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Mitiche</title> <meta name="description" content="Search results for: Lahcene Mitiche"> <meta name="keywords" content="Lahcene Mitiche"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button class="d-block d-lg-none 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action="https://publications.waset.org/abstracts/search"> <div id="custom-search-input"> <div class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="Lahcene Mitiche"> <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> 10</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: Lahcene Mitiche</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">10</span> Hybrid Thresholding Lifting Dual Tree Complex Wavelet Transform with Wiener Filter for Quality Assurance of Medical Image</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hilal%20Naimi">Hilal Naimi</a>, <a href="https://publications.waset.org/abstracts/search?q=Amelbahahouda%20Adamou-Mitiche"> Amelbahahouda Adamou-Mitiche</a>, <a href="https://publications.waset.org/abstracts/search?q=Lahcene%20Mitiche"> Lahcene Mitiche</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The main problem in the area of medical imaging has been image denoising. The most defying for image denoising is to secure data carrying structures like surfaces and edges in order to achieve good visual quality. Different algorithms with different denoising performances have been proposed in previous decades. More recently, models focused on deep learning have shown a great promise to outperform all traditional approaches. However, these techniques are limited to the necessity of large sample size training and high computational costs. This research proposes a denoising approach basing on LDTCWT (Lifting Dual Tree Complex Wavelet Transform) using Hybrid Thresholding with Wiener filter to enhance the quality image. This research describes the LDTCWT as a type of lifting wavelets remodeling that produce complex coefficients by employing a dual tree of lifting wavelets filters to get its real part and imaginary part. Permits the remodel to produce approximate shift invariance, directionally selective filters and reduces the computation time (properties lacking within the classical wavelets transform). To develop this approach, a hybrid thresholding function is modeled by integrating the Wiener filter into the thresholding function. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=lifting%20wavelet%20transform" title="lifting wavelet transform">lifting wavelet transform</a>, <a href="https://publications.waset.org/abstracts/search?q=image%20denoising" title=" image denoising"> image denoising</a>, <a href="https://publications.waset.org/abstracts/search?q=dual%20tree%20complex%20wavelet%20transform" title=" dual tree complex wavelet transform"> dual tree complex wavelet transform</a>, <a href="https://publications.waset.org/abstracts/search?q=wavelet%20shrinkage" title=" wavelet shrinkage"> wavelet shrinkage</a>, <a href="https://publications.waset.org/abstracts/search?q=wiener%20filter" title=" wiener filter"> wiener filter</a> </p> <a href="https://publications.waset.org/abstracts/135374/hybrid-thresholding-lifting-dual-tree-complex-wavelet-transform-with-wiener-filter-for-quality-assurance-of-medical-image" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/135374.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">163</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> Effect of Two Entomopathogenic Fungi Beauveria bassiana and Metarhizium anisopliae var. acridum on the Haemolymph of the Desert Locust Schistocerca gregaria</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Fatima%20Zohra%20Bissaad">Fatima Zohra Bissaad</a>, <a href="https://publications.waset.org/abstracts/search?q=Farid%20Bounaceur"> Farid Bounaceur</a>, <a href="https://publications.waset.org/abstracts/search?q=Nassima%20Behidj"> Nassima Behidj</a>, <a href="https://publications.waset.org/abstracts/search?q=Nadjiba%20Chebouti"> Nadjiba Chebouti</a>, <a href="https://publications.waset.org/abstracts/search?q=Fatma%20Halouane"> Fatma Halouane</a>, <a href="https://publications.waset.org/abstracts/search?q=Bahia%20Doumandji-Mitiche"> Bahia Doumandji-Mitiche</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Effect of <em>Beauveria bassiana</em> and <em>Metarhizium anisopliae</em> var. <em>acridum</em> on the 5<sup>th </sup>instar nymphs of <em>Schistocerca gregaria</em> was studied in the laboratory. Infection by these both entomopathogenic fungi caused reduction in the hemolymph total protein. The average amounts of total proteins were 2.3, 2.07, 2.09 µg/100 ml of haemolymph in the control and <em>M. anisopliae </em>var. <em>acridum</em>, and <em>B. bassiana</em> based-treatments, respectively. Three types of haemocytes were recognized and identified as prohaemocytes, plasmatocytes and granulocytes. The treatment caused significant reduction in the total haemocyte count and in each haemocyte type on the 9<sup>th</sup> day after its application. