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Ait Hocine</title> <meta name="description" content="Search results for: N. Ait Hocine"> <meta name="keywords" content="N. Ait Hocine"> <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="N. 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Ait Hocine"> <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> 32</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: N. Ait Hocine</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">32</span> Protection of the Valves against AC Faults Using the Fast-Acting HVDC Controls</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mesbah%20Tarek">Mesbah Tarek</a>, <a href="https://publications.waset.org/abstracts/search?q=Kelaiaia%20Samia"> Kelaiaia Samia</a>, <a href="https://publications.waset.org/abstracts/search?q=Chiheb%20Sofien"> Chiheb Sofien</a>, <a href="https://publications.waset.org/abstracts/search?q=Kelaiaia%20Mounia%20Samira"> Kelaiaia Mounia Samira</a>, <a href="https://publications.waset.org/abstracts/search?q=Labar%20Hocine"> Labar Hocine</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Short circuit causes important damage in power systems. The aim of this paper is the investigation of the effect of short circuit at the AC side inverter in HVDC transmission line. The cutoff of HVDC transmission line implies important economic losses. In this paper it is proposed an efficient procedure which can protect and eliminate the fault quickly. The theoretical development and simulation are well detailed and illustrated. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=AC%20inverter" title="AC inverter">AC inverter</a>, <a href="https://publications.waset.org/abstracts/search?q=HVDC" title=" HVDC"> HVDC</a>, <a href="https://publications.waset.org/abstracts/search?q=short%20circuit" title=" short circuit"> short circuit</a>, <a href="https://publications.waset.org/abstracts/search?q=switcher%20gate" title=" switcher gate"> switcher gate</a>, <a href="https://publications.waset.org/abstracts/search?q=power%20system" title=" power system"> power system</a> </p> <a href="https://publications.waset.org/abstracts/22000/protection-of-the-valves-against-ac-faults-using-the-fast-acting-hvdc-controls" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/22000.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">561</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">31</span> Numerical Modeling of Storm Swells in Harbor by Boussinesq Equations Model</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mustapha%20Kamel%20Mihoubi">Mustapha Kamel Mihoubi</a>, <a href="https://publications.waset.org/abstracts/search?q=Hocine%20Dahmani"> Hocine Dahmani </a> </p> <p class="card-text"><strong>Abstract:</strong></p> The purpose of work is to study the phenomenon of agitation of storm waves at basin caused by different directions of waves relative to the current provision thrown numerical model based on the equation in shallow water using Boussinesq model MIKE 21 BW. According to the diminishing effect of penetration of a wave optimal solution will be available to be reproduced in reduced model. Another alternative arrangement throws will be proposed to reduce the agitation and the effects of the swell reflection caused by the penetration of waves in the harbor. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=agitation" title="agitation">agitation</a>, <a href="https://publications.waset.org/abstracts/search?q=Boussinesq%20equations" title=" Boussinesq equations"> Boussinesq equations</a>, <a href="https://publications.waset.org/abstracts/search?q=combination" title=" combination"> combination</a>, <a href="https://publications.waset.org/abstracts/search?q=harbor" title=" harbor"> harbor</a> </p> <a href="https://publications.waset.org/abstracts/16182/numerical-modeling-of-storm-swells-in-harbor-by-boussinesq-equations-model" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/16182.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">389</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">30</span> The Response of LCC to DC System Faults and HVDC Re-Establishment</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mesbah%20Tarek">Mesbah Tarek</a>, <a href="https://publications.waset.org/abstracts/search?q=Kelaiaia%20Samia"> Kelaiaia Samia</a>, <a href="https://publications.waset.org/abstracts/search?q=Chiheb%20Sofien"> Chiheb Sofien</a>, <a href="https://publications.waset.org/abstracts/search?q=Kelaiaia%20Mounia%20Samira"> Kelaiaia Mounia Samira</a>, <a href="https://publications.waset.org/abstracts/search?q=Labar%20Hocine"> Labar Hocine</a> </p> <p class="card-text"><strong>Abstract:</strong></p> As every power systems short circuit failure can occur for HVDC at the DC link. So, the power devices should be protected against over heath produced by this over-current. This can be achieved through the power switchers or fast breaker. After short circuit the system is unable to restart, only after a time delay, because of the potential distribution along the DC link line. An appropriate fast and safety control is proposed and tested successfully. The detailed development and discussion of these faults is presented in this paper. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=HVDC" title="HVDC">HVDC</a>, <a href="https://publications.waset.org/abstracts/search?q=DC%20link" title=" DC link"> DC link</a>, <a href="https://publications.waset.org/abstracts/search?q=switchers" title=" switchers"> switchers</a>, <a href="https://publications.waset.org/abstracts/search?q=short%20circuit" title=" short circuit"> short circuit</a>, <a href="https://publications.waset.org/abstracts/search?q=faults" title=" faults"> faults</a> </p> <a href="https://publications.waset.org/abstracts/21998/the-response-of-lcc-to-dc-system-faults-and-hvdc-re-establishment" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/21998.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">574</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">29</span> Reliability-Simulation of Composite Tubular Structure under Pressure by Finite Elements Methods</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Abdelkader%20Hocine">Abdelkader Hocine</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdelhakim%20Maizia"> Abdelhakim Maizia</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The exponential growth of reinforced fibers composite materials use has prompted researchers to step up their work on the prediction of their reliability. Owing to differences between the properties of the materials used for the composite, the manufacturing processes, the load combinations and types of environment, the prediction of the reliability of composite materials has become a primary task. Through failure criteria, TSAI-WU and the maximum stress, the reliability of multilayer tubular structures under pressure is the subject of this paper, where the failure probability of is estimated by the method of Monte Carlo. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=composite" title="composite">composite</a>, <a href="https://publications.waset.org/abstracts/search?q=design" title=" design"> design</a>, <a href="https://publications.waset.org/abstracts/search?q=monte%20carlo" title=" monte carlo"> monte carlo</a>, <a href="https://publications.waset.org/abstracts/search?q=tubular%20structure" title=" tubular structure"> tubular structure</a>, <a href="https://publications.waset.org/abstracts/search?q=reliability" title=" reliability"> reliability</a> </p> <a href="https://publications.waset.org/abstracts/45435/reliability-simulation-of-composite-tubular-structure-under-pressure-by-finite-elements-methods" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/45435.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">464</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">28</span> Chemical Composition of Essential Oil from Lavandula stoechas and Lavandula multifida Growing Wild in Algeria</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Fatima%20Benchikh-Amiraa">Fatima Benchikh-Amiraa</a>, <a href="https://publications.waset.org/abstracts/search?q=Hocine%20Laouerb"> Hocine Laouerb</a>, <a href="https://publications.waset.org/abstracts/search?q=Smain%20Amiraa"> Smain Amiraa</a>, <a href="https://publications.waset.org/abstracts/search?q=Guido%20Flaminic"> Guido Flaminic </a> </p> <p class="card-text"><strong>Abstract:</strong></p> The essential oils of the aerial parts of Lavandula multifida and L. stoechas were extracted at the full bloom stage by hydrodistillation and theirs chemical compositions were estimated by means of gas chromatography鈥搈ass spectrometry (GC鈥揗S). A total of 46 and 67 constituents were identified representing 95.5% and 98.2% of the total oils, respectively. The main components of L. multifida oil were carvacrol (63.8%), beta-bisabolene (8.7%), spathulenol (6.2%), caryophyllene oxide (3.6%) and linalool (2.9%). The oil of L. stoechas was dominated by fenchone (63.9%), camphor (7.8%), 1,8-cineole (5.3%) and myrtenyl acetate (4.2). