Hend El-Taher, Hussein Amin

كلية الشئون الدولية والسياسات العامة-الجامعة الأمريكية بالقاهرة · مصر

Media is one important constituent of the culture in a society. Its importance is reflected in the contents it presents especially in religion and music. The way both religion and music are blended and used as a medium to gratify certain needs is the interest of this study. In that sense, the relation between religions and music is examined, how music was perceived by religious figures, what disputes the music provoked, and how spiritual music is used as an intrapersonal, interpersonal, or a mass communication tool to influence the audience cognitively, behaviorally, and attitudinally.Accordingly, a descriptive survey is conducted on a purposive sample in six academic institutes in Egypt, the American University in Cairo, the British University in Egypt, the German University in Cairo, Cairo University, Ain Shams University, and Al-Azhar University. The Uses and Gratifications theory and the Social Identity Theory helped to interpret the data that were collected from 383 respondents. Based on the results, 66.8% of 337 participants highly use spiritual and religious music as an emotional therapy. However, using the medium as an emotional therapy did not encourage cultural activities such as attending concerts, buying or selling related products, and reading books.

بدر محمد, شيرين بشير الرداوي , منير العاروض

كلية الزراعة-جامعة الفرات · سوريا

خليل إبراهيم العشي, محمد حيدر

كلية العلوم والأداب-الجامعة الأمريكية في بيروت · لبنان

Magnetic damping plays a pivotal role in devices harnessing the electronic spin degree of freedom, significantly influencing their energy efficiency and operational speed. Despite its crucial role, the persistently high Gilbert damping in common ferromagnetic materials, typically on the order of 10−3, presents a challenge for applications in spintronics and spin-orbitronics that require materials with ultra-low damping characteristics. Alternative materials, such as Heusler alloys and magnetic insulators, have showcased significantly lower damping coefficients below 10−4, primarily due to the absence of conduction electrons. Unfortunately, despite their low damping attributes, these materials pose growth challenges and are incompatible with the widely used Complementary Metal-Oxide-Semiconductor (CMOS) technology, limiting their practical utility. Recent developments in material science search for low-damping material, introduce promising prospects. Cobalt and iron binary alloys, particularly Co20Fe80, challenge the conventional limitations by exhibiting relatively low damping coefficients. Theoretical predictions by Mankovsky et al. propose a damping coefficient of 5 × 10−4 in Co20Fe80, highlighting a unique band structure with a sharp minimum in the density of states at the Fermi level. This minimum aligns with the alloy concentration where the least magnetic damping occurs. Subsequent experimental studies by Schoen et al. validate these theoretical predictions, underscoring the potential of Co20Fe80 alloys as materials with minimal damping characteristics. The focus of this thesis is to study the magnetization dynamics of Co60Fe40 thin films prepared through Pulsed Laser Deposition (PLD). The overarching goal is to develop high-quality nanometer-thick films. The investigation kicks off by scrutinizing the characteristics of CoFe films under diverse deposition parameters, manipulating laser energy and temperature to discern optimal conditions. Once these optimal parameters are identified, a systematic exploration of thickness dependence follows, encompassing variations in the CoFe layer thickness within the range of 10 to 25 nm. Moreover, the study extends to exploring the spin-pumping effect in bilayers of CoFe/Pt. In this aspect, the thickness of the Pt layer is systematically varied, enabling the calculation of the spin diffusion length in Pt. This meticulous and systematic study aims to yield valuable insights applicable to the realms of magnonics, spintronics, and spin Hall devices.

Djayet Zoubir, Nait Slimane Essaid, Ouretmache Mouloud

كلية التكنولوجيا-جامعة عبد الرحمان ميرة - بجاية · الجزائر

Ce mémoire présente une méthodologie générale pour l’automatisation d’un systèmeindustriel. Il a été question d’une étude détaillée portant sur la ligne du dépotage lait cru, qui apermis de modéliser son fonctionnement, ensuite un programme a été élaboré sur le logicielStep7, qui une fois chargé dans l’automate S7-400 va gérer le fonctionnement automatique dela machine.Il est également mentionné une description détaillée sur les automates programmablesindustriels et plus précisément le S7-400 de la firme Siemens. Le gros du travail est consacréà la description du logiciel en mettant en avant les étapes à suivre pour la création d’un projetd’automatisation, la configuration matérielle, l’élaboration du programme et sa simulation.Une supervision du système a été conçue avec Win CC flexible.

أحمد أبو عوف , محمد أيمن أحمد إبراهيم

كلية العلوم والهندسة-الجامعة الأمريكية بالقاهرة · مصر

Radiation sources exist in different kinds of environments where electronic devices often operate. Correct device operation is usually affected negatively by radiation. The radiation resultant effect manifests in several forms depending on the operating environment of the device like total ionizing dose effect (TID), or single event effects (SEEs) such as single event upset (SEU), single event gate rupture (SEGR), and single event latch up (SEL).CMOS circuits and Floating gate MOS circuits suffer from an increase in the delay and the leakage current due to TID effect. This may damage the proper operation of the integrated circuit. Exhaustive testing is needed for devices operating in harsh conditions like space and military applications to ensure correct operations in the worst circumstances. The use of worst case test vectors (WCTVs) for testing is strongly recommended by MIL-STD-883, method 1019, which is the standard describing the procedure for testing electronic devices under radiation. However, the difficulty of generating these test vectors hinders their use in radiation testing.Testing digital circuits in the industry is usually done nowadays using design for testability (DFT) techniques as they are very mature and can be relied on. DFT techniques include, but not limited to, ad-hoc technique, built-in self test (BIST), muxed D scan, clocked scan and enhanced scan. DFT is usually used with automatic test patterns generation (ATPG) software to generate test vectors to test application specific integrated circuits (ASICs), especially with sequential circuits, against faults like stuck at faults and path delay faults. Despite all these recommendations for DFT, radiation testing has not benefited from this reliable technology yet. Also, with the big variation in the DFT techniques, choosing the right technique is the bottleneck to achieve the best results for TID testing.In this thesis, a comprehensive comparison between different DFT techniques for TID testing of flash-based FPGAs is made to help designers choose the best suitable DFT technique depending on their application. The comparison includes muxed D scan technique, clocked scan technique and enhanced scan technique. The comparison is done using ISCAS’89 benchmarks circuits. Points of comparisons include FPGA resources utilization, difficulty of designs bring-up, added delay by DFT logic and robust testable paths in each technique.

