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<!DOCTYPE html> <html lang="en" dir="ltr"> <head>  <script async src="https://www.googletagmanager.com/gtag/js?id=G-P63WKM1TM1"></script> <script> window.dataLayer = window.dataLayer || []; function gtag(){dataLayer.push(arguments);} gtag('js', new Date()); gtag('config', 'G-P63WKM1TM1'); </script>  <script type="text/javascript" > (function(m,e,t,r,i,k,a){m[i]=m[i]||function(){(m[i].a=m[i].a||[]).push(arguments)}; m[i].l=1*new Date(); for (var j = 0; j < document.scripts.length; j++) {if (document.scripts[j].src === r) { return; }} k=e.createElement(t),a=e.getElementsByTagName(t)[0],k.async=1,k.src=r,a.parentNode.insertBefore(k,a)}) (window, document, "script", "https://mc.yandex.ru/metrika/tag.js", "ym"); ym(55165297, "init", { clickmap:false, trackLinks:true, accurateTrackBounce:true, webvisor:false }); </script> <noscript><div><img src="https://mc.yandex.ru/watch/55165297" style="position:absolute; left:-9999px;" alt="" /></div></noscript>    <title>Search results for: Zakaria S. G. Hegazy</title> <meta name="description" content="Search results for: Zakaria S. G. Hegazy"> <meta name="keywords" content="Zakaria S. G. Hegazy"> <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="Zakaria S. 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G. Hegazy"> <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> 119</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: Zakaria S. G. Hegazy</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">119</span> Islamic Equity Markets Response to Volatility of Bitcoin</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Zakaria%20S.%20G.%20Hegazy">Zakaria S. G. Hegazy</a>, <a href="https://publications.waset.org/abstracts/search?q=Walid%20M.%20A.%20Ahmed"> Walid M. A. Ahmed</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper examines the dependence structure of Islamic stock markets on Bitcoin’s realized volatility components in bear, normal, and bull market periods. A quantile regression approach is employed, after adjusting raw returns with respect to a broad set of relevant global factors and accounting for structural breaks in the data. The results reveal that upside volatility tends to exert negative influences on Islamic developed-market returns more in bear than in bull market conditions, while downside volatility positively affects returns during bear and bull conditions. For emerging markets, we find that the upside (downside) component exerts lagged negative (positive) effects on returns in bear (all) market regimes. By and large, the dependence structures turn out to be asymmetric. Our evidence provides essential implications for investors. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cryptocurrency%20markets" title="cryptocurrency markets">cryptocurrency markets</a>, <a href="https://publications.waset.org/abstracts/search?q=bitcoin" title=" bitcoin"> bitcoin</a>, <a href="https://publications.waset.org/abstracts/search?q=realized%20volatility%20measures" title=" realized volatility measures"> realized volatility measures</a>, <a href="https://publications.waset.org/abstracts/search?q=asymmetry" title=" asymmetry"> asymmetry</a>, <a href="https://publications.waset.org/abstracts/search?q=quantile%20regression" title=" quantile regression"> quantile regression</a> </p> <a href="https://publications.waset.org/abstracts/141351/islamic-equity-markets-response-to-volatility-of-bitcoin" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/141351.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">187</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">118</span> A Novel Probablistic Strategy for Modeling Photovoltaic Based Distributed Generators </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Engy%20A.%20Mohamed">Engy A. Mohamed</a>, <a href="https://publications.waset.org/abstracts/search?q=Y.%20G.%20Hegazy"> Y. G. Hegazy </a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper presents a novel algorithm for modeling photovoltaic based distributed generators for the purpose of optimal planning of distribution networks. The proposed algorithm utilizes sequential Monte Carlo method in order to accurately consider the stochastic nature of photovoltaic based distributed generators. The proposed algorithm is implemented in MATLAB environment and the results obtained are presented and discussed. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=comulative%20distribution%20function" title="comulative distribution function">comulative distribution function</a>, <a href="https://publications.waset.org/abstracts/search?q=distributed%20generation" title=" distributed generation"> distributed generation</a>, <a href="https://publications.waset.org/abstracts/search?q=Monte%20Carlo" title=" Monte Carlo"> Monte Carlo</a> </p> <a href="https://publications.waset.org/abstracts/28459/a-novel-probablistic-strategy-for-modeling-photovoltaic-based-distributed-generators" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/28459.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">584</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">117</span> Optimal Planning of Dispatchable Distributed Generators for Power Loss Reduction in Unbalanced Distribution Networks</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mahmoud%20M.%20Othman">Mahmoud M. Othman</a>, <a href="https://publications.waset.org/abstracts/search?q=Y.%20G.%20Hegazy"> Y. G. Hegazy</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Y.%20Abdelaziz"> A. Y. Abdelaziz </a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper proposes a novel heuristic algorithm that aims to determine the best size and location of distributed generators in unbalanced distribution networks. The proposed heuristic algorithm can deal with the planning cases where power loss is to be optimized without violating the system practical constraints. The distributed generation units in the proposed algorithm is modeled as voltage controlled node with the flexibility to be converted to constant power factor node in case of reactive power limit violation. The proposed algorithm is implemented in MATLAB and tested on the IEEE 37 -node feeder. The results obtained show the effectiveness of the proposed algorithm. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=distributed%20generation" title="distributed generation">distributed generation</a>, <a href="https://publications.waset.org/abstracts/search?q=heuristic%20approach" title=" heuristic approach"> heuristic approach</a>, <a href="https://publications.waset.org/abstracts/search?q=optimization" title=" optimization"> optimization</a>, <a href="https://publications.waset.org/abstracts/search?q=planning" title=" planning"> planning</a> </p> <a href="https://publications.waset.org/abstracts/31208/optimal-planning-of-dispatchable-distributed-generators-for-power-loss-reduction-in-unbalanced-distribution-networks" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/31208.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">524</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">116</span> A Firefly Based Optimization Technique for Optimal Planning of Voltage Controlled Distributed Generators </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20M.%20Othman">M. M. Othman</a>, <a href="https://publications.waset.org/abstracts/search?q=Walid%20El-Khattam"> Walid El-Khattam</a>, <a href="https://publications.waset.org/abstracts/search?q=Y.%20G.%20Hegazy"> Y. G. Hegazy</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Y.%20Abdelaziz"> A. Y. Abdelaziz</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper presents a method for finding the optimal location and capacity of dispatchable DGs connected to the distribution feeders for optimal planning for a specified power loss without violating the system practical constraints. The distributed generation units in the proposed algorithm is modeled as voltage controlled node with the flexibility to be converted to constant power node in case of reactive power limit violation. The proposed algorithm is implemented in MATLAB and tested on the IEEE 37-nodes feeder. The results that are validated by comparing it with results obtained from other competing methods show the effectiveness, accuracy and speed of the proposed method. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=distributed%20generators" title="distributed generators">distributed generators</a>, <a href="https://publications.waset.org/abstracts/search?q=firefly%20technique" title=" firefly technique"> firefly technique</a>, <a href="https://publications.waset.org/abstracts/search?q=optimization" title=" optimization"> optimization</a>, <a href="https://publications.waset.org/abstracts/search?q=power%20loss" title=" power loss"> power loss</a> </p> <a href="https://publications.waset.org/abstracts/6598/a-firefly-based-optimization-technique-for-optimal-planning-of-voltage-controlled-distributed-generators" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/6598.