أمينة كتاني , حنان سلاماني, حياة سيدي صالح

كلية العلوم الاجتماعية والإنسانية-جامعة الجيلالي بونعامة - خميس مليانة · الجزائر

صغیر نور الدين, عطاء اﷲ أحمد

معهد التربية البدنية والرياضية-جامعة عبد الحميد بن باديس مستغانم · الجزائر

Melodina Stephans, Rashed Hamad Alneyadi

كلية محمد بن راشد للإدارة الحكومية · الامارات

Lila Rahmani, Berri Kaci , Mechri Nabil

كلية العلوم الاقتصادية والتجارية والإدارة-جامعة عبد الرحمان ميرة - بجاية · الجزائر

Dans ce présent mémoire, nous nous sommes intéressés à traiter l’effet des IDE sur lesecteur agroalimentaire en Algérie, il a été illustré par l’étude du cas de l’accord entre la firmemultinationale (Danone) et la PME (Djurdjura) et leur effet sur la laiterie Soummam. Nosrésultats montrent que la présence de la firme multinationale Danone a permet àl’amélioration de la qualité des produits par le transfert de technologie, et de savoir-faire etpermettre aussi à la création de la compétitivité et de la concurrence.

أحمد شفيق السكري, محمود محمد محمود, وفاء يسرى إبراهيم

كلية الخدمة الاجتماعية-جامعة الفيوم · مصر

سعد العاصي , عبد الرزاق الشحادة

كلية الاقتصاد-جامعة حلب · سوريا

ايناس محمد الربيعي, زينب عبد الزهرة عبد الحسن

كلية العلوم للبنات-جامعة بابل · العراق

The field of nanotechnology aims to make electronic components smaller and smaller, eventually achieving length scales of less than 2 nanometers. This thesis, aims to contribute to the understanding of these components by investigating the structural, electronic, optical and thermoelectric properties of a system containing metallic threads that are joined by a single molecule. The theoretical approach used is a combination of density functional theory and Greene's equilibrium dispersion theory of functions.The structural properties of two groups of Binzodicollagenatphenon (BDC), using the strategy of increasing the molecular length of both groups,were investigated.Group (B) the molecular length was increased by repeating the base unit for five times, from which we obtained five molecules of (BDCB) compounds. As for group (N), the length was increased by repeating the base unit, as well as the number of carbon atoms that form the backbone of the molecule from two to four carbon atoms.Electronic, optical and electrical properties such as the distribution of molecular orbitals, highest occupied molecular orbitals (HOMO)-lowest unoccupied molecular orbitals (LUMO)gaps, transport coefficient, oscillator strength, UV spectrum, and thermoelectric properties. The electronic calculations have demonstrated that the transport mechanism of charge carriers in this type of molecule is the transport mechanism dominated by HOMO. Importantly the molecular length not only affected the transport coefficient and electrical conductivity but also created the quantum size effect, which affected the HOMO-LUMO gap. The shortest molecular length (1 N) has the highest electrical conductivity (0.27) and the widest HOMO-LUMO gap (2.51 eV). Whereas, the lowest conductivity (0.07) and the narrowest gap (1.241 eV) are presented by the longest molecular junction (5N(.The researcher also notice for the two groups (BDCN) and (BDCB) that with the increase in the molecular length, the oscillator strength increased and this is due to the effect of quantitative size.For the group's thermoelectric properties (BDCN), The researcher studied the Seebeck's coefficient S and the figure of merit (ZT). The results showed that the sign of Seebeck's coefficient S for all compounds is positive. These results supported the initial prediction that the transport mechanism is HOMO-controlled transport. Moreover, these results provided an excellent idea for the design of thermo-molecular devices. The results of this work presented an interesting strategy to enhance the ZT by increasing the number of carbon atoms and base unit frequency. When comparing the two groups (BDCB) and (BDCN), The researcher found that group (N) is better in terms of optical properties, as it has a higher oscillator strength than group (B), and this made it a promising candidate for using it as an effective laser medium.Finally, based on the results presented in this thesis, the structures and molecules studied in this work can be promising candidates for wide application such as light-emitting diodes (LEDs), field-effect transistors (FETs), solar cells, and touch screens and laser active medium

Abdelfettah Boualaoui, Abdelkader Abekhti, Abdelmadjid Badjenna

كلية العلوم والتكنولوجيا-جامعة أحمد دراية - أدرار · الجزائر

Ali Ben Lechheb , Yacine Rahmani Abdallah

كلية التكنولوجيا-جامعة محمد بوضياف - المسيلة · الجزائر

Les bâtiments à étages souples sont susceptibles de s'effondrer en cas de séismes violents. Cependant, les chances de survie des bâtiments exposés à des tremblements de terre de faible à modérée intensité sont assez bonnes. Cette étude établit les courbes de fragilité qui déterminent la probabilité d'effondrement des bâtiments. Ces courbes de fragilité offrent une représentation réaliste de la vulnérabilité du bâtiment aux séismes, de manière différente de l'approche traditionnelle qui se base sur la demande sismique. La méthode d'analyse statique non linéaire en poussée progressive a été performée en utilisant le logiciel ETABS. Ensuite, le logiciel SPO2FRAG a été utilisé pour générer les courbes de fragilité. Dans cette étude, une structure en acier a été étudiée. Les résultats obtenus mettent en évidence la fragilité notable des structures à étages souples.

حاتم ز. ابراهيم , تغريد ابونادا

كلية العلوم الصحية-جامعة قطر · قطر

Background: Anaphylaxis is a serious systemic allergic disease that often mani-fests with a broad array of symptoms and leads to death if not immediately treated by the administration of epinephrine auto-injector (EAI). Aims and objectives: To assess EAI dispense as an indicator to estimate anaphylaxis in Qatar, to determine the common causes of anaphylaxis in Qatar, to dissect the clinical profile of patients, and to determine the comorbidity factors in patients with anaphylaxis in Qatar. Methods: A retrospective study conducted using 1,068 electronic medical records (EMR) of anaphylaxis patients through the period of 2012 to 2016. The majority of the patients were collected from dispensed EAIs of outpatients (622) and the remainder (446) were from ICD-10 codes. To assess the feasibility of using the dispensed EAIs as possible measure for anaphylaxis, we calculated the sensitivity and specificity of this test on our patients’ cohort (1,068). The demographics data, triggers, co-morbidity factors, symptoms, and clinical manifestations were catego-rized and thoroughly analyzed. Statistical analysis was performed with version 24 SPSS statistic software package. Results: The sensitivity of dispensed EAIs to detect anaphylaxis was 87.0% with positive predictive value (PPV) of 80%. There were 574 patients (53.5%) diagnosed with anaphylaxis, male to female ratio was 1.2, and 300 patients (77.9%) were less than ten years. Food was the leading trigger of anaphylaxis (n=316, 55.0%) followed by insect stings (n=161, 28.0%) and drugs (n=103, 17.9%). Asthma (n=208, 36.2%), atopic dermatitis (n= 195, 33.9%) and allergic rhinitis (n=81, 14.1%) were the common comor-bidity factors that significantly associated with anaphylaxis. Symptoms included 87.9% cutaneous, 69.1% respiratory, 47.5% gastrointestinal, 15.8% cardiac, and 8.8% neurologi-cal. Patients treated without the use of EAIs (n=143, 77.7%) were exposed to more serious adverse events including two deaths and one shock. Conclusion: This study will serve as a clinical guide for clinicians at allergic and pediatrics clinics and might be used as a base-line to assess the future trend of anaphylaxis in Qatar.