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Beauveria%20bassiana" title="Beauveria bassiana">Beauveria bassiana</a>, <a href="https://publications.waset.org/abstracts/search?q=haemolymph%20picture" title=" haemolymph picture"> haemolymph picture</a>, <a href="https://publications.waset.org/abstracts/search?q=haemolymph%20protein" title=" haemolymph protein"> haemolymph protein</a>, <a href="https://publications.waset.org/abstracts/search?q=Metarhizium%20anisopliae%20var.%20acridum" title=" Metarhizium anisopliae var. acridum"> Metarhizium anisopliae var. acridum</a>, <a href="https://publications.waset.org/abstracts/search?q=Schistocerca%20gregaria" title=" Schistocerca gregaria"> Schistocerca gregaria</a> </p> <a href="https://publications.waset.org/abstracts/16594/effect-of-two-entomopathogenic-fungi-beauveria-bassiana-and-metarhizium-anisopliae-var-acridum-on-the-haemolymph-of-the-desert-locust-schistocerca-gregaria" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/16594.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">478</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> Toxic Activity of Biopesticide Metarhizium anisopliae var acridium ‘Green Muscle’ on the Cuticle of the Desert Locust Schistocerca gegaria (Forskål, 1775)</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=F.%20Haddadj">F. Haddadj</a>, <a href="https://publications.waset.org/abstracts/search?q=F.%20Acheuk"> F. Acheuk</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Hamdi"> S. Hamdi</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Zenia"> S. Zenia</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Smai"> A. Smai</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20Saadi"> H. Saadi</a>, <a href="https://publications.waset.org/abstracts/search?q=B.%20Doumandji-Mitiche"> B. Doumandji-Mitiche</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Locust is causing significant losses in agricultural production in the countries concerned by the invasion. Up to the present control strategy has consisted only of the spreaders chemicals; they have proven harmful to the environment and taking a conscience prompted researchers and institutions to lean towards the biological control based mostly by using microorganism. It is in that sense is we've made our contribution by the use of a biopesticide which is entomopathogenic fungus Metarhizium anisopliae var acridium ‘Green Muscle’ on part of the cuticle the larval of fifth instar locust Schistocerca gregaria. Preliminary test on the study of the pathogenicity of the bio-control agent, was conducted in the laboratory on L5 S. gregaria, on which we inoculated treatment by direct spraying of the cuticle, 5 days after treatment individuals are sacrificed. Microscopic observation revealed alterations in the architecture of the cuticle which leads to disorganization of cell layers. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=biopesticide" title="biopesticide">biopesticide</a>, <a href="https://publications.waset.org/abstracts/search?q=cuticle" title=" cuticle"> cuticle</a>, <a href="https://publications.waset.org/abstracts/search?q=desert%20locust" title=" desert locust"> desert locust</a>, <a href="https://publications.waset.org/abstracts/search?q=effect" title=" effect"> effect</a> </p> <a href="https://publications.waset.org/abstracts/25894/toxic-activity-of-biopesticide-metarhizium-anisopliae-var-acridium-green-muscle-on-the-cuticle-of-the-desert-locust-schistocerca-gegaria-forskal-1775" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/25894.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">415</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> Modeling of the Flow through an Earth Dam and Geotechnical Slope Analyzes</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20Ferhati">Ahmed Ferhati</a>, <a href="https://publications.waset.org/abstracts/search?q=Arezki%20Adjrad"> Arezki Adjrad</a>, <a href="https://publications.waset.org/abstracts/search?q=Ratiba%20Mitiche-Kettab"> Ratiba Mitiche-Kettab</a>, <a href="https://publications.waset.org/abstracts/search?q=Hakim%20Djafer%20Khodja"> Hakim Djafer Khodja</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The porous media are omnipresent around us that they are natural as sand, clay, rocks, or manufactured like concretes, cement, and ceramics. The variety of porous environment indicates a wide material range which can be very different from each other. Their common point is to be made up of a solid matrix and a porous space. In our case of study, we made the modeling of the flows in porous environments through the massives as in the case of an earth dam. The computer code used (PLAXIS) offer the possibility of modeling of various structures, in particular, the works in lands because that it deals with the pore water pressure due to the underground flow and the calculation of the plastic deformations. To confirm results obtained by PLAXIS, GeoStudio SEEP/W code was used. This work treats modeling of flows and mechanical and hydraulic behavior of earth dam. A general framework which can fit the calculation of this kind of structures and the coupling of the soil consolidation and free surface flows was defined. In this study; we have confronted a real case modeling of an earth dam. It was shown, in particular, that it is possible to entirely lead the calculation of real dam and to get encouraging results from the hydraulic and mechanical point of view. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=analyzes" title="analyzes">analyzes</a>, <a href="https://publications.waset.org/abstracts/search?q=dam" title=" dam"> dam</a>, <a href="https://publications.waset.org/abstracts/search?q=flow" title=" flow"> flow</a>, <a href="https://publications.waset.org/abstracts/search?q=modeling" title=" modeling"> modeling</a>, <a href="https://publications.waset.org/abstracts/search?q=PLAXIS" title=" PLAXIS"> PLAXIS</a>, <a href="https://publications.waset.org/abstracts/search?q=seep%2Fw" title=" seep/w"> seep/w</a>, <a href="https://publications.waset.org/abstracts/search?q=slope" title=" slope"> slope</a> </p> <a href="https://publications.waset.org/abstracts/84435/modeling-of-the-flow-through-an-earth-dam-and-geotechnical-slope-analyzes" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/84435.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">308</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> Study of the Toxic Activity of the Entomopathogenic Fungus Beauveria bassiana on the Wistar Rat Rattus norvegicus</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=F.%20Haddadj">F. Haddadj</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Hamdi"> S. Hamdi</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Milla"> A. Milla</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Zenia"> S. Zenia</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Smai"> A. Smai</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20Saadi"> H. Saadi</a>, <a href="https://publications.waset.org/abstracts/search?q=F.%20Marniche"> F. Marniche</a>, <a href="https://publications.waset.org/abstracts/search?q=B.%20Doumandji-Mitiche"> B. Doumandji-Mitiche</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The use of a biopesticide based on a microorganism scale requires particular care including safety against the useful auxiliary fauna and mammals among other human beings. Due to its persistence in soil and its apparent human and animal safety, Beauveria bassiana is a cryptogram used for controlling pests organizations, particularly in the locust where its effectiveness has been proven. This fungus is also called for greater respect for biotic communities and the environment. Indeed, biopesticides have several environmental benefits: biodegradability, their activity and selectivity decrease unintended non-target species effects, decreased resistance to some of them. It is in this sense that we contribute by presenting our work on the safety of B. bassiana against mammals. For this we conducted a toxicological study of this fungus strain on Wistar rats Rattus norvegicus, first its effect on weight gain. In a second time were performed histological target organ is the liver. After 20 days of treatment, the results of the toxicological studies have shown that B. bassiana caused no change in the physiological state of rats or weight gain, behavior and diet. On cuts in liver histology revealed no disturbance on the organ. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=B.%20bassiana" title="B. bassiana">B. bassiana</a>, <a href="https://publications.waset.org/abstracts/search?q=entomopathogenic%20fungus" title=" entomopathogenic fungus"> entomopathogenic fungus</a>, <a href="https://publications.waset.org/abstracts/search?q=histology" title=" histology"> histology</a>, <a href="https://publications.waset.org/abstracts/search?q=Rattus%20norvegicus" title=" Rattus norvegicus"> Rattus norvegicus</a> </p> <a href="https://publications.waset.org/abstracts/42602/study-of-the-toxic-activity-of-the-entomopathogenic-fungus-beauveria-bassiana-on-the-wistar-rat-rattus-norvegicus" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/42602.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">5</span> Toxic Activity of the Entomopathogenic Fungus Beauveria bassiana on the Wistar Rat Rattus norvegicus</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=F.%20Haddadj">F. Haddadj</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Hamdi"> S. Hamdi</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Khames"> M. Khames</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Kadi"> A. Kadi</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Zenia"> S. Zenia</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Smai"> A. Smai</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20Saadi"> H. Saadi</a>, <a href="https://publications.waset.org/abstracts/search?q=B.