Ihsan-ul-Haq Toor, حافظ مزمل إرشاد

كلية الهندسة-جامعة الملك فهد للبترول والمعادن · السعودية

In this study, the impingement corrosion and erosion-corrosion characteristics of two types of carbon steel alloys due to liquid jet impingement were investigated. The study was focused on the effect of jet velocity and jet angle on the rate of impingement erosion-corrosion with and without the solid particles of size ranging from 125μm-704μm (means size of 314 μm). Fluid impingement on fluid handling equipments at high velocities results in severe impingement erosion-corrosion issues in different industries. The impingement erosion-corrosion behavior of carbon steel AISI 1030 and API 5L- X65 was investigated experimentally taking into consideration the effect of velocity and different impingement angels (e.g. 15°, 30°, 45°, 60°, & 90°) in 0.2M NaCl solution for twenty four hours.The maximum impingement erosion-corrosion rate was observed at 45° in three different velocities (i.e. 3, 6 & 12 m/s). This maximum erosion-corrosion rate is resulted to the combined effect of shear stress and impact stress on the specimen surface during the test. At lower angles (15°-30°) shear stress was dominant and at higher angles (60°-90°) normal impact stress was dominant. However, there was a balance between these two stresses at 45°, which resulted in the peak impingement erosion-corrosion rate with the deepest wear scar (57μm deep). The wear scar depth in high velocity regions, (near impingement zone) was visualized by optical profilometer. It was observed that with an increase in velocity, the impingement erosion-corrosion rate was also increased.Impingement erosion-corrosion mechanism was analyzed using SEM of the eroded surfaces. Observations of the SEM micrographs, demonstrated that, the recessed scars were formed in the direction of fluid flow. At lower angles (15º-30º) the shallow-elongated ploughing, plastic deformation, raised lips followed by flattening of the ridges were observed. Whereas, at intermediate angles, deep ploughing and deep craters were found. However dimples, micro-forging, extrusion, platelet formation and their removal were identified as dominant mechanisms at 90° angle in the impingement erosion-corrosion experiments.

Dihyatun Hiwayatullah, Ahmad Saeed Masqon, Damanhuri Damanhuri

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

ABSTRAK Pondok Modern Gontor dikenal luas sebagai lembaga pendidikan perintis dalam pembaruan metode pengajaran bahasa Arab di Indonesia. Menggunaan beragam pendekatan baru yang pernah diujicobakan oleh Mahmud Yunus, Pondok Modern Gontor melakukan upaya pembaruan dengan menggunakan Direct Method, memperbarui silabus pendidikan, mempraktikkan teori-teori pengajaran baru, dan menyediakan alat bantu (peraga) pengajaran. Penelitian ini mengkaji praktik pengajaran bahasa Arab di Pondok Modern Gontor dan bertujuan untuk memperlihatkan sampai di mana tingkat kesesuaian metode yang digunakannya dengan prinsip-prinsip dalam metode pengajaran bahasa Arab untuk orang asing. Penelitian ini merupkan penelitian deskriptif. Data utama yang digunakan dalam penelitian adalah beragam dokumen yang berkaitan dengan metode pengajaran bahasa Arab yang digunakan di Pondok Modern Gontor dan data-data lain tentang pengajaran bahasa Arab untuk orang asing. Sedangkan metode pengumpulan data dilakukan melalui observasi langsung dengan cara mengamati praktik pengajaran bahasa Arab di Pondok Modern Gontor. Hasil penelitian menunjukkan bahwa dalam praktik pengajaran bahasa Arab, selain menggunakan teori-teori baru pendidikan, Pondok Modern Gontor pun menggunakan Direct Method. Dalam mempraktikkan Direct Method tersebut Pondok Modern Gontor tidak mengaplikasikannya secara rigid. Beberapa prinsip Direct Method diabaikan dalam praktik pengajaran bahasa Arab. Hanya saja, karena telah dikontekstualisasikan dengan pelbagai kebutuhan pembelajaran, pengabaian atas beberapa prinsip Direct Method itu sama sekali tidak mengakibatkan kegagalan Pondok Modern Gontor dalam pengajaran bahasa Arab. ABSTRACT It is commonly known that Pondok Modern Gontor is the first educational institution that radically revives the method of Arabic teaching in Indonesia. Based on the new Arabic teaching approaches previously exercised by Mahmud Yunus, Pondok Modern Gontor runs its renewal movement by applying the new method (Direct Method) instead of the old ones (Grammar- Translation Method). In addition, Pondok Modern Gontor also revives its syllabi, educational theory, and teaching equipments as well. This research focuses on the efforts performed by Pondok Modern Gontor in Arabic teaching and aims at discovering the extent of its method correspondence to the methods of Arabic teaching for foreign speakers. This research is a descriptive research. The main data of this research are documents which range from books and any other sources on methods of Arabic teaching at Pondok Modern Gontor as well as methods of Arabic teaching for foreign speakers in general. While the instrument the researcher applies for collecting data is observation on teaching practice at Pondok Modern Gontor. The result of research is that the practice of Arabic teaching at Pondok Modern Gontor runs new approaches and applies appropriate educational theories as well. During its teaching practices Pondok Modern Gontor does not follow the principle of Direct Method in its strict and rigid sense. It sometimes, in some extents, neglects some principles of Direct Method. However, it does not have any serious negative implications or causes the failure in its Arabic teaching practices.