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=essential%20oils" title="essential oils">essential oils</a>, <a href="https://publications.waset.org/abstracts/search?q=Lavandula%20multifida" title=" Lavandula multifida"> Lavandula multifida</a>, <a href="https://publications.waset.org/abstracts/search?q=Lavandula%20stoechas" title=" Lavandula stoechas"> Lavandula stoechas</a>, <a href="https://publications.waset.org/abstracts/search?q=chemical%20and%20molecular%20engineering" title=" chemical and molecular engineering"> chemical and molecular engineering</a> </p> <a href="https://publications.waset.org/abstracts/14257/chemical-composition-of-essential-oil-from-lavandula-stoechas-and-lavandula-multifida-growing-wild-in-algeria" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/14257.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">429</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">27</span> Chemical Composition and Antioxidant Properties of Daucus Gracilis Extracts</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=El%20Kolli%20Meriem">El Kolli Meriem</a>, <a href="https://publications.waset.org/abstracts/search?q=Laouer%20Hocine"> Laouer Hocine</a>, <a href="https://publications.waset.org/abstracts/search?q=Sahli%20Farida"> Sahli Farida</a>, <a href="https://publications.waset.org/abstracts/search?q=Akkal%20Salah"> Akkal Salah</a>, <a href="https://publications.waset.org/abstracts/search?q=El%20Kolli%20Hayet"> El Kolli Hayet</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The aerial parts of Daucus gracilis (Apiaceae) were subjected to hydrodistillation by a Clevenger apparatus to obtain the essential oil (EO) which has been analyzed by Gas Chromatography (GC) and GC coupled with mass spectrometry. The antioxidant properties of this EO and D. gracilis methanolic extract were studied by both of the free diphenyl-1-picrylhydrazyl (DPPH) radical scavenging and the reducing power techniques. The dominant constituents of the EO were the elemicin (35.3 %) and the geranyl acetate (26.8 %). Both of EO and methanolic extract showed important antioxidant properties with respectively IC50 of 0,002 mg/ml and 0.06 mg/ml. They showed also a reducing power dose-dependent. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=daucus%20gracilis" title="daucus gracilis">daucus gracilis</a>, <a href="https://publications.waset.org/abstracts/search?q=apiaceae" title=" apiaceae"> apiaceae</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=antioxidant%20activity" title=" antioxidant activity"> antioxidant activity</a> </p> <a href="https://publications.waset.org/abstracts/27494/chemical-composition-and-antioxidant-properties-of-daucus-gracilis-extracts" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/27494.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">26</span> Performance of the Strong Stability Method in the Univariate Classical Risk Model</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Safia%20Hocine">Safia Hocine</a>, <a href="https://publications.waset.org/abstracts/search?q=Zina%20Benouaret"> Zina Benouaret</a>, <a href="https://publications.waset.org/abstracts/search?q=Djamil%20A%C2%A8%C4%B1ssani"> Djamil A篓谋ssani</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, we study the performance of the strong stability method of the univariate classical risk model. We interest to the stability bounds established using two approaches. The first based on the strong stability method developed for a general Markov chains. The second approach based on the regenerative processes theory . By adopting an algorithmic procedure, we study the performance of the stability method in the case of exponential distribution claim amounts. After presenting numerically and graphically the stability bounds, an interpretation and comparison of the results have been done. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Marcov%20chain" title="Marcov chain">Marcov chain</a>, <a href="https://publications.waset.org/abstracts/search?q=regenerative%20process" title=" regenerative process"> regenerative process</a>, <a href="https://publications.waset.org/abstracts/search?q=risk%20model" title=" risk model"> risk model</a>, <a href="https://publications.waset.org/abstracts/search?q=ruin%20probability" title=" ruin probability"> ruin probability</a>, <a href="https://publications.waset.org/abstracts/search?q=strong%20stability" title=" strong stability"> strong stability</a> </p> <a href="https://publications.waset.org/abstracts/89002/performance-of-the-strong-stability-method-in-the-univariate-classical-risk-model" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/89002.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">324</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">25</span> Case study of Environmental Impact Assessment of Quarrying Activities</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hocine%20Benabid">Hocine Benabid</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20F.%20Ghorab"> M. F. Ghorab</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The exploration of open pit mines and quarries has always been important resources that provide many valuable needed minerals but very often accompanied by large amounts of dust rejected into the air and also many other negative environmental impacts. The dust remains suspended in the atmosphere before being deposited on soils, on forest trees, on plants and also on water, causing at long term allergic and respiratory diseases for residents living in the vicinity or even far away from the mines and quarries. As a consequence of this activity, dust can also disturb the photosynthetic activity of plants and affect water quality. It is for these reasons and because of the intensification of these activities that our motivations have become larger to deal with this kind of topic, which is becoming nowadays an environmental and health concern for almost every country in the world. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=mines" title="mines">mines</a>, <a href="https://publications.waset.org/abstracts/search?q=dust" title=" dust"> dust</a>, <a href="https://publications.waset.org/abstracts/search?q=environmental%20impacts" title=" environmental impacts"> environmental impacts</a>, <a href="https://publications.waset.org/abstracts/search?q=environmental%20concern" title=" environmental concern "> environmental concern </a> </p> <a href="https://publications.waset.org/abstracts/24353/case-study-of-environmental-impact-assessment-of-quarrying-activities" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/24353.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">383</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">24</span> Potential Distribution and Electric Field Analysis around a Polluted Outdoor Polymeric Insulator with Broken Sheds</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Adel%20Kara">Adel Kara</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdelhafid%20Bayadi"> Abdelhafid Bayadi</a>, <a href="https://publications.waset.org/abstracts/search?q=Hocine%20Terrab"> Hocine Terrab </a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper presents a study of electric field distribution along of 72 kV polymeric outdoor insulators with broken sheds. Different cases of damaged insulators are modeled and both of clean and polluted cases. By 3D finite element analysis using the software package COMSOL Multiphysics 4.3b. The obtained results of potential and the electrical field distribution around insulators by 3D simulation proved that finite element computations is useful tool for studying insulation electrical field distribution. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=electric%20field%20distributions" title="electric field distributions">electric field distributions</a>, <a href="https://publications.waset.org/abstracts/search?q=insulator" title=" insulator"> insulator</a>, <a href="https://publications.waset.org/abstracts/search?q=broken%20sheds" title=" broken sheds"> broken sheds</a>, <a href="https://publications.waset.org/abstracts/search?q=potential%20distributions" title=" potential distributions"> potential distributions</a> </p> <a href="https://publications.waset.org/abstracts/31053/potential-distribution-and-electric-field-analysis-around-a-polluted-outdoor-polymeric-insulator-with-broken-sheds" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/31053.