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inter-tier vias</title> <meta name="description" content="Search results for: monolithic inter-tier vias"> <meta name="keywords" content="monolithic inter-tier vias"> <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 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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="monolithic inter-tier vias"> <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> 76</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: monolithic inter-tier vias</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">76</span> Optimal Number and Placement of Vertical Links in 3D Network-On-Chip</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nesrine%20Toubaline">Nesrine Toubaline</a>, <a href="https://publications.waset.org/abstracts/search?q=Djamel%20Bennouar"> Djamel Bennouar</a>, <a href="https://publications.waset.org/abstracts/search?q=Ali%20Mahdoum"> Ali Mahdoum</a> </p> <p class="card-text"><strong>Abstract:</strong></p> 3D technology can lead to a significant reduction in power and average hop-count in Networks on Chip (NoCs). It offers short and fast vertical links which copes with the long wire problem in 2D NoCs. This work proposes heuristic-based method to optimize number and placement of vertical links to achieve specified performance goals. Experiments show that significant improvement can be achieved by using a specific number of vertical interconnect. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=interconnect%20optimization" title="interconnect optimization">interconnect optimization</a>, <a href="https://publications.waset.org/abstracts/search?q=monolithic%20inter-tier%20vias" title=" monolithic inter-tier vias"> monolithic inter-tier vias</a>, <a href="https://publications.waset.org/abstracts/search?q=network%20on%20chip" title=" network on chip"> network on chip</a>, <a href="https://publications.waset.org/abstracts/search?q=system%20on%20chip" title=" system on chip"> system on chip</a>, <a href="https://publications.waset.org/abstracts/search?q=through%20silicon%20vias" title=" through silicon vias"> through silicon vias</a>, <a href="https://publications.waset.org/abstracts/search?q=three%20dimensional%20integration%20circuits" title=" three dimensional integration circuits"> three dimensional integration circuits</a> </p> <a href="https://publications.waset.org/abstracts/60164/optimal-number-and-placement-of-vertical-links-in-3d-network-on-chip" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/60164.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">303</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">75</span> A Design for Application of Mobile Agent Technology to MicroService Architecture</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Masayuki%20Higashino">Masayuki Higashino</a>, <a href="https://publications.waset.org/abstracts/search?q=Toshiya%20Kawato"> Toshiya Kawato</a>, <a href="https://publications.waset.org/abstracts/search?q=Takao%20Kawamura"> Takao Kawamura</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A monolithic service is based on the N-tier architecture in many cases. In order to divide a monolithic service into microservices, it is necessary to redefine a model as a new microservice by extracting and merging existing models across layers. Refactoring a monolithic service into microservices requires advanced technical capabilities, and it is a difficult way. This paper proposes a design and concept to ease the migration of a monolithic service to microservices using the mobile agent technology. Our proposed approach, mobile agents-based design and concept, enables to ease dividing and merging services. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=mobile%20agent" title="mobile agent">mobile agent</a>, <a href="https://publications.waset.org/abstracts/search?q=microservice" title=" microservice"> microservice</a>, <a href="https://publications.waset.org/abstracts/search?q=web%20service" title=" web service"> web service</a>, <a href="https://publications.waset.org/abstracts/search?q=distributed%20system" title=" distributed system"> distributed system</a> </p> <a href="https://publications.waset.org/abstracts/87238/a-design-for-application-of-mobile-agent-technology-to-microservice-architecture" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/87238.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">164</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">74</span> Fabrication of Immune-Affinity Monolithic Array for Detection of α-Fetoprotein and Carcinoembryonic Antigen</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Li%20Li">Li Li</a>, <a href="https://publications.waset.org/abstracts/search?q=Li-Ru%20Xia"> Li-Ru Xia</a>, <a href="https://publications.waset.org/abstracts/search?q=He-Ye%20Wang"> He-Ye Wang</a>, <a href="https://publications.waset.org/abstracts/search?q=Xiao-Dong%20Bi"> Xiao-Dong Bi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, we presented a highly sensitive immune-affinity monolithic array for detection of α-fetoprotein (AFP) and carcinoembryonic antigen (CEA). Firstly, the epoxy functionalized monolith arrays were fabricated using UV initiated copolymerization method. Scanning electron microscopy (SEM) image showed that the poly(BABEA-<em>co</em>-GMA) monolith exhibited a well-controlled skeletal and well-distributed porous structure. Then, AFP and CEA immune-affinity monolithic arrays were prepared by immobilization of AFP and CEA antibodies on epoxy functionalized monolith arrays. With a non-competitive immune response format, the presented AFP and CEA immune-affinity arrays were demonstrated as an inexpensive, flexible, homogeneous and stable array for detection of AFP and CEA. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=chemiluminescent%20detection" title="chemiluminescent detection">chemiluminescent detection</a>, <a href="https://publications.waset.org/abstracts/search?q=immune-affinity" title=" immune-affinity"> immune-affinity</a>, <a href="https://publications.waset.org/abstracts/search?q=monolithic%20copolymer%20array" title=" monolithic copolymer array"> monolithic copolymer array</a>, <a href="https://publications.waset.org/abstracts/search?q=UV-initiated%20copolymerization" title=" UV-initiated copolymerization"> UV-initiated copolymerization</a> </p> <a href="https://publications.waset.org/abstracts/43820/fabrication-of-immune-affinity-monolithic-array-for-detection-of-a-fetoprotein-and-carcinoembryonic-antigen" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/43820.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">340</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">73</span> Chromatographic Preparation and Performance on Zinc Ion Imprinted Monolithic Column and Its Adsorption Property</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=X.%20Han">X. Han</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Duan"> S. Duan</a>, <a href="https://publications.waset.org/abstracts/search?q=C.%20Liu"> C. Liu</a>, <a href="https://publications.waset.org/abstracts/search?q=C.%20Zhou"> C. Zhou</a>, <a href="https://publications.waset.org/abstracts/search?q=W.%20Zhu"> W. Zhu</a>, <a href="https://publications.waset.org/abstracts/search?q=L.%20Kong"> L. Kong</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The ionic imprinting technique refers to the three-dimensional rigid structure with the fixed pore sizes, which was formed by the binding interactions of ions and functional monomers and used ions as the template, it has a high level of recognition to the ionic template. The preparation of monolithic column by the in-situ polymerization need to put the compound of template, functional monomers, cross-linking agent and initiating agent into the solution, dissolve it and inject to the column tube, and then the compound will have a polymerization reaction at a certain temperature, after the synthetic reaction, we washed out the unread template and solution. The monolithic columns are easy to prepare, low consumption and cost-effective with fast mass transfer, besides, they have many chemical functions. But the monolithic columns have some problems in the practical application, such as low-efficiency, quantitative analysis cannot be performed accurately because of the peak shape is wide and has tailing phenomena; the choice of polymerization systems is limited and the lack of theoretical foundations. Thus the optimization of components and preparation methods is an important research direction. During the preparation of ionic imprinted monolithic columns, pore-forming agent can make the polymer generate the porous structure, which can influence the physical properties of polymer, what’ s more, it can directly decide the stability and selectivity of polymerization reaction. The compounds generated in the pre-polymerization reaction could directly decide the identification and screening capabilities of imprinted polymer; thus the choice of pore-forming agent is quite critical in the preparation of imprinted monolithic columns. This article mainly focuses on the research that when using different pore-forming agents, the impact of zinc ion imprinted monolithic column on the enrichment performance of zinc ion. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=high%20performance%20liquid%20chromatography%20%28HPLC%29" title="high performance liquid chromatography (HPLC)">high performance liquid chromatography (HPLC)</a>, <a href="https://publications.waset.org/abstracts/search?q=ionic%20imprinting" title=" ionic imprinting"> ionic imprinting</a>, <a href="https://publications.waset.org/abstracts/search?q=monolithic%20column" title=" monolithic column"> monolithic column</a>, <a href="https://publications.waset.org/abstracts/search?q=pore-forming%20agent" title=" pore-forming agent"> pore-forming agent</a> </p> <a href="https://publications.waset.org/abstracts/82128/chromatographic-preparation-and-performance-on-zinc-ion-imprinted-monolithic-column-and-its-adsorption-property" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/82128.