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vessels</title> <meta name="description" content="Search results for: surface vessels"> <meta name="keywords" content="surface vessels"> <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> <button class="d-block d-lg-none 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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="surface vessels"> <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> 6887</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: surface vessels</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6887</span> Development and Test of an Open Source PX4 Controler for omnidirectional Unmanned Surface Vehicle</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Norbert%20Szulc">Norbert Szulc</a>, <a href="https://publications.waset.org/abstracts/search?q=Cezary%20Wieczorkowski"> Cezary Wieczorkowski</a>, <a href="https://publications.waset.org/abstracts/search?q=Igor%20Baranowski"> Igor Baranowski</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, a control system that bridges the gap in support for Unmanned Surface Vessels in the PX4 Opensource Autopilot was developed. The system is designed for an omnidirectional water craft with four motors. A modular autopilot architecture design centred around publish-subscribe interprocess communication was used. The paper presents the implementation and integration process of a generic surface vehicle controller capable of driving any configuration of motors through the recently introduced in control allocator in PX4 autopilot. The proposed approach was successfully tested in a case study through implementation on the ASV Perkoz. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=control%20system" title="control system">control system</a>, <a href="https://publications.waset.org/abstracts/search?q=PX4" title=" PX4"> PX4</a>, <a href="https://publications.waset.org/abstracts/search?q=drones" title=" drones"> drones</a>, <a href="https://publications.waset.org/abstracts/search?q=rovers" title=" rovers"> rovers</a>, <a href="https://publications.waset.org/abstracts/search?q=surface%20vessels" title=" surface vessels"> surface vessels</a>, <a href="https://publications.waset.org/abstracts/search?q=omnidirectional" title=" omnidirectional"> omnidirectional</a> </p> <a href="https://publications.waset.org/abstracts/163531/development-and-test-of-an-open-source-px4-controler-for-omnidirectional-unmanned-surface-vehicle" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/163531.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">87</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">6886</span> Hydrodynamic Behaviour Study of Fast Mono-Hull and Catamaran Vessels in Calm Waters Using Free Surface Flow Analysis</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20Sadeghian">Mohammad Sadeghian</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohsen%20Sadeghian"> Mohsen Sadeghian</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, planning catamaran and mono-hull vessels resistance and trim in calm waters were considered. Hydrodynamic analysis of fast mono-hull planning vessel was also investigated. For hull form geometry optimization, numerical methods of different parameters were used for this type of vessels. Hull material was selected as carbon fiber composite. Exact architectural aspects were specified and stability calculations were performed, as well. Hydrodynamic calculations to extract the resistance force using semi-analytical methods and numerical modeling were carried out. Free surface numerical analysis of vessel in designed draft using finite volume method and double phase were evaluated and verified by experimental tests. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fast%20vessel" title="fast vessel">fast vessel</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrostatic%20and%20hydrodynamic%20optimization" title=" hydrostatic and hydrodynamic optimization"> hydrostatic and hydrodynamic optimization</a>, <a href="https://publications.waset.org/abstracts/search?q=free%20surface%20flow" title=" free surface flow"> free surface flow</a>, <a href="https://publications.waset.org/abstracts/search?q=computational%20fluid%20dynamics" title=" computational fluid dynamics"> computational fluid dynamics</a> </p> <a href="https://publications.waset.org/abstracts/9547/hydrodynamic-behaviour-study-of-fast-mono-hull-and-catamaran-vessels-in-calm-waters-using-free-surface-flow-analysis" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/9547.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">281</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">6885</span> Hydrodynamic Behavior Study of Fast Mono Hull and Catamaran Vessels in Calm Waters Using Free Surface Flow Analysis</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20Ali%20Badri">Mohammad Ali Badri</a>, <a href="https://publications.waset.org/abstracts/search?q=Pouya%20Molana"> Pouya Molana</a>, <a href="https://publications.waset.org/abstracts/search?q=Amin%20Rezvanpour"> Amin Rezvanpour</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, planning catamaran and mono-hull vessels resistance and trim in calm waters were considered. Hydrodynamic analysis of fast mono-hull planning vessel was also investigated. In order to hull form geometry optimization, numerical methods of different parameters were used for this type of vessels. Hull material was selected in carbon fiber composite. Exact architectural aspects were specified and stability calculations were performed as well. Hydrodynamic calculations to extract the resistance force using semi-analytical methods and numerical modeling were carried out. Free surface numerical analysis of vessel in designed draft using finite volume method and double phase were evaluated and verified by experimental tests. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fast%20vessel" title="fast vessel">fast vessel</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrostatic%20and%20hydrodynamic%20optimization" title=" hydrostatic and hydrodynamic optimization"> hydrostatic and hydrodynamic optimization</a>, <a href="https://publications.waset.org/abstracts/search?q=free%20surface%20flow" title=" free surface flow"> free surface flow</a>, <a href="https://publications.waset.org/abstracts/search?q=computational%20fluid%20dynamics" title=" computational fluid dynamics"> computational fluid dynamics</a> </p> <a href="https://publications.waset.org/abstracts/4998/hydrodynamic-behavior-study-of-fast-mono-hull-and-catamaran-vessels-in-calm-waters-using-free-surface-flow-analysis" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/4998.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">516</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">6884</span> An Improvement of Flow Forming Process for Pressure Vessels by Four Rollers Machine</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=P.%20Sawitri">P. Sawitri</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Cdr.%20Sittha"> S. Cdr. Sittha</a>, <a href="https://publications.waset.org/abstracts/search?q=T.%20Kritsana"> T. Kritsana</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Flow forming is widely used in many industries, especially in defence technology industries. Pressure vessels requirements are high precision, light weight, seamless and optimum strength. For large pressure vessels, flow forming by 3 rollers machine were used. In case of long range rocket motor case flow forming and welding of pressure vessels have been used for manufacturing. Due to complication of welding process, researchers had developed 4 meters length pressure vessels without weldment by 4 rollers flow forming machine. Design and preparation of preform work pieces are performed. The optimization of flow forming parameter such as feed rate, spindle speed and depth of cut will be discussed. The experimental result shown relation of flow forming parameters to quality of flow formed tube and prototype pressure vessels have been made. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=flow%20forming" title="flow forming">flow forming</a>, <a href="https://publications.waset.org/abstracts/search?q=pressure%20vessel" title=" pressure vessel"> pressure vessel</a>, <a href="https://publications.waset.org/abstracts/search?q=four%20rollers" title=" four rollers"> four rollers</a>, <a href="https://publications.waset.org/abstracts/search?q=feed%20rate" title=" feed rate"> feed rate</a>, <a href="https://publications.waset.org/abstracts/search?q=spindle%20speed" title=" spindle speed"> spindle speed</a>, <a href="https://publications.waset.org/abstracts/search?q=cold%20work" title=" cold work"> cold work</a> </p> <a href="https://publications.waset.org/abstracts/14068/an-improvement-of-flow-forming-process-for-pressure-vessels-by-four-rollers-machine" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/14068.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">331</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">6883</span> Pattern of Blood Vessels Development at First Seven Days of Incubation of the Wild Helmeted Guinea Fowl (Numida meleagris galeata). Gross Approach</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nathaniel%20Wanmi">Nathaniel Wanmi</a>, <a href="https://publications.waset.org/abstracts/search?q=O.%20M.%20Samuel"> O. M. Samuel</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20Plang"> N. Plang</a>, <a href="https://publications.waset.org/abstracts/search?q=P.%20O.