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Hamitouche</title> <meta name="description" content="Search results for: Yasmina Hamitouche"> <meta name="keywords" content="Yasmina Hamitouche"> <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="Yasmina Hamitouche"> <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> 23</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: Yasmina Hamitouche</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">23</span> Erosion Influencing Factors Analysis: Case of Isser Watershed (North-West Algeria)</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Chahrazed%20Salhi">Chahrazed Salhi</a>, <a href="https://publications.waset.org/abstracts/search?q=Ayoub%20Zeroual"> Ayoub Zeroual</a>, <a href="https://publications.waset.org/abstracts/search?q=Yasmina%20Hamitouche"> Yasmina Hamitouche</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Soil water erosion poses a significant threat to the watersheds in Algeria today. The degradation of storage capacity in large dams over the past two decades, primarily due to erosion, necessitates a comprehensive understanding of the factors that contribute to soil erosion. The Isser watershed, located in the Northwestern region of Algeria, faces additional challenges such as recurrent droughts and the presence of delicate marl and clay outcrops, which amplify its susceptibility to water erosion. This study aims to employ advanced techniques such as Geographic Information Systems (GIS) and Remote Sensing (RS), in conjunction with the Canonical Correlation Analysis (CCA) method and Soil Water Assessment Tool (SWAT) model, to predict specific erosion patterns and analyze the key factors influencing erosion in the Isser basin. To accomplish this, an array of data sources including rainfall, climatic, hydrometric, land use, soil, digital elevation, and satellite data were utilized. The application of the SWAT model to the Isser basin yielded an average annual soil loss of approximately 16 t/ha/year. Particularly high erosion rates, exceeding 12 T/ha/year, were observed in the central and southern parts of the basin, encompassing 41% of the total basin area. Through Canonical Correlation Analysis, it was determined that vegetation cover and topography exerted the most substantial influence on erosion. Consequently, the study identified significant and spatially heterogeneous erosion throughout the study area. The impact of land topography on soil loss was found to be directly proportional, while vegetation cover exhibited an inverse proportional relationship. Modeling specific erosion for the Ladrat dam sub-basin estimated a rate of around 39 T/ha/year, thus accounting for the recorded capacity loss of 17.80% compared to the bathymetric survey conducted in 2019. The findings of this research provide valuable decision-support tools for soil conservation managers, empowering them to make informed decisions regarding soil conservation measures. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Isser%20watershed" title="Isser watershed">Isser watershed</a>, <a href="https://publications.waset.org/abstracts/search?q=RS" title=" RS"> RS</a>, <a href="https://publications.waset.org/abstracts/search?q=CCA" title=" CCA"> CCA</a>, <a href="https://publications.waset.org/abstracts/search?q=SWAT" title=" SWAT"> SWAT</a>, <a href="https://publications.waset.org/abstracts/search?q=vegetation%20cover" title=" vegetation cover"> vegetation cover</a>, <a href="https://publications.waset.org/abstracts/search?q=topography" title=" topography"> topography</a> </p> <a href="https://publications.waset.org/abstracts/173177/erosion-influencing-factors-analysis-case-of-isser-watershed-north-west-algeria" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/173177.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">71</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">22</span> Nonlinear Analysis of a Building Surmounted by a RC Water Tank under Hydrodynamic Load</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hocine%20Hammoum">Hocine Hammoum</a>, <a href="https://publications.waset.org/abstracts/search?q=Karima%20Bouzelha"> Karima Bouzelha</a>, <a href="https://publications.waset.org/abstracts/search?q=Lounis%20Ziani"> Lounis Ziani</a>, <a href="https://publications.waset.org/abstracts/search?q=Lounis%20Hamitouche"> Lounis Hamitouche</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, we study a complex structure which is an apartment building surmounted by a reinforced concrete water tank. The tank located on the top floor of the building is a container with capacity of 1000 m<sup>3</sup>. The building is complex in its design, its calculation and by its behavior under earthquake effect. This structure located in Algiers and aged of 53 years has been subjected to several earthquakes, but the earthquake of May 21<sup>st</sup>, 2003 with a magnitude of 6.7 on the Richter scale that struck Boumerdes region at 40 Kms East of Algiers was fatal for it. It was downgraded after an investigation study because the central core sustained serious damage. In this paper, to estimate the degree of its damages, the seismic performance of the structure will be evaluated taking into account the hydrodynamic effect, using a static equivalent nonlinear analysis called pushover. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=performance%20analysis" title="performance analysis">performance analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=building" title=" building"> building</a>, <a href="https://publications.waset.org/abstracts/search?q=reinforced%20concrete%20tank" title=" reinforced concrete tank"> reinforced concrete tank</a>, <a href="https://publications.waset.org/abstracts/search?q=seismic%20analysis" title=" seismic analysis"> seismic analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=nonlinear%20analysis" title=" nonlinear analysis"> nonlinear analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrodynamic" title=" hydrodynamic"> hydrodynamic</a>, <a href="https://publications.waset.org/abstracts/search?q=pushover" title=" pushover"> pushover</a> </p> <a href="https://publications.waset.org/abstracts/45967/nonlinear-analysis-of-a-building-surmounted-by-a-rc-water-tank-under-hydrodynamic-load" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/45967.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">421</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">21</span> Stimuli Responsives of Crosslinked Poly on 2-HydroxyEthyl MethAcrylate – Optimization of Parameters by Experimental Design</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Tewfik%20Bouchaour">Tewfik Bouchaour</a>, <a href="https://publications.waset.org/abstracts/search?q=Salah%20Hamri"> Salah Hamri</a>, <a href="https://publications.waset.org/abstracts/search?q=Yasmina%20Houda%20Bendahma"> Yasmina Houda Bendahma</a>, <a href="https://publications.waset.org/abstracts/search?q=Ulrich%20Maschke"> Ulrich Maschke</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Stimuli-responsive materials based on UV crosslinked acrylic polymer networks are fabricated. A various kinds of polymeric systems, hydrophilic polymers based on 2-Hydroxyethyl methacrylate have been widely studied because of their ability to simulate biological tissues, which leads to many applications. The acrylic polymer network PHEMA developed by UV photopolymerization has been used for dye retention. For these so-called smart materials, the properties change in response to an external stimulus. In this contribution, we report the influence of some parameters (initial composition, temperature, and nature of components) in the properties of final materials. Optimization of different parameters is examined by experimental design. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=UV%20photo-polymerization" title="UV photo-polymerization">UV photo-polymerization</a>, <a href="https://publications.waset.org/abstracts/search?q=PHEMA" title=" PHEMA"> PHEMA</a>, <a href="https://publications.waset.org/abstracts/search?q=external%20stimulus" title=" external stimulus"> external stimulus</a>, <a href="https://publications.waset.org/abstracts/search?q=optimization" title=" optimization"> optimization</a> </p> <a href="https://publications.waset.org/abstracts/46734/stimuli-responsives-of-crosslinked-poly-on-2-hydroxyethyl-methacrylate-optimization-of-parameters-by-experimental-design" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/46734.