مروان محمود , حنان محمد محمود علي

كلية الدراسات العليا-جامعة النجاح الوطنية · فلسطين

This research deals with comparison between four mechanisms in operating a supposed water pumping system. These mechanisms are PV generator, diesel generator, diesel motor and electrical grid. Referring to the research it is found that PV generator is more feasible than diesel generator where the cost of one cubic meter when using diesel generator is higher by about 80% than its cost when using PV generator. A vertical turbine pump was used instead of submersible one as it can be driven directly by a diesel motor and then the cost of one cubic meter of water is calculated and compared to PV water pumping system but also the last one is morefeasible and more economical. When comparing PV generator with grid, the cost of water is very close to each other even that the cost of water by using grid is less than PV. Finally, load matching technique with dual PV water pumping systems is applied depending on the daily solar radiation curve, where the cost of one cubic meter is decreased of about 9% in comparison with one PV generator. Future works aspires to utilize sun tracking in addition to the matched load by PIC control.

محمد سعد الدين عبدالغفور عبدالماجد

جامعة النيلين · السودان

The problem of the charged spheroidal bubble is studied using the virial method. The conditions that are necessary for equilibrium arededuced and the oscillation of the bubble is studied . The frequenciesbelonging to the second order harmonics are found .Further extension of the virial theorem is made by studying theviscous fluid sphere in an incompressible viscous fluid giving thedifferent and necessary virial equations of motion for both theexterior and the interior media and then the equilibrium state isstudied.

Abdelkrim Beniaiche , Abderazak Besbes

معهد البصريات والميكانيكا الدقيقة-جامعة فرحات عباس - سطيف1 · الجزائر

Le dioxyde de titane TiO2 est un semi-conducteur ayant des propriétés physicochimiquesintéressantes notamment dues à sa grande stabilité chimique en milieu basique et àson activité photocatalytique. Le but de ce travail est d’augmenter la concentration desporteurs de TiO2. Et de diminuer le gap optique de l’oxyde de titane. Pour cet effet on estcontraint de doper le TiO2, et d’utiliser l’argent comme un matériau dopant. Les échantillonssont des couches minces déposées par voie sol-gel.

خضير عباس خزعل التميمي , رجاء خليل أحمد الدليمي , سامي عزيز عباس العتبي

كلية التربية للعلوم الانسانية-جامعة ديالي · العراق

Rachid Alim Klaimi, Sabla Alnouri

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

The excessive increase in carbon dioxide emissions through the past several decades has raised global climate change concerns. As such, environmental policy makers have been looking into the implementation of efficient strategies that would ultimately reduce greenhouse gas (GHG) emission levels, and meet strict emissions targets. As part of a national emission reduction strategy, the reduction of carbon-dioxide emissions from industrial activities has been proven to be very significant. This instigated the need for a systematic carbon integration approach that can yield cost-effective carbon integration networks, while meeting prescribed carbon dioxide emission reduction targets in industrial cities. A novel carbon integration methodology has been previously proposed as a carbon network source-sink mapping approach using a Mixed Integer Nonlinear Program (MINLP), and was found to be very effective to devise emission control strategies in industrial cities. This work aims to further improve the design process of carbon integration networks, by coupling carbon integration networks with hydrate suppression-moisture removal options. This was found vital for the prevention of any potential hazards that are associated with the transportation of carbon dioxide in pipelines, such as hydrate formation and various corrosion effects, which may result from moisture retention. An extensive analysis of carbon capture, dehydration, inhibition, compression, and transmission options have all been incorporated into the network design process, in the course of determining cost-optimal solutions for carbon dioxide networks. The proposed approach has been illustrated using an industrial city case study that shows how the integration between different plants in a specific site could be a valuable method for carbon footprint reduction.

عبدالعزيز بن علي المحويتي, محمود ماضي

كلية الدعوة بالمدينة-جامعة الإمام محمد بن سعود الإسلامية · السعودية

تمار يوسف, سمهان بن لعلام

كلية علوم الإعلام والاتصال-جامعة الجزائر 3 - إبراهيم سلطان شيبوط · الجزائر

القائم بالاتصال وحارس البوابة مفهومه وبعض النماذج المفسرة له،وطبيعة عمل البرمجة التلفزيونية والمبرمج التلفزيوني ومسألة الابداع ومنطق البرمجة وهدفها، واستراتيجية البرمجة التلفزيونية والمعايير المتحكمة فيها، وبالنسبة للاطار التطبيقي فقد احتوى على التنظيم الهيكلي والمؤسساتي التلفزيون الجزائري وبرمجته بالتالي وصف وتحليل المبرمج بالإضافة إلى نتائج الدراسة.

أحمد علال, خلف الله بوجمعة, عبيد السبيعي

معهد تسيير التقنيات الحضارية-جامعة محمد بوضياف - المسيلة · الجزائر

عبدالمجيد بوكير, يوسف طهار

كلية العلوم القانونية والاقتصادية والاجتماعية -جامعة سيدي محمد بن عبدالله - فاس-جامعة سيدي محمد بن عبدالله - فاس · المغرب

Mawada Mohammed Elhassen Awad Elkariem, Muneef Abdelbagi Babiker

جامعة الخرطوم · السودان

Community based health insurance (CBHI) is a health care financing, non- profit, voluntary insurance mechanism for urban and rural self employed and informal sector workers. CBHI in Sudan started in Khartoum state by the end of 1997 . the first experiment took place in Umdawan ban locality. The present study illustrates the experiment of Umdawanban and throws light on the coverage and determination of premiums . the study focuses on the causes of failure, it also suggests some remedies. The methodological approach of the present study is descriptive and analytical in nature. The data of the study is extracted from references, papers, reports and interviews. The study conclusively comes to the result that the experiment of umdawanban was not founded on scientific basis in both design and application. And it faces the moral hazard, adverse selection and financial instability problems. The procedures taken to tackle the above mentioned problems were in some cases scientific and contradictive to the ethics and principles of health insurance in others. The researcher recommends that insurers must conduct a prior study of the targeted population to determine their financial risk protection, willingness to pay and average risk suffered to determine suitable premiums and offer an affordable benefit package