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Nashar</title> <meta name="description" content="Search results for: Philippe E. Nashar"> <meta name="keywords" content="Philippe E. Nashar"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button class="d-block d-lg-none navbar-toggler ml-auto" type="button" data-toggle="collapse" data-target="#navbarMenu" aria-controls="navbarMenu" aria-expanded="false" aria-label="Toggle navigation"> <span class="navbar-toggler-icon"></span> </button> <div class="w-100"> <div class="d-none d-lg-flex flex-row-reverse"> <form method="get" action="https://waset.org/search" class="form-inline my-2 my-lg-0"> <input class="form-control mr-sm-2" type="search" placeholder="Search Conferences" value="Philippe E. 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Nashar"> <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> 78</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: Philippe E. Nashar</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">78</span> Nucleophile Mediated Addition-Fragmentation Generation of Aryl Radicals from Aryl Diazonium Salts</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Elene%20Tatunashvili">Elene Tatunashvili</a>, <a href="https://publications.waset.org/abstracts/search?q=Bun%20Chan"> Bun Chan</a>, <a href="https://publications.waset.org/abstracts/search?q=Philippe%20E.%20Nashar"> Philippe E. Nashar</a>, <a href="https://publications.waset.org/abstracts/search?q=Christopher%20S.%20P.%20McErlean"> Christopher S. P. McErlean</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The reduction of aryl diazonium salts is one of the most efficient ways to generate aryl radicals for use in a wide range of transformations, including Sandmeyer-type reactions, Meerwein arylations of olefins and Gomberg-Bachmann-Hey arylations of heteroaromatic systems. The aryl diazonium species can be reduced electrochemically, by UV irradiation, inner-sphere and outer-sphere single electron transfer processes (SET) from metal salts, SET from photo-excited organic catalysts or fragmentation of adducts with weak bases (acetate, hydroxide, etc.). This paper details an approach for the metal-free reduction of aryl diazonium salts, which facilitates the efficient synthesis of various aromatic compounds under exceedingly mild reaction conditions. By measuring the oxidation potential of a number of organic molecules, a series of nucleophiles were identified that reduce aryl diazonium salts via the addition-fragmentation mechanism. This approach leads to unprecedented operational simplicity: The reactions are very rapid and proceed in the open air; there is no need for external irradiation or heating, and the process is compatible with a large number of radical reactions. We illustrate these advantages by using the addition-fragmentation strategy to regioselectively arylate a series of heterocyclic compounds, to synthesize ketones by arylation of silyl enol ethers, and to synthesize benzothiophene and phenanthrene derivatives by radical annulation reactions. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=diazonium%20salts" title="diazonium salts">diazonium salts</a>, <a href="https://publications.waset.org/abstracts/search?q=hantzsch%20esters" title=" hantzsch esters"> hantzsch esters</a>, <a href="https://publications.waset.org/abstracts/search?q=oxygen" title=" oxygen"> oxygen</a>, <a href="https://publications.waset.org/abstracts/search?q=radical%20reactions" title=" radical reactions"> radical reactions</a>, <a href="https://publications.waset.org/abstracts/search?q=synthetic%20methods" title=" synthetic methods"> synthetic methods</a> </p> <a href="https://publications.waset.org/abstracts/112892/nucleophile-mediated-addition-fragmentation-generation-of-aryl-radicals-from-aryl-diazonium-salts" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/112892.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">149</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">77</span> Convergence or Divergence of Economic Growth within the ASEAN Community: Challenges for the AEC</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Philippe%20Gugler">Philippe Gugler</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This contribution reflects some important questions regarding inter alia the economic development occurring in the light of the ASEAN’s goal of creating the ASEAN Economic Community (AEC) by 2015. We observe a continuing economic growth of GDP per capita over recent years despite the negative effects of the world economic crisis. IMF forecasts indicate that this trend will continue. The paper focuses on the analysis and comparison of economic growth trends of ASEAN countries. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ASEAN" title="ASEAN">ASEAN</a>, <a href="https://publications.waset.org/abstracts/search?q=convergence" title=" convergence"> convergence</a>, <a href="https://publications.waset.org/abstracts/search?q=divergence" title=" divergence"> divergence</a>, <a href="https://publications.waset.org/abstracts/search?q=economic%20growth" title=" economic growth"> economic growth</a>, <a href="https://publications.waset.org/abstracts/search?q=globalization" title=" globalization"> globalization</a>, <a href="https://publications.waset.org/abstracts/search?q=integration" title=" integration"> integration</a> </p> <a href="https://publications.waset.org/abstracts/25809/convergence-or-divergence-of-economic-growth-within-the-asean-community-challenges-for-the-aec" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/25809.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">518</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">76</span> Experimental Study on Friction Factor of Oscillating Flow Through a Regenerator</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Sa%C3%AFd%20Kahaleras">Mohamed Saïd Kahaleras</a>, <a href="https://publications.waset.org/abstracts/search?q=Fran%C3%A7ois%20Lanzetta"> François Lanzetta</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Khan"> Mohamed Khan</a>, <a href="https://publications.waset.org/abstracts/search?q=Guillaume%20Layes"> Guillaume Layes</a>, <a href="https://publications.waset.org/abstracts/search?q=Philippe%20Nika"> Philippe Nika</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper presents an experimental work to characterize the dynamic operation of a metal regenerator crossed by dry compressible air alternating flow. Unsteady dynamic measurements concern the pressure, velocity and temperature of the gas at the ends and inside the channels of the regenerator. The regenerators are tested under isothermal conditions and thermal axial temperature gradient. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=friction%20factor" title="friction factor">friction factor</a>, <a href="https://publications.waset.org/abstracts/search?q=oscillating%20flow" title=" oscillating flow"> oscillating flow</a>, <a href="https://publications.waset.org/abstracts/search?q=regenerator" title=" regenerator"> regenerator</a>, <a href="https://publications.waset.org/abstracts/search?q=stirling%20machine" title=" stirling machine"> stirling machine</a> </p> <a href="https://publications.waset.org/abstracts/2336/experimental-study-on-friction-factor-of-oscillating-flow-through-a-regenerator" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/2336.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">508</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> Thermal Modelling and Experimental Comparison for a Moving Pantograph Strip</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nicolas%20Delcey">Nicolas Delcey</a>, <a href="https://publications.waset.org/abstracts/search?q=Philippe%20Baucour"> Philippe Baucour</a>, <a href="https://publications.waset.org/abstracts/search?q=Didier%20Chamagne"> Didier Chamagne</a>, <a href="https://publications.waset.org/abstracts/search?q=Genevi%C3%A8ve%20Wimmer"> Geneviève Wimmer</a>, <a href="https://publications.waset.org/abstracts/search?q=Auditeau%20G%C3%A9rard"> Auditeau Gérard</a>, <a href="https://publications.waset.org/abstracts/search?q=Bausseron%20Thomas"> Bausseron Thomas</a>, <a href="https://publications.waset.org/abstracts/search?q=Bouger%20Odile"> Bouger Odile</a>, <a href="https://publications.waset.org/abstracts/search?q=Blanvillain%20G%C3%A9rard"> Blanvillain Gérard</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper proposes a thermal study of the catenary/pantograph interface for a train in motion. A 2.5D complex model of the pantograph strip has been defined and created by a coupling between a 1D and a 2D model. Experimental and simulation results are presented and with a comparison allow validating the 2.5D model. Some physical phenomena are described and presented with the help of the model such as the stagger motion thermal effect, particular heats and the effect of the material characteristics. Finally it is possible to predict the critical thermal configuration during a train trip. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=electro-thermal%20studies" title="electro-thermal studies">electro-thermal studies</a>, <a href="https://publications.waset.org/abstracts/search?q=mathematical%20optimizations" title=" mathematical optimizations"> mathematical optimizations</a>, <a href="https://publications.waset.org/abstracts/search?q=multi-physical%20approach" title=" multi-physical approach"> multi-physical approach</a>, <a href="https://publications.waset.org/abstracts/search?q=numerical%20model" title=" numerical model"> numerical model</a>, <a href="https://publications.waset.org/abstracts/search?q=pantograph%20strip%20wear" title=" pantograph strip wear"> pantograph strip wear</a> </p> <a href="https://publications.waset.org/abstracts/63675/thermal-modelling-and-experimental-comparison-for-a-moving-pantograph-strip" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/63675.