Leila Roubache , صلاح رضوان

كلية العلوم-جامعة محمد بوضياف - المسيلة · الجزائر

Ce travail s’articule autour d’exposer la QCD perturbative comme une théorie des champsquantique.La première partie est consacrée à étudier en détail le modèle de parton suivant un ordrechronologique en décrivant les résultats expérimental du SLAC, puis étudier la diffusion inélastiqueprofonde (DIS). On a calculé la section efficace pour la collision électron-proton. On a discutél’échelle de Bjorken, l’interprétation de Feynman pour le modèle de parton. Suivé par undescription des fonctions de distribution des partons (PDFs) et l’équation d’évolution (DGLAP).La seconde partie est dédiée à le processus Drell-Yan en LO. On a calculé la section efficacepartonique entre quark et antiquark. Puis utiliser ce dernière dans le calcul de la section efficacehadronique entre deux protons par l’utilisation de la théorème de factorisation.La dernière partie , on a discuté le processus Drell-Yan en NLO et les défis en ordre supérieur deradiation de QCD. On a calculé l’espace du phase pour deux, trois et quatre particules. Finalement,on a construite la relation récursive d’espace du phase pour n-corps pour l'implémenter dansl'intégration d’espace de phase de Monte Carlo

Karim Filali , مينة أيت أمغار

كلية الطب والصيدلة - مراكش-جامعة القاضي عياض · المغرب

إيران ديفيد شاري برادا, سوزانا بيريرا نونيس

جامعة الملك عبدالله للعلوم والتقنية · السعودية

The objectives of this work are (i) to prepare silver and TiO2 nanoparticlesfunctionalized with polymers or alkoxysilanes as capping agents with specificcontrol of morphology, size, and chemical reactivity and (ii) their attachment tothe surface and pore wall of ultrafiltration membranes. These particles areinteresting due to their known antibacterial, anti-biofouling efficiency, besides thephotocatytic activity exhibited by TiO2.The first chapter focuses on the synthesis and characterization of silvernanoparticles. Their performance depends on the shape, size and other colloidalcharacteristics. A complete analysis of the effect of the stabilizer and pHconditions on particle size and shape was conducted by using polyethyleneimineand polyvinylpyrrolidone. Opposite trends and different morphologies wereobserved for both stabilizers.The second chapter describes the surface attachment of TiO2 nanoparticles ontopolyetherimide ultrafiltration membrane with pore size around 134nm by usingorganoalkylsilanes. Excellent hydrophilicity (contact angle 39  2) and high andthermal stability (260oC) was achieved. Particles and membranes samples werecharacterized by microscopy, chemical and surface analysis.

فلاديمير باجيتش, وائل علوي

جامعة الملك عبدالله للعلوم والتقنية · السعودية

The problem of developing drugs that can be used to cure diseases is important and requires a careful approach. Since pursuing the wrong candidate drug for a particular disease could be very costly in terms of time and money, there is a strong interest in minimizing such risks. Drug repositioning has become a hot topic of research, as it helps reduce these risks significantly at the early stages of drug development by reusing an approved drug for the treatment of a different disease. Still, finding new usage for a drug is non-trivial, as it is necessary to find out strong supporting evidence that the proposed new uses of drugs are plausible. Many computational approaches were developed to narrow the list of possible candidate drug-target interactions (DTIs) before any experiments are done. However, many of these approaches suffer from unacceptable levels of false positives. We developed two novel methods based on graph mining networks of drugs and targets. The first method (DASPfind) finds all non-cyclic paths that connect a drug and a target, and using a function that we define, calculates a score from all the paths. This score describes our confidence that DTI is correct. We show that DASPfind significantly outperforms other state-of-the-art methods in predicting the top ranked target for each drug. We demonstrate the utility of DASPfind by predicting 15 novel DTIs over a set of ion channel proteins, and confirming 12 out of these 15 DTIs through experimental evidence reported in literature and online drug databases. The second method (DASPfind+) modifies DASPfind in order to increase the confidence and reliability of the resultant predictions. Based on the structure of the drug-target interaction (DTI) networks, we introduced an optimization scheme that incrementally alters the network structure locally for each drug to achieve more robust top 1 ranked predictions. Moreover, we explored effects of several similarity measures between the targets on the prediction accuracy and proposed an enhanced strategy for DTI prediction. Our results show significant improvements of the accuracy of the top ranked DTI prediction over the current state-of-the-art methods.