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">255</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">20</span> Polyphenols Content and Antioxidant Activity of Extracts from Peganum harmala Seeds</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Rachid%20Kacem">Rachid Kacem</a>, <a href="https://publications.waset.org/abstracts/search?q=Sara%20Talbi"> Sara Talbi</a>, <a href="https://publications.waset.org/abstracts/search?q=Yasmina%20Hemissi"> Yasmina Hemissi</a>, <a href="https://publications.waset.org/abstracts/search?q=Sofia%20%20Bouguattoucha"> Sofia Bouguattoucha</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The aim of the present work is the evaluation of the antioxidant activity of the Peganum harmala (P. harmala) seeds extracts. The antioxidant activity was evaluated by applying two methods, the method of ß-carotene bleaching and DPPH (2, 2-Diphenyl-1-Picryl-Hydrazyl). Using Folin-Ciocalteu assay, these results revealed that the concentration of polyphenols in EthOH E. (122.28 ± 2.24 µg GAE/mg extract) is the highest. The antiradical activity of the P. harmala seeds extracts on DPPH was found to be dose dependent with polyphenols concentration. The E. EthOH extract showed the highest antioxidant activity (IC = 252.10 ± 11.18 μg /ml). The test of β-carotene bleaching indicates that the E. EthOH of P. harmala showed the highest percentage of the antioxidant activity (49.88 %). <p class="card-text"><strong>Keywords:</strong> <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=Peganum%20harmala" title=" Peganum harmala"> Peganum harmala</a>, <a href="https://publications.waset.org/abstracts/search?q=polyphenols" title=" polyphenols"> polyphenols</a>, <a href="https://publications.waset.org/abstracts/search?q=flavonoids" title=" flavonoids "> flavonoids </a> </p> <a href="https://publications.waset.org/abstracts/32852/polyphenols-content-and-antioxidant-activity-of-extracts-from-peganum-harmala-seeds" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/32852.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">506</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">19</span> Quaternary Ammonium Salts Based Algerian Petroleum Products: Synthesis and Characterization</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Houria%20Hamitouche">Houria Hamitouche</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdellah%20Khelifa"> Abdellah Khelifa</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Quaternary ammonium salts (QACs) are the most common cationic surfactants of natural or synthetic origin usually. They possess one or more hydrophobic hydrocarbon chains and hydrophilic cationic group. In fact, the hydrophobic groups are derived from three main sources: petrochemicals, vegetable oils, and animal fats. These QACs have attracted the attention of chemists for a long time, due to their general simple synthesis and their broad application in several fields. They are important as ingredients of cosmetic products and are also used as corrosion inhibitors, in emulsion polymerization and textile processing. Within biological applications, QACs show a good antimicrobial activity and can be used as medicines, gene delivery agents or in DNA extraction methods. The 2004 worldwide annual consumption of QACs was reported as 500,000 tons. The petroleum product is considered a true reservoir of a variety of chemical species, which can be used in the synthesis of quaternary ammonium salts. The purpose of the present contribution is to synthesize the quaternary ammonium salts by Menschutkin reaction, via chloromethylation/quaternization sequences, from Algerian petroleum products namely: reformate, light naphtha and kerosene and characterize. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=quaternary%20ammonium%20salts" title="quaternary ammonium salts">quaternary ammonium salts</a>, <a href="https://publications.waset.org/abstracts/search?q=reformate" title=" reformate"> reformate</a>, <a href="https://publications.waset.org/abstracts/search?q=light%20naphtha" title=" light naphtha"> light naphtha</a>, <a href="https://publications.waset.org/abstracts/search?q=kerosene" title=" kerosene "> kerosene </a> </p> <a href="https://publications.waset.org/abstracts/32772/quaternary-ammonium-salts-based-algerian-petroleum-products-synthesis-and-characterization" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/32772.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">335</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">18</span> Micro-Electrical Discharge Machining (µEDM): Effect of the Electrochemical Etching Parameters on the Fabrication of Cylindrical Tungsten Micro-Tools</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Asmae%20Tafraouti">Asmae Tafraouti</a>, <a href="https://publications.waset.org/abstracts/search?q=Yasmina%20Layouni"> Yasmina Layouni</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The fabrication of cylindrical Tungsten micro-tools with a high aspect ratio is a real challenge because of several constraints that come into during their manufacture. In this paper, we will describe the process used to fabricate these micro-tools. It consists of using electrochemical etching. We will also present the optimal protocol that makes it possible to fabricate micro-tools with a high aspect ratio in a reproducible way. Next, we will show the limit of the experimental parameters chosen to manufacture micro-tools from a wire with an initial diameter of Φ_0=250µm. The protocol used allows obtaining an average diameter of Φ=88µm ±1 µm over a length of L=3.5mm. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=drop-off%20effect" title="drop-off effect">drop-off effect</a>, <a href="https://publications.waset.org/abstracts/search?q=electrochemical%20etching" title=" electrochemical etching"> electrochemical etching</a>, <a href="https://publications.waset.org/abstracts/search?q=micro-electrical%20discharge%20machining" title=" micro-electrical discharge machining"> micro-electrical discharge machining</a>, <a href="https://publications.waset.org/abstracts/search?q=tungsten%20micro-tools" title=" tungsten micro-tools"> tungsten micro-tools</a> </p> <a href="https://publications.waset.org/abstracts/140730/micro-electrical-discharge-machining-edm-effect-of-the-electrochemical-etching-parameters-on-the-fabrication-of-cylindrical-tungsten-micro-tools" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/140730.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">189</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">17</span> New Methodology for Monitoring Alcoholic Fermentation Processes Using Refractometry</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Boukhiar%20Aissa">Boukhiar Aissa</a>, <a href="https://publications.waset.org/abstracts/search?q=Iguergaziz%20Nadia"> Iguergaziz Nadia</a>, <a href="https://publications.waset.org/abstracts/search?q=Halladj%20Fatima"> Halladj Fatima</a>, <a href="https://publications.waset.org/abstracts/search?q=Lamrani%20Yasmina"> Lamrani Yasmina</a>, <a href="https://publications.waset.org/abstracts/search?q=Benamara%20Salem"> Benamara Salem</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Determining the alcohol content in alcoholic fermentation bioprocess has a great importance. In fact, it is a key indicator for monitoring this fermentation bioprocess. Several methodologies (chemical, spectrophotometric, chromatographic...) are used to the determination of this parameter. However, these techniques are very long and require: rigorous preparations, sometimes dangerous chemical reagents, and/or expensive equipment. In the present study, the date juice is used as a substrate of alcoholic fermentation. The extracted juice undergoes an alcoholic fermentation by Saccharomyces cerevisiae. The study of the possible use of refractometry as a sole means for the in situ control of this process revealed a good correlation (R2 = 0.98) between initial and final ° Brix: ° Brix f = 0.377× ° Brixi. In addition, we verified the relationship between the variation in final and initial ° Brix (Δ ° Brix) and alcoholic rate produced (A exp): CΔ° Brix / A exp = 1.1. This allows the tracing of abacus isoresponses that permit to determine the alcoholic and residual sugar rates with a mean relative error (MRE) of 5.35%. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=refractometry" title="refractometry">refractometry</a>, <a href="https://publications.waset.org/abstracts/search?q=alcohol" title=" alcohol"> alcohol</a>, <a href="https://publications.waset.org/abstracts/search?q=residual%20sugar" title=" residual sugar"> residual sugar</a>, <a href="https://publications.waset.org/abstracts/search?q=fermentation" title=" fermentation"> fermentation</a>, <a href="https://publications.waset.org/abstracts/search?q=brix" title=" brix"> brix</a>, <a href="https://publications.waset.org/abstracts/search?q=date" title=" date"> date</a>, <a href="https://publications.waset.org/abstracts/search?q=juice" title=" juice "> juice </a> </p> <a href="https://publications.waset.org/abstracts/3201/new-methodology-for-monitoring-alcoholic-fermentation-processes-using-refractometry" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/3201.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">16</span> Application of Refractometric Methodology for Simultaneous Determination of Alcohol and Residual Sugar Concentrations during Alcoholic Fermentation Bioprocess of Date Juice</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Boukhiar%20Aissa">Boukhiar Aissa</a>, <a href="https://publications.waset.org/abstracts/search?q=Halladj%20Fatima"> Halladj Fatima</a>, <a href="https://publications.waset.org/abstracts/search?q=Iguergaziz%20Nadia"> Iguergaziz Nadia</a>, <a href="https://publications.waset.org/abstracts/search?q=Lamrani%20yasmina"> Lamrani yasmina</a>, <a href="https://publications.waset.org/abstracts/search?q=Benamara%20Salem"> Benamara Salem</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Determining the alcohol content in alcoholic fermentation bioprocess is of great importance. In fact, it is a key indicator for monitoring this bioprocess. Several methodologies (chemical, spectrophotometric, chromatographic) are used to the determination of this parameter. However, these techniques are very long and they require: rigorous preparations, sometimes dangerous chemical reagents and/or expensive equipment. In the present study, the date juice is used as the substrate of alcoholic fermentation. The extracted juice undergoes an alcoholic fermentation by Saccharomyces cerevisiae. The study of the possible use of refractometry as a sole means for the in situ control of alcoholic fermentation revealed a good correlation (R2=0.98) between initial and final °Brix: °Brixf=0.377×°Brixi. In addition, the relationship between Δ°Brix and alcoholic content of the final product (A,%) has been determined: Δ°Brix/A=1.1. The obtained results allowed us to establish iso-responses abacus, which can be used for the determination of alcohol and residual sugar content, with a mean relative error (MRE) of 5.35%. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=alcoholic%20fermentation" title="alcoholic fermentation">alcoholic fermentation</a>, <a href="https://publications.waset.org/abstracts/search?q=date%20juice" title=" date juice"> date juice</a>, <a href="https://publications.waset.org/abstracts/search?q=refractometry" title=" refractometry"> refractometry</a>, <a href="https://publications.waset.org/abstracts/search?q=residual%20sugar" title=" residual sugar"> residual sugar</a> </p> <a href="https://publications.waset.org/abstracts/2808/application-of-refractometric-methodology-for-simultaneous-determination-of-alcohol-and-residual-sugar-concentrations-during-alcoholic-fermentation-bioprocess-of-date-juice" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/2808.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">341</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">15</span> Inventory of Aromatic and Medicinal Plants Used in Natural Cosmetics in Western Algeria</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Faiza%20Chaib">Faiza Chaib</a>, <a href="https://publications.waset.org/abstracts/search?q=Yasmina-Nadia%20Bendahmane"> Yasmina-Nadia Bendahmane</a>, <a href="https://publications.waset.org/abstracts/search?q=Fatima%20Zohra%20Ghanemi"> Fatima Zohra Ghanemi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In order to know the traditional use of aromatic and medicinal plants in natural cosmetics, we carried out an ethnobotanical study using an online quiz among the Algerian population residing mainly in western Algeria (Oran, Tlemcen, and Mostaganem). Our study identified 37 plant species used as cosmetic plants, divided into 9 botanical families. The families mainly used and the richest in species are the lamiaceae, the apiecea, and the rutaceae. Our study states that the 5 species with the highest frequency of use and highest citation value are lemon, chamomile, turmeric, garlic, and lavender. Lemon takes first place in the order of frequency. The plants listed have been listed in tables grouping the identification of plants by their scientific and vernacular names, frequency of use, parts used, parts of the body concerned, desired action, as well as the main traditional recipes. This study allowed us to highlight the importance of aromatic plants and to appreciate their traditional practices in natural cosmetics. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=aromatic%20plants" title="aromatic plants">aromatic plants</a>, <a href="https://publications.waset.org/abstracts/search?q=ethnobotanical%20survey" title=" ethnobotanical survey"> ethnobotanical survey</a>, <a href="https://publications.waset.org/abstracts/search?q=traditional%20use" title=" traditional use"> traditional use</a>, <a href="https://publications.waset.org/abstracts/search?q=natural%20cosmetics" title=" natural cosmetics"> natural cosmetics</a>, <a href="https://publications.waset.org/abstracts/search?q=questionnaire" title=" questionnaire"> questionnaire</a>, <a href="https://publications.waset.org/abstracts/search?q=western%20Algeria" title=" western Algeria"> western Algeria</a> </p> <a href="https://publications.waset.org/abstracts/157765/inventory-of-aromatic-and-medicinal-plants-used-in-natural-cosmetics-in-western-algeria" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/157765.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">118</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">14</span> Study and Simulation of the Thrust Vectoring in Supersonic Nozzles</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Kbab%20%20H">Kbab H</a>, <a href="https://publications.waset.org/abstracts/search?q=Hamitouche%20%20T"> Hamitouche T</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In recent years, significant progress has been accomplished in the field of aerospace propulsion and propulsion systems. These developments are associated with efforts to enhance the accuracy of the analysis of aerothermodynamic phenomena in the engine. This applies in particular to the flow in the nozzles used. One of the most remarkable processes in this field is thrust vectoring by means of devices able to orientate the thrust vector and control the deflection of the exit jet in the engine nozzle. In the study proposed, we are interested in the fluid thrust vectoring using a second injection in the nozzle divergence. This fluid injection causes complex phenomena, such as boundary layer separation, which generates a shock wave in the primary jet upstream of the fluid interacting zone (primary jet - secondary jet). This will cause the deviation of the main flow, and therefore of the thrust vector with reference to the axis nozzle. In the modeling of the fluidic thrust vector, various parameters can be used. The Mach number of the primary jet and the injected fluid, the total pressures ratio, the injection rate, the thickness of the upstream boundary layer, the injector position in the divergent part, and the nozzle geometry are decisive factors in this type of phenomenon. The complexity of the latter challenges researchers to understand the physical phenomena of the turbulent boundary layer encountered in supersonic nozzles, as well as the calculation of its thickness and the friction forces induced on the walls. The present study aims to numerically simulate the thrust vectoring by secondary injection using the ANSYS-FLUENT, then to analyze and validate the results and the performances obtained (angle of deflection, efficiency...), which will then be compared with those obtained by other authors. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=CD%20Nozzle" title="CD Nozzle">CD Nozzle</a>, <a href="https://publications.waset.org/abstracts/search?q=TVC" title=" TVC"> TVC</a>, <a href="https://publications.waset.org/abstracts/search?q=SVC" title=" SVC"> SVC</a>, <a href="https://publications.waset.org/abstracts/search?q=NPR" title=" NPR"> NPR</a>, <a href="https://publications.waset.org/abstracts/search?q=CFD" title=" CFD"> CFD</a>, <a href="https://publications.waset.org/abstracts/search?q=NPR" title=" NPR"> NPR</a>, <a href="https://publications.waset.org/abstracts/search?q=SPR" title=" SPR"> SPR</a> </p> <a href="https://publications.waset.org/abstracts/133150/study-and-simulation-of-the-thrust-vectoring-in-supersonic-nozzles" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/133150.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">133</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">13</span> Dye Retention by a Photochemicaly Crosslinked Poly(2-Hydroxy-Ethyl-Meth-Acrylic) Network in Water</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yasmina%20Houda%20Bendahma">Yasmina Houda Bendahma</a>, <a href="https://publications.waset.org/abstracts/search?q=Tewfik%20Bouchaour"> Tewfik Bouchaour</a>, <a href="https://publications.waset.org/abstracts/search?q=Meriem%20Merad"> Meriem Merad</a>, <a href="https://publications.waset.org/abstracts/search?q=Ulrich%20Maschke"> Ulrich Maschke</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The purpose of this work is to study retention of dye dissolved in distilled water, by an hydrophilic acrylic polymer network. The polymer network considered is Poly (2-hydroxyethyl methacrylate) (PHEMA): it is prepared by photo-polymerization under UV irradiation in the presence of a monomer (HEMA), initiator and an agent cross-linker. PHEMA polymer network obtained can be used in the retention of dye molecules present in the wastewater. The results obtained are interesting in the study of the kinetics of swelling and de-swelling of cross linked polymer networks PHEMA in colored aqueous solutions. The dyes used for retention by the PHEMA networks are eosin Y and Malachite Green, dissolved in distilled water. Theoretical conformational study by a simplified molecular model of system cross linked PHEMA / dye (eosin Y and Malachite Green), is used to simulate the retention phenomenon (or Docking) dye molecules in cavities in nano-domains included in the PHEMA polymer network. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=dye%20retention" title="dye retention">dye retention</a>, <a href="https://publications.waset.org/abstracts/search?q=molecular%20modeling" title=" molecular modeling"> molecular modeling</a>, <a href="https://publications.waset.org/abstracts/search?q=photochemically%20crosslinked%20polymer%20network" title=" photochemically crosslinked polymer network"> photochemically crosslinked polymer network</a>, <a href="https://publications.waset.org/abstracts/search?q=swelling%20deswelling" title=" swelling deswelling"> swelling deswelling</a>, <a href="https://publications.waset.org/abstracts/search?q=PHEMA" title=" PHEMA"> PHEMA</a>, <a href="https://publications.waset.org/abstracts/search?q=HEMA" title=" HEMA"> HEMA</a> </p> <a href="https://publications.waset.org/abstracts/33085/dye-retention-by-a-photochemicaly-crosslinked-poly2-hydroxy-ethyl-meth-acrylic-network-in-water" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/33085.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">12</span> Urban Vitality: Methods for Measuring Vitality in Egypt's Commercial Streets</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Alaa%20Eldien%20Sarhaan">Alaa Eldien Sarhaan</a>, <a href="https://publications.waset.org/abstracts/search?q=Rania%20A.%20Galil"> Rania A. Galil</a>, <a href="https://publications.waset.org/abstracts/search?q=Yasmina%20Youssef"> Yasmina Youssef</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Vital streets transfer a totally different message from the lifeless streets; vitality is considered as the mobility dynamism for the city’s streets. The quality of a street is integral to the vitality. However, most efforts have focused on the requirements of cars resulting in the loss many qualities. A successful street is related to the needs and expectations of pedestrians. The amount of activity held in a place is one of the measures of vitality; hence the meaning of a vital street may be the result of a number of people engaged in various activities meeting their needs and expectations. Consequently, it varies from one city to another. This research focuses on vitality in commercial streets. It studies commercial streets in the Egyptian context, which have developed into a chaotic environment due to inefficiency and high-density activities. The first part identifies the meaning of vitality in the frame of its physical, social and economic dimensions, then determines the methods used in measuring vitality across commercial streets. Secondly, an application on one of the most important commercial streets in Alexandria ‘El-Attareen’ street is chosen as a case study to measure its vitality. The study contributes to a greater understanding of how theories on vital urban life contribute to the development of vital commercial streets in the Egyptian and similar contexts. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=footfall%20measurement" title="footfall measurement">footfall measurement</a>, <a href="https://publications.waset.org/abstracts/search?q=vitality" title=" vitality"> vitality</a>, <a href="https://publications.waset.org/abstracts/search?q=urban%20commercial%20streets" title=" urban commercial streets"> urban commercial streets</a>, <a href="https://publications.waset.org/abstracts/search?q=yield%20factor" title=" yield factor"> yield factor</a> </p> <a href="https://publications.waset.org/abstracts/55319/urban-vitality-methods-for-measuring-vitality-in-egypts-commercial-streets" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/55319.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">262</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">11</span> Modeling the Elastic Mean Free Path of Electron Collision with Pyrimidine: The Screen Corrected Additivity Rule Method</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Aouina%20Nabila%20Yasmina">Aouina Nabila Yasmina</a>, <a href="https://publications.waset.org/abstracts/search?q=Chaoui%20Zine%20El%20Abiddine"> Chaoui Zine El Abiddine</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study presents a comprehensive investigation into the elastic mean free path (EMFP) of electrons colliding with pyrimidine, a precursor to the pyrimidine bases in DNA, employing the Screen Corrected Additivity Rule (SCAR) method. The SCAR method is introduced as a novel approach that combines classical and quantum mechanical principles to elucidate the interaction of electrons with pyrimidine. One of the most fundamental properties characterizing the propagation of a particle in the nuclear medium is its mean free path. Knowledge of the elastic mean free path is essential to accurately predict the effects of radiation on biological matter, as it contributes to the distances between collisions. Additionally, the mean free path plays a role in the interpretation of almost all experiments in which an excited electron moves through a solid. Pyrimidine, the precursor of the pyrimidine bases of DNA, has interesting physicochemical properties, which make it an interesting molecule to study from a fundamental point of view. These include a relatively large dipole polarizability and dipole moment and an electronic charge cloud with a significant spatial extension, which justifies its choice in this present study. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=elastic%20mean%20free%20path" title="elastic mean free path">elastic mean free path</a>, <a href="https://publications.waset.org/abstracts/search?q=elastic%20collision" title=" elastic collision"> elastic collision</a>, <a href="https://publications.waset.org/abstracts/search?q=pyrimidine" title=" pyrimidine"> pyrimidine</a>, <a href="https://publications.waset.org/abstracts/search?q=SCAR" title=" SCAR"> SCAR</a> </p> <a href="https://publications.waset.org/abstracts/179786/modeling-the-elastic-mean-free-path-of-electron-collision-with-pyrimidine-the-screen-corrected-additivity-rule-method" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/179786.