%20Brenda"> P. O. Brenda</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The wild helmeted guinea fowl has in recent time been used for research in the field of anatomy because of its peculiarity from other domesticated species of avian. Eggs of the wild helmeted guinea fowl are considered to be nutritious and has been used for medicinal purposes in some rural settlements in Nigeria. Eggs of the wild helmeted guinea fowl were purchased from hunters and taken to the National Veterinary Research Institution (NVRI) for incubation. Immediately fresh eggs were purchased, it was kindle using high powered light because of its thick egg shell and only eggs which have not started developing will be incubated and that marks the first day of incubation. On day 3 of incubation, large patches of appears redden on the surface of the egg yolk. These congested sites, develop around portion were future embryo will formed. Blood vessel were first, observed on day 4 of incubation and as days on, as embryo increases in size, blood vessels increase as well. The point of embryo implantation is evident first; by formation of congested areas and most importantly, a single zone of circular red rim. This mark the point of implantation. Blood vessels of the wild helmeted guinea fowl develops from the surface of the egg yolk, which appears initially as small strips of line. Blood vessels connects to the site of embryo implantation on day 3 of incubation. Blood vessel is the first structure to be form prior to the manifestation of the embryo. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=brain" title="brain">brain</a>, <a href="https://publications.waset.org/abstracts/search?q=development" title=" development"> development</a>, <a href="https://publications.waset.org/abstracts/search?q=helmeted" title=" helmeted"> helmeted</a>, <a href="https://publications.waset.org/abstracts/search?q=incubation" title=" incubation"> incubation</a> </p> <a href="https://publications.waset.org/abstracts/161480/pattern-of-blood-vessels-development-at-first-seven-days-of-incubation-of-the-wild-helmeted-guinea-fowl-numida-meleagris-galeata-gross-approach" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/161480.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">96</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">6882</span> Resistance Analysis for a Trimaran</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=C.%20M.%20De%20Marco%20Muscat-Fenech">C. M. De Marco Muscat-Fenech</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20M.%20Grech%20La%20Rosa"> A. M. Grech La Rosa</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Importance has been given to resistance analysis for various types of vessels; however explicit guidelines applied to multihull vessels have not been clearly defined. The purpose of this investigation is to highlight the importance of the vessel’s layout in terms of three axes positioning, the transverse (separation), the longitudinal (stagger) and the vertical (draught) with respect to resistance analysis. A vessel has the potential to experience less resistance, at a particular range of speeds, for a vast selection of hull positioning. Many potential layouts create opportunities of various design for both the commercial and leisure market. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=multihull" title="multihull">multihull</a>, <a href="https://publications.waset.org/abstracts/search?q=reistance" title=" reistance"> reistance</a>, <a href="https://publications.waset.org/abstracts/search?q=trimaran" title=" trimaran"> trimaran</a>, <a href="https://publications.waset.org/abstracts/search?q=vessels" title=" vessels "> vessels </a> </p> <a href="https://publications.waset.org/abstracts/1878/resistance-analysis-for-a-trimaran" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/1878.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">477</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">6881</span> Possibilities of Postmortem CT to Detection of Gas Accumulations in the Vessels of Dead Newborns with Congenital Sepsis</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Uliana%20N.%20Tumanova">Uliana N. Tumanova</a>, <a href="https://publications.waset.org/abstracts/search?q=Viacheslav%20M.%20Lyapin"> Viacheslav M. Lyapin</a>, <a href="https://publications.waset.org/abstracts/search?q=Vladimir%20G.%20Bychenko"> Vladimir G. Bychenko</a>, <a href="https://publications.waset.org/abstracts/search?q=Alexandr%20I.%20Shchegolev"> Alexandr I. Shchegolev</a>, <a href="https://publications.waset.org/abstracts/search?q=Gennady%20T.%20Sukhikh"> Gennady T. Sukhikh</a> </p> <p class="card-text"><strong>Abstract:</strong></p> It is well known that the gas formed as a result of postmortem decomposition of tissues can be detected already 24-48 hours after death. In addition, the conditions of keeping and storage of the corpse (temperature and humidity of the environment) significantly determine the rate of occurrence and development of posthumous changes. The presence of sepsis is accompanied by faster postmortem decomposition and decay of the organs and tissues of the body. The presence of gas in the vessels and cavities can be revealed fully at postmortem CT. Radiologists must certainly report on the detection of intraorganic or intravascular gas, wich was detected at postmortem CT, to forensic experts or pathologists before the autopsy. This gas can not be detected during autopsy, but it can be very important for establishing a diagnosis. To explore the possibility of postmortem CT for the evaluation of gas accumulations in the newborns' vessels, who died from congenital sepsis. Researched of 44 newborns bodies (25 male and 19 female sex, at the age from 6 hours to 27 days) after 6 - 12 hours of death. The bodies were stored in the refrigerator at a temperature of +4°C in the supine position. Grouped 12 bodies of newborns that died from congenital sepsis. The control group consisted of 32 bodies of newborns that died without signs of sepsis. Postmortem CT examination was performed at the GEMINI TF TOF16 device, before the autopsy. The localizations of gas accumulations in the vessels were determined on the CT tomograms. The sepsis diagnosis was on the basis of clinical and laboratory data and autopsy results. Gases in the vessels were detected in 33.3% of cases in the group with sepsis, and in the control group - in 34.4%. A group with sepsis most often the gas localized in the heart and liver vessels - 50% each, of observations number with the detected gas in the vessels. In the heart cavities, aorta and mesenteric vessels - 25% each. In control most often gas was detected in the liver (63.6%) and abdominal cavity (54.5%) vessels. In 45.5% the gas localized in the cavities, and in 36.4% in the vessels of the heart. In the cerebral vessels and in the aorta gas was detected in 27.3% and 9.1%, respectively. Postmortem CT has high diagnostic capabilities to detect free gas in vessels. Postmortem changes in newborns that died from sepsis do not affect intravascular gas production within 6-12 hours. Radiation methods should be used as a supplement to the autopsy, including as a kind of ‘guide’, with the indication to the forensic medical expert of certain changes identified during CT studies, for better definition of pathological processes during the autopsy. Postmortem CT can be recommend as a first stage of autopsy. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=congenital%20sepsis" title="congenital sepsis">congenital sepsis</a>, <a href="https://publications.waset.org/abstracts/search?q=gas" title=" gas"> gas</a>, <a href="https://publications.waset.org/abstracts/search?q=newborn" title=" newborn"> newborn</a>, <a href="https://publications.waset.org/abstracts/search?q=postmortem%20CT" title=" postmortem CT"> postmortem CT</a> </p> <a href="https://publications.waset.org/abstracts/97758/possibilities-of-postmortem-ct-to-detection-of-gas-accumulations-in-the-vessels-of-dead-newborns-with-congenital-sepsis" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/97758.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">146</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">6880</span> Pathways and Mechanisms of Lymphocytes Emigration from Newborn Thymus</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Olena%20Grygorieva">Olena Grygorieva</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Nowadays mechanisms of thymocytes emigration from the thymus to the periphery are investigated actively. We have proposed a hypothesis of thymocytes’ migration from the thymus through lymphatic vessels during periodical short-term local edema. By morphological, hystochemical methods we have examined quantity of lymphocytes, epitelioreticulocytes, mast cells, blood and lymphatic vessels in morpho-functional areas of rats’ thymuses during the first week after birth in 4 hours interval. In newborn and beginning from 8 hour after birth every 12 hours specific density of the thymus, absolute quantity of microcirculatory vessels, especially of lymphatic ones, lymphcyte-epithelial index, quantity of mast cells and their degranulative forms increase. Structure of extracellular matrix, intrathymical microenvironment and lymphocytes’ adhesive properties change. Absolute quantity of small lymphocytes in thymic cortex changes wavy. All these changes are straightly expressed from 0 till 2, from 12 till 16, from 108 till 120 hours of postnatal life. During this periods paravasal lymphatic vessels are stuffed with lymphocytes, i.e. discrete migration of lymphocytes from the thymus occurs. After rapid edema reduction, quantity of lymphatic vessels decrease, they become empty. Therefore, in the thymus of newborn periodical short-term local edema is observed, on its top discrete migration of lymphocytes from the thymus occurs. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=lymphocytes" title="lymphocytes">lymphocytes</a>, <a href="https://publications.waset.org/abstracts/search?q=lymphatic%20vessels" title=" lymphatic vessels"> lymphatic vessels</a>, <a href="https://publications.waset.org/abstracts/search?q=mast%20cells" title=" mast cells"> mast cells</a>, <a href="https://publications.waset.org/abstracts/search?q=thymus" title=" thymus"> thymus</a> </p> <a href="https://publications.waset.org/abstracts/41730/pathways-and-mechanisms-of-lymphocytes-emigration-from-newborn-thymus" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/41730.