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attenuation measurement</title> <meta name="description" content="Search results for: fiber attenuation measurement"> <meta name="keywords" content="fiber attenuation measurement"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> 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action="https://publications.waset.org/abstracts/search"> <div id="custom-search-input"> <div class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="fiber attenuation measurement"> <input type="submit" class="btn_search" value="Search"> </div> </div> </form> </div> </div> <div class="row mt-3"> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Commenced</strong> in January 2007</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Frequency:</strong> Monthly</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Edition:</strong> International</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Paper Count:</strong> 4061</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: fiber attenuation measurement</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4061</span> Attenuation Scale Calibration of an Optical Time Domain Reflectometer</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Osama%20Terra">Osama Terra</a>, <a href="https://publications.waset.org/abstracts/search?q=Hatem%20Hussein"> Hatem Hussein</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Calibration of Optical Time Domain Reflectometer (OTDR) is crucial for the accurate determination of loss budget for long optical fiber links. In this paper, the calibration of the attenuation scale of an OTDR using two different techniques is discussed and implemented. The first technique is the external modulation method (EM). A setup is proposed to calibrate an OTDR over a dynamic range of around 15 dB based on the EM method. Afterwards, the OTDR is calibrated using two standard reference fibers (SRF). Both SRF are calibrated using cut-back technique; one of them is calibrated at our home institute (the National Institute of Standards – NIS) while the other at the National Physical Laboratory (NPL) of the United Kingdom to confirm our results. In addition, the parameters contributing the calibration uncertainty are thoroughly investigated. Although the EM method has several advantages over the SRF method, the uncertainties in the SRF method is found to surpass that of the EM method. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=optical%20time%20domain%20reflectometer" title="optical time domain reflectometer">optical time domain reflectometer</a>, <a href="https://publications.waset.org/abstracts/search?q=fiber%20attenuation%20measurement" title=" fiber attenuation measurement"> fiber attenuation measurement</a>, <a href="https://publications.waset.org/abstracts/search?q=OTDR%20calibration" title=" OTDR calibration"> OTDR calibration</a>, <a href="https://publications.waset.org/abstracts/search?q=external%20source%20method" title=" external source method"> external source method</a> </p> <a href="https://publications.waset.org/abstracts/56989/attenuation-scale-calibration-of-an-optical-time-domain-reflectometer" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/56989.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">465</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4060</span> Study on Intensity Modulated Non-Contact Optical Fiber Vibration Sensors of Different Configurations</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Dinkar%20Dantala">Dinkar Dantala</a>, <a href="https://publications.waset.org/abstracts/search?q=Kishore%20Putha"> Kishore Putha</a>, <a href="https://publications.waset.org/abstracts/search?q=Padmavathi%20Manchineelu"> Padmavathi Manchineelu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Optical fibers are widely used in the measurement of several physical parameters like temperature, pressure, vibrations etc. Measurement of vibrations plays a vital role in machines. In this paper, three fiber optic non-contact vibration sensors were discussed, which are designed based on the principle of light intensity modulation. The Dual plastic optical fiber, Fiber optic fused 1x2 coupler and Fiber optic fused 2x2 coupler vibration sensors are compared based on range of frequency, resolution and sensitivity. It is to conclude that 2x2 coupler configuration shows better response than other two sensors. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fiber%20optic" title="fiber optic">fiber optic</a>, <a href="https://publications.waset.org/abstracts/search?q=PMMA" title=" PMMA"> PMMA</a>, <a href="https://publications.waset.org/abstracts/search?q=vibration%20sensor" title=" vibration sensor"> vibration sensor</a>, <a href="https://publications.waset.org/abstracts/search?q=intensity-modulated" title=" intensity-modulated"> intensity-modulated</a> </p> <a href="https://publications.waset.org/abstracts/66225/study-on-intensity-modulated-non-contact-optical-fiber-vibration-sensors-of-different-configurations" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/66225.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">370</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4059</span> Validation of the Formula for Air Attenuation Coefficient for Acoustic Scale Models</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Katarzyna%20Baruch">Katarzyna Baruch</a>, <a href="https://publications.waset.org/abstracts/search?q=Agata%20Szelag"> Agata Szelag</a>, <a href="https://publications.waset.org/abstracts/search?q=Aleksandra%20Majchrzak"> Aleksandra Majchrzak</a>, <a href="https://publications.waset.org/abstracts/search?q=Tadeusz%20Kamisinski"> Tadeusz Kamisinski</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Methodology of measurement of sound absorption coefficient in scaled models is based on the ISO 354 standard. The measurement is realised indirectly - the coefficient is calculated from the reverberation time of an empty chamber as well as a chamber with an inserted sample. It is crucial to maintain the atmospheric conditions stable during both measurements. Possible differences may be amended basing on the formulas for atmospheric attenuation coefficient α given in ISO 9613-1. Model studies require scaling particular factors in compliance with specified characteristic numbers. For absorption coefficient measurement, these are for example: frequency range or the value of attenuation coefficient m. Thanks to the possibilities of modern electroacoustic transducers, it is no longer a problem to scale the frequencies which have to be proportionally higher. However, it may be problematic to reduce values of the attenuation coefficient. It is practically obtained by drying the air down to a defined relative humidity. Despite the change of frequency range and relative humidity of the air, ISO 9613-1 standard still allows the calculation of the amendment for little differences of the atmospheric conditions in the chamber during measurements. The paper discusses a number of theoretical analyses and experimental measurements performed in order to obtain consistency between the values of attenuation coefficient calculated from the formulas given in the standard and by measurement. The authors performed measurements of reverberation time in a chamber made in a 1/8 scale in a corresponding frequency range, i.e. 800 Hz - 40 kHz and in different values of the relative air humidity (40% 5%). Based on the measurements, empirical values of attenuation coefficient were calculated and compared with theoretical ones. In general, the values correspond with each other, but for high frequencies and low values of relative air humidity the differences are significant. Those discrepancies may directly influence the values of measured sound absorption coefficient and cause errors. Therefore, the authors made an effort to determine an amendment minimizing described inaccuracy. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=air%20absorption%20correction" title="air absorption correction">air absorption correction</a>, <a href="https://publications.waset.org/abstracts/search?q=attenuation%20coefficient" title=" attenuation coefficient"> attenuation coefficient</a>, <a href="https://publications.waset.org/abstracts/search?q=dimensional%20analysis" title=" dimensional analysis"> dimensional analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=model%20study" title=" model study"> model study</a>, <a href="https://publications.waset.org/abstracts/search?q=scaled%20modelling" title=" scaled modelling"> scaled modelling</a> </p> <a href="https://publications.waset.org/abstracts/78693/validation-of-the-formula-for-air-attenuation-coefficient-for-acoustic-scale-models" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/78693.