Abdulrahman Faisal Al-Betar, وائل محمد امين محفوظ

كلية الكيميائيات والمواد-جامعة الملك فهد للبترول والمعادن · السعودية

A highly electroactive and low-cost electrode material is an essential requirement in the current sensor and supercapacitor research. To meet this demand, synthesizing biomass carbon through a simple process of pyrolysis and ball milling could be an ideal solution. In this work, active carbon was synthesized from the date leaves waste. The surface, structural, and compositional characterizations support the formation of sub-nano and nano-meter-size carbon particles. The synthesized carbon was successfully used for electrochemical phenolic compounds sensing and supercapacitor applications. The synthesized carbon was immobilized on a Glassy carbon electrode to fabricate a chemical sensor to detect 1-naphthol (1-NP) and 2-naphthol (2-NP) simultaneously. The study provides two methods to fabricate electrochemical sensors. The first method is based on the direct oxidation of 1-NP and 2-NP. The second method is based on redox peaks for the quinone formation from the generated dihydroxy naphthalene. The second method shows a higher analytical performance toward simultaneous detection of 1-NP and 2-NP compared to that of the first method. In the second part of the thesis, a novel carbon was utilized by dispensing on a stainless-steel strip to fabricate a high-performance symmetric supercapacitor. The fabricated supercapacitor shows a double-layer capacitance behavior and a pseudocapacitance behavior due to the heteroatoms in the material. By using an electrolyte of (0.1 M sulfuric acid), the fabricated supercapacitor displays a high specific capacitance of (~107 F/g), and the stability test shows a capacitance retention of 92% after a total of 1000 cycles. Furthermore, the supercapacitor’s densities of energy and power are ~10 Wh/Kg and ~200 W/Kg, respectively, offering an ideal supercapacitor for mass-product. This research provides a low-cost and high-performance supercapacitor based on cheap carbon prepared from the date leave waste. Furthermore, the work was supported with supplementary materials about the fabrication of supercapacitor prepared from stainless and electro-synthesized polyaniline (PANI). The fabricated supercapacitor combines the advantages of the low cost of the substrate and the high electrochemical performance of synthesized PANI. The supercapacitor shows an areal capacitance of ~353 mF cm-2 and densities of energy and power of ~ 26.4 µWh cm-2 and ~ 400 µWcm-2 respectively. The capacitance properties were retained after 1000 cycles showing high stability. Based on the result, the fabricated supercapacitor could be an ideal candidate for wide applications and mass product in the future.

مريم سعود, يوسف عروج

كلية الاداب واللغات-جامعة الجزائر 1 - بن يوسف بن خدة · الجزائر

التصور الفني في القرآن الكريم خاصية أسلوبية تجعل المستمعين نظرة ، وهو خطاب لحاسة الوجدان الدينية بلغة الجمال الفنية ، من خلاله تتحول الكلمات والمعاني المجردة إلى صور نابضة بالحياة والحركة والهدف منه الإمتاع والتقريب للمعاني والتأثير . التصوير الفني في قصة يوسف ثلاثة ألوان يظهر بها هي قوة عرض الأحداث وإحياء المشاهد ، تخييل العواطف والإنفعالات، رسم الشخصيات ، وهي ليست منفصلة ولكن أهمها يبرز في بعض المواقف فيسمى بإسمه .

دوادي الطاهر, التهامي العانز, سالم عطية

كلية العلوم والهندسة-جامعة قاصدى مرباح ورقلة · الجزائر

تحضير و تشخيص بعض قواعد شيف المشتقة من ثنائي أمينو ثنائي فينيل ايثير ايثان ميثان و دراستها كهروكيميائيا

حميدي أبو بكر الصديق, رتیبة لخضاري

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

حدة بن كحلة, كرمية توفيق, نسيمة قويدر

كلية العلوم الاقتصادية والتجارية وعلوم التسيير-جامعة اكلى محند أولحاج - البويرة · الجزائر