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">225</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">6879</span> A Simple, Precise and Cost Effective PTFE Container Design Capable to Work in Domestic Microwave Oven</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mehrdad%20Gholami">Mehrdad Gholami</a>, <a href="https://publications.waset.org/abstracts/search?q=Shima%20Behkami"> Shima Behkami</a>, <a href="https://publications.waset.org/abstracts/search?q=Sharifuddin%20B.%20Md.%20Zain"> Sharifuddin B. Md. Zain</a>, <a href="https://publications.waset.org/abstracts/search?q=Firdaus%20A.%20B.%20Kamaruddin"> Firdaus A. B. Kamaruddin</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Starting from the first application of a microwave oven for sample preparation in 1975 for the purpose of wet ashing of biological samples using a domestic microwave oven, many microwave-assisted dissolution vessels have been developed. The advanced vessels are armed with special safety valve that release the excess of pressure while the vessels are in critical conditions due to applying high power of microwave. Nevertheless, this releasing of pressure may cause lose of volatile elements. In this study Teflon bottles are designed with relatively thicker wall compared to commercial ones and a silicone based polymer was used to prepare an O-ring which plays the role of safety valve. In this design, eight vessels are located in an ABS holder to keep them stable and safe. The advantage of these vessels is that they need only 2 mL of HNO3 and 1mL H2O2 to digest different environmental samples, namely, sludge, apple leave, peach leave, spinach leave and tomato leave. In order to investigate the performance of this design an ICP-MS instrument was applied for multi elemental analysis of 20 elements on the SRM of above environmental samples both using this design and a commercial microwave digestion design. Very comparable recoveries were obtained from this simple design with the commercial one. Considering the price of ultrapure chemicals and the amount of them which normally is about 8-10 mL, these simple vessels with the procedures that will be discussed in detail are very cost effective and very suitable for environmental studies. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=inductively%20coupled%20plasma%20mass%20spectroscopy%20%28ICP-MS%29" title="inductively coupled plasma mass spectroscopy (ICP-MS)">inductively coupled plasma mass spectroscopy (ICP-MS)</a>, <a href="https://publications.waset.org/abstracts/search?q=PTFE%20vessels" title=" PTFE vessels"> PTFE vessels</a>, <a href="https://publications.waset.org/abstracts/search?q=Teflon%20bombs" title=" Teflon bombs"> Teflon bombs</a>, <a href="https://publications.waset.org/abstracts/search?q=microwave%20digestion" title=" microwave digestion"> microwave digestion</a>, <a href="https://publications.waset.org/abstracts/search?q=trace%20element" title=" trace element"> trace element</a> </p> <a href="https://publications.waset.org/abstracts/10305/a-simple-precise-and-cost-effective-ptfe-container-design-capable-to-work-in-domestic-microwave-oven" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/10305.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">341</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">6878</span> Dynamic Damage Analysis of Carbon Fiber Reinforced Polymer Composite Confinement Vessels</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Kamal%20Hammad">Kamal Hammad</a>, <a href="https://publications.waset.org/abstracts/search?q=Alexey%20Fedorenko"> Alexey Fedorenko</a>, <a href="https://publications.waset.org/abstracts/search?q=Ivan%20Sergeichev"> Ivan Sergeichev</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study uses analytical modeling, experimental testing, and explicit numerical simulations to evaluate failure and spall damage in Carbon Fiber-Reinforced Polymer (CFRP) composite confinement vessels. It investigates the response of composite materials to explosive loading dynamic impact, revealing varied failure modes. Hashin damage was used to model inplane failure, while the Virtual Crack Closure Technique (VCCT) modeled inter-laminar damage. Results show moderate agreement between simulations and experiments regarding free surface velocity and failure stresses, with discrepancies due to wire alignment imperfections and wave reverberations in the experimental test. The findings can improve design and risk-reduction strategies in high-risk scenarios, leading to enhanced safety and economic efficiency in material assessment and structural design processes. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=explicit" title="explicit">explicit</a>, <a href="https://publications.waset.org/abstracts/search?q=numerical" title=" numerical"> numerical</a>, <a href="https://publications.waset.org/abstracts/search?q=spall" title=" spall"> spall</a>, <a href="https://publications.waset.org/abstracts/search?q=damage" title=" damage"> damage</a>, <a href="https://publications.waset.org/abstracts/search?q=CFRP" title=" CFRP"> CFRP</a>, <a href="https://publications.waset.org/abstracts/search?q=composite" title=" composite"> composite</a>, <a href="https://publications.waset.org/abstracts/search?q=vessels" title=" vessels"> vessels</a>, <a href="https://publications.waset.org/abstracts/search?q=explosive" title=" explosive"> explosive</a>, <a href="https://publications.waset.org/abstracts/search?q=dynamic" title=" dynamic"> dynamic</a>, <a href="https://publications.waset.org/abstracts/search?q=impact" title=" impact"> impact</a>, <a href="https://publications.waset.org/abstracts/search?q=Hashin" title=" Hashin"> Hashin</a>, <a href="https://publications.waset.org/abstracts/search?q=VCCT" title=" VCCT"> VCCT</a> </p> <a href="https://publications.waset.org/abstracts/186985/dynamic-damage-analysis-of-carbon-fiber-reinforced-polymer-composite-confinement-vessels" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/186985.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">51</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">6877</span> Study of Pottery And Glazed Canopic Vessels</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Abdelrahman%20Mohamed">Abdelrahman Mohamed</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The ancient Egyptians used canopic vessels in embalming operations in order to preserve the guts of the mummified corpse. Canopic vessels were made of many materials, including pottery and glazed pottery. In this research, we study a pottery canopic vessel and a glazed pottery vessel. An analysis to find out the compounds and elements of the materials from which the container is made and the colors, and also to make some analysis for the organic materials present inside it, such as the Fourier Transform Infrared Spectroscopy analysis and the Gas chromatograph mass spectrometers analysis of the organic residue. Through the study and analysis, it was proved that some of the materials present in the pot were coniferous oil and animal fats. In the other pot, the analysis showed the presence of some plant resins (mastic) inside rolls of linen. Restoration operations were carried out, such as mechanical cleaning, strengthening, and completing the reinforcement of the pots. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=canopic%20jar" title="canopic jar">canopic jar</a>, <a href="https://publications.waset.org/abstracts/search?q=embalming" title=" embalming"> embalming</a>, <a href="https://publications.waset.org/abstracts/search?q=FTIR" title=" FTIR"> FTIR</a>, <a href="https://publications.waset.org/abstracts/search?q=GCMS" title=" GCMS"> GCMS</a>, <a href="https://publications.waset.org/abstracts/search?q=linen." title=" linen."> linen.</a> </p> <a href="https://publications.waset.org/abstracts/164726/study-of-pottery-and-glazed-canopic-vessels" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/164726.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">84</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">6876</span> J-Integral Method for Assessment of Structural Integrity of a Pressure Vessel</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Karthik%20K.%20R">Karthik K. R</a>, <a href="https://publications.waset.org/abstracts/search?q=Viswanath%20V"> Viswanath V</a>, <a href="https://publications.waset.org/abstracts/search?q=Asraff%20A.%20K"> Asraff A. K</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The first stage of a new-generation launch vehicle of ISRO makes use of large pressure vessels made of Aluminium alloy AA2219 to store fuel and oxidizer. These vessels have many weld joints that may contain cracks or crack-like defects during their fabrication. These defects may propagate across the vessel during pressure testing or while in service under the influence of tensile stresses leading to catastrophe. Though ductile materials exhibit significant stable crack growth prior to failure, it is not generally acceptable for an aerospace component. There is a need to predict the initiation of stable crack growth. The structural integrity of the vessel from fracture considerations can be studied by constructing the Failure Assessment Diagram (FAD) that accounts for both brittle fracture and plastic collapse. Critical crack sizes of the pressure vessel may be highly conservative if it is predicted from FAD alone. If the J-R curve for material under consideration is available apriori, the critical crack sizes can be predicted to a certain degree of accuracy. In this paper, a novel approach is proposed to predict the integrity of a weld in a pressure vessel made of AA2219 material. Fracture parameter ‘J-integral’ at the crack front, evaluated through finite element analyses, is used in the new procedure. Based on the simulation of tension tests carried out on SCT specimens by NASA, a cut-off value of J-integral value (J?