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">421</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4058</span> The Affect of Water Quality on the Ultrasonic Attenuation of Bone Mimic</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20Elsariti">A. Elsariti</a>, <a href="https://publications.waset.org/abstracts/search?q=T.%20Evans"> T. Evans</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The propagation mechanisms in the trabecular bone are poorly understood and have been the subject of extended debate; also, steel wool has been evaluated as a potential bone mimic, Its advantages are ready availability, low cost and a wide range of sizes. In this study, both distilled and tap water were used to estimate the ultrasonic attenuation in coarse steel wool. It is clear from the results that the attenuation of coarse steel wool increased as the distance between the transducers decreased, and it is higher in tap water than distilled water. At 9cm distance between the transducers the attenuation was approximately 0.97 and 4.7 dB in distilled and tap water respectively. While it is 6.97 and 12.2 dB in distilled and tap water respectively at distance 4cm. This change in the attenuation between both distilled and tap water is probably due to gas bubbles in the tap water. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=bone%20mimic" title="bone mimic">bone mimic</a>, <a href="https://publications.waset.org/abstracts/search?q=porosity" title=" porosity"> porosity</a>, <a href="https://publications.waset.org/abstracts/search?q=tap%20water" title=" tap water"> tap water</a>, <a href="https://publications.waset.org/abstracts/search?q=distilled%20water" title=" distilled water"> distilled water</a>, <a href="https://publications.waset.org/abstracts/search?q=ultrasonic%20attenuation" title=" ultrasonic attenuation"> ultrasonic attenuation</a> </p> <a href="https://publications.waset.org/abstracts/21847/the-affect-of-water-quality-on-the-ultrasonic-attenuation-of-bone-mimic" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/21847.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">528</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4057</span> Simulation of Gamma Rays Attenuation Coefficient for Some common Shielding Materials Using Monte Carlo Program</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Cherief%20Houria">Cherief Houria</a>, <a href="https://publications.waset.org/abstracts/search?q=Fouka%20Mourad"> Fouka Mourad</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this work, the simulation of the radiation attenuation is carried out in a photon detector consisting of different common shielding material using a Monte Carlo program called PTM. The aim of the study is to investigate the effect of atomic weight and the thickness of shielding materials on the gamma radiation attenuation ability. The linear attenuation coefficients of Aluminum (Al), Iron (Fe), and lead (Pb) elements were evaluated at photons energy of 661:7KeV that are considered to be emitted from a standard radioactive point source Cs 137. The experimental measurements have been performed for three materials to obtain these linear attenuation coefficients, using a Gamma NaI(Tl) scintillation detector. Our results have been compared with the simulation results of the linear attenuation coefficient using the XCOM database and Geant4 codes and reveal that they are well agreed with both simulation data. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=gamma%20photon" title="gamma photon">gamma photon</a>, <a href="https://publications.waset.org/abstracts/search?q=Monte%20Carlo%20program" title=" Monte Carlo program"> Monte Carlo program</a>, <a href="https://publications.waset.org/abstracts/search?q=radiation%20attenuation" title=" radiation attenuation"> radiation attenuation</a>, <a href="https://publications.waset.org/abstracts/search?q=shielding%20material" title=" shielding material"> shielding material</a>, <a href="https://publications.waset.org/abstracts/search?q=the%20linear%20attenuation%20coefficient" title=" the linear attenuation coefficient"> the linear attenuation coefficient</a> </p> <a href="https://publications.waset.org/abstracts/132610/simulation-of-gamma-rays-attenuation-coefficient-for-some-common-shielding-materials-using-monte-carlo-program" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/132610.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">203</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4056</span> Characterization of the Physical Properties of Sheep Wool Fiber in Amhara National Regional State</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Erkihun%20Zelalem">Erkihun Zelalem</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Ethiopian’s sheep population, estimated to be 25.5 million heads, is found widely distributed across the diverse agro-ecological zones of the country. In the past, there were many projects that done to improve production of meat, milk and productivity of sheep breed. However, no significance research has been done so far on production of wool fiber in Ethiopia which could be taken as a potential fiber next to cotton. The measurement of the sheep wool fiber physical properties is critically important, technical, commercial and certification point of view. A total of 24 sheep from different breeds (Menz, Tikur, Farta and Washera) were used in this study. Samples of fiber were analyzed using standard measurements for wool fiber length (WFL), mean fiber diameter (MFD), coefficient of variation of wool fiber diameter (FDCV), breaking strength, elongation, crimp, cleanness and moisture content. Based on the result all parameters shows that there is a great potential of getting of wool fiber from the skin of sheep and according to the standards of its property and grading system based on wool fiber fineness is medium to course. These types of fibers can be making carpets, blankets, rugs, coverings and other products. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Fiber" title="Fiber">Fiber</a>, <a href="https://publications.waset.org/abstracts/search?q=Fineness" title=" Fineness"> Fineness</a>, <a href="https://publications.waset.org/abstracts/search?q=Carpet" title=" Carpet"> Carpet</a>, <a href="https://publications.waset.org/abstracts/search?q=Fleece" title=" Fleece"> Fleece</a>, <a href="https://publications.waset.org/abstracts/search?q=Raw%20Wool" title=" Raw Wool"> Raw Wool</a> </p> <a href="https://publications.waset.org/abstracts/119161/characterization-of-the-physical-properties-of-sheep-wool-fiber-in-amhara-national-regional-state" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/119161.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">164</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4055</span> Damage Strain Analysis of Parallel Fiber Eutectic</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jian%20Zheng">Jian Zheng</a>, <a href="https://publications.waset.org/abstracts/search?q=Xinhua%20Ni"> Xinhua Ni</a>, <a href="https://publications.waset.org/abstracts/search?q=Xiequan%20Liu"> Xiequan Liu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> According to isotropy of parallel fiber eutectic, the no- damage strain field in parallel fiber eutectic is obtained from the flexibility tensor of parallel fiber eutectic. Considering the damage behavior of parallel fiber eutectic, damage variables are introduced to determine the strain field of parallel fiber eutectic. The damage strains in the matrix, interphase, and fiber of parallel fiber eutectic are quantitatively analyzed. Results show that damage strains are not only associated with the fiber volume fraction of parallel fiber eutectic, but also with the damage degree. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=damage%20strain" title="damage strain">damage strain</a>, <a href="https://publications.waset.org/abstracts/search?q=initial%20strain" title=" initial strain"> initial strain</a>, <a href="https://publications.waset.org/abstracts/search?q=fiber%20volume%20fraction" title=" fiber volume fraction"> fiber volume fraction</a>, <a href="https://publications.waset.org/abstracts/search?q=parallel%20fiber%20eutectic" title=" parallel fiber eutectic"> parallel fiber eutectic</a> </p> <a href="https://publications.waset.org/abstracts/60032/damage-strain-analysis-of-parallel-fiber-eutectic" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/60032.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">577</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4054</span> Separation of Composites for Recycling: Measurement of Electrostatic Charge of Carbon and Glass Fiber Particles</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=J.