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">64</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">10</span> Experimental Parameters’ Effects on the Electrical Discharge Machining Performances</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Asmae%20Tafraouti">Asmae Tafraouti</a>, <a href="https://publications.waset.org/abstracts/search?q=Yasmina%20Layouni"> Yasmina Layouni</a>, <a href="https://publications.waset.org/abstracts/search?q=Pascal%20Kleimann"> Pascal Kleimann</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The growing market for Microsystems (MST) and Micro-Electromechanical Systems (MEMS) is driving the research for alternative manufacturing techniques to microelectronics-based technologies, which are generally expensive and time-consuming. Hot-embossing and micro-injection modeling of thermoplastics appear to be industrially viable processes. However, both require the use of master models, usually made in hard materials such as steel. These master models cannot be fabricated using standard microelectronics processes. Thus, other micromachining processes are used, such as laser machining or micro-electrical discharge machining (µEDM). In this work, µEDM has been used. The principle of µEDM is based on the use of a thin cylindrical micro-tool that erodes the workpiece surface. The two electrodes are immersed in a dielectric with a distance of a few micrometers (gap). When an electrical voltage is applied between the two electrodes, electrical discharges are generated, which cause material machining. In order to produce master models with high resolution and smooth surfaces, it is necessary to well control the discharge mechanism. However, several problems are encountered, such as a random electrical discharge process, the fluctuation of the discharge energy, the electrodes' polarity inversion, and the wear of the micro-tool. The effect of different parameters, such as the applied voltage, the working capacitor, the micro-tool diameter, and the initial gap, has been studied. This analysis helps to improve the machining performances, such as the workpiece surface condition and the lateral crater's gap. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=craters" title="craters">craters</a>, <a href="https://publications.waset.org/abstracts/search?q=electrical%20discharges" title=" electrical discharges"> electrical discharges</a>, <a href="https://publications.waset.org/abstracts/search?q=micro-electrical%20discharge%20machining" title=" micro-electrical discharge machining"> micro-electrical discharge machining</a>, <a href="https://publications.waset.org/abstracts/search?q=microsystems" title=" microsystems"> microsystems</a> </p> <a href="https://publications.waset.org/abstracts/146294/experimental-parameters-effects-on-the-electrical-discharge-machining-performances" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/146294.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">74</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> Experimental Parameters’ Effects on the Electrical Discharge Machining Performances (µEDM)</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Asmae%20Tafraouti">Asmae Tafraouti</a>, <a href="https://publications.waset.org/abstracts/search?q=Yasmina%20Layouni"> Yasmina Layouni</a>, <a href="https://publications.waset.org/abstracts/search?q=Pascal%20Kleimann"> Pascal Kleimann</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The growing market for Microsystems (MST) and Micro-Electromechanical Systems (MEMS) is driving the research for alternative manufacturing techniques to microelectronics-based technologies, which are generally expensive and time-consuming. Hot-embossing and micro-injection modeling of thermoplastics appear to be industrially viable processes. However, both require the use of master models, usually made in hard materials such as steel. These master models cannot be fabricated using standard microelectronics processes. Thus, other micromachining processes are used, as laser machining or micro-electrical discharge machining (µEDM). In this work, µEDM has been used. The principle of µEDM is based on the use of a thin cylindrical micro-tool that erodes the workpiece surface. The two electrodes are immersed in a dielectric with a distance of a few micrometers (gap). When an electrical voltage is applied between the two electrodes, electrical discharges are generated, which cause material machining. In order to produce master models with high resolution and smooth surfaces, it is necessary to well control the discharge mechanism. However, several problems are encountered, such as a random electrical discharge process, the fluctuation of the discharge energy, the electrodes' polarity inversion, and the wear of the micro-tool. The effect of different parameters, such as the applied voltage, the working capacitor, the micro-tool diameter, the initial gap, has been studied. This analysis helps to improve the machining performances, such: the workpiece surface condition and the lateral crater's gap. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=craters" title="craters">craters</a>, <a href="https://publications.waset.org/abstracts/search?q=electrical%20discharges" title=" electrical discharges"> electrical discharges</a>, <a href="https://publications.waset.org/abstracts/search?q=micro-electrical%20discharge%20machining%20%28%C2%B5EDM%29" title=" micro-electrical discharge machining (µEDM)"> micro-electrical discharge machining (µEDM)</a>, <a href="https://publications.waset.org/abstracts/search?q=microsystems" title=" microsystems"> microsystems</a> </p> <a href="https://publications.waset.org/abstracts/150983/experimental-parameters-effects-on-the-electrical-discharge-machining-performances-edm" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/150983.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">96</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> Elaboration and Characterization of a Composite Based on Plant Sisal Fiber</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Biskri%20Yasmina">Biskri Yasmina</a>, <a href="https://publications.waset.org/abstracts/search?q=Laidi%20Babouri"> Laidi Babouri</a>, <a href="https://publications.waset.org/abstracts/search?q=Dehas%20Ouided"> Dehas Ouided</a>, <a href="https://publications.waset.org/abstracts/search?q=Bougherira%20Nadjiba"> Bougherira Nadjiba</a>, <a href="https://publications.waset.org/abstracts/search?q=Baghloul%20Rahima"> Baghloul Rahima</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Algeria is one of the countries which have extraordinary resources in vegetable fibers (Palmier, Alfa, Cotton, Sisal). Unfortunately, their valorization in the practical fields, among other things, in building materials, is still little exploited. Several works align with the fact that the use of plant fibers in mortar is an advantageous solution, given its abundance and its socio-economic and environmental impact. The idea of introducing plant fiber into the field of Civil Engineering is not new. Based on the work of several researchers in this field, we propose to study the mechanical behavior of mortar based on Sisal fibers. This work consists of the experimental characterization in the fresh state (workability) and in the hardened state (mechanical resistance to compression and traction by three-point bending) on the scale of mortar mortars based on sisal plant fibers. The main objective of this work is the study of the effect of fiber incorporation on mechanical properties (compressive strength and three-point bending strength). In this study, we varied two parameters, such as the length of the fiber (7cm, 10 cm) and the fibers percentage (0.25%, 0.5%, 0.75%, 1%, 1.25% and 1.5%). The results show that there is a slight increase in the compressive strength of the fiber-reinforced mortars compared to the reference mortar (mortar without fibers). With regard to the three-point bending tests, the fiber-reinforced mortars presented higher resistances compared to the reference mortar and this was for the different lengths and different percentages studied. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=mortar" title="mortar">mortar</a>, <a href="https://publications.waset.org/abstracts/search?q=plant%20fiber" title=" plant fiber"> plant fiber</a>, <a href="https://publications.waset.org/abstracts/search?q=experimentation" title=" experimentation"> experimentation</a>, <a href="https://publications.waset.org/abstracts/search?q=mechanical%20characterization" title=" mechanical characterization"> mechanical characterization</a>, <a href="https://publications.waset.org/abstracts/search?q=analysis" title=" analysis"> analysis</a> </p> <a href="https://publications.waset.org/abstracts/166675/elaboration-and-characterization-of-a-composite-based-on-plant-sisal-fiber" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/166675.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">94</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> Interaction of Chemical, Microbiological and Ecological Aspects in the Brown Alga Zonaria Tournefortii</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sonia%20Hamiche">Sonia Hamiche</a>, <a href="https://publications.waset.org/abstracts/search?q=Naima%20Bouzidi"> Naima Bouzidi</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Reda%20Zahi"> Mohamed Reda Zahi</a>, <a href="https://publications.waset.org/abstracts/search?q=Yasmina%20Daghbouche"> Yasmina Daghbouche</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdelmalek%20Badis"> Abdelmalek Badis</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20El%20Hattab"> Mohamed El Hattab</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study was carried out on the brown alga Zonaria tourfortii harvested on the central coast of Algeria. The chemical study enabled the characterization of phenolic compounds, mainly acyl phloroglucinol and chromone metabolites. The study isolated a significant quantity of all-cis-5,8,11,14,17 eicosapentanoic acid (EPA). Based on a literature review, we have proposed a biosynthetic pathway leading from EPA to phenolic metabolites. Bacterial screening from the algal surface led to isolate 30 bacterial strains, including 26 Gram+ containing the Staphylococcus and Bacillus genus, and 4 Gram- containing the Acinetobacter and Enterobacteracea genus. In terms of activity profiles, strain S13 (identified as Bacillus amyloliquefaciens based on 16S rRNA technique) proved highly interesting inhibitory activities against target germs, as well as its production of diffusible and volatile compounds. Bacterial cells from the B. amyloliquefaciens S13 strain were used to recover a volatile fraction. Analysis was carried out by gas chromatography-mass spectrometry. The main volatile compounds identified were: 13-epi-manoyl oxide (29.39%), manool (17.39%), 15,16-dinorlabd-8(20)-en-13-one (13.17%), labda-8(17),13Z-dien-15-ol (9. 51%) and 3-acetoxy-13 epimanoyl oxide (5.26%) belonging to the labdane class of diterpenes, the latter having never been described in the category of microbial volatile organic compounds. Ecological aspects were discussed. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=chemical%20analysis" title="chemical analysis">chemical analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=acylphloroglucinols" title=" acylphloroglucinols"> acylphloroglucinols</a>, <a href="https://publications.waset.org/abstracts/search?q=phenolic%20compounds" title=" phenolic compounds"> phenolic compounds</a>, <a href="https://publications.waset.org/abstracts/search?q=microbial%20volatiles" title=" microbial volatiles"> microbial volatiles</a>, <a href="https://publications.waset.org/abstracts/search?q=Zonaria%20tournefortii" title=" Zonaria tournefortii"> Zonaria tournefortii</a> </p> <a href="https://publications.waset.org/abstracts/185772/interaction-of-chemical-microbiological-and-ecological-aspects-in-the-brown-alga-zonaria-tournefortii" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/185772.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">60</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> In Vitro Evaluation of the Antimitotic and Genotoxic Effect by the Allium cepa L. Test of the Aqueous Extract of Peganum harmala L. Leaves (Laghouat, Algeria)</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ouzid%20Yasmina">Ouzid Yasmina</a>, <a href="https://publications.waset.org/abstracts/search?q=Aiche-Iratni%20Ghenima"> Aiche-Iratni Ghenima</a>, <a href="https://publications.waset.org/abstracts/search?q=Harchaoui%20Lina"> Harchaoui Lina</a>, <a href="https://publications.waset.org/abstracts/search?q=Saadoun%20Noria"> Saadoun Noria</a>, <a href="https://publications.waset.org/abstracts/search?q=Houali%20Karim"> Houali Karim</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Medicinal plants are an important source of bioactive molecules with biological activities such as anticancer, antioxidant, anti-inflammatory, antibacterial, antimitotic.... These molecules include alkaloids, polyphenols and terpenes. The latter can be extracted by different solvents, namely: water, ethanol, methanol, butanol, acetone... This is why it seemed interesting to us to evaluate in vitro the antimitotic and genotoxic effect of these secondary metabolites contained in the aqueous extract of the leaves of Peganum harmala L. by the Allium cepa L. test on meristematic cells by calculating the mitotic parameters (The mitotic index, the aberration index and the limit value of cytotoxicity).A spectrophotometric determination of secondary metabolites, namely alkaloids and flavonoids in the aqueous extract of this essence, was performed. As a result, the alkaloid content is estimated to be 28.42 μg EC/mg extract, and the flavonoid content is 12.52 μg EQ/mg extract. The determination of the mitotic index revealed disturbances in cell division with a highly significant difference between the negative control (distilled water) and the different samples (aqueous extracts, colchicine and quecetin). The exposure of meristematic cells to our samples resulted in a large number of chromosomal, nuclear and cellular aberrations with an aberration index reaching 16.21±1.28% for the 4mg/ml aqueous extract and 11.71±3.32% for the 10mg/ml aqueous extract. The limit value of cytotoxicity revealed that our samples are sublethal on Allium cepa L. meristematic cells. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=allium%20cepa%20l." title="allium cepa l.">allium cepa l.</a>, <a href="https://publications.waset.org/abstracts/search?q=antimitotic%20and%20genotoxic%20effect" title=" antimitotic and genotoxic effect"> antimitotic and genotoxic effect</a>, <a href="https://publications.waset.org/abstracts/search?q=aqueous%20leaf%20extract" title=" aqueous leaf extract"> aqueous leaf extract</a>, <a href="https://publications.waset.org/abstracts/search?q=laghouat%20%28algeria%29" title=" laghouat (algeria)"> laghouat (algeria)</a>, <a href="https://publications.waset.org/abstracts/search?q=peganum%20harmala%20l." title=" peganum harmala l."> peganum harmala l.</a>, <a href="https://publications.waset.org/abstracts/search?q=secondary%20metabolites" title=" secondary metabolites"> secondary metabolites</a> </p> <a href="https://publications.waset.org/abstracts/167156/in-vitro-evaluation-of-the-antimitotic-and-genotoxic-effect-by-the-allium-cepa-l-test-of-the-aqueous-extract-of-peganum-harmala-l-leaves-laghouat-algeria" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/167156.