ᵤₜ_ₒ??) is finalised. For the pressure vessel, J-integral at the crack front is evaluated through FE simulations incorporating different surface cracks at long seam weld in a cylinder and in dome petal welds. The obtained J-integral, at vessel level, is compared with a value of J?ᵤₜ_ₒ??, and the integrity of vessel weld in the presence of the surface crack is firmed up. The advantage of this methodology is that if SCT test data of any metal is available, the critical crack size in hardware fabricated using that material can be predicted to a better level of accuracy. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=FAD" title="FAD">FAD</a>, <a href="https://publications.waset.org/abstracts/search?q=j-integral" title=" j-integral"> j-integral</a>, <a href="https://publications.waset.org/abstracts/search?q=fracture" title=" fracture"> fracture</a>, <a href="https://publications.waset.org/abstracts/search?q=surface%20crack" title=" surface crack"> surface crack</a> </p> <a href="https://publications.waset.org/abstracts/138426/j-integral-method-for-assessment-of-structural-integrity-of-a-pressure-vessel" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/138426.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">187</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">6875</span> Novel Algorithm for Restoration of Retina Images </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=P.%20Subbuthai">P. Subbuthai</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Muruganand"> S. Muruganand</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Diabetic Retinopathy is one of the complicated diseases and it is caused by the changes in the blood vessels of the retina. Extraction of retina image through Fundus camera sometimes produced poor contrast and noises. Because of this noise, detection of blood vessels in the retina is very complicated. So preprocessing is needed, in this paper, a novel algorithm is implemented to remove the noisy pixel in the retina image. The proposed algorithm is Extended Median Filter and it is applied to the green channel of the retina because green channel vessels are brighter than the background. Proposed extended median filter is compared with the existing standard median filter by performance metrics such as PSNR, MSE and RMSE. Experimental results show that the proposed Extended Median Filter algorithm gives a better result than the existing standard median filter in terms of noise suppression and detail preservation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fundus%20retina%20image" title="fundus retina image">fundus retina image</a>, <a href="https://publications.waset.org/abstracts/search?q=diabetic%20retinopathy" title=" diabetic retinopathy"> diabetic retinopathy</a>, <a href="https://publications.waset.org/abstracts/search?q=median%20filter" title=" median filter"> median filter</a>, <a href="https://publications.waset.org/abstracts/search?q=microaneurysms" title=" microaneurysms"> microaneurysms</a>, <a href="https://publications.waset.org/abstracts/search?q=exudates" title=" exudates"> exudates</a> </p> <a href="https://publications.waset.org/abstracts/20819/novel-algorithm-for-restoration-of-retina-images" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/20819.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">342</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">6874</span> Enhanced Iceberg Information Dissemination for Public and Autonomous Maritime Use</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ronald%20Mraz">Ronald Mraz</a>, <a href="https://publications.waset.org/abstracts/search?q=Gary%20C.%20Kessler"> Gary C. Kessler</a>, <a href="https://publications.waset.org/abstracts/search?q=Ethan%20Gold"> Ethan Gold</a>, <a href="https://publications.waset.org/abstracts/search?q=John%20G.%20Cline"> John G. Cline</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The International Ice Patrol (IIP) continually monitors iceberg activity in the North Atlantic by direct observation using ships, aircraft, and satellite imagery. Daily reports detailing navigational boundaries of icebergs have significantly reduced the risk of iceberg contact. What is currently lacking is formatting this data for automatic transmission and display of iceberg navigational boundaries in commercial navigation equipment. This paper describes the methodology and implementation of a system to format iceberg limit information for dissemination through existing radio network communications. This information will then automatically display on commercial navigation equipment. Additionally, this information is reformatted for Google Earth rendering of iceberg track line limits. Having iceberg limit information automatically available in standard navigation equipment will help support full autonomous operation of sailing vessels. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=iceberg" title="iceberg">iceberg</a>, <a href="https://publications.waset.org/abstracts/search?q=iceberg%20risk" title=" iceberg risk"> iceberg risk</a>, <a href="https://publications.waset.org/abstracts/search?q=iceberg%20track%20lines" title=" iceberg track lines"> iceberg track lines</a>, <a href="https://publications.waset.org/abstracts/search?q=AIS%20messaging" title=" AIS messaging"> AIS messaging</a>, <a href="https://publications.waset.org/abstracts/search?q=international%20ice%20patrol" title=" international ice patrol"> international ice patrol</a>, <a href="https://publications.waset.org/abstracts/search?q=North%20American%20ice%20service" title=" North American ice service"> North American ice service</a>, <a href="https://publications.waset.org/abstracts/search?q=google%20earth" title=" google earth"> google earth</a>, <a href="https://publications.waset.org/abstracts/search?q=autonomous%20surface%20vessels" title=" autonomous surface vessels"> autonomous surface vessels</a> </p> <a href="https://publications.waset.org/abstracts/125523/enhanced-iceberg-information-dissemination-for-public-and-autonomous-maritime-use" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/125523.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">136</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">6873</span> Application of Strength Criteria for Cellular Pressure Vessels</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Antanas%20%C5%BDiliukas">Antanas Žiliukas</a>, <a href="https://publications.waset.org/abstracts/search?q=Mindaugas%20Kukis"> Mindaugas Kukis</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The work deals with cellular pressure vessels subjected to internal pressure. Their cellular insert can be used for placing liquids or gases, which is necessary to carry out technological processes, and the vessel itself has a good bearing capacity. Numerical calculations of the three core structures, which measure the influence of the inner cylinder thickness on maximum bearing capacity are presented. The calculations are compared using strength criteria and they show the different strength safety level. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=pressure" title="pressure">pressure</a>, <a href="https://publications.waset.org/abstracts/search?q=strength%20criterion" title=" strength criterion"> strength criterion</a>, <a href="https://publications.waset.org/abstracts/search?q=sandwich%20plate" title=" sandwich plate"> sandwich plate</a>, <a href="https://publications.waset.org/abstracts/search?q=cellular%20vessel" title=" cellular vessel"> cellular vessel</a> </p> <a href="https://publications.waset.org/abstracts/6763/application-of-strength-criteria-for-cellular-pressure-vessels" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/6763.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">309</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">6872</span> High-Production Laser and Plasma Welding Technologies for High-Speed Vessels Production</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=V.%20M.%20Levshakov">V. M. Levshakov</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20A.%20Steshenkova"> N. A. Steshenkova</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20A.%20Nosyrev"> N. A. Nosyrev</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Application of hulls processing technologies, based on high-concentrated energy sources (laser and plasma technologies), allow improve shipbuilding production. It is typical for high-speed vessels construction using steel and aluminum alloys with high precision hulls required. Report describes high-performance technologies for plasma welding (using direct current of reversed polarity), laser, and hybrid laser-arc welding of hulls structures developed by JSC “SSTC”. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=flat%20sections" title="flat sections">flat sections</a>, <a href="https://publications.waset.org/abstracts/search?q=hybrid%20laser-arc%20welding" title=" hybrid laser-arc welding"> hybrid laser-arc welding</a>, <a href="https://publications.waset.org/abstracts/search?q=plasma%20welding" title=" plasma welding"> plasma welding</a>, <a href="https://publications.waset.org/abstracts/search?q=plasmatron" title=" plasmatron"> plasmatron</a> </p> <a href="https://publications.waset.org/abstracts/8894/high-production-laser-and-plasma-welding-technologies-for-high-speed-vessels-production" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/8894.