%20Doumandji-Mitiche"> B. Doumandji-Mitiche </a> </p> <p class="card-text"><strong>Abstract:</strong></p> The use of a biopesticide based on a microorganism scale requires particular care including safety against the useful auxiliary fauna and mammals among other human beings. Due to its persistence in soil and its apparent human and animal safety, Beauveria bassiana is a cryptogram used for controlling pests organizations, particularly in the locust where its effectiveness has been proven by several highly studies. This fungus is also called for greater respect for biotic communities and the environment. Indeed, biopesticides have several environmental benefits: biodegradability, their activity and selectivity decrease unintended non-target species effects, decreased resistance to some of them. It is in this sense that we contribute by presenting our work on the safety of B. bassiana against mammals. For this we conducted a toxicological study of this fungus strain on Wistar rats Rattus norvegicus, first its effect on weight gain. In a second time were performed histological target organ is the liver. After 20 days of treatment, the results of the toxicological studies have shown that B. bassiana caused no change in the physiological state of rats or weight gain, behavior and diet. On cuts in liver histology revealed no disturbance on the organ. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=entomopathogenic%20fungus" title="entomopathogenic fungus">entomopathogenic fungus</a>, <a href="https://publications.waset.org/abstracts/search?q=B.%20bassiana" title=" B. bassiana"> B. bassiana</a>, <a href="https://publications.waset.org/abstracts/search?q=Rattus%20norvegicus" title=" Rattus norvegicus"> Rattus norvegicus</a>, <a href="https://publications.waset.org/abstracts/search?q=toxicological%20study" title=" toxicological study"> toxicological study</a>, <a href="https://publications.waset.org/abstracts/search?q=environment" title=" environment"> environment</a> </p> <a href="https://publications.waset.org/abstracts/30997/toxic-activity-of-the-entomopathogenic-fungus-beauveria-bassiana-on-the-wistar-rat-rattus-norvegicus" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/30997.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">315</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> Thermo-Physical and Morphological Properties of Pdlcs Films Doped with Tio2 Nanoparticles.</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Salima%20Bouadjela">Salima Bouadjela</a>, <a href="https://publications.waset.org/abstracts/search?q=Fatima%20Zohra%20Abdoune"> Fatima Zohra Abdoune</a>, <a href="https://publications.waset.org/abstracts/search?q=Lahcene%20Mechernene"> Lahcene Mechernene </a> </p> <p class="card-text"><strong>Abstract:</strong></p> PDLCs are currently considered as promising materials for specific applications such as creation of window blinds controlled by electric field, fog simulators, UV protective glasses, high data storage device etc. We know that the electrical field inside the liquid crystal is low compare with the external electric field [1,2]. An addition of high magnetic and electrical, properties containing compounds to the polymer dispersed liquid crystal (PDLC) will enhance the electrical, optical, and magnetic properties of the PDLC [3,4]. Low Concentration of inorganic nanoparticles TiO2 added to nematic liquid crystals (E7) and also combined with monomers (TPGDA) and cured monomer/LC mixture to elaborate polymer-LC-NP dispersion. The presence of liquid crystal and nanoparticles in TPGDA matrix were conformed and the modified properties of PDLC due to doped nanoparticle were studied and explained by the results of FTIR, POM, UV. Incorporation of nanoparticles modifies the structure of PDLC and thus it makes increase the amount of droplets and decrease in droplet size. we found that the presence of TiO2 nanoparticles leads to a shift the nematic-isotropic transition temperature TNI. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=nanocomposites" title="nanocomposites">nanocomposites</a>, <a href="https://publications.waset.org/abstracts/search?q=PDLC" title=" PDLC"> PDLC</a>, <a href="https://publications.waset.org/abstracts/search?q=phases%20diagram" title=" phases diagram"> phases diagram</a>, <a href="https://publications.waset.org/abstracts/search?q=TiO2" title=" TiO2"> TiO2</a> </p> <a href="https://publications.waset.org/abstracts/30428/thermo-physical-and-morphological-properties-of-pdlcs-films-doped-with-tio2-nanoparticles" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/30428.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">3</span> Toxicity of Biopesticide Metarhizium anisopliae var acridium "Green Muscle" on the Cuticle of the Desert Locust Schistocerca gegaria (Forskål, 1775)</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=F.