Hafsi Miloud, Kebiche Mustapha , Rouabhi Amar

كلية علوم الطبيعة والحياة-جامعة فرحات عباس - سطيف1 · الجزائر

Dans la région de Sétif, l’agriculture occupe un rôle très important sur le plan socioéconomique ; au fil des années elle a été souvent influencée par la faiblesse des précipitations annuelles, en effet, le climat semi aride local est très contraignant, son caractère imprédictible affecte aussi bien la rentabilité agricole que la prise de décision au sein de l’exploitation agricole. Selon certains modèles de prédiction climatique, le climat futur de l’Algérie sera exposé { des scénarios dramatiques. Ce qui aura des répercussions directes sur l’agriculture, de ce fait, il est temps de penser dès maintenant aux modalités d’adaptation et d’atténuations des effets des changements climatiques futurs sur l’agriculture. La présente étude expose comme problématique : l’analyse du comportement des agriculteurs vis-à-vis de la variabilité climatique locale et leur aptitude à entreprendre de nouvelles pratiques capables d’assurer la viabilité de leurs exploitations. L’échantillon comporte 537 exploitations réparties sur trois zones du Sétifois : la zone nord, la zone centre et la zone sud.L’analyse climatique confirme le pattern pluviométrique Nord/sud, cependant, la zone nord devient moins humide et les zones centre et sud maintiennent presque le même taux de pluviosité durant les trente dernières années. Alors que les températures moyennes et minimales de la ville de Sétif, enregistrent une hausse avoisinant 1°C à partir des années 1996 à 1998. Les majeures transformations des pratiques agricoles considérées dans la cadre d’adaptation, relèvent de l’abandon des cultures pluviales et l’adoption de l’élevage avicole et bovin et les cultures intensives. En effet, le rôle de l’Etat { travers les programmes de développement agricole ; consistera à promouvoir les techniques d’économie d’eau et à gérer la reconversion des pratiques agricoles vers les systèmes intensifs, notamment dans les zones touchées par le Changement climatique.

آمنة عثمان علي الفيتوري, عزام أحمد صالح سلطان, علي محمد المرتضي

كلية طب وجراحة الفم والأسنان-جامعة بنغازي (قاريونس سابقا) · ليبيا

Ameloblastoma is a rare odontogenic neoplasm of the mandible and maxilla, with multiple histological variants, and high recurrence rates if improperly treated. It is a locally invasive neoplasm often associated with morbidity and facial deformities, showing increased epidermal growth factor receptor (EGFR) expression. EGFR stain location plays a vital role in assessing its proliferative potential, biological aggressiveness and treatment options. This study was aimed to assess the clinic-histopathological features of the ameloblastoma cases and to study (Immunohistochemistry examination) the immune -expression of EGFR in ameloblastoma cases to clarify their role in the biological behavior of the benign and malignant ameloblastoma. Materials and Methods: A descriptive case-series study of twenty-five patients diagnosed as ameloblastomas was conducted during the period from 1995 to 2010.The present study was undertaken in oral pathology laboratory at Faculty of Dentistry, University of Benghazi. The data were collected and reviewed from patients' charts. Clinical and epidemiological data were taken. Histopathological examination and Immunohistochemistry were done. The immune expression of EGFR reaction in ameloblastomas were positive or negative reaction. Data collected and then analyzed by Statistical program (SPSS).Results: The age of the subjects ranged from15 to 50 years with mean age 29.1 and SD 10.586 years. M:F ratio 1.5:1. More than half of cases of ameloblastomas mainly in right side of the mandible, while 44 % in left side of the mandible, and only 4% in both sides. Histopathological examination. Most cases were cystic 48 %, plexiform represents 32 % whereas, follicular and desmoplastic were seen in 16% and 4% of cases respectively. granular cell, acanthomatous and basal cell were not observed in the ameloblastoma. The ameloblastomas. cases (21) 86%were positively stained immune reactions to EGFR. The cells were observed mainly in combined of cytoplasmic and membranous followed by membranous, while nearly (only 4 lesions)represent 14% were negative staining. Conclusions and Recommendations: The study concluded that most of ameloblastomas appear most commonly in the third to fifth decades. The majority of ameloblastomas indicate the biological behavior of the tumors as an aggressive because, most of tumors were solid and multicyclic based on their histological classification, rather than benign also frequently invade locally and no metastasize was recorded. The majority of ameloblastoma are positive for immune reaction to EGFR, about 9 cases combined cytoplasmic and membranous, 4 cases combined nuclear ,cytoplasmic -and membranous, 8 cases membranous. The distribution of EGFR expression in ameloblsatoma 48%focal reaction, 40%diffuse reaction, 12% negative reaction. The staining intensity of EGFR 6 cases strong positive staining, 11cases moderate positive staining, 4 cases weak staining, 4 cases negative reaction.