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">512</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">23</span> Essential Oil Analysis of the Aerial Parts of Sideritis incana and Calamitha hispidula </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Smain%20Amiraa">Smain Amiraa</a>, <a href="https://publications.waset.org/abstracts/search?q=Hocine%20Laouerb"> Hocine Laouerb</a>, <a href="https://publications.waset.org/abstracts/search?q=Fatima%20Benchikh-Amiraa"> Fatima Benchikh-Amiraa</a>, <a href="https://publications.waset.org/abstracts/search?q=Guido%20Flaminic"> Guido Flaminic</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The aerial parts of Sideritis incana and Calamintha hispidula at the flowering stage were submitted to hydrodistillation in a Clevenger鈥搕ype apparatus for 3 hours and the chemical composition of the essential oil was analyzed by GC coupled to GC-MS. The essential oil contained a total of 99 constituents for S. incana and 31 for C. hispidula representing 95.7% and 99.6 of the total oils, rerspectively. The mains components of S. incana oil were linalool (25.2), cedrol (13.7%), geraniol (7%) and 伪-terpineol (5.4%). The chemical constituents of the oil from C. hispidula were predominated by pulegone (43.2%), isomenthone (36%), piperitone (3.2%), limonene (2.6%) and 4-terpineol (2.5%). The results revealed that the oil of the plants is characterized by the presence of many important components which could be applied in food, pharmaceutical and perfume industry. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=essential%20oils" title="essential oils">essential oils</a>, <a href="https://publications.waset.org/abstracts/search?q=Calamintha%20hispidula" title=" Calamintha hispidula"> Calamintha hispidula</a>, <a href="https://publications.waset.org/abstracts/search?q=Sideritis%20incana" title=" Sideritis incana"> Sideritis incana</a>, <a href="https://publications.waset.org/abstracts/search?q=chemical%20and%20molecular%20engineering" title=" chemical and molecular engineering"> chemical and molecular engineering</a> </p> <a href="https://publications.waset.org/abstracts/14255/essential-oil-analysis-of-the-aerial-parts-of-sideritis-incana-and-calamitha-hispidula" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/14255.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">246</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">22</span> Hexagonal Honeycomb Sandwich Plate Optimization Using Gravitational Search Algorithm</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20Boudjemai">A. Boudjemai</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Zafrane"> A. Zafrane</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20Hocine"> R. Hocine</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Honeycomb sandwich panels are increasingly used in the construction of space vehicles because of their outstanding strength, stiffness and light weight properties. However, the use of honeycomb sandwich plates comes with difficulties in the design process as a result of the large number of design variables involved, including composite material design, shape and geometry. Hence, this work deals with the presentation of an optimal design of hexagonal honeycomb sandwich structures subjected to space environment. The optimization process is performed using a set of algorithms including the gravitational search algorithm (GSA). Numerical results are obtained and presented for a set of algorithms. The results obtained by the GSA algorithm are much better compared to other algorithms used in this study. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=optimization" title="optimization">optimization</a>, <a href="https://publications.waset.org/abstracts/search?q=gravitational%20search%20algorithm" title=" gravitational search algorithm"> gravitational search algorithm</a>, <a href="https://publications.waset.org/abstracts/search?q=genetic%20algorithm" title=" genetic algorithm"> genetic algorithm</a>, <a href="https://publications.waset.org/abstracts/search?q=honeycomb%20plate" title=" honeycomb plate"> honeycomb plate</a> </p> <a href="https://publications.waset.org/abstracts/10421/hexagonal-honeycomb-sandwich-plate-optimization-using-gravitational-search-algorithm" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/10421.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">377</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">21</span> Improvement Perturb and Observe for a Fast Response MPPT Applied to Photovoltaic Panel</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Labar%20Hocine">Labar Hocine</a>, <a href="https://publications.waset.org/abstracts/search?q=Kelaiaia%20Mounia%20Samira"> Kelaiaia Mounia Samira</a>, <a href="https://publications.waset.org/abstracts/search?q=Mesbah%20Tarek"> Mesbah Tarek</a>, <a href="https://publications.waset.org/abstracts/search?q=Kelaiaia%20Samia"> Kelaiaia Samia</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Maximum power point tracking (MPPT) techniques are used in photovoltaic (PV) systems to maximize the PV array output power by tracking continuously the maximum power point(MPP) which depends on panels temperature and on irradiance conditions. The main drawback of P&O is that, the operating point oscillates around the MPP giving rise to the waste of some amount of available energy; moreover, it is well known that the P&O algorithm can be confused during those time intervals characterized by rapidly changing atmospheric conditions. In this paper, it is shown that in order to limit the negative effects associated to the above drawbacks, the P&O MPPT parameters must be customized to the dynamic behavior of the specific converter adopted. A theoretical analysis allowing the optimal choice of such initial set parameters is also carried out. The fast convergence of the proposal is proven. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=P%26O" title="P&O">P&O</a>, <a href="https://publications.waset.org/abstracts/search?q=Taylor%E2%80%99s%20series" title=" Taylor鈥檚 series"> Taylor鈥檚 series</a>, <a href="https://publications.waset.org/abstracts/search?q=MPPT" title=" MPPT"> MPPT</a>, <a href="https://publications.waset.org/abstracts/search?q=photovoltaic%20panel" title=" photovoltaic panel "> photovoltaic panel </a> </p> <a href="https://publications.waset.org/abstracts/21985/improvement-perturb-and-observe-for-a-fast-response-mppt-applied-to-photovoltaic-panel" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/21985.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">587</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">20</span> Comparative Analysis of Spectral Estimation Methods for Brain-Computer Interfaces</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Rafik%20Djemili">Rafik Djemili</a>, <a href="https://publications.waset.org/abstracts/search?q=Hocine%20Bourouba"> Hocine Bourouba</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20C.%20Amara%20Korba"> M. C. Amara Korba</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, we present a method in order to classify EEG signals for Brain-Computer Interfaces (BCI). EEG signals are first processed by means of spectral estimation methods to derive reliable features before classification step. Spectral estimation methods used are standard periodogram and the periodogram calculated by the Welch method; both methods are compared with Logarithm of Band Power (logBP) features. In the method proposed, we apply Linear Discriminant Analysis (LDA) followed by Support Vector Machine (SVM). Classification accuracy reached could be as high as 85%, which proves the effectiveness of classification of EEG signals based BCI using spectral methods. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=brain-computer%20interface" title="brain-computer interface">brain-computer interface</a>, <a href="https://publications.waset.org/abstracts/search?q=motor%20imagery" title=" motor imagery"> motor imagery</a>, <a href="https://publications.waset.org/abstracts/search?q=electroencephalogram" title=" electroencephalogram"> electroencephalogram</a>, <a href="https://publications.waset.org/abstracts/search?q=linear%20discriminant%20analysis" title=" linear discriminant analysis"> linear discriminant analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=support%20vector%20machine" title=" support vector machine"> support vector machine</a> </p> <a href="https://publications.waset.org/abstracts/6971/comparative-analysis-of-spectral-estimation-methods-for-brain-computer-interfaces" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/6971.