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">327</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">74</span> Chemical Modification of PVC and Its Surface Analysis by Means of XPS and Contact Angle Measurements</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ali%20Akrmi">Ali Akrmi</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Beji"> Mohamed Beji</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20Baklouti"> Ahmed Baklouti</a>, <a href="https://publications.waset.org/abstracts/search?q=Fatma%20Djouani"> Fatma Djouani</a>, <a href="https://publications.waset.org/abstracts/search?q=Philippe%20Lang"> Philippe Lang</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20M.%20Chehimi"> Mohamed M. Chehimi </a> </p> <p class="card-text"><strong>Abstract:</strong></p> Poly(vinyl chloride) (PVC) is a highly versatile polymer with excellent balance of properties and numerous applications such as water pipes, packaging and polymer materials of importance in the biomedical sector. However, depending on the applications, it is necessary to modify PVC by mixing with a plasticizer; surface modification using plasma, surface grafting or flame treatment; or bulk chemical modification which affects the entire PVC chains at an extent that can be tuned by the polymer chemist. The targeted applications are improvement of chemical resistance, avoiding or limitation of migration of toxic plasticizers, improvement of antibacterial properties, or control of blood compatibility. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=poly%28vinyl%20chloride%29" title="poly(vinyl chloride)">poly(vinyl chloride)</a>, <a href="https://publications.waset.org/abstracts/search?q=nucleophilic%20substitution" title=" nucleophilic substitution"> nucleophilic substitution</a>, <a href="https://publications.waset.org/abstracts/search?q=sulfonylcarbamates" title=" sulfonylcarbamates"> sulfonylcarbamates</a>, <a href="https://publications.waset.org/abstracts/search?q=XPS" title=" XPS"> XPS</a> </p> <a href="https://publications.waset.org/abstracts/13663/chemical-modification-of-pvc-and-its-surface-analysis-by-means-of-xps-and-contact-angle-measurements" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/13663.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">705</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> Effects of an Added Foaming Agent on Hydro-Mechanical Properties of Soil</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Moez%20Selmi">Moez Selmi</a>, <a href="https://publications.waset.org/abstracts/search?q=Mariem%20Kacem"> Mariem Kacem</a>, <a href="https://publications.waset.org/abstracts/search?q=Mehrez%20Jamei"> Mehrez Jamei</a>, <a href="https://publications.waset.org/abstracts/search?q=Philippe%20Dubujet"> Philippe Dubujet</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Earth pressure balance (EPB) tunnel boring machines are designed for digging in different types of soil, especially clay soils. This operation requires the treatment of soil by lubricants to facilitate the procedure of excavation. A possible use of this soil is limited by the effect of treatment on the hydro-mechanical properties of the soil. This work aims to study the effect of a foaming agent on the hydro-mechanical properties of clay soil. The injection of the foam agent in the soil leads to create a soil matrix in which they are incorporated gas bubbles. The state of the foam in the soil is scalable thanks to the degradation of the gas bubbles in the soil. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=EPB" title="EPB">EPB</a>, <a href="https://publications.waset.org/abstracts/search?q=clay%20soils" title=" clay soils"> clay soils</a>, <a href="https://publications.waset.org/abstracts/search?q=foam%20agent" title=" foam agent"> foam agent</a>, <a href="https://publications.waset.org/abstracts/search?q=hydro-mechanical%20properties" title=" hydro-mechanical properties"> hydro-mechanical properties</a>, <a href="https://publications.waset.org/abstracts/search?q=degradation" title=" degradation"> degradation</a> </p> <a href="https://publications.waset.org/abstracts/50150/effects-of-an-added-foaming-agent-on-hydro-mechanical-properties-of-soil" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/50150.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">370</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">72</span> Dynamic Response Analysis of Structure with Random Parameters</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20Guerine">Ahmed Guerine</a>, <a href="https://publications.waset.org/abstracts/search?q=Ali%20El%20Hafidi"> Ali El Hafidi</a>, <a href="https://publications.waset.org/abstracts/search?q=Bruno%20Martin"> Bruno Martin</a>, <a href="https://publications.waset.org/abstracts/search?q=Philippe%20Leclaire"> Philippe Leclaire</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, we propose a method for the dynamic response of multi-storey structures with uncertain-but-bounded parameters. The effectiveness of the proposed method is demonstrated by a numerical example of three-storey structures. This equation is integrated numerically using Newmark’s method. The numerical results are obtained by the proposed method. The simulation accounting the interval analysis method results are compared with a probabilistic approach results. The interval analysis method provides a mean curve that is between an upper and lower bound obtained from the probabilistic approach. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=multi-storey%20structure" title="multi-storey structure">multi-storey structure</a>, <a href="https://publications.waset.org/abstracts/search?q=dynamic%20response" title=" dynamic response"> dynamic response</a>, <a href="https://publications.waset.org/abstracts/search?q=interval%20analysis%20method" title=" interval analysis method"> interval analysis method</a>, <a href="https://publications.waset.org/abstracts/search?q=random%20parameters" title=" random parameters"> random parameters</a> </p> <a href="https://publications.waset.org/abstracts/142279/dynamic-response-analysis-of-structure-with-random-parameters" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/142279.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">190</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">71</span> Optimal Number of Reconfigurable Robots in a Transport System</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mari%20Chaikovskaia">Mari Chaikovskaia</a>, <a href="https://publications.waset.org/abstracts/search?q=Jean-Philippe%20Gayon"> Jean-Philippe Gayon</a>, <a href="https://publications.waset.org/abstracts/search?q=Alain%20Quilliot"> Alain Quilliot</a> </p> <p class="card-text"><strong>Abstract:</strong></p> We consider a fleet of elementary robots that can be connected in different ways to transport loads of different types. For instance, a single robot can transport a small load, and the association of two robots can either transport a large load or two small loads. We seek to determine the optimal number of robots to transport a set of loads in a given time interval, with or without reconfiguration. We show that the problem with reconfiguration is strongly NP-hard by a reduction to the bin-packing problem. Then, we study a special case with unit capacities and derive simple formulas for the minimum number of robots, up to 3 types of loads. For this special case, we compare the minimum number of robots with or without reconfiguration and show that the gain is limited in absolute value but may be significant for small fleets. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fleet%20sizing" title="fleet sizing">fleet sizing</a>, <a href="https://publications.waset.org/abstracts/search?q=reconfigurability" title=" reconfigurability"> reconfigurability</a>, <a href="https://publications.waset.org/abstracts/search?q=robots" title=" robots"> robots</a>, <a href="https://publications.waset.org/abstracts/search?q=transportation" title=" transportation"> transportation</a> </p> <a href="https://publications.waset.org/abstracts/160116/optimal-number-of-reconfigurable-robots-in-a-transport-system" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/160116.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">86</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> Nonlinear Dynamic Response of Helical Gear with Torque-Limiter</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20Guerine">Ahmed Guerine</a>, <a href="https://publications.waset.org/abstracts/search?q=Ali%20El%20Hafidi"> Ali El Hafidi</a>, <a href="https://publications.waset.org/abstracts/search?q=Bruno%20Martin"> Bruno Martin</a>, <a href="https://publications.waset.org/abstracts/search?q=Philippe%20Leclaire"> Philippe Leclaire</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper investigates the nonlinear dynamic response of a mechanical torque limiter which is used to protect drive parts from overload (helical transmission gears). The system is driven by four excitations: two external excitations (aerodynamics torque and force) and two internal excitations (two mesh stiffness fluctuations). In this work, we develop a dynamic model with lumped components and 28 degrees of freedom. We use the Runge Kutta step-by-step time integration numerical algorithm to solve the equations of motion obtained by Lagrange formalism. The numerical results have allowed us to identify the sources of vibration in the wind turbine. Also, they are useful to help the designer to make the right design and correctly choose the times for maintenance. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=two-stage%20helical%20gear" title="two-stage helical gear">two-stage helical gear</a>, <a href="https://publications.waset.org/abstracts/search?q=lumped%20model" title=" lumped model"> lumped model</a>, <a href="https://publications.waset.org/abstracts/search?q=dynamic%20response" title=" dynamic response"> dynamic response</a>, <a href="https://publications.waset.org/abstracts/search?q=torque-limiter" title=" torque-limiter"> torque-limiter</a> </p> <a href="https://publications.waset.org/abstracts/142306/nonlinear-dynamic-response-of-helical-gear-with-torque-limiter" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/142306.