Maad Alowaifeer , يوسف محمد جمال عودة

كلية الهندسة-جامعة الملك فهد للبترول والمعادن · السعودية

Due to the increasing carbon emission in the atmosphere, the world is witnessing a transition in the power system with the integration of renewable energy sources (RESs). According to the international energy agency (IEA), RESs are set to expand by 50% between 2019 and 2024. Moreover, 50% of the generation is planned to be from RESs in Saudi Arabia by 2030. However, these RESs require interfacing devices to be properly integrated into the grid, i.e., inverters. As a result, inverter-based resources (IBRs) are respectively increasing. However, the working principle of IBRs is completely different from synchronous generators (SGs) which are the main energy source in the conventional grid. Therefore, the need for new control methodologies, which resolve the stability problem of low-inertia grids, is critically substantial. In this Thesis, we propose a microgrid system comprising a DC side, an AC side, and an external grid. A hierarchical control algorithm is proposed to manage the power flow between the DC side components (PV, batteries, and supercapacitors) while regulating the DC bus voltage. The regulated DC bus voltage is fed into the AC side, which features a grid-forming inverter based on the virtual synchronous generator (VSG) topology. Two control methodologies are proposed to enhance the VSG inverter. The first is an adaptation control method based on a fuzzy logic controller (FLC) that optimizes the inverter's frequency performance. The gains of the FLC are optimized using the differential evolution (DE) algorithm. The second is a seamless transition control method that enables seamless switching between the islanded and grid-connected modes. The proposed control methodologies are validated through comprehensive analysis and nonlinear simulations using MATLAB/Simulink. The results demonstrate that the proposed hierarchical control algorithm and control methodologies effectively regulate the microgrid operation and enhance the performance of the VSG inverter, making it suitable for various applications.

-, Ahmed Hassan Ahmed

معهد الدراسات البيئية-جامعة الخرطوم · السودان

فاطيمة يحيى, مختار مويسي

كلية الآداب واللغات-جامعة غرداية · الجزائر

This research has been conducted to investigate the effects of using artificial intelligence-based platform (Napkin AI) on enhancing the oral proficiency of EFL learners. The experiment was carried out, during the academic year 2024–2025, on 56second-year university students at the university of Ghardaia, via applying Napkin AI in teaching speaking skills: through observation and performance rubric, the learners’ oral performance was assessed in this case. The data were collected using a questionnaire, prepared for the purpose of the present study, which assessed the students' perceptions of the use of the platform and its contribution to their oral performance. The survey was divided into four major parts: demographic information, using the Napkin AI platform, words spoken-related problems, observations and comments. Statistical analysis was descriptive and results were accompanied by relative frequencies and explanatory tables. Most students felt that using Napkin AI helped them order their thoughts, build fluency and reduced their speaking anxiety. The learners also explained that the platform's visualization contributed to their expression in English. But there were some drawbacks, including the initial digital training they had to conduct, and finding it hard to use the tool in classes with little time. The research suggests that in oral expression classes, it is better to incorporate intelligent visualization tools like Napkin AI, and it gives students some training beforehand so that it can be used well and integrated.

بلحيدري عبد الكريم, benkedda siham, meddour meriem, mekimah boualem

كلية التكنولوجيات الحديثة للمعلومات والاتصال-جامعة قاصدى مرباح ورقلة · الجزائر

Université Kasdi Merbah Ouargla Faculté des Nouvelles Technologies de l’Information et de la Communication Département d’Electronique et Des Télécommunications