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">94</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> The Impact of Culture in Teaching English, the Case Study of Preparatory School of Sciences and Techniques</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nouzha%20Yasmina%20Soulimane-Benhabib">Nouzha Yasmina Soulimane-Benhabib</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Language is a medium of communication and a means of expression that is why today the learning of foreign languages especially the English language has become a basic necessity for every student who is ambitious. It is known that culture and language are inseparable and complementary, however, in the process of teaching a foreign language, teachers used to focus mainly on preparing adequate syllabi for ESP students, yet, some parameters should be considered. For instance; the culture of the target language may play an important role since students attitudes towards a foreign language enhance their learning or vice versa. The aim of this study is to analyse how culture could influence the teaching of a foreign language, we have taken the example of the English language as it is considered as the second foreign language in Algeria after French. The study is conducted at the Preparatory School of Sciences and Techniques, Tlemcen where twenty-five students participated in this research. The reasons behind learning the English language are various, and since English is the most widely-spoken language in the world, it is the language of research and education and it is used in many other fields, we have to take into consideration one important factor which is the social distance between the culture of the Algerian learner and the culture of the target language, this gap may lead to a culture shock. Two steps are followed in this research: The first one is to collect data from those students who are studying at the Preparatory School under the form of questionnaire and an interview is submitted to six of them in order to reinforce our research and get effective and precise results, and the second step is to analyse these data taking into consideration the diversity of the learners within this institution. The results obtained show that learners’ attitudes towards the English community and culture are mixed and it may influence their curiosity and attention to learn. Despite of big variance between Algerian and European cultures, some of the students focused mainly on the benefits of the English language since they need it in their studies, research and a future carrier, however, the others manifest their reluctance towards this language and this is mainly due to the profound impact of the English culture which is different from the Algerian one. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Algeria" title="Algeria">Algeria</a>, <a href="https://publications.waset.org/abstracts/search?q=culture" title=" culture"> culture</a>, <a href="https://publications.waset.org/abstracts/search?q=English" title=" English"> English</a>, <a href="https://publications.waset.org/abstracts/search?q=impact" title=" impact"> impact</a> </p> <a href="https://publications.waset.org/abstracts/49806/the-impact-of-culture-in-teaching-english-the-case-study-of-preparatory-school-of-sciences-and-techniques" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/49806.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">388</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> Elastic Collisions of Electrons with DNA and Water From 10 eV to 100 KeV: Scar Macro Investigation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Aouina%20Nabila%20Yasmina">Aouina Nabila Yasmina</a>, <a href="https://publications.waset.org/abstracts/search?q=Zine%20El%20Abidine%20Chaoui"> Zine El Abidine Chaoui</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Recently, understanding the interactions of electrons with the DNA molecule and its components has attracted considerable interest because DNA is the main site damaged by ionizing radiation. The interactions of radiation with DNA induce a variety of molecular damage such as single-strand breaks, double-strand breaks, basic damage, cross-links between proteins and DNA, and others, or the formation of free radicals, which, by chemical reactions with DNA, can also lead to breakage of the strand. One factor that can contribute significantly to these processes is the effect of water hydration on the formation and reaction of radiation induced by these radicals in and / or around DNA. B-DNA requires about 30% by weight of water to maintain its native conformation in the crystalline state. The transformation depends on various factors such as sequence, ion composition, concentration and water activity. Partial dehydration converts it to DNA-A. The present study shows the results of theoretical calculations for positrons and electrons elastic scattering with DNA medium and water over a broad energy range from 10 eV to 100 keV. Indeed, electron elastic cross sections and elastic mean free paths are calculated using a corrected form of the independent atom method, taking into account the geometry of the biomolecule (SCAR macro). Moreover, the elastic scattering of electrons and positrons by atoms of the biomolecule was evaluated by means of relativistic (Dirac) partial wave analysis. Our calculated results are compared with theoretical data available in the literature in the absence of experimental data, in particular for positron. As a central result, our electron elastic cross sections are in good agreement with existing theoretical data in the range of 10 eV to 1 keV. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=elastic%20cross%20scrion" title="elastic cross scrion">elastic cross scrion</a>, <a href="https://publications.waset.org/abstracts/search?q=elastic%20mean%20free%20path" title=" elastic mean free path"> elastic mean free path</a>, <a href="https://publications.waset.org/abstracts/search?q=scar%20macro%20method" title=" scar macro method"> scar macro method</a>, <a href="https://publications.waset.org/abstracts/search?q=electron%20collision" title=" electron collision"> electron collision</a> </p> <a href="https://publications.waset.org/abstracts/179787/elastic-collisions-of-electrons-with-dna-and-water-from-10-ev-to-100-kev-scar-macro-investigation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/179787.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">64</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> Improvement of Thermal Comfort Conditions in an Urban Space "Case Study: The Square of Independence, Setif, Algeria"</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ballout%20Amor">Ballout Amor</a>, <a href="https://publications.waset.org/abstracts/search?q=Yasmina%20Bouchahm"> Yasmina Bouchahm</a>, <a href="https://publications.waset.org/abstracts/search?q=Lacheheb%20Dhia%20Eddine%20Zakaria"> Lacheheb Dhia Eddine Zakaria</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Several studies all around the world were conducted on the phenomenon of the urban heat island, and referring to the results obtained, one of the most important factors that influence this phenomenon is the mineralization of the cities which means the reducing of evaporative urban surfaces, replacing vegetation and wetlands with concrete and asphalt. The use of vegetation and water can change the urban environment and improve comfort, thus reduce the heat island. The trees act as a mask to the sun, wind, and sound, and also as a source of humidity which reduces air temperature and surrounding surfaces. Water also acts as a buffer to noise; it is also a source of moisture and regulates temperature not to mention the psychological effect on humans. Our main objective in this paper is to determine the impact of vegetation, ponds and fountains on the urban micro climate in general and on the thermal comfort of people along the Independence square in the Algerian city of Sétif, which is a semi-arid climate, in particularly. In order to reach this objective, a comparative study between different scenarios has been done; the use of the Envi-met program enabled us to model the urban environment of the Independence Square and to study the possibility of improving the conditions of comfort by adding an amount of vegetation and water ponds. After studying the results obtained (temperature, relative humidity, wind speed, PMV and PPD indicators), the efficiency of the additions we've made on the square was confirmed and this is what helped us to confirm our assumptions regarding the terms of comfort in the studied site, and in the end we are trying to develop recommendations and solutions which may contribute to improve the conditions for greater comfort in the Independence square. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=comfort%20in%20outer%20space" title="comfort in outer space">comfort in outer space</a>, <a href="https://publications.waset.org/abstracts/search?q=urban%20environment" title=" urban environment"> urban environment</a>, <a href="https://publications.waset.org/abstracts/search?q=scenarisation" title=" scenarisation"> scenarisation</a>, <a href="https://publications.waset.org/abstracts/search?q=vegetation" title=" vegetation"> vegetation</a>, <a href="https://publications.waset.org/abstracts/search?q=water%20ponds" title=" water ponds"> water ponds</a>, <a href="https://publications.waset.org/abstracts/search?q=public%20square" title=" public square"> public square</a>, <a href="https://publications.waset.org/abstracts/search?q=simulation" title=" simulation"> simulation</a> </p> <a href="https://publications.waset.org/abstracts/18807/improvement-of-thermal-comfort-conditions-in-an-urban-space-case-study-the-square-of-independence-setif-algeria" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/18807.