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Belfeki</title> <meta name="description" content="Search results for: Hamdi Belfeki"> <meta name="keywords" content="Hamdi Belfeki"> <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="Hamdi Belfeki" name="q" aria-label="Search"> <button class="btn btn-light my-2 my-sm-0" type="submit"><i class="fas fa-search"></i></button> </form> </div> <div class="collapse navbar-collapse mt-1" id="navbarMenu"> <ul class="navbar-nav ml-auto align-items-center" id="mainNavMenu"> <li class="nav-item"> <a class="nav-link" href="https://waset.org/conferences" title="Conferences in 2024/2025/2026">Conferences</a> </li> <li class="nav-item"> <a class="nav-link" href="https://waset.org/disciplines" title="Disciplines">Disciplines</a> </li> <li 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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="Hamdi Belfeki"> <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> 54</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: Hamdi Belfeki</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">54</span> α-Amylase Inhibitory Activity of Some Tunisian Aromatic and Medicinal Plants</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hamdi%20Belfeki">Hamdi Belfeki</a>, <a href="https://publications.waset.org/abstracts/search?q=Belgacem%20Chandoul"> Belgacem Chandoul</a>, <a href="https://publications.waset.org/abstracts/search?q=Mnasser%20Hassouna"> Mnasser Hassouna</a>, <a href="https://publications.waset.org/abstracts/search?q=Mondher%20Mejri"> Mondher Mejri</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Aqueous and ethanolic extracts of eight Tunisian aromatic and medicinal plants (TAMP) were characterized by studying their composition in polyphenols and also their antiradical and antioxidant capacities. In absence and in the presence of the various extracts, α-amylase from Bacillus subtlis activity, was measured in order to detect a potential inhibition. The total contents of polyphenols and flavonoid vary in function of TAMP and the mobile phase used for the extraction (distilled water or ethanol). The ethanolic extracts showed the most significant antiradical and antioxidant activities. Only the extracts from Coriandrum sativum showed a significant inhibiting effect on the α-amylase activity. This inhibiting capacity could be correlated with the chemical profile of the two extracts, due to the fact that they have the greatest amount of total flavonoid. The ethanolic extract has the most important antioxidant and anti-radicalizing activities among the sixteen extracts studied. The inhibition kinetics of the two coriander extracts were evaluated by pre-incubation method, using Lineweaver-Burk’s equation, obtained by linearization of Michaeilis-Menten’s expression. The results showed that both extracts exercised a competitive inhibition mechanism. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=%CE%B1-amylase" title="α-amylase">α-amylase</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=aromatic%20and%20medicinal%20plants" title=" aromatic and medicinal plants"> aromatic and medicinal plants</a>, <a href="https://publications.waset.org/abstracts/search?q=inhibition" title=" inhibition"> inhibition</a> </p> <a href="https://publications.waset.org/abstracts/10661/a-amylase-inhibitory-activity-of-some-tunisian-aromatic-and-medicinal-plants" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/10661.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">450</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">53</span> A Very Efficient Pseudo-Random Number Generator Based On Chaotic Maps and S-Box Tables</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20Hamdi">M. Hamdi</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20Rhouma"> R. Rhouma</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Belghith"> S. Belghith </a> </p> <p class="card-text"><strong>Abstract:</strong></p> Generating random numbers are mainly used to create secret keys or random sequences. It can be carried out by various techniques. In this paper we present a very simple and efficient pseudo-random number generator (PRNG) based on chaotic maps and S-Box tables. This technique adopted two main operations one to generate chaotic values using two logistic maps and the second to transform them into binary words using random S-Box tables. The simulation analysis indicates that our PRNG possessing excellent statistical and cryptographic properties. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Random%20Numbers" title="Random Numbers">Random Numbers</a>, <a href="https://publications.waset.org/abstracts/search?q=Chaotic%20map" title=" Chaotic map"> Chaotic map</a>, <a href="https://publications.waset.org/abstracts/search?q=S-box" title=" S-box"> S-box</a>, <a href="https://publications.waset.org/abstracts/search?q=cryptography" title=" cryptography"> cryptography</a>, <a href="https://publications.waset.org/abstracts/search?q=statistical%20tests" title=" statistical tests"> statistical tests</a> </p> <a href="https://publications.waset.org/abstracts/21757/a-very-efficient-pseudo-random-number-generator-based-on-chaotic-maps-and-s-box-tables" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/21757.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">365</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">52</span> A Fault-Tolerant Full Adder in Double Pass CMOS Transistor</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Abdelmonaem%20Ayachi">Abdelmonaem Ayachi</a>, <a href="https://publications.waset.org/abstracts/search?q=Belgacem%20Hamdi"> Belgacem Hamdi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper presents a fault-tolerant implementation for adder schemes using the dual duplication code. To prove the efficiency of the proposed method, the circuit is simulated in double pass transistor CMOS 32nm technology and some transient faults are voluntary injected in the Layout of the circuit. This fully differential implementation requires only 20 transistors which mean that the proposed design involves 28.57% saving in transistor count compared to standard CMOS technology. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=digital%20electronics" title="digital electronics">digital electronics</a>, <a href="https://publications.waset.org/abstracts/search?q=integrated%20circuits" title=" integrated circuits"> integrated circuits</a>, <a href="https://publications.waset.org/abstracts/search?q=full%20adder" title=" full adder"> full adder</a>, <a href="https://publications.waset.org/abstracts/search?q=32nm%20CMOS%20tehnology" title=" 32nm CMOS tehnology"> 32nm CMOS tehnology</a>, <a href="https://publications.waset.org/abstracts/search?q=double%20pass%20transistor%20technology" title=" double pass transistor technology"> double pass transistor technology</a>, <a href="https://publications.waset.org/abstracts/search?q=fault%20toleance" title=" fault toleance"> fault toleance</a>, <a href="https://publications.waset.org/abstracts/search?q=self-checking" title=" self-checking"> self-checking</a> </p> <a href="https://publications.waset.org/abstracts/40794/a-fault-tolerant-full-adder-in-double-pass-cmos-transistor" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/40794.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">346</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">51</span> Carbonylative Cross Coupling of 2-Bromopyridine with Different Boronic Acids under Carbon Monoxide Atmosphere </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=N.%20Touj">N. Touj</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Sauthier"> M. Sauthier</a>, <a href="https://publications.waset.org/abstracts/search?q=L.