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">533</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">115</span> Optimal Sizing and Placement of Distributed Generators for Profit Maximization Using Firefly Algorithm</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Engy%20Adel%20Mohamed">Engy Adel Mohamed</a>, <a href="https://publications.waset.org/abstracts/search?q=Yasser%20Gamal-Eldin%20Hegazy"> Yasser Gamal-Eldin Hegazy</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper presents a firefly based algorithm for optimal sizing and allocation of distributed generators for profit maximization. Distributed generators in the proposed algorithm are of photovoltaic and combined heat and power technologies. Combined heat and power distributed generators are modeled as voltage controlled nodes while photovoltaic distributed generators are modeled as constant power nodes. The proposed algorithm is implemented in MATLAB environment and tested the unbalanced IEEE 37-node feeder. The results show the effectiveness of the proposed algorithm in optimal selection of distributed generators size and site in order to maximize the total system profit. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=distributed%20generators" title="distributed generators">distributed generators</a>, <a href="https://publications.waset.org/abstracts/search?q=firefly%20algorithm" title=" firefly algorithm"> firefly algorithm</a>, <a href="https://publications.waset.org/abstracts/search?q=IEEE%2037-node%20feeder" title=" IEEE 37-node feeder"> IEEE 37-node feeder</a>, <a href="https://publications.waset.org/abstracts/search?q=profit%20maximization" title=" profit maximization"> profit maximization</a> </p> <a href="https://publications.waset.org/abstracts/6198/optimal-sizing-and-placement-of-distributed-generators-for-profit-maximization-using-firefly-algorithm" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/6198.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">442</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">114</span> Revisionism in Literature: Deconstructing Patriarchal Ideals in Margaret Atwood's The Penelopiad</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Essam%20Abdelhamid%20Hegazy">Essam Abdelhamid Hegazy</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper aims to read Margaret Atwood's The Penelopiad (2005) via a revisionist and deconstructive approach. This novel is a postmodernist exploration of the grand-narrative myth The Odyssey (800 BC) by Homer, who portrayed the heroic warrior and the faithful wife as the epitome of perfect male and female models _examples whom all must follow and mimic. In Atwood's narrative, the same two hero models are the two great tricksters who are willing to perform any sort of obnoxious act for achieving their goals. This research tries to examine how Atwood tried to synthesize the change in character’s narratives leading to the humanization of the perfect hero and the ideal wife. The researcher has used a multidisciplinary approach where the feminist, revisionist and deconstructive theories were implemented to identify and find out the new interpretations of the myths that center the experiences and perspectives of women. Research findings are that revisionist approach was applied through giving an opportunity to the victimized and the voiceless to speak out and retaliate against their prosecutions. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=margret%20atwood" title="margret atwood">margret atwood</a>, <a href="https://publications.waset.org/abstracts/search?q=patriarchal" title=" patriarchal"> patriarchal</a>, <a href="https://publications.waset.org/abstracts/search?q=penelopiad" title=" penelopiad"> penelopiad</a>, <a href="https://publications.waset.org/abstracts/search?q=revisionism" title=" revisionism"> revisionism</a> </p> <a href="https://publications.waset.org/abstracts/168755/revisionism-in-literature-deconstructing-patriarchal-ideals-in-margaret-atwoods-the-penelopiad" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/168755.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">81</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">113</span> Seed Germination and Recovery Responses of Suaeda Heterophylla to Abiotic Stresses</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Abdul%20Hameed">Abdul Hameed</a>, <a href="https://publications.waset.org/abstracts/search?q=Muhammad%20Zaheer%20Ahmed"> Muhammad Zaheer Ahmed</a>, <a href="https://publications.waset.org/abstracts/search?q=Salman%20Gulzar"> Salman Gulzar</a>, <a href="https://publications.waset.org/abstracts/search?q=Bilquees%20Gul"> Bilquees Gul</a>, <a href="https://publications.waset.org/abstracts/search?q=Jan%20Alam"> Jan Alam</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmad%20K.%20Hegazy"> Ahmad K. Hegazy</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdel%20Rehman%20A.%20Alatar"> Abdel Rehman A. Alatar</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Ajmal%20Khan"> M. Ajmal Khan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Seed germination and recovery from salt stress of an annual halophyte Suaeda heterophylla (Kar. and Kir.) Bunge to different iso-osmotic concentrations (0, -0.46, -0.92, -1.38, -1.84, and -2.30 MPa) of NaCl and PEG-6000 at 15/25, 20/30 and 25/35°C in both 12-h temperature and light regimes and in complete darkness were studied. Maximum number of seeds germinated in distilled water and increase in concentrations of both NaCl and PEG-6000 decreased germination at all temperature regimes, light and dark conditions, with higher inhibition in NaCl than PEG-6000. Recovery of germination and viability of seeds were lower in NaCl than PEG-6000 both in the light and dark. Moderate alternate temperatures (20/30°C) and 12-h photoperiod were found to be the optimal for seed germination and recovery. Better seed germination of S. heterophylla when osmotic potential caused both by NaCl and PEG 6000 is lower, temperature regime of 20/30°C and light regime is for 12 h. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=seed%20germination" title="seed germination">seed germination</a>, <a href="https://publications.waset.org/abstracts/search?q=abiotic%20stresses" title=" abiotic stresses"> abiotic stresses</a>, <a href="https://publications.waset.org/abstracts/search?q=Suaeda%20heterophylla" title=" Suaeda heterophylla"> Suaeda heterophylla</a>, <a href="https://publications.waset.org/abstracts/search?q=molecular%20biology" title=" molecular biology"> molecular biology</a> </p> <a href="https://publications.waset.org/abstracts/2254/seed-germination-and-recovery-responses-of-suaeda-heterophylla-to-abiotic-stresses" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/2254.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">438</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">112</span> Optimal Load Control Strategy in the Presence of Stochastically Dependent Renewable Energy Sources</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mahmoud%20M.%20Othman">Mahmoud M. Othman</a>, <a href="https://publications.waset.org/abstracts/search?q=Almoataz%20Y.%20Abdelaziz"> Almoataz Y. Abdelaziz</a>, <a href="https://publications.waset.org/abstracts/search?q=Yasser%20G.%20Hegazy"> Yasser G. Hegazy</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper presents a load control strategy based on modification of the Big Bang Big Crunch optimization method. The proposed strategy aims to determine the optimal load to be controlled and the corresponding time of control in order to minimize the energy purchased from substation. The presented strategy helps the distribution network operator to rely on the renewable energy sources in supplying the system demand. The renewable energy sources used in the presented study are modeled using the diagonal band Copula method and sequential Monte Carlo method in order to accurately consider the multivariate stochastic dependence between wind power, photovoltaic power and the system demand. The proposed algorithms are implemented in MATLAB environment and tested on the IEEE 37-node feeder. Several case studies are done and the subsequent discussions show the effectiveness of the proposed algorithm. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=big%20bang%20big%20crunch" title="big bang big crunch">big bang big crunch</a>, <a href="https://publications.waset.org/abstracts/search?q=distributed%20generation" title=" distributed generation"> distributed generation</a>, <a href="https://publications.waset.org/abstracts/search?q=load%20control" title=" load control"> load control</a>, <a href="https://publications.waset.org/abstracts/search?q=optimization" title=" optimization"> optimization</a>, <a href="https://publications.waset.org/abstracts/search?q=planning" title=" planning"> planning</a> </p> <a href="https://publications.waset.org/abstracts/44666/optimal-load-control-strategy-in-the-presence-of-stochastically-dependent-renewable-energy-sources" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/44666.