سميرة قدوش, بلقنيشي الحبيب

كلية الحقوق والعلوم السياسية-جامعة ابن خلدون – تيارت · الجزائر

سعاد حميدي, سليمان العمراني

كلية العلوم القانونية والاقتصادية والاجتماعية - طنجة-جامعة عبدالمالك السعدي · المغرب

محمد الشيخ عمر, محمد الفاتح حسن بشير

كلية القانون-جامعة النيلين · السودان

آسي عبد السلام هلال, سمير سرور

كلية الطب البشري-جامعة دمشق · سوريا

Sulaiman Nasser Salim Al-Mazrooei, Zainab Al Bulushi

كلية الإقتصاد والعلوم السياسية-جامعة السلطان قابوس · عمان

This thesis delves into the challenges encountered by organizations in Oman as theyundertake solar energy projects and the corresponding strategies that can be employed tonavigate these hurdles. The renewable energy sector is a prominent path to competitiveadvantage, notably by harnessing clean energy that augments the overall quality of life.Central to this research are two pivotal questions: what specific challenges manifest whenmanaging solar projects in Oman? Secondly, which strategies prove effective insurmounting these challenges? In pursuit of answers, lists enumerating these challengesand strategies were drawn from existing literature and subsequently enriched by insightsfrom semi-structured interviews. These challenges were methodically categorized usingthe PEST (Political, Economic, Social, and Technological) framework. This groundworkled to a survey completed by twenty domain experts, which ranked the challenges andpaired them with potential strategies. The data gathered was subjected to analysis via theTechnique for Order Preference by Similarity to Ideal Solution (TOPSIS). Emerging fromthis in-depth exploration, the research concludes that a strategic partnership is theparamount supply chain strategy to overcome the challenges faced in Oman's solarprojects.

Mamdoh Ahmed Mahmoud Sharawi, Mohamed Mohamed Omer Mohamed Yousef

كلية الدراسات العليا-جامعة السودان للعلوم والتكنولوجيا · السودان

Recently measuring of stroke volume by scintigraphy has been used as indicator of heart muscle ability to contract. This study aimed to identify and evaluate the stroke volume. Accordingly the data was collected from 50 patients at Elnilein medical center, department of nuclear medicine, during the period from 4/4/2011 to 24/8/2011. The patients were injected with a 99mTc-sestamibi (hexakis [2-methoxyisobutylisonitril]) and 99mTc-tetrofosmin (1, 2-bis [bis (2-ethoxyethyl)-phosphino] ethane) then gamma camera was used to detect the count rate and hence stroke volume was calculated. The data were analyzed by using statistical packages for social studies (SPSS) under windows using linear association between age, body mass index, stroke volume, cardiac output and ejection fraction. Consequently the results revealed that the stroke volume increased as the cardiac output and ejection fraction increased with direct liner relationship by a coefficient factor equal to 0.58% per L / min, and 0.55 % per ejection fraction units. Also the age and body mass index showed a invers linear relationship with the stroke volume. The stroke volume decresed by 0.9 % per years of age and by 1.3 % per body mass index units.

Amar Chabane, Mohamed Bengana, Souhila Bessoul

كلية العلوم البيولوجية والزراعية-جامعة مولود معمري - تيزي وزو · الجزائر

عبد ﷲ أحمد أنور المولا, فيصل الخليل

كلية الهندسة المدنية-جامعة دمشق · سوريا