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">214</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">72</span> Organic Co-Polymer Monolithic Columns for Liquid Chromatography Mixed Mode Protein Separations</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20Alkarimi">Ahmed Alkarimi</a>, <a href="https://publications.waset.org/abstracts/search?q=Kevin%20Welham"> Kevin Welham</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Organic mixed mode monolithic columns were fabricated from; glycidyl methacrylate-co-ethylene dimethacrylate-co-stearyl methacrylate, using glycidyl methacrylate and stearyl methacrylate as co monomers representing 30% and 70% respectively of the liquid volume with ethylene dimethacrylate crosslinker and 2,2-dimethoxy-2-phenylacetophenone as the free radical initiator. The monomers were mixed with a binary porogenic solvent, comprising propan-1-ol, and methanol (0.825 mL each). The monolith was formed by photo polymerization (365 nm) inside a borosilicate glass tube (1.5 mm ID and 3 mm OD x 50 mm length). The monolith was observed to have formed correctly by optical examination and generated reasonable backpressure, approximately 650 psi at a flow rate of 0.2 mL min⁻¹ 50:50 acetonitrile: water. The morphological properties of the monolithic columns were investigated using scanning electron microscopy images, and Brunauer-Emmett-Teller analysis, the results showed that the monolith was formed properly with 19.98 ± 0.01 mm² surface area, 0.0205 ± 0.01 cm³ g⁻¹ pore volume and 6.93 ± 0.01 nm average pore size. The polymer monolith formed was further investigated using proton nuclear magnetic resonance, and Fourier transform infrared spectroscopy. The monolithic columns were investigated using high-performance liquid chromatography to test their ability to separate different samples with a range of properties. The columns displayed both hydrophobic/hydrophilic and hydrophobic/ion exchange interactions with the compounds tested indicating that true mixed mode separations. The mixed mode monolithic columns exhibited significant separation of proteins. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=LC%20separation" title="LC separation">LC separation</a>, <a href="https://publications.waset.org/abstracts/search?q=proteins%20separation" title=" proteins separation"> proteins separation</a>, <a href="https://publications.waset.org/abstracts/search?q=monolithic%20column" title=" monolithic column"> monolithic column</a>, <a href="https://publications.waset.org/abstracts/search?q=mixed%20mode" title=" mixed mode"> mixed mode</a> </p> <a href="https://publications.waset.org/abstracts/76321/organic-co-polymer-monolithic-columns-for-liquid-chromatography-mixed-mode-protein-separations" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/76321.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">162</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">71</span> An UHPLC (Ultra High Performance Liquid Chromatography) Method for the Simultaneous Determination of Norfloxacin, Metronidazole, and Tinidazole Using Monolithic Column-Stability Indicating Application</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Asmaa%20Mandour">Asmaa Mandour</a>, <a href="https://publications.waset.org/abstracts/search?q=Ramzia%20El-Bagary"> Ramzia El-Bagary</a>, <a href="https://publications.waset.org/abstracts/search?q=Asmaa%20El-Zaher"> Asmaa El-Zaher</a>, <a href="https://publications.waset.org/abstracts/search?q=Ehab%20Elkady"> Ehab Elkady</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Background: An UHPLC (ultra high performance liquid chromatography) method for the simultaneous determination of norfloxacin (NOR), metronidazole (MET) and tinidazole (TNZ) using monolithic column is presented. Purpose: The method is considered an environmentally friendly method with relatively low organic composition of the mobile phase. Methods: The chromatographic separation was performed using Phenomenex® Onyex Monolithic C18 (50mmx 20mm) column. An elution program of mobile phase consisted of 0.5% aqueous phosphoric acid : methanol (85:15, v/v). Where elution of all drugs was completed within 3.5 min with 1µL injection volume. The UHPLC method was applied for the stability indication of NOR in the presence of its acid degradation product ND. Results: Retention times were 0.69, 1.19 and 3.23 min for MET, TNZ and NOR, respectively. While ND retention time was 1.06 min. Linearity, accuracy, and precision were acceptable over the concentration range of 5-50µg mL-1for all drugs. Conclusions: The method is simple, sensitive and suitable for the routine quality control and dosage form assay of the three drugs and can also be used for the stability indication of NOR in the presence of its acid degradation product. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=antibacterial" title="antibacterial">antibacterial</a>, <a href="https://publications.waset.org/abstracts/search?q=monolithic%20cilumn" title=" monolithic cilumn"> monolithic cilumn</a>, <a href="https://publications.waset.org/abstracts/search?q=simultaneous%20determination" title=" simultaneous determination"> simultaneous determination</a>, <a href="https://publications.waset.org/abstracts/search?q=UHPLC" title=" UHPLC"> UHPLC</a> </p> <a href="https://publications.waset.org/abstracts/52684/an-uhplc-ultra-high-performance-liquid-chromatography-method-for-the-simultaneous-determination-of-norfloxacin-metronidazole-and-tinidazole-using-monolithic-column-stability-indicating-application" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/52684.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">253</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">70</span> Effect of Chromium Behavior on Mechanical and Electrical Properties Of P/M Copper-Chromium Alloy Dispersed with VGCF</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hisashi%20Imai">Hisashi Imai</a>, <a href="https://publications.waset.org/abstracts/search?q=Kuan-Yu%20Chen"> Kuan-Yu Chen</a>, <a href="https://publications.waset.org/abstracts/search?q=Katsuyoshi%20Kondoh"> Katsuyoshi Kondoh</a>, <a href="https://publications.waset.org/abstracts/search?q=Hung-Yin%20Tsai"> Hung-Yin Tsai</a>, <a href="https://publications.waset.org/abstracts/search?q=Junko%20Umeda"> Junko Umeda</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Microstructural and electrical properties of copper-chromium alloy (Cu-Cr) dispersed with vapor-grown carbon fiber (VGCF) prepared by powder metallurgy (P/M) process have been investigated. Cu-0.7 mass% Cr pre-alloyed powder (Cu-Cr) made by water atomization process was used as raw materials, which contained solid solute Cr elements in Cu matrix. The alloy powder coated with un-bundled VGCF by using oil coating process was consolidated at 1223 K in vacuum by spark plasma sintering, and then extruded at 1073 K. The extruded Cu-Cr alloy (monolithic alloy) had 209.3 MPa YS and 80.4 IACS% conductivity. The extruded Cu-Cr with 0.1 mass% VGCF composites revealed a small decrease of YS compared to the monolithic Cu-Cr alloy. On the other hand, the composite had a higher electrical conductivity than that of the monolithic alloy. For example, Cu-Cr with 0.1 mass% VGCF composite sintered for 5 h showed 182.7 MPa YS and 89.7 IACS% conductivity. In the case of Cu-Cr with VGCFs composites, the Cr concentration was observed around VGCF by SEM-EDS analysis, where Cr23C6 compounds were detected by TEM observation. The amount of Cr solid solution in the matrix of the Cu-Cr composites alloy was about 50% compared to the monolithic Cu-Cr sintered alloy, and resulted in the remarkable increment of the electrical conductivity. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=powder%20metallurgy%20Cu-Cr%20alloy%20powder" title="powder metallurgy Cu-Cr alloy powder">powder metallurgy Cu-Cr alloy powder</a>, <a href="https://publications.waset.org/abstracts/search?q=vapor-grown%20carbon%20fiber" title=" vapor-grown carbon fiber"> vapor-grown carbon fiber</a>, <a href="https://publications.waset.org/abstracts/search?q=electrical%20conductivity" title=" electrical conductivity"> electrical conductivity</a> </p> <a href="https://publications.waset.org/abstracts/24251/effect-of-chromium-behavior-on-mechanical-and-electrical-properties-of-pm-copper-chromium-alloy-dispersed-with-vgcf" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/24251.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">493</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">69</span> Efficient Monolithic FEM for Compressible Flow and Conjugate Heat Transfer</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Santhosh%20A.%20K.">Santhosh A. K.</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This work presents an efficient monolithic finite element strategy for solving thermo-fluid-structure interaction problems involving compressible fluids and linear-elastic structure. This formulation uses displacement variables for structure and velocity variables for the fluid, with no additional variables required to ensure traction, velocity, temperature, and heat flux continuity at the fluid-structure interface. Rate of convergence in each time step is quadratic, which is achieved in this formulation by deriving an exact tangent stiffness matrix. The robustness and good performance of the method is ascertained by applying the proposed strategy on a wide spectrum of problems taken from the literature pertaining to steady, transient, two dimensional, axisymmetric, and three dimensional fluid flow and conjugate heat transfer. It is shown that the current formulation gives excellent results on all the case studies conducted, which includes problems involving compressibility effects as well as problems where fluid can be treated as incompressible. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=linear%20thermoelasticity" title="linear thermoelasticity">linear thermoelasticity</a>, <a href="https://publications.waset.org/abstracts/search?q=compressible%20flow" title=" compressible flow"> compressible flow</a>, <a href="https://publications.waset.org/abstracts/search?q=conjugate%20heat%20transfer" title=" conjugate heat transfer"> conjugate heat transfer</a>, <a href="https://publications.waset.org/abstracts/search?q=monolithic%20FEM" title=" monolithic FEM"> monolithic FEM</a> </p> <a href="https://publications.waset.org/abstracts/139003/efficient-monolithic-fem-for-compressible-flow-and-conjugate-heat-transfer" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/139003.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">199</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">68</span> A Monolithic Arbitrary Lagrangian-Eulerian Finite Element Strategy for Partly Submerged Solid in Incompressible Fluid with Mortar Method for Modeling the Contact Surface</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Suman%20Dutta">Suman Dutta</a>, <a href="https://publications.waset.org/abstracts/search?q=Manish%20Agrawal"> Manish Agrawal</a>, <a href="https://publications.waset.org/abstracts/search?q=C.%20S.%20Jog"> C. S. Jog</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Accurate computation of hydrodynamic forces on floating structures and their deformation finds application in the ocean and naval engineering and wave energy harvesting. This manuscript presents a monolithic, finite element strategy for fluid-structure interaction involving hyper-elastic solids partly submerged in an incompressible fluid. A velocity-based Arbitrary Lagrangian-Eulerian (ALE) formulation has been used for the fluid and a displacement-based Lagrangian approach has been used for the solid. The flexibility of the ALE technique permits us to treat the free surface of the fluid as a Lagrangian entity. At the interface, the continuity of displacement, velocity and traction are enforced using the mortar method. In the mortar method, the constraints are enforced in a weak sense using the Lagrange multiplier method. In the literature, the mortar method has been shown to be robust in solving various contact mechanics problems. The time-stepping strategy used in this work reduces to the generalized trapezoidal rule in the Eulerian setting. In the Lagrangian limit, in the absence of external load, the algorithm conserves the linear and angular momentum and the total energy of the system. The use of monolithic coupling with an energy-conserving time-stepping strategy gives an unconditionally stable algorithm and allows the user to take large time steps. All the governing equations and boundary conditions have been mapped to the reference configuration. The use of the exact tangent stiffness matrix ensures that the algorithm converges quadratically within each time step. The robustness and good performance of the proposed method are demonstrated by solving benchmark problems from the literature. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ALE" title="ALE">ALE</a>, <a href="https://publications.waset.org/abstracts/search?q=floating%20body" title=" floating body"> floating body</a>, <a href="https://publications.waset.org/abstracts/search?q=fluid-structure%20interaction" title=" fluid-structure interaction"> fluid-structure interaction</a>, <a href="https://publications.waset.org/abstracts/search?q=monolithic" title=" monolithic"> monolithic</a>, <a href="https://publications.waset.org/abstracts/search?q=mortar%20method" title=" mortar method"> mortar method</a> </p> <a href="https://publications.waset.org/abstracts/134333/a-monolithic-arbitrary-lagrangian-eulerian-finite-element-strategy-for-partly-submerged-solid-in-incompressible-fluid-with-mortar-method-for-modeling-the-contact-surface" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/134333.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">274</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">67</span> Rapid Separation of Biomolecules and Neutral Analytes with a Cationic Stationary Phase by Capillary Electrochromatography</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20Aslihan%20Gokaltun">A. Aslihan Gokaltun</a>, <a href="https://publications.waset.org/abstracts/search?q=Ali%20Tuncel"> Ali Tuncel</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The unique properties of capillary electrochromatography (CEC) such as high performance, high selectivity, low consumption of both reagents and analytes ensure this technique an attractive one for the separation of biomolecules including nucleosides and nucleotides, peptides, proteins, carbohydrates. Monoliths have become a well-established separation media for CEC in the format that can be compared to a single large 'particle' that does not include interparticular voids. Convective flow through the pores of monolith significantly accelerates the rate of mass transfer and enables a substantial increase in the speed of the separation. In this work, we propose a new approach for the preparation of cationic monolithic stationary phase for capillary electrochromatography. Instead of utilizing a charge bearing monomer during polymerization, the desired charge-bearing group is generated on the capillary monolith after polymerization by using the reactive moiety of the monolithic support via one-pot, simple reaction. Optimized monolithic column compensates the disadvantages of frequently used reversed phases, which are difficult for separation of polar solutes. Rapid separation and high column efficiencies are achieved for the separation of neutral analytes, nucleic acid bases and nucleosides in reversed phase mode. Capillary monolith showed satisfactory hydrodynamic permeability and mechanical stability with relative standard deviation (RSD) values below 2 %. A new promising, reactive support that has a 'ligand selection flexibility' due to its reactive functionality represent a new family of separation media for CEC. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=biomolecules" title="biomolecules">biomolecules</a>, <a href="https://publications.waset.org/abstracts/search?q=capillary%20electrochromatography" title=" capillary electrochromatography"> capillary electrochromatography</a>, <a href="https://publications.waset.org/abstracts/search?q=cationic%20monolith" title=" cationic monolith"> cationic monolith</a>, <a href="https://publications.waset.org/abstracts/search?q=neutral%20analytes" title=" neutral analytes"> neutral analytes</a> </p> <a href="https://publications.waset.org/abstracts/70026/rapid-separation-of-biomolecules-and-neutral-analytes-with-a-cationic-stationary-phase-by-capillary-electrochromatography" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/70026.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">212</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">66</span> Relocation of Plastic Hinge of Interior Beam Column Connections with Intermediate Bars in Reinforced Concrete and T-Section Steel Inserts in Precast Concrete Frames</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=P.%20Wongmatar">P. Wongmatar</a>, <a href="https://publications.waset.org/abstracts/search?q=C.%20Hansapinyo"> C. Hansapinyo</a>, <a href="https://publications.waset.org/abstracts/search?q=C.%20Buachart"> C. Buachart</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Failure of typical seismic frames has been found by plastic hinge occurring on beams section near column faces. Past researches shown that the seismic capacity of the frames can be enhanced if the plastic hinges of the beams are shifted away from the column faces. This paper presents detailing of reinforcements in the interior beam–column connections aiming to relocate the plastic hinge of reinforced concrete and precast concrete frames. Four specimens were tested under quasi-static cyclic load including two monolithic specimens and two precast specimens. For one monolithic specimen, typical seismic reinforcement was provided and considered as a reference specimen named M1. The other reinforced concrete frame M2 contained additional intermediate steel in the connection area compared with the specimen M1. For the precast specimens, embedded T-section steels in joint were provided, with and without diagonal bars in the connection area for specimen P1 and P2, respectively. The test results indicated the ductile failure with beam flexural failure in monolithic specimen M1 and the intermediate steel increased strength and improved joint performance of specimen M2. For the precast specimens, cracks generated at the end of the steel inserts. However, slipping of reinforcing steel lapped in top of the beams was seen before yielding of the main bars leading to the brittle failure. The diagonal bars in precast specimens P2 improved the connection stiffness and the energy dissipation capacity. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=relocation" title="relocation">relocation</a>, <a href="https://publications.waset.org/abstracts/search?q=plastic%20hinge" title=" plastic hinge"> plastic hinge</a>, <a href="https://publications.waset.org/abstracts/search?q=intermediate%20bar" title=" intermediate bar"> intermediate bar</a>, <a href="https://publications.waset.org/abstracts/search?q=T-section%20steel" title=" T-section steel"> T-section steel</a>, <a href="https://publications.waset.org/abstracts/search?q=precast%20concrete%20frame" title=" precast concrete frame"> precast concrete frame</a> </p> <a href="https://publications.waset.org/abstracts/27574/relocation-of-plastic-hinge-of-interior-beam-column-connections-with-intermediate-bars-in-reinforced-concrete-and-t-section-steel-inserts-in-precast-concrete-frames" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/27574.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">273</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">65</span> Fully Coupled Porous Media Model</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nia%20Mair%20Fry">Nia Mair Fry</a>, <a href="https://publications.waset.org/abstracts/search?q=Matthew%20Profit"> Matthew Profit</a>, <a href="https://publications.waset.org/abstracts/search?q=Chenfeng%20Li"> Chenfeng Li</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This work focuses on the development and implementation of a fully implicit-implicit, coupled mechanical deformation and porous flow, finite element software tool. The fully implicit software accurately predicts classical fundamental analytical solutions such as the Terzaghi consolidation problem. Furthermore, it can capture other analytical solutions less well known in the literature, such as Gibson’s sedimentation rate problem and Coussy’s problems investigating wellbore stability for poroelastic rocks. The mechanical volume strains are transferred to the porous flow governing equation in an implicit framework. This will overcome some of the many current industrial issues, which use explicit solvers for the mechanical governing equations and only implicit solvers on the porous flow side. This can potentially lead to instability and non-convergence issues in the coupled system, plus giving results with an accountable degree of error. The specification of a fully monolithic implicit-implicit coupled porous media code sees the solution of both seepage-mechanical equations in one matrix system, under a unified time-stepping scheme, which makes the problem definition much easier. When using an explicit solver, additional input such as the damping coefficient and mass scaling factor is required, which are circumvented with a fully implicit solution. Further, improved accuracy is achieved as the solution is not dependent on predictor-corrector methods for the pore fluid pressure solution, but at the potential cost of reduced stability. In testing of this fully monolithic porous media code, there is the comparison of the fully implicit coupled scheme against an existing staggered explicit-implicit coupled scheme solution across a range of geotechnical problems. These cases include 1) Biot coefficient calculation, 2) consolidation theory with Terzaghi analytical solution, 3) sedimentation theory with Gibson analytical solution, and 4) Coussy well-bore poroelastic analytical solutions. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=coupled" title="coupled">coupled</a>, <a href="https://publications.waset.org/abstracts/search?q=implicit" title=" implicit"> implicit</a>, <a href="https://publications.waset.org/abstracts/search?q=monolithic" title=" monolithic"> monolithic</a>, <a href="https://publications.waset.org/abstracts/search?q=porous%20media" title=" porous media"> porous media</a> </p> <a href="https://publications.waset.org/abstracts/136188/fully-coupled-porous-media-model" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/136188.