noise and dynamic spindle forces could be measured at different rolling speeds. The test setup is based on the tyre-on-tyre principle and a cleat is used to reproduce a road surface discontinuity. This paper concentrates on the data processing techniques used to experimentally obtain the modes of a rolling tyre. Since the forces introduced by the cleat cannot me measured, Operational Modal Analysis was selected as processing technique. A major challenge is the requirement to obtain spatial information on the tire from a single-point measurement device. Therefore, a dedicated triggering and time-domain averaging procedure was elaborated. The purpose of averaging is obviously to reduce random noise whereas triggering is required to be able to correlate different tyre locations that have not been measured at the same time (a singlepoint Laser Doppler Vibrometer was used).</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/48030268" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="444b8bd9fa609bdf9e30c564ef765d8d" rel="nofollow" data-download="{"attachment_id":66853864,"asset_id":48030268,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/66853864/download_file?st=MTc0MDg3MDkyMCw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="188373930" href="https://independent.academia.edu/HVanderAuweraer">Herman Van der Auweraer</a><script data-card-contents-for-user="188373930" type="text/json">{"id":188373930,"first_name":"Herman","last_name":"Van der Auweraer","domain_name":"independent","page_name":"HVanderAuweraer","display_name":"Herman Van der Auweraer","profile_url":"https://independent.academia.edu/HVanderAuweraer?f_ri=1010378","photo":"https://0.academia-photos.com/188373930/124963911/114325279/s65_herman.van_der_auweraer.png"}</script></span></span></li><li class="js-paper-rank-work_48030268 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="48030268"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 48030268, container: ".js-paper-rank-work_48030268", }); });</script></li><li class="js-percentile-work_48030268 InlineList-item InlineList-item--bordered hidden u-tcGrayDark"><span class="percentile-widget hidden"><span class="u-mr2x percentile-widget" style="display: none">•</span><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 48030268; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-percentile-work_48030268"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></li><li class="js-view-count-work_48030268 InlineList-item InlineList-item--bordered hidden"><div><span><span class="js-view-count view-count u-mr2x" data-work-id="48030268"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 48030268; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=48030268]").text(description); $(".js-view-count-work_48030268").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_48030268").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="48030268"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">8</a>  </div><span class="InlineList-item-text u-textTruncate u-pl9x"><a class="InlineList-item-text" data-has-card-for-ri="60" rel="nofollow" href="https://www.academia.edu/Documents/in/Mechanical_Engineering">Mechanical Engineering</a>, <script data-card-contents-for-ri="60" type="text/json">{"id":60,"name":"Mechanical Engineering","url":"https://www.academia.edu/Documents/in/Mechanical_Engineering?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="138520" rel="nofollow" href="https://www.academia.edu/Documents/in/Spatial_Information">Spatial Information</a>, <script data-card-contents-for-ri="138520" type="text/json">{"id":138520,"name":"Spatial Information","url":"https://www.academia.edu/Documents/in/Spatial_Information?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="250422" rel="nofollow" href="https://www.academia.edu/Documents/in/Random_Noise">Random Noise</a>, <script data-card-contents-for-ri="250422" type="text/json">{"id":250422,"name":"Random Noise","url":"https://www.academia.edu/Documents/in/Random_Noise?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="507797" rel="nofollow" href="https://www.academia.edu/Documents/in/Operational_modal_analysis">Operational modal analysis</a><script data-card-contents-for-ri="507797" type="text/json">{"id":507797,"name":"Operational modal analysis","url":"https://www.academia.edu/Documents/in/Operational_modal_analysis?f_ri=1010378","nofollow":true}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=48030268]'), work: {"id":48030268,"title":"Operational Modal Analysis of a rotating tyre subject to cleat excitation","created_at":"2021-05-03T23:28:12.651-07:00","url":"https://www.academia.edu/48030268/Operational_Modal_Analysis_of_a_rotating_tyre_subject_to_cleat_excitation?f_ri=1010378","dom_id":"work_48030268","summary":"Structure-borne tyre/road noise is an important component of the perceived noise annoyance of passenger cars. More in particular, it was observed that crossing road surface discontinuities (e.g. concrete road surface joints, railroad crossing, potholes, …) causes a significant increase in instantaneous exterior noise level. In addition, it has an adverse effect on the interior vehicle NVH in the sense that the passengers experience high-amplitude transient noise and vibrations. Therefore, an extensive research programme was established at the Department of Mechanical Engineering, K.U.Leuven, to study structure-borne tyre/road noise due to road surface discontinuities. As part of the research activities, an original test setup for impact tyre/road noise was developed so that rolling tyre vibrations, radiated noise and dynamic spindle forces could be measured at different rolling speeds. The test setup is based on the tyre-on-tyre principle and a cleat is used to reproduce a road surface discontinuity. This paper concentrates on the data processing techniques used to experimentally obtain the modes of a rolling tyre. Since the forces introduced by the cleat cannot me measured, Operational Modal Analysis was selected as processing technique. A major challenge is the requirement to obtain spatial information on the tire from a single-point measurement device. Therefore, a dedicated triggering and time-domain averaging procedure was elaborated. The purpose of averaging is obviously to reduce random noise whereas triggering is required to be able to correlate different tyre locations that have not been measured at the same time (a singlepoint Laser Doppler Vibrometer was used).","downloadable_attachments":[{"id":66853864,"asset_id":48030268,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":188373930,"first_name":"Herman","last_name":"Van der Auweraer","domain_name":"independent","page_name":"HVanderAuweraer","display_name":"Herman Van der Auweraer","profile_url":"https://independent.academia.edu/HVanderAuweraer?f_ri=1010378","photo":"https://0.academia-photos.com/188373930/124963911/114325279/s65_herman.van_der_auweraer.png"}],"research_interests":[{"id":60,"name":"Mechanical Engineering","url":"https://www.academia.edu/Documents/in/Mechanical_Engineering?f_ri=1010378","nofollow":true},{"id":138520,"name":"Spatial Information","url":"https://www.academia.edu/Documents/in/Spatial_Information?f_ri=1010378","nofollow":true},{"id":250422,"name":"Random Noise","url":"https://www.academia.edu/Documents/in/Random_Noise?f_ri=1010378","nofollow":true},{"id":507797,"name":"Operational modal analysis","url":"https://www.academia.edu/Documents/in/Operational_modal_analysis?f_ri=1010378","nofollow":true},{"id":581652,"name":"Data Processing","url":"https://www.academia.edu/Documents/in/Data_Processing?f_ri=1010378"},{"id":991005,"name":"Time Domain","url":"https://www.academia.edu/Documents/in/Time_Domain?f_ri=1010378"},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378"},{"id":2601211,"name":"Adverse effect","url":"https://www.academia.edu/Documents/in/Adverse_effect?f_ri=1010378"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_29930676" data-work_id="29930676" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/29930676/Fluid_volume_displacement_at_the_oval_and_round_windows_with_air_and_bone_conduction_stimulation">Fluid volume displacement at the oval and round windows with air and bone conduction stimulation</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">The fluids in the cochlea are normally considered incompressible, and the fluid volume displacement of the oval window (OW) and the round window (RW) should be equal and of opposite phase. However, other channels, such as the cochlear and... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_29930676" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">The fluids in the cochlea are normally considered incompressible, and the fluid volume displacement of the oval window (OW) and the round window (RW) should be equal and of opposite phase. However, other channels, such as the cochlear and vestibular aqueducts, may affect the fluid flow. To test if the OW and RW fluid flows are equal and of opposite</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/29930676" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="a56c5e18370f48703b933069b606e9a2" rel="nofollow" data-download="{"attachment_id":50389876,"asset_id":29930676,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/50389876/download_file?st=MTc0MDg3MDkyMCw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="56845161" href="https://independent.academia.edu/StefanStenfelt">Stefan Stenfelt</a><script data-card-contents-for-user="56845161" type="text/json">{"id":56845161,"first_name":"Stefan","last_name":"Stenfelt","domain_name":"independent","page_name":"StefanStenfelt","display_name":"Stefan Stenfelt","profile_url":"https://independent.academia.edu/StefanStenfelt?f_ri=1010378","photo":"/images/s65_no_pic.png"}</script></span></span></li><li class="js-paper-rank-work_29930676 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="29930676"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 29930676, container: ".js-paper-rank-work_29930676", }); 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$(".js-view-count[data-work-id=29930676]").text(description); $(".js-view-count-work_29930676").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_29930676").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="29930676"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">13</a>  </div><span class="InlineList-item-text u-textTruncate u-pl10x"><a class="InlineList-item-text" data-has-card-for-ri="8139" rel="nofollow" href="https://www.academia.edu/Documents/in/Compliance">Compliance</a>, <script data-card-contents-for-ri="8139" type="text/json">{"id":8139,"name":"Compliance","url":"https://www.academia.edu/Documents/in/Compliance?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="16496" rel="nofollow" href="https://www.academia.edu/Documents/in/Fluid_Dynamics">Fluid Dynamics</a>, <script data-card-contents-for-ri="16496" type="text/json">{"id":16496,"name":"Fluid Dynamics","url":"https://www.academia.edu/Documents/in/Fluid_Dynamics?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="28235" rel="nofollow" href="https://www.academia.edu/Documents/in/Multidisciplinary">Multidisciplinary</a>, <script data-card-contents-for-ri="28235" type="text/json">{"id":28235,"name":"Multidisciplinary","url":"https://www.academia.edu/Documents/in/Multidisciplinary?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="59693" rel="nofollow" href="https://www.academia.edu/Documents/in/Hearing">Hearing</a><script data-card-contents-for-ri="59693" type="text/json">{"id":59693,"name":"Hearing","url":"https://www.academia.edu/Documents/in/Hearing?f_ri=1010378","nofollow":true}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=29930676]'), work: {"id":29930676,"title":"Fluid volume displacement at the oval and round windows with air and bone conduction stimulation","created_at":"2016-11-17T23:13:01.770-08:00","url":"https://www.academia.edu/29930676/Fluid_volume_displacement_at_the_oval_and_round_windows_with_air_and_bone_conduction_stimulation?f_ri=1010378","dom_id":"work_29930676","summary":"The fluids in the cochlea are normally considered incompressible, and the fluid volume displacement of the oval window (OW) and the round window (RW) should be equal and of opposite phase. However, other channels, such as the cochlear and vestibular aqueducts, may affect the fluid flow. To test if the OW and RW fluid flows are equal and of opposite","downloadable_attachments":[{"id":50389876,"asset_id":29930676,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":56845161,"first_name":"Stefan","last_name":"Stenfelt","domain_name":"independent","page_name":"StefanStenfelt","display_name":"Stefan Stenfelt","profile_url":"https://independent.academia.edu/StefanStenfelt?f_ri=1010378","photo":"/images/s65_no_pic.png"}],"research_interests":[{"id":8139,"name":"Compliance","url":"https://www.academia.edu/Documents/in/Compliance?f_ri=1010378","nofollow":true},{"id":16496,"name":"Fluid Dynamics","url":"https://www.academia.edu/Documents/in/Fluid_Dynamics?f_ri=1010378","nofollow":true},{"id":28235,"name":"Multidisciplinary","url":"https://www.academia.edu/Documents/in/Multidisciplinary?f_ri=1010378","nofollow":true},{"id":59693,"name":"Hearing","url":"https://www.academia.edu/Documents/in/Hearing?f_ri=1010378","nofollow":true},{"id":154341,"name":"Pitch Perception","url":"https://www.academia.edu/Documents/in/Pitch_Perception?f_ri=1010378"},{"id":215076,"name":"Fluid flow","url":"https://www.academia.edu/Documents/in/Fluid_flow?f_ri=1010378"},{"id":289271,"name":"Aged","url":"https://www.academia.edu/Documents/in/Aged?f_ri=1010378"},{"id":815168,"name":"Temporal Bone","url":"https://www.academia.edu/Documents/in/Temporal_Bone?f_ri=1010378"},{"id":991233,"name":"Bone Conduction","url":"https://www.academia.edu/Documents/in/Bone_Conduction?f_ri=1010378"},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378"},{"id":1309909,"name":"Hydrostatic Pressure","url":"https://www.academia.edu/Documents/in/Hydrostatic_Pressure?f_ri=1010378"},{"id":1746782,"name":"Tympanic Membrane","url":"https://www.academia.edu/Documents/in/Tympanic_Membrane?f_ri=1010378"},{"id":2428413,"name":"Acoustic Stimulation","url":"https://www.academia.edu/Documents/in/Acoustic_Stimulation?f_ri=1010378"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_28507559" data-work_id="28507559" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/28507559/Piezoelectric_active_mirror_suspension_embedded_into_Low_Temperature_Co_fired_Ceramic">Piezoelectric active mirror suspension embedded into Low Temperature Co-fired Ceramic</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">Low Temperature Co-fired Ceramic (LTCC) has proven to be a cost effective and flexible technology for producing complicated structures: sensors, actuators and microsystems. In this paper, piezoelectric active mirror suspension embedded... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_28507559" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">Low Temperature Co-fired Ceramic (LTCC) has proven to be a cost effective and flexible technology for producing complicated structures: sensors, actuators and microsystems. In this paper, piezoelectric active mirror suspension embedded into L TCC is presented. In the structure the LTCC was used as a package, passive layers of piezoelectric monomorphs, support for the mirrors and substrate for conductors. Active mirror structure, 17 mm in diameter, was made by compiling 20 layers using standard L TCC processing techniques. Each sample contained a laser micromachined bulk PZT structure which formed a monomorph with LTCC during the firing process. A mirror substrate (0 4mm) was mounted in the middle of the monomorph arms for evaluation of positioning performance where each of the three arms had independent signal electrodes and a common ground electrode. Electrical and electromechanical properties were investigated with LCR meter, network analyser and laser vibrometer for diff erent arms and the mirror. Active mirror structure exhibited over 1 JIm DC displacement for mirror leveling allowing also small changes in mirror angle up to 0.06°. First bending resonance frequency of the structure with the mirror was detected at 11.31 kHz with 4.0 JIm displacement while 13.02 kHz and 2. 7 JIm was obtained without the mirror. The structure exhibited feasible characteristics for further utilization as tunable Fabry-Perot filter applications, allowing mounting of two active mirrors on both sides with distance and angle control.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/28507559" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="4538219abbf01bc3586b219a74d3a41a" rel="nofollow" data-download="{"attachment_id":48856432,"asset_id":28507559,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/48856432/download_file?st=MTc0MDg3MDkyMCw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="53462790" href="https://independent.academia.edu/JJuuti">J. Juuti</a><script data-card-contents-for-user="53462790" type="text/json">{"id":53462790,"first_name":"J.","last_name":"Juuti","domain_name":"independent","page_name":"JJuuti","display_name":"J. 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In this paper, piezoelectric active mirror suspension embedded into L TCC is presented. In the structure the LTCC was used as a package, passive layers of piezoelectric monomorphs, support for the mirrors and substrate for conductors. Active mirror structure, 17 mm in diameter, was made by compiling 20 layers using standard L TCC processing techniques. Each sample contained a laser micromachined bulk PZT structure which formed a monomorph with LTCC during the firing process. A mirror substrate (0 4mm) was mounted in the middle of the monomorph arms for evaluation of positioning performance where each of the three arms had independent signal electrodes and a common ground electrode. Electrical and electromechanical properties were investigated with LCR meter, network analyser and laser vibrometer for diff erent arms and the mirror. Active mirror structure exhibited over 1 JIm DC displacement for mirror leveling allowing also small changes in mirror angle up to 0.06°. First bending resonance frequency of the structure with the mirror was detected at 11.31 kHz with 4.0 JIm displacement while 13.02 kHz and 2. 7 JIm was obtained without the mirror. The structure exhibited feasible characteristics for further utilization as tunable Fabry-Perot filter applications, allowing mounting of two active mirrors on both sides with distance and angle control.","downloadable_attachments":[{"id":48856432,"asset_id":28507559,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":53462790,"first_name":"J.","last_name":"Juuti","domain_name":"independent","page_name":"JJuuti","display_name":"J. Juuti","profile_url":"https://independent.academia.edu/JJuuti?f_ri=1010378","photo":"/images/s65_no_pic.png"}],"research_interests":[{"id":73321,"name":"Common Ground","url":"https://www.academia.edu/Documents/in/Common_Ground?f_ri=1010378","nofollow":true},{"id":139778,"name":"Dielectrics","url":"https://www.academia.edu/Documents/in/Dielectrics?f_ri=1010378","nofollow":true},{"id":165565,"name":"Cost effectiveness","url":"https://www.academia.edu/Documents/in/Cost_effectiveness?f_ri=1010378","nofollow":true},{"id":250448,"name":"Impedance","url":"https://www.academia.edu/Documents/in/Impedance?f_ri=1010378","nofollow":true},{"id":617604,"name":"Piezoelectricity","url":"https://www.academia.edu/Documents/in/Piezoelectricity?f_ri=1010378"},{"id":649051,"name":"Piezoelectric","url":"https://www.academia.edu/Documents/in/Piezoelectric?f_ri=1010378"},{"id":739251,"name":"Lcr Meter","url":"https://www.academia.edu/Documents/in/Lcr_Meter?f_ri=1010378"},{"id":739254,"name":"Fabry Perot","url":"https://www.academia.edu/Documents/in/Fabry_Perot?f_ri=1010378"},{"id":846015,"name":"Electrodes","url":"https://www.academia.edu/Documents/in/Electrodes?f_ri=1010378"},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378"},{"id":1275385,"name":"Laser Micromachining","url":"https://www.academia.edu/Documents/in/Laser_Micromachining?f_ri=1010378"},{"id":1843318,"name":"Lamination","url":"https://www.academia.edu/Documents/in/Lamination?f_ri=1010378"},{"id":2168952,"name":"Resonant Frequency","url":"https://www.academia.edu/Documents/in/Resonant_Frequency?f_ri=1010378"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_27368352" data-work_id="27368352" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/27368352/Automotive_components_vibration_measurements_by_tracking_laser_Doppler_vibrometry_advances_in_signal_processing">Automotive components vibration measurements by tracking laser Doppler vibrometry: advances in signal processing</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">This paper describes the application of a tracking laser Doppler vibrometer (TLDV) for vibration measurements on automotive components and the advances in data processing. A Lagrangian approach is adopted: the target point moves... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_27368352" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">This paper describes the application of a tracking laser Doppler vibrometer (TLDV) for vibration measurements on automotive components and the advances in data processing. A Lagrangian approach is adopted: the target point moves continuously and it is tracked by the measurement laser spot, thus no relative velocity between the target and the laser spot exists. By eliminating the relative motion of the laser beam on the surface, speckle noise is drastically reduced. Measuring on a moving reference frame opens an innovative way to look at automotive component vibrations, because the space-time evolution of the vibration can be measured under simulated operative conditions. After a presentation and discussion of the measurement technique, attention is focused on three different applications in the automotive field: the side-wall vibration of a rolling tyre, the out-of-plane vibration of a timing belt and the rubber blade vibration of complex motion windscreen wipers. The development of optimized TLDV measurement systems for each specific application is shown and some results are presented.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/27368352" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="67462c7e101818182aa31fac6ca274f7" rel="nofollow" data-download="{"attachment_id":47623094,"asset_id":27368352,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/47623094/download_file?st=MTc0MDg3MDkyMCw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="51449128" href="https://independent.academia.edu/Montanini">R. Montanini</a><script data-card-contents-for-user="51449128" type="text/json">{"id":51449128,"first_name":"R.","last_name":"Montanini","domain_name":"independent","page_name":"Montanini","display_name":"R. 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A Lagrangian approach is adopted: the target point moves continuously and it is tracked by the measurement laser spot, thus no relative velocity between the target and the laser spot exists. By eliminating the relative motion of the laser beam on the surface, speckle noise is drastically reduced. Measuring on a moving reference frame opens an innovative way to look at automotive component vibrations, because the space-time evolution of the vibration can be measured under simulated operative conditions. After a presentation and discussion of the measurement technique, attention is focused on three different applications in the automotive field: the side-wall vibration of a rolling tyre, the out-of-plane vibration of a timing belt and the rubber blade vibration of complex motion windscreen wipers. The development of optimized TLDV measurement systems for each specific application is shown and some results are presented.","downloadable_attachments":[{"id":47623094,"asset_id":27368352,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":51449128,"first_name":"R.","last_name":"Montanini","domain_name":"independent","page_name":"Montanini","display_name":"R. Montanini","profile_url":"https://independent.academia.edu/Montanini?f_ri=1010378","photo":"/images/s65_no_pic.png"}],"research_interests":[{"id":48,"name":"Engineering","url":"https://www.academia.edu/Documents/in/Engineering?f_ri=1010378","nofollow":true},{"id":2141,"name":"Signal Processing","url":"https://www.academia.edu/Documents/in/Signal_Processing?f_ri=1010378","nofollow":true},{"id":42620,"name":"Time-Frequency Analysis","url":"https://www.academia.edu/Documents/in/Time-Frequency_Analysis?f_ri=1010378","nofollow":true},{"id":71793,"name":"Measurement Science and Technology","url":"https://www.academia.edu/Documents/in/Measurement_Science_and_Technology?f_ri=1010378","nofollow":true},{"id":93023,"name":"Laser Doppler Vibrometry","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometry?f_ri=1010378"},{"id":118582,"name":"Physical sciences","url":"https://www.academia.edu/Documents/in/Physical_sciences?f_ri=1010378"},{"id":154543,"name":"Space Time","url":"https://www.academia.edu/Documents/in/Space_Time?f_ri=1010378"},{"id":222327,"name":"Reference Frame","url":"https://www.academia.edu/Documents/in/Reference_Frame?f_ri=1010378"},{"id":394477,"name":"Time Dependent","url":"https://www.academia.edu/Documents/in/Time_Dependent?f_ri=1010378"},{"id":477865,"name":"Operant Conditioning","url":"https://www.academia.edu/Documents/in/Operant_Conditioning?f_ri=1010378"},{"id":557534,"name":"Speckle noise","url":"https://www.academia.edu/Documents/in/Speckle_noise?f_ri=1010378"},{"id":581652,"name":"Data Processing","url":"https://www.academia.edu/Documents/in/Data_Processing?f_ri=1010378"},{"id":978574,"name":"Measurement Science","url":"https://www.academia.edu/Documents/in/Measurement_Science?f_ri=1010378"},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378"},{"id":1625072,"name":"Frequency Domain","url":"https://www.academia.edu/Documents/in/Frequency_Domain?f_ri=1010378"},{"id":2416066,"name":"Measurement System","url":"https://www.academia.edu/Documents/in/Measurement_System?f_ri=1010378"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_19823991 coauthored" data-work_id="19823991" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/19823991/The_application_of_scanning_vibrometer_in_mapping_ultrasound_fields">The application of scanning vibrometer in mapping ultrasound fields</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">Optical interferometry has been used for calibrating hydrophones at frequencies greater than 500 kHz for many years with very small uncertainties. Optical method have been found to be an effective non-perturbing method for detecting... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_19823991" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">Optical interferometry has been used for calibrating hydrophones at frequencies greater than 500 kHz for many years with very small uncertainties. Optical method have been found to be an effective non-perturbing method for detecting ultrasound fields with very fine spatial and temporal resolution; ultrasound fields can be mapped using a membrane and a scanning vibrometer, and two-dimensional fields can be imaged when the optical beam from a Laser Doppler Vibrometer (LDV) is aligned normal to the axis of the sound beam from a arbitrarily shaped projector. This paper presents a theoretical analyses for using a LDV system to detect ultrasound fields and further presents the result of some initial optical scan measurements performed using an LDV system. Results are presented of the particle velocity distributions produced by a focused ultrasound projector measured using a scanning LDV on an acoustically compliant, optically reflective membrane using a scanning LDV. Further measurement r...</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/19823991" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="77b115181fb0548ca0126a61292fcedb" rel="nofollow" data-download="{"attachment_id":41178228,"asset_id":19823991,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/41178228/download_file?st=MTc0MDg3MDkyMCw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="40586027" href="https://independent.academia.edu/JohnTyrer">John Tyrer</a><script data-card-contents-for-user="40586027" type="text/json">{"id":40586027,"first_name":"John","last_name":"Tyrer","domain_name":"independent","page_name":"JohnTyrer","display_name":"John Tyrer","profile_url":"https://independent.academia.edu/JohnTyrer?f_ri=1010378","photo":"/images/s65_no_pic.png"}</script></span></span><span class="u-displayInlineBlock InlineList-item-text"> and <span class="u-textDecorationUnderline u-clickable InlineList-item-text js-work-more-authors-19823991">+1</span><div class="hidden js-additional-users-19823991"><div><span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a href="https://lboro.academia.edu/PaulLepper">Paul Lepper</a></span></div></div></span><script>(function(){ var popoverSettings = { el: $('.js-work-more-authors-19823991'), placement: 'bottom', hide_delay: 200, html: true, content: function(){ return $('.js-additional-users-19823991').html(); 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Optical method have been found to be an effective non-perturbing method for detecting ultrasound fields with very fine spatial and temporal resolution; ultrasound fields can be mapped using a membrane and a scanning vibrometer, and two-dimensional fields can be imaged when the optical beam from a Laser Doppler Vibrometer (LDV) is aligned normal to the axis of the sound beam from a arbitrarily shaped projector. This paper presents a theoretical analyses for using a LDV system to detect ultrasound fields and further presents the result of some initial optical scan measurements performed using an LDV system. Results are presented of the particle velocity distributions produced by a focused ultrasound projector measured using a scanning LDV on an acoustically compliant, optically reflective membrane using a scanning LDV. Further measurement r...","downloadable_attachments":[{"id":41178228,"asset_id":19823991,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":40586027,"first_name":"John","last_name":"Tyrer","domain_name":"independent","page_name":"JohnTyrer","display_name":"John Tyrer","profile_url":"https://independent.academia.edu/JohnTyrer?f_ri=1010378","photo":"/images/s65_no_pic.png"},{"id":31465728,"first_name":"Paul","last_name":"Lepper","domain_name":"lboro","page_name":"PaulLepper","display_name":"Paul Lepper","profile_url":"https://lboro.academia.edu/PaulLepper?f_ri=1010378","photo":"/images/s65_no_pic.png"}],"research_interests":[{"id":48,"name":"Engineering","url":"https://www.academia.edu/Documents/in/Engineering?f_ri=1010378","nofollow":true},{"id":13839,"name":"Temporal Resolution","url":"https://www.academia.edu/Documents/in/Temporal_Resolution?f_ri=1010378","nofollow":true},{"id":15639,"name":"Ultrasound","url":"https://www.academia.edu/Documents/in/Ultrasound?f_ri=1010378","nofollow":true},{"id":118582,"name":"Physical sciences","url":"https://www.academia.edu/Documents/in/Physical_sciences?f_ri=1010378","nofollow":true},{"id":152198,"name":"Focused Ultrasound","url":"https://www.academia.edu/Documents/in/Focused_Ultrasound?f_ri=1010378"},{"id":280438,"name":"Velocity Distribution in Open Channel","url":"https://www.academia.edu/Documents/in/Velocity_Distribution_in_Open_Channel?f_ri=1010378"},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378"},{"id":1387383,"name":"Acoustic Waves","url":"https://www.academia.edu/Documents/in/Acoustic_Waves?f_ri=1010378"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_16875864" data-work_id="16875864" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/16875864/A_method_for_crack_sizing_using_Laser_Doppler_Vibrometer_measurements_of_Surface_Acoustic_Waves">A method for crack sizing using Laser Doppler Vibrometer measurements of Surface Acoustic Waves</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">The goal of non-destructive testing (NDT) is to determine the position and size of structural defects, in order to measure the quality and evaluate the safety of building materials. Most NDT techniques are rather complex, however,... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_16875864" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">The goal of non-destructive testing (NDT) is to determine the position and size of structural defects, in order to measure the quality and evaluate the safety of building materials. Most NDT techniques are rather complex, however, requiring specialized knowledge. In this article, we introduce an experimental method for crack detection that uses Surface Acoustic Waves (SAWs) and optical measurements. The method is tested on a steel beam engraved with slots of known depth. A simple model to determine the cracks size is also proposed. At the end of the article, we describe a possible application: fatigue crack sizing on a damaged slat track. This technique represents a first step toward a better understanding of the crack growth, especially in its early stages (preferably when the cracks can still be repaired) and when it is possible to assume a linear propagation of the crack front. The ultimate goal of this research program is to develop a useful method of monitoring aircraft components during fatigue testing.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/16875864" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="29344177e77c3e8d6385f16b8bcd64ac" rel="nofollow" data-download="{"attachment_id":39232373,"asset_id":16875864,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/39232373/download_file?st=MTc0MDg3MDkyMCw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="36348596" href="https://independent.academia.edu/PatrickGuillaume">Patrick Guillaume</a><script data-card-contents-for-user="36348596" type="text/json">{"id":36348596,"first_name":"Patrick","last_name":"Guillaume","domain_name":"independent","page_name":"PatrickGuillaume","display_name":"Patrick Guillaume","profile_url":"https://independent.academia.edu/PatrickGuillaume?f_ri=1010378","photo":"/images/s65_no_pic.png"}</script></span></span></li><li class="js-paper-rank-work_16875864 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="16875864"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 16875864, container: ".js-paper-rank-work_16875864", }); 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$(".js-view-count[data-work-id=16875864]").text(description); $(".js-view-count-work_16875864").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_16875864").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="16875864"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">14</a>  </div><span class="InlineList-item-text u-textTruncate u-pl10x"><a class="InlineList-item-text" data-has-card-for-ri="56" rel="nofollow" href="https://www.academia.edu/Documents/in/Materials_Engineering">Materials Engineering</a>, <script data-card-contents-for-ri="56" type="text/json">{"id":56,"name":"Materials Engineering","url":"https://www.academia.edu/Documents/in/Materials_Engineering?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="60" rel="nofollow" href="https://www.academia.edu/Documents/in/Mechanical_Engineering">Mechanical Engineering</a>, <script data-card-contents-for-ri="60" type="text/json">{"id":60,"name":"Mechanical Engineering","url":"https://www.academia.edu/Documents/in/Mechanical_Engineering?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="428" rel="nofollow" href="https://www.academia.edu/Documents/in/Algorithms">Algorithms</a>, <script data-card-contents-for-ri="428" type="text/json">{"id":428,"name":"Algorithms","url":"https://www.academia.edu/Documents/in/Algorithms?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="32896" rel="nofollow" href="https://www.academia.edu/Documents/in/Fatigue_crack_growth">Fatigue crack growth</a><script data-card-contents-for-ri="32896" type="text/json">{"id":32896,"name":"Fatigue crack growth","url":"https://www.academia.edu/Documents/in/Fatigue_crack_growth?f_ri=1010378","nofollow":true}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=16875864]'), work: {"id":16875864,"title":"A method for crack sizing using Laser Doppler Vibrometer measurements of Surface Acoustic Waves","created_at":"2015-10-16T07:05:11.317-07:00","url":"https://www.academia.edu/16875864/A_method_for_crack_sizing_using_Laser_Doppler_Vibrometer_measurements_of_Surface_Acoustic_Waves?f_ri=1010378","dom_id":"work_16875864","summary":"The goal of non-destructive testing (NDT) is to determine the position and size of structural defects, in order to measure the quality and evaluate the safety of building materials. Most NDT techniques are rather complex, however, requiring specialized knowledge. In this article, we introduce an experimental method for crack detection that uses Surface Acoustic Waves (SAWs) and optical measurements. The method is tested on a steel beam engraved with slots of known depth. A simple model to determine the cracks size is also proposed. At the end of the article, we describe a possible application: fatigue crack sizing on a damaged slat track. This technique represents a first step toward a better understanding of the crack growth, especially in its early stages (preferably when the cracks can still be repaired) and when it is possible to assume a linear propagation of the crack front. The ultimate goal of this research program is to develop a useful method of monitoring aircraft components during fatigue testing.","downloadable_attachments":[{"id":39232373,"asset_id":16875864,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":36348596,"first_name":"Patrick","last_name":"Guillaume","domain_name":"independent","page_name":"PatrickGuillaume","display_name":"Patrick Guillaume","profile_url":"https://independent.academia.edu/PatrickGuillaume?f_ri=1010378","photo":"/images/s65_no_pic.png"}],"research_interests":[{"id":56,"name":"Materials Engineering","url":"https://www.academia.edu/Documents/in/Materials_Engineering?f_ri=1010378","nofollow":true},{"id":60,"name":"Mechanical Engineering","url":"https://www.academia.edu/Documents/in/Mechanical_Engineering?f_ri=1010378","nofollow":true},{"id":428,"name":"Algorithms","url":"https://www.academia.edu/Documents/in/Algorithms?f_ri=1010378","nofollow":true},{"id":32896,"name":"Fatigue crack growth","url":"https://www.academia.edu/Documents/in/Fatigue_crack_growth?f_ri=1010378","nofollow":true},{"id":41009,"name":"Non Destructive Testing","url":"https://www.academia.edu/Documents/in/Non_Destructive_Testing?f_ri=1010378"},{"id":61944,"name":"Crack detection","url":"https://www.academia.edu/Documents/in/Crack_detection?f_ri=1010378"},{"id":80799,"name":"Classical Physics","url":"https://www.academia.edu/Documents/in/Classical_Physics?f_ri=1010378"},{"id":118812,"name":"Ultrasonics","url":"https://www.academia.edu/Documents/in/Ultrasonics?f_ri=1010378"},{"id":440924,"name":"Surface Properties","url":"https://www.academia.edu/Documents/in/Surface_Properties?f_ri=1010378"},{"id":500811,"name":"Building Material","url":"https://www.academia.edu/Documents/in/Building_Material?f_ri=1010378"},{"id":892969,"name":"Materials Testing","url":"https://www.academia.edu/Documents/in/Materials_Testing?f_ri=1010378"},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378"},{"id":1247851,"name":"Experimental Method","url":"https://www.academia.edu/Documents/in/Experimental_Method?f_ri=1010378"},{"id":1665885,"name":"Laser Doppler Flowmetry","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Flowmetry?f_ri=1010378"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_64629220" data-work_id="64629220" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/64629220/Directionality_of_the_pressure_difference_receiver_ears_in_the_northern_leopard_frog_Rana_pipiens_pipiens">Directionality of the pressure-difference receiver ears in the northern leopard frog, Rana pipiens pipiens</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">We studied the directional response of the coupled-eardrum system in the northern leopard frog, Rana pipiens pipiens. Eardrum behavior closely approximates a linear time-invariant system, with a highly correlated input-output relationship... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_64629220" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">We studied the directional response of the coupled-eardrum system in the northern leopard frog, Rana pipiens pipiens. Eardrum behavior closely approximates a linear time-invariant system, with a highly correlated input-output relationship between the eardrum pressure difference and the eardrum velocity. Variations in the eardrum transfer function at frequencies below 800 Hz indicate the existence of an extratympanic sound transmission pathway which can interfere with eardrum motions. The eardrum velocity was shown to shift in phase as a function of sound incident angle, which was a direct result of the phaseshift of the eardrum pressure difference. We used two laser-Doppler vibrometers to measure the interaural vibration time difference (IVTD) and the interaural vibration amplitude difference (IVAD) between the motions of the two eardrums. The coupled-eardrum system enhanced the IVTD and IVAD by a factor of 3 and 3 dB, respectively, when compared to an isolatedeardrum system of the same size. Our findings are consistent with the time-delay sensitivity of other coupled-eardrum systems such as those found in crickets and flies.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/64629220" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="1d97597ea3c3d5b7f672c7fdb0b113c7" rel="nofollow" data-download="{"attachment_id":76576554,"asset_id":64629220,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/76576554/download_file?st=MTc0MDg3MDkyMCw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="36601736" href="https://independent.academia.edu/PNarins">Peter Narins</a><script data-card-contents-for-user="36601736" type="text/json">{"id":36601736,"first_name":"Peter","last_name":"Narins","domain_name":"independent","page_name":"PNarins","display_name":"Peter Narins","profile_url":"https://independent.academia.edu/PNarins?f_ri=1010378","photo":"/images/s65_no_pic.png"}</script></span></span></li><li class="js-paper-rank-work_64629220 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="64629220"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 64629220, container: ".js-paper-rank-work_64629220", }); });</script></li><li class="js-percentile-work_64629220 InlineList-item InlineList-item--bordered hidden u-tcGrayDark"><span class="percentile-widget hidden"><span class="u-mr2x percentile-widget" style="display: none">•</span><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 64629220; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-percentile-work_64629220"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></li><li class="js-view-count-work_64629220 InlineList-item InlineList-item--bordered hidden"><div><span><span class="js-view-count view-count u-mr2x" data-work-id="64629220"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 64629220; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=64629220]").text(description); $(".js-view-count-work_64629220").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_64629220").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="64629220"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">19</a>  </div><span class="InlineList-item-text u-textTruncate u-pl10x"><a class="InlineList-item-text" data-has-card-for-ri="29204" rel="nofollow" href="https://www.academia.edu/Documents/in/Comparative_Physiology">Comparative Physiology</a>, <script data-card-contents-for-ri="29204" type="text/json">{"id":29204,"name":"Comparative Physiology","url":"https://www.academia.edu/Documents/in/Comparative_Physiology?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="47884" rel="nofollow" href="https://www.academia.edu/Documents/in/Biological_Sciences">Biological Sciences</a>, <script data-card-contents-for-ri="47884" type="text/json">{"id":47884,"name":"Biological Sciences","url":"https://www.academia.edu/Documents/in/Biological_Sciences?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="59693" rel="nofollow" href="https://www.academia.edu/Documents/in/Hearing">Hearing</a>, <script data-card-contents-for-ri="59693" type="text/json">{"id":59693,"name":"Hearing","url":"https://www.academia.edu/Documents/in/Hearing?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="93037" rel="nofollow" href="https://www.academia.edu/Documents/in/Orientation">Orientation</a><script data-card-contents-for-ri="93037" type="text/json">{"id":93037,"name":"Orientation","url":"https://www.academia.edu/Documents/in/Orientation?f_ri=1010378","nofollow":true}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=64629220]'), work: {"id":64629220,"title":"Directionality of the pressure-difference receiver ears in the northern leopard frog, Rana pipiens pipiens","created_at":"2021-12-16T13:15:32.804-08:00","url":"https://www.academia.edu/64629220/Directionality_of_the_pressure_difference_receiver_ears_in_the_northern_leopard_frog_Rana_pipiens_pipiens?f_ri=1010378","dom_id":"work_64629220","summary":"We studied the directional response of the coupled-eardrum system in the northern leopard frog, Rana pipiens pipiens. Eardrum behavior closely approximates a linear time-invariant system, with a highly correlated input-output relationship between the eardrum pressure difference and the eardrum velocity. Variations in the eardrum transfer function at frequencies below 800 Hz indicate the existence of an extratympanic sound transmission pathway which can interfere with eardrum motions. The eardrum velocity was shown to shift in phase as a function of sound incident angle, which was a direct result of the phaseshift of the eardrum pressure difference. We used two laser-Doppler vibrometers to measure the interaural vibration time difference (IVTD) and the interaural vibration amplitude difference (IVAD) between the motions of the two eardrums. The coupled-eardrum system enhanced the IVTD and IVAD by a factor of 3 and 3 dB, respectively, when compared to an isolatedeardrum system of the same size. Our findings are consistent with the time-delay sensitivity of other coupled-eardrum systems such as those found in crickets and flies.","downloadable_attachments":[{"id":76576554,"asset_id":64629220,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":36601736,"first_name":"Peter","last_name":"Narins","domain_name":"independent","page_name":"PNarins","display_name":"Peter Narins","profile_url":"https://independent.academia.edu/PNarins?f_ri=1010378","photo":"/images/s65_no_pic.png"}],"research_interests":[{"id":29204,"name":"Comparative Physiology","url":"https://www.academia.edu/Documents/in/Comparative_Physiology?f_ri=1010378","nofollow":true},{"id":47884,"name":"Biological Sciences","url":"https://www.academia.edu/Documents/in/Biological_Sciences?f_ri=1010378","nofollow":true},{"id":59693,"name":"Hearing","url":"https://www.academia.edu/Documents/in/Hearing?f_ri=1010378","nofollow":true},{"id":93037,"name":"Orientation","url":"https://www.academia.edu/Documents/in/Orientation?f_ri=1010378","nofollow":true},{"id":132592,"name":"Time Delay","url":"https://www.academia.edu/Documents/in/Time_Delay?f_ri=1010378"},{"id":135029,"name":"Auditory System","url":"https://www.academia.edu/Documents/in/Auditory_System?f_ri=1010378"},{"id":181289,"name":"Interaural Time Difference","url":"https://www.academia.edu/Documents/in/Interaural_Time_Difference?f_ri=1010378"},{"id":244976,"name":"Transfer Function","url":"https://www.academia.edu/Documents/in/Transfer_Function?f_ri=1010378"},{"id":369324,"name":"Air Pressure","url":"https://www.academia.edu/Documents/in/Air_Pressure?f_ri=1010378"},{"id":413195,"name":"Time Factors","url":"https://www.academia.edu/Documents/in/Time_Factors?f_ri=1010378"},{"id":538409,"name":"Ear","url":"https://www.academia.edu/Documents/in/Ear?f_ri=1010378"},{"id":780669,"name":"Input Output","url":"https://www.academia.edu/Documents/in/Input_Output?f_ri=1010378"},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378"},{"id":1254009,"name":"Eustachian Tube","url":"https://www.academia.edu/Documents/in/Eustachian_Tube?f_ri=1010378"},{"id":1437495,"name":"Phase Shift","url":"https://www.academia.edu/Documents/in/Phase_Shift?f_ri=1010378"},{"id":1746782,"name":"Tympanic Membrane","url":"https://www.academia.edu/Documents/in/Tympanic_Membrane?f_ri=1010378"},{"id":2217019,"name":"Sound Localization","url":"https://www.academia.edu/Documents/in/Sound_Localization?f_ri=1010378"},{"id":2428413,"name":"Acoustic Stimulation","url":"https://www.academia.edu/Documents/in/Acoustic_Stimulation?f_ri=1010378"},{"id":3763225,"name":"Medical and Health Sciences","url":"https://www.academia.edu/Documents/in/Medical_and_Health_Sciences?f_ri=1010378"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_29930666" data-work_id="29930666" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/29930666/Factors_contributing_to_bone_conduction_The_middle_ear">Factors contributing to bone conduction: The middle ear</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">Measurement of the motion of the malleus umbo and stapes footplate during bone conduction ͑BC͒ stimulation was conducted in vitro in 26 temporal bones using a laser Doppler vibrometer over the frequency range 0.1 to 10 kHz. For lower... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_29930666" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">Measurement of the motion of the malleus umbo and stapes footplate during bone conduction ͑BC͒ stimulation was conducted in vitro in 26 temporal bones using a laser Doppler vibrometer over the frequency range 0.1 to 10 kHz. For lower frequencies, both ossicular sites followed the motion of the temporal bone. The differential motion between the malleus and the surrounding bone was greater than the differential motion of the stapes footplate; both resonated near 1.5 kHz. Different lesions were shown to affect the response: ͑1͒ a mass attached to the umbo lowered the resonance frequency of the ossicular vibration; ͑2͒ fixation of either the malleus or stapes increased the stiffness and shifted the resonance frequency upward; and ͑3͒ dislocation of the incudo-stapedial joint did not significantly affect the ossicular vibration. The sound radiated from the tympanic membrane was approximately 85 dB SPL at an umbo differential velocity of 1 mm/s for low frequencies in an open ear canal and about 10 dB higher for an occluded one; at higher frequencies ͑above 2 kHz͒ resonances of the canal determine the response. It was also found that the motion between the footplate and promontory was within 5 dB when the specimen was stimulated orthogonal to the vibration direction of the ossicles than in line with the same. Measurement of the differential motion of the umbo in one live human skull gave similar response as the average result from the temporal bone specimens.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/29930666" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="ee19a57d22846e2ee628699711d741ca" rel="nofollow" data-download="{"attachment_id":50389868,"asset_id":29930666,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/50389868/download_file?st=MTc0MDg3MDkyMCw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="56845161" href="https://independent.academia.edu/StefanStenfelt">Stefan Stenfelt</a><script data-card-contents-for-user="56845161" type="text/json">{"id":56845161,"first_name":"Stefan","last_name":"Stenfelt","domain_name":"independent","page_name":"StefanStenfelt","display_name":"Stefan Stenfelt","profile_url":"https://independent.academia.edu/StefanStenfelt?f_ri=1010378","photo":"/images/s65_no_pic.png"}</script></span></span></li><li class="js-paper-rank-work_29930666 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="29930666"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 29930666, container: ".js-paper-rank-work_29930666", }); 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$(".js-view-count[data-work-id=29930666]").text(description); $(".js-view-count-work_29930666").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_29930666").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="29930666"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">11</a>  </div><span class="InlineList-item-text u-textTruncate u-pl10x"><a class="InlineList-item-text" data-has-card-for-ri="23077" rel="nofollow" href="https://www.academia.edu/Documents/in/Vibration">Vibration</a>, <script data-card-contents-for-ri="23077" type="text/json">{"id":23077,"name":"Vibration","url":"https://www.academia.edu/Documents/in/Vibration?