%20Mansour"> L. Mansour</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20Hamdi"> N. Hamdi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The palladium NHC complexes are one of the most interesting and widely investigated complexes in different catalytic transformations, especially C–C bond. Thus, the use of N-heterocyclic carbenes associated with palladium has been reported as efficient catalysts for the carbonyl coupling under mild and varied conditions. Herein, we report the synthesis, characterization, and cytotoxic activities of two new families of benzimidazolium salts. Then we studied the use of this class of benzimidazolium salts as a ligand in the carbonylative cross-coupling of 2-bromopyridine with different boronic acids under CO atmosphere to form unsymmetrical arylpyridine ketones. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=NHC-Pd%28II%29%20catalysts" title="NHC-Pd(II) catalysts">NHC-Pd(II) catalysts</a>, <a href="https://publications.waset.org/abstracts/search?q=carbonylative%20Suzuki%20cross-coupling%20reaction" title=" carbonylative Suzuki cross-coupling reaction"> carbonylative Suzuki cross-coupling reaction</a>, <a href="https://publications.waset.org/abstracts/search?q=arylboronic%20acids" title=" arylboronic acids"> arylboronic acids</a>, <a href="https://publications.waset.org/abstracts/search?q=2-bromopyridine" title=" 2-bromopyridine"> 2-bromopyridine</a>, <a href="https://publications.waset.org/abstracts/search?q=unsymmetrical%20arylpyridine%20ketones" title=" unsymmetrical arylpyridine ketones"> unsymmetrical arylpyridine ketones</a> </p> <a href="https://publications.waset.org/abstracts/131435/carbonylative-cross-coupling-of-2-bromopyridine-with-different-boronic-acids-under-carbon-monoxide-atmosphere" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/131435.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">50</span> Opto-Mechanical Characterization of Aspheric Lenses from the Hybrid Method</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Aliouane%20Toufik">Aliouane Toufik</a>, <a href="https://publications.waset.org/abstracts/search?q=Hamdi%20Amine"> Hamdi Amine</a>, <a href="https://publications.waset.org/abstracts/search?q=Bouzid%20Djamel"> Bouzid Djamel</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Aspheric optical components are an alternative to the use of conventional lenses in the implementation of imaging systems for the visible range. Spherical lenses are capable of producing aberrations. Therefore, they are not able to focus all the light into a single point. Instead, aspherical lenses correct aberrations and provide better resolution even with compact lenses incorporating a small number of lenses. Metrology of these components is very difficult especially when the resolution requirements increase and insufficient or complexity of conventional tools requires the development of specific approaches to characterization. This work is part of the problem existed because the objectives are the study and comparison of different methods used to measure surface rays hybrid aspherical lenses. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=manufacture%20of%20lenses" title="manufacture of lenses">manufacture of lenses</a>, <a href="https://publications.waset.org/abstracts/search?q=aspherical%20surface" title=" aspherical surface"> aspherical surface</a>, <a href="https://publications.waset.org/abstracts/search?q=precision%20molding" title=" precision molding"> precision molding</a>, <a href="https://publications.waset.org/abstracts/search?q=radius%20of%20curvature" title=" radius of curvature"> radius of curvature</a>, <a href="https://publications.waset.org/abstracts/search?q=roughness" title=" roughness "> roughness </a> </p> <a href="https://publications.waset.org/abstracts/8939/opto-mechanical-characterization-of-aspheric-lenses-from-the-hybrid-method" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/8939.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">467</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">49</span> E-Learning Approaches Based on Artificial Intelligence Techniques: A Survey</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nabila%20Daly">Nabila Daly</a>, <a href="https://publications.waset.org/abstracts/search?q=Hamdi%20Ellouzi"> Hamdi Ellouzi</a>, <a href="https://publications.waset.org/abstracts/search?q=Hela%20Ltifi"> Hela Ltifi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In last year’s, several recent researches’ that focus on e-learning approaches having as goal to improve pedagogy and student’s academy level assessment. E-learning-related works have become an important research file nowadays due to several problems that make it impossible for students join classrooms, especially in last year’s. Among those problems, we note the current epidemic problems in the word case of Covid-19. For those reasons, several e-learning-related works based on Artificial Intelligence techniques are proposed to improve distant education targets. In the current paper, we will present a short survey of the most relevant e-learning based on Artificial Intelligence techniques giving birth to newly developed e-learning tools that rely on new technologies. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=artificial%20intelligence%20techniques" title="artificial intelligence techniques">artificial intelligence techniques</a>, <a href="https://publications.waset.org/abstracts/search?q=decision" title=" decision"> decision</a>, <a href="https://publications.waset.org/abstracts/search?q=e-learning" title=" e-learning"> e-learning</a>, <a href="https://publications.waset.org/abstracts/search?q=support%20system" title=" support system"> support system</a>, <a href="https://publications.waset.org/abstracts/search?q=survey" title=" survey"> survey</a> </p> <a href="https://publications.waset.org/abstracts/142734/e-learning-approaches-based-on-artificial-intelligence-techniques-a-survey" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/142734.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">225</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">48</span> Thermodynamic Analysis of Zeotropic Mixture Used in Low Temperature Solar Rankine Cycle with Ejector for Power Generation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Basma%20Hamdi">Basma Hamdi</a>, <a href="https://publications.waset.org/abstracts/search?q=Lakdar%20Kairouani"> Lakdar Kairouani</a>, <a href="https://publications.waset.org/abstracts/search?q=Ezzedine%20Nahdi"> Ezzedine Nahdi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The objective of this work is to present a thermodynamic analysis of low temperature solar Rankine cycle with ejector for power generation using zeotropic mixtures. Based on theoretical calculation, effects of zeotropic mixtures compositions on the performance of solar Rankine cycle with ejector are discussed and compared with corresponding pure fluids. Variations of net power output, thermal efficiency were calculating with changing evaporation temperature. The ejector coefficient had analyzed as independent variable. The result show that (R245fa/R152a) has a higher thermal efficiency than using pure fluids. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=zeotropic%20mixture" title="zeotropic mixture">zeotropic mixture</a>, <a href="https://publications.waset.org/abstracts/search?q=thermodynamic%20analysis" title=" thermodynamic analysis"> thermodynamic analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=ejector" title=" ejector"> ejector</a>, <a href="https://publications.waset.org/abstracts/search?q=low-temperature%20solar%20rankine%20cycle" title=" low-temperature solar rankine cycle"> low-temperature solar rankine cycle</a> </p> <a href="https://publications.waset.org/abstracts/58827/thermodynamic-analysis-of-zeotropic-mixture-used-in-low-temperature-solar-rankine-cycle-with-ejector-for-power-generation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/58827.