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">138</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">64</span> Series Connected GaN Resonant Tunneling Diodes for Multiple-Valued Logic</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Fang%20Liu">Fang Liu</a>, <a href="https://publications.waset.org/abstracts/search?q=JunShuai%20Xue"> JunShuai Xue</a>, <a href="https://publications.waset.org/abstracts/search?q=JiaJia%20Yao"> JiaJia Yao</a>, <a href="https://publications.waset.org/abstracts/search?q=XueYan%20Yang"> XueYan Yang</a>, <a href="https://publications.waset.org/abstracts/search?q=ZuMao%20Li"> ZuMao Li</a>, <a href="https://publications.waset.org/abstracts/search?q=GuanLin%20Wu"> GuanLin Wu</a>, <a href="https://publications.waset.org/abstracts/search?q=HePeng%20Zhang"> HePeng Zhang</a>, <a href="https://publications.waset.org/abstracts/search?q=ZhiPeng%20Sun"> ZhiPeng Sun</a> </p> <p class="card-text"><strong>Abstract:</strong></p> III-Nitride resonant tunneling diode (RTD) is one of the most promising candidates for multiple-valued logic (MVL) elements. Here, we report a monolithic integration of GaN resonant tunneling diodes to realize multiple negative differential resistance (NDR) regions for MVL application. GaN RTDs, composed of a 2 nm quantum well embedded in two 1 nm quantum barriers, are grown by plasma-assisted molecular beam epitaxy on free-standing c-plane GaN substrates. Negative differential resistance characteristic with a peak current density of 178 kA/cm² in conjunction with a peak-to-valley current ratio (PVCR) of 2.07 is observed. Statistical properties exhibit high consistency showing a peak current density standard deviation of almost 1%, laying the foundation for the monolithic integration. After complete electrical isolation, two diodes of the designed same area are connected in series. By solving the Poisson equation and Schrodinger equation in one dimension, the energy band structure is calculated to explain the transport mechanism of the differential negative resistance phenomenon. Resonant tunneling events in a sequence of the series-connected RTD pair (SCRTD) form multiple NDR regions with nearly equal peak current, obtaining three stable operating states corresponding to ternary logic. A frequency multiplier circuit achieved using this integration is demonstrated, attesting to the robustness of this multiple peaks feature. This article presents a monolithic integration of SCRTD with multiple NDR regions driven by the resonant tunneling mechanism, which can be applied to a multiple-valued logic field, promising a fast operation speed and a great reduction of circuit complexity and demonstrating a new solution for nitride devices to break through the limitations of binary logic. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=GaN%20resonant%20tunneling%20diode" title="GaN resonant tunneling diode">GaN resonant tunneling diode</a>, <a href="https://publications.waset.org/abstracts/search?q=multiple-valued%20logic%20system" title=" multiple-valued logic system"> multiple-valued logic system</a>, <a href="https://publications.waset.org/abstracts/search?q=frequency%20multiplier" title=" frequency multiplier"> frequency multiplier</a>, <a href="https://publications.waset.org/abstracts/search?q=negative%20differential%20resistance" title=" negative differential resistance"> negative differential resistance</a>, <a href="https://publications.waset.org/abstracts/search?q=peak-to-valley%20current%20ratio" title=" peak-to-valley current ratio"> peak-to-valley current ratio</a> </p> <a href="https://publications.waset.org/abstracts/163097/series-connected-gan-resonant-tunneling-diodes-for-multiple-valued-logic" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/163097.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">81</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">63</span> Miniaturized Wideband Single-Feed Shorted-Edge Stacked Patch Antenna for C-Band Applications</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Abdelheq%20Boukarkar">Abdelheq Boukarkar</a>, <a href="https://publications.waset.org/abstracts/search?q=Omar%20Guermoua"> Omar Guermoua</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, we propose a miniaturized and wideband patch antenna for C-band applications. The antenna miniaturization is obtained by loading shorting vias along one patch edge. At the same time, the wideband performance is achieved by combining two resonances using one feed line. The measured results reveal that the antenna covers the frequency band 4.32 GHz to 6.52 GHz (41%) with a peak gain and a peak efficiency of 5.5 dBi and 87%, respectively. The antenna occupies a relatively small size of only 26 x 22 x 5.6 mm<sup>3</sup>, making it suitable for compact wireless devices requiring a stable unidirectional gain over a wide frequency range. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=miniaturized%20antennas" title="miniaturized antennas">miniaturized antennas</a>, <a href="https://publications.waset.org/abstracts/search?q=patch%20antennas" title=" patch antennas"> patch antennas</a>, <a href="https://publications.waset.org/abstracts/search?q=stable%20gain" title=" stable gain"> stable gain</a>, <a href="https://publications.waset.org/abstracts/search?q=wideband%20antennas" title=" wideband antennas"> wideband antennas</a> </p> <a href="https://publications.waset.org/abstracts/131057/miniaturized-wideband-single-feed-shorted-edge-stacked-patch-antenna-for-c-band-applications" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/131057.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">217</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">62</span> Finite Element Modelling and Optimization of Post-Machining Distortion for Large Aerospace Monolithic Components</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Bin%20Shi">Bin Shi</a>, <a href="https://publications.waset.org/abstracts/search?q=Mouhab%20Meshreki"> Mouhab Meshreki</a>, <a href="https://publications.waset.org/abstracts/search?q=Gr%C3%A9goire%20Bazin"> Grégoire Bazin</a>, <a href="https://publications.waset.org/abstracts/search?q=Helmi%20Attia"> Helmi Attia</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Large monolithic components are widely used in the aerospace industry in order to reduce airplane weight. Milling is an important operation in manufacturing of the monolithic parts. More than 90% of the material could be removed in the milling operation to obtain the final shape. This results in low rigidity and post-machining distortion. The post-machining distortion is the deviation of the final shape from the original design after releasing the clamps. It is a major challenge in machining of the monolithic parts, which costs billions of economic losses every year. Three sources are directly related to the part distortion, including initial residual stresses (RS) generated from previous manufacturing processes, machining-induced RS and thermal load generated during machining. A finite element model was developed to simulate a milling process and predicate the post-machining distortion. In this study, a rolled-aluminum plate AA7175 with a thickness of 60 mm was used for the raw block. The initial residual stress distribution in the block was measured using a layer-removal method. A stress-mapping technique was developed to implement the initial stress distribution into the part. It is demonstrated that this technique significantly accelerates the simulation time. Machining-induced residual stresses on the machined surface were measured using MTS3000 hole-drilling strain-gauge system. The measured RS was applied on the machined surface of a plate to predict the distortion. The predicted distortion was compared with experimental results. It is found that the effect of the machining-induced residual stress on the distortion of a thick plate is very limited. The distortion can be ignored if the wall thickness is larger than a certain value. The RS generated from the thermal load during machining is another important factor causing part distortion. Very limited number of research on this topic was reported in literature. A coupled thermo-mechanical FE model was developed to evaluate the thermal effect on the plastic deformation of a plate. A moving heat source with a feed rate was used to simulate the dynamic cutting heat in a milling process. When the heat source passed the part surface, a small layer was removed to simulate the cutting operation. The results show that for different feed rates and plate thicknesses, the plastic deformation/distortion occurs only if the temperature exceeds a critical level. It was found that the initial residual stress has a major contribution to the part distortion. The machining-induced stress has limited influence on the distortion for thin-wall structure when the wall thickness is larger than a certain value. The thermal load can also generate part distortion when the cutting temperature is above a critical level. The developed numerical model was employed to predict the distortion of a frame part with complex structures. The predictions were compared with the experimental measurements, showing both are in good agreement. Through optimization of the position of the part inside the raw plate using the developed numerical models, the part distortion can be significantly reduced by 50%. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=modelling" title="modelling">modelling</a>, <a href="https://publications.waset.org/abstracts/search?q=monolithic%20parts" title=" monolithic parts"> monolithic parts</a>, <a href="https://publications.waset.org/abstracts/search?q=optimization" title=" optimization"> optimization</a>, <a href="https://publications.waset.org/abstracts/search?q=post-machining%20distortion" title=" post-machining distortion"> post-machining distortion</a>, <a href="https://publications.waset.org/abstracts/search?q=residual%20stresses" title=" residual stresses"> residual stresses</a> </p> <a href="https://publications.waset.org/abstracts/183107/finite-element-modelling-and-optimization-of-post-machining-distortion-for-large-aerospace-monolithic-components" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/183107.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">54</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">61</span> Nonlinear Dynamic Analysis of Base-Isolated Structures Using a Mixed Integration Method: Stability Aspects and Computational Efficiency</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nicol%C3%B2%20Vaiana">Nicolò Vaiana</a>, <a href="https://publications.waset.org/abstracts/search?q=Filip%20C.