المعتصم حمود, حسين المسروري

كلية العلوم الزراعية والبحرية-جامعة السلطان قابوس · عمان

To ensure the sustainable use of the fisheries resources in the Sultanate of Oman requires effective enforcement of and compliance with fisheries management rules and regulations. To reduce the extent of fisheries non-compliance the Ministry of Agriculture and Fisheries initiated its Monitoring, Control and Surveillance (MCS) operations. The main objective of this study was to investigate and evaluate the process of fisheries enforcement as applied to the traditional sector. The study was conducted in three wilayat of Ash-Sharqiyah South Govern sample of 100 fishermen from three wilayats and 20 enforcement officer was selected. The survey was carried out using face-to-face interview with fishers and enforcement officials. The data and information collected on the subject-matter were analyzed using descriptive and inferential statistical techniques. With respect to fishers' background profile, the results show that 39% of the fishers were above the average age of 34 years and 75% of the fishers have more than ten years of experience in the sector. It is noted that 85% of the interviewed fishers were vessel owner. It is also found that fishers (67%) are involved in multiple fisheries and they use multiple gears. Significant differences exist among fishers in regard to the overall law awareness and specific components of the law thereby indicating a communication gap between the authority and the fishers. In relation to fisheries violations 60% of the fishers think that the number of violations were same during the past two years. With respect to the participants' subjective probabilities, the null hypothesis for the following cases such as probability of violating again, probability of authority presence, probability of catch confiscation, probability of gear confiscation and probability of license confiscation was rejected at the 5% level. The results also indicate that fishers do not consider peer pressure and the probability of other fishers reporting violation to the authority. Although the subjective probabilities in relation to prosecution, conviction and penalty are relatively high the overall probability of conviction is affected by the low probability of detection. It is also noted that the results in regard to the probability of prosecution, conviction and penalty show similarity between the two stakeholder groups, Fisher's views from three study areas were similar in regard to the court process, penalty severity and the effectiveness of MCS and sanctioning. Enforcement officers view that fishers are very familiar with the law and that fishers consider severe penalties associated with non-compliance.Based on the findings it is recommended that the enforcement authority should design an effective enforcement plan by considering the issues identified in this study and design appropriate strategies to prevent non-compliance. It is also important to strengthened the current enforcement programs by negotiating a join enforcement approach with key stakeholders. It is hoped that the findings from this study will encourage further research in this important area and provide useful information to the Ministry of Agriculture and Fisheries so that effective enforcement strategies can be formulated

حاجي عبد الحكيم, فرحات فؤاد, نصر الدين لعويد

كلية التكنولوجيا-جامعة الشهيد حمة لخضر - الوادي · الجزائر

La présence de CO2 dans le gaz naturel provoque plusieurs problèmes d’exploitation et environnemental suivant leurs conditions dans les installations telle que la température et la pression.Pour remédier à ce problème de CO2, il est indispensable de réduire sa teneur dans le gaz naturel durant l’exploitation par un mode de traitement approprié.Dans ce travail, le procédé de décarbonatation par d’absorption est le mode de traitement choisi, en utilisant le mélange de méthyldiéthanolamine et diéthanolamine (MDEA+DEA) comme solvant d’extraction de dioxyde de carbone à une concentration initiale de 8.5%.L’étude de cas du champ Rhourde Nouss, où la teneur CO2 après traitement est de 2.8% a été étudié et nous avons trouvé que le débit de solvant est le facteur d’influence sur la teneur de CO2 et tout ça après l’ajustement des plusieurs paramètres d’exploitation par une simulation de logiciel Hysys pour avoir un pourcentage environ 2% selon la norme de vente ;يسبب وجود ثاني أكسيد الكربون في الغاز الطبيعي العديد من المشكلات التشغيلية والبيئية اعتمادًا على ظروفها في المنشآت مثل درجة الحرارة والضغط.لحل هذه المشكلة، من الضروري تقليل محتواه في الغاز الطبيعي أثناء التشغيل بطريقة المعالجة المناسبة.في هذا العمل، عملية إزالة الكربون عن طريق الامتصاص هي طريقة العلاج المختارة، وذلك باستخدام مزيج من ميثيل ديليثانولامين وثالثيانولامين (MDEA + DEA) كمذيب لاستخلاص ثاني أكسيد الكربون بتركيز مبدئي قدره 8.5٪.تمت دراسة حالة حقل رود نوس، حيث نسبة ثاني أكسيد الكربون بعد العلاج 2.8٪، ووجدنا أن تدفق المذيب هو المسبب الرئيس في نسبة ثاني أكسيد الكربون وكل ذلك بعد تعديل العديد من عوامل التشغيل بواسطة محاكاة برنامج Hysys للحصول على نسبة مئوية حوالي 2٪ وفقًا لمعايير المبيعات.

Nawel Boughiout, غير معروف

جامعة ميامي · الولايات المتحدة

أحمد شداد, العجال بو زيان

كلية العلوم الاقتصادية والتجارية وعلوم التسيير-جامعة عبد الحميد بن باديس مستغانم · الجزائر

جميلة بوريشة, نوال طويل, هاجر تيبري

كلية العلوم الاجتماعية-جامعة عبد الحميد بن باديس مستغانم · الجزائر

Zeina Rahme, Christy Mady

كلية العلوم الإنسانية-جامعة سيدة اللويزة · لبنان

Many studies have been conducted on social media’s role and especially the role of Instagram in increasing sales and in yielding positive results for luxury brands, but none of these studies was conducted on Lebanese women. Using the framing theory and the perception theory, this paper explores how important is the presence of luxury brands on Instagram for Lebanese females aged between 15 and 35.A survey was distributed to a sample of 335 females aged between 15 and 35 using different variables to measure how these females perceive data and different content from luxury brands on Instagram. An interview was conducted with four different luxury brands in Lebanon (Zuhair Murad, Elie Saab, Aishti, and Chalhoub group) for understanding how these brands frame their content on Instagram, what they provide online, and what they focus on the most. Results showed that luxury brands frame data on Instagram by choosing what to provide online through highlighting the positive aspects of their brands and neglecting the “not so positive” ones. Luxury brands specify when to post their products online, how to present them through stories, photos, or videos, and how to relate their specific products to the culture and to the needs of their audiences, and in this paper how to relate data to the needs of the Lebanese females aged between 15 and 35. Moreover results from the survey showed that the presence of luxury brands on Instagram is effective and encourages Lebanese females to stay updated, to get informed, and to create feelings with the brands, which leads to an increase sales and yields successful results.