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">281</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">47</span> Highly Transparent, Hydrophobic and Self-Cleaning ZnO-Durazane Based Hybrid Organic-Inorganic Coatings</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Abderrahmane%20Hamdi">Abderrahmane Hamdi</a>, <a href="https://publications.waset.org/abstracts/search?q=Julie%20Chalon"> Julie Chalon</a>, <a href="https://publications.waset.org/abstracts/search?q=Benoit%20Dodin"> Benoit Dodin</a>, <a href="https://publications.waset.org/abstracts/search?q=Philippe%20Champagne"> Philippe Champagne</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this report, we present a simple route to realize robust, hydrophobic, and highly transparent coatings using organic polysilazane (durazane) and zinc oxide nanoparticles (ZnO). These coatings were deposited by spraying the mixture solution on glass slides. Thus, the properties of the films were characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), UV–vis-NIR spectrophotometer, and water contact angle method. This sprayable polymer mixed with ZnO nanoparticles shows high transparency for visible light > 90%, a hydrophobic character (CA > 90°), and good mechanical and chemical stability. The coating also demonstrates excellent self-cleaning properties, which makes it a promising candidate for commercial use. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=coatings" title="coatings">coatings</a>, <a href="https://publications.waset.org/abstracts/search?q=durability" title=" durability"> durability</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrophobicity" title=" hydrophobicity"> hydrophobicity</a>, <a href="https://publications.waset.org/abstracts/search?q=organic%20polysilazane" title=" organic polysilazane"> organic polysilazane</a>, <a href="https://publications.waset.org/abstracts/search?q=self-cleaning" title=" self-cleaning"> self-cleaning</a>, <a href="https://publications.waset.org/abstracts/search?q=transparence" title=" transparence"> transparence</a>, <a href="https://publications.waset.org/abstracts/search?q=zinc%20oxide%20nanoparticles" title=" zinc oxide nanoparticles"> zinc oxide nanoparticles</a> </p> <a href="https://publications.waset.org/abstracts/124131/highly-transparent-hydrophobic-and-self-cleaning-zno-durazane-based-hybrid-organic-inorganic-coatings" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/124131.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">170</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">46</span> Isolation and Characterization of Salt-Tolerance of Rhizobia under the Effects of Salinity</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sarra%20Sobti">Sarra Sobti</a>, <a href="https://publications.waset.org/abstracts/search?q=Baelhadj%20Hamdi-A%C3%AFssa"> Baelhadj Hamdi-Aïssa</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The bacteria of the soil, usually called rhizobium, have a considerable importance in agriculture because of their capacity to fix the atmospheric nitrogen in symbiosis with the plants of the family of legumes. The present work was to study the effect of the salinity on growth and nodulation of alfalfa-rhizobia symbiosis at different agricultural experimental sites in Ouargla. The experiment was conducted in 3 steps. The first one was the isolation and characterization of the Rhizobia; next, the evolution of the isolates tolerance to salinity at three levels of NaCl (6, 8,12 and 16 g/L); and the last step was the evolution of the tolerance on symbiotic characteristics. The results showed that the phenotypic characterizations behave practically as Rhizobia spp, and the effects of salinity affect the symbiotic process. The tolerance to high levels of salinity and the survival and persistence in severe and harsh desert conditions make these rhizobia highly valuable inoculums to improve productivity of the leguminous plants cultivated under extreme environments. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=rhizobia" title="rhizobia">rhizobia</a>, <a href="https://publications.waset.org/abstracts/search?q=symbiosis" title=" symbiosis"> symbiosis</a>, <a href="https://publications.waset.org/abstracts/search?q=salinity" title=" salinity"> salinity</a>, <a href="https://publications.waset.org/abstracts/search?q=tolerance" title=" tolerance"> tolerance</a>, <a href="https://publications.waset.org/abstracts/search?q=nodulation" title=" nodulation"> nodulation</a>, <a href="https://publications.waset.org/abstracts/search?q=soil" title=" soil"> soil</a>, <a href="https://publications.waset.org/abstracts/search?q=Medicago%20sativa%20L." title=" Medicago sativa L."> Medicago sativa L.</a> </p> <a href="https://publications.waset.org/abstracts/8701/isolation-and-characterization-of-salt-tolerance-of-rhizobia-under-the-effects-of-salinity" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/8701.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">319</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">45</span> Comparison of DPC and FOC Vector Control Strategies on Reducing Harmonics Caused by Nonlinear Load in the DFIG Wind Turbine </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hamid%20Havasi">Hamid Havasi</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamad%20Reza%20Gholami%20Dehbalaei"> Mohamad Reza Gholami Dehbalaei</a>, <a href="https://publications.waset.org/abstracts/search?q=Hamed%20Khorami"> Hamed Khorami</a>, <a href="https://publications.waset.org/abstracts/search?q=Shahram%20Karimi"> Shahram Karimi</a>, <a href="https://publications.waset.org/abstracts/search?q=Hamdi%20Abdi"> Hamdi Abdi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Doubly-fed induction generator (DFIG) equipped with a power converter is an efficient tool for converting mechanical energy of a variable speed system to a fixed-frequency electrical grid. Since electrical energy sources faces with production problems such as harmonics caused by nonlinear loads, so in this paper, compensation performance of DPC and FOC method on harmonics reduction of a DFIG wind turbine connected to a nonlinear load in MATLAB Simulink model has been simulated and effect of each method on nonlinear load harmonic elimination has been compared. Results of the two mentioned control methods shows the advantage of the FOC method on DPC method for harmonic compensation. Also, the fifth and seventh harmonic components of the network and THD greatly reduced. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=DFIG%20machine" title="DFIG machine">DFIG machine</a>, <a href="https://publications.waset.org/abstracts/search?q=energy%20conversion" title=" energy conversion"> energy conversion</a>, <a href="https://publications.waset.org/abstracts/search?q=nonlinear%20load" title=" nonlinear load"> nonlinear load</a>, <a href="https://publications.waset.org/abstracts/search?q=THD" title=" THD"> THD</a>, <a href="https://publications.waset.org/abstracts/search?q=DPC" title=" DPC"> DPC</a>, <a href="https://publications.waset.org/abstracts/search?q=FOC" title=" FOC"> FOC</a> </p> <a href="https://publications.waset.org/abstracts/15405/comparison-of-dpc-and-foc-vector-control-strategies-on-reducing-harmonics-caused-by-nonlinear-load-in-the-dfig-wind-turbine" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/15405.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">589</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">44</span> End-to-End Performance of MPPM in Multihop MIMO-FSO System Over Dependent GG Atmospheric Turbulence Channels</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hechmi%20Saidi">Hechmi Saidi</a>, <a href="https://publications.waset.org/abstracts/search?q=Noureddine%20Hamdi"> Noureddine Hamdi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The performance of decode and forward (DF) multihop free space optical (FSO) scheme deploying multiple input multiple output (MIMO) configuration under gamma-gamma (GG) statistical distribution, that adopts M-ary pulse position modulation (MPPM) coding, is investigated. We have extracted exact and estimated values of symbol-error rates (SERs) respectively. The probability density function (PDF)’s closed-form formula is expressed for our designed system. Thanks to the use of DF multihop MIMO FSO configuration and MPPM signaling, atmospheric turbulence is combatted; hence the transmitted signal quality is improved. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=free%20space%20optical" title="free space optical">free space optical</a>, <a href="https://publications.waset.org/abstracts/search?q=gamma%20gamma%20channel" title=" gamma gamma channel"> gamma gamma channel</a>, <a href="https://publications.waset.org/abstracts/search?q=radio%20frequency" title=" radio frequency"> radio frequency</a>, <a href="https://publications.waset.org/abstracts/search?q=decode%20and%20forward" title=" decode and forward"> decode and forward</a>, <a href="https://publications.waset.org/abstracts/search?q=multiple-input%20multiple-output" title=" multiple-input multiple-output"> multiple-input multiple-output</a>, <a href="https://publications.waset.org/abstracts/search?q=M-ary%20pulse%20position%20modulation" title=" M-ary pulse position modulation"> M-ary pulse position modulation</a>, <a href="https://publications.waset.org/abstracts/search?q=symbol%20error%20rate" title=" symbol error rate"> symbol error rate</a> </p> <a href="https://publications.waset.org/abstracts/91635/end-to-end-performance-of-mppm-in-multihop-mimo-fso-system-over-dependent-gg-atmospheric-turbulence-channels" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/91635.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">250</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">43</span> Preparation of Geopolymer Cements from Tunisian Illito-Kaolinitic Clay Mineral</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=N.%20Hamdi">N. Hamdi</a>, <a href="https://publications.waset.org/abstracts/search?q=E.%20Srasra"> E. Srasra</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this work geopolymer cement are synthesized from Tunisian (illito-kaolinitic) clay. This product can be used as binding material in place of cement Portland. The clay fractions used were characterized with physico-chemical and thermal analyses. The clays materials react with alkaline solution (10, 14 and 18 mol(NaOH)/L) in order to produce geopolymer cements whose pastes were characterized by determining their water adsorption and compressive strength. The compressive strength of the hardened geopolymer cement paste samples aged 28 days attained its highest value (32.3MPa) around 950°C for NaOH concentration of 14M. The water adsorption value of the prepared samples decreased with increasing the calcination temperature of clay fractions. It can be concluded that the most suitable temperature for the calcination of illitio-kaolinitic clays in view of producing geopolymer cements is around 950°C. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=compressive%20strength" title="compressive strength">compressive strength</a>, <a href="https://publications.waset.org/abstracts/search?q=geopolymer%20cement" title=" geopolymer cement"> geopolymer cement</a>, <a href="https://publications.waset.org/abstracts/search?q=illitio-kaolinitic%20clay" title=" illitio-kaolinitic clay"> illitio-kaolinitic clay</a>, <a href="https://publications.waset.org/abstracts/search?q=mineral" title=" mineral"> mineral</a> </p> <a href="https://publications.waset.org/abstracts/17201/preparation-of-geopolymer-cements-from-tunisian-illito-kaolinitic-clay-mineral" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/17201.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">252</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">42</span> Improvement on a CNC Gantry Machine Structure Design for Higher Machining Speed Capability</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20A.%20D.%20Sarhan">Ahmed A. D. Sarhan</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20R.%20Besharaty"> S. R. Besharaty</a>, <a href="https://publications.waset.org/abstracts/search?q=Javad%20Akbaria"> Javad Akbaria</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Hamdi"> M. Hamdi </a> </p> <p class="card-text"><strong>Abstract:</strong></p> The capability of CNC gantry milling machines in manufacturing long components has caused the expanded use of such machines. On the other hand, the machines’ gantry rigidity can reduce under severe loads or vibration during operation. Indeed, the quality of machining is dependent on the machine’s dynamic behavior throughout the operating process. For this reason, this type of machines has always been used prudently and are non efficient. Therefore, they can usually be employed for rough machining and may not produce adequate surface finishing. In this paper, a CNC gantry milling machine with the potential to produce good surface finish has been designed and analyzed. The lowest natural frequency of this machine is 202 Hz at all motion amplitudes with a full range of suitable frequency responses. Meanwhile, the maximum deformation under dead loads for the gantry machine is 0.565µm, indicating that this machine tool is capable of producing higher product quality. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=frequency%20response" title="frequency response">frequency response</a>, <a href="https://publications.waset.org/abstracts/search?q=finite%20element" title=" finite element"> finite element</a>, <a href="https://publications.waset.org/abstracts/search?q=gantry%20machine" title=" gantry machine"> gantry machine</a>, <a href="https://publications.waset.org/abstracts/search?q=gantry%20design" title=" gantry design"> gantry design</a>, <a href="https://publications.waset.org/abstracts/search?q=static%20and%20dynamic%20analysis" title=" static and dynamic analysis "> static and dynamic analysis </a> </p> <a href="https://publications.waset.org/abstracts/28003/improvement-on-a-cnc-gantry-machine-structure-design-for-higher-machining-speed-capability" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/28003.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">357</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">41</span> Effect of Different Contact Rollers on the Surface Texture during the Belt Grinding Process</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Amine%20Hamdi">Amine Hamdi</a>, <a href="https://publications.waset.org/abstracts/search?q=Sidi%20Mohammed%20Merghache"> Sidi Mohammed Merghache</a>, <a href="https://publications.waset.org/abstracts/search?q=Brahim%20Fernini"> Brahim Fernini</a> </p> <p class="card-text"><strong>Abstract:</strong></p> During abrasive machining of hard steels by belt grinding, the finished surface texture is influenced by the pressure between the abrasive belt and the workpiece; this pressure is the force applied by the contact roller on the workpiece. Therefore, the contact roller has an important role and has a direct impact on process efficiency. The objective of this article is to study and compare the influence of different contact rollers on the belt ground surface texture. The quality of the surface texture is characterized by eight roughness parameters (Ra, Rz, Rp, Rv, Rsk, Rku, Rsm, and Rdq) and five parameters of the bearing area curve (Rpk, Rk, Rvk, Mr1, and Mr2). The results of the experimental tests indicate a better surface texture obtained by the PA 6 polyamide roller (hardness 60 Shore D) compared to that obtained with other rollers of the same hardness or of different hardness. Simultaneously, optimum medium pressure between the belt and the workpiece allows chip removal without fracturing the abrasive grains. This generates a good surface texture. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=belt%20grinding" title="belt grinding">belt grinding</a>, <a href="https://publications.waset.org/abstracts/search?q=contact%20roller" title=" contact roller"> contact roller</a>, <a href="https://publications.waset.org/abstracts/search?q=pressure" title=" pressure"> pressure</a>, <a href="https://publications.waset.org/abstracts/search?q=abrasive%20belt" title=" abrasive belt"> abrasive belt</a>, <a href="https://publications.waset.org/abstracts/search?q=surface%20texture" title=" surface texture"> surface texture</a> </p> <a href="https://publications.waset.org/abstracts/132926/effect-of-different-contact-rollers-on-the-surface-texture-during-the-belt-grinding-process" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/132926.