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="28235" rel="nofollow" href="https://www.academia.edu/Documents/in/Multidisciplinary">Multidisciplinary</a>, <script data-card-contents-for-ri="28235" type="text/json">{"id":28235,"name":"Multidisciplinary","url":"https://www.academia.edu/Documents/in/Multidisciplinary?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="30372" rel="nofollow" href="https://www.academia.edu/Documents/in/Low_Frequency">Low Frequency</a>, <script data-card-contents-for-ri="30372" type="text/json">{"id":30372,"name":"Low Frequency","url":"https://www.academia.edu/Documents/in/Low_Frequency?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="152679" rel="nofollow" href="https://www.academia.edu/Documents/in/Dislocations">Dislocations</a><script data-card-contents-for-ri="152679" type="text/json">{"id":152679,"name":"Dislocations","url":"https://www.academia.edu/Documents/in/Dislocations?f_ri=1010378","nofollow":true}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=29930666]'), work: {"id":29930666,"title":"Factors contributing to bone conduction: The middle ear","created_at":"2016-11-17T23:13:00.155-08:00","url":"https://www.academia.edu/29930666/Factors_contributing_to_bone_conduction_The_middle_ear?f_ri=1010378","dom_id":"work_29930666","summary":"Measurement of the motion of the malleus umbo and stapes footplate during bone conduction ͑BC͒ stimulation was conducted in vitro in 26 temporal bones using a laser Doppler vibrometer over the frequency range 0.1 to 10 kHz. For lower frequencies, both ossicular sites followed the motion of the temporal bone. The differential motion between the malleus and the surrounding bone was greater than the differential motion of the stapes footplate; both resonated near 1.5 kHz. Different lesions were shown to affect the response: ͑1͒ a mass attached to the umbo lowered the resonance frequency of the ossicular vibration; ͑2͒ fixation of either the malleus or stapes increased the stiffness and shifted the resonance frequency upward; and ͑3͒ dislocation of the incudo-stapedial joint did not significantly affect the ossicular vibration. The sound radiated from the tympanic membrane was approximately 85 dB SPL at an umbo differential velocity of 1 mm/s for low frequencies in an open ear canal and about 10 dB higher for an occluded one; at higher frequencies ͑above 2 kHz͒ resonances of the canal determine the response. It was also found that the motion between the footplate and promontory was within 5 dB when the specimen was stimulated orthogonal to the vibration direction of the ossicles than in line with the same. Measurement of the differential motion of the umbo in one live human skull gave similar response as the average result from the temporal bone specimens.","downloadable_attachments":[{"id":50389868,"asset_id":29930666,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":56845161,"first_name":"Stefan","last_name":"Stenfelt","domain_name":"independent","page_name":"StefanStenfelt","display_name":"Stefan Stenfelt","profile_url":"https://independent.academia.edu/StefanStenfelt?f_ri=1010378","photo":"/images/s65_no_pic.png"}],"research_interests":[{"id":23077,"name":"Vibration","url":"https://www.academia.edu/Documents/in/Vibration?f_ri=1010378","nofollow":true},{"id":28235,"name":"Multidisciplinary","url":"https://www.academia.edu/Documents/in/Multidisciplinary?f_ri=1010378","nofollow":true},{"id":30372,"name":"Low Frequency","url":"https://www.academia.edu/Documents/in/Low_Frequency?f_ri=1010378","nofollow":true},{"id":152679,"name":"Dislocations","url":"https://www.academia.edu/Documents/in/Dislocations?f_ri=1010378","nofollow":true},{"id":198527,"name":"Motion","url":"https://www.academia.edu/Documents/in/Motion?f_ri=1010378"},{"id":413195,"name":"Time Factors","url":"https://www.academia.edu/Documents/in/Time_Factors?f_ri=1010378"},{"id":815168,"name":"Temporal Bone","url":"https://www.academia.edu/Documents/in/Temporal_Bone?f_ri=1010378"},{"id":991233,"name":"Bone Conduction","url":"https://www.academia.edu/Documents/in/Bone_Conduction?f_ri=1010378"},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378"},{"id":1746782,"name":"Tympanic Membrane","url":"https://www.academia.edu/Documents/in/Tympanic_Membrane?f_ri=1010378"},{"id":2168952,"name":"Resonant Frequency","url":"https://www.academia.edu/Documents/in/Resonant_Frequency?f_ri=1010378"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_26935864" data-work_id="26935864" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/26935864/Active_Control_of_Plate_Like_Structures_for_Vibration_and_Sound_Suppression">Active Control of Plate-Like Structures for Vibration and Sound Suppression</a></div></div><div class="u-pb4x u-mt3x"></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/26935864" data-share-source="work_strip" 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href="https://www.academia.edu/Documents/in/Piezoelectric_Transducers">Piezoelectric Transducers</a><script data-card-contents-for-ri="165266" type="text/json">{"id":165266,"name":"Piezoelectric Transducers","url":"https://www.academia.edu/Documents/in/Piezoelectric_Transducers?f_ri=1010378","nofollow":true}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=26935864]'), work: {"id":26935864,"title":"Active Control of Plate-Like Structures for Vibration and Sound 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Control","url":"https://www.academia.edu/Documents/in/Feedback_Control?f_ri=1010378","nofollow":true},{"id":165266,"name":"Piezoelectric Transducers","url":"https://www.academia.edu/Documents/in/Piezoelectric_Transducers?f_ri=1010378","nofollow":true},{"id":395394,"name":"Active Vibration Damping","url":"https://www.academia.edu/Documents/in/Active_Vibration_Damping?f_ri=1010378"},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_10954619" data-work_id="10954619" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/10954619/Accurate_estimation_of_normal_incidence_absorption_coefficients_with_confidence_intervals_using_a_scanning_laser_Doppler_vibrometer">Accurate estimation of normal incidence absorption coefficients with confidence intervals using a scanning laser Doppler vibrometer</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">When using optical measurements of the sound fields inside a glass tube, near the material under test, to estimate the reflection and absorption coefficients, not only these acoustical parameters but also confidence intervals can be... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_10954619" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">When using optical measurements of the sound fields inside a glass tube, near the material under test, to estimate the reflection and absorption coefficients, not only these acoustical parameters but also confidence intervals can be determined. The sound fields are visualized using a scanning laser Doppler vibrometer (SLDV). In this paper the influence of different test signals on the quality of the results, obtained with this technique, is examined. The amount of data gathered during one measurement scan makes a thorough statistical analysis possible leading to the knowledge of confidence intervals. The use of a multi-sine, constructed on the resonance frequencies of the test tube, shows to be a very good alternative for the traditional periodic chirp. This signal offers the ability to obtain data for multiple frequencies in one measurement, without the danger of a low signal-to-noise ratio. The variability analysis in this paper clearly shows the advantages of the proposed multi-sine compared to the periodic chirp. The measurement procedure and the statistical analysis are validated by measuring the reflection ratio at a closed end and comparing the results with the theoretical value. Results of the testing of two building materials (an acoustic ceiling tile and linoleum) are presented and compared to supplier data.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/10954619" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="93ee760ec602b2e161e8d724cc5b5dec" rel="nofollow" data-download="{"attachment_id":47001516,"asset_id":10954619,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/47001516/download_file?st=MTc0MDg3MDkyMCw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="26544810" href="https://antwerp.academia.edu/CedricVuye">Cedric Vuye</a><script data-card-contents-for-user="26544810" type="text/json">{"id":26544810,"first_name":"Cedric","last_name":"Vuye","domain_name":"antwerp","page_name":"CedricVuye","display_name":"Cedric Vuye","profile_url":"https://antwerp.academia.edu/CedricVuye?f_ri=1010378","photo":"/images/s65_no_pic.png"}</script></span></span></li><li class="js-paper-rank-work_10954619 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="10954619"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 10954619, container: ".js-paper-rank-work_10954619", }); 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$(".js-view-count[data-work-id=10954619]").text(description); $(".js-view-count-work_10954619").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_10954619").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="10954619"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">10</a>  </div><span class="InlineList-item-text u-textTruncate u-pl10x"><a class="InlineList-item-text" data-has-card-for-ri="5187" rel="nofollow" href="https://www.academia.edu/Documents/in/Statistical_Analysis">Statistical Analysis</a>, <script data-card-contents-for-ri="5187" type="text/json">{"id":5187,"name":"Statistical Analysis","url":"https://www.academia.edu/Documents/in/Statistical_Analysis?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="7742" rel="nofollow" href="https://www.academia.edu/Documents/in/Glass">Glass</a>, <script data-card-contents-for-ri="7742" type="text/json">{"id":7742,"name":"Glass","url":"https://www.academia.edu/Documents/in/Glass?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="263152" rel="nofollow" href="https://www.academia.edu/Documents/in/Optical_physics">Optical physics</a>, <script data-card-contents-for-ri="263152" type="text/json">{"id":263152,"name":"Optical physics","url":"https://www.academia.edu/Documents/in/Optical_physics?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="500811" rel="nofollow" href="https://www.academia.edu/Documents/in/Building_Material">Building Material</a><script data-card-contents-for-ri="500811" type="text/json">{"id":500811,"name":"Building Material","url":"https://www.academia.edu/Documents/in/Building_Material?f_ri=1010378","nofollow":true}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=10954619]'), work: {"id":10954619,"title":"Accurate estimation of normal incidence absorption coefficients with confidence intervals using a scanning laser Doppler vibrometer","created_at":"2015-02-20T04:42:01.557-08:00","url":"https://www.academia.edu/10954619/Accurate_estimation_of_normal_incidence_absorption_coefficients_with_confidence_intervals_using_a_scanning_laser_Doppler_vibrometer?f_ri=1010378","dom_id":"work_10954619","summary":"When using optical measurements of the sound fields inside a glass tube, near the material under test, to estimate the reflection and absorption coefficients, not only these acoustical parameters but also confidence intervals can be determined. The sound fields are visualized using a scanning laser Doppler vibrometer (SLDV). In this paper the influence of different test signals on the quality of the results, obtained with this technique, is examined. The amount of data gathered during one measurement scan makes a thorough statistical analysis possible leading to the knowledge of confidence intervals. The use of a multi-sine, constructed on the resonance frequencies of the test tube, shows to be a very good alternative for the traditional periodic chirp. This signal offers the ability to obtain data for multiple frequencies in one measurement, without the danger of a low signal-to-noise ratio. The variability analysis in this paper clearly shows the advantages of the proposed multi-sine compared to the periodic chirp. The measurement procedure and the statistical analysis are validated by measuring the reflection ratio at a closed end and comparing the results with the theoretical value. Results of the testing of two building materials (an acoustic ceiling tile and linoleum) are presented and compared to supplier data.","downloadable_attachments":[{"id":47001516,"asset_id":10954619,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":26544810,"first_name":"Cedric","last_name":"Vuye","domain_name":"antwerp","page_name":"CedricVuye","display_name":"Cedric Vuye","profile_url":"https://antwerp.academia.edu/CedricVuye?f_ri=1010378","photo":"/images/s65_no_pic.png"}],"research_interests":[{"id":5187,"name":"Statistical Analysis","url":"https://www.academia.edu/Documents/in/Statistical_Analysis?f_ri=1010378","nofollow":true},{"id":7742,"name":"Glass","url":"https://www.academia.edu/Documents/in/Glass?f_ri=1010378","nofollow":true},{"id":263152,"name":"Optical physics","url":"https://www.academia.edu/Documents/in/Optical_physics?f_ri=1010378","nofollow":true},{"id":500811,"name":"Building Material","url":"https://www.academia.edu/Documents/in/Building_Material?f_ri=1010378","nofollow":true},{"id":991311,"name":"Signal to Noise Ratio","url":"https://www.academia.edu/Documents/in/Signal_to_Noise_Ratio?f_ri=1010378"},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378"},{"id":1410014,"name":"Optics and Lasers In Engineering","url":"https://www.academia.edu/Documents/in/Optics_and_Lasers_In_Engineering?f_ri=1010378"},{"id":1587858,"name":"Confidence Interval","url":"https://www.academia.edu/Documents/in/Confidence_Interval?f_ri=1010378"},{"id":2108071,"name":"Data Gathering","url":"https://www.academia.edu/Documents/in/Data_Gathering?f_ri=1010378"},{"id":2168952,"name":"Resonant Frequency","url":"https://www.academia.edu/Documents/in/Resonant_Frequency?f_ri=1010378"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_10954625" data-work_id="10954625" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/10954625/MEASUREMENT_OF_NORMAL_AND_OBLIQUE_INCIDENCE_ABSORPTION_COEFFICIENTS_USING_A_SCANNING_LASER_DOPPLER_VIBROMETER">MEASUREMENT OF NORMAL AND OBLIQUE INCIDENCE ABSORPTION COEFFICIENTS USING A SCANNING LASER DOPPLER VIBROMETER</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">Different well accepted standardized test methods exist to estimate absorption coefficients of acoustical materials from experiments. The most widespread technique uses the so-called Kundt's tube. This method clearly has its limitations... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_10954625" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">Different well accepted standardized test methods exist to estimate absorption coefficients of acoustical materials from experiments. The most widespread technique uses the so-called Kundt's tube. This method clearly has its limitations since both the upper and lower frequencies are limited by the diameter and length of the used tube. Another standardised method uses the comparison of the reverberation times measured in a reverberation room respectively with and without a specimen of the tested material. The needed specimens and the experimental facilities required to perform this test, are not always available. In this paper we will present a method to estimate absorption coefficients from optical measurements of the incident and reflected sound fields near the material under test. The sound fields are visualised using a scanning laser Doppler vibrometer (SLDV). Two alternative set-ups are proposed: a one-dimensional set-up where the sound field (standing waves) inside a thin glass tube is measured and a two-dimensional set-up where the propagating and reflecting sound fields between two plexiglass plates are visualized. Since the laser beam does not interfere with the acoustic wave, measurements at high frequencies (up to 20 kHz) can be performed. The measurement procedure is validated by measuring the reflection ratios at an open and closed end, and comparing them with theoretical values. Results of different test setups are presented.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/10954625" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="1904a1d36fb99fd9690ac1185510c388" rel="nofollow" data-download="{"attachment_id":47001497,"asset_id":10954625,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/47001497/download_file?st=MTc0MDg3MDkyMCw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="26544810" href="https://antwerp.academia.edu/CedricVuye">Cedric Vuye</a><script data-card-contents-for-user="26544810" type="text/json">{"id":26544810,"first_name":"Cedric","last_name":"Vuye","domain_name":"antwerp","page_name":"CedricVuye","display_name":"Cedric Vuye","profile_url":"https://antwerp.academia.edu/CedricVuye?f_ri=1010378","photo":"/images/s65_no_pic.png"}</script></span></span></li><li class="js-paper-rank-work_10954625 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="10954625"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 10954625, container: ".js-paper-rank-work_10954625", }); 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$(".js-view-count[data-work-id=10954625]").text(description); $(".js-view-count-work_10954625").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_10954625").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="10954625"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">5</a>  </div><span class="InlineList-item-text u-textTruncate u-pl9x"><a class="InlineList-item-text" data-has-card-for-ri="48458" rel="nofollow" href="https://www.academia.edu/Documents/in/High_Frequency">High Frequency</a>, <script data-card-contents-for-ri="48458" type="text/json">{"id":48458,"name":"High Frequency","url":"https://www.academia.edu/Documents/in/High_Frequency?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="145675" rel="nofollow" href="https://www.academia.edu/Documents/in/Standardisation">Standardisation</a>, <script data-card-contents-for-ri="145675" type="text/json">{"id":145675,"name":"Standardisation","url":"https://www.academia.edu/Documents/in/Standardisation?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="306975" rel="nofollow" href="https://www.academia.edu/Documents/in/Reverberation_Time">Reverberation Time</a>, <script data-card-contents-for-ri="306975" type="text/json">{"id":306975,"name":"Reverberation Time","url":"https://www.academia.edu/Documents/in/Reverberation_Time?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="1010378" rel="nofollow" href="https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer">Laser Doppler Vibrometer</a><script data-card-contents-for-ri="1010378" type="text/json">{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378","nofollow":true}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=10954625]'), work: {"id":10954625,"title":"MEASUREMENT OF NORMAL AND OBLIQUE INCIDENCE ABSORPTION COEFFICIENTS USING A SCANNING LASER DOPPLER VIBROMETER","created_at":"2015-02-20T04:42:02.882-08:00","url":"https://www.academia.edu/10954625/MEASUREMENT_OF_NORMAL_AND_OBLIQUE_INCIDENCE_ABSORPTION_COEFFICIENTS_USING_A_SCANNING_LASER_DOPPLER_VIBROMETER?f_ri=1010378","dom_id":"work_10954625","summary":"Different well accepted standardized test methods exist to estimate absorption coefficients of acoustical materials from experiments. The most widespread technique uses the so-called Kundt's tube. This method clearly has its limitations since both the upper and lower frequencies are limited by the diameter and length of the used tube. Another standardised method uses the comparison of the reverberation times measured in a reverberation room respectively with and without a specimen of the tested material. The needed specimens and the experimental facilities required to perform this test, are not always available. In this paper we will present a method to estimate absorption coefficients from optical measurements of the incident and reflected sound fields near the material under test. The sound fields are visualised using a scanning laser Doppler vibrometer (SLDV). Two alternative set-ups are proposed: a one-dimensional set-up where the sound field (standing waves) inside a thin glass tube is measured and a two-dimensional set-up where the propagating and reflecting sound fields between two plexiglass plates are visualized. Since the laser beam does not interfere with the acoustic wave, measurements at high frequencies (up to 20 kHz) can be performed. The measurement procedure is validated by measuring the reflection ratios at an open and closed end, and comparing them with theoretical values. Results of different test setups are presented.","downloadable_attachments":[{"id":47001497,"asset_id":10954625,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":26544810,"first_name":"Cedric","last_name":"Vuye","domain_name":"antwerp","page_name":"CedricVuye","display_name":"Cedric Vuye","profile_url":"https://antwerp.academia.edu/CedricVuye?f_ri=1010378","photo":"/images/s65_no_pic.png"}],"research_interests":[{"id":48458,"name":"High Frequency","url":"https://www.academia.edu/Documents/in/High_Frequency?f_ri=1010378","nofollow":true},{"id":145675,"name":"Standardisation","url":"https://www.academia.edu/Documents/in/Standardisation?f_ri=1010378","nofollow":true},{"id":306975,"name":"Reverberation Time","url":"https://www.academia.edu/Documents/in/Reverberation_Time?f_ri=1010378","nofollow":true},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378","nofollow":true},{"id":1387383,"name":"Acoustic Waves","url":"https://www.academia.edu/Documents/in/Acoustic_Waves?f_ri=1010378"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_13105518" data-work_id="13105518" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/13105518/Non_invasive_damage_detection_in_beams_using_marker_extraction_and_wavelets">Non-invasive damage detection in beams using marker extraction and wavelets</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest">Please cite this article as: Y.-Z. Song, et al., Non-invasive damage detection in beams using marker extraction and wavelets, Mech. Syst. Signal Process. (2014), http://dx.</div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/13105518" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="7278a340d42d42252a20dc2843325523" rel="nofollow" data-download="{"attachment_id":45670689,"asset_id":13105518,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/45670689/download_file?st=MTc0MDg3MDkyMCw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="32356089" href="https://bath.academia.edu/JulianPadget">Julian Padget</a><script data-card-contents-for-user="32356089" type="text/json">{"id":32356089,"first_name":"Julian","last_name":"Padget","domain_name":"bath","page_name":"JulianPadget","display_name":"Julian Padget","profile_url":"https://bath.academia.edu/JulianPadget?f_ri=1010378","photo":"/images/s65_no_pic.png"}</script></span></span></li><li class="js-paper-rank-work_13105518 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="13105518"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 13105518, container: ".js-paper-rank-work_13105518", }); 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$(".js-view-count[data-work-id=13105518]").text(description); $(".js-view-count-work_13105518").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_13105518").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="13105518"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">13</a>  </div><span class="InlineList-item-text u-textTruncate u-pl10x"><a class="InlineList-item-text" data-has-card-for-ri="60" rel="nofollow" href="https://www.academia.edu/Documents/in/Mechanical_Engineering">Mechanical Engineering</a>, <script data-card-contents-for-ri="60" type="text/json">{"id":60,"name":"Mechanical Engineering","url":"https://www.academia.edu/Documents/in/Mechanical_Engineering?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="73" rel="nofollow" href="https://www.academia.edu/Documents/in/Civil_Engineering">Civil Engineering</a>, <script data-card-contents-for-ri="73" type="text/json">{"id":73,"name":"Civil Engineering","url":"https://www.academia.edu/Documents/in/Civil_Engineering?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="854" rel="nofollow" href="https://www.academia.edu/Documents/in/Computer_Vision">Computer Vision</a>, <script data-card-contents-for-ri="854" type="text/json">{"id":854,"name":"Computer Vision","url":"https://www.academia.edu/Documents/in/Computer_Vision?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="14108" rel="nofollow" href="https://www.academia.edu/Documents/in/Damage_detection">Damage detection</a><script data-card-contents-for-ri="14108" type="text/json">{"id":14108,"name":"Damage detection","url":"https://www.academia.edu/Documents/in/Damage_detection?f_ri=1010378","nofollow":true}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=13105518]'), work: {"id":13105518,"title":"Non-invasive damage detection in beams using marker extraction and wavelets","created_at":"2015-06-19T09:21:25.655-07:00","url":"https://www.academia.edu/13105518/Non_invasive_damage_detection_in_beams_using_marker_extraction_and_wavelets?f_ri=1010378","dom_id":"work_13105518","summary":"Please cite this article as: Y.