Ahmed Elsadig Mohammed Saeed, Amin Osman Elzupir, Izzeldeen Elfatih Barakat

كلية الدراسات العليا-جامعة السودان للعلوم والتكنولوجيا · السودان

Heterocyclic compounds containing nitrogen is the one of the most important biologicallyactive compounds. Their molecules incorporate the core structure of some antiviral,antibacterial, anticancer, antimalarial and antioxidant drug.In the present research work a series of five and six membered heterocycle containingnitrogen derived from chalcone were synthesized using sonochemistry and microwaveapproach as powerful tools for acceleration of both chalconization reaction and hetero-synthesis. These heterocycles include 2-amino 4,6-diaryl pyrimidine, 3,5-diaryl pyrazole, 3,5-diaryl isoxazole have synthesised from 1,3-diaryl-1,one-3-en. The enones were made in basiccondition and under sonication for 1 hour; this condition has given moderate to goodpercentage yield of 20-99.The synthesis of heterocycles was carried out using a combination of ultrasound andmicrowave irradiation. The reaction was performed using basic catalyst, and ethanolas solvent. A moderate to good yield have afforded in a period of time between 10-30minutes.This work describes a novel approach of combining ultrasound and microwaveirradiation in heterocyclization reactions to overcome solubility constraints and longreaction times.Furthermore, the mechanism of reaction has investigated by the isolation andcharacterization of two isoxazole intermediates, this investigation has demonstratedthat the products were formed through kinetic process.

Burhannudin Sutisna, Suzana Pereira

جامعة الملك عبدالله للعلوم والتقنية · السعودية

Nature is an excellent design that inspires scientists to develop smart systems. In therealm of separation technology, biological membranes have been an ideal model forsynthetic membranes due to their ultrahigh permeability, sharp selectivity, and stimuliresponse.In this research, fabrications of bioinspired membranes from block copolymerswere studied. Membranes with isoporous morphology were mainly prepared using selfassemblyand non-solvent induced phase separation (SNIPS).An effective method that can dramatically shorten the path for designing new isoporousmembranes from block copolymers via SNIPS was first proposed by predetermining atrend line computed from the solvent properties, interactions and copolymer block sizesof previously-obtained successful systems. Application of the method to new copolymersystems and fundamental studies on the block copolymer self-assembly were performed.Furthermore, the manufacture of bioinspired membranes was explored using (1)poly(styrene-b-4-hydroxystyrene-b-styrene) (PS-b-PHS-b-PS), (2) poly(styrene-bbutadiene-b-styrene) (PS-b-PB-b-PS) and (3) poly(styrene-b-γ-benzyl-L-glutamate) (PSb-PBLG) copolymers via SNIPS. The structure formation was investigated using smallangleX-ray scattering (SAXS) and time-resolved grazing-Incidence SAXS. The PS-b-PHS-b-PS membranes showed preferential transport for proteins, presumably due to thehydrogen bond interactions within the channels, electrostatic attraction, and suitable poredimension. Well-defined nanochannels with pore sizes of around 4 nm based on PS-b-PB-b-PS copolymers could serve as an excellent platform to fabricate bioinspiredchannels due to the modifiable butadiene blocks. Photolytic addition of thioglycolic acidwas demonstrated without sacrificing the self-assembled morphology, which led to afive-fold increase in water permeance compared to that of the unmodified. Membraneswith a unique feather-like structure and a lamellar morphology for dialysis andnanofiltration applications were obtained from PS-b-PBLG copolymers, which exhibiteda hierarchical self-assembled morphology with confined α-helical polypeptide domains.Our results suggest that bioinspired nanochannels can be designed via block copolymerself-assembly using classical methods of membrane preparation. Investigation of themembrane formation mechanism leads us to a better understanding of the designstrategies for the development of self-assembled nanochannels from block copolymers. Infurther outlook, our research could give a contribution to the discovery of futuregeneration materials for water purification and desalination, as well as biologicalseparation.

أحلام لعافر, عبدالله معمر

كلية الأدب العربي والفنون-جامعة عبد الحميد بن باديس مستغانم · الجزائر

سرنيا دينار, محمد عينين, نصر الدين إدريس جوهر

كلية الدراسات العليا-الجامعة الإسلامية الحكومية مولانا مالك إبراهيم مالانج · اندونيسيا

Tala El Khansa, Rima Bahous

مدرسة الآداب والعلوم-الجامعة اللبنانية الأميركية · لبنان

Food bloggers are people who write about food in a blog. They share their experiences, identity, and honest opinions, and give readers personal narratives of their experiences at restaurants. The purpose of the study is to explore the language of food bloggers and its perceived impact on readers, and it analyzes the critical discourse of language they use. Four instruments were used to collect data for the study. Questionnaires were distributed online to 52 verified food bloggers on the Zomato application. Eleven followers/ readers were interviewed face-to-face. Document analysis of 52 verified food bloggers accounts on Zomato application and on 30 Instagram accounts were done. The same food bloggers were observed in 11 participant observation meetups. Findings reveal that food bloggers use many language aspects in their reviews; they tend to use descriptive language to talk about the food, and they code switch from one language to another most of the time. Findings also reveal that food bloggers’ language have a great impact on their readers and on restaurants’ reputations. Recommendations for further research on language of food bloggers are suggested.