%20Thirunavukkarasu">J. Thirunavukkarasu</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Poulet"> M. Poulet</a>, <a href="https://publications.waset.org/abstracts/search?q=T.%20Turner"> T. Turner</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Pickering"> S. Pickering</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Composite waste from manufacturing can consist of different fiber materials, including blends of different fiber. Commercially, the recycling of composite waste is currently limited to carbon fiber waste and recycling glass fiber waste is currently not economically viable due to the low cost of virgin glass fiber and the reduced mechanical properties of the recovered fibers. For this reason, the recycling of hybrid fiber materials, where carbon fiber is combined with a proportion of glass fiber, cannot be processed economically. Therefore, a separation method is required to remove the glass fiber materials during the recycling process. An electrostatic separation method is chosen for this work because of the significant difference between carbon and glass fiber electrical properties. In this study, an experimental rig has been developed to measure the electrostatic charge achievable as the materials are passed through a tube. A range of particle lengths (80-100 µm, 6 mm and 12 mm), surface state conditions (0%SA, 2%SA and 6%SA), and several tube wall materials have been studied. A polytetrafluoroethylene (PTFE) tube and recycled without sizing agent was identified as the most suitable parameters for the electrical separation method. It was also found that shorter fiber lengths helped to encourage particle flow and attain higher charge values. These findings can be used to develop a separation process to enable the cost-effective recycling of hybrid fiber composite waste. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=electrostatic%20charging" title="electrostatic charging">electrostatic charging</a>, <a href="https://publications.waset.org/abstracts/search?q=hybrid%20fiber%20composites" title=" hybrid fiber composites"> hybrid fiber composites</a>, <a href="https://publications.waset.org/abstracts/search?q=recycling" title=" recycling"> recycling</a>, <a href="https://publications.waset.org/abstracts/search?q=short%20fiber%20composites" title=" short fiber composites"> short fiber composites</a> </p> <a href="https://publications.waset.org/abstracts/138679/separation-of-composites-for-recycling-measurement-of-electrostatic-charge-of-carbon-and-glass-fiber-particles" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/138679.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">129</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4053</span> Effects Induced by Dispersion-Promoting Cylinder on Fiber-Concentration Distributions in Pulp Suspension Flows</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20Sumida">M. Sumida</a>, <a href="https://publications.waset.org/abstracts/search?q=T.%20Fujimoto"> T. Fujimoto</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Fiber-concentration distributions in pulp liquid flows behind dispersion promoters were experimentally investigated to explore the feasibility of improving operational performance of hydraulic headboxes in papermaking machines. The proposed research was performed in the form of a basic test conducted on a screen-type model comprising a circular cylinder inserted within a channel. Tests were performed using pulp liquid possessing fiber concentrations ranging from 0.3-1.0 wt% under different flow velocities of 0.016-0.74 m/s. Fiber-concentration distributions were measured using the transmitted light attenuation method. Obtained test results were analyzed, and the influence of the flow velocities on wake characteristics behind the cylinder has been investigated with reference to findings of our preceding studies concerning pulp liquid flows in straight channels. Changes in fiber-concentration distribution along the flow direction were observed to be substantially large in the section from the cylinder to four times its diameter downstream of its centerline. Findings of this study provide useful information concerning the development of hydraulic headboxes. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=dispersion%20promoter" title="dispersion promoter">dispersion promoter</a>, <a href="https://publications.waset.org/abstracts/search?q=fiber-concentration%20distribution" title=" fiber-concentration distribution"> fiber-concentration distribution</a>, <a href="https://publications.waset.org/abstracts/search?q=hydraulic%20headbox" title=" hydraulic headbox"> hydraulic headbox</a>, <a href="https://publications.waset.org/abstracts/search?q=pulp%20liquid%20flow" title=" pulp liquid flow"> pulp liquid flow</a> </p> <a href="https://publications.waset.org/abstracts/93888/effects-induced-by-dispersion-promoting-cylinder-on-fiber-concentration-distributions-in-pulp-suspension-flows" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/93888.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">346</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4052</span> Research on Carbon Fiber Tow Spreading Technique with Multi-Rolls </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Soon%20Ok%20Jo">Soon Ok Jo</a>, <a href="https://publications.waset.org/abstracts/search?q=Han%20Kyu%20Jeung"> Han Kyu Jeung</a>, <a href="https://publications.waset.org/abstracts/search?q=Si%20Woo%20Park"> Si Woo Park</a> </p> <p class="card-text"><strong>Abstract:</strong></p> With the process of consistent expansion of carbon fiber in width (Carbon Fiber Tow Spreading Technique), it can be expected that such process can enhance the production of carbon fiber reinforced composite material and quality of the product. In this research, the method of mechanically expanding carbon fiber and increasing its width was investigated by using various geometric rolls. In addition, experimental type of carbon fiber expansion device was developed and tested using 12K carbon fiber. As a result, the effects of expansion of such fiber under optimized operating conditions and geometric structure of an elliptical roll, were analyzed. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=carbon%20fiber" title="carbon fiber">carbon fiber</a>, <a href="https://publications.waset.org/abstracts/search?q=tow%20spreading%20fiber" title=" tow spreading fiber"> tow spreading fiber</a>, <a href="https://publications.waset.org/abstracts/search?q=pre-preg" title=" pre-preg"> pre-preg</a>, <a href="https://publications.waset.org/abstracts/search?q=roll%20structure" title=" roll structure"> roll structure</a> </p> <a href="https://publications.waset.org/abstracts/51684/research-on-carbon-fiber-tow-spreading-technique-with-multi-rolls" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/51684.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">349</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4051</span> Electrostatic and Dielectric Measurements for Hair Building Fibers from DC to Microwave Frequencies</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=K.%20Y.%20You">K. Y. You</a>, <a href="https://publications.waset.org/abstracts/search?q=Y.%20L.%20Then"> Y. L. Then</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In the recent years, the hair building fiber has become popular, in other words, it is an effective method which helps people who suffer hair loss or sparse hair since the hair building fiber is capable to create a natural look of simulated hair rapidly. In the markets, there are a lot of hair fiber brands that have been designed to formulate an intense bond with hair strands and make the hair appear more voluminous instantly. However, those products have their own set of properties. Thus, in this report, some measurement techniques are proposed to identify those products. Up to five different brands of hair fiber are tested. The electrostatic and dielectric properties of the hair fibers are macroscopically tested using design DC and high-frequency microwave techniques. Besides, the hair fibers are microscopically analysis by magnifying the structures of the fiber using scanning electron microscope (SEM). From the SEM photos, the comparison of the uniformly shaped and broken rate of the hair fibers in the different bulk samples can be observed respectively. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=hair%20fiber" title="hair fiber">hair fiber</a>, <a href="https://publications.waset.org/abstracts/search?q=electrostatic" title=" electrostatic"> electrostatic</a>, <a href="https://publications.waset.org/abstracts/search?q=dielectric%20properties" title=" dielectric properties"> dielectric properties</a>, <a href="https://publications.waset.org/abstracts/search?q=broken%20rate" title=" broken rate"> broken rate</a>, <a href="https://publications.waset.org/abstracts/search?q=microwave%20techniques" title=" microwave techniques"> microwave techniques</a> </p> <a href="https://publications.waset.org/abstracts/25761/electrostatic-and-dielectric-measurements-for-hair-building-fibers-from-dc-to-microwave-frequencies" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/25761.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">312</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4050</span> Characteristics of PET-Based Conductive Fiber</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Chung-Yang%20Chuang">Chung-Yang Chuang</a>, <a href="https://publications.waset.org/abstracts/search?q=Chi-Lung%20Chen"> Chi-Lung Chen</a>, <a href="https://publications.waset.org/abstracts/search?q=Hui-Min%20Wang"> Hui-Min Wang</a>, <a href="https://publications.waset.org/abstracts/search?q=Chang-Jung%20Chang"> Chang-Jung Chang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Conductive fiber is the key material for e-textiles and wearable devices. However, the durability of the conductive fiber after the wash process is an important issue for conductive fiber applications in e-textiles. Therefore, it is necessary for conductive fiber with good performance on electrically conductive behavior during the product life cycle. In this research, the PET-based conductive fiber was prepared by silver conductive ink continuous coating. The conductive fiber showed low fiber resistance (10-¹~10Ω/cm), and the conductive behavior still had good performance (fiber resistance:10-¹~10Ω/cm， percentage of fiber resistance change:<60%) after the water wash durability test (AATCC-135， 30 times). This research provides a better solution to resolve the issues of resistance increase after the water wash process due to the damage to the conductive fiber structure. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=PET" title="PET">PET</a>, <a href="https://publications.waset.org/abstracts/search?q=conductive%20fiber" title=" conductive fiber"> conductive fiber</a>, <a href="https://publications.waset.org/abstracts/search?q=e-textiles" title=" e-textiles"> e-textiles</a>, <a href="https://publications.waset.org/abstracts/search?q=wearable%20devices" title=" wearable devices"> wearable devices</a> </p> <a href="https://publications.waset.org/abstracts/166142/characteristics-of-pet-based-conductive-fiber" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/166142.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">101</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4049</span> Impact of Different Modulation Techniques on the Performance of Free-Space Optics</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Naman%20Singla">Naman Singla</a>, <a href="https://publications.waset.org/abstracts/search?q=Ajay%20Pal%20Singh%20Chauhan"> Ajay Pal Singh Chauhan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> As the demand for providing high bit rate and high bandwidth is increasing at a rapid rate so there is a need to see in this problem and finds a technology that provides high bit rate and also high bandwidth. One possible solution is by use of optical fiber. Optical fiber technology provides high bandwidth in THz. But the disadvantage of optical fiber is of high cost and not used everywhere because it is not possible to reach all the locations on the earth. Also high maintenance required for usage of optical fiber. It puts a lot of cost. Another technology which is almost similar to optical fiber is Free Space Optics (FSO) technology. FSO is the line of sight technology where modulated optical beam whether infrared or visible is used to transfer information from one point to another through the atmosphere which works as a channel. This paper concentrates on analyzing the performance of FSO in terms of bit error rate (BER) and quality factor (Q) using different modulation techniques like non return to zero on off keying (NRZ-OOK), differential phase shift keying (DPSK) and differential quadrature phase shift keying (DQPSK) using OptiSystem software. The findings of this paper show that FSO system based on DQPSK modulation technique performs better. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=attenuation" title="attenuation">attenuation</a>, <a href="https://publications.waset.org/abstracts/search?q=bit%20rate" title=" bit rate"> bit rate</a>, <a href="https://publications.waset.org/abstracts/search?q=free%20space%20optics" title=" free space optics"> free space optics</a>, <a href="https://publications.waset.org/abstracts/search?q=link%20length" title=" link length"> link length</a> </p> <a href="https://publications.waset.org/abstracts/63285/impact-of-different-modulation-techniques-on-the-performance-of-free-space-optics" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/63285.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">347</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4048</span> Polydimethylsiloxane Applications in Interferometric Optical Fiber Sensors</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Zeenat%20Parveen">Zeenat Parveen</a>, <a href="https://publications.waset.org/abstracts/search?q=Ashiq%20Hussain"> Ashiq Hussain</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This review paper consists of applications of PDMS (polydimethylsiloxane) materials for enhanced performance, optical fiber sensors in acousto-ultrasonic, mechanical measurements, current applications, sensing, measurements and interferometric optical fiber sensors. We will discuss the basic working principle of fiber optic sensing technology, various types of fiber optic and the PDMS as a coating material to increase the performance. Optical fiber sensing methods for detecting dynamic strain signals, including general sound and acoustic signals, high frequency signals i.e. ultrasonic/ultrasound, and other signals such as acoustic emission and impact induced dynamic strain. Optical fiber sensors have Industrial and civil engineering applications in mechanical measurements. Sometimes it requires different configurations and parameters of sensors. Optical fiber current sensors are based on Faraday Effect due to which we obtain better performance as compared to the conventional current transformer. Recent advancement and cost reduction has simulated interest in optical fiber sensing. Optical techniques are also implemented in material measurement. Fiber optic interferometers are used to sense various physical parameters including temperature, pressure and refractive index. There are four types of interferometers i.e. Fabry–perot, Mach-Zehnder, Michelson, and Sagnac. This paper also describes the future work of fiber optic sensors. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fiber%20optic%20sensing" title="fiber optic sensing">fiber optic sensing</a>, <a href="https://publications.waset.org/abstracts/search?q=PDMS%20materials" title=" PDMS materials"> PDMS materials</a>, <a href="https://publications.waset.org/abstracts/search?q=acoustic" title=" acoustic"> acoustic</a>, <a href="https://publications.waset.org/abstracts/search?q=ultrasound" title=" ultrasound"> ultrasound</a>, <a href="https://publications.waset.org/abstracts/search?q=current%20sensor" title=" current sensor"> current sensor</a>, <a href="https://publications.waset.org/abstracts/search?q=mechanical%20measurements" title=" mechanical measurements"> mechanical measurements</a> </p> <a href="https://publications.waset.org/abstracts/16171/polydimethylsiloxane-applications-in-interferometric-optical-fiber-sensors" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/16171.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">388</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4047</span> Numerical Study of Fiber Bragg Grating Sensor: Longitudinal and Transverse Detection of Temperature and Strain</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=K.%20Khelil">K. Khelil</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20Ammar"> H. Ammar</a>, <a href="https://publications.waset.org/abstracts/search?q=K.%20Saouchi"> K. Saouchi </a> </p> <p class="card-text"><strong>Abstract:</strong></p> Fiber Bragg Grating (FBG) structure is an periodically modulated optical fiber. It acts as a selective filter of wavelength whose reflected peak is called Bragg wavelength and it depends on the period of the fiber and the refractive index. The simulation of FBG is based on solving the Coupled Mode Theory equation by using the Transfer Matrix Method which is carried out using MATLAB. It is found that spectral reflectivity is shifted when the change of temperature and strain is uniform. Under non-uniform temperature or strain perturbation, the spectrum is both shifted and destroyed. In case of transverse loading, reflectivity spectrum is split into two peaks, the first is specific to X axis, and the second belongs to Y axis. FBGs are used in civil engineering to detect perturbations applied to buildings. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Bragg%20wavelength" title="Bragg wavelength">Bragg wavelength</a>, <a href="https://publications.waset.org/abstracts/search?q=coupled%20mode%20theory" title=" coupled mode theory"> coupled mode theory</a>, <a href="https://publications.waset.org/abstracts/search?q=optical%20fiber" title=" optical fiber"> optical fiber</a>, <a href="https://publications.waset.org/abstracts/search?q=temperature%20measurement" title=" temperature measurement"> temperature measurement</a> </p> <a href="https://publications.waset.org/abstracts/80169/numerical-study-of-fiber-bragg-grating-sensor-longitudinal-and-transverse-detection-of-temperature-and-strain" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/80169.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">494</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4046</span> A Study on the Improvement of the Bond Performance of Polypropylene Macro Fiber according to Longitudinal Shape Change</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sung-yong%20Choi">Sung-yong Choi</a>, <a href="https://publications.waset.org/abstracts/search?q=Woo-tai%20Jung"> Woo-tai Jung</a>, <a href="https://publications.waset.org/abstracts/search?q=Young-hwan%20Park"> Young-hwan Park</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study intends to improve the bond performance of the polypropylene fiber used as reinforcing fiber for concrete by changing its shape into double crimped type through the enhancement its fabrication process. The bond performance of such double crimped fiber is evaluated by applying the JCI SF-8 (dog-bone shape) testing method. The test results reveal that the double crimped fiber develops bond performance improved by more than 19% compared to the conventional crimped type fiber. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Bond" title="Bond">Bond</a>, <a href="https://publications.waset.org/abstracts/search?q=Polypropylene" title=" Polypropylene"> Polypropylene</a>, <a href="https://publications.waset.org/abstracts/search?q=fiber%20reinforcement" title=" fiber reinforcement"> fiber reinforcement</a>, <a href="https://publications.waset.org/abstracts/search?q=macro%20fiber" title=" macro fiber"> macro fiber</a>, <a href="https://publications.waset.org/abstracts/search?q=shape%20change" title=" shape change"> shape change</a> </p> <a href="https://publications.waset.org/abstracts/1536/a-study-on-the-improvement-of-the-bond-performance-of-polypropylene-macro-fiber-according-to-longitudinal-shape-change" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/1536.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">462</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4045</span> Compensation of Cable Attenuation in Step Current Generators to Enable the Convolution Method for Calibration of Current Transducers</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=P.%20Treyer">P. Treyer</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Kujda"> M. Kujda</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20Urs"> H. Urs</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The purpose of this paper is to digitally compensate for the apparent discharge time constant of the coaxial cable so that the current step response is flat and can be used to calibrate current transducers using the convolution method. For proper use of convolution, the step response record length is required to be at least the same as the waveform duration to be evaluated. The current step generator based on the cable discharge is compared to the Blumlein generator. Moreover, the influence of each component of the system on the performance of the step is described, which allows building the appropriate measurement set-up. In the end, the calibration of current viewing resistors dedicated to high current impulse is computed. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Blumlein%20generator" title="Blumlein generator">Blumlein generator</a>, <a href="https://publications.waset.org/abstracts/search?q=cable%20attenuation" title=" cable attenuation"> cable attenuation</a>, <a href="https://publications.waset.org/abstracts/search?q=convolution" title=" convolution"> convolution</a>, <a href="https://publications.waset.org/abstracts/search?q=current%20step%20generator" title=" current step generator"> current step generator</a> </p> <a href="https://publications.waset.org/abstracts/130233/compensation-of-cable-attenuation-in-step-current-generators-to-enable-the-convolution-method-for-calibration-of-current-transducers" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/130233.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">149</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4044</span> The Contribution of Density Fluctuations in Ultrasound Scattering in Cancellous Bone</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20Elsariti">A. Elsariti</a>, <a href="https://publications.waset.org/abstracts/search?q=T.%20Evans"> T. Evans </a> </p> <p class="card-text"><strong>Abstract:</strong></p> An understanding of the interaction between acoustic waves and cancellous bone is needed in order to realize the full clinical potential of ultrasonic bone measurements. Scattering is likely to be of central importance but has received little attention to date. Few theoretical approaches have been described to explain scattering of ultrasound from bone. In this study, a scattering model based on velocity and density fluctuations in a binary mixture (marrow fat and cortical matrix) was used to estimate the ultrasonic attenuation in cancellous bone as a function of volume fraction. Predicted attenuation and backscatter coefficient were obtained for a range of porosities and scatterer size. At 600 kHZ and for different scatterer size the effect of velocity and density fluctuations in the predicted attenuation was approximately 60% higher than velocity fluctuations. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ultrasound%20scattering" title="ultrasound scattering">ultrasound scattering</a>, <a href="https://publications.waset.org/abstracts/search?q=sound%20speed" title=" sound speed"> sound speed</a>, <a href="https://publications.waset.org/abstracts/search?q=density%20fluctuations" title=" density fluctuations"> density fluctuations</a>, <a href="https://publications.waset.org/abstracts/search?q=attenuation%20coefficient" title=" attenuation coefficient "> attenuation coefficient </a> </p> <a href="https://publications.waset.org/abstracts/4810/the-contribution-of-density-fluctuations-in-ultrasound-scattering-in-cancellous-bone" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/4810.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">326</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4043</span> Simulation of Fiber Deposition on Molded Fiber Screen Using Multi-Sphere Discrete Element Method</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Kim%20Quy%20Le">Kim Quy Le</a>, <a href="https://publications.waset.org/abstracts/search?q=Duan%20Fei"> Duan Fei</a>, <a href="https://publications.waset.org/abstracts/search?q=Jia%20Wei%20Chew"> Jia Wei Chew</a>, <a href="https://publications.waset.org/abstracts/search?q=Jun%20Zeng"> Jun Zeng</a>, <a href="https://publications.waset.org/abstracts/search?q=Maria%20Fabiola%20Leyva"> Maria Fabiola Leyva</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In line with the sustainable development goal, molded fiber products play important roles in reducing plastic-based packaging. To fabricate molded fiber products, besides using conventional meshing tools, 3D printing is employed to manufacture the molded fiber screen. 3D printing technique allows printing molded fiber screens with complex geometry, flexible in pore size and shape. The 3D printed molded fiber screens are in the progress of investigation to improve the de-watering efficiency, fiber collection, mechanical strength, etc. In addition, the fiber distribution on the screen is also necessary to access the quality of the screen. Besides using experimental methods to capture the fiber distribution on screen, simulation also offers using tools to access the uniformity of fiber. In this study, the fiber was simulated using the multi-sphere model to simulate the fibers. The interaction of the fibers was able to mimic by employing the discrete element method. The fiber distribution was captured and compared to the experiment. The simulation results were able to reveal the fiber deposition layer upon layer and explain the formation of uneven thickness on the tilted area of molded fiber screen. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=3D%20printing" title="3D printing">3D printing</a>, <a href="https://publications.waset.org/abstracts/search?q=multi-jet%20fusion" title=" multi-jet fusion"> multi-jet fusion</a>, <a href="https://publications.waset.org/abstracts/search?q=molded%20fiber%20screen" title=" molded fiber screen"> molded fiber screen</a>, <a href="https://publications.waset.org/abstracts/search?q=discrete%20element%20method" title=" discrete element method"> discrete element method</a> </p> <a href="https://publications.waset.org/abstracts/157099/simulation-of-fiber-deposition-on-molded-fiber-screen-using-multi-sphere-discrete-element-method" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/157099.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">114</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4042</span> Effect of Fiber Content and Chemical Treatment on Hardness of Bagasse Fiber Reinforced Epoxy Composites</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Varun%20Mittal">Varun Mittal</a>, <a href="https://publications.waset.org/abstracts/search?q=Shishir%20Sinha"> Shishir Sinha</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The present experimental study focused on the hardness behavior of bagasse fiber-epoxy composites. The relationship between bagasse fiber content and effect of chemical treatment on bagasse fiber as a function of Brinell hardness of bagasse fiber epoxy was investigated. Bagasse fiber was treated with sodium hydroxide followed by acrylic acid before they were reinforced with epoxy resin. Compared hardness properties with the untreated bagasse filled epoxy composites. It was observed that Brinell hardness increased up to 15 wt% fiber content and further decreases, however, chemical treatment also improved the hardness properties of composites. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=bagasse%20fiber" title="bagasse fiber">bagasse fiber</a>, <a href="https://publications.waset.org/abstracts/search?q=composite" title=" composite"> composite</a>, <a href="https://publications.waset.org/abstracts/search?q=hardness" title=" hardness"> hardness</a>, <a href="https://publications.waset.org/abstracts/search?q=sodium%20hydroxide" title=" sodium hydroxide"> sodium hydroxide</a> </p> <a href="https://publications.waset.org/abstracts/52160/effect-of-fiber-content-and-chemical-treatment-on-hardness-of-bagasse-fiber-reinforced-epoxy-composites" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/52160.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">286</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4041</span> Influence of Chirp of High-Speed Laser Diodes and Fiber Dispersion on Performance of Non-Amplified 40-Gbps Optical Fiber Links</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20Bakry">Ahmed Bakry</a>, <a href="https://publications.waset.org/abstracts/search?q=Moustafa%20Ahmed"> Moustafa Ahmed</a> </p> <p class="card-text"><strong>Abstract:</strong></p> We model and simulate the combined effect of fiber dispersion and frequency chirp of a directly modulated high-speed laser diode on the figures of merit of a non-amplified 40-Gbps optical fiber link. We consider both the return to zero (RZ) and non-return to zero (NRZ) patterns of the pseudorandom modulation bits. The performance of the fiber communication system is assessed by the fiber-length limitation due to the fiber dispersion. We study the influence of replacing standard single-mode fibers by non-zero dispersion-shifted fibers on the maximum fiber length and evaluate the associated power penalty. We introduce new dispersion tolerances for 1-dB power penalty of the RZ and NRZ 40-Gbps optical fiber links. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=bit%20error%20rate" title="bit error rate">bit error rate</a>, <a href="https://publications.waset.org/abstracts/search?q=dispersion" title=" dispersion"> dispersion</a>, <a href="https://publications.waset.org/abstracts/search?q=frequency%20chirp" title=" frequency chirp"> frequency chirp</a>, <a href="https://publications.waset.org/abstracts/search?q=fiber%20communications" title=" fiber communications"> fiber communications</a>, <a href="https://publications.waset.org/abstracts/search?q=semiconductor%20laser" title=" semiconductor laser"> semiconductor laser</a> </p> <a href="https://publications.waset.org/abstracts/10587/influence-of-chirp-of-high-speed-laser-diodes-and-fiber-dispersion-on-performance-of-non-amplified-40-gbps-optical-fiber-links" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/10587.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">641</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4040</span> Measurement of Temperature, Humidity and Strain Variation Using Bragg Sensor</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Amira%20Zrelli">Amira Zrelli</a>, <a href="https://publications.waset.org/abstracts/search?q=Tahar%20Ezzeddine"> Tahar Ezzeddine</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Measurement and monitoring of temperature, humidity and strain variation are very requested in great fields and areas such as structural health monitoring (SHM) systems. Currently, the use of fiber Bragg grating sensors (FBGS) is very recommended in SHM systems due to the specifications of these sensors. In this paper, we present the theory of Bragg sensor, therefore we try to measure the efficient variation of strain, temperature and humidity (SV, ST, SH) using Bragg sensor. Thus, we can deduce the fundamental relation between these parameters and the wavelength of Bragg sensor. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Fiber%20Bragg%20Grating%20Sensors%20%28FBGS%29" title="Fiber Bragg Grating Sensors (FBGS)">Fiber Bragg Grating Sensors (FBGS)</a>, <a href="https://publications.waset.org/abstracts/search?q=strain" title=" strain"> strain</a>, <a href="https://publications.waset.org/abstracts/search?q=temperature" title=" temperature"> temperature</a>, <a href="https://publications.waset.org/abstracts/search?q=humidity" title=" humidity"> humidity</a>, <a href="https://publications.waset.org/abstracts/search?q=structural%20health%20monitoring%20%28SHM%29" title=" structural health monitoring (SHM)"> structural health monitoring (SHM)</a> </p> <a href="https://publications.waset.org/abstracts/69360/measurement-of-temperature-humidity-and-strain-variation-using-bragg-sensor" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/69360.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">316</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4039</span> Compressive Strength of Synthetic Fiber Reinforced Concretes</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Soner%20Guler">Soner Guler</a>, <a href="https://publications.waset.org/abstracts/search?q=Demet%20Yavuz"> Demet Yavuz</a>, <a href="https://publications.waset.org/abstracts/search?q=Fuat%20Korkut"> Fuat Korkut</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Synthetic fibers are commonly used in many civil engineering applications because of its some superior characteristics such as non-corrosive and cheapness. This study presents the results of experimental study on compressive strength of synthetic fiber reinforced concretes. Two types of polyamide (PA) synthetic fiber with the length of 12 and 54 mm are used for this study. The fiber volume ratio is kept as 0.25%, 0.75%, and 0.75% in all mixes. The plain concrete compressive strength is 36.2 MPa. The test results clearly show that the increase in compressive strength for synthetic fiber reinforced concretes is significant. The greatest increase in compressive strength is 23% for PA synthetic fiber reinforced concretes with 0.75% fiber volume. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=synthetic%20fibers" title="synthetic fibers">synthetic fibers</a>, <a href="https://publications.waset.org/abstracts/search?q=polyamide%20fibers" title=" polyamide fibers"> polyamide fibers</a>, <a href="https://publications.waset.org/abstracts/search?q=fiber%20volume" title=" fiber volume"> fiber volume</a>, <a href="https://publications.waset.org/abstracts/search?q=compressive%20strength" title=" compressive strength"> compressive strength</a> </p> <a href="https://publications.waset.org/abstracts/53592/compressive-strength-of-synthetic-fiber-reinforced-concretes" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/53592.