Kholoud Obaid Al Antali, اياد حسين, منال الحلبي, مولود كواش

كلية حمدان بن محمد لطب الأسنان-جامعة محمد بن راشد للطب والعلوم الصحية · الامارات

Background:Early Childhood Caries (ECC) is one of the most common childhood diseases in preschool children. Many young pediatric patients with ECC receive Dental treatment under Dental General Anesthesia (DGA). Changes in Oral Health-Related Quality of Life (OHRQoL) can be used to assess the outcome of DGA treatment. The aim of our study was to assess whether dental rehabilitation of young UAE children under DGA improved OHRQoL for children and their families.Materials and Methods:A cross sectional study, using a pre-and-post design survey to evaluate changes in OHRQoL following comprehensive dental treatment under GA was conducted. A total of 173 parents completed Early Childhood Oral Health Impact Scale (ECOHIS) before and three to six months after their children mean age 4.6 (+ 1.86 years) underwent comprehensive dental treatment under DGA by a specialist pediatric dentist in a pediatric dental clinic in Al Ain City, Abu Dhabi Emirate during a year period from 1st March 2017 to 28th February 2018. The ECOHIS and its effect size (ES) served to evaluate children's OHRQoL, the Wilcoxon signed-rank, Internal consistency and the Kruskal-Wallis test were used for statistical analyses.Results:A total of 244 patients who fulfilled the inclusion criteria were included in the study pre-operatively. However, 71 participants did not complete the post-operative questionnaire and a total number of 173 parents completed the pre- and post-operative ECOHIS questionnaires, and this accounted for 71% response rate. The mean dmft of the children prior to the treatment was 13.8 (+ 3.07). Pain and eating problems among children and parents feeling upset and guilty were the most frequently reported impacts at baseline. The overall ECOHIS scores decreased significantly (p < 0.001) after DGA treatment, revealing a large ES for the child (2.19) and family (2.79) sections of the ECOHIS. The change in the child’s self-image and social interaction scores was statistically related to their caries experience.Conclusion:DGA treatment resulted in significant improvement in all child and family physical, psychological and social aspects of oral health quality of life. There is a need for studies to involve more children including those with special needs and medically compromised children in all of the UAE emirates and also studies for surveying the effect of DGA on OHRQoL of school age children, with the questionnaires being completed by children themselves and not their parents/guardians.

حاج عبدالقادر يخلف, عبدالقادر بوباية

كلية العلوم الإنسانية والعلوم الإسلامية-جامعة وهران 1 - أحمد بن بلة السانية · الجزائر

إن الحضارة الإسلامية قدمت الساجد على المساجد و الإنسان على العمران و العالم على الجاهل، و اصهر جميع من اعتنق الإسلام شرعة و منهاجا في بوتقة واحدة، يخدم الإسلام بنفسه و ماله و عقله، مشاركا في ترقية الأمة و النهوض بحضارتها، و في هذا الإطار كان للبربر دور لا يستهان به في التاريخ و حضارة الأندلس، بما قدموه دفاعا عن بيضة الإسلام، و بما أسهموا به في التاريخ الفكري للمنطقة. إن الإسهام الفكري للبربر بالأندلس من العهد العامري إلى نهاية الوجود المرابطي (371-539ه/981-1148م) يعتبر امتداد لمشاركتهم العلمية بالأندلس منذ استقرار الدولة الأموية و تأسيسها لأولى القواعد، التي ستبنى عليها النهضة العلمية لاحقا، لتكتمل في أبهى حللها خلال عخد الخلافة و ما بعده

Bouchra Benattia, Ikram Khelfa , N. Zebboudj , W. Yezli, Zohra Guelilia

كلية علوم الطبيعة والحياة-جامعة ابن خلدون – تيارت · الجزائر

La fusariose vasculaire est une maladie majeure de la tomate, en raison de sa capacité à se maintenir dans le sol. Elle est causée par deux espèces de champignons Fusarium oxysporum et Fusarium solani. Ainsi, la lutte biologique offre une alternative aux produits chimiques. Notre étude se concentre sur l’utilisation de biochar de sciure, parmi différents types de biochars selon les températures (300, 400 et 500°C) et les concentrations (0,5%_1%_2%_4%_8%). In vitro et dans des graines d’orge et de laitue. Ce biochar joue rôle crucial dans le biocontrôle des agents pathogènes, favorisant la croissance des plantes, en stimulant leur croissance, ainsi qu’à la dégradation des substances nocives. En agissant directement sur les souches de Fusarium oxysporum et Fusarium solani, le biochar de (300°C/3h) inhibe la croissance de ces pathogènes. L’utilisation du macérat du biochar dans la préparation du milieu PDA influence fortement sa croissance. Dans ce contexte, les résultats démontrent clairement l'efficacité du biochar pour réduire la propagation de ces champignons pathogènes et un effet positif pour inhiber la croissance de ces champignons. En agissant comme un agent de biocontrôle, le biochar limite la colonisation fongique tout en préservant la santé des racines des plants de tomate. Cette approche prometteuse ouvre de nouvelles perspectives pour des pratiques agricoles durables et respectueuses de l'environnement.