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">448</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">6871</span> The Urgency of Berth Deepening at the Port of Durban </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Rowen%20Naicker">Rowen Naicker</a>, <a href="https://publications.waset.org/abstracts/search?q=Dhiren%20Allopi"> Dhiren Allopi </a> </p> <p class="card-text"><strong>Abstract:</strong></p> One of the major problems the Port of Durban is experiencing is addressing shallow spots aggravated by megaships that berth. In the recent years, the vessels that call at the Port have increased in size which calls for draughts that are much deeper. For this reason, these larger vessels can only berth under high tide to avoid the risk of running aground. In addition to this, the ships cannot sail in fully laden which does not make it feasible for ship owners. Further during the berthing materials are displaced from the seabed which result in shallow spots being developed. The permitted draft (under-keel allowance) for the Durban Container Terminal (DCT) is currently 12.2 m. Transnet National Ports Authority (TNPA) are currently investing in a dredging fleet worth almost two billion rand. One of the highlights of this investment would be the building of grab hopper dredger that would be dedicated to the Port by 2017. TNPA are trying various techniques to dissolve the reduction of draughts by implementing dredging maintenance projects but is this sufficient? The ideal resolution would be the deepening and widening of the berths. Plans for this project is in place, but the implementation process is a matter of urgency. The intention of this project will be to accommodate three big vessels rather than two which in turn will improve the turnaround time in the port. The berthing will then no longer depend on high tide to avoid ships running aground. The aim of this paper is to prove the implementation of deepening and widening of the Port of Durban is a matter of urgency. If the plan to deepen and widen the berths at DCT is delayed it will mean a loss of business for the South African economy. If larger vessels cannot be accommodated in the Port of Durban, it will bypass the busiest container handling facility in the Southern hemisphere. Shipping companies are compelled to use larger ships as opposed to smaller vessels to lower port and fuel costs. A delay in the expansion of DCT could also result in an escalation of costs. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=DCT" title="DCT">DCT</a>, <a href="https://publications.waset.org/abstracts/search?q=deepening" title=" deepening"> deepening</a>, <a href="https://publications.waset.org/abstracts/search?q=berth" title=" berth"> berth</a>, <a href="https://publications.waset.org/abstracts/search?q=port" title=" port"> port</a> </p> <a href="https://publications.waset.org/abstracts/54171/the-urgency-of-berth-deepening-at-the-port-of-durban" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/54171.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">400</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">6870</span> Collision Avoidance Maneuvers for Vessels Navigating through Traffic Separation Scheme</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Aswin%20V.%20J.">Aswin V. J.</a>, <a href="https://publications.waset.org/abstracts/search?q=Sreeja%20%20S."> Sreeja S.</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20Harikumar"> R. Harikumar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Ship collision is one of the major concerns while navigating in the ocean. In congested sea routes where there are hectic offshore operations, ships are often forced to take close encounter maneuvers. Maritime rules for preventing collision at sea are defined in the International Regulations for Preventing Collision at Sea. Traffic Separation Schemes (TSS) are traffic management route systems ruled by International Maritime Organization (IMO), where the traffic lanes indicate the general direction of traffic flow. The Rule 10 of International Regulations for Preventing Collision at Sea prescribes the conduct of vessels while navigating through TSS. But no quantitative criteria regarding the procedures to detect and evaluate collision risk is specified in International Regulations for Preventing Collision at Sea. Most of the accidents that occur are due to operational errors affected by human factors such as lack of experience and loss of situational awareness. In open waters, the traffic density is less when compared to that in TSS, and hence the vessels can be operated in autopilot mode. A collision avoidance method that uses the possible obstacle trajectories in advance to predict “collision occurrence” and can generate suitable maneuvers for collision avoidance is presented in this paper. The suitable course and propulsion changes that can be used in a TSS considering International Regulations for Preventing Collision at Sea are found out for various obstacle scenarios. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=collision%20avoidance" title="collision avoidance">collision avoidance</a>, <a href="https://publications.waset.org/abstracts/search?q=maneuvers" title=" maneuvers"> maneuvers</a>, <a href="https://publications.waset.org/abstracts/search?q=obstacle%20trajectories" title=" obstacle trajectories"> obstacle trajectories</a>, <a href="https://publications.waset.org/abstracts/search?q=traffic%20separation%20scheme" title=" traffic separation scheme"> traffic separation scheme</a> </p> <a href="https://publications.waset.org/abstracts/145379/collision-avoidance-maneuvers-for-vessels-navigating-through-traffic-separation-scheme" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/145379.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">77</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">6869</span> Injection of Bradykinin in Femoral Artery Elicits Cardiorespiratory Reflexes Involving Perivascular Afferents in Rat Models</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sanjeev%20K.%20Singh">Sanjeev K. Singh</a>, <a href="https://publications.waset.org/abstracts/search?q=Maloy%20B.%20Mandal"> Maloy B. Mandal</a>, <a href="https://publications.waset.org/abstracts/search?q=Revand%20R."> Revand R.</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The physiology of baroreceptors and chemoreceptors present in large blood vessels of the heart is well known in regulation of cardiorespiratory functions. Since large blood vessels and peripheral blood vessels are of same mesodermal origin, therefore, involvement of the latter in regulation of cardiorespiratory system is expected. Role of perivascular nerves in mediating cardiorespiratory alterations produced after intra-arterial injection of a nociceptive agent (bradykinin) was examined in urethane anesthetized male rats. Respiratory frequency, blood pressure, and heart rate were recorded for 30 min after the retrograde injection of bradykinin/saline in the femoral artery. In addition, paw edema was determined and water content was expressed as percentage of wet weight. Injection of bradykinin produced immediate tachypnoeic, hypotensive and bradycardiac responses of shorter latency (5-8 s) favoring the neural mechanisms involved in it. Injection of equi-volume of saline did not produce any responses and served as time matched control. Paw edema was observed in the ipsilateral hind limb. Pretreatment with diclofenac sodium significantly attenuated the bradykinin-induced responses and also blocked the paw edema. Ipsilateral femoral and sciatic nerve sectioning attenuated bradykinin-induced responses significantly indicating the origin of responses from the local vascular bed. Administration of bradykinin in the segment of an artery produced reflex cardiorespiratory changes by stimulating the perivascular nociceptors involving prostaglandins. This is a novel study exhibiting the role of peripheral blood vessels in regulation of cardiorespiratory system. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=vasosensory%20reflex" title="vasosensory reflex">vasosensory reflex</a>, <a href="https://publications.waset.org/abstracts/search?q=cardiorespiratory%20changes" title=" cardiorespiratory changes"> cardiorespiratory changes</a>, <a href="https://publications.waset.org/abstracts/search?q=nociceptive%20agent" title=" nociceptive agent"> nociceptive agent</a>, <a href="https://publications.waset.org/abstracts/search?q=bradykinin" title=" bradykinin"> bradykinin</a>, <a href="https://publications.waset.org/abstracts/search?q=VR1%20receptors" title=" VR1 receptors"> VR1 receptors</a> </p> <a href="https://publications.waset.org/abstracts/154000/injection-of-bradykinin-in-femoral-artery-elicits-cardiorespiratory-reflexes-involving-perivascular-afferents-in-rat-models" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/154000.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">148</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">6868</span> Effects of Surface Topography on Roughness of Glazed Ceramic Substrates</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=R.%20Sarjahani">R. Sarjahani</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Sheikhattar"> M. Sheikhattar</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Javadpour"> S. Javadpour</a>, <a href="https://publications.waset.org/abstracts/search?q=B.%20Hashemi"> B. Hashemi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Glazes and their surface characterization is an important subject for ceramic industries. Fabrication of a super smooth surface resistant to stains is a big improvement for those industries. In this investigation, surface topography of popular glazes such as Zircon and Titania based opaque glazes, calcium based matte glaze and transparent glaze has been analyzed by Marsurf M300, SEM, EDS and XRD. Results shows that surface roughness of glazes seriously depends on surface crystallinity, crystal size and shapes. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=crystallinity" title="crystallinity">crystallinity</a>, <a href="https://publications.waset.org/abstracts/search?q=glaze" title=" glaze"> glaze</a>, <a href="https://publications.waset.org/abstracts/search?q=surface%20roughness" title=" surface roughness"> surface roughness</a>, <a href="https://publications.waset.org/abstracts/search?q=topography" title=" topography"> topography</a> </p> <a href="https://publications.waset.org/abstracts/23918/effects-of-surface-topography-on-roughness-of-glazed-ceramic-substrates" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/23918.