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">499</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">19</span> Characterization of Leakage Current on the Surface of Porcelain Insulator under Contaminated Conditions</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hocine%20Terrab">Hocine Terrab </a>, <a href="https://publications.waset.org/abstracts/search?q=Abdelhafid%20Bayadi"> Abdelhafid Bayadi</a>, <a href="https://publications.waset.org/abstracts/search?q=Adel%20Kara"> Adel Kara</a>, <a href="https://publications.waset.org/abstracts/search?q=Ayman%20El-Hag"> Ayman El-Hag</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Insulator flashover under polluted conditions has been a serious threat on the reliability of power systems. It is known that the flashover process is mainly affected by the environmental conditions such as; the pollution level and humidity. Those are the essential parameters influencing the wetting process. This paper presents an investigation of the characteristics of leakage current (LC) developed on the surface of porcelain insulator at contaminated conditions under AC voltage. The study is done in an artificial fog chamber and the LC is characterized for different stages; dry, wetted and presence of discharge activities. Time-frequency and spectral analysis are adopted to calculate the evolution of LC characteristics with various stages prior to flashover occurrence. The preliminary results could be used in analysing the LC to develop more effective diagnosis of early signs of dry band arcing as an indication for insulation washing. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=flashover" title="flashover">flashover</a>, <a href="https://publications.waset.org/abstracts/search?q=harmonic%20components" title=" harmonic components"> harmonic components</a>, <a href="https://publications.waset.org/abstracts/search?q=leakage%20current" title=" leakage current"> leakage current</a>, <a href="https://publications.waset.org/abstracts/search?q=phase%20angle" title=" phase angle"> phase angle</a>, <a href="https://publications.waset.org/abstracts/search?q=statistical%20analysis" title=" statistical analysis"> statistical analysis</a> </p> <a href="https://publications.waset.org/abstracts/31047/characterization-of-leakage-current-on-the-surface-of-porcelain-insulator-under-contaminated-conditions" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/31047.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">432</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">18</span> A Meso Macro Model Prediction of Laminated Composite Damage Elastic Behaviour</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20Hocine">A. Hocine</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Ghouaoula"> A. Ghouaoula</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20M.%20Medjdoub"> S. M. Medjdoub</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Cherifi"> M. Cherifi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The present paper proposed a meso鈥搈acro model describing the mechanical behaviour composite laminates of staking sequence [+胃/-胃]s under tensil loading. The behaviour of a layer is ex-pressed through elasticity coupled to damage. The elastic strain is due to the elasticity of the layer and can be modeled by using the classical laminate theory, and the laminate is considered as an orthotropic material. This means that no coupling effect between strain and curvature is considered. In the present work, the damage is associated to cracking of the matrix and parallel to the fibers and it being taken into account by the changes in the stiffness of the layers. The anisotropic damage is completely described by a single scalar variable and its evolution law is specified from the principle of maximum dissipation. The stress/strain relationship is investigated in plane stress loading. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=damage" title="damage">damage</a>, <a href="https://publications.waset.org/abstracts/search?q=behavior%20modeling" title=" behavior modeling"> behavior modeling</a>, <a href="https://publications.waset.org/abstracts/search?q=meso-macro%20model" title=" meso-macro model"> meso-macro model</a>, <a href="https://publications.waset.org/abstracts/search?q=composite%20laminate" title=" composite laminate"> composite laminate</a>, <a href="https://publications.waset.org/abstracts/search?q=membrane%20loading" title=" membrane loading"> membrane loading</a> </p> <a href="https://publications.waset.org/abstracts/15570/a-meso-macro-model-prediction-of-laminated-composite-damage-elastic-behaviour" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/15570.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">476</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">17</span> Optimal MPPT Charging Battery System for Photovoltaic Standalone Applications</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Kelaiaia%20Mounia%20Samira">Kelaiaia Mounia Samira</a>, <a href="https://publications.waset.org/abstracts/search?q=Labar%20Hocine"> Labar Hocine</a>, <a href="https://publications.waset.org/abstracts/search?q=Mesbah%20Tarek"> Mesbah Tarek</a>, <a href="https://publications.waset.org/abstracts/search?q=Kelaiaia%20samia"> Kelaiaia samia</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The photovoltaic panel produces green power, and because of its availability across the globe, it can supply isolated loads (site away of the electrical network or difficult of access). Unfortunately this energy remains very expensive. The most application of these types of power needs storage devices, the Lithium batteries are commonly used because of its powerful storage capability. Using a solar panel or an array of panels without a controller that can perform MPPT will often result in wasted power, which results in the need to install more panels for the same power requirement. For devices that have the battery connected directly to the panel, this will also result in premature battery failure or capacity loss. In this paper it is proposed a modified P&O algorithm for the MPPT which takes in account the battery鈥檚 internal resistance vs temperature and stage of charging. Of course the temperature variation and irradiation of the PV panel are also introduced. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=modeling" title="modeling">modeling</a>, <a href="https://publications.waset.org/abstracts/search?q=battery" title=" battery"> battery</a>, <a href="https://publications.waset.org/abstracts/search?q=MPPT" title=" MPPT"> MPPT</a>, <a href="https://publications.waset.org/abstracts/search?q=charging" title=" charging"> charging</a>, <a href="https://publications.waset.org/abstracts/search?q=PV%20Panel" title=" PV Panel "> PV Panel </a> </p> <a href="https://publications.waset.org/abstracts/21983/optimal-mppt-charging-battery-system-for-photovoltaic-standalone-applications" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/21983.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">16</span> Calculus of Turbojet Performances for Ideal Case</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20Bennoud">S. Bennoud</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Hocine"> S. Hocine</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20Slme"> H. Slme</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Developments in turbine cooling technology play an important role in increasing the thermal efficiency and the power output of recent gas turbines, in particular the turbojets. Advanced turbojets operate at high temperatures to improve thermal efficiency and power output. These temperatures are far above the permissible metal temperatures. Therefore, there is a critical need to cool the blades in order to give theirs a maximum life period for safe operation. The focused objective of this work is to calculate the turbojet performances, as well as the calculation of turbine blades cooling. The developed application able the calculation of turbojet performances to different altitudes in order to find a point of optimal use making possible to maintain the turbine blades at an acceptable maximum temperature and to limit the local variations in temperatures in order to guarantee their integrity during all the lifespan of the engine. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=brayton%20cycle" title="brayton cycle">brayton cycle</a>, <a href="https://publications.waset.org/abstracts/search?q=turbine%20blades%20cooling" title=" turbine blades cooling"> turbine blades cooling</a>, <a href="https://publications.waset.org/abstracts/search?q=turbojet%20cycle" title=" turbojet cycle"> turbojet cycle</a>, <a href="https://publications.waset.org/abstracts/search?q=turbojet%20performances" title=" turbojet performances"> turbojet performances</a> </p> <a href="https://publications.waset.org/abstracts/4365/calculus-of-turbojet-performances-for-ideal-case" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/4365.