أشجان فيصل شكري داود, غسان خالد
كلية الدراسات العليا-جامعة النجاح الوطنية · فلسطين
Mubbashar Ahmad Shah, Nuhad J Daghir
الجامعة الأمريكية في بيروت · لبنان
سامية أريفي, ياسين البغدادي
كلية الطب والصيدلة -جامعة سيدي محمد بن عبدالله - فاس · المغرب
بوعلام وعيل, خالد السراج
كلية الاداب واللغات-جامعة الدكتور يحيى فارس بالمدية · الجزائر
جلول بن قومار, سعد بن قريد
كلية العلوم الاجتماعية والإنسانية-جامعة غرداية · الجزائر
من خلال الدراسة التي قدمناها حول شخصية السلطان المغربي محمد بن عبد الله وجهوده في إعادة بناء الدولة العلوية في الفترة الممتدة ما بين (1757-1790م) نجد أن هذا الأخير قد ساهم مساهمة فعالة في بناء الدولة على الصعيد الداخلي والخارجي، بعد ما شهدت البلاد فوضى دامت ثلاثين سنة. فبمجرد توليه الحكم سعى إلى ترتيب البيت الداخلي وذلك من خلال اهتمامه بالمجالات المؤثرة في الدولة، فقد سعى إلى تنظيم الجيش وتطويره بالإضافة إلى الاهتمام بالمجال الإداري والاقتصادي، دون إهمال المجال الثقافي الذي يعتبر سيرة ملوك العلويين. أما عن الصعيد الخارجي فقد سعى إلى إرجاع المغرب الأقصى إلى مكانته الدولة زمن جده المولى إسماعيل، فعمل إلى توطيد العلاقات مع دول الضفة الشمالية للمتوسط على غرار فرنسا وإسبانيا والنمسا وإنجلترا، كما شهد عهده اعتراف المغرب بالاستقلال الولايات المتحدة الأمريكية سنة 1776م، أما عن العالم الإسلامي فقد شهدت العلاقات تبادل عدة سفارات مع دولة العثمانية، وبخصوص إيالاتها فكانت ودية مع إيالتي طرابلس الغرب وتونس ومتباينة مع إيالة الجزائر.
راشد العبري, وليد علي سيف العربي
كلية الهندسة-جامعة السلطان قابوس · عمان
Renewable energy has an increasing role in achieving the goals of sustainable development, energy security, and control of greenhouse gas emissions. Wind energy is the most popular form in use for electricity production due to a steady advancementof wind power technology with a decline in total costs. Furthermore, new designs and sizes of blades and generators have enabled investments in very low wind speed areas. The same advances have encouraged Daleel Petroleum Company to look into utilizing wind energy at its oil operation fields.Daleel fields are flat and free of obstacles. The wind speed and wind power density average 3.7 m/s and 53.859 W/m2, respectively, at measurement height level (8 meters). This study has assessed the wind energy potential at 80 meters in height(turbine hub height), and it has determined the wind speed and energy at hub height to be around 5.1 m/s and 136 W/m2, respectively. In the wind energy market, there are mainly four types of wind turbines, each with different sizes of generator and blade lengths. This study has reviewed them and recommended the type C doubly-fed induction generator (DFIG) and type D full-scale converter for Daleel wind farm project as they can harvest the energy of the very low wind speeds of Daleel’s fields. Moreover, it has selected, on the basis of site-matching methods, the 3.4MW wind turbine with 140-meter rotor diameter for the wind farm. This study has determined six 3.4MW wind turbines as the number of the turbines needed for meeting the anticipated future load of Daleel’s Fields. To achieve maximum output of the wind farm, it has advised distributing the wind turbines in a matrix layout with a 1.26Km spacing distance between turbines. The designed wind farm is expected to generate around 38.8 GWh/year, equal to 27.7% of Daleel’s annual consumption of electricity. It will save approximately one million OMR (1.16) in operating expenses (OPEX) for Daleel’s electrical system. Furthermore, it will reduce around 21,728 tons of the carbon dioxide emission produced from the power plant. The electrical system of the wind farm has been designed to transmit the energy harnessed by the wind turbines via a network of low- and high-voltage cables and step- up transformers to the point of common coupling. Moreover, the wind turbines are fitted with current controllers, which enable the turbines to inject reactive current for support of the grid during network faults, and they are provided with reactive/voltage controllers for grid compliance during steady-state operations.This report has studied the impact of the designed wind farm on the existing protection system of Daleel micro-grid. The study has observed that the designed wind farm blinds the operation of overcurrent relays in Daleel power plant for the three-phase fault on OHL at a 30Km and greater distance. Hence, the study has advised adjusting the time and current pick-up settings of a few protection relays. In the end, this study has evaluated the economics of the designed wind farm basedon very simple methods such as payback period (PBP), internal rate of return (IRR), and net present value (NPV). It has concluded that Daleel Company can invest in wind energy for achieving short PBP, high IRR, and high NPV if the following marketparameters are met:1- The discount rate is between 5% and 7%.2- The capital cost ranges from 352.66 to 553 OMR/KWh.3- Electrical losses are no more than 15%.