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">184</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">40</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">39</span> Performance Analysis of a Hybrid DF-AF Hybrid RF/FSO System under Gamma Gamma Atmospheric Turbulence Channel Using MPPM Modulation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hechmi%20Saidi">Hechmi Saidi</a>, <a href="https://publications.waset.org/abstracts/search?q=Noureddine%20Hamdi"> Noureddine Hamdi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The performance of hybrid amplify and forward - decode and forward (AF-DF) hybrid radio frequency/free space optical (RF/FSO) communication system, that adopts M-ary pulse position modulation (MPPM) techniques, is analyzed. Both exact and approximate symbol-error rates (SERs) are derived. The random variations of the received optical irradiance, produced by the atmospheric turbulence, is modeled by the gamma-gamma (GG) statistical distribution. A closed-form expression for the probability density function (PDF) is derived for the whole above system is obtained. Thanks to the use of hybrid AF-DF hybrid RF/FSO configuration and MPPM, the effects of atmospheric turbulence is mitigated; hence the capacity of combating atmospheric turbulence and the transmissitted signal quality are improved. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=free%20space%20optical" title="free space optical">free space optical</a>, <a href="https://publications.waset.org/abstracts/search?q=gamma%20gamma%20channel" title=" gamma gamma channel"> gamma gamma channel</a>, <a href="https://publications.waset.org/abstracts/search?q=radio%20frequency" title=" radio frequency"> radio frequency</a>, <a href="https://publications.waset.org/abstracts/search?q=decode%20and%20forward" title=" decode and forward"> decode and forward</a>, <a href="https://publications.waset.org/abstracts/search?q=error%20pointing" title=" error pointing"> error pointing</a>, <a href="https://publications.waset.org/abstracts/search?q=M-ary%20pulse%20position%20modulation" title=" M-ary pulse position modulation"> M-ary pulse position modulation</a>, <a href="https://publications.waset.org/abstracts/search?q=symbol%20error%20rate" title=" symbol error rate"> symbol error rate</a> </p> <a href="https://publications.waset.org/abstracts/90571/performance-analysis-of-a-hybrid-df-af-hybrid-rffso-system-under-gamma-gamma-atmospheric-turbulence-channel-using-mppm-modulation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/90571.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">287</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">38</span> Performance Analysis of M-Ary Pulse Position Modulation in Multihop Multiple Input Multiple Output-Free Space Optical System over Uncorrelated Gamma-Gamma Atmospheric Turbulence Channels</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hechmi%20Saidi">Hechmi Saidi</a>, <a href="https://publications.waset.org/abstracts/search?q=Noureddine%20Hamdi"> Noureddine Hamdi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The performance of Decode and Forward (DF) multihop Free Space Optical ( FSO) scheme deploying Multiple Input Multiple Output (MIMO) configuration under Gamma-Gamma (GG) statistical distribution, that adopts M-ary Pulse Position Modulation (MPPM) coding, is investigated. We have extracted exact and estimated values of Symbol-Error Rates (SERs) respectively. A closed form formula related to the Probability Density Function (PDF) is expressed for our designed system. Thanks to the use of DF multihop MIMO FSO configuration and MPPM signaling, atmospheric turbulence is combatted; hence the transmitted signal quality is improved. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=free%20space%20optical" title="free space optical">free space optical</a>, <a href="https://publications.waset.org/abstracts/search?q=multiple%20input%20multiple%20output" title=" multiple input multiple output"> multiple input multiple output</a>, <a href="https://publications.waset.org/abstracts/search?q=M-ary%20pulse%20position%20modulation" title=" M-ary pulse position modulation"> M-ary pulse position modulation</a>, <a href="https://publications.waset.org/abstracts/search?q=multihop" title=" multihop"> multihop</a>, <a href="https://publications.waset.org/abstracts/search?q=decode%20and%20forward" title=" decode and forward"> decode and forward</a>, <a href="https://publications.waset.org/abstracts/search?q=symbol%20error%20rate" title=" symbol error rate"> symbol error rate</a>, <a href="https://publications.waset.org/abstracts/search?q=gamma-gamma%20channel" title=" gamma-gamma channel"> gamma-gamma channel</a> </p> <a href="https://publications.waset.org/abstracts/91351/performance-analysis-of-m-ary-pulse-position-modulation-in-multihop-multiple-input-multiple-output-free-space-optical-system-over-uncorrelated-gamma-gamma-atmospheric-turbulence-channels" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/91351.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">199</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">37</span> Dual-Rail Logic Unit in Double Pass Transistor Logic</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hamdi%20Belgacem">Hamdi Belgacem</a>, <a href="https://publications.waset.org/abstracts/search?q=Fradi%20Aymen"> Fradi Aymen</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper we present a low power, low cost differential logic unit (LU). The proposed LU receives dual-rail inputs and generates dual-rail outputs. The proposed circuit can be used in Arithmetic and Logic Units (ALU) of processor. It can be also dedicated for self-checking applications based on dual duplication code. Four logic functions as well as their inverses are implemented within a single Logic Unit. The hardware overhead for the implementation of the proposed LU is lower than the hardware overhead required for standard LU implemented with standard CMOS logic style. This new implementation is attractive as fewer transistors are required to implement important logic functions. The proposed differential logic unit can perform 8 Boolean logical operations by using only 16 transistors. Spice simulations using a 32 nm technology was utilized to evaluate the performance of the proposed circuit and to prove its acceptable electrical behaviour. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=differential%20logic%20unit" title="differential logic unit">differential logic unit</a>, <a href="https://publications.waset.org/abstracts/search?q=double%20pass%20transistor%20logic" title=" double pass transistor logic"> double pass transistor logic</a>, <a href="https://publications.waset.org/abstracts/search?q=low%20power%20CMOS%20design" title=" low power CMOS design"> low power CMOS design</a>, <a href="https://publications.waset.org/abstracts/search?q=low%20cost%20CMOS%20design" title=" low cost CMOS design"> low cost CMOS design</a> </p> <a href="https://publications.waset.org/abstracts/35814/dual-rail-logic-unit-in-double-pass-transistor-logic" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/35814.