%20Filippou"> Filip C. Filippou</a>, <a href="https://publications.waset.org/abstracts/search?q=Giorgio%20Serino"> Giorgio Serino</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In order to reduce numerical computations in the nonlinear dynamic analysis of seismically base-isolated structures, a Mixed Explicit-Implicit time integration Method (MEIM) has been proposed. Adopting the explicit conditionally stable central difference method to compute the nonlinear response of the base isolation system, and the implicit unconditionally stable Newmark’s constant average acceleration method to determine the superstructure linear response, the proposed MEIM, which is conditionally stable due to the use of the central difference method, allows to avoid the iterative procedure generally required by conventional monolithic solution approaches within each time step of the analysis. The main aim of this paper is to investigate the stability and computational efficiency of the MEIM when employed to perform the nonlinear time history analysis of base-isolated structures with sliding bearings. Indeed, in this case, the critical time step could become smaller than the one used to define accurately the earthquake excitation due to the very high initial stiffness values of such devices. The numerical results obtained from nonlinear dynamic analyses of a base-isolated structure with a friction pendulum bearing system, performed by using the proposed MEIM, are compared to those obtained adopting a conventional monolithic solution approach, i.e. the implicit unconditionally stable Newmark’s constant acceleration method employed in conjunction with the iterative pseudo-force procedure. According to the numerical results, in the presented numerical application, the MEIM does not have stability problems being the critical time step larger than the ground acceleration one despite of the high initial stiffness of the friction pendulum bearings. In addition, compared to the conventional monolithic solution approach, the proposed algorithm preserves its computational efficiency even when it is adopted to perform the nonlinear dynamic analysis using a smaller time step. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=base%20isolation" title="base isolation">base isolation</a>, <a href="https://publications.waset.org/abstracts/search?q=computational%20efficiency" title=" computational efficiency"> computational efficiency</a>, <a href="https://publications.waset.org/abstracts/search?q=mixed%20explicit-implicit%20method" title=" mixed explicit-implicit method"> mixed explicit-implicit method</a>, <a href="https://publications.waset.org/abstracts/search?q=partitioned%20solution%20approach" title=" partitioned solution approach"> partitioned solution approach</a>, <a href="https://publications.waset.org/abstracts/search?q=stability" title=" stability"> stability</a> </p> <a href="https://publications.waset.org/abstracts/59056/nonlinear-dynamic-analysis-of-base-isolated-structures-using-a-mixed-integration-method-stability-aspects-and-computational-efficiency" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/59056.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">278</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">60</span> Vision and Challenges of Developing VR-Based Digital Anatomy Learning Platforms and a Solution Set for 3D Model Marking</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Gizem%20Kayar">Gizem Kayar</a>, <a href="https://publications.waset.org/abstracts/search?q=Ramazan%20Bakir"> Ramazan Bakir</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Ilkay%20Ko%C5%9Far"> M. Ilkay Koşar</a>, <a href="https://publications.waset.org/abstracts/search?q=Ceren%20U.%20Gencer"> Ceren U. Gencer</a>, <a href="https://publications.waset.org/abstracts/search?q=Alperen%20Ayyildiz"> Alperen Ayyildiz</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Anatomy classes are crucial for general education of medical students, whereas learning anatomy is quite challenging and requires memorization of thousands of structures. In traditional teaching methods, learning materials are still based on books, anatomy mannequins, or videos. This results in forgetting many important structures after several years. However, more interactive teaching methods like virtual reality, augmented reality, gamification, and motion sensors are becoming more popular since such methods ease the way we learn and keep the data in mind for longer terms. During our study, we designed a virtual reality based digital head anatomy platform to investigate whether a fully interactive anatomy platform is effective to learn anatomy and to understand the level of teaching and learning optimization. The Head is one of the most complicated human anatomy structures, with thousands of tiny, unique structures. This makes the head anatomy one of the most difficult parts to understand during class sessions. Therefore, we developed a fully interactive digital tool with 3D model marking, quiz structures, 2D/3D puzzle structures, and VR support so as to integrate the power of VR and gamification. The project has been developed in Unity game engine with HTC Vive Cosmos VR headset. The head anatomy 3D model has been selected with full skeletal, muscular, integumentary, head, teeth, lymph, and vein system. The biggest issue during the development was the complexity of our model and the marking of it in the 3D world system. 3D model marking requires to access to each unique structure in the counted subsystems which means hundreds of marking needs to be done. Some parts of our 3D head model were monolithic. This is why we worked on dividing such parts to subparts which is very time-consuming. In order to subdivide monolithic parts, one must use an external modeling tool. However, such tools generally come with high learning curves, and seamless division is not ensured. Second option was to integrate tiny colliders to all unique items for mouse interaction. However, outside colliders which cover inner trigger colliders cause overlapping, and these colliders repel each other. Third option is using raycasting. However, due to its own view-based nature, raycasting has some inherent problems. As the model rotate, view direction changes very frequently, and directional computations become even harder. This is why, finally, we studied on the local coordinate system. By taking the pivot point of the model into consideration (back of the nose), each sub-structure is marked with its own local coordinate with respect to the pivot. After converting the mouse position to the world position and checking its relation with the corresponding structure’s local coordinate, we were able to mark all points correctly. The advantage of this method is its applicability and accuracy for all types of monolithic anatomical structures. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=anatomy" title="anatomy">anatomy</a>, <a href="https://publications.waset.org/abstracts/search?q=e-learning" title=" e-learning"> e-learning</a>, <a href="https://publications.waset.org/abstracts/search?q=virtual%20reality" title=" virtual reality"> virtual reality</a>, <a href="https://publications.waset.org/abstracts/search?q=3D%20model%20marking" title=" 3D model marking"> 3D model marking</a> </p> <a href="https://publications.waset.org/abstracts/144051/vision-and-challenges-of-developing-vr-based-digital-anatomy-learning-platforms-and-a-solution-set-for-3d-model-marking" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/144051.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">100</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">59</span> Metal-Organic Chemical Vapor Deposition (MOCVD) Process Investigation for Co Thin Film as a TSV Alternative Seed Layer</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sajjad%20Esmaeili">Sajjad Esmaeili</a>, <a href="https://publications.waset.org/abstracts/search?q=Robert%20Krause"> Robert Krause</a>, <a href="https://publications.waset.org/abstracts/search?q=Lukas%20Gerlich"> Lukas Gerlich</a>, <a href="https://publications.waset.org/abstracts/search?q=Alireza%20Mohammadian%20Kia"> Alireza Mohammadian Kia</a>, <a href="https://publications.waset.org/abstracts/search?q=Benjamin%20Uhlig"> Benjamin Uhlig</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This investigation aims to develop the feasible and qualitative process parameters for the thin films fabrication into ultra-large through-silicon-vias (TSVs) as vertical interconnections. The focus of the study is on TSV metallization and its challenges employing new materials for the purpose of rapid signal propagation in the microsystems technology. Cobalt metal-organic chemical vapor deposition (Co-MOCVD) process enables manufacturing an adhesive and excellent conformal ultra-thin film all the way through TSVs in comparison with the conventional non-conformal physical vapor deposition (PVD) process of copper (Cu) seed layer. Therefore, this process provides a Cu seed-free layer which is capable of direct Cu electrochemical deposition (Cu-ECD) on top of it. The main challenge of this metallization module is to achieve the proper alternative seed layer with less roughness, sheet resistance and granular organic contamination (e.g. carbon) which intensify the Co corrosion under the influence of Cu electrolyte. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Cobalt%20MOCVD" title="Cobalt MOCVD">Cobalt MOCVD</a>, <a href="https://publications.waset.org/abstracts/search?q=direct%20Cu%20electrochemical%20deposition%20%28ECD%29" title=" direct Cu electrochemical deposition (ECD)"> direct Cu electrochemical deposition (ECD)</a>, <a href="https://publications.waset.org/abstracts/search?q=metallization%20technology" title=" metallization technology"> metallization technology</a>, <a href="https://publications.waset.org/abstracts/search?q=through-silicon-via%20%28TSV%29" title=" through-silicon-via (TSV)"> through-silicon-via (TSV)</a> </p> <a href="https://publications.waset.org/abstracts/96811/metal-organic-chemical-vapor-deposition-mocvd-process-investigation-for-co-thin-film-as-a-tsv-alternative-seed-layer" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/96811.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">158</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">58</span> Carbonaceous Monolithic Multi-Channel Denuders as a Gas-Particle Partitioning Tool for the Occupational Sampling of Aerosols from Semi-Volatile Organic Compounds</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Vesta%20Kohlmeier">Vesta Kohlmeier</a>, <a href="https://publications.waset.org/abstracts/search?q=George%20C.