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">567</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">6867</span> Anatomical Adaptations and Mineral Elements Allocation Associated with the Zn Phytostabilization Capability of Acanthus ilicifolius L.</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Shackira%20Am">Shackira Am</a>, <a href="https://publications.waset.org/abstracts/search?q=Jos%20T.%20Puthur"> Jos T. Puthur</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The phytostabilization potential of a halophyte Acanthus ilicifolius L. has been evaluated with special attention to the nutritional as well as anatomical adaptations developed by the plant. Distribution of essential elements influenced by the excess Zn²⁺ ions in the root tissue was studied by FEG-SEM EDX microanalysis. Significant variations were observed in the uptake and allocation of mineral elements like Mg, P, K, S, Na, Si and Al in the root of A. ilicifolius. The increase in S is in correlation with the increased synthesis of glutathione which might be involved in the biosynthesis of phytochelatins. This in turn might be aiding the plant to tolerate the adverse environmental conditions by stabilizing the excess Zn in the root tissue itself. Moreover it is revealed that most of the Zn were accumulated towards the central region near the vascular tissue. Treatment with ZnSO₄ in A. ilicifolius caused significant increase in the number of glandular trichomes on the adaxial leaf surface as compared to the leaves of control plants. In addition to this, A. ilicifolius when treated with ZnSO₄, exhibited a deeply stained layer of cells immediate to the endodermis, forming more or less a ring like structure around the xylem vessels. Phloem cells in these plants were crushed/reduced in numbers. There were no such deeply stained cells forming a ring around the xylem vessels in the control plants. These adaptive responses make the plant a suitable candidate for the phytostabilization of Zn. In addition the nutritional adjustment of the plant equips them for a better survival under increased concentration of Zn²⁺. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Acanthus%20ilicifolius" title="Acanthus ilicifolius">Acanthus ilicifolius</a>, <a href="https://publications.waset.org/abstracts/search?q=mineral%20elements" title=" mineral elements"> mineral elements</a>, <a href="https://publications.waset.org/abstracts/search?q=phytostabilization" title=" phytostabilization"> phytostabilization</a>, <a href="https://publications.waset.org/abstracts/search?q=zinc" title=" zinc"> zinc</a> </p> <a href="https://publications.waset.org/abstracts/103007/anatomical-adaptations-and-mineral-elements-allocation-associated-with-the-zn-phytostabilization-capability-of-acanthus-ilicifolius-l" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/103007.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">168</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">6866</span> Morphology Operation and Discrete Wavelet Transform for Blood Vessels Segmentation in Retina Fundus</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Rita%20Magdalena">Rita Magdalena</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20K.%20Caecar%20Pratiwi"> N. K. Caecar Pratiwi</a>, <a href="https://publications.waset.org/abstracts/search?q=Yunendah%20Nur%20Fuadah"> Yunendah Nur Fuadah</a>, <a href="https://publications.waset.org/abstracts/search?q=Sofia%20Saidah"> Sofia Saidah</a>, <a href="https://publications.waset.org/abstracts/search?q=Bima%20Sakti"> Bima Sakti</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Vessel segmentation of retinal fundus is important for biomedical sciences in diagnosing ailments related to the eye. Segmentation can simplify medical experts in diagnosing retinal fundus image state. Therefore, in this study, we designed a software using MATLAB which enables the segmentation of the retinal blood vessels on retinal fundus images. There are two main steps in the process of segmentation. The first step is image preprocessing that aims to improve the quality of the image to be optimum segmented. The second step is the image segmentation in order to perform the extraction process to retrieve the retina’s blood vessel from the eye fundus image. The image segmentation methods that will be analyzed in this study are Morphology Operation, Discrete Wavelet Transform and combination of both. The amount of data that used in this project is 40 for the retinal image and 40 for manually segmentation image. After doing some testing scenarios, the average accuracy for Morphology Operation method is 88.46 % while for Discrete Wavelet Transform is 89.28 %. By combining the two methods mentioned in later, the average accuracy was increased to 89.53 %. The result of this study is an image processing system that can segment the blood vessels in retinal fundus with high accuracy and low computation time. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=discrete%20wavelet%20transform" title="discrete wavelet transform">discrete wavelet transform</a>, <a href="https://publications.waset.org/abstracts/search?q=fundus%20retina" title=" fundus retina"> fundus retina</a>, <a href="https://publications.waset.org/abstracts/search?q=morphology%20operation" title=" morphology operation"> morphology operation</a>, <a href="https://publications.waset.org/abstracts/search?q=segmentation" title=" segmentation"> segmentation</a>, <a href="https://publications.waset.org/abstracts/search?q=vessel" title=" vessel"> vessel</a> </p> <a href="https://publications.waset.org/abstracts/105620/morphology-operation-and-discrete-wavelet-transform-for-blood-vessels-segmentation-in-retina-fundus" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/105620.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">195</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">6865</span> Assessment of the Impact of Trawling Activities on Marine Bottoms of Moroccan Atlantic </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Rachida%20Houssa">Rachida Houssa</a>, <a href="https://publications.waset.org/abstracts/search?q=Hassan%20Rhinane"> Hassan Rhinane</a>, <a href="https://publications.waset.org/abstracts/search?q=Fadoumo%20Ali%20Malouw"> Fadoumo Ali Malouw</a>, <a href="https://publications.waset.org/abstracts/search?q=Amina%20Oulmaalem"> Amina Oulmaalem</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Since the early 70s, the Moroccan Atlantic sea was subjected to the pressure of the bottom trawling, one of the most destructive techniques seabed that cause havoc on fishing catch, nonselective, and responsible for more than half of all releases of fish around the world. The present paper aims to map and assess the impact of the activity of the bottom trawling of the Moroccan Atlantic coast. For this purpose, a dataset of thirty years, between 1962 and 1999, from foreign fishing vessels using bottom trawling, has been used and integrated in a GIS. To estimate the extent and the importance of the geographical distribution of the trawling effort, the Moroccan Atlantic area was divided into a grid of cells of 25 km2 (5x5 km). This grid was joined to the effort trawling data, creating a new entity with a table containing spatial overlay grid with the polygon of swept surfaces. This mapping model allowed to quantify the used fishing effort versus time and to generate the trace indicative of trawling efforts on the seabed. Indeed, for a given year, a grid cell may have a swept area equal to 0 (never been touched by the trawl) or 25 km2 (the trawled area is similar to the cell size) or may be 100 km2 indicating that for this year, the scanned surface is four times the cell area. The results show that the total cumulative sum of trawled area is approximately 28,738,326 km2, scattered throughout the Atlantic coast. 95% of the overall trawling effort is located in the southern zone, between 29°N and 20°30'N. Nearly 5% of the trawling effort is located in the northern coastal region, north of 33°N. The center area between 33°N and 29°N is the least swept by Russian commercial vessels because in this region the majority of the area is rocky, and non trawlable. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=GIS" title="GIS">GIS</a>, <a href="https://publications.waset.org/abstracts/search?q=Moroccan%20Atlantic%20Ocean" title=" Moroccan Atlantic Ocean"> Moroccan Atlantic Ocean</a>, <a href="https://publications.waset.org/abstracts/search?q=seabed" title=" seabed"> seabed</a>, <a href="https://publications.waset.org/abstracts/search?q=trawling" title=" trawling"> trawling</a> </p> <a href="https://publications.waset.org/abstracts/45380/assessment-of-the-impact-of-trawling-activities-on-marine-bottoms-of-moroccan-atlantic" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/45380.