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">452</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">36</span> Synthesis and Characterization of Fluorine-Free, Hydrophobic and Highly Transparent Coatings </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Abderrahmane%20Hamdi">Abderrahmane Hamdi</a>, <a href="https://publications.waset.org/abstracts/search?q=Julie%20Chalon"> Julie Chalon</a>, <a href="https://publications.waset.org/abstracts/search?q=Benoit%20Dodin"> Benoit Dodin</a>, <a href="https://publications.waset.org/abstracts/search?q=Philippe%20Champagne"> Philippe Champagne</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This research work concerns the synthesis of hydrophobic and self-cleaning coatings as an alternative to fluorine-based coatings used on glass. The developed, highly transparent coatings are produced by a chemical route (sol-gel method) using two silica-based precursors, hexamethyldisilazane and tetraethoxysilane (HMDS/TEOS). The addition of zinc oxide nanoparticles (ZnO NPs) within the gel provides a photocatalytic property to the final coating. The prepared gels were deposited on glass slides using different methods. The properties of the coatings were characterized by optical microscopy, scanning electron microscopy, UV-VIS-NIR spectrophotometer, and water contact angle method. The results show that the obtained coatings are homogeneous and have a hydrophobic character. In particular, after thermal treatment, the HMDS/TEOS@ZnO charged gel deposited on glass constitutes a coating capable of degrading methylene blue (MB) under UV irradiation. Optical transmission reaches more than 90% in most of the visible light spectrum. Synthetized coatings have also demonstrated their mechanical durability and self-cleaning ability. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=coating" title="coating">coating</a>, <a href="https://publications.waset.org/abstracts/search?q=durability" title=" durability"> durability</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrophobicity" title=" hydrophobicity"> hydrophobicity</a>, <a href="https://publications.waset.org/abstracts/search?q=sol-gel" title=" sol-gel"> sol-gel</a>, <a href="https://publications.waset.org/abstracts/search?q=self-cleaning" title=" self-cleaning"> self-cleaning</a>, <a href="https://publications.waset.org/abstracts/search?q=transparence" title=" transparence"> transparence</a> </p> <a href="https://publications.waset.org/abstracts/122907/synthesis-and-characterization-of-fluorine-free-hydrophobic-and-highly-transparent-coatings" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/122907.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">162</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">35</span> Oil Recovery Study by Low Temperature Carbon Dioxide Injection in High-Pressure High-Temperature Micromodels</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Zakaria%20Hamdi">Zakaria Hamdi</a>, <a href="https://publications.waset.org/abstracts/search?q=Mariyamni%20Awang"> Mariyamni Awang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> For the past decades, CO<sub>2</sub> flooding has been used as a successful method for enhanced oil recovery (EOR). However, high mobility ratio and fingering effect are considered as important drawbacka of this process. Low temperature injection of CO<sub>2</sub> into high temperature reservoirs may improve the oil recovery, but simulating multiphase flow in the non-isothermal medium is difficult, and commercial simulators are very unstable in these conditions. Furthermore, to best of authors’ knowledge, no experimental work was done to verify the results of the simulations and to understand the pore-scale process. In this paper, we present results of investigations on injection of low temperature CO<sub>2</sub> into a high-pressure high-temperature micromodel with injection temperature range from 34 to 75 °F. Effect of temperature and saturation changes of different fluids are measured in each case. The results prove the proposed method. The injection of CO<sub>2</sub> at low temperatures increased the oil recovery in high temperature reservoirs significantly. Also, CO<sub>2</sub> rich phases available in the high temperature system can affect the oil recovery through the better sweep of the oil which is initially caused by penetration of LCO<sub>2</sub> inside the system. Furthermore, no unfavorable effect was detected using this method. Low temperature CO<sub>2</sub> is proposed to be used as early as secondary recovery. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=enhanced%20oil%20recovery" title="enhanced oil recovery">enhanced oil recovery</a>, <a href="https://publications.waset.org/abstracts/search?q=CO%E2%82%82%20flooding" title=" CO₂ flooding"> CO₂ flooding</a>, <a href="https://publications.waset.org/abstracts/search?q=micromodel%20studies" title=" micromodel studies"> micromodel studies</a>, <a href="https://publications.waset.org/abstracts/search?q=miscible%20flooding" title=" miscible flooding"> miscible flooding</a> </p> <a href="https://publications.waset.org/abstracts/71727/oil-recovery-study-by-low-temperature-carbon-dioxide-injection-in-high-pressure-high-temperature-micromodels" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/71727.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">352</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">34</span> Design and Study of a Hybrid Micro-CSP/Biomass Boiler System for Water and Space Heating in Traditional Hammam</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Said%20Lamghari">Said Lamghari</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdelkader%20Outzourhit"> Abdelkader Outzourhit</a>, <a href="https://publications.waset.org/abstracts/search?q=Hassan%20Hamdi"> Hassan Hamdi</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Krarouch"> Mohamed Krarouch</a>, <a href="https://publications.waset.org/abstracts/search?q=Fatima%20Ait%20Nouh"> Fatima Ait Nouh</a>, <a href="https://publications.waset.org/abstracts/search?q=Mickael%20Benhaim"> Mickael Benhaim</a>, <a href="https://publications.waset.org/abstracts/search?q=Mehdi%20Khaldoun"> Mehdi Khaldoun</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Traditional Hammams are big consumers of water and wood-energy. Any approach to reduce this consumption will contribute to the preservation of these two resources that are more and more stressed in Morocco. In the InnoTherm/InnoBiomass 2014 project HYBRIDBATH, funded by the Research Institute for Solar Energy and New Energy (IRESEN), we will use a hybrid system consisting of a micro-CSP system and a biomass boiler for water and space heating of a Hammam. This will overcome the problem of intermittency of solar energy, and will ensure continuous supply of hot water and heat. We propose to use local agricultural residues (olive pomace, shells of walnuts, almonds, Argan ...). Underfloor heating using either copper or PEX tubing will perform the space heating. This work focuses on the description of the system and the activities carried out so far: The installation of the system, the principle operation of the system and some preliminary test results. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=biomass%20boiler" title="biomass boiler">biomass boiler</a>, <a href="https://publications.waset.org/abstracts/search?q=hot%20water" title=" hot water"> hot water</a>, <a href="https://publications.waset.org/abstracts/search?q=hybrid%20systems" title=" hybrid systems"> hybrid systems</a>, <a href="https://publications.waset.org/abstracts/search?q=micro-CSP" title=" micro-CSP"> micro-CSP</a>, <a href="https://publications.waset.org/abstracts/search?q=parabolic%20sensor" title=" parabolic sensor"> parabolic sensor</a>, <a href="https://publications.waset.org/abstracts/search?q=solar%20energy" title=" solar energy"> solar energy</a>, <a href="https://publications.waset.org/abstracts/search?q=solar%20fraction" title=" solar fraction"> solar fraction</a>, <a href="https://publications.waset.org/abstracts/search?q=traditional%20hammam" title=" traditional hammam"> traditional hammam</a>, <a href="https://publications.waset.org/abstracts/search?q=underfloor%20heating" title=" underfloor heating"> underfloor heating</a> </p> <a href="https://publications.waset.org/abstracts/63875/design-and-study-of-a-hybrid-micro-cspbiomass-boiler-system-for-water-and-space-heating-in-traditional-hammam" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/63875.