%20Dragan"> George C. Dragan</a>, <a href="https://publications.waset.org/abstracts/search?q=Juergen%20Orasche"> Juergen Orasche</a>, <a href="https://publications.waset.org/abstracts/search?q=Juergen%20Schnelle-Kreis"> Juergen Schnelle-Kreis</a>, <a href="https://publications.waset.org/abstracts/search?q=Dietmar%20Breuer"> Dietmar Breuer</a>, <a href="https://publications.waset.org/abstracts/search?q=Ralf%20Zimmermann"> Ralf Zimmermann</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Aerosols from hazardous semi-volatile organic compounds (SVOC) may occur in workplace air and can simultaneously be found as particle and gas phase. For health risk assessment, it is necessary to collect particles and gases separately. This can be achieved by using a denuder for the gas phase collection, combined with a filter and an adsorber for particle collection. The study focused on the suitability of carbonaceous monolithic multi-channel denuders, so-called Novacarb™-Denuders (MastCarbon International Ltd., Guilford, UK), to achieve gas-particle separation. Particle transmission efficiency experiments were performed with polystyrene latex (PSL) particles (size range 0.51-3 µm), while the time dependent gas phase collection efficiency was analysed for polar and nonpolar SVOC (mass concentrations 7-10 mg/m3) over 2 h at 5 or 10 l/min. The experimental gas phase collection efficiency was also compared with theoretical predictions. For n-hexadecane (C16), the gas phase collection efficiency was max. 91 % for one denuder and max. 98 % for two denuders, while for diethylene glycol (DEG), a maximal gas phase collection efficiency of 93 % for one denuder and 97 % for two denuders was observed. At 5 l/min higher gas phase collection efficiencies were achieved than at 10 l/min. The deviations between the theoretical and experimental gas phase collection efficiencies were up to 5 % for C16 and 23 % for DEG. Since the theoretical efficiency depends on the geometric shape and length of the denuder, flow rate and diffusion coefficients of the tested substances, the obtained values define an upper limit which could be reached. Regarding the particle transmission through the denuders, the use of one denuder showed transmission efficiencies around 98 % for 1-3 µm particle diameters. The use of three denuders resulted in transmission efficiencies from 93-97 % for the same particle sizes. In summary, NovaCarb™-Denuders are well applicable for sampling aerosols of polar/nonpolar substances with particle diameters ≤3 µm and flow rates of 5 l/min or lower. These properties and their compact size make them suitable for use in personal aerosol samplers. This work is supported by the German Social Accident Insurance (DGUV), research contract FP371. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=gas%20phase%20collection%20efficiency" title="gas phase collection efficiency">gas phase collection efficiency</a>, <a href="https://publications.waset.org/abstracts/search?q=particle%20transmission" title=" particle transmission"> particle transmission</a>, <a href="https://publications.waset.org/abstracts/search?q=personal%20aerosol%20sampler" title=" personal aerosol sampler"> personal aerosol sampler</a>, <a href="https://publications.waset.org/abstracts/search?q=SVOC" title=" SVOC"> SVOC</a> </p> <a href="https://publications.waset.org/abstracts/86966/carbonaceous-monolithic-multi-channel-denuders-as-a-gas-particle-partitioning-tool-for-the-occupational-sampling-of-aerosols-from-semi-volatile-organic-compounds" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/86966.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">176</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">57</span> The Hybridization of Muslim Spaces in Germany: A Historical Perspective on the Perception of Muslims</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Alex%20Konrad">Alex Konrad</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In 2017, about 4.5 million Muslims live in Germany. They can practice their faith openly, mostly in well-equipped community centers. At the same time, right-wing politicians and media allege that all Muslims tend to be radical and undemocratic. Both perspectives are rooted in an interacting development since the 1970s. German authorities closed the 'King Fahd Academy' international school in Bonn in summer 2017 because they accused the school administration of attracting Islamists. Only 30 years ago, German authorities and labor unions directed their requests for pastoral care of the Muslim communities in Germany to the Turkish and Saudi administrations. This study shows the leading and misleading tracks of Muslim life and its perception in Germany from a historical point of view. Most of the Muslims came as so-called 'Gastarbeiter' (migrant workers) from Turkey and Morocco to West Germany in the 1960s and 1970s. Until the late 1970s, German society recognized them as workforce solely and ignored their religious needs broadly. The Iranian Revolution of 1979 caused widespread hysteria about Islamic radicalization. Likewise, it shifted the German perception of migrant workers in Germany. For the first time, the majority society saw them as religious people. Media and self-proclaimed 'experts' on Islam suspected Muslims in Germany of subversive and undemocratic belief. On the upside, they obtained the opportunity to be heard by German society and authorities. In the ensuing decades, Muslims and Islamophiles fought a discursive struggle against right-wing politicians, 'experts' and media with monolithic views. In the 1990s, Muslims achieved to establish a solid infrastructure of Islamic community center throughout Germany. Their religious life became present and contributed to diversifying the common monolithic images of Muslims as insane fundamentalists in Germany. However, the media and many 'experts' promoted the fundamentalist narrative, which gained more and more acceptance in German society at the same time. This study uses archival sources from German authorities, Islamic communities, together with local and national media to get a close approach to the contemporary historical debates. In addition, contributions by Muslims and Islamophiles in Germany, for example in magazines, event reports, and internal communication, revealing their quotidian struggle for more acceptance are being used as sources. The inclusion of widely publicized books, documentaries and newspaper articles about Islam as a menace to Europe conduces to a balanced analysis of the contemporary debates and views. Theoretically, the study applies the Third Space approach. Muslims in Germany fight the othering by the German majority society. It was their chief purpose not to be marginalized in both spatial meanings, discursively and physically. Therefore, they established realities of life as hybrids in Germany. This study reconstructs the development of the perception of Muslims in Germany. It claims that self-proclaimed experts and politicians with monolithic views maintained the hegemonic discursive positions and coined the German images of Muslims. Nevertheless, Muslims in Germany accomplished that Muslim presence in Germany’s everyday life became an integral part of society and the public sphere. This is how Muslims hybridized religious spaces in Germany. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=experts" title="experts">experts</a>, <a href="https://publications.waset.org/abstracts/search?q=fundamentalism" title=" fundamentalism"> fundamentalism</a>, <a href="https://publications.waset.org/abstracts/search?q=Germany" title=" Germany"> Germany</a>, <a href="https://publications.waset.org/abstracts/search?q=hybridization" title=" hybridization"> hybridization</a>, <a href="https://publications.waset.org/abstracts/search?q=Islamophobia" title=" Islamophobia"> Islamophobia</a>, <a href="https://publications.waset.org/abstracts/search?q=migrant%20workers" title=" migrant workers"> migrant workers</a> </p> <a href="https://publications.waset.org/abstracts/83868/the-hybridization-of-muslim-spaces-in-germany-a-historical-perspective-on-the-perception-of-muslims" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/83868.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">226</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">56</span> Monolithic Integrated GaN Resonant Tunneling Diode Pair with Picosecond Switching Time for High-speed Multiple-valued Logic System</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Fang%20Liu">Fang Liu</a>, <a href="https://publications.waset.org/abstracts/search?q=JiaJia%20Yao"> JiaJia Yao</a>, <a href="https://publications.waset.org/abstracts/search?q=GuanLin%20Wu"> GuanLin Wu</a>, <a href="https://publications.waset.org/abstracts/search?q=ZuMaoLi"> ZuMaoLi</a>, <a href="https://publications.waset.org/abstracts/search?q=XueYan%20Yang"> XueYan Yang</a>, <a href="https://publications.waset.org/abstracts/search?q=HePeng%20Zhang"> HePeng Zhang</a>, <a href="https://publications.waset.org/abstracts/search?q=ZhiPeng%20Sun"> ZhiPeng Sun</a>, <a href="https://publications.waset.org/abstracts/search?q=JunShuai%20Xue"> JunShuai Xue</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The explosive increasing needs of data processing and information storage strongly drive the advancement of the binary logic system to multiple-valued logic system. Inherent negative differential resistance characteristic, ultra-high-speed switching time, and robust anti-irradiation capability make III-nitride resonant tunneling diode one of the most promising candidates for multi-valued logic devices. Here we report the monolithic integration of GaN resonant tunneling diodes in series to realize multiple negative differential resistance regions, obtaining at least three stable operating states. A multiply-by-three circuit is achieved by this combination, increasing the frequency of the input triangular wave from f0 to 3f0. The resonant tunneling diodes are grown by plasma-assistedmolecular beam epitaxy on free-standing c-plane GaN substrates, comprising double barriers and a single quantum well both at the atomic level. Device with a peak current density of 183kA/cm² in conjunction with a peak-to-valley current ratio (PVCR) of 2.07 is observed, which is the best result reported in nitride-based resonant tunneling diodes. Microwave oscillation event at room temperature was discovered with a fundamental frequency of 0.31GHz and an output power of 5.37μW, verifying the high repeatability and robustness of our device. The switching behavior measurement was successfully carried out, featuring rise and fall times in the order of picoseconds, which can be used in high-speed digital circuits. Limited by the measuring equipment and the layer structure, the switching time can be further improved. In general, this article presents a novel nitride device with multiple negative differential regions driven by the resonant tunneling mechanism, which can be used in high-speed multiple value logic field with reduced circuit complexity, demonstrating a new solution of nitride devices to break through the limitations of binary logic. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=GaN%20resonant%20tunneling%20diode" title="GaN resonant tunneling diode">GaN resonant tunneling diode</a>, <a href="https://publications.waset.org/abstracts/search?q=negative%20differential%20resistance" title=" negative differential resistance"> negative differential resistance</a>, <a href="https://publications.waset.org/abstracts/search?q=multiple-valued%20logic%20system" title=" multiple-valued logic system"> multiple-valued logic system</a>, <a href="https://publications.waset.org/abstracts/search?q=switching%20time" title=" switching time"> switching time</a>, <a href="https://publications.waset.org/abstracts/search?q=peak-to-valley%20current%20ratio" title=" peak-to-valley current ratio"> peak-to-valley current ratio</a> </p> <a href="https://publications.waset.org/abstracts/157992/monolithic-integrated-gan-resonant-tunneling-diode-pair-with-picosecond-switching-time-for-high-speed-multiple-valued-logic-system" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/157992.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">100</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">55</span> Experimental Investigation on Mechanical Properties of Rice Husk Filled Jute Reinforced Composites</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Priyankar%20P.