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">220</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">15</span> Numerical Modeling of Waves and Currents by Using a Hydro-Sedimentary Model</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mustapha%20Kamel%20Mihoubi">Mustapha Kamel Mihoubi</a>, <a href="https://publications.waset.org/abstracts/search?q=Hocine%20Dahmani"> Hocine Dahmani </a> </p> <p class="card-text"><strong>Abstract:</strong></p> Over recent years much progress has been achieved in the fields of numerical modeling shoreline processes: waves, currents, waves and current. However, there are still some problems in the existing models to link the on the first, the hydrodynamics of waves and currents and secondly, the sediment transport processes and due to the variability in time, space and interaction and the simultaneous action of wave-current near the shore. This paper is the establishment of a numerical modeling to forecast the sediment transport from development scenarios of harbor structure. It is established on the basis of a numerical simulation of a water-sediment model via a 2D model using a set of codes calculation MIKE 21-DHI software. This is to examine the effect of the sediment transport drivers following the dominant incident wave in the direction to pass input harbor work under different variants planning studies to find the technical and economic limitations to the sediment transport and protection of the harbor structure optimum solution. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=swell" title="swell">swell</a>, <a href="https://publications.waset.org/abstracts/search?q=current" title=" current"> current</a>, <a href="https://publications.waset.org/abstracts/search?q=radiation" title=" radiation"> radiation</a>, <a href="https://publications.waset.org/abstracts/search?q=stress" title=" stress"> stress</a>, <a href="https://publications.waset.org/abstracts/search?q=mesh" title=" mesh"> mesh</a>, <a href="https://publications.waset.org/abstracts/search?q=mike21" title=" mike21"> mike21</a>, <a href="https://publications.waset.org/abstracts/search?q=sediment" title=" sediment"> sediment</a> </p> <a href="https://publications.waset.org/abstracts/16069/numerical-modeling-of-waves-and-currents-by-using-a-hydro-sedimentary-model" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/16069.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">469</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">14</span> Cadmium Removal from Aqueous Solution Using Chitosan Beads Prepared from Shrimp Shell Extracted Chitosan</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Bendjaballah%20Malek%3B%20Makhlouf%20Mohammed%20Rabeh%3B%20Boukerche%20Imane%3B%20Benhamza%20Mohammed%20El%20Hocine">Bendjaballah Malek; Makhlouf Mohammed Rabeh; Boukerche Imane; Benhamza Mohammed El Hocine</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, chitosan was derived from Parapenaeus longirostris shrimp shells sourced from a local market in Annaba, eastern Algeria. The extraction process entailed four chemical stages: demineralization, deproteinization, decolorization, and deacetylation. The degree of deacetylation was calculated to be 80.86 %. The extracted chitosan was physically altered to synthesize chitosan beads and characterized via FTIR and XRD analysis. These beads were employed to eliminate cadmium ions from synthetic water. The batch adsorption process was optimized by analyzing the impact of contact time, pH, adsorbent dose, and temperature. The adsorption capacity of and Cd+2 on chitosan beads was found to be 6.83 mg/g and 7.94 mg/g, respectively. The kinetic adsorption of Cd+2 conformed to the pseudo-first-order model, while the isotherm study indicated that the Langmuir Isotherm model well described the adsorption of cadmium . A thermodynamic analysis demonstrated that the adsorption of Cd+2 on chitosan beads is spontaneous and exothermic. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Cd" title="Cd">Cd</a>, <a href="https://publications.waset.org/abstracts/search?q=chitosan" title=" chitosan"> chitosan</a>, <a href="https://publications.waset.org/abstracts/search?q=chitosanbeds" title=" chitosanbeds"> chitosanbeds</a>, <a href="https://publications.waset.org/abstracts/search?q=bioadsorbent" title=" bioadsorbent"> bioadsorbent</a> </p> <a href="https://publications.waset.org/abstracts/167473/cadmium-removal-from-aqueous-solution-using-chitosan-beads-prepared-from-shrimp-shell-extracted-chitosan" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/167473.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">101</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">13</span> Quality of the Ruin Probabilities Approximation Using the Regenerative Processes Approach regarding to Large Claims</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Safia%20Hocine">Safia Hocine</a>, <a href="https://publications.waset.org/abstracts/search?q=Djamil%20A%C3%AFssani"> Djamil A茂ssani</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Risk models, recently studied in the literature, are becoming increasingly complex. It is rare to find explicit analytical relations to calculate the ruin probability. Indeed, the stability issue occurs naturally in ruin theory, when parameters in risk cannot be estimated than with uncertainty. However, in most cases, there are no explicit formulas for the ruin probability. Hence, the interest to obtain explicit stability bounds for these probabilities in different risk models. In this paper, we interest to the stability bounds of the univariate classical risk model established using the regenerative processes approach. By adopting an algorithmic approach, we implement this approximation and determine numerically the bounds of ruin probability in the case of large claims (heavy-tailed distribution). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=heavy-tailed%20distribution" title="heavy-tailed distribution">heavy-tailed distribution</a>, <a href="https://publications.waset.org/abstracts/search?q=large%20claims" title=" large claims"> large claims</a>, <a href="https://publications.waset.org/abstracts/search?q=regenerative%20process" title=" regenerative process"> regenerative process</a>, <a href="https://publications.waset.org/abstracts/search?q=risk%20model" title=" risk model"> risk model</a>, <a href="https://publications.waset.org/abstracts/search?q=ruin%20probability" title=" ruin probability"> ruin probability</a>, <a href="https://publications.waset.org/abstracts/search?q=stability" title=" stability"> stability</a> </p> <a href="https://publications.waset.org/abstracts/63426/quality-of-the-ruin-probabilities-approximation-using-the-regenerative-processes-approach-regarding-to-large-claims" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/63426.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">363</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">12</span> Physicochemical and Optical Characterization of Rutile TiO2 Thin Films Grown by APCVD Technique</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Dalila%20Hocine">Dalila Hocine</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammed%20Said%20Belkaid"> Mohammed Said Belkaid</a>, <a href="https://publications.waset.org/abstracts/search?q=Abderahmane%20Moussi"> Abderahmane Moussi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, pure rutile TiO2 thin films were directly synthesized on silicon substrates by Atmospheric Pressure Chemical Vapor Deposition technique (APCVD) using TiCl4 as precursor. We studied the physicochemical properties and the optical properties of the produced coatings by means of standard characterization techniques of Fourier Transform Infrared Spectroscopy (FTIR) combined with UV-Vis Reflectance Spectrophotometry. The absorption peaks at 423 cm-1 and 610 cm-1 were observed for the rutile TiO2 thin films, by FTIR measurements. The absorption peak at 739 cm-1 due to the vibration of the Ti-O bonds, was also detected. UV-Vis Reflectance Spectrophotometry is employed for measuring the optical band gap from the measurements of the TiO2 films reflectance. The optical band gap was then extracted from the reflectance data for the TiO2 sample. It was estimated to be 3.05 eV which agrees with the band gap of commercial rutile TiO2 sample. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=titanium%20dioxide" title="titanium dioxide">titanium dioxide</a>, <a href="https://publications.waset.org/abstracts/search?q=physicochemical%20properties" title=" physicochemical properties"> physicochemical properties</a>, <a href="https://publications.waset.org/abstracts/search?q=APCVD" title=" APCVD"> APCVD</a>, <a href="https://publications.waset.org/abstracts/search?q=FTIR" title=" FTIR"> FTIR</a>, <a href="https://publications.waset.org/abstracts/search?q=band%20gap" title=" band gap"> band gap</a> </p> <a href="https://publications.waset.org/abstracts/27069/physicochemical-and-optical-characterization-of-rutile-tio2-thin-films-grown-by-apcvd-technique" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/27069.