-Z. Song, et al., Non-invasive damage detection in beams using marker extraction and wavelets, Mech. Syst. Signal Process. (2014), http://dx.","downloadable_attachments":[{"id":45670689,"asset_id":13105518,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":32356089,"first_name":"Julian","last_name":"Padget","domain_name":"bath","page_name":"JulianPadget","display_name":"Julian Padget","profile_url":"https://bath.academia.edu/JulianPadget?f_ri=1010378","photo":"/images/s65_no_pic.png"}],"research_interests":[{"id":60,"name":"Mechanical Engineering","url":"https://www.academia.edu/Documents/in/Mechanical_Engineering?f_ri=1010378","nofollow":true},{"id":73,"name":"Civil Engineering","url":"https://www.academia.edu/Documents/in/Civil_Engineering?f_ri=1010378","nofollow":true},{"id":854,"name":"Computer Vision","url":"https://www.academia.edu/Documents/in/Computer_Vision?f_ri=1010378","nofollow":true},{"id":14108,"name":"Damage detection","url":"https://www.academia.edu/Documents/in/Damage_detection?f_ri=1010378","nofollow":true},{"id":91262,"name":"Wavelet Transform","url":"https://www.academia.edu/Documents/in/Wavelet_Transform?f_ri=1010378"},{"id":288450,"name":"Composite Structure","url":"https://www.academia.edu/Documents/in/Composite_Structure?f_ri=1010378"},{"id":386557,"name":"Finite Element Model","url":"https://www.academia.edu/Documents/in/Finite_Element_Model?f_ri=1010378"},{"id":464325,"name":"Hough Transform","url":"https://www.academia.edu/Documents/in/Hough_Transform?f_ri=1010378"},{"id":508324,"name":"Impact damage","url":"https://www.academia.edu/Documents/in/Impact_damage?f_ri=1010378"},{"id":554780,"name":"Interdisciplinary Engineering","url":"https://www.academia.edu/Documents/in/Interdisciplinary_Engineering?f_ri=1010378"},{"id":890611,"name":"Fractal Dimension","url":"https://www.academia.edu/Documents/in/Fractal_Dimension?f_ri=1010378"},{"id":910840,"name":"Non Destructive Evaluation","url":"https://www.academia.edu/Documents/in/Non_Destructive_Evaluation?f_ri=1010378"},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_25317900" data-work_id="25317900" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/25317900/Guided_wave_expansion_in_warped_curvelet_frames">Guided wave expansion in warped curvelet frames</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">Lamb wave testing for structural health monitoring (SHM) often relies on analysis of wavefields recorded through scanning laser Doppler vibrometers (SLDVs) or ultrasonic scanners. Damage detection and characterization with these... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_25317900" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">Lamb wave testing for structural health monitoring (SHM) often relies on analysis of wavefields recorded through scanning laser Doppler vibrometers (SLDVs) or ultrasonic scanners. Damage detection and characterization with these techniques requires isolation of defect-induced reflections in the wavefield from the injected wave packet and from scattering events associated with structural features such as boundaries, rivets, joints, etc. This is a challenging task when dealing with complex structures and multimodal, dispersive propagation regimes, whereby various wave contributions in both the time/space and the frequency/wavenumber domain overlap.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/25317900" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="cecfb18a991dfbcd066cdb626e1b6a38" rel="nofollow" data-download="{"attachment_id":45691879,"asset_id":25317900,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/45691879/download_file?st=MTc0MDg3MDkyMCw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="25872369" href="https://independent.academia.edu/guidomasetti">guido masetti</a><script data-card-contents-for-user="25872369" type="text/json">{"id":25872369,"first_name":"guido","last_name":"masetti","domain_name":"independent","page_name":"guidomasetti","display_name":"guido masetti","profile_url":"https://independent.academia.edu/guidomasetti?f_ri=1010378","photo":"/images/s65_no_pic.png"}</script></span></span></li><li class="js-paper-rank-work_25317900 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="25317900"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 25317900, container: ".js-paper-rank-work_25317900", }); 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$(".js-view-count[data-work-id=25317900]").text(description); $(".js-view-count-work_25317900").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_25317900").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="25317900"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">17</a>  </div><span class="InlineList-item-text u-textTruncate u-pl10x"><a class="InlineList-item-text" data-has-card-for-ri="48" rel="nofollow" href="https://www.academia.edu/Documents/in/Engineering">Engineering</a>, <script data-card-contents-for-ri="48" type="text/json">{"id":48,"name":"Engineering","url":"https://www.academia.edu/Documents/in/Engineering?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="499" rel="nofollow" href="https://www.academia.edu/Documents/in/Acoustics">Acoustics</a>, <script data-card-contents-for-ri="499" type="text/json">{"id":499,"name":"Acoustics","url":"https://www.academia.edu/Documents/in/Acoustics?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="1336" rel="nofollow" href="https://www.academia.edu/Documents/in/Structural_Engineering">Structural Engineering</a>, <script data-card-contents-for-ri="1336" type="text/json">{"id":1336,"name":"Structural Engineering","url":"https://www.academia.edu/Documents/in/Structural_Engineering?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="11402" rel="nofollow" href="https://www.academia.edu/Documents/in/Surface_Acoustic_Waves">Surface Acoustic Waves</a><script data-card-contents-for-ri="11402" type="text/json">{"id":11402,"name":"Surface Acoustic Waves","url":"https://www.academia.edu/Documents/in/Surface_Acoustic_Waves?f_ri=1010378","nofollow":true}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=25317900]'), work: {"id":25317900,"title":"Guided wave expansion in warped curvelet frames","created_at":"2016-05-14T02:56:07.399-07:00","url":"https://www.academia.edu/25317900/Guided_wave_expansion_in_warped_curvelet_frames?f_ri=1010378","dom_id":"work_25317900","summary":"Lamb wave testing for structural health monitoring (SHM) often relies on analysis of wavefields recorded through scanning laser Doppler vibrometers (SLDVs) or ultrasonic scanners. Damage detection and characterization with these techniques requires isolation of defect-induced reflections in the wavefield from the injected wave packet and from scattering events associated with structural features such as boundaries, rivets, joints, etc. This is a challenging task when dealing with complex structures and multimodal, dispersive propagation regimes, whereby various wave contributions in both the time/space and the frequency/wavenumber domain overlap.","downloadable_attachments":[{"id":45691879,"asset_id":25317900,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":25872369,"first_name":"guido","last_name":"masetti","domain_name":"independent","page_name":"guidomasetti","display_name":"guido masetti","profile_url":"https://independent.academia.edu/guidomasetti?f_ri=1010378","photo":"/images/s65_no_pic.png"}],"research_interests":[{"id":48,"name":"Engineering","url":"https://www.academia.edu/Documents/in/Engineering?f_ri=1010378","nofollow":true},{"id":499,"name":"Acoustics","url":"https://www.academia.edu/Documents/in/Acoustics?f_ri=1010378","nofollow":true},{"id":1336,"name":"Structural Engineering","url":"https://www.academia.edu/Documents/in/Structural_Engineering?f_ri=1010378","nofollow":true},{"id":11402,"name":"Surface Acoustic Waves","url":"https://www.academia.edu/Documents/in/Surface_Acoustic_Waves?f_ri=1010378","nofollow":true},{"id":14081,"name":"Structural Health Monitoring","url":"https://www.academia.edu/Documents/in/Structural_Health_Monitoring?f_ri=1010378"},{"id":14108,"name":"Damage detection","url":"https://www.academia.edu/Documents/in/Damage_detection?f_ri=1010378"},{"id":57608,"name":"Dispersion","url":"https://www.academia.edu/Documents/in/Dispersion?f_ri=1010378"},{"id":58405,"name":"Lamb wave","url":"https://www.academia.edu/Documents/in/Lamb_wave?f_ri=1010378"},{"id":91262,"name":"Wavelet Transform","url":"https://www.academia.edu/Documents/in/Wavelet_Transform?f_ri=1010378"},{"id":91365,"name":"Wavelet Transforms","url":"https://www.academia.edu/Documents/in/Wavelet_Transforms?f_ri=1010378"},{"id":118582,"name":"Physical sciences","url":"https://www.academia.edu/Documents/in/Physical_sciences?f_ri=1010378"},{"id":205509,"name":"Time Frequency Analysis","url":"https://www.academia.edu/Documents/in/Time_Frequency_Analysis?f_ri=1010378"},{"id":260010,"name":"Wave propagation","url":"https://www.academia.edu/Documents/in/Wave_propagation?f_ri=1010378"},{"id":314318,"name":"Sparse representation","url":"https://www.academia.edu/Documents/in/Sparse_representation?f_ri=1010378"},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378"},{"id":1010854,"name":"Complex Structure","url":"https://www.academia.edu/Documents/in/Complex_Structure?f_ri=1010378"},{"id":1300470,"name":"Guided Wave","url":"https://www.academia.edu/Documents/in/Guided_Wave?f_ri=1010378"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_24889638" data-work_id="24889638" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/24889638/Measurement_of_ripening_speed_and_determination_of_the_optimum_ripeness_of_melons_by_a_nondestructive_acoustic_vibration_method">Measurement of ripening speed and determination of the optimum ripeness of melons by a nondestructive acoustic vibration method</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">The ripening speed of the melon cultivar 'Miyabi-Haruaki' was determined by monitoring its elasticity index (EI) with a nondestructive acoustic vibration method. EI was determined by the formula EI = f 2 2 · m 2/3 , where f 2 is the... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_24889638" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">The ripening speed of the melon cultivar 'Miyabi-Haruaki' was determined by monitoring its elasticity index (EI) with a nondestructive acoustic vibration method. EI was determined by the formula EI = f 2 2 · m 2/3 , where f 2 is the second resonance frequency of a melon sample, and m is the mass of the sample. The speed of ripening, i.e., EI/day, was determined to be 0.36 × 10 4 kg 2/3 Hz 2 d −1 , which was lower than the ripening speeds of previously studied melon cultivars 'Andes' and 'Quincy' (0.39 × 10 4 kg 2/3 Hz 2 d −1 and 0.50 × 10 4 kg 2/3 Hz 2 d −1 , respectively). Using a sensory panel test, the period of optimum ripeness of the melons was determined to be 5.3-7.1 × 10 4 kg 2/3 Hz 2 . Nondestructive determination of the period of optimum ripeness in terms of the EI can be useful for estimating the shelf-life of melons. In addition, by determining the ripening speed, the time required for a melon to reach optimum ripeness can be predicted.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/24889638" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="eb27c8c4f4c7756258be9d50e3ae03fe" rel="nofollow" data-download="{"attachment_id":45209595,"asset_id":24889638,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/45209595/download_file?st=MTc0MDg3MDkyMCw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="47979476" href="https://independent.academia.edu/NaokiSakurai">Naoki Sakurai</a><script data-card-contents-for-user="47979476" type="text/json">{"id":47979476,"first_name":"Naoki","last_name":"Sakurai","domain_name":"independent","page_name":"NaokiSakurai","display_name":"Naoki Sakurai","profile_url":"https://independent.academia.edu/NaokiSakurai?f_ri=1010378","photo":"/images/s65_no_pic.png"}</script></span></span></li><li class="js-paper-rank-work_24889638 InlineList-item InlineList-item--bordered hidden"><span class="js-paper-rank-view hidden u-tcGrayDark" data-paper-rank-work-id="24889638"><i class="u-m1x fa fa-bar-chart"></i><strong class="js-paper-rank"></strong></span><script>$(function() { new Works.PaperRankView({ workId: 24889638, container: ".js-paper-rank-work_24889638", }); });</script></li><li class="js-percentile-work_24889638 InlineList-item InlineList-item--bordered hidden u-tcGrayDark"><span class="percentile-widget hidden"><span class="u-mr2x percentile-widget" style="display: none">•</span><span class="u-mr2x work-percentile"></span></span><script>$(function () { var workId = 24889638; window.Academia.workPercentilesFetcher.queue(workId, function (percentileText) { var container = $(".js-percentile-work_24889638"); container.find('.work-percentile').text(percentileText.charAt(0).toUpperCase() + percentileText.slice(1)); container.find('.percentile-widget').show(); container.find('.percentile-widget').removeClass('hidden'); }); });</script></li><li class="js-view-count-work_24889638 InlineList-item InlineList-item--bordered hidden"><div><span><span class="js-view-count view-count u-mr2x" data-work-id="24889638"><i class="fa fa-spinner fa-spin"></i></span><script>$(function () { var workId = 24889638; window.Academia.workViewCountsFetcher.queue(workId, function (count) { var description = window.$h.commaizeInt(count) + " " + window.$h.pluralize(count, 'View'); $(".js-view-count[data-work-id=24889638]").text(description); $(".js-view-count-work_24889638").attr('title', description).tooltip(); }); });</script></span><script>$(function() { $(".js-view-count-work_24889638").removeClass('hidden') })</script></div></li><li class="InlineList-item u-positionRelative" style="max-width: 250px"><div class="u-positionAbsolute" data-has-card-for-ri-list="24889638"><i class="fa fa-tag InlineList-item-icon u-positionRelative"></i>  <a class="InlineList-item-text u-positionRelative">11</a>  </div><span class="InlineList-item-text u-textTruncate u-pl10x"><a class="InlineList-item-text" data-has-card-for-ri="23077" rel="nofollow" href="https://www.academia.edu/Documents/in/Vibration">Vibration</a>, <script data-card-contents-for-ri="23077" type="text/json">{"id":23077,"name":"Vibration","url":"https://www.academia.edu/Documents/in/Vibration?