%20Deka">Priyankar P. Deka</a>, <a href="https://publications.waset.org/abstracts/search?q=Sutanu%20Samanta"> Sutanu Samanta</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper describes the development of new class of epoxy based hybrid composites reinforced with jute and filled with rice husk flour. Rice husk flour is added in 0%, 1%, 3%, 5% by weight. Epoxy resin and triethylene tetramine (T.E.T.A) is used as matrix and hardener respectively. It investigates the mechanical properties of the composites and a comparison is done for monolithic jute composite and the filled ones. The specimens are prepared according to the ASTM standards and experimentation is carried out using INSTRON 8801. The result shows that with the increase of filler percentage the tensile properties increases but compressive and flexural properties decreases. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=jute" title="jute">jute</a>, <a href="https://publications.waset.org/abstracts/search?q=mechanical%20characterization" title=" mechanical characterization"> mechanical characterization</a>, <a href="https://publications.waset.org/abstracts/search?q=natural%20fiber" title=" natural fiber"> natural fiber</a>, <a href="https://publications.waset.org/abstracts/search?q=rice%20husk" title=" rice husk"> rice husk</a> </p> <a href="https://publications.waset.org/abstracts/37807/experimental-investigation-on-mechanical-properties-of-rice-husk-filled-jute-reinforced-composites" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/37807.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">285</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">54</span> Flip-Chip Bonding for Monolithic of Matrix-Addressable GaN-Based Micro-Light-Emitting Diodes Array</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Chien-Ju%20Chen">Chien-Ju Chen</a>, <a href="https://publications.waset.org/abstracts/search?q=Chia-Jui%20Yu"> Chia-Jui Yu</a>, <a href="https://publications.waset.org/abstracts/search?q=Jyun-Hao%20Liao"> Jyun-Hao Liao</a>, <a href="https://publications.waset.org/abstracts/search?q=Chia-Ching%20Wu"> Chia-Ching Wu</a>, <a href="https://publications.waset.org/abstracts/search?q=Meng-Chyi%20Wu"> Meng-Chyi Wu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A 64 × 64 GaN-based micro-light-emitting diode array (μLEDA) with 20 μm in pixel size and 40 μm in pitch by flip-chip bonding (FCB) is demonstrated in this study. Besides, an underfilling (UF) technology is applied to the process for improving the uniformity of device. With those configurations, good characteristics are presented, operation voltage and series resistance of a pixel in the 450 nm flip chip μLEDA are 2.89 V and 1077Ω (4.3 mΩ-cm²) at 25 A/cm², respectively. The μLEDA can sustain higher current density compared to conventional LED, and the power of the device is 9.5 μW at 100 μA and 0.42 mW at 20 mA. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=GaN" title="GaN">GaN</a>, <a href="https://publications.waset.org/abstracts/search?q=micro-light-emitting%20diode%20array%28%CE%BCLEDA%29" title=" micro-light-emitting diode array(μLEDA)"> micro-light-emitting diode array(μLEDA)</a>, <a href="https://publications.waset.org/abstracts/search?q=flip-chip%20bonding" title=" flip-chip bonding"> flip-chip bonding</a>, <a href="https://publications.waset.org/abstracts/search?q=underfilling" title=" underfilling"> underfilling</a> </p> <a href="https://publications.waset.org/abstracts/73765/flip-chip-bonding-for-monolithic-of-matrix-addressable-gan-based-micro-light-emitting-diodes-array" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/73765.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">423</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">53</span> Warning about the Risk of Blood Flow Stagnation after Transcatheter Aortic Valve Implantation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Aymen%20Laadhari">Aymen Laadhari</a>, <a href="https://publications.waset.org/abstracts/search?q=G%C3%A1bor%20Sz%C3%A9kely"> Gábor Székely</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this work, the hemodynamics in the sinuses of Valsalva after Transcatheter Aortic Valve Implantation is numerically examined. We focus on the physical results in the two-dimensional case. We use a finite element methodology based on a Lagrange multiplier technique that enables to couple the dynamics of blood flow and the leaflets’ movement. A massively parallel implementation of a monolithic and fully implicit solver allows more accuracy and significant computational savings. The elastic properties of the aortic valve are disregarded, and the numerical computations are performed under physiologically correct pressure loads. Computational results depict that blood flow may be subject to stagnation in the lower domain of the sinuses of Valsalva after Transcatheter Aortic Valve Implantation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=hemodynamics" title="hemodynamics">hemodynamics</a>, <a href="https://publications.waset.org/abstracts/search?q=simulations" title=" simulations"> simulations</a>, <a href="https://publications.waset.org/abstracts/search?q=stagnation" title=" stagnation"> stagnation</a>, <a href="https://publications.waset.org/abstracts/search?q=valve" title=" valve"> valve</a> </p> <a href="https://publications.waset.org/abstracts/63534/warning-about-the-risk-of-blood-flow-stagnation-after-transcatheter-aortic-valve-implantation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/63534.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">291</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">52</span> The Design, Development, and Optimization of a Capacitive Pressure Sensor Utilizing an Existing 9DOF Platform</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Andrew%20Randles">Andrew Randles</a>, <a href="https://publications.waset.org/abstracts/search?q=Ilker%20Ocak"> Ilker Ocak</a>, <a href="https://publications.waset.org/abstracts/search?q=Cheam%20Daw%20Don"> Cheam Daw Don</a>, <a href="https://publications.waset.org/abstracts/search?q=Navab%20Singh"> Navab Singh</a>, <a href="https://publications.waset.org/abstracts/search?q=Alex%20Gu"> Alex Gu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Nine Degrees of Freedom (9 DOF) systems are already in development in many areas. In this paper, an integrated pressure sensor is proposed that will make use of an already existing monolithic 9 DOF inertial MEMS platform. Capacitive pressure sensors can suffer from limited sensitivity for a given size of membrane. This novel pressure sensor design increases the sensitivity by over 5 times compared to a traditional array of square diaphragms while still fitting within a 2 mm x 2 mm chip and maintaining a fixed static capacitance. The improved design uses one large diaphragm supported by pillars with fixed electrodes placed above the areas of maximum deflection. The design optimization increases the sensitivity from 0.22 fF/kPa to 1.16 fF/kPa. Temperature sensitivity was also examined through simulation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=capacitive%20pressure%20sensor" title="capacitive pressure sensor">capacitive pressure sensor</a>, <a href="https://publications.waset.org/abstracts/search?q=9%20DOF" title=" 9 DOF"> 9 DOF</a>, <a href="https://publications.waset.org/abstracts/search?q=10%20DOF" title=" 10 DOF"> 10 DOF</a>, <a href="https://publications.waset.org/abstracts/search?q=sensor" title=" sensor"> sensor</a>, <a href="https://publications.waset.org/abstracts/search?q=capacitive" title=" capacitive"> capacitive</a>, <a href="https://publications.waset.org/abstracts/search?q=inertial%20measurement%20unit" title=" inertial measurement unit"> inertial measurement unit</a>, <a href="https://publications.waset.org/abstracts/search?q=IMU" title=" IMU"> IMU</a>, <a href="https://publications.waset.org/abstracts/search?q=inertial%20navigation%20system" title=" inertial navigation system"> inertial navigation system</a>, <a href="https://publications.waset.org/abstracts/search?q=INS" title=" INS"> INS</a> </p> <a href="https://publications.waset.org/abstracts/32117/the-design-development-and-optimization-of-a-capacitive-pressure-sensor-utilizing-an-existing-9dof-platform" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/32117.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">547</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">51</span> An Implicit Methodology for the Numerical Modeling of Locally Inextensible Membranes</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Aymen%20Laadhari">Aymen Laadhari</a> </p> <p class="card-text"><strong>Abstract:</strong></p> We present in this paper a fully implicit finite element method tailored for the numerical modeling of inextensible fluidic membranes in a surrounding Newtonian fluid. We consider a highly simplified version of the Canham-Helfrich model for phospholipid membranes, in which the bending force and spontaneous curvature are disregarded. The coupled problem is formulated in a fully Eulerian framework and the membrane motion is tracked using the level set method. The resulting nonlinear problem is solved by a Newton-Raphson strategy, featuring a quadratic convergence behavior. A monolithic solver is implemented, and we report several numerical experiments aimed at model validation and illustrating the accuracy of the proposed method. We show that stability is maintained for significantly larger time steps with respect to an explicit decoupling method. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=finite%20element%20method" title="finite element method">finite element method</a>, <a href="https://publications.waset.org/abstracts/search?q=level%20set" title=" level set"> level set</a>, <a href="https://publications.waset.org/abstracts/search?q=Newton" title=" Newton"> Newton</a>, <a href="https://publications.waset.org/abstracts/search?q=membrane" title=" membrane"> membrane</a> </p> <a href="https://publications.waset.org/abstracts/59571/an-implicit-methodology-for-the-numerical-modeling-of-locally-inextensible-membranes" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/59571.