إيمان أسعد حسن الحجوج, كمال حامد الديب, محمد صلاح زكي أبو حميدة

كلية الآداب والعلوم الإنسانية -جامعة الازهر - غزة-جامعة الازهر - غزة · فلسطين

تتناول هذه الدراسة مظاهر الحداثة في أعمال جبرا إبراهيم جبرا الشعرية، وتقدِّم تصوُّرًا وافيًّا عنها، وعن أبرز ملامحها، وكيف أفاد الشَّاعر من تجاربه النقدية في صقل موهبته الشعرية، والتعريف بشخصيته الأدبية، وتقديم فنِّه الشِّعري، والتأثير في المتلقي. وتكمن أهمِّية الدراسة في تسليط الضَّوء على أعماله الشعرية من خلال منظور حداثي، كما تهدف إلى التعريف بحداثة جبرا، وأثر ثقافته في بناء نصوصه الشعرية، وذلك من خلال المنهج الوصفي التحليلي. وتتناول فصول الدراسة الاتجاه الحداثي في شعر جبرا إبراهيم جبرا، ومظاهر التجديد التي امتاز بها، وكانت علامة فارقة في نبوغه الشعري، وتطرقت إلى أبرز التجليات الإنسانية للحداثة في شعر جبرا من خلال ثلاثة تجلِّيات، هي: الحب، والغربة، والموت، وكان للمذهب الرمزي أثره الفاعل في التجلِّيات، مع أنَّ الرمز قضية قديمة، إلا أنَّها أخذت على أيدي الحداثيين أبعادًا فنية، ودلالية لا غنى عنها، فضلًا عن أهمِّية الأسطورة في إضفاء مسحة موضوعية عليها، وإِنْ شابها شيءٌ من الغموض. ولقد توصَّلت الدراسة إلى أنَّ جبرا إبراهيم جبرا واحدًا من شعراء الحداثة الفلسطينيين بعد النَّكبة، إِذْ إِنَّ للحداثة أثرَها الفاعل في تقديم نصوصه الشعرية في قوالب شعرية جديدة، تلائم إيقاع العصر، وذائقة متلقيه، وإنَّ جبرا نجح في تطويع اللُّغة لإمكاناته الفنِّية، وانتشال مشاعره الحبيسة، ونقلها في صورة فنِّية مؤثرة.

Noura Wahby, Youstina Magdy

كلية الشئون الدولية والسياسات العامة-الجامعة الأمريكية بالقاهرة · مصر

Technical education is a form of education that gained momentum in the 1800s and was considered as a parallel distinct model to general education by the post-war period. Public-private partnerships (PPPs) were one of the scaling up and enhancement efforts of technical education. In Egypt, the technical secondary education system has various school models; however, it was until 2018, when we first see the implementation of an PPP model with the establishment of the Applied Technology Schools (ATS). ATS schools aim at supplying the labor market with experienced skillful competent graduates in the demanded sectors in the Egyptian labor market, and according to international standards. The system started with three pilot schools in the academic year 18/19 and currently it has over forty schools. Within this context, the PPP model adopted in the ATS system remained unstudied, and accordingly the challenges and opportunities to the model was unexplored. Through conducted interviews, the study explains how the ATS schools started in Egypt, its main stakeholders as well as the internal structure inside the ATS school. The study also maps how the PPP model is governed and coordinate in the ATS system. Given this mapping, the study then identifies the PPP model implemented as an operational and educational PPP, explaining the scope, scale, method, and motive of this PPP. Lastly, the study also pinpoints key challenges and opportunities for the currently implemented model of PPP, recommending potential ways of enhancement, which would be useful given the vision of expanding the model in the country to reach 420 by 2030.

Ahlem Bouzaroura , Khaled Saadi

كلية الرياضيات والاعلام الآلي-جامعة محمد بوضياف - المسيلة · الجزائر

The work carried out in this thesis focuses on the need for a strong partnershipbetween families and schools. For the best children education and the academicsuccess. In this context, we have created a system that connects parents and schoolsmanager. Also, we have developed an android application that alerts parents on theirsmartphone about the various activities that concern their children’s education. Inaddition, we have integrated a system that provides the location of the child at everymoment and the path he took during the day

Abou Bekr N , Cherifa Amrani , Benchouk A.

كلية التكنولوجيا-جامعة أبو بكر بلقايد - تلمسان · الجزائر

Le présent travail concerne les corrélations en mécanique des sols et notamment cellesrelatives aux sols compactés.Les sols compactés constituent le matériau de construction de nombreux ouvrages commeles barrages, les routes ou les centres de stockage de déchets. Ces sols ont uncomportement relativement complexe et qui est loin d’être complètement cerné.Les corrélations relatives aux sols compactés sont d’une grande importance dans le métierde l’ingénieur : Estimations dans un avant-projet, contrôle des résultats de mesure,orientation des interprétations des mesures, etc.Des essais de compactage sont réalisés sur l’argile du noyau du barrage Boughrara avecmesure de la succion et de l’indice portant immédiat. Des corrélations de la littérature sonttestées pour ce matériau.

Abdelkrim Mehalaine, Mohamed Berkane , Walid Boukhors

كلية العلوم الدقيقة وعلوم الطبيعة والحياة-جامعة العربي بن مهيدي - أم البواقي · الجزائر

La biométrie est la science qui consiste à établir l'identité d'une personne basée sur la reconnaissance de ses caractéristiques physiologiques et / ou comportementales. Les systèmes biométriques monomodaux utilisant une seule modalité présentent certaines limitations telles que la non-universalité, le manque d'individualité et la susceptibilité aux falsifications. Dans ce mémoire, nous nous sommes intéressés à la fusion des deux modalités les plus utilisées, l'empreinte digitale et la signature manuscrite. Après avoir présenté l'état de l'art de chaque technologie, nous optons pour la fusion au niveau de décision afin d'établir un système multimodal qui permet d'atteindre une bonne d'authentification.