Farid Younes , Millie Achaa

كلية رامز ج. شاغوري للعمارة والتصميم والفنون الجميلة-جامعة سيدة اللويزة · لبنان

I have read in Aidoo’s Dilemma of a Ghost that it is sometimes assumed by the west that Africans were incapable of coherent reasoning. With this ambiguous implication, one is forced to conclude that, this meant that African ethnicities and their visual art designs lacked the matter and the form which made the other groups of mankind supposedly think more logically. I intend to dispel such myths as far as Acholi of Uganda are concerned by introducing a peak look through the designs of living expressed in the Acholi ethnicity. I hope, through this little work that scholars of other academic persuasions will continue to speak up for their own people so that the whole worthlessness of the invalid beliefs may be finally exposed. The thesis examines Acholi visual designs in terms of Acholi ethnic context, meaning and function. It is important to the Acholi for their visual designs to be reexamined in the eyes of the Acholi people. Hypothetically, if an artist/designer is to considered eligible to interpret/analyze Acholi visual design, he/she should be initiated in the ethnicity of the Acholi culture. A methodology partly according to Berlyne, Ogilvie and Mathew Ajayi using 16 in-depth interviews is adapted with Acholi and non-Acholi professional designers of various disciplines. Architects, artists, interiors, anthropologists who are educated in and teach history of arts selected from Gulu University in Acholi and Notre Dame University Louaize, American University of Beirut, Lebanese American University in Beirut and Byblos, are selected in order to investigate three main aspects: one, the composition, meaning and ethnic values present in Acholi ethnic visual designs. Two, Acholi concept of beauty, Acholi creative means and what makes them distinctive. Three, the principal features that recur to give Acholi visual designs and ethnicity Acholi identity.

Abdelmadjid Latreche, F Sebaa

كلية العلوم-جامعة أبو بكر بلقايد - تلمسان · الجزائر

عبد اليزيد داودي, يوسف بوالقمح

كلية الحقوق والعلوم السياسية-جامعة 8 ماي 1945 قالمة · الجزائر

تتعرض حقوق الإنسان لانتهاكات جسیمة، سواءً بسبب تصرفات الدولة أو بسب الحروب أو الكوارثالطبیعیة، یتبع ذلك أحیانا تمادي الدولة في رفض التحرك لإیقاف ذلك، أو عجزها عن معالجة بعضالأوضاع، ما أدى بالمجتمع الدولي إلى تطبیق فكرة التدخل الإنساني لمصلحة هذه الفئات المنتهك حقوقهاأو المنكوبة، على الرغم من تعارض ذلك مع بعض مبادئ القانون الدولي، حیث ظهر جدال كبیر بین فقهاءالقانون الدولي في هذا الموضوع، أین جرت نقاشات واسعة حول تغلیب القواعد الثابتة التي یستند إلیهاالقانون الدولي؛ كمبدأ عدم جواز التدخل في الشؤون الداخلیة للدول، ومبدأ منع استخدام القوة... أم القواعدالمنظمة لفكرة التدخل الإنساني.بدأ هذا التعارض یظهر بشكل جدید وبحدة أكثر خلافا للشكل التقلیدي، أین كان تقوم الدول بالتدخلاتالإنسانیة في ظل عجز الأمم المتحدة عن التحرك، حیث أصبح التدخل الإنساني یتم من قبل هذه الأخیرةأو عبر موافقتها، فالأمم المتحدة بدأت تصبح مظلة شرعیة للقیام بعملیات التدخل الدولي الإنساني، ما طرحإشكالیة تماشى هذا الدور للمنظمة مع میثاقها، خاصة وأن المیثاق جاء لیكرس أهم مبادئ القانون الدوليالحدیث من منع التدخل في الشؤون الداخلیة للدول ومنع استخدام القوة.بلغ النقاش حول موضوع التدخل الإنساني ذروته أثناء تدخل حلف الشمال الأطلسي في كوسوفو، نظ ا رلخصوصیة الإقلیم من جهة وكیفیة تعامل الأمم المتحدة معه من جهة أخرى، حیث لم تمنع تدخل الحلف كمالم تأمر به، ما جعل الكثیرین ینتظرون أن یعطى تدخل الحلف أجوبة حاسمة حول التدخل الإنساني.