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">396</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">11</span> Nonlinear Analysis of a Building Surmounted by a RC Water Tank under Hydrodynamic Load</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hocine%20Hammoum">Hocine Hammoum</a>, <a href="https://publications.waset.org/abstracts/search?q=Karima%20Bouzelha"> Karima Bouzelha</a>, <a href="https://publications.waset.org/abstracts/search?q=Lounis%20Ziani"> Lounis Ziani</a>, <a href="https://publications.waset.org/abstracts/search?q=Lounis%20Hamitouche"> Lounis Hamitouche</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, we study a complex structure which is an apartment building surmounted by a reinforced concrete water tank. The tank located on the top floor of the building is a container with capacity of 1000 m<sup>3</sup>. The building is complex in its design, its calculation and by its behavior under earthquake effect. This structure located in Algiers and aged of 53 years has been subjected to several earthquakes, but the earthquake of May 21<sup>st</sup>, 2003 with a magnitude of 6.7 on the Richter scale that struck Boumerdes region at 40 Kms East of Algiers was fatal for it. It was downgraded after an investigation study because the central core sustained serious damage. In this paper, to estimate the degree of its damages, the seismic performance of the structure will be evaluated taking into account the hydrodynamic effect, using a static equivalent nonlinear analysis called pushover. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=performance%20analysis" title="performance analysis">performance analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=building" title=" building"> building</a>, <a href="https://publications.waset.org/abstracts/search?q=reinforced%20concrete%20tank" title=" reinforced concrete tank"> reinforced concrete tank</a>, <a href="https://publications.waset.org/abstracts/search?q=seismic%20analysis" title=" seismic analysis"> seismic analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=nonlinear%20analysis" title=" nonlinear analysis"> nonlinear analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrodynamic" title=" hydrodynamic"> hydrodynamic</a>, <a href="https://publications.waset.org/abstracts/search?q=pushover" title=" pushover"> pushover</a> </p> <a href="https://publications.waset.org/abstracts/45967/nonlinear-analysis-of-a-building-surmounted-by-a-rc-water-tank-under-hydrodynamic-load" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/45967.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">421</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">10</span> Mecano-Reliability Approach Applied to a Water Storage Tank Placed on Ground</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Amar%20Aliche">Amar Aliche</a>, <a href="https://publications.waset.org/abstracts/search?q=Hocine%20Hammoum"> Hocine Hammoum</a>, <a href="https://publications.waset.org/abstracts/search?q=Karima%20Bouzelha"> Karima Bouzelha</a>, <a href="https://publications.waset.org/abstracts/search?q=Arezki%20Ben%20Abderrahmane"> Arezki Ben Abderrahmane</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Traditionally, the dimensioning of storage tanks is conducted with a deterministic approach based on partial coefficients of safety. These coefficients are applied to take into account the uncertainties related to hazards on properties of materials used and applied loads. However, the use of these safety factors in the design process does not assure an optimal and reliable solution and can sometimes lead to a lack of robustness of the structure. The reliability theory based on a probabilistic formulation of constructions safety can respond in an adapted manner. It allows constructing a modelling in which uncertain data are represented by random variables, and therefore allows a better appreciation of safety margins with confidence indicators. The work presented in this paper consists of a mecano-reliability analysis of a concrete storage tank placed on ground. The classical method of Monte Carlo simulation is used to evaluate the failure probability of concrete tank by considering the seismic acceleration as random variable. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=reliability%20approach" title="reliability approach">reliability approach</a>, <a href="https://publications.waset.org/abstracts/search?q=storage%20tanks" title=" storage tanks"> storage tanks</a>, <a href="https://publications.waset.org/abstracts/search?q=monte%20carlo%20simulation" title=" monte carlo simulation"> monte carlo simulation</a>, <a href="https://publications.waset.org/abstracts/search?q=seismic%20acceleration" title=" seismic acceleration"> seismic acceleration</a> </p> <a href="https://publications.waset.org/abstracts/46607/mecano-reliability-approach-applied-to-a-water-storage-tank-placed-on-ground" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/46607.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">307</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">9</span> The Impact of Karst Structures on the Urban Environment in Semi-Arid Area</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Benhammadi%20Hocine">Benhammadi Hocine</a>, <a href="https://publications.waset.org/abstracts/search?q=Chaffai%20Hicham"> Chaffai Hicham</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Urban development is often dependent on adequate land for expansion, except that sometimes these areas have vulnerability. This is the case of karst regions characterized by carbonate geological formations marked by the presence of cavities and cracks. The impact of climate variability in Cheria area marked by a growing shortage of rainfall, the impact resulted in the development of the vulnerability of these structures. This vulnerability has led to the appearance of collapse phenomena as well in both agricultural and urban areas. Two phenomena have emerged to explain the collapses, the first is assigned a filling process in the cavities, and the second is due to a weakening of the resistance that collapses limestone slab shear phenomenon. In urban areas, the weight of the buildings has increased the load on the limestone slab and accelerated the collapse. The analysis of the environmental process is in the context of our modest work, after which we indicate the appropriate methods for management policy of urban expansion. This management more preventive (upstream), much less expensive than remedial solutions (downstream) needed after the event and sometimes ineffective. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Cheria" title="Cheria">Cheria</a>, <a href="https://publications.waset.org/abstracts/search?q=urban" title=" urban"> urban</a>, <a href="https://publications.waset.org/abstracts/search?q=climate%20variability" title=" climate variability"> climate variability</a>, <a href="https://publications.waset.org/abstracts/search?q=vulnerability%20karst%20collapse" title=" vulnerability karst collapse"> vulnerability karst collapse</a>, <a href="https://publications.waset.org/abstracts/search?q=extension" title=" extension"> extension</a>, <a href="https://publications.waset.org/abstracts/search?q=management" title=" management"> management</a> </p> <a href="https://publications.waset.org/abstracts/23603/the-impact-of-karst-structures-on-the-urban-environment-in-semi-arid-area" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/23603.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">468</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">8</span> The Mechanism of Antimicrobial Activity and Antioxidant Effects of the Essential Oil and the Methanolic Extract of Carum montanum (Coss. et Dur.) Benth. Et Hook. Aerial Parts from Algeria</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Meriem%20El%20Kolli">Meriem El Kolli</a>, <a href="https://publications.waset.org/abstracts/search?q=Hocine%20Laouer"> Hocine Laouer</a>, <a href="https://publications.waset.org/abstracts/search?q=Hayet%20El%20Kolli"> Hayet El Kolli</a>, <a href="https://publications.waset.org/abstracts/search?q=Salah%20Akkal"> Salah Akkal</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The methanolic extract (ME) of C. montanum obtained by a hydo-alcoholic maceration and its polyphenol content was evaluated by Folin-Ciocalteu method. This extract and C. montanum essential oil were screened for antimicrobial activity against 21 microbial strains by agar diffusion method. MICs of the EO were determined by the broth micro dilution method. The mechanism of action of the EO was determined on the susceptible strains by the time kill assay and the lysis experience. Antioxidant properties were studied by both free DPPH radical scavenging and reducing power techniques. The TPC in the ME showed a high level of 101.50 卤 5.33 mg GAE /mg. B. cereus was the most sensitive strain with MIC of 55.5 碌g/ml , then K. pneumoniae (111 碌g/ml). A remarkable decrease in a survival rate as well as in the absorbance at 260 nm were recorded, which suggest that the cytoplasm membrane is one of the targets of the EO. Antioxidant effects were concentration dependent and IC50 values were 1.09 卤 0.37 碌g/ml for the EO and 65.04 卤 0.00 碌g/ml for the ME by DPPH method and a reducing power dose-dependent. In conclusion, C. montanum extracts showed potent which could be exploited in the food industry for food preservation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=C.