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">312</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">33</span> Long Short-Term Memory Based Model for Modeling Nicotine Consumption Using an Electronic Cigarette and Internet of Things Devices</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hamdi%20Amroun">Hamdi Amroun</a>, <a href="https://publications.waset.org/abstracts/search?q=Yacine%20Benziani"> Yacine Benziani</a>, <a href="https://publications.waset.org/abstracts/search?q=Mehdi%20Ammi"> Mehdi Ammi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, we want to determine whether the accurate prediction of nicotine concentration can be obtained by using a network of smart objects and an e-cigarette. The approach consists of, first, the recognition of factors influencing smoking cessation such as physical activity recognition and participant’s behaviors (using both smartphone and smartwatch), then the prediction of the configuration of the e-cigarette (in terms of nicotine concentration, power, and resistance of e-cigarette). The study uses a network of commonly connected objects; a smartwatch, a smartphone, and an e-cigarette transported by the participants during an uncontrolled experiment. The data obtained from sensors carried in the three devices were trained by a Long short-term memory algorithm (LSTM). Results show that our LSTM-based model allows predicting the configuration of the e-cigarette in terms of nicotine concentration, power, and resistance with a root mean square error percentage of 12.9%, 9.15%, and 11.84%, respectively. This study can help to better control consumption of nicotine and offer an intelligent configuration of the e-cigarette to users. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Iot" title="Iot">Iot</a>, <a href="https://publications.waset.org/abstracts/search?q=activity%20recognition" title=" activity recognition"> activity recognition</a>, <a href="https://publications.waset.org/abstracts/search?q=automatic%20classification" title=" automatic classification"> automatic classification</a>, <a href="https://publications.waset.org/abstracts/search?q=unconstrained%20environment" title=" unconstrained environment"> unconstrained environment</a> </p> <a href="https://publications.waset.org/abstracts/89965/long-short-term-memory-based-model-for-modeling-nicotine-consumption-using-an-electronic-cigarette-and-internet-of-things-devices" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/89965.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">224</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">32</span> Recommender System Based on Mining Graph Databases for Data-Intensive Applications</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mostafa%20Gamal">Mostafa Gamal</a>, <a href="https://publications.waset.org/abstracts/search?q=Hoda%20K.%20Mohamed"> Hoda K. Mohamed</a>, <a href="https://publications.waset.org/abstracts/search?q=Islam%20El-Maddah"> Islam El-Maddah</a>, <a href="https://publications.waset.org/abstracts/search?q=Ali%20Hamdi"> Ali Hamdi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In recent years, many digital documents on the web have been created due to the rapid growth of ’social applications’ communities or ’Data-intensive applications’. The evolution of online-based multimedia data poses new challenges in storing and querying large amounts of data for online recommender systems. Graph data models have been shown to be more efficient than relational data models for processing complex data. This paper will explain the key differences between graph and relational databases, their strengths and weaknesses, and why using graph databases is the best technology for building a realtime recommendation system. Also, The paper will discuss several similarity metrics algorithms that can be used to compute a similarity score of pairs of nodes based on their neighbourhoods or their properties. Finally, the paper will discover how NLP strategies offer the premise to improve the accuracy and coverage of realtime recommendations by extracting the information from the stored unstructured knowledge, which makes up the bulk of the world’s data to enrich the graph database with this information. As the size and number of data items are increasing rapidly, the proposed system should meet current and future needs. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=graph%20databases" title="graph databases">graph databases</a>, <a href="https://publications.waset.org/abstracts/search?q=NLP" title=" NLP"> NLP</a>, <a href="https://publications.waset.org/abstracts/search?q=recommendation%20systems" title=" recommendation systems"> recommendation systems</a>, <a href="https://publications.waset.org/abstracts/search?q=similarity%20metrics" title=" similarity metrics"> similarity metrics</a> </p> <a href="https://publications.waset.org/abstracts/163018/recommender-system-based-on-mining-graph-databases-for-data-intensive-applications" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/163018.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">104</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> A Neural Network Model to Simulate Urban Air Temperatures in Toulouse, France</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hiba%20Hamdi">Hiba Hamdi</a>, <a href="https://publications.waset.org/abstracts/search?q=Thomas%20Corpetti"> Thomas Corpetti</a>, <a href="https://publications.waset.org/abstracts/search?q=Laure%20Roupioz"> Laure Roupioz</a>, <a href="https://publications.waset.org/abstracts/search?q=Xavier%20Briottet"> Xavier Briottet</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Air temperatures are generally higher in cities than in their rural surroundings. The overheating of cities is a direct consequence of increasing urbanization, characterized by the artificial filling of soils, the release of anthropogenic heat, and the complexity of urban geometry. This phenomenon, referred to as urban heat island (UHI), is more prevalent during heat waves, which have increased in frequency and intensity in recent years. In the context of global warming and urban population growth, helping urban planners implement UHI mitigation and adaptation strategies is critical. In practice, the study of UHI requires air temperature information at the street canyon level, which is difficult to obtain. Many urban air temperature simulation models have been proposed (mostly based on physics or statistics), all of which require a variety of input parameters related to urban morphology, land use, material properties, or meteorological conditions. In this paper, we build and evaluate a neural network model based on Urban Weather Generator (UWG) model simulations and data from meteorological stations that simulate air temperature over Toulouse, France, on days favourable to UHI. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=air%20temperature" title="air temperature">air temperature</a>, <a href="https://publications.waset.org/abstracts/search?q=neural%20network%20model" title=" neural network model"> neural network model</a>, <a href="https://publications.waset.org/abstracts/search?q=urban%20heat%20island" title=" urban heat island"> urban heat island</a>, <a href="https://publications.waset.org/abstracts/search?q=urban%20weather%20generator" title=" urban weather generator"> urban weather generator</a> </p> <a href="https://publications.waset.org/abstracts/169977/a-neural-network-model-to-simulate-urban-air-temperatures-in-toulouse-france" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/169977.