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">353</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> Highly Transparent, Hydrophobic and Self-Cleaning ZnO-Durazane Based Hybrid Organic-Inorganic Coatings</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Abderrahmane%20Hamdi">Abderrahmane Hamdi</a>, <a href="https://publications.waset.org/abstracts/search?q=Julie%20Chalon"> Julie Chalon</a>, <a href="https://publications.waset.org/abstracts/search?q=Benoit%20Dodin"> Benoit Dodin</a>, <a href="https://publications.waset.org/abstracts/search?q=Philippe%20Champagne"> Philippe Champagne</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this report, we present a simple route to realize robust, hydrophobic, and highly transparent coatings using organic polysilazane (durazane) and zinc oxide nanoparticles (ZnO). These coatings were deposited by spraying the mixture solution on glass slides. Thus, the properties of the films were characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), UV–vis-NIR spectrophotometer, and water contact angle method. This sprayable polymer mixed with ZnO nanoparticles shows high transparency for visible light > 90%, a hydrophobic character (CA > 90°), and good mechanical and chemical stability. The coating also demonstrates excellent self-cleaning properties, which makes it a promising candidate for commercial use. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=coatings" title="coatings">coatings</a>, <a href="https://publications.waset.org/abstracts/search?q=durability" title=" durability"> durability</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrophobicity" title=" hydrophobicity"> hydrophobicity</a>, <a href="https://publications.waset.org/abstracts/search?q=organic%20polysilazane" title=" organic polysilazane"> organic polysilazane</a>, <a href="https://publications.waset.org/abstracts/search?q=self-cleaning" title=" self-cleaning"> self-cleaning</a>, <a href="https://publications.waset.org/abstracts/search?q=transparence" title=" transparence"> transparence</a>, <a href="https://publications.waset.org/abstracts/search?q=zinc%20oxide%20nanoparticles" title=" zinc oxide nanoparticles"> zinc oxide nanoparticles</a> </p> <a href="https://publications.waset.org/abstracts/124131/highly-transparent-hydrophobic-and-self-cleaning-zno-durazane-based-hybrid-organic-inorganic-coatings" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/124131.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">170</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> French Keyboard Music Evolution from Baroque to Impressionism</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Parham%20Bakhtiari">Parham Bakhtiari</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The aesthetic characteristics of French keyboard music created during different time periods are examined through the utilization of compositional methods and the nurturing of specific musical styles. This article investigates the changes in style of keyboard compositions created by French musicians, starting from the initial stages from the mid-1700s to the early 1900s. It explores connections from the past and comparing the keyboard compositions of François Couperin and Jean-Philippe Rameau in the Baroque era to those of Gabriel Fauré, Claude Debussy, and Maurice Ravel in the Impressionist era. The evolution of keyboard music in France, particularly for the piano which was a new instrument at the time, was greatly influenced by the French revolution. Hence, we will delve into this topic further. The article examines the development of a specific French fashion trend of keyboard music that were composed during this time when there was an increasing emphasis on technical proficiency and expression of a fresh group of young French music creators. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=music" title="music">music</a>, <a href="https://publications.waset.org/abstracts/search?q=keyboard" title=" keyboard"> keyboard</a>, <a href="https://publications.waset.org/abstracts/search?q=baroque" title=" baroque"> baroque</a>, <a href="https://publications.waset.org/abstracts/search?q=impressionism" title=" impressionism"> impressionism</a>, <a href="https://publications.waset.org/abstracts/search?q=performance" title=" performance"> performance</a> </p> <a href="https://publications.waset.org/abstracts/186721/french-keyboard-music-evolution-from-baroque-to-impressionism" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/186721.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">44</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> Mean Velocity Modeling of Open-Channel Flow with Submerged Vegetation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mabrouka%20Morri">Mabrouka Morri</a>, <a href="https://publications.waset.org/abstracts/search?q=Amel%20Soualmia"> Amel Soualmia</a>, <a href="https://publications.waset.org/abstracts/search?q=Philippe%20Belleudy"> Philippe Belleudy</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Vegetation affects the mean and turbulent flow structure. It may increase flood risks and sediment transport. Therefore, it is important to develop analytical approaches for the bed shear stress on vegetated bed, to predict resistance caused by vegetation. In the recent years, experimental and numerical models have both been developed to model the effects of submerged vegetation on open-channel flow. In this paper, different analytic models are compared and tested using the criteria of deviation, to explore their capacity for predicting the mean velocity and select the suitable one that will be applied in real case of rivers. The comparison between the measured data in vegetated flume and simulated mean velocities indicated, a good performance, in the case of rigid vegetation, whereas, Huthoff model shows the best agreement with a high coefficient of determination (R2=80%) and the smallest error in the prediction of the average velocities. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=analytic%20models" title="analytic models">analytic models</a>, <a href="https://publications.waset.org/abstracts/search?q=comparison" title=" comparison"> comparison</a>, <a href="https://publications.waset.org/abstracts/search?q=mean%20velocity" title=" mean velocity"> mean velocity</a>, <a href="https://publications.waset.org/abstracts/search?q=vegetation" title=" vegetation"> vegetation</a> </p> <a href="https://publications.waset.org/abstracts/21381/mean-velocity-modeling-of-open-channel-flow-with-submerged-vegetation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/21381.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">276</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> Integrating Human Preferences into the Automated Decisions of Unmanned Aerial Vehicles</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Arwa%20Khannoussi">Arwa Khannoussi</a>, <a href="https://publications.waset.org/abstracts/search?q=Alexandru-Liviu%20Olteanu"> Alexandru-Liviu Olteanu</a>, <a href="https://publications.waset.org/abstracts/search?q=Pritesh%20Narayan"> Pritesh Narayan</a>, <a href="https://publications.waset.org/abstracts/search?q=Catherine%20Dezan"> Catherine Dezan</a>, <a href="https://publications.waset.org/abstracts/search?q=Jean-Philippe%20Diguet"> Jean-Philippe Diguet</a>, <a href="https://publications.waset.org/abstracts/search?q=Patrick%20Meyer"> Patrick Meyer</a>, <a href="https://publications.waset.org/abstracts/search?q=Jacques%20Petit-Frere"> Jacques Petit-Frere</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Due to the nature of autonomous Unmanned Aerial Vehicles (UAV) missions, it is important that the decisions of a UAV stay consistent with the priorities of an operator, while at the same time allowing them to be easily audited and explained. We propose a multi-layer decision engine that integrates the operator (human) preferences by using the Multi-Criteria Decision Aiding (MCDA) methods. A software implementation of a UAV simulator and of the decision engine is presented to highlight the advantage of using such techniques on high-level decisions. We demonstrate that, with such a preference-based decision engine, the decisions of the UAV are compatible with the priorities of the operator, which in turn increases her/his confidence in its autonomous behavior. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=autonomous%20UAV" title="autonomous UAV">autonomous UAV</a>, <a href="https://publications.waset.org/abstracts/search?q=multi-criteria%20decision%20aiding" title=" multi-criteria decision aiding"> multi-criteria decision aiding</a>, <a href="https://publications.waset.org/abstracts/search?q=multi-layers%20decision%20engine" title=" multi-layers decision engine"> multi-layers decision engine</a>, <a href="https://publications.waset.org/abstracts/search?q=operator%27s%20preferences" title=" operator's preferences"> operator's preferences</a>, <a href="https://publications.waset.org/abstracts/search?q=traceable%20decisions" title=" traceable decisions"> traceable decisions</a>, <a href="https://publications.waset.org/abstracts/search?q=UAV%20simulation" title=" UAV simulation"> UAV simulation</a> </p> <a href="https://publications.waset.org/abstracts/98229/integrating-human-preferences-into-the-automated-decisions-of-unmanned-aerial-vehicles" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/98229.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">255</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> Analysis of Sea Waves Characteristics and Assessment of Potential Wave Power in Egyptian Mediterranean Waters</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20A.%20El-Gindy">Ahmed A. El-Gindy</a>, <a href="https://publications.waset.org/abstracts/search?q=Elham%20S.