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">454</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> Data Analysis Tool for Predicting Water Scarcity in Industry</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Tassadit%20Issaadi%20Hamitouche">Tassadit Issaadi Hamitouche</a>, <a href="https://publications.waset.org/abstracts/search?q=Nicolas%20Gillard"> Nicolas Gillard</a>, <a href="https://publications.waset.org/abstracts/search?q=Jean%20Petit"> Jean Petit</a>, <a href="https://publications.waset.org/abstracts/search?q=Valerie%20Lavaste"> Valerie Lavaste</a>, <a href="https://publications.waset.org/abstracts/search?q=Celine%20Mayousse"> Celine Mayousse</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Water is a fundamental resource for the industry. It is taken from the environment either from municipal distribution networks or from various natural water sources such as the sea, ocean, rivers, aquifers, etc. Once used, water is discharged into the environment, reprocessed at the plant or treatment plants. These withdrawals and discharges have a direct impact on natural water resources. These impacts can apply to the quantity of water available, the quality of the water used, or to impacts that are more complex to measure and less direct, such as the health of the population downstream from the watercourse, for example. Based on the analysis of data (meteorological, river characteristics, physicochemical substances), we wish to predict water stress episodes and anticipate prefectoral decrees, which can impact the performance of plants and propose improvement solutions, help industrialists in their choice of location for a new plant, visualize possible interactions between companies to optimize exchanges and encourage the pooling of water treatment solutions, and set up circular economies around the issue of water. The development of a system for the collection, processing, and use of data related to water resources requires the functional constraints specific to the latter to be made explicit. Thus the system will have to be able to store a large amount of data from sensors (which is the main type of data in plants and their environment). In addition, manufacturers need to have 'near-real-time' processing of information in order to be able to make the best decisions (to be rapidly notified of an event that would have a significant impact on water resources). Finally, the visualization of data must be adapted to its temporal and geographical dimensions. In this study, we set up an infrastructure centered on the TICK application stack (for Telegraf, InfluxDB, Chronograf, and Kapacitor), which is a set of loosely coupled but tightly integrated open source projects designed to manage huge amounts of time-stamped information. The software architecture is coupled with the cross-industry standard process for data mining (CRISP-DM) data mining methodology. The robust architecture and the methodology used have demonstrated their effectiveness on the study case of learning the level of a river with a 7-day horizon. The management of water and the activities within the plants -which depend on this resource- should be considerably improved thanks, on the one hand, to the learning that allows the anticipation of periods of water stress, and on the other hand, to the information system that is able to warn decision-makers with alerts created from the formalization of prefectoral decrees. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=data%20mining" title="data mining">data mining</a>, <a href="https://publications.waset.org/abstracts/search?q=industry" title=" industry"> industry</a>, <a href="https://publications.waset.org/abstracts/search?q=machine%20Learning" title=" machine Learning"> machine Learning</a>, <a href="https://publications.waset.org/abstracts/search?q=shortage" title=" shortage"> shortage</a>, <a href="https://publications.waset.org/abstracts/search?q=water%20resources" title=" water resources"> water resources</a> </p> <a href="https://publications.waset.org/abstracts/132581/data-analysis-tool-for-predicting-water-scarcity-in-industry" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/132581.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">121</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> Healthy Beverages Made from Grape Juice: Antioxidant, Energetic, and Isotonic Components</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yasmina%20Bendaali">Yasmina Bendaali</a>, <a href="https://publications.waset.org/abstracts/search?q=Cristian%20Vaquero"> Cristian Vaquero</a>, <a href="https://publications.waset.org/abstracts/search?q=Carlos%20Escott"> Carlos Escott</a>, <a href="https://publications.waset.org/abstracts/search?q=Carmen%20Gonz%C3%A1lez"> Carmen González</a>, <a href="https://publications.waset.org/abstracts/search?q=Antonio%20Morata"> Antonio Morata</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Consumer tendencies to healthy eating habits and request for organic beverages led to the production of new drinks from fruit juices as a source of nutrients and bioactive compounds. Grape juice is a rich source of sugars, organic acids, and phenolic compounds, which define its beneficial effect on health and the attractive sensory profile for consumers' choices (color, taste, flavor). Thus, grape juice was used as a source of sugars, avoiding the addition of sweeteners by diluting it with mineral water to obtain the sugar concentration recommended for isotonic drinks (6% to 8%) to provide energy during physical activities. In addition, phenolic compounds of grape juice are associated with many human health benefits, mainly antioxidant activity, which helps to prevent different diseases associated with oxidative stress, including cancers and cardiovascular and neurodegenerative diseases. Furthermore, physical exercise has been shown to increase the production of free radicals and other reactive oxygen species. Thus, athletes need to improve their antioxidant defense systems to prevent oxidative damage. Different studies have demonstrated the positive effect of grape juice consumption during physical activities, which improves antioxidant activity and performance, protects against oxidative damage, and reduces inflammation. Thus, the use of grape juice to develop isotonic drinks can provide isotonic drinks with antioxidant and biological activities in addition to their principal role of rehydration and replacement of minerals and carbohydrates during physical exercises. Moreover, attractive sensory characteristics, mainly color, which is provided by anthocyanin content, have a great contribution to making the drinks more natural and help to dispense the use of synthetic dyes in addition to the health benefits which will be a novel product in the field of healthy beverages responding on the demand of consumers for new, innovative, and healthy products. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=grape%20juice" title="grape juice">grape juice</a>, <a href="https://publications.waset.org/abstracts/search?q=isotonic" title=" isotonic"> isotonic</a>, <a href="https://publications.waset.org/abstracts/search?q=antioxidants" title=" antioxidants"> antioxidants</a>, <a href="https://publications.waset.org/abstracts/search?q=anthocyanins" title=" anthocyanins"> anthocyanins</a>, <a href="https://publications.waset.org/abstracts/search?q=natural" title=" natural"> natural</a>, <a href="https://publications.waset.org/abstracts/search?q=sport" title=" sport"> sport</a> </p> <a href="https://publications.waset.org/abstracts/167783/healthy-beverages-made-from-grape-juice-antioxidant-energetic-and-isotonic-components" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/167783.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">77</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" 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