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">91</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> 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">29</span> Fixed-Frequency Pulse Width Modulation-Based Sliding Mode Controller for Switching Multicellular Converter </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Rihab%20Hamdi">Rihab Hamdi</a>, <a href="https://publications.waset.org/abstracts/search?q=Amel%20Hadri%20Hamida"> Amel Hadri Hamida</a>, <a href="https://publications.waset.org/abstracts/search?q=Ouafae%20%20Bennis"> Ouafae Bennis</a>, <a href="https://publications.waset.org/abstracts/search?q=Fatima%20Babaa"> Fatima Babaa</a>, <a href="https://publications.waset.org/abstracts/search?q=Sakina%20Zerouali"> Sakina Zerouali</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper features a sliding mode controller (SMC) for closed-loop voltage control of DC-DC three-cells buck converter connected in parallel, operating in continuous conduction mode (CCM), based on pulse-width modulation (PWM). To maintain the switching frequency, the approach is to incorporate a pulse-width modulation that utilizes an equivalent control, inferred by applying the SM control method, to produce a control sign to be contrasted and the ﬁxed-frequency within the modulator. Detailed stability and transient performance analysis have been conducted using Lyapunov stability criteria to restrict the switching frequency variation facing wide variations in output load, input changes, and set-point changes. The results obtained confirm the effectiveness of the proposed control scheme in achieving an enhanced output transient performance while faithfully realizing its control objective in the event of abrupt and uncertain parameter variations. Simulations studies in MATLAB/Simulink environment are performed to confirm the idea. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=DC-DC%20converter" title="DC-DC converter">DC-DC converter</a>, <a href="https://publications.waset.org/abstracts/search?q=pulse%20width%20modulation" title=" pulse width modulation"> pulse width modulation</a>, <a href="https://publications.waset.org/abstracts/search?q=power%20electronics" title=" power electronics"> power electronics</a>, <a href="https://publications.waset.org/abstracts/search?q=sliding%20mode%20control" title=" sliding mode control"> sliding mode control</a> </p> <a href="https://publications.waset.org/abstracts/130515/fixed-frequency-pulse-width-modulation-based-sliding-mode-controller-for-switching-multicellular-converter" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/130515.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">147</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> 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">27</span> Chemical Characterization of Octopus Vulgaris Ink and Evaluation of its in-vitro Antioxidant, Antimicrobial, and Anti-Schistosomicidal Activities</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Salwa%20A.%20H.%20Hamdi">Salwa A. H. Hamdi</a>, <a href="https://publications.waset.org/abstracts/search?q=Maha%20A.%20M.%20El-Shazly"> Maha A. M. El-Shazly</a>, <a href="https://publications.waset.org/abstracts/search?q=Mona%20Fathi%20Fol"> Mona Fathi Fol</a>, <a href="https://publications.waset.org/abstracts/search?q=Hanan%20S.%20Mossalem"> Hanan S. Mossalem</a>, <a href="https://publications.waset.org/abstracts/search?q=Mosad%20A.%20Ghareeb"> Mosad A. Ghareeb</a>, <a href="https://publications.waset.org/abstracts/search?q=Amina%20M.%20Ibrahim"> Amina M. Ibrahim</a> </p> <p class="card-text"><strong>Abstract:</strong></p> One of the most distinctive and defining features of cephalopods squid, cuttlefish, and Octopus is their inking behavior. Their ink, which is blackened by melanin but also contains other constituents, has been used by humans in various ways for millennia. The present study aims to investigate the chemical profiling of the Octopus vulgaris ink extract and to evaluate its antioxidant, antimicrobial, and anti-schistosomal activities. The present results showed that GC-MS examination of Octopus vulgaris ink comprises 21 compounds. The main detected compounds are (E)-1, 2, 3, 4-Tetra (4-phenylphenyl)-2-butene-1,4-dione, Lipo-3-episapelin A, and 5,10-Dihexyltetrabenzoporphyrin. Results showed that the octopus ink had antioxidant capacity and the capability to mask DPPH free radicals in comparison with ascorbic acid. Octopus Vulgaris ink extract had inhibitory action against three gram-positive bacteria, Streptococcus faecalis, Staphylococcus aureus, and Bacillus subtilis, and three gram-negative bacteria, Neisseria gonorrhoeae, Escherichia coli, and Pseudomonas aeuroginosa. Additionally, the extracted ink revealed antifungal activity against Aspergillus flavus and yeast as Candida albicans. The obtained data indicated the effectiveness of ink extract in pharmaceutical industries as an antioxidant, antimicrobial and antischistosomicidal <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=antimicrobial" title="antimicrobial">antimicrobial</a>, <a href="https://publications.waset.org/abstracts/search?q=antioxidant" title=" antioxidant"> antioxidant</a>, <a href="https://publications.waset.org/abstracts/search?q=ink" title=" ink"> ink</a>, <a href="https://publications.waset.org/abstracts/search?q=octopus%20vulgaris" title=" octopus vulgaris"> octopus vulgaris</a> </p> <a href="https://publications.waset.org/abstracts/160772/chemical-characterization-of-octopus-vulgaris-ink-and-evaluation-of-its-in-vitro-antioxidant-antimicrobial-and-anti-schistosomicidal-activities" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/160772.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">95</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">26</span> Effect of UV/Ozone Treatment on the Adhesion Strength of Polymeric Systems</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Marouen%20Hamdi">Marouen Hamdi</a>, <a href="https://publications.waset.org/abstracts/search?q=Johannes%20A.%20Poulis"> Johannes A. Poulis</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study investigates the impact of UV/ozone treatment on the adhesion of ethylene propylene diene methylene (EPDM) rubber, polyvinyl chloride (PVC), and acrylonitrile butadiene styrene (ABS) materials. The experimental tests consist of contact angle measurements, standardized adhesion tests, and spectroscopic and microscopic observations. Also, commonly-used surface free energy models were applied to characterize the wettability of the materials. Preliminary results show that the treatment enhances the wettability of the examined polymers. Also, it considerably improved the adhesion strength of PVC and ABS and shifted their failure modes from adhesive to cohesive, without a significant effect on EPDM. Spectroscopic characterization showed significant oxidation-induced changes in the chemical structures of treated PVC and ABS surfaces. Also, new morphological changes (microcracks, micro-holes, and wrinkles) were observed on these two materials using the SEM. These chemical and morphological changes on treated PVC and ABS promote more reactivity and mechanical interlocking with the adhesive, which explains the improvement in their adhesion strength. After characterizing the adhesion strength of the systems, accelerated ageing tests in controlled environment chambers will be conducted to determine the effect of temperature, moisture, and UV radiation on the performance of the polymeric bonded joints. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=accelerated%20tests" title="accelerated tests">accelerated tests</a>, <a href="https://publications.waset.org/abstracts/search?q=adhesion%20strength" title=" adhesion strength"> adhesion strength</a>, <a href="https://publications.waset.org/abstracts/search?q=ageing%20of%20polymers" title=" ageing of polymers"> ageing of polymers</a>, <a href="https://publications.waset.org/abstracts/search?q=UV%2Fozone%20treatment" title=" UV/ozone treatment"> UV/ozone treatment</a> </p> <a href="https://publications.waset.org/abstracts/110983/effect-of-uvozone-treatment-on-the-adhesion-strength-of-polymeric-systems" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/110983.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">148</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> 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> <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=Hamdi%20Belfeki&page=2">2</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=Hamdi%20Belfeki&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 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" 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