محمود لطفي نايف عبدالله, وائل أبو صالح
كلية الدراسات العليا-جامعة النجاح الوطنية · فلسطين
Mona Humaid Al Janahi, Rodney Tyson
كلية الاداب والعلوم-الجامعة الأمريكية - الشارقة · الامارات
Computers and computer technologies are gradually becoming ubiquitous tools in some English second language writing classrooms. The aim of this study was to examine the perceptions and attitudes of secondary- and university-level teachers and students in the United Arab Emirates towards the incorporation of computer-assisted language learning (CALL) in ESL writing classes. In addition to that, the study sought to find out teachers' use, if any, of computer technologies in ESL writing classes. The study also attempted to investigate the similarities and differences in the ways teachers and students perceive the use of computers in English language writing classrooms. To investigate such perceptions and attitudes, surveys and interviews were used to gather data. The study's subjects included 23 secondary- and university-level English teachers and 99 secondary- and university-level English language learners. Findings of this study indicate that the majority of the participating teachers integrated communicative and integrative tools of CALL in their ESL writing classes. Results also showed that the majority of the participants, both teachers and students, were in favor of the incorporation of CALL in ESL writing classes. What is more, results also revealed that students' and teachers' perceptions were more similar than different. Implications for a successful incorporation of CALL in ESL writing classes included the conduction of needs analysis for both teachers and students to investigate their familiarity with the CALL tools that are to be incorporated. Also suggested is the supply of state-of-the-art facilities and equipment in schools and institutes of higher education to encourage teachers and students to use CALL. Pedagogical implications included the implementation of classroom management strategies such as monitoring students' use of CALL while engaged in writing activities. Finally, the study also calls for further research to look into the impact of CALL on classroom management, and the similarities and differences in the use of CALL in writing classes across various government schools.
Maroun Kisrwani, Rabi Elias Azar
الجامعة الأمريكية في بيروت · لبنان
زوينة بنت خلف بن محفوظ الغاوية, حمد بن سليمان السالمي
كلية التربية-جامعة السلطان قابوس · عمان
هدفت هذه الدراسة إلى الكشف عن فاعلية استخدام برمجية في الوعي بالآثار التاريخية العمانية لدى ) طالبة من طالبات 60طالبات الصف الحادي عشر، حيث استخدمت الباحثة المنهج شبه التجريبي، لعينة تكونت من ( 12 _ 10( مدرسة أم الخير للتعليم الأساس ي ) طالبة 31( شملت المجموعة التجريبية ، وقد قس مت العينة إلى مجموعتين ،) درسن 29، وتضمنت المجموعة الضابطة (Tellagami الآثار التاريخية العمانية عن طريق برمجية ) طالبة درسن بالطريقة ومقياس ي ، وتم التحقق من تكافؤ المجموعتين من خلًل التطبيق القبلي لاختبار المعارف الأثرية العمانية ، الاعتيادية الاتجاهات والسلوك نحو هذه الآثار