زينب العطــوي, حليمة السعدية توامة, مير سيد أحمد

كلية العلوم الاقتصادية والتجارية وعلوم التسيير-جامعة محمد بوضياف - المسيلة · الجزائر

يشهد العالم عدة تطورات تقنية وعلمية في مجال تكنولوجيا المعلومات والاتصالات، فانتشار الأقمار الصناعية وشبكات الانترنت والحاسبات الآلية،ساعد الدول على دخول عالم المعلوماتية ،مماترتب عليه الاهتمام الجاد بالموارد البشرية وتنميتها من طرف المؤسسات،وفي إطار توفر هذه التقنيات اخذ التحول نحو تطبيق الإدارة الالكترونية التي تساهم في تبسيط العمليات الإدارية لزيادة كفاءة العمل الإداري ،ونظرا لحداثة تطبيق الإدارة الالكترونية في البلدان العربية فإننا نجد تفاوت في تطبيقها من خلال تركيزها على متطلبات التطبيق من إمكانات مادية وبشرية وفنية ،فمشروع الإدارة الالكترونية يستلزم قيادات متميزة وذات كفاءة، وبالتالي يعد العنصر البشري ركنا مهما في تفعيل الإدارة الالكترونية ،فتطوير هذا العنصر وتدريبه ،يعد أمرا ضروريا خاصة بعد الثورة المعلوماتية و توسع التقنيات الحديثة ،فنجاح الموارد البشرية والارتقاء بمستواها يتوقف على مدى تنميتها وتطوير مهارتها لتحقيق الكفاءة والرضا الوظيفي في العمل،الذي يعتبر أمرا ضروريا لتفعيل الإدارة الالكترونية والتي على ضوئها يمكن تحقيق أهداف المنظمة .

عبدالفتاح ياغي, راشد إبراهيم المطوع النعيمي

كلية العلوم الانسانية والاجتماعية-جامعة الإمارات العربية المتحدة · الامارات

The success of sports institutions depends on the extent of achieving outstanding sports results not only at the local level but on all regional and international levels. Hence, efficiency of sports institutions is measured by the number of achievements, especially at the Olympics level as it is the highest rank in the hierarchy of sports achievements. The present study begins from a basic assumption that the weakness of the UAE’s Olympic achievements is due to the governance pattern and management and leadership styles in various sports institutions and especially in the sports federations and sports clubs. In this respect, this study aimed to examine the impact of strengthening governance in sports institutions on the achievements of the Olympic sports in the UAE from the standpoint of decision-makers, as well as to identify the extent of the contribution of the governance system in improving the outcomes of sports institutions. For this purpose, a quantitative methodology along with a field survey was used given the nature of the study. The study population consists of decision-makers of the senior leadership in sports institutions, totaling 596 people. The response rate to the study questionnaire was (69.8%), representing (358) of the total number of sports leadership. The study found several important results, namely: (1) 30% of the sports leadership is not satisfied with the Olympic results achieved by the UAE, (2) 36% of the sports leaders believed that there were no clear accountability criteria for officers and employees in sports institutions, (3) sports Leaders believes that the UAE has the potential to host the Summer Olympic Games, (4) 35% of the sports leaders believed that announcement of the strategic and operational plans for sports organizations is made in a transparent manner, (5) 66% of the sports leaders indicated the existence of clear gaps in the current legislation, in relation to sports, (6) 59% of the sports leaders think that the current sports leaders dispose of a considerable degree of scientific knowledge and expertise within their field, (7) 34% of the sports leaders see the non-participation sports institutions in the formulation of the country’s strategic decisions in relation to sports, (8) 32% of the sports leaders highlighted the absence of long-term plans for training and technical to prepare viii athletes competitions, and (9) 81% of the sports leaders pinpointed to the lack of financial support as a cause of not achieving remarkable sports results for the UAE. The study also made a number of recommendations, (1) the importance of selecting sports institutional leaders based on competence, and the need to possess clear and specific vision and objectives, and the need for capacity build-up to be able to resolve problems and make decisions, (2) the support and development of the legal framework through reviewing and updating all laws and regulations governing the sports work in the UAE with the participation of sports institutions, and enforcing existing laws and carrying out benchmarking studies and recommendations to issue new laws to ensure greater transparency, (3) the announcement of reports’ results and strategic action plans and decisions in relation to sports activities, and the announcement of the strategic and operational plans for sports organizations in a clear and transparent manner, (4) the promotion of the principle of participation through the development of a clear methodology governing the mechanism of the participation of sports institutions in the organization of sports activities in the country and the development of general policies and the formulation of strategic sports decisions, (5) the focus on developing long-term training and technical plans, (6) the importance of the availability of strong financial budgets and marketing strategies to enable sports institutions of self-development of their financial resources, (7) the focus on increasing research studies in relation to governance for sports institutions and increase awareness and interest in the study of governance in general, and the governance of sports institutions in particular. (8) the conduct of innovative studies to determine the extent of change that may occur in relation to the application of governance in UAE’s sports institutions, given the government’s general tendency towards strengthening the principles of corporate governance in all sectors of the state, including sports, and (9) the conduct of specialized studies on sports federations and sports associations and sports committees and sports clubs in relation to governance, separately. Keywords:- Governance, Strategy, Transparency, Accountability, Participation, Achievements.

