شيحاني إلهام, هتهات السعيد

كلية العلوم الاقتصادية والتجارية وعلوم التسيير-جامعة قاصدى مرباح ورقلة · الجزائر

حافظ حسن محمد الغزالي, طاهر حبيب حسين, محمد وهاب كاظم الجبوري

كلية الهندسة-جامعة كربلاء · العراق

This work presents an experimental and numerical study to investigate enhancement the heat transfer values to heat pipe by using fluidize bed. Using cement fly ash as a fluidize material that was heated to simulate cement factory chimney, the air interred to manufacturing model and heated by electrical heater. Air interring with superficial velocity (0.8739,1.1236, and 1.377) m/s. The cement fly ash particle putting in air flows way at evaporator part with different height (2.5,5,7.5and10) cm.The experimental system (test rig) which includes: flowmeters, thermocouples, U-tube manometer, valves, heat pipes, wooden box, connected airlines, and cyclone, was fabricated to calculate enhancement in heat pipes heat gain. Manufacturing three wick heat pipes was the first step the outer and inner pipe diameter was (22.25 and 19.80) mm respectively, five stainless steel layers fixed inside each pipe. Distilled water was used as working fluid with amount (65.5) ml, and all heat pipes was arranging horizontally in test rig.All the tests were carried out with a Reynolds number range (Re = 2400 – 318728) and uniform inlet velocity conditions, the experimental study also includes preparation of particles and measurement its properties such as density, thermal conductivity, and particles diameter. The flow rate, domain and heat pipes surface temperature and pressure drop, were measured.ANSYS FLUENT bundle-(18) soft program was used to solve the governing differential equations in two and three dimensions to study the effect and focus on heat transfer improvement and particles behavior inside domain.This study found that The maximum Nusselt number was (35.2) which is occurred at (Re = 318728), increasing Reynolds number from (2400 to 318728) gives increased in heat gain at heat pipes evaporator part by (72.5) %, also the results show that increase solid particle degreased porosity by (9%),also Increasing superficial velocity for (0.8739 to 1.337) m/s increased the heat gained at evaporator part to (21) % , The comparison between the experimental and numerical (Nusselt number) shows acceptable agreement, and the maximum and minimum differences were ±(18.6, 4) % respectively.

, Alfred B Prados

كلية مارون سمعان للهندسة والعمارة-الجامعة الأمريكية في بيروت · لبنان

CHELBI, ABDERRAHMANE

كلية التكنولوجيا-جامعة الشهيد حمة لخضر - الوادي · الجزائر

Le but de notre étude est de faire un diagnostic détaillé en but de dégager tous les anomalies qui se posent et par suit de poursuivre le dimensionnement du réseau existant et l’étude de la partie d’extension du réseau pour assainir les eaux usées domestiques et les eaux pluviales

إكرام مرجة, إنتصار مهدي, سعاد حوتي

كلية العلوم الإنسانية والاجتماعية-جامعة ابن خلدون – تيارت · الجزائر

تهدف هذه الدراسة إلى التعرف على تأثير الحرمان الأبوي على إدراك الطفل للنسق الاسري من منظور نسقي، من خلال تحليل حالتين لطفلين يعيشان ظروفًا مختلفة للحرمان (وفاة الأب وغيابه بسبب الهجرة الطويلة). اعتمدت الدراسة على المنهج العيادي، باستخدام اختبار الإدراك الأسري المصور (FAT) والمقابلات العيادية ومخطط الجينوغرام. أظهرت النتائج أن نوع ومدة الحرمان الأبوي يؤثران بعمق في تمثلات الطفل لمنظومة الأسرة، ويتجلى ذلك من خلال اضطرابات في التوازن العاطفي وصعوبات في تثبيت الأدوار داخل الأسرة. كما لوحظت مشاعر متناقضة مثل الغضب، الحزن، الرفض، والرغبة في تعويض غياب الأب. وخلصت الدراسة إلى أن نوعية الحرمان تترك بصمات مختلفة في التكوين النفسي والعلاقي للطفل، وتوصي بضرورة توفير مرافقة نفسية تأخذ بعين الاعتبار ديناميات الأسرة والتمثلات الإيجابية للطفل.