%20El-Nashar"> Elham S. El-Nashar</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdallah%20Nafaa"> Abdallah Nafaa</a>, <a href="https://publications.waset.org/abstracts/search?q=Sameh%20El-Kafrawy"> Sameh El-Kafrawy</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The generation of energy from marine energy became one of the most preferable resources since it is a clean source and friendly to environment. Egypt has long shores along Mediterranean with important cities that need energy resources with significant wave energy. No detailed studies have been done on wave energy distribution in the Egyptian waters. The objective of this paper is to assess the energy wave power available in the Egyptian waters for the choice of the most suitable devices to be used in this area. This paper deals the characteristics and power of the offshore waves in the Egyptian waters. Since the field observations of waves are not frequent and need much technical work, the European Centre for Medium-Range Weather Forecasts (ECMWF) interim reanalysis data in Mediterranean, with a grid size 0.75 degree, which is a relatively course grid, are considered in the present study for preliminary assessment of sea waves characteristics and power. The used data covers the period from 2012 to 2014. The data used are significant wave height (swh), mean wave period (mwp) and wave direction taken at six hourly intervals, at seven chosen stations, and at grid points covering the Egyptian waters. The wave power (wp) formula was used to calculate energy flux. Descriptive statistical analysis including monthly means and standard deviations of the swh, mwp, and wp. The percentiles of wave heights and their corresponding power are done, as a tool of choice of the best technology suitable for the site. The surfer is used to show spatial distributions of wp. The analysis of data at chosen 7 stations determined the potential of wp off important Egyptian cities. Offshore of Al Saloum and Marsa Matruh, the highest wp occurred in January and February (16.93-18.05) ± (18.08-22.12) kw/m while the lowest occurred in June and October (1.49-1.69) ± (1.45-1.74) kw/m. In front of Alexandria and Rashid, the highest wp occurred in January and February (16.93-18.05) ± (18.08-22.12) kw/m while the lowest occurred in June and September (1.29-2.01) ± (1.31-1.83) kw/m. In front of Damietta and Port Said, the highest wp occurred in February (14.29-17.61) ± (21.61-27.10) kw/m and the lowest occurred in June (0.94-0.96) ± (0.71-0.72) kw/m. In winter, the probabilities of waves higher than 0.8 m in percentage were, at Al Saloum and Marsa Matruh (76.56-80.33) ± (11.62-12.05), at Alexandria and Rashid (73.67-74.79) ± (16.21-18.59) and at Damietta and Port Said (66.28-68.69) ± (17.88-17.90). In spring, the percentiles were, at Al Saloum and Marsa Matruh, (48.17-50.92) ± (5.79-6.56), at Alexandria and Rashid, (39.38-43.59) ± (9.06-9.34) and at Damietta and Port Said, (31.59-33.61) ± (10.72-11.25). In summer, the probabilities were, at Al Saloum and Marsa Matruh (57.70-66.67) ± (4.87-6.83), at Alexandria and Rashid (59.96-65.13) ± (9.14-9.35) and at Damietta and Port Said (46.38-49.28) ± (10.89-11.47). In autumn, the probabilities were, at Al Saloum and Marsa Matruh (58.75-59.56) ± (2.55-5.84), at Alexandria and Rashid (47.78-52.13) ± (3.11-7.08) and at Damietta and Port Said (41.16-42.52) ± (7.52-8.34). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=distribution%20of%20sea%20waves%20energy" title="distribution of sea waves energy">distribution of sea waves energy</a>, <a href="https://publications.waset.org/abstracts/search?q=Egyptian%20Mediterranean%20waters" title=" Egyptian Mediterranean waters"> Egyptian Mediterranean waters</a>, <a href="https://publications.waset.org/abstracts/search?q=waves%20characteristics" title=" waves characteristics"> waves characteristics</a>, <a href="https://publications.waset.org/abstracts/search?q=waves%20power" title=" waves power"> waves power</a> </p> <a href="https://publications.waset.org/abstracts/80882/analysis-of-sea-waves-characteristics-and-assessment-of-potential-wave-power-in-egyptian-mediterranean-waters" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/80882.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">191</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> Estimation of the External Force for a Co-Manipulation Task Using the Drive Chain Robot</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sylvain%20Devie">Sylvain Devie</a>, <a href="https://publications.waset.org/abstracts/search?q=Pierre-Philippe%20Robet"> Pierre-Philippe Robet</a>, <a href="https://publications.waset.org/abstracts/search?q=Yannick%20Aoustin"> Yannick Aoustin</a>, <a href="https://publications.waset.org/abstracts/search?q=Maxime%20Gautier"> Maxime Gautier</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The aim of this paper is to show that the observation of the external effort and the sensor-less control of a system is limited by the mechanical system. First, the model of a one-joint robot with a prismatic joint is presented. Based on this model, two different procedures were performed in order to identify the mechanical parameters of the system and observe the external effort applied on it. Experiments have proven that the accuracy of the force observer, based on the DC motor current, is limited by the mechanics of the robot. The sensor-less control will be limited by the accuracy in estimation of the mechanical parameters and by the maximum static friction force, that is the minimum force which can be observed in this case. The consequence of this limitation is that industrial robots without specific design are not well adapted to perform sensor-less precision tasks. Finally, an efficient control law is presented for high effort applications. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=control" title="control">control</a>, <a href="https://publications.waset.org/abstracts/search?q=identification" title=" identification"> identification</a>, <a href="https://publications.waset.org/abstracts/search?q=robot" title=" robot"> robot</a>, <a href="https://publications.waset.org/abstracts/search?q=co-manipulation" title=" co-manipulation"> co-manipulation</a>, <a href="https://publications.waset.org/abstracts/search?q=sensor-less" title=" sensor-less"> sensor-less</a> </p> <a href="https://publications.waset.org/abstracts/95452/estimation-of-the-external-force-for-a-co-manipulation-task-using-the-drive-chain-robot" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/95452.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">160</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> A Comparative Evaluation of Finite Difference Methods for the Extended Boussinesq Equations and Application to Tsunamis Modelling</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Aurore%20Cauquis">Aurore Cauquis</a>, <a href="https://publications.waset.org/abstracts/search?q=Philippe%20Heinrich"> Philippe Heinrich</a>, <a href="https://publications.waset.org/abstracts/search?q=Mario%20Ricchiuto"> Mario Ricchiuto</a>, <a href="https://publications.waset.org/abstracts/search?q=Audrey%20Gailler"> Audrey Gailler</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this talk, we look for an accurate time scheme to model the propagation of waves. Several numerical schemes have been developed to solve the extended weakly nonlinear weakly dispersive Boussinesq Equations. The temporal schemes used are two Lax-Wendroff schemes, second or third order accurate, two Runge-Kutta schemes of second and third order and a simplified third order accurate Lax-Wendroff scheme. Spatial derivatives are evaluated with fourth order accuracy. The numerical model is applied to two monodimensional benchmarks on a flat bottom. It is also applied to the simulation of the Algerian tsunami generated by a Mw=6 seism on the 18th March 2021. The tsunami propagation was highly dispersive and propagated across the Mediterranean Sea. We study here the effects of the order of temporal discretization on the accuracy of the results and on the time of computation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=numerical%20analysis" title="numerical analysis">numerical analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=tsunami%20propagation" title=" tsunami propagation"> tsunami propagation</a>, <a href="https://publications.waset.org/abstracts/search?q=water%20wave" title=" water wave"> water wave</a>, <a href="https://publications.waset.org/abstracts/search?q=boussinesq%20equations" title=" boussinesq equations"> boussinesq equations</a> </p> <a href="https://publications.waset.org/abstracts/141542/a-comparative-evaluation-of-finite-difference-methods-for-the-extended-boussinesq-equations-and-application-to-tsunamis-modelling" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/141542.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">241</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> Biomimicked Nano-Structured Coating Elaboration by Soft Chemistry Route for Self-Cleaning and Antibacterial Uses </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Elodie%20Niemiec">Elodie Niemiec</a>, <a href="https://publications.waset.org/abstracts/search?q=Philippe%20Champagne"> Philippe Champagne</a>, <a href="https://publications.waset.org/abstracts/search?q=Jean-Francois%20Blach"> Jean-Francois Blach</a>, <a href="https://publications.waset.org/abstracts/search?q=Philippe%20Moreau"> Philippe Moreau</a>, <a href="https://publications.waset.org/abstracts/search?q=Anthony%20Thuault"> Anthony Thuault</a>, <a href="https://publications.waset.org/abstracts/search?q=Arnaud%20Tricoteaux"> Arnaud Tricoteaux</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Hygiene of equipment in contact with users is an important issue in the railroad industry. The numerous cleanings to eliminate bacteria and dirt cost a lot. Besides, mechanical solicitations on contact parts are observed daily. It should be interesting to elaborate on a self-cleaning and antibacterial coating with sufficient adhesion and good resistance against mechanical and chemical solicitations. Thus, a Hauts-de-France and Maubeuge Val-de-Sambre conurbation authority co-financed Ph.D. thesis has been set up since October 2017 based on anterior studies carried by the Laboratory of Ceramic Materials and Processing. To accomplish this task, a soft chemical route has been implemented to bring a lotus effect on metallic