%20montanum" title="C. montanum">C. montanum</a>, <a href="https://publications.waset.org/abstracts/search?q=Apiaceae" title=" Apiaceae"> Apiaceae</a>, <a href="https://publications.waset.org/abstracts/search?q=essential%20oils" title=" essential oils"> essential oils</a>, <a href="https://publications.waset.org/abstracts/search?q=antimicrobial%20activity" title=" antimicrobial activity"> antimicrobial activity</a>, <a href="https://publications.waset.org/abstracts/search?q=antioxidant%20activity" title=" antioxidant activity"> antioxidant activity</a>, <a href="https://publications.waset.org/abstracts/search?q=reducing%20power" title=" reducing power"> reducing power</a> </p> <a href="https://publications.waset.org/abstracts/41814/the-mechanism-of-antimicrobial-activity-and-antioxidant-effects-of-the-essential-oil-and-the-methanolic-extract-of-carum-montanum-coss-et-dur-benth-et-hook-aerial-parts-from-algeria" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/41814.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">236</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">7</span> Chemical Composition and Antibacterial Activity of the Essential Oils from Bunium alpinum and Bunium incrassatum</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hayet%20El%20Kolli">Hayet El Kolli</a>, <a href="https://publications.waset.org/abstracts/search?q=Hocine%20Laouer"> Hocine Laouer</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Bunium in the world comprises about 50 to 100 species, mostly distributed in: Algeria, Italy, Pakistan, Iran, and South Africa. Bunium species have several uses like: Bunium persicum which is commonly used as antispasmodic, carminative, anti-obesity and lactogage. This plant have been widely used as an additive in food stuff such as in bread cooking, rice and yoghurt for its carminative, anti-dyspepsia and antispasmodic effect. The B. paucifolium oil has a wide spectrum of action against moulds, yeast and bacteria. The chemical compositions of Bunium incrassatum and Bunium alpinum essential oils were carry out by GC and GC/MS. Therefore, antibacterial activity of two oils was investigated by disk diffusion method against Pseudomonas aeruginosa ATCC 27853, Escherichia coli ATCC 25922, Salmonella typhimurium ATCC 1331, Staphylococcus aureus ATCC 25923, Klebsiella pneumoniae ATCC 700603, Bacillus cereus ATCC 10876, Enterococcus faecalis ATCC 49452, Lysteria monocytogenes ATCC 15313, Citrobacter freundii ATCC 8090, Proteus mirabilis ATCC 35659. A moderate antibacterial activity was found. In conclusion, it is found that essential oils of the two species are rich in sesquiterpens and other oxygenated compounds. These compounds have been reported to show bactericidal activity and the presence of phenolic compounds makes them useful antioxidants so that results confirm some ethnopharmacologique applications of these two oils of Bunium. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Bunium%20alpinum" title="Bunium alpinum">Bunium alpinum</a>, <a href="https://publications.waset.org/abstracts/search?q=Bunium%20incrassatum" title=" Bunium incrassatum"> Bunium incrassatum</a>, <a href="https://publications.waset.org/abstracts/search?q=apiaceae" title=" apiaceae"> apiaceae</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=sesquiterpens" title=" sesquiterpens"> sesquiterpens</a>, <a href="https://publications.waset.org/abstracts/search?q=phenols" title=" phenols"> phenols</a>, <a href="https://publications.waset.org/abstracts/search?q=antibacterial" title=" antibacterial"> antibacterial</a>, <a href="https://publications.waset.org/abstracts/search?q=antioxidant%20activities" title=" antioxidant activities"> antioxidant activities</a> </p> <a href="https://publications.waset.org/abstracts/6330/chemical-composition-and-antibacterial-activity-of-the-essential-oils-from-bunium-alpinum-and-bunium-incrassatum" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/6330.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">371</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">6</span> Geophysical Approach in the Geological Characterization of a Dam Site: Case of the Chebabta-Dam, Meskiana, Oum El-Bouaghi</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Benhammadi%20Hocine">Benhammadi Hocine</a>, <a href="https://publications.waset.org/abstracts/search?q=Djamel%20Boubaya"> Djamel Boubaya</a>, <a href="https://publications.waset.org/abstracts/search?q=Chaffai%20Hicham"> Chaffai Hicham</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Meskiana Area is characterized by a semi-arid climate where the water supply for irrigation and industry is not sufficient as the priority goes for domestic use. To meet the increasing population growth and development, the authorities have considered building a new water retaining structure on some major temporary water streams. For this purpose Chebabta site on Oued Meskiana was chosen as the future dam site. It is large enough to store the desired volume of water. This study comes to investigate the conditions of the site and the adequacy of the ground as a foundation for the projected dam. The conditions of the site include the geological structure and mainly the presence of discontinuities in the formation on which the dam will be built, the nature of the lithologies under the foundation and the future lake, and the presence of any hazard. This site characterization is usually carried out using different methods in order to highlight any underground buried problematic structure. In this context, the different geophysical technics remain the most used ones. Three geophysical methods were used in the case of the Chebabta dam site, namely, electric survey, seismic refraction, and tomography. The choice of the technics and the location of the scan line was made on the basis of the available geological data. In this sense, profiles have been established on both banks of Oued Meskiana. The obtained results have allowed a better characterization of the geological structure, defining the limit between the surface cover and the bedrock, which is, in other words, the limit between the weathered zone and the bedrock. Their respective thicknesses were also determined by seismic refraction and electrical resistivity sounding. However, the tomography imaging technic has succeeded in positioning a fault structure passing through the right bank of the wadi. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=dam%20site" title="dam site">dam site</a>, <a href="https://publications.waset.org/abstracts/search?q=fault" title=" fault"> fault</a>, <a href="https://publications.waset.org/abstracts/search?q=geophysic" title=" geophysic"> geophysic</a>, <a href="https://publications.waset.org/abstracts/search?q=investigation" title=" investigation"> investigation</a>, <a href="https://publications.waset.org/abstracts/search?q=Meskiana" title=" Meskiana"> Meskiana</a> </p> <a href="https://publications.waset.org/abstracts/160184/geophysical-approach-in-the-geological-characterization-of-a-dam-site-case-of-the-chebabta-dam-meskiana-oum-el-bouaghi" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/160184.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">88</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">5</span> A Three-Dimensional TLM Simulation Method for Thermal Effect in PV-Solar Cells </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=R.%20Hocine">R. Hocine</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Boudjemai"> A. Boudjemai</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Amrani"> A. Amrani</a>, <a href="https://publications.waset.org/abstracts/search?q=K.%20Belkacemi"> K. Belkacemi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Temperature rising is a negative factor in almost all systems. It could cause by self heating or ambient temperature. In solar photovoltaic cells this temperature rising affects on the behavior of cells. The ability of a PV module to withstand the effects of periodic hot-spot heating that occurs when cells are operated under reverse biased conditions is closely related to the properties of the cell semi-conductor material. In addition, the thermal effect also influences the estimation of the maximum power point (MPP) and electrical parameters for the PV modules, such as maximum output power, maximum conversion efficiency, internal efficiency, reliability, and lifetime. The cells junction temperature is a critical parameter that significantly affects the electrical characteristics of PV modules. For practical applications of PV modules, it is very important to accurately estimate the junction temperature of PV modules and analyze the thermal characteristics of the PV modules. Once the temperature variation is taken into account, we can then acquire a more accurate MPP for the PV modules, and the maximum utilization efficiency of the PV modules can also be further achieved. In this paper, the three-Dimensional Transmission Line Matrix (3D-TLM) method was used to map the surface temperature distribution of solar cells while in the reverse bias mode. It was observed that some cells exhibited an inhomogeneity of the surface temperature resulting in localized heating (hot-spot). This hot-spot heating causes irreversible destruction of the solar cell structure. Hot spots can have a deleterious impact on the total solar modules if individual solar cells are heated. So, the results show clearly that the solar cells are capable of self-generating considerable amounts of heat that should be dissipated very quickly to increase PV module's lifetime. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=thermal%20effect" title="thermal effect">thermal effect</a>, <a href="https://publications.waset.org/abstracts/search?q=conduction" title=" conduction"> conduction</a>, <a href="https://publications.waset.org/abstracts/search?q=heat%20dissipation" title=" heat dissipation"> heat dissipation</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal%20conductivity" title=" thermal conductivity"> thermal conductivity</a>, <a href="https://publications.waset.org/abstracts/search?q=solar%20cell" title=" solar cell"> solar cell</a>, <a href="https://publications.waset.org/abstracts/search?q=PV%20module" title=" PV module"> PV module</a>, <a href="https://publications.waset.org/abstracts/search?q=nodes" title=" nodes"> nodes</a>, <a href="https://publications.waset.org/abstracts/search?q=3D-TLM" title=" 3D-TLM"> 3D-TLM</a> </p> <a href="https://publications.waset.org/abstracts/10333/a-three-dimensional-tlm-simulation-method-for-thermal-effect-in-pv-solar-cells" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/10333.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">387</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">4</span> Effect of Phaseolus vulgaris Inoculation on P. vulgaris and Zea mays Growth and Yield Cultivated in Intercropping</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nour%20Elhouda%20Abed">Nour Elhouda Abed</a>, <a href="https://publications.waset.org/abstracts/search?q=Bedj%20Mimi"> Bedj Mimi</a>, <a href="https://publications.waset.org/abstracts/search?q=Wahid%20Slimani"> Wahid Slimani</a>, <a href="https://publications.waset.org/abstracts/search?q=Mourad%20Atif"> Mourad Atif</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdelhakim%20Ouzzane"> Abdelhakim Ouzzane</a>, <a href="https://publications.waset.org/abstracts/search?q=Hocine%20Irekti"> Hocine Irekti</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdelkader%20Bekki"> Abdelkader Bekki</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The most frequent system of cereal production in Algeria is fallow-wheat. This is an extensive system that meets only the half needs some cereals and fodder demand. Resorption of fallow has become a strategic necessity to ensure food security in response to the instability of supply and the persistence of higher food prices on the world market. Despite several attempts to replace the fallow by crop cultures, choosing the best crop remains. Today, the agronomic and economic interests of legumes are demonstrated. However, their crop culture remains marginalized because of the weakness and instability of their performance. In the context of improving legumes and cereals crops as well as fallow resorption, we undertook to test, in the field, the effect of rhizobial inoculation of Phaseolus vulgaris in association with Zea Mays. We firstly studied the genetic diversity of rhizobial strains that nodulate P.vulgaris isolated from fifteen (15) different regions. ARDRA had shown 18 different genetic profiles. Symbiotic characterization highlighted a strain that highly significantly improved the fresh and dry weight of the host plant, in comparison to the negative control (un-inoculated) and the positive control (inoculated with the reference strain CIAT 899). In the field, the selected strain increased significantly the growth and yield of P.vulgaris and Zea Mays comparing to the non-inoculated control. However, the mix inoculation (selected strain+ Ciat 899) had not given the best parameters showing, thus, no synergy between the strains. These results indicate the replacing fallow by a crop legume in intercropping with cereals crops. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fallow" title="fallow">fallow</a>, <a href="https://publications.waset.org/abstracts/search?q=intercropping" title=" intercropping"> intercropping</a>, <a href="https://publications.waset.org/abstracts/search?q=inoculation" title=" inoculation"> inoculation</a>, <a href="https://publications.waset.org/abstracts/search?q=legumes-cereals" title=" legumes-cereals"> legumes-cereals</a> </p> <a href="https://publications.waset.org/abstracts/44441/effect-of-phaseolus-vulgaris-inoculation-on-p-vulgaris-and-zea-mays-growth-and-yield-cultivated-in-intercropping" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/44441.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">366</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">3</span> Influence of UV Aging on the Mechanical Properties of Polycarbonate</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20Redjala">S. Redjala</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20Ait%20Hocine"> N. Ait Hocine</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Gratton"> M. Gratton</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20Poirot"> N. Poirot</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20Ferhoum"> R. Ferhoum</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Azem"> S. Azem</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Polycarbonate (PC) is a promising polymer with high transparency in the range of the visible spectrum and is used in various fields, for example medical, electronic, automotive. Its low weight, chemical inertia, high impact resistance and relatively low cost are of major importance. In recent decades, some materials such as metals and ceramics have been replaced by polymers because of their superior advantages. However, some characteristics of the polymers are highly modified under the effect of ultraviolet (UV) radiation and temperature. The changes induced in the material by such aging depend on the exposure time, the wavelength of the UV radiation and the temperature level. The UV energy is sufficient to break the chemical bonds leading to a cleavage of the molecular chains. This causes changes in the mechanical, thermal, optical and morphological properties of the material. The present work is focused on the study of the effects of aging under ultraviolet (UV) radiation and under different temperature values on the physical-chemical and mechanical properties of a PC. Thus, various investigations, such as FTIR and XRD analyses, SEM and optical microscopy observations, micro-hardness measurements and monotonic and cyclic tensile tests, were carried out on the PC in the initial state and after aging. Results have shown the impact of aging on the properties of the PC studied. In fact, the MEB highlighted changes in the superficial morphology of the material by the presence of cracks and material de-bonding in the form of debris. The FTIR spectra reveal an attenuation of the peaks like the hydroxyl (OH) groups located at 3520 cm-1. The XRD lines shift towards a larger angle, reaching a maximum of 3掳. In addition, Vickers micro-hardness measurements show that aging affects the surface and the core of the material, which results in different mechanical behaviours under monotonic and cyclic tensile tests. This study pointed out effects of aging on the macroscopic properties of the PC studied, in relationship with its microstructural changes. <p class="card-text"><strong>Keywords:</strong> <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=physical-chemical%20properties" title=" physical-chemical properties"> physical-chemical properties</a>, <a href="https://publications.waset.org/abstracts/search?q=polycarbonate" title=" polycarbonate"> polycarbonate</a>, <a href="https://publications.waset.org/abstracts/search?q=UV%20aging" title=" UV aging"> UV aging</a>, <a href="https://publications.waset.org/abstracts/search?q=temperature%20aging" title=" temperature aging"> temperature aging</a> </p> <a href="https://publications.waset.org/abstracts/84164/influence-of-uv-aging-on-the-mechanical-properties-of-polycarbonate" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/84164.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> <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=N.%20Ait%20Hocine&page=2">2</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=N.%20Ait%20Hocine&page=2" rel="next">&rsaquo;</a></li> </ul> </div> </main> <footer> <div id="infolinks" class="pt-3 pb-2"> <div class="container"> <div style="background-color:#f5f5f5;" class="p-3"> <div class="row"> <div class="col-md-2"> <ul class="list-unstyled"> About <li><a 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