Amal Brahimi , Amar Laoufi , Sonia Bouchia
كلية الاداب واللغات-جامعة مولود معمري - تيزي وزو · الجزائر
الحبيب بالعربي, بومدين حداد, كريمة دهماني
كلية علوم المادة-جامعة ابن خلدون – تيارت · الجزائر
La bentonite fait partie des phyllosilicates dont la principale composante est la montmorillonite , la modification de l’argile par l’insertion d’espèces chimiques organiques entre les feuillets à suscité l’intérêt de nombreux chercheurs. De nombreux travaux ont été introduits pour obtenir des propriétés voisines de célestes charbons actifs. Le matériau modifié présente des propriétés importantes télescope grande capacité d’échange cationique et une remarquable adsorption.Le but du travail que nous proposons est de vérifier qu’une nouvelle modifiées par des liquides ioniques peut être capable d’adsorber effectivement les polluants toxiques. Ceci consiste à modifier la surface d’argile de liquides ioniques, afin d’évaluer leur potentiel d’applications en adsorption.L’objectif principal de ce travail est de modifier la structure de l’argile par un liquide ionique choisi afin d’espacer le plus possible le volume des feuillets du minéral argileux et lui donner un caractère hydrophobe et francophile.L’analyse portera sur l’effet de certains paramètres à savoir le temps de contact adsorbant/adsorbat, et la concentration initiale du polluant. () Bentonite is one of the silicates layer whose main component is montmorillonite, modification of the clay by the insertion of organic chemical species between the layers to attracted the interest of many researchers. Many works have for neighboring properties than activated carbons. The modified properties such high cation exchange capacity and a .The purpose of the work we propose is to verify that a new class of with ionic liquids may be able to effectively adsorb toxic pollutants. This is to modify the clay surface via ionic liquids. To assess their potential for .The main objective of this work is to modify the clay structure by an liquid to space as much as possible the volume of clay mineral and hydrophobic and .The analysis will focus on the effect of certain parameters like the time of contact the adsorbent / adsorbate, and the initial concentration of the pollua
Nadia RegbI, Zineb Chegma
كلية الآداب واللغات-جامعة غرداية · الجزائر
L'enseignement-apprentissage est un domaine très important, ce que pousse les chercheurs et les spécialistes du domaine à faire leurs possibles pour le rendre efficace et motivé dans le but d'installer des compétences chez les apprenants.Dans notre recherche, nous avons essayé d'étudier l'impact et l'efficacité de l'approche «La pensée design» dans ce domaine afin d'arriver aux résultats visés. La démarche suivie pour réaliser notre enquête est descriptive, expérimentale et analytique. Nous avons réalisé que «La pensée design» a donné ses fruits dans d'autres domaines, d'autres pays et même pendant sa pratique pendant notre enquête donc elle n'a pas de limites, selon la déclaration des enseignants, la satisfaction des élèves et leurs résultats obtenus.Les enseignants ont demandé de se former pour pratiquer cette approche dans nos écoles.
Inssaf Akoch , عبدالكريم شحو
كلية الطب والصيدلة -جامعة سيدي محمد بن عبدالله - فاس · المغرب
لمياء امرابطي, هشام قشنى
كلية الطب والصيدلة -جامعة سيدي محمد بن عبدالله - فاس · المغرب
أسماء يسعد, عبد الجليل لغرام, لامية مقرع
كلية الأداب واللغات-جامعة العربي بن مهيدي - أم البواقي · الجزائر
تناولت هذه الدراسة موضوع الآليات الحجاجية والبلاغية في رباعيات عمر الخيام، حيث بدأت بمقدمة ويليها تمهيد. الذي قدمنا فيه حوصلة عن الفصل الأول بداية بمحاولة ضبط مفهوم التداولية، باعتبارها حقل يتداخل مع حقول معرفية أخرى، كونها تهدف إلى العناية بشروط التبليغ والتواصل وخاصة المخاطب في العملية التخاطبية، وتحدثنا عن علاقة الخطاب بالنص.
WISSAM TANIOS EL BEAINO, ZAHER DAWY
كلية مارون سمعان للهندسة والعمارة-الجامعة الأمريكية في بيروت · لبنان
The recent trend towards energy-efficient and environment-aware network operations has mandated the development of novel green network planning paradigms. Energy is becoming a main concern nowadays due to the increasing demands on natural energy resources. Base stations (BS) consume up to 80percent of the total energy expenditure in a cellular network. Previous works focused on techniques such as discontinuous BS transmission, BS sleep modes, and BS on-off switching after complete network deployment. In this thesis, we propose and evaluate a proactive green radio network planning approach that jointly optimizes base station locations and generates the BS on-off switching patterns based on the changing traffic conditions in the network. In this thesis, we formulate the radio network planning problem with green considerations as an integer optimization problem. The formulated problem is solved using heuristic optimization for large size networks whereas optimal solutions are obtained for small size networks. Planning is performed based on a proactive approach starting with the lowest traffic demand until reaching the highest traffic demand indicating the worst case scenario in the network. The proposed approach is compared to the reactive approach where operators try to adapt their network to traffic changes after network deployment. Performance results are presented for various case studies and evaluated taking into account practical network planning considerations. Results demonstrate considerable energy savings through dynamic adaptation of the number of simultaneously active BSs.
بوجمعة العماري, منيرة رشدي
كلية العلوم الاجتماعية-جامعة عبد الحميد بن باديس مستغانم · الجزائر
Ahmed Yousef, Ahsan Qurashi, Aya Alsadik, Syed Salman Ashraf
جامعة خليفة · الامارات
In recent years, concerns are being raised about the potential harmful effects of emerging pollutants (EPs) on human and aquatic lives. Extensive research is being conducted on developing treatment approaches to target this new class of toxic pollutants. Studies focused on biological (enzyme-based) methods have shown a potential as greener and possibly more economical alternatives to other treatment approaches, such as chemical methods. Peroxidase enzymes are being exploited for water remediation and have proven to be effective in degrading a variety of EPs present in water. However, their high cost still represents a major bottleneck towards their extensive use and exploitation in water remediation. Recent advances in recombinant DNA technology can be used to produce a large number of active enzymes at low costs. The current study focused on the use of recombinantly produced novel members of bacterial peroxidases, named dye decolorizing peroxidases, to study their effectiveness in degrading a number of diverse EPs. In this context, a sensitive bioanalytical MRM-based assay was developed to detect a mixture of 31 EPs and to examine their potential degradation by a panel of bacterial rDyPs. The results showed that not all rDyPs behaved similarly in their abilities to degrade EPs. Some rDyPs showed a promising potential to degrade some EPs while others were ineffective. Additionally, the role of redox mediators for effective EP degradation by rDyPs was also examined. Our studies showed for the first time that recombinant bacterial DyPs can be used to degrade caffeic acid, 2-mercaptobenzothiazole, acrylamide, gemfibrozil, sulfamethoxazole, venlafaxine, biochanin A, prometryn and 3-Methyl-2benzothiazolinone hydrazone, MCPA, penicillin GK and phenytoin.
لعرافة ماجد , محمد لخضر عولمي
كلية العلوم الإنسانية والاجتماعية-جامعة 8 ماي 1945 قالمة · الجزائر