substrates. It involves nanometric liquid zinc oxide synthesis under 100°C. The originality here consists in a variation of surface texturing by modification of the synthesis time of the species in solution. This helps to adjust wettability. Nanostructured zinc oxide has been chosen because of the inherent photocatalytic effect, which can activate organic substance degradation. Two methods of heating have been compared: conventional and microwave assistance. Tested subtracts are made of stainless steel to conform to transport uses. Substrate preparation was the first step of this protocol: a meticulous cleaning of the samples is applied. The main goal of the elaboration protocol is to fix enough zinc-based seeds to make them grow during the next step as desired (nanorod shaped). To improve this adhesion, a silica gel has been formulated and optimized to ensure chemical bonding between substrate and zinc seeds. The last step consists of deposing a wide carbonated organosilane to improve the superhydrophobic property of the coating. The quasi-proportionality between the reaction time and the nanorod length will be demonstrated. Water Contact (superior to 150°) and Roll-off Angle at different steps of the process will be presented. The antibacterial effect has been proved with Escherichia Coli, Staphylococcus Aureus, and Bacillus Subtilis. The mortality rate is found to be four times superior to a non-treated substrate. Photocatalytic experiences were carried out from different dyed solutions in contact with treated samples under UV irradiation. Spectroscopic measurements allow to determinate times of degradation according to the zinc quantity available on the surface. The final coating obtained is, therefore, not a monolayer but rather a set of amorphous/crystalline/amorphous layers that have been characterized by spectroscopic ellipsometry. We will show that the thickness of the nanostructured oxide layer depends essentially on the synthesis time set in the hydrothermal growth step. A green, easy-to-process and control coating with self-cleaning and antibacterial properties has been synthesized with a satisfying surface structuration. <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=biomimetism" title=" biomimetism"> biomimetism</a>, <a href="https://publications.waset.org/abstracts/search?q=soft-chemistry" title=" soft-chemistry"> soft-chemistry</a>, <a href="https://publications.waset.org/abstracts/search?q=zinc%20oxide" title=" zinc oxide"> zinc oxide</a> </p> <a href="https://publications.waset.org/abstracts/112809/biomimicked-nano-structured-coating-elaboration-by-soft-chemistry-route-for-self-cleaning-and-antibacterial-uses" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/112809.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">142</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> Numerical Study of the Influence of the Primary Stream Pressure on the Performance of the Ejector Refrigeration System Based on Heat Exchanger Modeling</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Elhameh%20Narimani">Elhameh Narimani</a>, <a href="https://publications.waset.org/abstracts/search?q=Mikhail%20Sorin"> Mikhail Sorin</a>, <a href="https://publications.waset.org/abstracts/search?q=Philippe%20Micheau"> Philippe Micheau</a>, <a href="https://publications.waset.org/abstracts/search?q=Hakim%20Nesreddine"> Hakim Nesreddine</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Numerical models of the heat exchangers in ejector refrigeration system (ERS) were developed and validated with the experimental data. The models were based on the switched heat exchangers model using the moving boundary method, which were capable of estimating the zones’ lengths, the outlet temperatures of both sides and the heat loads at various experimental points. The developed models were utilized to investigate the influence of the primary flow pressure on the performance of an R245fa ERS based on its coefficient of performance (COP) and exergy efficiency. It was illustrated numerically and proved experimentally that increasing the primary flow pressure slightly reduces the COP while the exergy efficiency goes through a maximum before decreasing. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Coefficient%20of%20Performance" title="Coefficient of Performance">Coefficient of Performance</a>, <a href="https://publications.waset.org/abstracts/search?q=COP" title=" COP"> COP</a>, <a href="https://publications.waset.org/abstracts/search?q=Ejector%20Refrigeration%20System" title=" Ejector Refrigeration System"> Ejector Refrigeration System</a>, <a href="https://publications.waset.org/abstracts/search?q=ERS" title=" ERS"> ERS</a>, <a href="https://publications.waset.org/abstracts/search?q=exergy%20efficiency%20%28%CE%B7II%29" title=" exergy efficiency (ηII)"> exergy efficiency (ηII)</a>, <a href="https://publications.waset.org/abstracts/search?q=heat%20exchangers%20modeling" title=" heat exchangers modeling"> heat exchangers modeling</a>, <a href="https://publications.waset.org/abstracts/search?q=moving%20boundary%20method" title=" moving boundary method"> moving boundary method</a> </p> <a href="https://publications.waset.org/abstracts/97293/numerical-study-of-the-influence-of-the-primary-stream-pressure-on-the-performance-of-the-ejector-refrigeration-system-based-on-heat-exchanger-modeling" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/97293.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">202</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> Synthesis and Characterization of Fluorine-Free, Hydrophobic and Highly Transparent Coatings </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Abderrahmane%20Hamdi">Abderrahmane Hamdi</a>, <a href="https://publications.waset.org/abstracts/search?q=Julie%20Chalon"> Julie Chalon</a>, <a href="https://publications.waset.org/abstracts/search?q=Benoit%20Dodin"> Benoit Dodin</a>, <a href="https://publications.waset.org/abstracts/search?q=Philippe%20Champagne"> Philippe Champagne</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This research work concerns the synthesis of hydrophobic and self-cleaning coatings as an alternative to fluorine-based coatings used on glass. The developed, highly transparent coatings are produced by a chemical route (sol-gel method) using two silica-based precursors, hexamethyldisilazane and tetraethoxysilane (HMDS/TEOS). The addition of zinc oxide nanoparticles (ZnO NPs) within the gel provides a photocatalytic property to the final coating. The prepared gels were deposited on glass slides using different methods. The properties of the coatings were characterized by optical microscopy, scanning electron microscopy, UV-VIS-NIR spectrophotometer, and water contact angle method. The results show that the obtained coatings are homogeneous and have a hydrophobic character. In particular, after thermal treatment, the HMDS/TEOS@ZnO charged gel deposited on glass constitutes a coating capable of degrading methylene blue (MB) under UV irradiation. Optical transmission reaches more than 90% in most of the visible light spectrum. Synthetized coatings have also demonstrated their mechanical durability and self-cleaning ability. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=coating" title="coating">coating</a>, <a href="https://publications.waset.org/abstracts/search?q=durability" title=" durability"> durability</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrophobicity" title=" hydrophobicity"> hydrophobicity</a>, <a href="https://publications.waset.org/abstracts/search?q=sol-gel" title=" sol-gel"> sol-gel</a>, <a href="https://publications.waset.org/abstracts/search?q=self-cleaning" title=" self-cleaning"> self-cleaning</a>, <a href="https://publications.waset.org/abstracts/search?q=transparence" title=" transparence"> transparence</a> </p> <a href="https://publications.waset.org/abstracts/122907/synthesis-and-characterization-of-fluorine-free-hydrophobic-and-highly-transparent-coatings" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/122907.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">59</span> Investigation of a Hybrid Process: Multipoint Incremental Forming</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Safa%20Boudhaouia">Safa Boudhaouia</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Amen%20Gahbiche"> Mohamed Amen Gahbiche</a>, <a href="https://publications.waset.org/abstracts/search?q=Eliane%20Giraud"> Eliane Giraud</a>, <a href="https://publications.waset.org/abstracts/search?q=Wacef%20Ben%20Salem"> Wacef Ben Salem</a>, <a href="https://publications.waset.org/abstracts/search?q=Philippe%20Dal%20Santo"> Philippe Dal Santo</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Multi-point forming (MPF) and asymmetric incremental forming (ISF) are two flexible processes for sheet metal manufacturing. To take advantages of these two techniques, a hybrid process has been developed: The Multipoint Incremental Forming (MPIF). This process accumulates at once the advantages of each of these last mentioned forming techniques, which makes it a very interesting and particularly an efficient process for single, small, and medium series production. In this paper, an experimental and a numerical investigation of this technique are presented. To highlight the flexibility of this process and its capacity to manufacture standard and complex shapes, several pieces were produced by using MPIF. The forming experiments are performed on a 3-axis CNC machine. Moreover, a numerical model of the MPIF process has been implemented in ABAQUS and the analysis showed a good agreement with experimental results in terms of deformed shape. Furthermore, the use of an elastomeric interpolator allows avoiding classical local defaults like dimples, which are generally caused by the asymmetric contact and also improves the distribution of residual strain. Future works will apply this approach to other alloys used in aeronautic or automotive applications. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=incremental%20forming" title="incremental forming">incremental forming</a>, <a href="https://publications.waset.org/abstracts/search?q=numerical%20simulation" title=" numerical simulation"> numerical simulation</a>, <a href="https://publications.waset.org/abstracts/search?q=MPIF" title=" MPIF"> MPIF</a>, <a href="https://publications.waset.org/abstracts/search?q=multipoint%20forming" title=" multipoint forming"> multipoint forming</a> </p> <a href="https://publications.waset.org/abstracts/51894/investigation-of-a-hybrid-process-multipoint-incremental-forming" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/51894.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">356</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> Numerical Investigation of a Slightly Oblique Round Jet Flowing into a Uniform Counterflow Stream</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Amani%20Amamou">Amani Amamou</a>, <a href="https://publications.waset.org/abstracts/search?q=Sabra%20Habli"> Sabra Habli</a>, <a href="https://publications.waset.org/abstracts/search?q=Nejla%20Mahjoub%20Sa%C3%AFd"> Nejla Mahjoub Saïd</a>, <a href="https://publications.waset.org/abstracts/search?q=Philippe%20Bournot"> Philippe Bournot</a>, <a href="https://publications.waset.org/abstracts/search?q=Georges%20Le%20Palec"> Georges Le Palec</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A counterflowing jet is a particular configuration of turbulent jets issuing into a moving ambient which has not carried much attention in literature compared with jet in a coflow or in a crossflow. This is due to the marked instability of the jet in a counterflow coupled with experimental and theoretical difficulties related to the flow inversion phenomenon. Nevertheless, jets in a counterflow are encountered in many engineering applications which required enhanced mixing as combustion, process and environmental engineering. In this work, we propose to investigate a round turbulent jet flowing into a uniform counterflow stream through a numerical approach. A hydrodynamic and thermal study of a slightly oblique round jets issuing into a uniform counterflow stream is carried out for different jet-to-counterflow velocity ratios ranging between 3.1 and 15. It is found that even a slight inclination of the jet in the vertical direction of the flow affects the structure and the velocity field of the counterflowing jet. In addition, the evolution of passive scalar temperature and pertinent length scales are presented at various velocity ratios, confirming that the flow is sensitive to directional perturbations. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=jet" title="jet">jet</a>, <a href="https://publications.waset.org/abstracts/search?q=counterflow" title=" counterflow"> counterflow</a>, <a href="https://publications.waset.org/abstracts/search?q=velocity" title=" velocity"> velocity</a>, <a href="https://publications.waset.org/abstracts/search?q=temperature" title=" temperature"> temperature</a>, <a href="https://publications.waset.org/abstracts/search?q=jet%20inclination" title=" jet inclination"> jet inclination</a> </p> <a href="https://publications.waset.org/abstracts/42541/numerical-investigation-of-a-slightly-oblique-round-jet-flowing-into-a-uniform-counterflow-stream" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/42541.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">269</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> Thermomechanical Behaviour of Various Pressurized Installations Subjected to Thermal Load Due to the Combustion of Metal Particles</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Khaled%20Ayfi">Khaled Ayfi</a>, <a href="https://publications.waset.org/abstracts/search?q=Morgan%20Dal"> Morgan Dal</a>, <a href="https://publications.waset.org/abstracts/search?q=Frederic%20Coste"> Frederic Coste</a>, <a href="https://publications.waset.org/abstracts/search?q=Nicolas%20Gallienne"> Nicolas Gallienne</a>, <a href="https://publications.waset.org/abstracts/search?q=Martina%20Ridlova"> Martina Ridlova</a>, <a href="https://publications.waset.org/abstracts/search?q=Philippe%20Lorong"> Philippe Lorong</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In the gas industry, contamination of equipment by metal particles is one of the feared phenomena. Indeed, particles inside equipment can be driven by the gas flow and accumulate in places where the velocity is low. As they constitute a potential ignition hazard, particular attention is paid to the presence of particles in the oxygen industry. Indeed, the heat release from ignited particles may damage the equipment and even result in a loss of integrity. The objective of this work is to support the development of new design criteria. Studying the thermomechanical behavior of this equipment, thanks to numerical simulations, allows us to test the influence of various operating parameters (oxygen pressure, wall thickness, initial operating temperature, nature of the metal, etc.). Therefore, in this study, we propose a numerical model that describes the thermomechanical behavior of various pressurized installations heated locally by the combustion of small particles. This model takes into account the geometric and material nonlinearity and has been validated by the comparison of simulation results with experimental measurements obtained by a new device developed in this work. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ignition" title="ignition">ignition</a>, <a href="https://publications.waset.org/abstracts/search?q=oxygen" title=" oxygen"> oxygen</a>, <a href="https://publications.waset.org/abstracts/search?q=numerical%20simulation" title=" numerical simulation"> numerical simulation</a>, <a href="https://publications.waset.org/abstracts/search?q=thermomechanical%20behaviour" title=" thermomechanical behaviour"> thermomechanical behaviour</a> </p> <a href="https://publications.waset.org/abstracts/135549/thermomechanical-behaviour-of-various-pressurized-installations-subjected-to-thermal-load-due-to-the-combustion-of-metal-particles" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/135549.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">154</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> Development of Tools for Multi Vehicles Simulation with Robot Operating System and ArduPilot</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Pierre%20Kancir">Pierre Kancir</a>, <a href="https://publications.waset.org/abstracts/search?q=Jean-Philippe%20Diguet"> Jean-Philippe Diguet</a>, <a href="https://publications.waset.org/abstracts/search?q=Marc%20Sevaux"> Marc Sevaux</a> </p> <p class="card-text"><strong>Abstract:</strong></p> One of the main difficulties in developing multi-robot systems (MRS) is related to the simulation and testing tools available. Indeed, if the differences between simulations and real robots are too significant, the transition from the simulation to the robot won’t be possible without another long development phase and won’t permit to validate the simulation. Moreover, the testing of different algorithmic solutions or modifications of robots requires a strong knowledge of current tools and a significant development time. Therefore, the availability of tools for MRS, mainly with flying drones, is crucial to enable the industrial emergence of these systems. This research aims to present the most commonly used tools for MRS simulations and their main shortcomings and presents complementary tools to improve the productivity of designers in the development of multi-vehicle solutions focused on a fast learning curve and rapid transition from simulations to real usage. The proposed contributions are based on existing open source tools as Gazebo simulator combined with ROS (Robot Operating System) and the open-source multi-platform autopilot ArduPilot to bring them to a broad audience. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ROS" title="ROS">ROS</a>, <a href="https://publications.waset.org/abstracts/search?q=ArduPilot" title=" ArduPilot"> ArduPilot</a>, <a href="https://publications.waset.org/abstracts/search?q=MRS" title=" MRS"> MRS</a>, <a href="https://publications.waset.org/abstracts/search?q=simulation" title=" simulation"> simulation</a>, <a href="https://publications.waset.org/abstracts/search?q=drones" title=" drones"> drones</a>, <a href="https://publications.waset.org/abstracts/search?q=Gazebo" title=" Gazebo"> Gazebo</a> </p> <a href="https://publications.waset.org/abstracts/100338/development-of-tools-for-multi-vehicles-simulation-with-robot-operating-system-and-ardupilot" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/100338.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">210</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> The Effect of Cognitively-Induced Self-Construal and Direct Behavioral Mimicry on Prosocial Behavior</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Czar%20Matthew%20Gerard%20Dayday">Czar Matthew Gerard Dayday</a>, <a href="https://publications.waset.org/abstracts/search?q=Danielle%20Marie%20Estrera"> Danielle Marie Estrera</a>, <a href="https://publications.waset.org/abstracts/search?q=Philippe%20Jefferson%20Galban"> Philippe Jefferson Galban</a>, <a href="https://publications.waset.org/abstracts/search?q=Gabrielle%20Marie%20Heredia"> Gabrielle Marie Heredia</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The study aimed to examine the effects of self-construal and direct mimicry on prosocial behavior. The study made use of a 2 (Self-construal: independent or interdependent) x 2 (Mimicry: mimicry or non-mimicry) between subjects factorial design where effects of self-construal was cognitively-induced through a story with varying pronouns (We, Us, Ourselves vs. Me, I, Myself), and prosocial behavior was measured with the amount of money donated to a fabricated advocacy. The research was conducted with a convenience sampling comprised of 88 undergraduate students (58 Females, 33 Males) aged 16 to 26 years olds from the University of the Philippines, Diliman. Results from the experiment show that both factors do not have significant main effects on prosocial behavior. Additionally, their interaction also does not have a significant effect to prosocial behavior with No Mimicry x Independent ranking highest in amount of money donated and Mimicry x Interdependent ranking lowest. These results can be attributed to multiple factors, which include the collectivist orientation and sense of kapwa of Filipinos, a role reversal in the methodology and the lack of Chameleon Effect, and a weak priming of self-construal with respect to self-relatedness. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=behavior" title="behavior">behavior</a>, <a href="https://publications.waset.org/abstracts/search?q=mimicry" title=" mimicry"> mimicry</a>, <a href="https://publications.waset.org/abstracts/search?q=prosocial" title=" prosocial"> prosocial</a>, <a href="https://publications.waset.org/abstracts/search?q=self-construal" title=" self-construal"> self-construal</a> </p> <a href="https://publications.waset.org/abstracts/58111/the-effect-of-cognitively-induced-self-construal-and-direct-behavioral-mimicry-on-prosocial-behavior" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/58111.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">54</span> Effects of Voltage Pulse Characteristics on Some Performance Parameters of LiₓCoO₂-based Resistive Switching Memory Devices</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Van%20Son%20Nguyen">Van Son Nguyen</a>, <a href="https://publications.waset.org/abstracts/search?q=Van%20Huy%20Mai"> Van Huy Mai</a>, <a href="https://publications.waset.org/abstracts/search?q=Alec%20Moradpour"> Alec Moradpour</a>, <a href="https://publications.waset.org/abstracts/search?q=Pascale%20Auban%20Senzier"> Pascale Auban Senzier</a>, <a href="https://publications.waset.org/abstracts/search?q=Claude%20Pasquier"> Claude Pasquier</a>, <a href="https://publications.waset.org/abstracts/search?q=Kang%20Wang"> Kang Wang</a>, <a href="https://publications.waset.org/abstracts/search?q=Pierre-Antoine%20Albouy"> Pierre-Antoine Albouy</a>, <a href="https://publications.waset.org/abstracts/search?q=Marcelo%20J.%20Rozenberg"> Marcelo J. Rozenberg</a>, <a href="https://publications.waset.org/abstracts/search?q=John%20Giapintzakis"> John Giapintzakis</a>, <a href="https://publications.waset.org/abstracts/search?q=Christian%20N.%20Mihailescu"> Christian N. Mihailescu</a>, <a href="https://publications.waset.org/abstracts/search?q=Charis%20M.%20Orfanidou"> Charis M. Orfanidou</a>, <a href="https://publications.waset.org/abstracts/search?q=Thomas%20Maroutian"> Thomas Maroutian</a>, <a href="https://publications.waset.org/abstracts/search?q=Philippe%20Lecoeur"> Philippe Lecoeur</a>, <a href="https://publications.waset.org/abstracts/search?q=Guillaume%20Agnus"> Guillaume Agnus</a>, <a href="https://publications.waset.org/abstracts/search?q=Pascal%20Aubert"> Pascal Aubert</a>, <a href="https://publications.waset.org/abstracts/search?q=Sylvain%20Franger"> Sylvain Franger</a>, <a href="https://publications.waset.org/abstracts/search?q=Rapha%C3%ABl%20Salot"> Raphaël Salot</a>, <a href="https://publications.waset.org/abstracts/search?q=Nathalie%20Brun"> Nathalie Brun</a>, <a href="https://publications.waset.org/abstracts/search?q=Katia%20March"> Katia March</a>, <a href="https://publications.waset.org/abstracts/search?q=David%20Alamarguy"> David Alamarguy</a>, <a href="https://publications.waset.org/abstracts/search?q=Pascal%20Chr%C3%A9Tien"> Pascal ChréTien</a>, <a href="https://publications.waset.org/abstracts/search?q=Olivier%20Schneegans"> Olivier Schneegans</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In the field of Nanoelectronics, a major research activity is being developed towards non-volatile memories. To face the limitations of existing Flash memory cells (endurance, downscaling, rapidity…), new approaches are emerging, among them resistive switching memories (Re-RAM). In this work, we analysed the behaviour of LixCoO2 oxide thin films in electrode/film/electrode devices. Preliminary results have been obtained concerning the influence of bias pulses characteristics (duration, value) on some performance parameters, such as endurance and resistance ratio (ROFF/RON). Besides, Conducting Probe Atomic Force Microscopy (CP-AFM) characterizations of the devices have been carried out to better understand some causes of performance failure, and thus help optimizing the switching performance of such devices. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=non%20volatile%20resistive%20memories" title="non volatile resistive memories">non volatile resistive memories</a>, <a href="https://publications.waset.org/abstracts/search?q=resistive%20switching" title=" resistive switching"> resistive switching</a>, <a href="https://publications.waset.org/abstracts/search?q=thin%20films" title=" thin films"> thin films</a>, <a href="https://publications.waset.org/abstracts/search?q=endurance" title=" endurance"> endurance</a> </p> <a href="https://publications.waset.org/abstracts/65064/effects-of-voltage-pulse-characteristics-on-some-performance-parameters-of-licoo2-based-resistive-switching-memory-devices" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/65064.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">611</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> Investigation of Corrosion of Steel Buried in Unsaturated Soil in the Presence of Cathodic Protection: The Modified Voltammetry Technique</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mandlenkosi%20G.%20R.%20Mahlobo">Mandlenkosi G. R. Mahlobo</a>, <a href="https://publications.waset.org/abstracts/search?q=Peter%20A.%20Olubambi"> Peter A. Olubambi</a>, <a href="https://publications.waset.org/abstracts/search?q=Philippe%20Refait"> Philippe Refait</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The aim of this study was to use voltammetry as a method to understand the behaviour of steel in unsaturated soil in the presence of cathodic protection (CP). Three carbon steel coupons were buried in artificial soil wetted at 65-70% of saturation for 37 days. All three coupons were left at open circuit potential (OCP) for the first seven days in the unsaturated soil before CP, which was only applied on two of the three coupons at the protection potential -0.8 V vs Cu/CuSO₄ for the remaining 30 days of the experiment. Voltammetry was performed weekly on the coupon without CP, while electrochemical impedance spectroscopy (EIS) was performed daily to monitor and correct the applied CP potential from the ohmic drop. Voltammetry was finally performed on the last day on the coupons under CP. All the voltammograms were modeled with mathematical equations in order to compute the electrochemical parameters and subsequently deduced the corrosion rate of the steel coupons. For the coupon without CP, the corrosion rate was determined at 300 µm/y. For the coupons under CP, the residual corrosion rate under CP was estimated at 12 µm/y while the corrosion rate of the coupons, after interruption of CP, was estimated at 25 µm/y. This showed that CP was efficient due to two effects: a direct effect from the decreased potential and an induced effect associated with the increased interfacial pH that promoted the formation of a protective layer on the steel surface. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=carbon%20steel" title="carbon steel">carbon steel</a>, <a href="https://publications.waset.org/abstracts/search?q=cathodic%20protection" title=" cathodic protection"> cathodic protection</a>, <a href="https://publications.waset.org/abstracts/search?q=voltammetry" title=" voltammetry"> voltammetry</a>, <a href="https://publications.waset.org/abstracts/search?q=unsaturated%20soil" title=" unsaturated soil"> unsaturated soil</a>, <a href="https://publications.waset.org/abstracts/search?q=Raman%20spectroscopy" title=" Raman spectroscopy"> Raman spectroscopy</a> </p> <a href="https://publications.waset.org/abstracts/171319/investigation-of-corrosion-of-steel-buried-in-unsaturated-soil-in-the-presence-of-cathodic-protection-the-modified-voltammetry-technique" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/171319.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">62</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> Inhibition of the Corrosion of Copper in 0.5 NaCl Solutions by Aqueous Extract and Hydrolysis Acid of Olive Leaf Extract</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Chahla%20Rahal">Chahla Rahal</a>, <a href="https://publications.waset.org/abstracts/search?q=Philippe%20Refait"> Philippe Refait</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Oleuropein-rich extract from olive leaf and acid hydrolysates, rich in hydroxytyrosol and elenolic acid was prepared under different experimental conditions. These phenolic compounds may be used as a corrosion inhibitor. The inhibitive action of these extracts and its major constituents on the corrosion of copper in 0.5 M NaCl solution has been evaluated by potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and weight loss measurements. The product of extraction was analyzed with high performance liquid chromatography (HPLC), whose analysis shows that olive leaf extract are greatly rich in phenolic compounds, mainly Oleuropeine (OLE), Hydroxytyrosol (HT) and elenolic acid (EA). After the acid hydrolysis and high temperature of extraction, an increase in hydroxytyrosol concentration was detected, coupled with relatively low oleuropeine content and high concentration of elenolic acid. The potentiodynamic measurements have shown that this extract acts as a mixed-type corrosion inhibitor, and good inhibition efficiency is observed with the increase in HT and EA concentration. These results suggest that the inhibitive effect of olive leaf extract might be due to the adsorption of the various phenolic compounds onto the copper surface. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=olive%20leaf%20extract" title="olive leaf extract">olive leaf extract</a>, <a href="https://publications.waset.org/abstracts/search?q=oleuropein" title=" oleuropein"> oleuropein</a>, <a href="https://publications.waset.org/abstracts/search?q=voltammetry" title=" voltammetry"> voltammetry</a>, <a href="https://publications.waset.org/abstracts/search?q=copper" title=" copper"> copper</a>, <a href="https://publications.waset.org/abstracts/search?q=corrosion" title=" corrosion"> corrosion</a>, <a href="https://publications.waset.org/abstracts/search?q=HPLC" title=" HPLC"> HPLC</a>, <a href="https://publications.waset.org/abstracts/search?q=EIS" title=" EIS"> EIS</a> </p> <a href="https://publications.waset.org/abstracts/61014/inhibition-of-the-corrosion-of-copper-in-05-nacl-solutions-by-aqueous-extract-and-hydrolysis-acid-of-olive-leaf-extract" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/61014.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">302</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> TomoTherapy® System Repositioning Accuracy According to Treatment Localization</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Veronica%20Sorgato">Veronica Sorgato</a>, <a href="https://publications.waset.org/abstracts/search?q=Jeremy%20Belhassen"> Jeremy Belhassen</a>, <a href="https://publications.waset.org/abstracts/search?q=Philippe%20Chartier"> Philippe Chartier</a>, <a href="https://publications.waset.org/abstracts/search?q=Roddy%20Sihanath"> Roddy Sihanath</a>, <a href="https://publications.waset.org/abstracts/search?q=Nicolas%20Docquiere"> Nicolas Docquiere</a>, <a href="https://publications.waset.org/abstracts/search?q=Jean-Yves%20Giraud"> Jean-Yves Giraud</a> </p> <p class="card-text"><strong>Abstract:</strong></p> We analyzed the image-guided radiotherapy method used by the TomoTherapy® System (Accuray Corp.) for patient repositioning in clinical routine. The TomoTherapy® System computes X, Y, Z and roll displacements to match the reference CT, on which the dosimetry has been performed, with the pre-treatment MV CT. The accuracy of the repositioning method has been studied according to the treatment localization. For this, a database of 18774 treatment sessions, performed during 2 consecutive years (2016-2017 period) has been used. The database includes the X, Y, Z and roll displacements proposed by TomoTherapy® System as well as the manual correction of these proposals applied by the radiation therapist. This manual correction aims to further improve the repositioning based on the clinical situation and depends on the structures surrounding the target tumor tissue. The statistical analysis performed on the database aims to define repositioning limits to be used as security and guiding tool for the manual adjustment implemented by the radiation therapist. This tool will participate not only to notify potential repositioning errors but also to further improve patient positioning for optimal treatment. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=accuracy" title="accuracy">accuracy</a>, <a href="https://publications.waset.org/abstracts/search?q=IGRT%20MVCT" title=" IGRT MVCT"> IGRT MVCT</a>, <a href="https://publications.waset.org/abstracts/search?q=image-guided%20radiotherapy%20megavoltage%20computed%20tomography" title=" image-guided radiotherapy megavoltage computed tomography"> image-guided radiotherapy megavoltage computed tomography</a>, <a href="https://publications.waset.org/abstracts/search?q=statistical%20analysis" title=" statistical analysis"> statistical analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=tomotherapy" title=" tomotherapy"> tomotherapy</a>, <a href="https://publications.waset.org/abstracts/search?q=localization" title=" localization"> localization</a> </p> <a href="https://publications.waset.org/abstracts/96757/tomotherapy-system-repositioning-accuracy-according-to-treatment-localization" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/96757.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">50</span> Addressing Sexual Health in Males with Spinal Cord Injury in Rural South India: Using the Knowledge to Action Framework to Evaluate an Education Manual on Improving Knowledge, Attitudes and Practices</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Cassandra%20Maffei">Cassandra Maffei</a>, <a href="https://publications.waset.org/abstracts/search?q=Effie%20Pomaki"> Effie Pomaki</a>, <a href="https://publications.waset.org/abstracts/search?q=Salom%C3%A9%20Deslauriers-Brouillard"> Salomé Deslauriers-Brouillard</a>, <a href="https://publications.waset.org/abstracts/search?q=Levana%20Dahan"> Levana Dahan</a>, <a href="https://publications.waset.org/abstracts/search?q=Caroline%20Storr"> Caroline Storr</a>, <a href="https://publications.waset.org/abstracts/search?q=Ramasubramanian%20Ponnusamy"> Ramasubramanian Ponnusamy</a>, <a href="https://publications.waset.org/abstracts/search?q=Philippe%20S.%20Archambault"> Philippe S. Archambault</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Sexual health education following spinal cord injury (SCI) remains poorly integrated into the rehabilitation process, especially in low-income countries where the topics of disability and sexuality are stigmatized. This research aimed to evaluate a sexual health manual that was created and distributed amongst males with SCI who had received rehabilitation services at Amar Seva Sangam (ASSA), a rehabilitation center located in rural South India. A service evaluation was completed to collect data from a convenience sample of 37 males with spinal cord injuries. Data were analyzed using descriptive statistics and content analysis. The service evaluation showed that the manual was well received by the sample and had positive impacts on secondary outcome measures, including relationship dynamics and quality of life. It can thus be used as an effective adjunct tool to support the improvement of sexual health knowledge, attitudes, and practices of individuals with SCI. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=spinal%20cord%20injury" title="spinal cord injury">spinal cord injury</a>, <a href="https://publications.waset.org/abstracts/search?q=sexual%20health" title=" sexual health"> sexual health</a>, <a href="https://publications.waset.org/abstracts/search?q=rehabilitation" title=" rehabilitation"> rehabilitation</a>, <a href="https://publications.waset.org/abstracts/search?q=India" title=" India"> India</a>, <a href="https://publications.waset.org/abstracts/search?q=education" title=" education"> education</a>, <a href="https://publications.waset.org/abstracts/search?q=service%20evaluation" title=" service evaluation"> service evaluation</a> </p> <a href="https://publications.waset.org/abstracts/166580/addressing-sexual-health-in-males-with-spinal-cord-injury-in-rural-south-india-using-the-knowledge-to-action-framework-to-evaluate-an-education-manual-on-improving-knowledge-attitudes-and-practices" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/166580.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">95</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> Olive Leaf Extract as Natural Corrosion Inhibitor for Pure Copper in 0.5 M NaCl Solution: A Study by Voltammetry around OCP </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Chahla%20Rahal">Chahla Rahal</a>, <a href="https://publications.waset.org/abstracts/search?q=Philippe%20Refait"> Philippe Refait </a> </p> <p class="card-text"><strong>Abstract:</strong></p> Oleuropein-rich extract from olive leaf and acid hydrolysates, rich in hydroxytyrosol and elenolic acid was prepared under different experimental conditions. These phenolic compounds may be used as a corrosion inhibitor. The inhibitive action of these extracts and its major constituents on the corrosion of copper in 0.5 M NaCl solution has been evaluated by potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and weight loss measurements. The product of extraction was analyzed with high performance liquid chromatography (HPLC), whose analysis shows that olive leaf extract are greatly rich in phenolic compounds, mainly Oleuropeine (OLE), Hydroxytyrosol (HT) and elenolic acid (EA). After the acid hydrolysis and high temperature of extraction, an increase in hydroxytyrosol concentration was detected, coupled with relatively low oleuropeine content and high concentration of elenolic acid. The potentiodynamic measurements have shown that this extract acts as a mixed-type corrosion inhibitor, and good inhibition efficiency is observed with the increase in HT and EA concentration. These results suggest that the inhibitive effect of olive leaf extract might be due to the adsorption of the various phenolic compounds onto the copper surface. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Olive%20leaf%20extract" title="Olive leaf extract">Olive leaf extract</a>, <a href="https://publications.waset.org/abstracts/search?q=Oleuropein" title=" Oleuropein"> Oleuropein</a>, <a href="https://publications.waset.org/abstracts/search?q=hydroxytyrosol" title=" hydroxytyrosol"> hydroxytyrosol</a>, <a href="https://publications.waset.org/abstracts/search?q=elenolic%20acid" title=" elenolic acid "> elenolic acid </a>, <a href="https://publications.waset.org/abstracts/search?q=Copper" title=" Copper"> Copper</a>, <a href="https://publications.waset.org/abstracts/search?q=Corrosion" title=" Corrosion"> Corrosion</a>, <a href="https://publications.waset.org/abstracts/search?q=HPLC%2FDAD" title=" HPLC/DAD"> HPLC/DAD</a>, <a href="https://publications.waset.org/abstracts/search?q=Polarisation" title=" Polarisation"> Polarisation</a>, <a href="https://publications.waset.org/abstracts/search?q=EIS" title=" EIS"> EIS</a> </p> <a href="https://publications.waset.org/abstracts/61007/olive-leaf-extract-as-natural-corrosion-inhibitor-for-pure-copper-in-05-m-nacl-solution-a-study-by-voltammetry-around-ocp" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/61007.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">257</span> </span> </div> </div> <ul class="pagination"> <li class="page-item disabled"><span class="page-link">&lsaquo;</span></li> <li class="page-item active"><span class="page-link">1</span></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=Philippe%20E.%20Nashar&page=2">2</a></li> <li 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