Nabil Mameri, Nadia Boudries

المدرسة الوطنية المتعددة التقنيات - الجزائر · الجزائر

Dans la perspective de la mise en oeuvre d'un procédé de traitement d'effluent métallifères, des essais de biosorption ont été réalisés sur des matériaux biologiques issu des fermentations industrielles. Cette étude porte sur la biosorption des cations Zn(II) sur une biomasse morte de streptomyces rimosus brute et traitée par NaOH. L'influence des paramètres physico-chimiques et hydrodynamiques sur la cinétique et la capacité de fixation a été étudiée en mode batch et continu. La régénération du biosorbant ainsi que son aptitude à fixer d'autres métaux lourds a été étudiée. Des résultats très prometteurs ont été obtenus grâce à ce biomatériau a valeur négative.

فاطمة خباز, ابتسام باسي, اماني بلعيد, غندير السعيد, نورية بن حدة

كلية التكنولوجيا-جامعة الشهيد حمة لخضر - الوادي · الجزائر

ينظم القانون سير البلاد ويضمن حماية الفرد والجماعة ورغم ذلك هناك من يخالفه ويتسبب في مشاكل وعرقلة السير الحسن للنظام العام والخاص على مستوى المؤسسات العامة والخاصة . لذلك يعمل العلماء والباحثون كل في المجالات على إيجاد حلول عملية وبسيطة تواكب التكنولوجيا بدلا من الطرق التقليدية المعقدة والغير فعالة لتجنب الفوضى والعيش بسلام ، وفي هذه المذكرة سنحاول تطوير آلية للكشف عن أقنعة الوجه في الأماكن العامة و مختلف المؤسسات و ستكون عبارة عن نظام آلي يوضع امام مداخل المؤسسات والمستشفيات لمراقبة الاشخاص و اجراء تدابير مع المخالفين تسمح لمرتدي القناع الواقي بالمرور وتمنع المخالفين وذلك باستعمال تطبيقات الذكاء الا صطناعي و خوارزميات التعليم العميق حيث اعتمدنا في هذا العمل التطبيقي على تدريب نموذج خاص بنا باستخدام الشبكات العصبية التلافيفية CNN لتحليل الصور والتعرف على الأشخاص و باستخدام خوارزمية SSD Mobile Net التي تتميز بسرعتها وامكانيتها للعمل على الأجهزة ذات الطاقة الطاقة الحسابية المنخفضة كالمتحكم