Omar Knio, Sultan Saud Albarakati

جامعة الملك عبدالله للعلوم والتقنية · السعودية

In this dissertation, we develop a new framework for 3D trajectory planning of Autonomous Underwater Vehicles (AUVs) in realistic ocean scenarios. The work is divided into three parts. In the first part, we provide a new approach for deterministic trajectory planning in steady current, described using Ocean General Circulation Model (OGCM) data. We apply a Non-Linear Programming (NLP) to the optimal-time trajectory planning problem. To demonstrate the effectivity of the resulting model, we consider the optimal time trajectory planning of an AUV operating in the Red Sea and the Gulf of Aden. In the second part, we generalize our 3D trajectory planning framework to time-dependent ocean currents. We also extend the framework to accommodate multi-objective criteria, focusing specifically on the Pareto front curve between time and energy. To assess the effectiveness of the extended framework, we initially test the methodology in idealized settings. The scheme is then demonstrated for time-energy trajectory planning problems in the Gulf of Aden. In the last part, we account for uncertainty in the ocean current field, is described by an ensemble of flow realizations. The proposed approach is based on a non-linear stochastic programming methodology that uses a risk-aware objective function, accounting for the full variability of the flow ensemble. We formulate stochastic problems that aim to minimize a risk measure of the travel time or energy consumption, using a flexible methodology that enables the user to explore various objectives, ranging seamlessly from risk-neutral to risk-averse. The capabilities of the approach are demonstrated using steady and transient currents. Advanced visualization tools have been further designed to simulate results.

Abdeldjalil Larbi Youcef , Sabah Gaamoussi

كلية اللغات الأجنبية-جامعة عبد الحميد بن باديس مستغانم · الجزائر

The phenomenon of African refugees is the biggest challenge facing Africans. Africa is themain source of refugees, owing to the economic and political deterioration experienced bymost African countries. As a result of natural disasters, civil wars and conflicts, that have ledto the displacement of millions of Africans to neighboring areas. This study proved thefailure of the international community to contain the phenomenon of refugees around theworld, especially the African refugees, who are constantly increasing the cost of wars,conflicts, natural disasters and the weakness of international laws to protect them and thecountries in control of this phenomenon. This study is highlighting also the dire conditionsof African refugees in Algerian society. In light of Algeria's failure to implement laws toprotect these refugees.And their reluctance to deter abuses committed by some Algeriancitizens against these African refugees. Such as racism and sometimes rejection of theirpresence and sometimes assault them, in the absence and silence of the Algerian government.

fenazi billal, gasmi ishak, medoud abderahim, oulhaci salaheddine elarbi

كلية المحروقات والطاقات المتجددة وعلوم الارض والكون-جامعة قاصدى مرباح ورقلة · الجزائر

UNIVERSITE KASDI MERBAH OUARGLAFaculté des Hydrocarbures, des EnergiesRenouvelable, des Sciences de la Terre etde l'UniversDépartement de Forage et MCPMémoire de fin d’étudeEn vue de l’obtention du diplôme Master ProfessionnelDomaine : HydrocarburesOption : Forage

Diana Mokdad , Marwan Rowayheb

مدرسة الآداب والعلوم-الجامعة اللبنانية الأميركية · لبنان

Lebanon’s foreign policy has been subjected to a variety of internal and external influences that continue to shape its focus and orientation. Among the internal influences on that policy come from Hezbollah, an armed Lebanese political party. This party has had a growing presence and involvement beyond the Lebanese territory both politically and militarily. This turned it into a key player not only domestically but also regionally and internationally. The dissertation argues that even though Hezbollah is a very influential state actor and powerful enough to have its own foreign policy agenda, this political party still has a significant interest in controlling and influencing Lebanon’s foreign policy, especially after the exit of the Syrian troops in 2005. Accordingly, the research question proposed by this dissertation is the following: why does Hezbollah still need to influence Lebanon’s foreign policy, despite all the resources, weapons, and political, legal, and regional support that it has? The thesis studies the reasons in terms of three cases where Hezbollah had a strong influence on the country’s foreign policy: the July 2006 war with Israel, the Syrian civil war, and finally, the U.S. and Arab attempts to isolate Hezbollah through the sanctions policy. Specifically, it analyzes the benefits that Hezbollah can obtain through the country’s official foreign policy.

Sarah Khadidja Ouraghi , M. Boussalah

كلية العلوم-جامعة أبو بكر بلقايد - تلمسان · الجزائر

-La cataracte est une affection oculaire assez fréquente, mais qui n'est plus le fantôme decécité d'avant vu que la chirurgie de la cataracte a fait des progrès énormes au cours desdernières années. Maintenant, en moins de 30 minutes et sans douleur, la vision du patient estrestaurée. Toutefois, il ne faut pas banaliser cette chirurgie. En effet, toute chirurgie peutmener à des complications. Il peut arriver que la vision soit moins bonne au final après lachirurgie, mais cela est rare comme indiqt et explique ci-dessus.