Amina Maya Lahneche, Djamila Zama

كلية العلوم الطبيعية وعلوم الحياة-جامعة الاخوة منتورى - قسنطينة 1 · الجزائر

Ghizlene Mansouria Mettioui, Mohamed Belhamiani , Zahra Assala Zehouani

كلية العلوم والتكنولوجيا-جامعة عين تموشنت - بلحاج شعيب · الجزائر

Le refroidissement à haute performance est une exigence essentielle pour les microprocesseurs modernes qui génèrent de grandes quantités de chaleur distribuée de façon non uniforme. Les dissipateurs de chaleur ont traditionnellement été utilisés pour la gestion thermique. Dans cette étude, les effets de certains paramètres de conception sur lesperformances du dissipateur de chaleur à ailettes à plaques planes ont été analysés. Des simulations de transfert de chaleur ont été effectuées à l’aide du logiciel d’analyse d’éléments finis ABAQUSpour comprendre la variation du flux thermique et de la température du dissipateur de chaleur. Trois paramètres ont été variés ; le nombre des ailettes, le flux thermique et le matériau du dissipateur de chaleur, et une comparaison de la distribution du flux thermique et de la température entre le dissipateur de chaleur à ailettes pleines, rectangulaires et perforées a été réalisée. En fin, les résultats ont été discutés.

Kenza Agchariou , Belkacem Outemzabet, Menana Ait Mehdi

كلية الآداب واللغات-جامعة عبد الرحمان ميرة - بجاية · الجزائر

The diversity of the American presidents' rhetoric, notably in the last two decades, became a subject matter and a focal point in the field of discourse analysis. However, unlike the former American presidents, Donald Trump has marked the US rhetorical history with his unique style and his different way of using language. By the end of 2020, he delivered the Acceptance Speech at 2020 Republican National Convention in order to convince the American people to re-elect him for the second time as the president of the USA. This study aims to analyze this speech from a rhetorical perspective based on Jolliffe's Rhetorical Framework (2009), through identifying the rhetorical situation, the three rhetorical appeals (logos, ethos and pathos) as well as the surface features of the speech(diction, syntax, imagery and figurative language). Therefore, the research design of this study is descriptive based on both qualitative and quantitative method. The findings show that the former republican nominee delivered the speech within a specific rhetorical context, as a response to the republican nomination for 2020 elections, to a targeted audience with the aim to win the elections. Besides, the results indicate that Donald Trump made use of all the three rhetorical appeals to persuade his audience, but he inclined more to the use of pathos as compared to the other rhetorical appeals logos and ethos. Moreover, Donald Trump used specific diction, syntax, imagery and figurative language in order to strengthen his position and be more persuasive. To conclude, this study contributes in providing closer insights to the rhetoric used by Donald Trump in his acceptance speech in order to win the elections.

روابح عبدالباقي, طالبي خالد

كلية العلوم الاقتصادية وعلوم التسيير-جامعة الاخوة منتورى - قسنطينة 1 · الجزائر

راتب البلخي, محمد ممتاز الشماع

المعهد العالي لإدارة الأعمال · سوريا

يهدف البحث الى تسليط الضوء على دور أنظمة الطاقة الشمسية في توليد الطاقة الكهربائية بالتناوب مع التيار العام كبديل استثماري عن مولدات الطاقة الكهربائية التي تعمل بالوقود الاحفوري ومساهمتها في تخفيض التكاليف والمحافظة على البيئة. طبقت هذه الدراسة على أحد فروع مصرف الوطنية للتمويل الأصغر حيث تم قياس الأحمال الكهربائية الخاصة بجميع التجهيزات الموجودة بالفرع ثم اختيار المولدة المناسبة وحساب جميع تكاليفها وكذلك الأمر بالنسبة لمنظومة الطاقة الشمسية، باعتبار مدة التقييم ومقارنة كل من البديلين هو ثمان سنوات. ومن أهم النتائج التي توصل اليها البحث بانه بالاعتماد على أنظمة الطاقة المتجددة بشكل عام وأنظمة الطاقة الشمسية بشكل خاص لتوليد الاحتياجات من الطاقة الكهربائية يحقق وفر كبير بالتكاليف كونها منظومات تعتمد على مصدر طاقة متجدد ولا تحتاج لعمليات صيانة معقدة ومكلفة فضلا عن دورها بالمحافظة على البيئة من التلوث من ناحية أخرى تحتاج الى مزيد من البحث والتطوير للتغلب على مشكلة ضعف مردودها وحاجتها الى مساحات واسعة لتوليد كميات كبيرة من الطاقة بالإضافة الى توليد الكهرباء أثناء فترة الليل أو الجو الغائم.