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">344</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">111</span> Modelling and Technical Assessment of Multi-Motor for Electric Vehicle Drivetrains by Using Electric Differential</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Abdel-Monem">Mohamed Abdel-Monem</a>, <a href="https://publications.waset.org/abstracts/search?q=Gamal%20Sowilam"> Gamal Sowilam</a>, <a href="https://publications.waset.org/abstracts/search?q=Omar%20Hegazy"> Omar Hegazy</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper presents a technical assessment of an electric vehicle with two independent rear-wheel motor and an improved traction control system. The electric differential and the control strategy have been implemented to assure that in a straight trajectory, the two rear-wheels run exactly at the same speed, considering the same/different road conditions under the left and right side of the wheels. In case of turning to right/left, the difference between the two rear-wheels speeds assures a vehicle trajectory without sliding, thanks to a harmony between the electric differential and the control strategy. The present article demonstrates a complete model and analysis of a traction control system, considering four different traction scenarios, for two independent rear-wheels motors for electric vehicles. Furthermore, the vehicle model, including wheel dynamics, load forces, electric differential, and control strategy, is designed and verified by using MATLAB/Simulink environment. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=electric%20vehicle" title="electric vehicle">electric vehicle</a>, <a href="https://publications.waset.org/abstracts/search?q=energy%20saving" title=" energy saving"> energy saving</a>, <a href="https://publications.waset.org/abstracts/search?q=multi-motor" title=" multi-motor"> multi-motor</a>, <a href="https://publications.waset.org/abstracts/search?q=electric%20differential" title=" electric differential"> electric differential</a>, <a href="https://publications.waset.org/abstracts/search?q=simulation%20and%20control" title=" simulation and control"> simulation and control</a> </p> <a href="https://publications.waset.org/abstracts/90576/modelling-and-technical-assessment-of-multi-motor-for-electric-vehicle-drivetrains-by-using-electric-differential" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/90576.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">351</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">110</span> Conversion of Carcinogenic Liquid-Wastes of Poly Vinyl Chloride (PVC) Industry to ‎an Environmentally Safe Product: Corrosion Inhibitor and Biocide</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20A.%20Hegazy">Mohamed A. Hegazy</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Most of Poly Vinyl Chloride (PVC) petrochemical companies produce huge amount of byproduct which characterized as carcinogenic liquid-wastes, insoluble in water, highly corrosive and highly offensive. This byproduct is partially use, a small part, in the production of hydrochloric acid and the huge part is a waste. Therefore, the aim of this work was to conversion of such PVC wastes, to an environmentally safe product that act as a corrosion Inhibitor for metals in ‎aqueous media and as a biocide for microorganisms. This conversion method was accomplished mainly to protect the environment and to produce high economic value-products. The conversion process was established and the final product was tested for the toxicity, water solubility in comparison to the crude product. Furthermore, the end product was tested as a corrosion inhibitor in 1M HCl and as a broad-spectrum biocide against standard microbial strains and against the environmentally isolated Sulfate-reducing bacteria (SRB) microbial community. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=PVC" title="PVC">PVC</a>, <a href="https://publications.waset.org/abstracts/search?q=surfactant" title=" surfactant"> surfactant</a>, <a href="https://publications.waset.org/abstracts/search?q=corrosion%20inhibitor" title=" corrosion inhibitor"> corrosion inhibitor</a>, <a href="https://publications.waset.org/abstracts/search?q=biocide" title=" biocide"> biocide</a>, <a href="https://publications.waset.org/abstracts/search?q=SRB" title=" SRB"> SRB</a> </p> <a href="https://publications.waset.org/abstracts/127122/conversion-of-carcinogenic-liquid-wastes-of-poly-vinyl-chloride-pvc-industry-to-an-environmentally-safe-product-corrosion-inhibitor-and-biocide" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/127122.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">123</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">109</span> Comparative Studies of Modified Clay/Polyaniline Nanocomposites</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Fatima%20Zohra%20Zeggai">Fatima Zohra Zeggai</a>, <a href="https://publications.waset.org/abstracts/search?q=Benjamin%20Carbonnier"> Benjamin Carbonnier</a>, <a href="https://publications.waset.org/abstracts/search?q=A%C3%AFcha%20Hachemaoui"> Aïcha Hachemaoui</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20Yahiaoui"> Ahmed Yahiaoui</a>, <a href="https://publications.waset.org/abstracts/search?q=Samia%20Mahouche-Chergui"> Samia Mahouche-Chergui</a>, <a href="https://publications.waset.org/abstracts/search?q=Zakaria%20Salmi"> Zakaria Salmi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A series of polyaniline (PANI)/modified Montmorillonite (MMT) Clay nanocomposite materials have been successfully prepared by In-Situ polymerization in the presence of modified MMT-Clay or Diazonium-MMT-Clay. The obtained nanocomposites were characterized and compared by various physicochemical techniques. The presence of physicochemical interaction, probably hydrogen bonding, between clay and polyaniline, which was confirmed by FTIR, UV-Vis Spectroscopy. The electrical conductivity of neat PANI and a series of the obtained nanocomposites were also studied by cyclic voltammograms. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=polyaniline" title="polyaniline">polyaniline</a>, <a href="https://publications.waset.org/abstracts/search?q=clay" title=" clay"> clay</a>, <a href="https://publications.waset.org/abstracts/search?q=nanocomposites" title=" nanocomposites"> nanocomposites</a>, <a href="https://publications.waset.org/abstracts/search?q=in-situ%20polymerization" title=" in-situ polymerization"> in-situ polymerization</a>, <a href="https://publications.waset.org/abstracts/search?q=polymers%20conductors" title=" polymers conductors"> polymers conductors</a>, <a href="https://publications.waset.org/abstracts/search?q=diazonium%20salt" title=" diazonium salt"> diazonium salt</a> </p> <a href="https://publications.waset.org/abstracts/17853/comparative-studies-of-modified-claypolyaniline-nanocomposites" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/17853.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">471</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">108</span> Technical Assessment of Utilizing Electrical Variable Transmission Systems in Hybrid Electric Vehicles</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Majid%20Vafaeipour">Majid Vafaeipour</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20El%20Baghdadi"> Mohamed El Baghdadi</a>, <a href="https://publications.waset.org/abstracts/search?q=Florian%20Verbelen"> Florian Verbelen</a>, <a href="https://publications.waset.org/abstracts/search?q=Peter%20Sergeant"> Peter Sergeant</a>, <a href="https://publications.waset.org/abstracts/search?q=Joeri%20Van%20Mierlo"> Joeri Van Mierlo</a>, <a href="https://publications.waset.org/abstracts/search?q=Kurt%20Stockman"> Kurt Stockman</a>, <a href="https://publications.waset.org/abstracts/search?q=Omar%20Hegazy"> Omar Hegazy</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The Electrical Variable Transmission (EVT), an electromechanical device, can be considered as an alternative solution to the conventional transmission system utilized in Hybrid Electric Vehicles (HEVs). This study present comparisons in terms of fuel consumption, power split, and state of charge (SoC) of an HEV containing an EVT to a conventional parallel topology and a series topology. To this end, corresponding simulations of these topologies are all performed in presence of control strategies enabling battery charge-sustaining and efficient power split. The power flow through the components of the vehicle are attained, and fuel consumption results of the considered cases are compared. The investigation of the results indicates utilizing EVT can provide significant added values in HEV configurations. The outcome of the current research paves its path for implementation of design optimization approaches on such systems in further research directions. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Electrical%20Variable%20Transmission%20%28EVT%29" title="Electrical Variable Transmission (EVT)">Electrical Variable Transmission (EVT)</a>, <a href="https://publications.waset.org/abstracts/search?q=Hybrid%20Electric%20Vehicle%20%28HEV%29" title=" Hybrid Electric Vehicle (HEV)"> Hybrid Electric Vehicle (HEV)</a>, <a href="https://publications.waset.org/abstracts/search?q=parallel" title=" parallel"> parallel</a>, <a href="https://publications.waset.org/abstracts/search?q=series" title=" series"> series</a>, <a href="https://publications.waset.org/abstracts/search?q=modeling" title=" modeling"> modeling</a> </p> <a href="https://publications.waset.org/abstracts/91288/technical-assessment-of-utilizing-electrical-variable-transmission-systems-in-hybrid-electric-vehicles" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/91288.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">238</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">107</span> An Analysis of Turn-Taking in ESL Classrooms</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nursuhaila%20Ibrahim">Nursuhaila Ibrahim</a>, <a href="https://publications.waset.org/abstracts/search?q=Noor%20Hanim%20Rahmat"> Noor Hanim Rahmat</a>, <a href="https://publications.waset.org/abstracts/search?q=Nurul%20Ain%20Hasni"> Nurul Ain Hasni</a>, <a href="https://publications.waset.org/abstracts/search?q=Nursyuhada%20Zakaria"> Nursyuhada Zakaria</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Past studies have shown that class discussions in the ESL classrooms not only helped students exchange ideas with their peers. Students also learn turn taking skills throughout the discussion. Through interacting with their peers, learners learn to use turn-taking strategies. They learn to wait for their turn, to listen to the ideas of others, to disagree, or to agree, and to add on more points in the conversation. This quantitative research explores students’ perception on class discussions and how the discussions influence their choice of turn-taking strategies. Findings of this research will have interesting implications towards the use of class discussions in the ESL classrooms. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ESL" title="ESL">ESL</a>, <a href="https://publications.waset.org/abstracts/search?q=class%20discussions" title=" class discussions"> class discussions</a>, <a href="https://publications.waset.org/abstracts/search?q=turn-taking%20skills" title=" turn-taking skills"> turn-taking skills</a>, <a href="https://publications.waset.org/abstracts/search?q=peers" title=" peers"> peers</a> </p> <a href="https://publications.waset.org/abstracts/28276/an-analysis-of-turn-taking-in-esl-classrooms" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/28276.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">493</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">106</span> Energy Efficiency Factors in Toll Plazas</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20Balubaid">S. Balubaid</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Z.%20Abd%20Majid"> M. Z. Abd Majid</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20Zakaria"> R. Zakaria</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Energy efficiency is one of the most important issues for green buildings and their sustainability. This is not only due to the environmental impacts, but also because of significantly high energy cost. The aim of this study is to identify the potential actions required for toll plaza that lead to energy reduction. The data were obtained through set of questionnaire and interviewing targeted respondents, including the employees at toll plaza, and architects and engineers who are directly involved in design of highway projects. The data was analyzed using descriptive statistics analysis method. The findings of this study are the critical elements that influence the energy usage and factors that lead to energy wastage. Finally, potential actions are recommended to reduce energy consumption in toll plazas. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=energy%20efficiency" title="energy efficiency">energy efficiency</a>, <a href="https://publications.waset.org/abstracts/search?q=toll%20plaza" title=" toll plaza"> toll plaza</a>, <a href="https://publications.waset.org/abstracts/search?q=energy%20consumption" title=" energy consumption"> energy consumption</a> </p> <a href="https://publications.waset.org/abstracts/14229/energy-efficiency-factors-in-toll-plazas" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/14229.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">547</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">105</span> Towards Value-Based Healthcare through a Nursing Sector Management Approach</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hadeer%20Hegazy">Hadeer Hegazy</a>, <a href="https://publications.waset.org/abstracts/search?q=Wael%20Ewieda"> Wael Ewieda</a>, <a href="https://publications.waset.org/abstracts/search?q=Ranin%20Soliman"> Ranin Soliman</a>, <a href="https://publications.waset.org/abstracts/search?q=Samah%20Elway"> Samah Elway</a>, <a href="https://publications.waset.org/abstracts/search?q=Asmaa%20Tawfik"> Asmaa Tawfik</a>, <a href="https://publications.waset.org/abstracts/search?q=Ragaa%20Sayed"> Ragaa Sayed</a>, <a href="https://publications.waset.org/abstracts/search?q=Sahar%20Mousa"> Sahar Mousa</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The current healthcare system is facing major challenges in terms of cost, quality of care, and access to services. In response, the concept of value-based healthcare has emerged as a new approach to healthcare delivery. This concept puts the focus on patient values rather than on the traditional medical model of care. To achieve this, healthcare organizations must be agile and able to anticipate and respond quickly to changing needs. Agile management is essential for healthcare organizations to achieve value-based care, as it allows them to rapidly adjust their strategies to changing circumstances. Additionally, it is argued that agile management can help healthcare organizations gain a better understanding of the needs of their patients and develop better care delivery models. Besides, it can help healthcare organizations develop new services, innovate, and become more efficient. The authors provide evidence to support their argument, drawing on examples from successful value-based healthcare initiatives at children’s cancer hospital Egypt-57357. The paper offers insight into how agile management can be used to facilitate the shift towards value-based healthcare and how it can be used to maximize value in the healthcare system. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=value-based%20healthcare" title="value-based healthcare">value-based healthcare</a>, <a href="https://publications.waset.org/abstracts/search?q=agility%20in%20healthcare" title=" agility in healthcare"> agility in healthcare</a>, <a href="https://publications.waset.org/abstracts/search?q=nursing%20department" title=" nursing department"> nursing department</a>, <a href="https://publications.waset.org/abstracts/search?q=patients%20outcomes" title=" patients outcomes"> patients outcomes</a> </p> <a href="https://publications.waset.org/abstracts/165268/towards-value-based-healthcare-through-a-nursing-sector-management-approach" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/165268.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">767</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">104</span> Effect of Carbon Nanotubes on Nanocomposite from Nanofibrillated Cellulose</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20Z.%20Shazana">M. Z. Shazana</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20Rosazley"> R. Rosazley</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20A.%20Izzati"> M. A. Izzati</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20W.%20Fareezal"> A. W. Fareezal</a>, <a href="https://publications.waset.org/abstracts/search?q=I.%20Rushdan"> I. Rushdan</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20B.%20Suriani"> A. B. Suriani</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Zakaria"> S. Zakaria</a> </p> <p class="card-text"><strong>Abstract:</strong></p> There is an increasing interest in the development of flexible energy storage for application of Carbon Nanotubes and nanofibrillated cellulose (NFC). In this study, nanocomposite is consisting of Carbon Nanotube (CNT) mixed with suspension of nanofibrillated cellulose (NFC) from Oil Palm Empty Fruit Bunch (OPEFB). The use of Carbon Nanotube (CNT) as additive nanocomposite was improved the conductivity and mechanical properties of nanocomposite from nanofibrillated cellulose (NFC). The nanocomposite were characterized for electrical conductivity and mechanical properties in uniaxial tension, which were tensile to measure the bond of fibers in nanocomposite. The processing route is environmental friendly which leads to well-mixed structures and good results as well. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=carbon%20nanotube%20%28CNT%29" title="carbon nanotube (CNT)">carbon nanotube (CNT)</a>, <a href="https://publications.waset.org/abstracts/search?q=nanofibrillated%20cellulose%20%28NFC%29" title=" nanofibrillated cellulose (NFC)"> nanofibrillated cellulose (NFC)</a>, <a href="https://publications.waset.org/abstracts/search?q=mechanical%20properties" title=" mechanical properties"> mechanical properties</a>, <a href="https://publications.waset.org/abstracts/search?q=electrical%20conductivity" title=" electrical conductivity"> electrical conductivity</a> </p> <a href="https://publications.waset.org/abstracts/16843/effect-of-carbon-nanotubes-on-nanocomposite-from-nanofibrillated-cellulose" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/16843.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">334</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">103</span> Coupled Spacecraft Orbital and Attitude Modeling and Simulation in Multi-Complex Modes</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Amr%20Abdel%20Azim%20Ali">Amr Abdel Azim Ali</a>, <a href="https://publications.waset.org/abstracts/search?q=G.%20A.%20Elsheikh"> G. A. Elsheikh</a>, <a href="https://publications.waset.org/abstracts/search?q=Moutaz%20Hegazy"> Moutaz Hegazy</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper presents verification of a modeling and simulation for a Spacecraft (SC) attitude and orbit control system. Detailed formulation of coupled SC orbital and attitude equations of motion is performed in order to achieve accepted accuracy to meet the requirements of multitargets tracking and orbit correction complex modes. Correction of the target parameter based on the estimated state vector during shooting time to enhance pointing accuracy is considered. Time-optimal nonlinear feedback control technique was used in order to take full advantage of the maximum torques that the controller can deliver. This simulation provides options for visualizing SC trajectory and attitude in a 3D environment by including an interface with V-Realm Builder and VR Sink in Simulink/MATLAB. Verification data confirms the simulation results, ensuring that the model and the proposed control law can be used successfully for large and fast tracking and is robust enough to keep the pointing accuracy within the desired limits with considerable uncertainty in inertia and control torque. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=attitude%20and%20orbit%20control" title="attitude and orbit control">attitude and orbit control</a>, <a href="https://publications.waset.org/abstracts/search?q=time-optimal%20nonlinear%20feedback%20control" title=" time-optimal nonlinear feedback control"> time-optimal nonlinear feedback control</a>, <a href="https://publications.waset.org/abstracts/search?q=modeling%20and%20simulation" title=" modeling and simulation"> modeling and simulation</a>, <a href="https://publications.waset.org/abstracts/search?q=pointing%20accuracy" title=" pointing accuracy"> pointing accuracy</a>, <a href="https://publications.waset.org/abstracts/search?q=maximum%20torques" title=" maximum torques"> maximum torques</a> </p> <a href="https://publications.waset.org/abstracts/59362/coupled-spacecraft-orbital-and-attitude-modeling-and-simulation-in-multi-complex-modes" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/59362.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">331</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">102</span> Importance-Implementation of Disability Management Practices in Hotels: The Moderating Effect of Team Orientation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Zakaria%20Elkhwesky">Zakaria Elkhwesky</a>, <a href="https://publications.waset.org/abstracts/search?q=Islam%20E.%20Salem"> Islam E. Salem</a>, <a href="https://publications.waset.org/abstracts/search?q=Mona%20Barakat"> Mona Barakat</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The purpose of this study is to analyze the importance of disability management practices (DMPs) and the level of implementation from viewpoints of food and beverage (F & B) managers, F and B entry-level employees, working in F & B departments, and human resources (HRs) managers in five-star hotels in Egypt. It also examined the moderating effect of team orientation (TO) between the importance and the implementation. Data were collected from 400 participants. The correlation proved to be significant, moderate, and positive between the importance and the implementation of DMPs. More, the findings revealed that the relationship between the importance and the implementation is significantly more positive under the condition of a high encouragement of TO. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=disability%20management%20practices" title="disability management practices">disability management practices</a>, <a href="https://publications.waset.org/abstracts/search?q=diversity%20management" title=" diversity management"> diversity management</a>, <a href="https://publications.waset.org/abstracts/search?q=team%20orientation" title=" team orientation"> team orientation</a>, <a href="https://publications.waset.org/abstracts/search?q=HR%20management" title=" HR management"> HR management</a>, <a href="https://publications.waset.org/abstracts/search?q=hospitality" title=" hospitality"> hospitality</a>, <a href="https://publications.waset.org/abstracts/search?q=and%20tourism%20operations" title=" and tourism operations"> and tourism operations</a> </p> <a href="https://publications.waset.org/abstracts/117602/importance-implementation-of-disability-management-practices-in-hotels-the-moderating-effect-of-team-orientation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/117602.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">123</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">101</span> Free Vibration Analysis of Symmetric Sandwich Beams</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ibnorachid%20Zakaria">Ibnorachid Zakaria</a>, <a href="https://publications.waset.org/abstracts/search?q=El%20Bikri%20Khalid"> El Bikri Khalid</a>, <a href="https://publications.waset.org/abstracts/search?q=Benamar%20Rhali"> Benamar Rhali</a>, <a href="https://publications.waset.org/abstracts/search?q=Farah%20Abdoun"> Farah Abdoun</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The aim of the present work is to study the linear free symmetric vibration of three-layer sandwich beam using the energy method. The zigzag model is used to describe the displacement field. The theoretical model is based on the top and bottom layers behave like Euler-Bernoulli beams while the core layer like a Timoshenko beam. Based on Hamilton’s principle, the governing equation of motion sandwich beam is obtained in order to calculate the linear frequency parameters for a clamped-clamped and simple supported-simple-supported beams. The effects of material properties and geometric parameters on the natural frequencies are also investigated. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=linear%20vibration" title="linear vibration">linear vibration</a>, <a href="https://publications.waset.org/abstracts/search?q=sandwich" title=" sandwich"> sandwich</a>, <a href="https://publications.waset.org/abstracts/search?q=shear%20deformation" title=" shear deformation"> shear deformation</a>, <a href="https://publications.waset.org/abstracts/search?q=Timoshenko%20zig-zag%20model" title=" Timoshenko zig-zag model"> Timoshenko zig-zag model</a> </p> <a href="https://publications.waset.org/abstracts/20383/free-vibration-analysis-of-symmetric-sandwich-beams" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/20383.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">474</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">100</span> Geometrically Linear Symmetric Free Vibration Analysis of Sandwich Beam </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ibnorachid%20Zakaria">Ibnorachid Zakaria</a>, <a href="https://publications.waset.org/abstracts/search?q=El%20Bikri%20Khalid"> El Bikri Khalid</a>, <a href="https://publications.waset.org/abstracts/search?q=Benamar%20Rhali"> Benamar Rhali</a>, <a href="https://publications.waset.org/abstracts/search?q=Farah%20Abdoun"> Farah Abdoun</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The aim of the present work is to study the linear free symmetric vibration of three-layer sandwich beam using the energy method. The zigzag model is used to describe the displacement field. The theoretical model is based on the top and bottom layers behave like Euler-Bernoulli beams while the core layer like a Timoshenko beam. Based on Hamilton’s principle, the governing equation of motion sandwich beam is obtained in order to calculate the linear frequency parameters for a clamped-clamped and simple supported-simple-supported beams. The effects of material properties and geometric parameters on the natural frequencies are also investigated. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=linear%20vibration" title="linear vibration">linear vibration</a>, <a href="https://publications.waset.org/abstracts/search?q=sandwich" title=" sandwich"> sandwich</a>, <a href="https://publications.waset.org/abstracts/search?q=shear%20deformation" title=" shear deformation"> shear deformation</a>, <a href="https://publications.waset.org/abstracts/search?q=Timoshenko%20zig-zag%20model" title=" Timoshenko zig-zag model"> Timoshenko zig-zag model</a> </p> <a href="https://publications.waset.org/abstracts/19506/geometrically-linear-symmetric-free-vibration-analysis-of-sandwich-beam" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/19506.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">472</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">99</span> Experimental Study of a Solar Still with Four Glass Cover</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Zakaria%20Haddad">Zakaria Haddad</a>, <a href="https://publications.waset.org/abstracts/search?q=Azzedine%20Nahoui"> Azzedine Nahoui</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Salmi"> Mohamed Salmi</a>, <a href="https://publications.waset.org/abstracts/search?q=Ali%20Djagham"> Ali Djagham</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Solar distillation is an effective and practical method for the production of drinking water in arid and semi-arid areas; however, this production is very limited. The aim of this work is to increase the latter by means of single slope solar still with four glass cover without augmenting volume and surface of a conventional solar still, using local materials and simple design. The equipment was tested under the climatic condition of Msila city (35°70′ N, 4°54′ E), Algeria. Performance of the use of four glass cover was studied, and exhaustive data were collected, analyzed, and presented. To show the effectiveness of the system, its performance was compared with that of the conventional solar still. The experimental study shows that the production of the proposed system achieves 5.3 l/m²/day and 5.8 l/m²/day respectively for the months of April and May, with an increase of 10% and 17% compared to the conventional solar still. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=drinking%20water" title="drinking water">drinking water</a>, <a href="https://publications.waset.org/abstracts/search?q=four%20glass%20cover" title=" four glass cover"> four glass cover</a>, <a href="https://publications.waset.org/abstracts/search?q=production" title=" production"> production</a>, <a href="https://publications.waset.org/abstracts/search?q=solar%20distillation" title=" solar distillation"> solar distillation</a> </p> <a href="https://publications.waset.org/abstracts/117910/experimental-study-of-a-solar-still-with-four-glass-cover" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/117910.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">137</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">98</span> Language and Empire: A Post-Colonial Examination of Othering and Identity in Babel: An Arcane History</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Essam%20Hegazy">Essam Hegazy</a> </p> <p class="card-text"><strong>Abstract:</strong></p> English has solidified its role as the global lingua franca, largely due to British colonial expansion. This research investigates the use of English as a tool for Empire-building and the subjugation of colonized peoples and their languages. The objective is to examine how linguistic Anglo-hegemony contributes to the construction of otherness and identity formation, and how these processes are depicted in R.F. Kuang's novel Babel: An Arcane History. Using a post-colonial theoretical framework, this study employs textual analysis to explore the novel's portrayal of characters' conflicting loyalties to their native cultures and the British Empire. Key methods include identifying themes of linguistic dominance, othering, and identity conflict through close reading and annotation. The analysis is contextualized with historical and cultural perspectives to understand the broader implications of these themes. The findings reveal that linguistic hegemony is a central mechanism of colonial power, deeply affecting the characters' sense of identity and belonging. The study uncovers how the imposition of English creates internalized conflicts and reinforces social hierarchies. This research highlights the need to challenge hegemonic structures to preserve authentic identities and promote cultural diversity. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=linguistic%20hegemony" title="linguistic hegemony">linguistic hegemony</a>, <a href="https://publications.waset.org/abstracts/search?q=otherness" title=" otherness"> otherness</a>, <a href="https://publications.waset.org/abstracts/search?q=identity%20formation" title=" identity formation"> identity formation</a>, <a href="https://publications.waset.org/abstracts/search?q=colonialism" title=" colonialism"> colonialism</a>, <a href="https://publications.waset.org/abstracts/search?q=imperialism" title=" imperialism"> imperialism</a> </p> <a href="https://publications.waset.org/abstracts/189152/language-and-empire-a-post-colonial-examination-of-othering-and-identity-in-babel-an-arcane-history" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/189152.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">23</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">97</span> Advanced Nanostructured Materials and Their Application for Solar Fuel</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20Hegazy">A. Hegazy</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20Elsayed"> Ahmed Elsayed</a>, <a href="https://publications.waset.org/abstracts/search?q=Essam%20El%20Shenawy"> Essam El Shenawy</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20Allam"> N. Allam</a>, <a href="https://publications.waset.org/abstracts/search?q=Hala%20Handal"> Hala Handal</a>, <a href="https://publications.waset.org/abstracts/search?q=K.%20R.%20Mahmoud"> K. R. Mahmoud</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Highly crystalline, TiO₂ pristine sub-10 nm anatase nanocrystals were fabricated at low temperatures by post hydrothermal treatment of the as-prepared TiO₂ nanoparticles. This treatment resulted in bandgap narrowing and increased photocurrent density value (3.8 mA/cm²) when this material was employed in water splitting systems. The achieved photocurrent values are among the highest reported ones so far for the fabricated nanoparticles at this low temperature. This might be explained by the increased surface defects of the prepared nanoparticles. It resulted in bandgap narrowing that was further investigated using positron annihilation experiments by measuring positron lifetime and Doppler broadening. Besides, homogeneous spherical TiO₂ nanoparticles were synthesized in large diameter and high surface area and the high percentage of (001) facet by sol-gel method using potassium persulfate (K₂S₂O₈) as an oxidizing agent. The fabricated particles exhibited high exposed surface area, high photoactivity and reduced band gap. Enhanced performance for water splitting applications was displayed by formed TiO₂ nanoparticles. Their morphological and structural properties were studied to optimize their synthesis parameters in an attempt to construct more applicable fuel cells in the industry for hydrogen fuel production. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=positron%20annihilation" title="positron annihilation">positron annihilation</a>, <a href="https://publications.waset.org/abstracts/search?q=solar%20energy" title=" solar energy"> solar energy</a>, <a href="https://publications.waset.org/abstracts/search?q=TiO2%20nanoparticles" title=" TiO2 nanoparticles"> TiO2 nanoparticles</a>, <a href="https://publications.waset.org/abstracts/search?q=water%20splitting" title=" water splitting"> water splitting</a> </p> <a href="https://publications.waset.org/abstracts/124606/advanced-nanostructured-materials-and-their-application-for-solar-fuel" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/124606.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">145</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">96</span> Grading of Emulsified Agarwood Oil Using Gel Electrophoresis Technique</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Y.%20T.%20Boon">Y. T. Boon</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20N.%20Naim"> M. N. Naim</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20Zakaria"> R. Zakaria</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20F.%20Abu%20Bakar"> N. F. Abu Bakar</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20Ahmad"> N. Ahmad</a>, <a href="https://publications.waset.org/abstracts/search?q=I.