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">330</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">50</span> Electrical Degradation of GaN-based p-channel HFETs Under Dynamic Electrical Stress</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Xuerui%20Niu">Xuerui Niu</a>, <a href="https://publications.waset.org/abstracts/search?q=Bolin%20Wang"> Bolin Wang</a>, <a href="https://publications.waset.org/abstracts/search?q=Xinchuang%20Zhang"> Xinchuang Zhang</a>, <a href="https://publications.waset.org/abstracts/search?q=Xiaohua%20Ma"> Xiaohua Ma</a>, <a href="https://publications.waset.org/abstracts/search?q=Bin%20Hou"> Bin Hou</a>, <a href="https://publications.waset.org/abstracts/search?q=Ling%20Yang"> Ling Yang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The application of discrete GaN-based power switches requires the collaboration of silicon-based peripheral circuit structures. However, the packages and interconnection between the Si and GaN devices can introduce parasitic effects to the circuit, which has great impacts on GaN power transistors. GaN-based monolithic power integration technology is an emerging solution which can improve the stability of circuits and allow the GaN-based devices to achieve more functions. Complementary logic circuits consisting of GaN-based E-mode p-channel heterostructure field-effect transistors (p-HFETs) and E-mode n-channel HEMTs can be served as the gate drivers. E-mode p-HFETs with recessed gate have attracted increasing interest because of the low leakage current and large gate swing. However, they suffer from a poor interface between the gate dielectric and polarized nitride layers. The reliability of p-HFETs is analyzed and discussed in this work. In circuit applications, the inverter is always operated with dynamic gate voltage (VGS) rather than a constant VGS. Therefore, dynamic electrical stress has been simulated to resemble the operation conditions for E-mode p-HFETs. The dynamic electrical stress condition is as follows. VGS is a square waveform switching from -5 V to 0 V, VDS is fixed, and the source grounded. The frequency of the square waveform is 100kHz with the rising/falling time of 100 ns and duty ratio of 50%. The effective stress time is 1000s. A number of stress tests are carried out. The stress was briefly interrupted to measure the linear IDS-VGS, saturation IDS-VGS, As VGS switches from -5 V to 0 V and VDS = 0 V, devices are under negative-bias-instability (NBI) condition. Holes are trapped at the interface of oxide layer and GaN channel layer, which results in the reduction of VTH. The negative shift of VTH is serious at the first 10s and then changes slightly with the following stress time. However, different phenomenon is observed when VDS reduces to -5V. VTH shifts negatively during stress condition, and the variation in VTH increases with time, which is different from that when VDS is 0V. Two mechanisms exists in this condition. On the one hand, the electric field in the gate region is influenced by the drain voltage, so that the trapping behavior of holes in the gate region changes. The impact of the gate voltage is weakened. On the other hand, large drain voltage can induce the hot holes generation and lead to serious hot carrier stress (HCS) degradation with time. The poor-quality interface between the oxide layer and GaN channel layer at the gate region makes a major contribution to the high-density interface traps, which will greatly influence the reliability of devices. These results emphasize that the improved etching and pretreatment processes needs to be developed so that high-performance GaN complementary logics with enhanced stability can be achieved. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=GaN-based%20E-mode%20p-HFETs" title="GaN-based E-mode p-HFETs">GaN-based E-mode p-HFETs</a>, <a href="https://publications.waset.org/abstracts/search?q=dynamic%20electric%20stress" title=" dynamic electric stress"> dynamic electric stress</a>, <a href="https://publications.waset.org/abstracts/search?q=threshold%20voltage" title=" threshold voltage"> threshold voltage</a>, <a href="https://publications.waset.org/abstracts/search?q=monolithic%20power%20integration%20technology" title=" monolithic power integration technology"> monolithic power integration technology</a> </p> <a href="https://publications.waset.org/abstracts/159834/electrical-degradation-of-gan-based-p-channel-hfets-under-dynamic-electrical-stress" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/159834.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">93</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">49</span> A Low-Power, Low-Noise and High Linearity 60 GHz LNA for WPAN Applications</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Noha%20Al%20Majid">Noha Al Majid</a>, <a href="https://publications.waset.org/abstracts/search?q=Said%20Mazer"> Said Mazer</a>, <a href="https://publications.waset.org/abstracts/search?q=Moulhime%20El%20Bekkali"> Moulhime El Bekkali</a>, <a href="https://publications.waset.org/abstracts/search?q=Catherine%20Algani"> Catherine Algani</a>, <a href="https://publications.waset.org/abstracts/search?q=Mahmoud%20Mehdi"> Mahmoud Mehdi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A low noise figure (NF) and high linearity V-band Low Noise Amplifier (LNA) is reported in this article. The LNA compromises a three-stage cascode configuration. This LNA will be used as a part of a WPAN (Wireless Personal Area Network) receiver in the millimeter-wave band at 60 GHz. It is designed according to the MMIC technology (Monolithic Microwave Integrated Circuit) in PH 15 process from UMS foundry and uses a 0.15 μm GaAs PHEMT (Pseudomorphic High Electron Mobility Transistor). The particularity of this LNA compared to other LNAs in literature is its very low noise figure which is equal to 1 dB and its high linearity (IIP3 is about 22 dB). The LNA consumes 0.24 Watts, achieving a high gain which is about 23 dB, an input return loss better than -10 dB and an output return loss better than -8 dB. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=low%20noise%20amplifier" title="low noise amplifier">low noise amplifier</a>, <a href="https://publications.waset.org/abstracts/search?q=V-band" title=" V-band"> V-band</a>, <a href="https://publications.waset.org/abstracts/search?q=MMIC%20technology" title=" MMIC technology"> MMIC technology</a>, <a href="https://publications.waset.org/abstracts/search?q=LNA" title=" LNA"> LNA</a>, <a href="https://publications.waset.org/abstracts/search?q=amplifier" title=" amplifier"> amplifier</a>, <a href="https://publications.waset.org/abstracts/search?q=cascode" title=" cascode"> cascode</a>, <a href="https://publications.waset.org/abstracts/search?q=pseudomorphic%20high%20electron%20mobility%20transistor%20%28PHEMT%29" title=" pseudomorphic high electron mobility transistor (PHEMT)"> pseudomorphic high electron mobility transistor (PHEMT)</a>, <a href="https://publications.waset.org/abstracts/search?q=high%20linearity" title=" high linearity"> high linearity</a> </p> <a href="https://publications.waset.org/abstracts/26198/a-low-power-low-noise-and-high-linearity-60-ghz-lna-for-wpan-applications" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/26198.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">515</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">48</span> Postcolonialism and Feminist Dialogics: Re-Imaging Cultural Exclusion in the Nigerian Feminist Fiction</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Muhammad%20Dahiru">Muhammad Dahiru</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A contestable polemic in postcolonialism is the Western Universalist conception of the people of a vast continent such as Africa as homogenous. Quite often, the postcolonial African woman is seen as an entity in western cultural and literary feminist theorisations. The debate between the so-called western feminist scholarship and the postcolonial/third world feminists that began in the late 1980s focuses on this universalisation of women’s concerns as monolithic. This article argues that the universalising assumption that all women share similar concerns in not only Africa as a continent but even in Nigeria as a country is misleading because of cultural differences. The article is a dialogic reading of Nigerian literature arguing that there is no culturally normative perspective on Nigerian feminist fiction because of the multifaceted and multicultural concerns of women writers from the different cultural regions in the country. The article concludes that this can better be read and appreciated through the lens of M. M. Bakhtin’s theory of dialogism. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cultural%20exclusion" title="cultural exclusion">cultural exclusion</a>, <a href="https://publications.waset.org/abstracts/search?q=dialogics" title=" dialogics"> dialogics</a>, <a href="https://publications.waset.org/abstracts/search?q=Nigerian%20feminist%20fiction" title=" Nigerian feminist fiction"> Nigerian feminist fiction</a>, <a href="https://publications.waset.org/abstracts/search?q=postcolonialism" title=" postcolonialism"> postcolonialism</a> </p> <a href="https://publications.waset.org/abstracts/102670/postcolonialism-and-feminist-dialogics-re-imaging-cultural-exclusion-in-the-nigerian-feminist-fiction" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/102670.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">207</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">47</span> Strengthening and Toughening of Dental Porcelain by the Inclusion of an Yttria-Stabilized Zirconia Reinforcing Phase</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Buno%20Henriques">Buno Henriques</a>, <a href="https://publications.waset.org/abstracts/search?q=Rafaela%20Santos"> Rafaela Santos</a>, <a href="https://publications.waset.org/abstracts/search?q=J%C3%BAlio%20Matias%20de%20Souza"> Júlio Matias de Souza</a>, <a href="https://publications.waset.org/abstracts/search?q=Filipe%20Silva"> Filipe Silva</a>, <a href="https://publications.waset.org/abstracts/search?q=Rubens%20Nascimento"> Rubens Nascimento</a>, <a href="https://publications.waset.org/abstracts/search?q=M%C3%A1rcio%20Fredel"> Márcio Fredel</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Dental porcelain composites reinforced and toughened by 20 wt.% tetragonal zirconia (3Y-TZP) were processed by hot pressing at 1000°C. Two types of particles were tested: yttria-stabilized zirconia (ZrO2–3%Y2O3) agglomerates and pre-sintered yttria-stabilized zirconia (ZrO2–3%Y2O3) particles. The composites as well as the reinforcing particles were analyzed by the means of optical and Scanning Electron Microscopy (SEM), Energy Dispersion Spectroscopy (EDS) and X-Ray Diffraction (XRD). The mechanical properties were obtained by the transverse rupture strength test, Vickers indentations and fracture toughness. Wear tests were also performed on the composites and monolithic porcelain. The best mechanical and wear results were displayed by the porcelain reinforced with the pre-sintered ZrO2–3%Y2O3 particles. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=dental%20restoration" title="dental restoration">dental restoration</a>, <a href="https://publications.waset.org/abstracts/search?q=zirconia" title=" zirconia"> zirconia</a>, <a href="https://publications.waset.org/abstracts/search?q=porcelain" title=" porcelain"> porcelain</a>, <a href="https://publications.waset.org/abstracts/search?q=composites" title=" composites"> composites</a>, <a href="https://publications.waset.org/abstracts/search?q=strengthening" title=" strengthening"> strengthening</a>, <a href="https://publications.waset.org/abstracts/search?q=toughening" title=" toughening"> toughening</a>, <a href="https://publications.waset.org/abstracts/search?q=wear" title=" wear"> wear</a> </p> <a 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