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">328</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">6864</span> Subsea Processing: Deepwater Operation and Production</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Md%20Imtiaz">Md Imtiaz</a>, <a href="https://publications.waset.org/abstracts/search?q=Sanchita%20Dei"> Sanchita Dei</a>, <a href="https://publications.waset.org/abstracts/search?q=Shubham%20Damke"> Shubham Damke</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In recent years, there has been a rapidly accelerating shift from traditional surface processing operations to subsea processing operation. This shift has been driven by a number of factors including the depletion of shallow fields around the world, technological advances in subsea processing equipment, the need for production from marginal fields, and lower initial upfront investment costs compared to traditional production facilities. Moving production facilities to the seafloor offers a number of advantage, including a reduction in field development costs, increased production rates from subsea wells, reduction in the need for chemical injection, minimization of risks to worker ,reduction in spills due to hurricane damage, and increased in oil production by enabling production from marginal fields. Subsea processing consists of a range of technologies for separation, pumping, compression that enables production from offshore well without the need for surface facilities. At present, there are two primary technologies being used for subsea processing: subsea multiphase pumping and subsea separation. Multiphase pumping is the most basic subsea processing technology. Multiphase pumping involves the use of boosting system to transport the multiphase mixture through pipelines to floating production vessels. The separation system is combined with single phase pumps or water would be removed and either pumped to the surface, re-injected, or discharged to the sea. Subsea processing can allow for an entire topside facility to be decommissioned and the processed fluids to be tied back to a new, more distant, host. This type of application reduces costs and increased both overall facility and integrity and recoverable reserve. In future, full subsea processing could be possible, thereby eliminating the need for surface facilities. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=FPSO" title="FPSO">FPSO</a>, <a href="https://publications.waset.org/abstracts/search?q=marginal%20field" title=" marginal field"> marginal field</a>, <a href="https://publications.waset.org/abstracts/search?q=Subsea%20processing" title=" Subsea processing"> Subsea processing</a>, <a href="https://publications.waset.org/abstracts/search?q=SWAG" title=" SWAG"> SWAG</a> </p> <a href="https://publications.waset.org/abstracts/33428/subsea-processing-deepwater-operation-and-production" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/33428.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">413</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">6863</span> NextCovps: Design and Stress Analysis of Dome Composite Overwrapped Pressure Vessels using Geodesic Trajectory Approach</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ammar%20Maziz">Ammar Maziz</a>, <a href="https://publications.waset.org/abstracts/search?q=Prateek%20Gupta"> Prateek Gupta</a>, <a href="https://publications.waset.org/abstracts/search?q=Thiago%20Vasconcellos%20Birro"> Thiago Vasconcellos Birro</a>, <a href="https://publications.waset.org/abstracts/search?q=Benoit%20Gely"> Benoit Gely</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Hydrogen as a sustainable fuel has the highest energy density per mass as compared to conventional non-renewable sources. As the world looks to move towards sustainability, especially in the sectors of aviation and automotive, it becomes important to address the issue of storage of hydrogen as compressed gas in high-pressure tanks. To improve the design for the efficient storage and transportation of Hydrogen, this paper presents the design and stress analysis of Dome Composite Overwrapped Pressure Vessels (COPVs) using the geodesic trajectory approach. The geodesic trajectory approach is used to optimize the dome design, resulting in a lightweight and efficient structure. Python scripting is employed to implement the mathematical modeling of the COPV, and after validating the model by comparison to the published paper, stress analysis is conducted using Abaqus commercial code. The results demonstrate the effectiveness of the geodesic trajectory approach in achieving a lightweight and structurally sound dome design, as well as the accuracy and reliability of the stress analysis using Abaqus commercial code. This study provides insights into the design and analysis of COPVs for aerospace applications, with the potential for further optimization and application in other industries. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=composite%20overwrapped%20pressure%20vessels" title="composite overwrapped pressure vessels">composite overwrapped pressure vessels</a>, <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=geodesic%20trajectory%20approach" title=" geodesic trajectory approach"> geodesic trajectory approach</a>, <a href="https://publications.waset.org/abstracts/search?q=dome%20design" title=" dome design"> dome design</a>, <a href="https://publications.waset.org/abstracts/search?q=stress%20analysis" title=" stress analysis"> stress analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=plugin%20python" title=" plugin python"> plugin python</a> </p> <a href="https://publications.waset.org/abstracts/167305/nextcovps-design-and-stress-analysis-of-dome-composite-overwrapped-pressure-vessels-using-geodesic-trajectory-approach" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/167305.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">92</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">6862</span> Securitization of Illegal Fishing Cases in Natuna Waters by Indonesian Government: Study Case of Chinese Vessels Shootouts 2016</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ray%20Maximillian">Ray Maximillian</a>, <a href="https://publications.waset.org/abstracts/search?q=Idil%20Syawfi"> Idil Syawfi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Indonesia’s Exclusive Economic Zone and the infamous China’s nine-dash line are intersected in Natuna waters. Even though from Indonesia perspective, that line does not possess any legal basis, China treat that line as their national boundaries, therefore allowing Chinese fishermen to fish in the area. Under President Joko Widodo leadership, Indonesia which now focusing to suppress illegal fishing cases while emphasizing their maritime sovereignty is facing an imminent threat from China’s presence in Natuna. Tension between these countries spiked after three incident happened on 2016, especially after Indonesian navy shot Chinese fishermen vessel that suspected doing illegal fishing activity. This action seen as an attempt to secure Indonesia’s law enforcement in their waters after several months before such attempt was intervened by Chinese coast guard. Indonesia tries to securitize this issue to justify the shooting they done to Chinese vessels. In the process of securitization, it is imperative to identify the existential threat that leads to implementation of emergency measures which responded by units in the cases. Chinese coast guard presence in Natuna perceived as an existential threat to Indonesia, therefore, responded by shooting to Chinese vessels on the next encounter. This action then responded by Chinese government who said that there is overlapping claim between them and Indonesia in Natuna. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=China" title="China">China</a>, <a href="https://publications.waset.org/abstracts/search?q=illegal%20fishing" title=" illegal fishing"> illegal fishing</a>, <a href="https://publications.waset.org/abstracts/search?q=Indonesia" title=" Indonesia"> Indonesia</a>, <a href="https://publications.waset.org/abstracts/search?q=natuna" title=" natuna"> natuna</a>, <a href="https://publications.waset.org/abstracts/search?q=securitization" title=" securitization"> securitization</a> </p> <a href="https://publications.waset.org/abstracts/83168/securitization-of-illegal-fishing-cases-in-natuna-waters-by-indonesian-government-study-case-of-chinese-vessels-shootouts-2016" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/83168.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">215</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">6861</span> Angiogenic Potential of Collagen Based Biomaterials Implanted on Chick Embryo Chorioallantoic Membrane as Alternative Microenvironment for in Vitro and in Vivo Angiogenesis Assays</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Anca%20Maria%20Cimpean">Anca Maria Cimpean</a>, <a href="https://publications.waset.org/abstracts/search?q=Serban%20Comsa"> Serban Comsa</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Chick embryo chorioallantoic membrane (CAM) is a well vascularised in vivo experimental model used as a platform for testing the behavior of different implants inserted on it from tumor fragments to therapeutic agents or various biomaterials. Five types of collagen-based biomaterials with 2D and 3D structure (MotifMesh, Optimaix2D, Optimaix3D, Dual Layer Collagen and Xenoderm) were implanted on CAM and continuously evaluated by stereomicroscope for up to 5 days post-implant with an emphasis of their ability to requisite and develop new blood vessels (BVs) followed by microscopic analysis. MotifMEsh did not induce any angiogenic response lacking to be invaded by BVs from the CAM, but it induced intense inflammatory response necrosis and fibroblastic reaction around the implant. Optimaix2D has good adherence. CAM with minimal or no inflammatory reaction, a good integration of the CAM between the collagen mesh’s fibers, consistent adhesion of the cells to the collagen fibers,and a good ability to form pseudo-vascular channels filled with cells. Optimaix3D induced the highest angiogenic effects on CAM. The material shows good integration on CAM. The collagen fibers of the material show the ability to organize themselves into linear and tubular structures. It is possible to see blood elements, especially at the periphery of the implant. Dual-layer collagen behaves similar to Optimaix 3D, while Xenoderm induced a moderate angiogenic effect on CAM. Based on these data, we may conclude that collagen-based materials have variable ability to requisite and develop new blood vessels. A proper selection of collagen-based biomaterial scaffolds may crucially influence the acquisition and development of blood vessels during angiogenesis assays. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=chick%20embryo%20chorioallantoic%20membrane" title="chick embryo chorioallantoic membrane">chick embryo chorioallantoic membrane</a>, <a href="https://publications.waset.org/abstracts/search?q=collagen%20scaffolds" title=" collagen scaffolds"> collagen scaffolds</a>, <a href="https://publications.waset.org/abstracts/search?q=blood%20vessels" title=" blood vessels"> blood vessels</a>, <a href="https://publications.waset.org/abstracts/search?q=vascular%20microenvironment" title=" vascular microenvironment"> vascular microenvironment</a> </p> <a href="https://publications.waset.org/abstracts/143642/angiogenic-potential-of-collagen-based-biomaterials-implanted-on-chick-embryo-chorioallantoic-membrane-as-alternative-microenvironment-for-in-vitro-and-in-vivo-angiogenesis-assays" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/143642.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">193</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">6860</span> Effect of Jet Diameter on Surface Quenching at Different Spatial Locations</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=C.%20Agrawal">C. Agrawal</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20Kumar"> R. Kumar</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Gupta"> A. Gupta</a>, <a href="https://publications.waset.org/abstracts/search?q=B.%20Chatterjee"> B. Chatterjee</a> </p> <p class="card-text"><strong>Abstract:</strong></p> An experimental investigation has been carried out to study the cooling of a hot horizontal Stainless Steel surface of 3 mm thickness, which has 800±10 °C initial temperature. A round water jet of 22 ± 1 °C temperature was injected over the hot surface through straight tube type nozzles of 2.5-4.8 mm diameter and 250 mm length. The experiments were performed for the jet exit to target surface spacing of 4 times of jet diameter and jet Reynolds number of 5000-24000. The effect of change in jet Reynolds number on the surface quenching has been investigated form the stagnation point to 16 mm spatial location. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=hot-surface" title="hot-surface">hot-surface</a>, <a href="https://publications.waset.org/abstracts/search?q=jet%20impingement" title=" jet impingement"> jet impingement</a>, <a href="https://publications.waset.org/abstracts/search?q=quenching" title=" quenching"> quenching</a>, <a href="https://publications.waset.org/abstracts/search?q=stagnation%20point" title=" stagnation point"> stagnation point</a> </p> <a href="https://publications.waset.org/abstracts/2139/effect-of-jet-diameter-on-surface-quenching-at-different-spatial-locations" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/2139.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">610</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">6859</span> ESDN Expression in the Tumor Microenvironment Coordinates Melanoma Progression</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Roberto%20Coppo">Roberto Coppo</a>, <a href="https://publications.waset.org/abstracts/search?q=Francesca%20Orso"> Francesca Orso</a>, <a href="https://publications.waset.org/abstracts/search?q=Daniela%20Dettori"> Daniela Dettori</a>, <a href="https://publications.waset.org/abstracts/search?q=Elena%20Quaglino"> Elena Quaglino</a>, <a href="https://publications.waset.org/abstracts/search?q=Lei%20Nie"> Lei Nie</a>, <a href="https://publications.waset.org/abstracts/search?q=Mehran%20M.%20Sadeghi"> Mehran M. Sadeghi</a>, <a href="https://publications.waset.org/abstracts/search?q=Daniela%20Taverna"> Daniela Taverna</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Malignant melanoma is currently the fifth most common cancer in the white population and it is fatal in its metastatic stage. Several research studies in recent years have provided evidence that cancer initiation and progression are driven by genetic alterations of the tumor and paracrine interactions between tumor and microenvironment. Scattered data show that the Endothelial and Smooth muscle cell-Derived Neuropilin-like molecule (ESDN) controls cell proliferation and movement of stroma and tumor cells. To investigate the role of ESDN in the tumor microenvironment during melanoma progression, murine melanoma cells (B16 or B16-F10) were injected in ESDN knockout mice in order to evaluate how the absence of ESDN in stromal cells could influence melanoma progression. While no effect was found on primary tumor growth, increased cell extravasation and lung metastasis formation was observed in ESDN knockout mice compared to wild type controls. In order to understand how cancer cells cross the endothelial barrier during metastatic dissemination in an ESDN-null microenvironment, structure, and permeability of lung blood vessels were analyzed. Interestingly, ESDN knockout mice showed structurally altered and more permeable vessels compared to wild type animals. Since cell surface molecules mediate the process of tumor cell extravasation, the expression of a panel of extravasation-related ligands and receptors was analyzed. Importantly, modulations of N-cadherin, E-selectin, ICAM-1 and VAP-1 were observed in ESDN knockout endothelial cells, suggesting the presence of a favorable tumor microenvironment which facilitates melanoma cell extravasation and metastasis formation in the absence of ESDN. Furthermore, a potential contribution of immune cells in tumor dissemination was investigated. An increased recruitment of macrophages in the lungs of ESDN knockout mice carrying subcutaneous B16-F10 tumors was found. In conclusion, our data suggest a functional role of ESDN in the tumor microenvironment during melanoma progression and the identification of the mechanisms that regulate tumor cell extravasation could lead to the development of new therapies to reduce metastasis formation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=melanoma" title="melanoma">melanoma</a>, <a href="https://publications.waset.org/abstracts/search?q=tumor%20microenvironment" title=" tumor microenvironment"> tumor microenvironment</a>, <a href="https://publications.waset.org/abstracts/search?q=extravasation" title=" extravasation"> extravasation</a>, <a href="https://publications.waset.org/abstracts/search?q=cell%20surface%20molecules" title=" cell surface molecules"> cell surface molecules</a> </p> <a href="https://publications.waset.org/abstracts/44830/esdn-expression-in-the-tumor-microenvironment-coordinates-melanoma-progression" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/44830.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">334</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">6858</span> Structural Design Optimization of Reinforced Thin-Walled Vessels under External Pressure Using Simulation and Machine Learning Classification Algorithm</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Lydia%20Novozhilova">Lydia Novozhilova</a>, <a href="https://publications.waset.org/abstracts/search?q=Vladimir%20Urazhdin"> Vladimir Urazhdin</a> </p> <p class="card-text"><strong>Abstract:</strong></p> An optimization problem for reinforced thin-walled vessels under uniform external pressure is considered. The conventional approaches to optimization generally start with pre-defined geometric parameters of the vessels, and then employ analytic or numeric calculations and/or experimental testing to verify functionality, such as stability under the projected conditions. The proposed approach consists of two steps. First, the feasibility domain will be identified in the multidimensional parameter space. Every point in the feasibility domain defines a design satisfying both geometric and functional constraints. Second, an objective function defined in this domain is formulated and optimized. The broader applicability of the suggested methodology is maximized by implementing the Support Vector Machines (SVM) classification algorithm of machine learning for identification of the feasible design region. Training data for SVM classifier is obtained using the Simulation package of SOLIDWORKS®. Based on the data, the SVM algorithm produces a curvilinear boundary separating admissible and not admissible sets of design parameters with maximal margins. Then optimization of the vessel parameters in the feasibility domain is performed using the standard algorithms for the constrained optimization. As an example, optimization of a ring-stiffened closed cylindrical thin-walled vessel with semi-spherical caps under high external pressure is implemented. As a functional constraint, von Mises stress criterion is used but any other stability constraint admitting mathematical formulation can be incorporated into the proposed approach. Suggested methodology has a good potential for reducing design time for finding optimal parameters of thin-walled vessels under uniform external pressure. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=design%20parameters" title="design parameters">design parameters</a>, <a href="https://publications.waset.org/abstracts/search?q=feasibility%20domain" title=" feasibility domain"> feasibility domain</a>, <a href="https://publications.waset.org/abstracts/search?q=von%20Mises%20stress%20criterion" title=" von Mises stress criterion"> von Mises stress criterion</a>, <a href="https://publications.waset.org/abstracts/search?q=Support%20Vector%20Machine%20%28SVM%29%20classifier" title=" Support Vector Machine (SVM) classifier"> Support Vector Machine (SVM) classifier</a> </p> <a href="https://publications.waset.org/abstracts/70305/structural-design-optimization-of-reinforced-thin-walled-vessels-under-external-pressure-using-simulation-and-machine-learning-classification-algorithm" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/70305.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">327</span> </span> </div> </div> <ul class="pagination"> <li class="page-item disabled"><span class="page-link">&lsaquo;</span></li> <li class="page-item active"><span class="page-link">1</span></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=surface%20vessels&page=2">2</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=surface%20vessels&page=3">3</a></li> <li class="page-item"><a class="page-link" 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