%20Haddadj">F. Haddadj</a>, <a href="https://publications.waset.org/abstracts/search?q=F.%20Acheuk"> F. Acheuk</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Hamdi"> S. Hamdi</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Zenia"> S. Zenia</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Smai"> A. Smai</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20Saadi"> H. Saadi</a>, <a href="https://publications.waset.org/abstracts/search?q=B.%20Doumandji-Mitiche"> B. Doumandji-Mitiche </a> </p> <p class="card-text"><strong>Abstract:</strong></p> Locust is causing significant losses in agricultural production in the countries concerned by the invasion. Up to the present control strategy has consisted only of the spreaders chemicals; they have proven harmful to the environment and. For this, a new control method appeared it comes to the biological control based mostly by using microorganism. It is in that sense is we've made our contribution by the use of a biopesticide which is entomopathogenic fungus Metarhizium anisopliae var acridium "Green Muscle" on part of the cuticule the larval of fifth instar locust Schistocerca gregaria (Forskål, 1775). Preliminary test on the study of the pathogenicity of M. anisopliae var acridium biocontrol agent, was conducted in the laboratory on L5 S. gregaria, on which we inoculated treatment in the digestive tract and it administrant 20μl of entomopathogenic solution orally at a dose DL50 = 3.25 x107 sp./ ml (median lethal dose estimated at earlier), 5 days after treatment individuals are sacrificed. After dissection cuticles are recovered and then subjected to histological sections. The histological technique followed is that of Martoja Martoja-Pierson (1967). Microscopic observation revealed alterations in the architecture of the cuticule which leads to disorganization of cell layers. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=biopesticide" title="biopesticide">biopesticide</a>, <a href="https://publications.waset.org/abstracts/search?q=cuticle" title=" cuticle"> cuticle</a>, <a href="https://publications.waset.org/abstracts/search?q=desert%20locust" title=" desert locust"> desert locust</a>, <a href="https://publications.waset.org/abstracts/search?q=toxicity" title=" toxicity"> toxicity</a> </p> <a href="https://publications.waset.org/abstracts/17059/toxicity-of-biopesticide-metarhizium-anisopliae-var-acridium-green-muscle-on-the-cuticle-of-the-desert-locust-schistocerca-gegaria-forskal-1775" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/17059.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">479</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">2</span> A Comprehensive Approach in Calculating the Impact of the Ground on Radiated Electromagnetic Fields Due to Lightning</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Lahcene%20Boukelkoul">Lahcene Boukelkoul</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The influence of finite ground conductivity is of great importance in calculating the induced voltages from the radiated electromagnetic fields due to lightning. In this paper, we try to give a comprehensive approach to calculate the impact of the ground on the radiated electromagnetic fields to lightning. The vertical component of lightning electric field is calculated with a reasonable approximation assuming a perfectly conducting ground in case the observation point does not exceed a few kilometres from the lightning channel. However, for distant observation points the radiated vertical component of lightning electric field is attenuated due finitely conducting ground. The attenuation is calculated using the expression elaborated for both low and high frequencies. The horizontal component of the electric field, however, is more affected by a finite conductivity of a ground. Besides, the contribution of the horizontal component of the electric field, to induced voltages on an overhead transmission line, is greater than that of the vertical component. Therefore, the calculation of the horizontal electric field is great concern for the simulation of lightning-induced voltages. For field to transmission lines coupling the ground impedance is calculated for early time behaviour and for low frequency range. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=power%20engineering" title="power engineering">power engineering</a>, <a href="https://publications.waset.org/abstracts/search?q=radiated%20electromagnetic%20fields" title=" radiated electromagnetic fields"> radiated electromagnetic fields</a>, <a href="https://publications.waset.org/abstracts/search?q=lightning-induced%20voltages" title=" lightning-induced voltages"> lightning-induced voltages</a>, <a href="https://publications.waset.org/abstracts/search?q=lightning%20electric%20field" title=" lightning electric field"> lightning electric field</a> </p> <a href="https://publications.waset.org/abstracts/7041/a-comprehensive-approach-in-calculating-the-impact-of-the-ground-on-radiated-electromagnetic-fields-due-to-lightning" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/7041.