Cristian Enache, Farah Hussein Ajeeb

كلية الاداب والعلوم-الجامعة الأمريكية - الشارقة · الامارات

The problem of optimizing a domain dependent functional, while keeping a domain’s measure (its volume, perimeter, etc.) fixed, is called an isoperimetric problem. The isoperimetric inequalities have a long history in mathematics dating back to the Greeks and Dido’s problem, when the first classical isoperimetric inequality appeared in the Euclidean geometry. With the introduction of the calculus of variations in the 17th century, the isoperimetric inequalities found their way into mathematical physics. Among the isoperimetric problems, here we propose the investigation of those linking the shape of a membrane to the sequence of its frequencies. The starting point in this research field is the Faber-Krahn inequality, which states that among all fixed membranes of given area, the first frequency is minimal for the circular membrane. As for the second frequency of fixed membranes of given area, we know that it is minimized by the disjoint union of two identical circular membranes (Krahn’s inequality). For other types of membranes several results are known, but a lot of questions remain open. In this thesis we are going to present some classical isoperimetric inequalities, as well as some universal bounds, which are not isoperimetric, but in some cases they represent the best possible bounds obtained at their time. Finally, we will present some new universal bounds we have obtained for the frequencies of clamped and buckled plates.

عبدالرزاق خيون خضير, باسم عبد الجليل جراد الفضلي, جاسب كاظم عبدالحسين

كلية الآداب -جامعة ذي قار-جامعة ذي قار · العراق

Abd El Kader Ayadi, Khadidja Zaidi

كلية الأداب واللغات-جامعة العربي بن مهيدي - أم البواقي · الجزائر

With the recent development of language teaching, researches in language methodology have become prominent in a foreign language teaching and learning. Therefore, teachers of English as a foreign language took the responsibility of developing effective strategies to encourage learners develop their writing skills in the target language. The present research investigates the effect of mentor texts on the writing achievements through a quasi-experimental design. The sample of this study is second year middle school pupils at Abdelhamid Ibn Badis middle school. The sample was split into two groups (experimental and control groups) of 20 students out of 100 students. Both groups were pretested and went through the treatment periods. Students of the experimental group performed the task with the reading aloud session of the mentor text, while the ones in the control group worked individually. At the end of the treatment, the two groups were post-tested. To add more validity to the results of the study, t tests were administered. The results showed that mentor texts method was significantly effective in improving learners' writing achievement. Thus, the hypothesis of this study was confirmed.