أبو بكر الصديق حميدي, راضية معوش

كلية العلوم الانسانية والاجتماعية-جامعة محمد بوضياف - المسيلة · الجزائر

مروان محمود, محمود صلاح اسماعيل عبد القادر

كلية الدراسات العليا-جامعة النجاح الوطنية · فلسطين

Hybrid power systems based on new and renewable energy sources, especially photovoltaic and wind energy, are an effective option to solve the power-supply problem for remote and isolated areas far from the grids. Microsoft Excel software programming package is used to analyze data measurements for both wind and solar radiation measurements for the two locations in Palestine (Ramallah and Nablus). Results of analysis illustrate that energy density available in wind for Ramallah site is about 2008 kWh/m2.year, while it is 927 kWh/m2.year for Nablus site, and the daily average of solar radiation intensity on horizontal surface is about 5.4 kWh/m2 .day. A Matlab software package is used to develop a simulation program to simulate different scenarios of operation of the hybrid system by making energy balance calculations on an hourly basis for each of the 8760 hours in a year and then to choose the appropriate sizes of the different components for the most optimum scenario. The optimization is based on cost of generation. Results of the simulation illustrate that the most economic scenario is the scenario that uses a hybrid system mainly dependent on wind. Cost of energy (COE) in this scenario is 1.28 NIS/kWh. Other scenarios dependent on wind-only hybrid system, PV-only hybrid system, wind stand-alone system, PV stand-alone system, or diesel only, give results of COE greater than this value. The amount of CO2 produced as a result of operation of the wind-PV hybrid system is very small compared with that produced as a result of operation of the diesel only. This is a very important environmental issue that shall be considered and not ignored. It was concluded that none of the hybrid system scenarios analyzed could presently be justified on COE basis, compared to the alternative of simply purchasing electricity from the grid where the COE is 0.70 NIS/kWh. Considering not electrified far from grid remote areas, changes in electricity prices, subsidy levels, costs for renewable energy equipment, or taking into account environmental considerations might alter the position in the future.

Abd’el Hakim Tahraoui , D. Nabti, Kheira Hafsaoui

كلية علوم الطبيعة والحياة وعلوم الارض-جامعة الجيلالي بونعامة - خميس مليانة · الجزائر

Esaam Abaker Eshag, أمل حميد ماكي

كلية الدراسات العليا-جامعة السودان للعلوم والتكنولوجيا · السودان

In both developed and developing countries, the construction industry is considered to be one of the most significant industries in terms of its impact on health and safety of the working population. Construction industry is both economically and socially important. However, the construction industry is also recognized to be the most hazardous. The objectives of this research are to investigate the safety performance in the construction sites.The data were collected from the contractors, consultant, and by using questionnaire to evaluate the safety performance in the construction sites. In total, there were 80 questionnaireswhich were distributed to respondents, with a response rate of 61 The results show that there was still a lack of commitment from the government, the insurance company, the labor ministry, the owners, consultants, and also the contractors to improving safety performance on the construction sites.The suggestion is to improve the safety performance on the construction sites. Thegovernment should follow up the safety performance by visiting the construction sites. The insurance company should be more active in visiting the construction sites. The owners should be more active towards the safety by controlling, visiting the process in the construction sites.The contractors have to train the workers and promote the safety culture and follow up the safety performance. The consultants should control all the tools in the construction sites to insure that those tools are safe.

Areej Alhareer, Colleen Jackson-Cook

جامعة فرجينيا كومنولث - فرع قطر · قطر

wassim ellah , Yousra Chaguetmi, M Mezzi

جامعة سعد دحلب البليدة · الجزائر

A decision support system (DSS) is a software that provides information used to make decisions. The DSS is generally composed of a knowledge base and an inference engine that contains all the knowledge that is useful for problem solving. The inference engine is a program that uses the knowledge contained in the knowledge base to solve a particular problem described by facts. Some fields, in particular the medical field, are considered huge and have so much information and experiences. As for the medical field it doesn’t only have a huge amount of information, but that information is diverse and wide spread covering many concepts .In this regard, the aim of this work, is to benefit and show the value added by ensemble-based decision-making systems approach. Taking advantage of its separation of concerns and dividing the information and data to conquer by extracting the desired results in a form of decisions. This system will assist the doctor in his reasoning in order to make a diagnosis and choose the proper treatment while making use of the widely used UML language in systems engineering.

صفاء رحموني , منير كسرى

كلية الطب والصيدلة-جامعة محمد الخامس بالرباط · المغرب

Cylia Raked, Hakima Ait Hammi, Noura Kichou, Thinhinane Ould Taleb

كلية العلوم-جامعة مولود معمري - تيزي وزو · الجزائر

L'objectif principal de notre travail est d'étudier la validation analytique de la méthode d'identification de la matière première (Paraffine spéciale) et articles de conditionnement primaire de la Novoformine® par spectroscopie infrarouge par corrélation et en se référant aux conditions et recommandations des ICH, et pharmacopées. Les résultats obtenus par l'étude des deux paramètres de validation, spécificité et robustesse de la méthode d'identification de la matière première et articles de conditionnement primaires, sont conformes et dans les limites de spécification. Cela atteste la validité de la méthode proposée dans notre travail pour l'utilisation en routine.

DJELTI, MELLOUK SANAA

جامعة أبو بكر بلقايد - تلمسان · الجزائر

Ce mémoire se divise en quatre chapitres :Le premier chapitre est destiné à la description générale du réseau sans fil WiMAX et sonprincipe de fonctionnement, il établie un état de l’art des différentes normes WiMAX.Le second chapitre, est consacré à l’étude technique du standard IEEE 802.16 ainsi qu’à ladescription de différentes techniques de multiplexages.Le troisième chapitre traite les données indispensables au processus de dimensionnement.Le quatrième chapitre expose les résultats obtenus de dimensionnement orienté couverture etcapacité du standard IEEE 802.16.

Lamia Mahnane, Laskri

كلية علوم المهندس-جامعة باجي مختار - عنابة · الجزائر