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="39718" rel="nofollow" href="https://www.academia.edu/Documents/in/Food_Preservation">Food Preservation</a>, <script data-card-contents-for-ri="39718" type="text/json">{"id":39718,"name":"Food Preservation","url":"https://www.academia.edu/Documents/in/Food_Preservation?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="66912" rel="nofollow" href="https://www.academia.edu/Documents/in/SHELF_LIFE">SHELF LIFE</a>, <script data-card-contents-for-ri="66912" type="text/json">{"id":66912,"name":"SHELF LIFE","url":"https://www.academia.edu/Documents/in/SHELF_LIFE?f_ri=1010378","nofollow":true}</script><a class="InlineList-item-text" data-has-card-for-ri="96446" rel="nofollow" href="https://www.academia.edu/Documents/in/Measurement">Measurement</a><script data-card-contents-for-ri="96446" type="text/json">{"id":96446,"name":"Measurement","url":"https://www.academia.edu/Documents/in/Measurement?f_ri=1010378","nofollow":true}</script></span></li><script>(function(){ if (true) { new Aedu.ResearchInterestListCard({ el: $('*[data-has-card-for-ri-list=24889638]'), work: {"id":24889638,"title":"Measurement of ripening speed and determination of the optimum ripeness of melons by a nondestructive acoustic vibration method","created_at":"2016-04-29T15:00:03.047-07:00","url":"https://www.academia.edu/24889638/Measurement_of_ripening_speed_and_determination_of_the_optimum_ripeness_of_melons_by_a_nondestructive_acoustic_vibration_method?f_ri=1010378","dom_id":"work_24889638","summary":"The ripening speed of the melon cultivar 'Miyabi-Haruaki' was determined by monitoring its elasticity index (EI) with a nondestructive acoustic vibration method. EI was determined by the formula EI = f 2 2 · m 2/3 , where f 2 is the second resonance frequency of a melon sample, and m is the mass of the sample. The speed of ripening, i.e., EI/day, was determined to be 0.36 × 10 4 kg 2/3 Hz 2 d −1 , which was lower than the ripening speeds of previously studied melon cultivars 'Andes' and 'Quincy' (0.39 × 10 4 kg 2/3 Hz 2 d −1 and 0.50 × 10 4 kg 2/3 Hz 2 d −1 , respectively). Using a sensory panel test, the period of optimum ripeness of the melons was determined to be 5.3-7.1 × 10 4 kg 2/3 Hz 2 . Nondestructive determination of the period of optimum ripeness in terms of the EI can be useful for estimating the shelf-life of melons. In addition, by determining the ripening speed, the time required for a melon to reach optimum ripeness can be predicted.","downloadable_attachments":[{"id":45209595,"asset_id":24889638,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":47979476,"first_name":"Naoki","last_name":"Sakurai","domain_name":"independent","page_name":"NaokiSakurai","display_name":"Naoki Sakurai","profile_url":"https://independent.academia.edu/NaokiSakurai?f_ri=1010378","photo":"/images/s65_no_pic.png"}],"research_interests":[{"id":23077,"name":"Vibration","url":"https://www.academia.edu/Documents/in/Vibration?f_ri=1010378","nofollow":true},{"id":39718,"name":"Food Preservation","url":"https://www.academia.edu/Documents/in/Food_Preservation?f_ri=1010378","nofollow":true},{"id":66912,"name":"SHELF LIFE","url":"https://www.academia.edu/Documents/in/SHELF_LIFE?f_ri=1010378","nofollow":true},{"id":96446,"name":"Measurement","url":"https://www.academia.edu/Documents/in/Measurement?f_ri=1010378","nofollow":true},{"id":225187,"name":"Postharvest Biology and Technology","url":"https://www.academia.edu/Documents/in/Postharvest_Biology_and_Technology?f_ri=1010378"},{"id":528615,"name":"Postharvest","url":"https://www.academia.edu/Documents/in/Postharvest?f_ri=1010378"},{"id":581211,"name":"Maturity","url":"https://www.academia.edu/Documents/in/Maturity?f_ri=1010378"},{"id":749302,"name":"Indexation","url":"https://www.academia.edu/Documents/in/Indexation?f_ri=1010378"},{"id":1000014,"name":"Ripening","url":"https://www.academia.edu/Documents/in/Ripening?f_ri=1010378"},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378"},{"id":2168952,"name":"Resonant Frequency","url":"https://www.academia.edu/Documents/in/Resonant_Frequency?f_ri=1010378"}]}, }) } })();</script></ul></li></ul></div></div><div class="u-borderBottom1 u-borderColorGrayLighter"><div class="clearfix u-pv7x u-mb0x js-work-card work_24532026 coauthored" data-work_id="24532026" itemscope="itemscope" itemtype="https://schema.org/ScholarlyArticle"><div class="header"><div class="title u-fontSerif u-fs22 u-lineHeight1_3"><a class="u-tcGrayDarkest js-work-link" href="https://www.academia.edu/24532026/Three_Dimensional_Motion_of_the_Organ_of_Corti">Three-Dimensional Motion of the Organ of Corti</a></div></div><div class="u-pb4x u-mt3x"><div class="summary u-fs14 u-fw300 u-lineHeight1_5 u-tcGrayDarkest"><div class="summarized">The vibration of the organ of Corti, a three-dimensional micromechanical structure that incorporates the sensory cells of the hearing organ, was measured in three mutually orthogonal directions. This was achieved by coupling the light of... <a class="more_link u-tcGrayDark u-linkUnstyled" data-container=".work_24532026" data-show=".complete" data-hide=".summarized" data-more-link-behavior="true" href="#">more</a></div><div class="complete hidden">The vibration of the organ of Corti, a three-dimensional micromechanical structure that incorporates the sensory cells of the hearing organ, was measured in three mutually orthogonal directions. This was achieved by coupling the light of a laser Doppler vibrometer into the side arm of an epifluorescence microscope to measure velocity along the optical axis of the microscope, called the transversal direction. Displacements were measured in the plane orthogonal to the transverse direction with a differential photodiode mounted on the microscope in the focal plane. Vibration responses were measured in the fourth turn of a temporal-bone preparation of the guinea-pig cochlea. Responses were corrected for a "fast" wave component caused by the presence of the hole in the cochlear wall, made to view the structures. The frequency responses of the basilar membrane and the reticular lamina were similar, with little phase differences between the vibration components. Their motion was rectilinear and vertical to the surface of their membranes. The organ of Corti rotated about a point near the edge of the inner limbus. A second vibration mode was detected in the motion of the tectorial membrane. This vibration mode was directed parallel to the reticular lamina and became apparent for frequencies above ϳ0.5 oct below the characteristic frequency. This radial vibration mode presumably controls the shearing action of the hair bundles of the outer hair cells.</div></div></div><ul class="InlineList u-ph0x u-fs13"><li class="InlineList-item logged_in_only"><div class="share_on_academia_work_button"><a class="academia_share Button Button--inverseBlue Button--sm js-bookmark-button" data-academia-share="Work/24532026" data-share-source="work_strip" data-spinner="small_white_hide_contents"><i class="fa fa-plus"></i><span class="work-strip-link-text u-ml1x" data-content="button_text">Bookmark</span></a></div></li><li class="InlineList-item"><div class="download"><a id="9820153ea0b2d5347111e1c36ac2f423" rel="nofollow" data-download="{"attachment_id":44862530,"asset_id":24532026,"asset_type":"Work","always_allow_download":false,"track":null,"button_location":"work_strip","source":null,"hide_modal":null}" class="Button Button--sm Button--inverseGreen js-download-button prompt_button doc_download" href="https://www.academia.edu/attachments/44862530/download_file?st=MTc0MDg3MDkyMCw4LjIyMi4yMDguMTQ2&s=work_strip"><i class="fa fa-arrow-circle-o-down fa-lg"></i><span class="u-textUppercase u-ml1x" data-content="button_text">Download</span></a></div></li><li class="InlineList-item"><ul class="InlineList InlineList--bordered u-ph0x"><li class="InlineList-item InlineList-item--bordered"><span class="InlineList-item-text">by <span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a class="u-tcGrayDark u-fw700" data-has-card-for-user="47283245" href="https://independent.academia.edu/WernerHemmert">Werner Hemmert</a><script data-card-contents-for-user="47283245" type="text/json">{"id":47283245,"first_name":"Werner","last_name":"Hemmert","domain_name":"independent","page_name":"WernerHemmert","display_name":"Werner Hemmert","profile_url":"https://independent.academia.edu/WernerHemmert?f_ri=1010378","photo":"/images/s65_no_pic.png"}</script></span></span><span class="u-displayInlineBlock InlineList-item-text"> and <span class="u-textDecorationUnderline u-clickable InlineList-item-text js-work-more-authors-24532026">+1</span><div class="hidden js-additional-users-24532026"><div><span itemscope="itemscope" itemprop="author" itemtype="https://schema.org/Person"><a href="https://independent.academia.edu/AnthonyGummer">Anthony Gummer</a></span></div></div></span><script>(function(){ var popoverSettings = { el: $('.js-work-more-authors-24532026'), placement: 'bottom', hide_delay: 200, html: true, content: function(){ return $('.js-additional-users-24532026').html(); 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This was achieved by coupling the light of a laser Doppler vibrometer into the side arm of an epifluorescence microscope to measure velocity along the optical axis of the microscope, called the transversal direction. Displacements were measured in the plane orthogonal to the transverse direction with a differential photodiode mounted on the microscope in the focal plane. Vibration responses were measured in the fourth turn of a temporal-bone preparation of the guinea-pig cochlea. Responses were corrected for a \"fast\" wave component caused by the presence of the hole in the cochlear wall, made to view the structures. The frequency responses of the basilar membrane and the reticular lamina were similar, with little phase differences between the vibration components. Their motion was rectilinear and vertical to the surface of their membranes. The organ of Corti rotated about a point near the edge of the inner limbus. A second vibration mode was detected in the motion of the tectorial membrane. This vibration mode was directed parallel to the reticular lamina and became apparent for frequencies above ϳ0.5 oct below the characteristic frequency. This radial vibration mode presumably controls the shearing action of the hair bundles of the outer hair cells.","downloadable_attachments":[{"id":44862530,"asset_id":24532026,"asset_type":"Work","always_allow_download":false}],"ordered_authors":[{"id":47283245,"first_name":"Werner","last_name":"Hemmert","domain_name":"independent","page_name":"WernerHemmert","display_name":"Werner Hemmert","profile_url":"https://independent.academia.edu/WernerHemmert?f_ri=1010378","photo":"/images/s65_no_pic.png"},{"id":47325198,"first_name":"Anthony","last_name":"Gummer","domain_name":"independent","page_name":"AnthonyGummer","display_name":"Anthony Gummer","profile_url":"https://independent.academia.edu/AnthonyGummer?f_ri=1010378","photo":"/images/s65_no_pic.png"}],"research_interests":[{"id":502,"name":"Biophysics","url":"https://www.academia.edu/Documents/in/Biophysics?f_ri=1010378","nofollow":true},{"id":19156,"name":"Biophysical Chemistry","url":"https://www.academia.edu/Documents/in/Biophysical_Chemistry?f_ri=1010378","nofollow":true},{"id":23077,"name":"Vibration","url":"https://www.academia.edu/Documents/in/Vibration?f_ri=1010378","nofollow":true},{"id":47884,"name":"Biological Sciences","url":"https://www.academia.edu/Documents/in/Biological_Sciences?f_ri=1010378","nofollow":true},{"id":84745,"name":"Movement","url":"https://www.academia.edu/Documents/in/Movement?f_ri=1010378"},{"id":118582,"name":"Physical sciences","url":"https://www.academia.edu/Documents/in/Physical_sciences?f_ri=1010378"},{"id":260118,"name":"CHEMICAL SCIENCES","url":"https://www.academia.edu/Documents/in/CHEMICAL_SCIENCES?f_ri=1010378"},{"id":485556,"name":"Guinea Pig","url":"https://www.academia.edu/Documents/in/Guinea_Pig?f_ri=1010378"},{"id":504035,"name":"Three Dimensional","url":"https://www.academia.edu/Documents/in/Three_Dimensional?f_ri=1010378"},{"id":744772,"name":"organ of Corti","url":"https://www.academia.edu/Documents/in/organ_of_Corti?f_ri=1010378"},{"id":794074,"name":"Microspheres","url":"https://www.academia.edu/Documents/in/Microspheres?f_ri=1010378"},{"id":815168,"name":"Temporal Bone","url":"https://www.academia.edu/Documents/in/Temporal_Bone?f_ri=1010378"},{"id":1010378,"name":"Laser Doppler Vibrometer","url":"https://www.academia.edu/Documents/in/Laser_Doppler_Vibrometer?f_ri=1010378"},{"id":1146437,"name":"Frequency Response","url":"https://www.academia.edu/Documents/in/Frequency_Response?f_ri=1010378"},{"id":1516215,"name":"Tectorial Membrane","url":"https://www.academia.edu/Documents/in/Tectorial_Membrane?f_ri=1010378"}]}, }) } })();</script></ul></li></ul></div></div></div><div class="u-taCenter Pagination"><ul class="pagination"><li class="next_page"><a href="/Documents/in/Laser_Doppler_Vibrometer?after=50%2C24532026" rel="next">Next</a></li><li class="last next"><a href="/Documents/in/Laser_Doppler_Vibrometer?page=last">Last 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