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">527</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4038</span> The Effect of the Acquisition and Reconstruction Parameters in Quality of Spect Tomographic Images with Attenuation and Scatter Correction</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=N.%20Boutaghane">N. Boutaghane</a>, <a href="https://publications.waset.org/abstracts/search?q=F.%20Z.%20Tounsi"> F. Z. Tounsi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Many physical and technological factors degrade the SPECT images, both qualitatively and quantitatively. For this, it is not always put into leading technological advances to improve the performance of tomographic gamma camera in terms of detection, collimation, reconstruction and correction of tomographic images methods. We have to master firstly the choice of various acquisition and reconstruction parameters, accessible to clinical cases and using the attenuation and scatter correction methods to always optimize quality image and minimized to the maximum dose received by the patient. In this work, an evaluation of qualitative and quantitative tomographic images is performed based on the acquisition parameters (counts per projection) and reconstruction parameters (filter type, associated cutoff frequency). In addition, methods for correcting physical effects such as attenuation and scatter degrading the image quality and preventing precise quantitative of the reconstructed slices are also presented. Two approaches of attenuation and scatter correction are implemented: the attenuation correction by CHANG method with a filtered back projection reconstruction algorithm and scatter correction by the subtraction JASZCZAK method. Our results are considered as such recommandation, which permits to determine the origin of the different artifacts observed both in quality control tests and in clinical images. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=attenuation" title="attenuation">attenuation</a>, <a href="https://publications.waset.org/abstracts/search?q=scatter" title=" scatter"> scatter</a>, <a href="https://publications.waset.org/abstracts/search?q=reconstruction%20filter" title=" reconstruction filter"> reconstruction filter</a>, <a href="https://publications.waset.org/abstracts/search?q=image%20quality" title=" image quality"> image quality</a>, <a href="https://publications.waset.org/abstracts/search?q=acquisition%20and%20reconstruction%20parameters" title=" acquisition and reconstruction parameters"> acquisition and reconstruction parameters</a>, <a href="https://publications.waset.org/abstracts/search?q=SPECT" title=" SPECT"> SPECT</a> </p> <a href="https://publications.waset.org/abstracts/38755/the-effect-of-the-acquisition-and-reconstruction-parameters-in-quality-of-spect-tomographic-images-with-attenuation-and-scatter-correction" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/38755.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">453</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4037</span> Distributed Optical Fiber Vibration Sensing Using Phase Generated Carrier Demodulation Algorithm</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Zhihua%20Yu">Zhihua Yu</a>, <a href="https://publications.waset.org/abstracts/search?q=Qi%20Zhang"> Qi Zhang</a>, <a href="https://publications.waset.org/abstracts/search?q=Mingyu%20Zhang"> Mingyu Zhang</a>, <a href="https://publications.waset.org/abstracts/search?q=Haolong%20Dai"> Haolong Dai</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Distributed fiber-optic vibration sensors are gaining extensive attention, for the advantages of high sensitivity, accurate location, light weight, large-scale monitoring, good concealment, and etc. In this paper, a novel optical fiber distributed vibration sensing system is proposed, which is based on self-interference of Rayleigh backscattering with phase generated carrier (PGC) demodulation algorithm. Pulsed lights are sent into the sensing fiber and the Rayleigh backscattering light from a certain position along the sensing fiber would interfere through an unbalanced Michelson Interferometry (MI) to generate the interference light. An improved PGC demodulation algorithm is carried out to recover the phase information of the interference signal, which carries the sensing information. Three vibration events were applied simultaneously to different positions over 2000m sensing fiber and demodulated correctly. Experiments show that the spatial resolution of is 10 m, and the noise level of the Φ-OTDR system is about 10-3 rad/√Hz, and the signal to noise ratio (SNR) is about 30.34dB. This vibration measurement scheme can be applied at surface, seabed or downhole for vibration measurements or distributed acoustic sensing (DAS). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fiber%20optics%20sensors" title="fiber optics sensors">fiber optics sensors</a>, <a href="https://publications.waset.org/abstracts/search?q=Michelson%20interferometry" title=" Michelson interferometry"> Michelson interferometry</a>, <a href="https://publications.waset.org/abstracts/search?q=MI" title=" MI"> MI</a>, <a href="https://publications.waset.org/abstracts/search?q=phase-sensitive%20optical%20time%20domain%20reflectometry" title=" phase-sensitive optical time domain reflectometry"> phase-sensitive optical time domain reflectometry</a>, <a href="https://publications.waset.org/abstracts/search?q=%CE%A6-OTDR" title=" Φ-OTDR"> Φ-OTDR</a>, <a href="https://publications.waset.org/abstracts/search?q=phase%20generated%20carrier" title=" phase generated carrier"> phase generated carrier</a>, <a href="https://publications.waset.org/abstracts/search?q=PGC" title=" PGC"> PGC</a> </p> <a href="https://publications.waset.org/abstracts/93881/distributed-optical-fiber-vibration-sensing-using-phase-generated-carrier-demodulation-algorithm" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/93881.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">190</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4036</span> Water Depth and Optical Attenuation Characteristics of Natural Water Reservoirs nearby Kolkata City Assessed from Hyperion Hyperspectral and LISS-3 Multispectral Images</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Barun%20Raychaudhuri">Barun Raychaudhuri</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A methodology is proposed for estimating the optical attenuation and proportional depth variation of shallow inland water. The process is demonstrated with EO-1 Hyperion hyperspectral and IRS-P6 LISS-3 multispectral images of Kolkata city nearby area centered around 22º33′ N 88º26′ E. The attenuation coefficient of water was found to change with fine resolution of wavebands and in presence of suspended organic matter in water. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=hyperion" title="hyperion">hyperion</a>, <a href="https://publications.waset.org/abstracts/search?q=hyperspectral" title=" hyperspectral"> hyperspectral</a>, <a href="https://publications.waset.org/abstracts/search?q=Kolkata" title=" Kolkata"> Kolkata</a>, <a href="https://publications.waset.org/abstracts/search?q=water%20depth" title=" water depth"> water depth</a> </p> <a href="https://publications.waset.org/abstracts/13609/water-depth-and-optical-attenuation-characteristics-of-natural-water-reservoirs-nearby-kolkata-city-assessed-from-hyperion-hyperspectral-and-liss-3-multispectral-images" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/13609.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">246</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4035</span> Performance of Fiber Reinforced Self-Compacting Concrete Containing Different Pozzolanic Materials</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20Fathi%20Mohamed">Ahmed Fathi Mohamed</a>, <a href="https://publications.waset.org/abstracts/search?q=Nasir%20Shafiq"> Nasir Shafiq</a>, <a href="https://publications.waset.org/abstracts/search?q=Muhd%20Fadhil%20Nuruddin"> Muhd Fadhil Nuruddin</a>, <a href="https://publications.waset.org/abstracts/search?q=Ali%20Elheber%20Ahmed"> Ali Elheber Ahmed</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Steel fiber adds to Self-Compacting Concrete (SCC) to enhance it is properties and achieves the requirement. This research work focus on the using of different percentage of steel fiber in SCC mixture contains fly ash and microwave incinerator rice husk ash (MIRHA) as supplementary material. Fibers affect several characteristics of SCC in the fresh and the hardened state. To optimize fiber-reinforced self-compacting concrete (FSCC), The possible fiber content of a given mix composition is an essential input parameter. The aim of the research is to study the properties of fiber reinforced self–compacting (FRSCC) and to develop the expert system/computer program of mix proportion for calculating the steel fiber content and pozzolanic replacement that can be applied to investigate the compressive strength of FSCC mix. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=self-compacting%20concrete" title="self-compacting concrete">self-compacting concrete</a>, <a href="https://publications.waset.org/abstracts/search?q=silica%20fume" title=" silica fume"> silica fume</a>, <a href="https://publications.waset.org/abstracts/search?q=steel%20fiber" title=" steel fiber"> steel fiber</a>, <a href="https://publications.waset.org/abstracts/search?q=fresh%20taste" title=" fresh taste"> fresh taste</a> </p> <a href="https://publications.waset.org/abstracts/1321/performance-of-fiber-reinforced-self-compacting-concrete-containing-different-pozzolanic-materials" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/1321.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">574</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4034</span> Damage Micromechanisms of Coconut Fibers and Chopped Strand Mats of Coconut Fibers</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Rios%20A.%20S.">Rios A. S.</a>, <a href="https://publications.waset.org/abstracts/search?q=Hild%20F."> Hild F.</a>, <a href="https://publications.waset.org/abstracts/search?q=Deus%20E.%20P."> Deus E. P.</a>, <a href="https://publications.waset.org/abstracts/search?q=Aimedieu%20P."> Aimedieu P.</a>, <a href="https://publications.waset.org/abstracts/search?q=Benallal%20A."> Benallal A.</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The damage micromechanisms of chopped strand mats manufactured by compression of Brazilian coconut fiber and coconut fibers in different external conditions (chemical treatment) were used in this study. Mechanical analysis testing uniaxial traction were used with Digital Image Correlation (DIC). The images captured during the tensile test in the coconut fibers and coconut fiber mats showed an uncertainty of measurement in order centipixels. The initial modulus (modulus of elasticity) and tensile strength decreased with increasing diameter for the four conditions of coconut fibers. The DIC showed heterogeneous deformation fields for coconut fibers and mats and the displacement fields showed the rupture process of coconut fiber. The determination of poisson’s ratio of the mat was performed through of transverse and longitudinal deformations found in the elastic region. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=coconut%20fiber" title="coconut fiber">coconut fiber</a>, <a href="https://publications.waset.org/abstracts/search?q=mechanical%20behavior" title=" mechanical behavior"> mechanical behavior</a>, <a href="https://publications.waset.org/abstracts/search?q=digital%20image%20correlation" title=" digital image correlation"> digital image correlation</a>, <a href="https://publications.waset.org/abstracts/search?q=micromechanism" title=" micromechanism"> micromechanism</a> </p> <a href="https://publications.waset.org/abstracts/20660/damage-micromechanisms-of-coconut-fibers-and-chopped-strand-mats-of-coconut-fibers" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/20660.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">459</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4033</span> Effects of Duct Geometry, Thickness and Types of Liners on Transmission Loss for Absorptive Silencers</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20Kashfi">M. Kashfi</a>, <a href="https://publications.waset.org/abstracts/search?q=K.%20Jahani"> K. Jahani</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Sound attenuation in absorptive silencers has been analyzed in this paper. The structure of such devices is as follows. When the rigid duct of an expansion chamber has been lined by a packed absorptive material under a perforated membrane, incident sound waves will be dissipated by the absorptive liners. This kind of silencer, usually are applicable for medium to high frequency ranges. Several conditions for different absorptive materials, variety in their thicknesses, and different shapes of the expansion chambers have been studied in this paper. Also, graphs of sound attenuation have been compared between empty expansion chamber and duct of silencer with applying liner. Plane waves have been assumed in inlet and outlet regions of the silencer. Presented results that have been achieved by applying finite element method (FEM), have shown the dependence of the sound attenuation spectrum to flow resistivity and the thicknesses of the absorptive materials, and geometries of the cross section (configuration of the silencer). As flow resistivity and thickness of absorptive materials increase, sound attenuation improves. In this paper, diagrams of the transmission loss (TL) for absorptive silencers in five different cross sections (rectangle, circle, ellipse, square, and rounded rectangle as the main geometry) have been presented. Also, TL graphs for silencers using different absorptive material (glass wool, wood fiber, and kind of spongy materials) as liner with three different thicknesses of 5 mm, 15 mm, and 30 mm for glass wool liner have been exhibited. At first, the effect of substances of the absorptive materials with the specific flow resistivity and densities on the TL spectrum, then the effect of the thicknesses of the glass wool, and at last the efficacy of the shape of the cross section of the silencer have been investigated. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=transmission%20loss" title="transmission loss">transmission loss</a>, <a href="https://publications.waset.org/abstracts/search?q=absorptive%20material" title=" absorptive material"> absorptive material</a>, <a href="https://publications.waset.org/abstracts/search?q=flow%20resistivity" title=" flow resistivity"> flow resistivity</a>, <a href="https://publications.waset.org/abstracts/search?q=thickness" title=" thickness"> thickness</a>, <a href="https://publications.waset.org/abstracts/search?q=frequency" title=" frequency"> frequency</a> </p> <a href="https://publications.waset.org/abstracts/49773/effects-of-duct-geometry-thickness-and-types-of-liners-on-transmission-loss-for-absorptive-silencers" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/49773.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">250</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4032</span> Impact Modified Oil Palm Empty Fruit Bunch Fiber/Poly(Lactic) Acid Composite</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20D.%20H.%20Beg">Mohammad D. H. Beg</a>, <a href="https://publications.waset.org/abstracts/search?q=John%20O.%20Akindoyo"> John O. Akindoyo</a>, <a href="https://publications.waset.org/abstracts/search?q=Suriati%20Ghazali"> Suriati Ghazali</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdullah%20A.%20Mamun"> Abdullah A. Mamun</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, composites were fabricated from oil palm empty fruit bunch fiber and poly(lactic) acid by extrusion followed by injection moulding. Surface of the fiber was pre-treated by ultrasound in an alkali medium and treatment efficiency was investigated by scanning electron microscopy (SEM) analysis and Fourier transforms infrared spectrometer (FTIR). Effect of fiber treatment on composite was characterized by tensile strength (TS), tensile modulus (TM) and impact strength (IS). Furthermore, biostrong impact modifier was incorporated into the treated fiber composite to improve its impact properties. Mechanical testing showed an improvement of up to 23.5% and 33.6% respectively for TS and TM of treated fiber composite above untreated fiber composite. On the other hand incorporation of impact modifier led to enhancement of about 20% above the initial IS of the treated fiber composite. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fiber%20treatment" title="fiber treatment">fiber treatment</a>, <a href="https://publications.waset.org/abstracts/search?q=impact%20modifier" title=" impact modifier"> impact modifier</a>, <a href="https://publications.waset.org/abstracts/search?q=natural%20fibers" title=" natural fibers"> natural fibers</a>, <a href="https://publications.waset.org/abstracts/search?q=ultrasound" title=" ultrasound"> ultrasound</a> </p> <a href="https://publications.waset.org/abstracts/17108/impact-modified-oil-palm-empty-fruit-bunch-fiberpolylactic-acid-composite" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/17108.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 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