%20W.%20Lenggoro"> I. W. Lenggoro</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, encapsulation of agarwood oil with non-ionic surfactant, Tween 80 was prepared at critical micelle concentration of 0.0167 % v/v to produce the most stable nano-emulsion in aqueous. The encapsulation has minimized the bioactive compounds degradation in various pH conditions thus prolong their shelf life and maintained its initial oil grade. The oil grading of the prepared samples were conducted using the gel electrophoresis instead of using common analytical industrial grading such as gas chromatography- mass spectrometry (GC- MS). The grading method was chosen due to their unique zeta potential value after the encapsulation process. This paper demonstrates the feasibility of applying the electrophoresis principles to separate the encapsulated agarwood oil or grading of the emulsified agarwood oil. The results indicated that the grading process are potential to be further investigate based on their droplet size and zeta potential value at various pH condition when the droplet were migrate through polyacrylamide gel. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=electrophoretic%20mobility" title="electrophoretic mobility">electrophoretic mobility</a>, <a href="https://publications.waset.org/abstracts/search?q=essential%20oil" title=" essential oil"> essential oil</a>, <a href="https://publications.waset.org/abstracts/search?q=nanoemulsion" title=" nanoemulsion"> nanoemulsion</a>, <a href="https://publications.waset.org/abstracts/search?q=polyacrylamide%20gel%20electrophoresis" title=" polyacrylamide gel electrophoresis"> polyacrylamide gel electrophoresis</a>, <a href="https://publications.waset.org/abstracts/search?q=tween%2080" title=" tween 80"> tween 80</a>, <a href="https://publications.waset.org/abstracts/search?q=zeta%20potential" title=" zeta potential"> zeta potential</a> </p> <a href="https://publications.waset.org/abstracts/42940/grading-of-emulsified-agarwood-oil-using-gel-electrophoresis-technique" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/42940.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">380</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">95</span> Screening of Metal Chloride Anion-based Ionic Liquids for Direct Conversion of Hydrogen Sulfide by COSMO-RS</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Muhammad%20Syahir%20Aminuddin">Muhammad Syahir Aminuddin</a>, <a href="https://publications.waset.org/abstracts/search?q=Zakaria%20Man"> Zakaria Man</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamad%20Azmi%20Bustam%20Khalil"> Mohamad Azmi Bustam Khalil </a> </p> <p class="card-text"><strong>Abstract:</strong></p> In order to identify the best possible reaction media for performing H₂S conversion, a total number of 300 different ILs from a combination of 20 cations and 15 anions were screened via COSMO-RS model simulations. By COSMO-RS method, thermodynamic and physicochemical properties of 300 ILs, such as Henry's law constants, activity coefficient, selectivity, capacity, and performance index, are obtained and analyzed. Thus, by comparing the performance of ILs via COSMO-RS, a series of TSILs containing cation of [P66614] with metal chloride anions such as Fe, Ga, and Al were chosen and selected for synthesis based on their performance predicted by COSMO-RS and their economic values. Consequently, the physiochemical properties such as density, viscosity, thermal properties, as well as H₂S absorptive oxidation performances in those TSILs will be systematically investigated. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=conversion%20of%20hydrogen%20sulfide" title="conversion of hydrogen sulfide">conversion of hydrogen sulfide</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrogen%20sulfide" title=" hydrogen sulfide"> hydrogen sulfide</a>, <a href="https://publications.waset.org/abstracts/search?q=H%E2%82%82S" title=" H₂S"> H₂S</a>, <a href="https://publications.waset.org/abstracts/search?q=sour%20natural%20gas" title=" sour natural gas"> sour natural gas</a>, <a href="https://publications.waset.org/abstracts/search?q=task%20specific%20ionic%20liquids" title=" task specific ionic liquids"> task specific ionic liquids</a> </p> <a href="https://publications.waset.org/abstracts/128286/screening-of-metal-chloride-anion-based-ionic-liquids-for-direct-conversion-of-hydrogen-sulfide-by-cosmo-rs" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/128286.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">153</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">94</span> The Nursing Profession in Algeria between Humane Treatment and Work Environment Problems - A Field Study</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Bacha%20Zakaria">Bacha Zakaria</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study aimed to investigate the reality of humane treatment and work environment problems for nurses in public hospitals and their repercussions on the patients arriving there. In this curve, our field study was based on a sample of nurses in Algiers hospitals estimated at 100 nurses. The questionnaire prepared by the two researchers was applied face to face with the nurses, and after obtaining and analyzing the data, we concluded the most important results: The presence of many problems in the work environment, such as work pressures, lack of appreciation, verbal and physical violence, risk of infection, poor salary and incentives, working during fatigue, administrative problems etc. And accordingly, The embodiment of humane dealing with patients requires providing a humane work environment for nurses and dealing with them humanely so that they embody positive behaviors while dealing with patients. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=nursing" title="nursing">nursing</a>, <a href="https://publications.waset.org/abstracts/search?q=future" title=" future"> future</a>, <a href="https://publications.waset.org/abstracts/search?q=family-focused%20care" title=" family-focused care"> family-focused care</a>, <a href="https://publications.waset.org/abstracts/search?q=health%20equity" title=" health equity"> health equity</a> </p> <a href="https://publications.waset.org/abstracts/159573/the-nursing-profession-in-algeria-between-humane-treatment-and-work-environment-problems-a-field-study" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/159573.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">92</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">93</span> Effect of Different Carbon Fabric Orientations on the Fracture Properties of Carbon Fabric Reinforced Polymer Composites</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20F.%20Halim">S. F. Halim</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20F.%20Naguib"> H. F. Naguib</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20N.%20Lawandy"> S. N. Lawandy</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20S.%20Hegazy"> R. S. Hegazy</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20N.%20Baheg"> M. N. Baheg</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The main drawbacks of the traditional carbon fabric reinforced epoxy resin (CFRP) are low strain failure, delamination between composites layers, and low impact resistance due to the brittleness of epoxy resin. The aim of this study is to enhance the fracture properties of the CFRP composites laminates via the variation of composite's designs. A series of composites were fabricated in which bidirectional (00/900) carbon fabric (CF) layers were laid inside the resin matrix with orientation codes as F1 [(00, 900)/ (00, 900)], F2 [(900, 00)/ (00, 900)] and F3 [(00,900)/ (900, 00). The mechanical and dynamic properties of the composites were estimated. In addition, the morphology of samples surface was examined by scanning electron microscope (SEM) after impact fracture. The results revealed that the CFRP properties could be tailored fitting specific applications by controlling the fabric orientation inside the CFRP composite design. F2 orientation [(900, 00)/ (00.900)] showed the highest tensile and flexural strength values. On the other hand, the impact strength values of composites were in the order F1 > F2 > F3. The storage modulus, loss modulus, and glass transition temperature Tg values obtained from the dynamic mechanical analysis (DMA) examination was in the order F1 > F2 > F3. The variation in the properties of the composite was clearly explained by the SEM micrographs as the failure of F3 orientation properties was referred to as the complete breakage of the CF layers upon fracture. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=carbon%20fiber" title="carbon fiber">carbon fiber</a>, <a href="https://publications.waset.org/abstracts/search?q=CFRP" title=" CFRP"> CFRP</a>, <a href="https://publications.waset.org/abstracts/search?q=composites" title=" composites"> composites</a>, <a href="https://publications.waset.org/abstracts/search?q=epoxy%20resins" title=" epoxy resins"> epoxy resins</a>, <a href="https://publications.waset.org/abstracts/search?q=flexural%20strength" title=" flexural strength"> flexural strength</a> </p> <a href="https://publications.waset.org/abstracts/124057/effect-of-different-carbon-fabric-orientations-on-the-fracture-properties-of-carbon-fabric-reinforced-polymer-composites" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/124057.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">128</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">92</span> Modeling of the Attitude Control Reaction Wheels of a Spacecraft in Software in the Loop Test Bed</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Amr%20AbdelAzim%20Ali">Amr AbdelAzim Ali</a>, <a href="https://publications.waset.org/abstracts/search?q=G.%20A.%20Elsheikh"> G. A. Elsheikh</a>, <a href="https://publications.waset.org/abstracts/search?q=Moutaz%20M.%20Hegazy"> Moutaz M. Hegazy</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Reaction wheels (RWs) are generally used as main actuator in the attitude control system (ACS) of spacecraft (SC) for fast orientation and high pointing accuracy. In order to achieve the required accuracy for the RWs model, the main characteristics of the RWs that necessitate analysis during the ACS design phase include: technical features, sequence of operating and RW control logic are included in function (behavior) model. A mathematical model is developed including the various errors source. The errors in control torque including relative, absolute, and error due to time delay. While the errors in angular velocity due to differences between average and real speed, resolution error, loose in installation of angular sensor, and synchronization errors. The friction torque is presented in the model include the different feature of friction phenomena: steady velocity friction, static friction and break-away torque, and frictional lag. The model response is compared with the experimental torque and frequency-response characteristics of tested RWs. Based on the created RW model, some criteria of optimization based control torque allocation problem can be recommended like: avoiding the zero speed crossing, bias angular velocity, or preventing wheel from running on the same angular velocity. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=friction%20torque" title="friction torque">friction torque</a>, <a href="https://publications.waset.org/abstracts/search?q=reaction%20wheels%20modeling" title=" reaction wheels modeling"> reaction wheels modeling</a>, <a href="https://publications.waset.org/abstracts/search?q=software%20in%20the%20loop" title=" software in the loop"> software in the loop</a>, <a href="https://publications.waset.org/abstracts/search?q=spacecraft%20attitude%20control" title=" spacecraft attitude control"> spacecraft attitude control</a> </p> <a href="https://publications.waset.org/abstracts/86635/modeling-of-the-attitude-control-reaction-wheels-of-a-spacecraft-in-software-in-the-loop-test-bed" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/86635.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">266</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">91</span> Fermentable Sugars from Palm Empty Fruit Bunch Biomass for Bioethanol Production</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=U.%20A.%20Asli">U. A. Asli</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20Hamid"> H. Hamid</a>, <a href="https://publications.waset.org/abstracts/search?q=Z.%20A.%20Zakaria"> Z. A. Zakaria</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20N.%20Sadikin"> A. N. Sadikin</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20Rasit"> R. Rasit</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study investigated the effect of a dilute acid, lime and ammonia aqueous pretreatment on the fermentable sugars conversion from empty fruit bunch (EFB) biomass. The dilute acid treatment was carried out in an autoclave, at 121ºC with 4 % of sulphuric acid. In the lime pretreatment, 3 wt % of calcium hydroxide was used, whereas the third method was done by soaking EFB with 28 % ammonia solution. Then the EFB biomass was subjected to a two-stage-acid hydrolysis process. Subsequently, the hydrolysate was fermented by using instant baker’s yeast to produce bioethanol. The highest glucose yield was 890 mg/g of biomass, obtained from the sample which underwent lime pretreatment. The highest bioethanol yield of 6.1mg/g of glucose was achieved from acid pretreatment. This showed that the acid pretreatment gave the most fermentable sugars compared to the other two pretreatments. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=bioethanol" title="bioethanol">bioethanol</a>, <a href="https://publications.waset.org/abstracts/search?q=biomass" title=" biomass"> biomass</a>, <a href="https://publications.waset.org/abstracts/search?q=empty%20fruit%20bunch%20%28EFB%29" title=" empty fruit bunch (EFB)"> empty fruit bunch (EFB)</a>, <a href="https://publications.waset.org/abstracts/search?q=fermentable%20sugars" title=" fermentable sugars"> fermentable sugars</a> </p> <a href="https://publications.waset.org/abstracts/3408/fermentable-sugars-from-palm-empty-fruit-bunch-biomass-for-bioethanol-production" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/3408.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">616</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">90</span> Technical and Environmental Improvement of LNG Carrier's Propulsion Machinery by Using Jatropha Biao Diesel Fuel</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=E.%20H.%20Hegazy">E. H. Hegazy</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20A.%20Mosaad"> M. A. Mosaad</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20A.%20Tawfik"> A. A. Tawfik</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20A.%20Hassan"> A. A. Hassan</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Abbas"> M. Abbas </a> </p> <p class="card-text"><strong>Abstract:</strong></p> The rapid depletion of petroleum reserves and rising oil prices has led to the search for alternative fuels. A promising alternative fuel Jatropha Methyl Easter, JME, has drawn the attention of researchers in recent times as a high potential substrate for production of biodiesel fuel. In this paper, the combustion, performance and emission characteristics of a single cylinder diesel engine when fuelled with JME, diesel oil and natural gas are evaluated experimentally and theoretically. The experimental results showed that the thermal and volumetric efficiency of diesel engine is higher than Jatropha biodiesel engine. The specific fuel consumption, exhaust gas temperature, HC, CO2 and NO were comparatively higher in Jatropha biodiesel, while CO emission is appreciable decreased. CFD investigation was carried out in the present work to compare diesel fuel oil and JME. The CFD simulation offers a powerful and convenient way to help understanding physical and chemical processes involved internal combustion engines for diesel oil fuel and JME fuel. The CFD concluded that the deviation between diesel fuel pressure and JME not exceeds 3 bar and the trend for compression pressure almost the same, also the temperature deviation between diesel fuel and JME not exceeds 40 k and the trend for temperature almost the same. Finally the maximum heat release rate of JME is lower than that of diesel fuel. The experimental and CFD investigation indicated that the Jatropha biodiesel can be used instead of diesel fuel oil with safe engine operation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=dual%20fuel%20diesel%20engine" title="dual fuel diesel engine">dual fuel diesel engine</a>, <a href="https://publications.waset.org/abstracts/search?q=natural%20gas" title=" natural gas"> natural gas</a>, <a href="https://publications.waset.org/abstracts/search?q=Jatropha%20Methyl%20Easter" title=" Jatropha Methyl Easter"> Jatropha Methyl Easter</a>, <a href="https://publications.waset.org/abstracts/search?q=volumetric%20%20efficiency" title=" volumetric efficiency"> volumetric efficiency</a>, <a href="https://publications.waset.org/abstracts/search?q=emissions" title=" emissions"> emissions</a>, <a href="https://publications.waset.org/abstracts/search?q=CFD" title=" CFD"> CFD</a> </p> <a href="https://publications.waset.org/abstracts/20734/technical-and-environmental-improvement-of-lng-carriers-propulsion-machinery-by-using-jatropha-biao-diesel-fuel" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/20734.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">667</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=Zakaria%20S.%20G.%20Hegazy&page=2">2</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=Zakaria%20S.%20G.%20Hegazy&page=3">3</a></li> <li class="page-item"><a class="page-link" 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