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">404</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">1</span> Role of von Willebrand Factor Antigen as Non-Invasive Biomarker for the Prediction of Portal Hypertensive Gastropathy in Patients with Liver Cirrhosis</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20El%20Horri">Mohamed El Horri</a>, <a href="https://publications.waset.org/abstracts/search?q=Amine%20Mouden"> Amine Mouden</a>, <a href="https://publications.waset.org/abstracts/search?q=Reda%20Messaoudi"> Reda Messaoudi</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Chekkal"> Mohamed Chekkal</a>, <a href="https://publications.waset.org/abstracts/search?q=Driss%20Benlaldj"> Driss Benlaldj</a>, <a href="https://publications.waset.org/abstracts/search?q=Malika%20Baghdadi"> Malika Baghdadi</a>, <a href="https://publications.waset.org/abstracts/search?q=Lahcene%20Benmahdi"> Lahcene Benmahdi</a>, <a href="https://publications.waset.org/abstracts/search?q=Fatima%20Seghier"> Fatima Seghier</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Background/aim: Recently, the Von Willebrand factor antigen (vWF-Ag)has been identified as a new marker of portal hypertension (PH) and its complications. Few studies talked about its role in the prediction of esophageal varices. VWF-Ag is considered a non-invasive approach, In order to avoid the endoscopic burden, cost, drawbacks, unpleasant and repeated examinations to the patients. In our study, we aimed to evaluate the ability of this marker in the prediction of another complication of portal hypertension, which is portal hypertensive gastropathy (PHG), the one that is diagnosed also by endoscopic tools. Patients and methods: It is about a prospective study, which include 124 cirrhotic patients with no history of bleeding who underwent screening endoscopy for PH-related complications like esophageal varices (EVs) and PHG. Routine biological tests were performed as well as the VWF-Ag testing by both ELFA and Immunoturbidimetric techniques. The diagnostic performance of our marker was assessed using sensitivity, specificity, positive predictive value, negative predictive value, accuracy, and receiver operating characteristic curves. Results: 124 patients were enrolled in this study, with a mean age of 58 years [CI: 55 – 60 years] and a sex ratio of 1.17. Viral etiologies were found in 50% of patients. Screening endoscopy revealed the presence of PHG in 20.2% of cases, while for EVsthey were found in 83.1% of cases. VWF-Ag levels, were significantly increased in patients with PHG compared to those who have not: 441% [CI: 375 – 506], versus 279% [CI: 253 – 304], respectively (p <0.0001). Using the area under the receiver operating characteristic curve (AUC), vWF-Ag was a good predictor for the presence of PHG. With a value higher than 320% and an AUC of 0.824, VWF-Ag had an 84% sensitivity, 74% specificity, 44.7% positive predictive value, 94.8% negative predictive value, and 75.8% diagnostic accuracy. Conclusion: VWF-Ag is a good non-invasive low coast marker for excluding the presence of PHG in patients with liver cirrhosis. Using this marker as part of a selective screening strategy might reduce the need for endoscopic screening and the coast of the management of these kinds of patients. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=von%20willebrand%20factor" title="von willebrand factor">von willebrand factor</a>, <a href="https://publications.waset.org/abstracts/search?q=portal%20hypertensive%20gastropathy" title=" portal hypertensive gastropathy"> portal hypertensive gastropathy</a>, <a href="https://publications.waset.org/abstracts/search?q=prediction" title=" prediction"> prediction</a>, <a href="https://publications.waset.org/abstracts/search?q=liver%20cirrhosis" title=" liver cirrhosis"> liver cirrhosis</a> </p> <a href="https://publications.waset.org/abstracts/143425/role-of-von-willebrand-factor-antigen-as-non-invasive-biomarker-for-the-prediction-of-portal-hypertensive-gastropathy-in-patients-with-liver-cirrhosis" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/143425.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">205</span> </span> </div> </div> </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 href="https://waset.org/page/support">About Us</a></li> <li><a href="https://waset.org/page/support#legal-information">Legal</a></li> <li><a target="_blank" rel="nofollow" href="https://publications.waset.org/static/files/WASET-16th-foundational-anniversary.pdf">WASET celebrates its 16th foundational anniversary</a></li> </ul> </div> <div class="col-md-2"> <ul class="list-unstyled"> Account <li><a href="https://waset.org/profile">My Account</a></li> </ul> </div> <div class="col-md-2"> 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