مهدی عثمان حسن, ناودار صابر فرج

كلية الهندسة-جامعة السليمانية · العراق

Marisa Breathwaite , Martina Rieker

الجامعة الأمريكية بالقاهرة · مصر

In this thesis, I approach digital sex education in Cairo, Egypt and how it is navigated by Cairo’s urban elite. The way digital sex education in Cairo is consumed via social media and online courses is touted as “new” by popular media coverage. The content, products and services boast the first of their kind by the creators of the platforms themselves. That middle and upper class Cairene women are talking about sex online and consuming digital sex education content, in visible public forums, is portrayed as a completely novel phenomenon-in other words, platforms like Cairo’s first femtech company, Motherbeing, are ushering in the belated and long-anticipated entry of Cairo’s women into modern sex discourses and markets of sexual and reproductive health. Through this project, I argue that the digital sex education movement in Cairo, led by regional femtech giant, Motherbeing, is an iteration of late neoliberal ideologies, in which public discourses around sex and sexual health are not necessarily new, but are increasingly visibilized, digitized and financialized and exceedingly in line with neoliberal notions of the free market. I argue that the digital content, online course material and consumer products produced and circulated by the only femtech entity in Cairo inform and reproduce a modern citizen-subjectivity and that the femtech sector’s potential to subsume sex education into the market is worth examining. Talking about sex and producing sex education content in the public forum is not a new occurrence in Cairo, however the marriage of sex education with digital platforms and femtech corporate structure allows us to raise questions about the subject-making power of digital sex education in the late modern. I will investigate the implications of a potential boom in Cairo’s femtech industry, where futures of homogenization are not liberatory, but reinforce liberal conceptualizations of what it means to be a modern, “sex-educated” subject.

سلام كاظم الأوسي, محمود شاكر عبد الحسين

كلية الاداب-جامعة القادسية · العراق

Soumia Chabni

كلية علوم الطبيعة والحياة-جامعة سعد دحلب - البليدة · الجزائر

L’objectif de ce travail est la description morphologique, anatomique, et l’évaluation de l’activité antibactérienne de l’extrait aqueux des feuilles de la mauve sauvage (Malva sylvestris) de deux régions d’ Algérie : Blida et Bouzaréah . La description morphologique a montré que la mauve sauvage présente les grandes caractéristiques de cette famille par la présence d’un calicule en plus du calice et par soudure des pièces sexuelles en une colonne, c’est cette dernière particularité qui a donné le nom de Columnifèr es aux malvacées. L’Etude histologique réalisée sur les feuilles, petioles et tiges révèlent la présence des poils tect eurs et des deux tissus de soutien le sclérenchyme et le collenchyme au niveau de la tige. Nous remarquons également la présence des mâc les d’oxalate de calcium au niveau du parenchyme foliaire. L’extrait aqueux des feuilles de la Malva sylvestris des plantes provenant de deux régions ne présente aucune activité antibactérienne sur les souches bactérienne, (Streptococcus pneumoniae, Klebsi ella pneumoniae, MRSA +

Djemai Hedjazi, Nour-Eddine Bouguechal

كلية التكنولوجيا-جامعة باتنة 2 - الشهيد مصطفى بن بولعيد · الجزائر

Cette thèse traite l’étude des moteurs linéaires tubulaires monophasés à induction à noyaumobile ainsi que les phénomènes accompagnant leur fonctionnement.La présence d’un condensateur dans ce circuit électrique peut changer le comportement de cedernier qui dépend de la tension d’alimentation et de la fréquence.Le déplacement du noyau dans un sens ou dans l’autre, peut enclencher un phénomène deFerro résonance ce qui affecte tous les paramètres du circuit d’où l’appellation moteurparamétriqueL’étude entamée dans ce travail comprend essentiellement les différents types de moteurs àoscillations classés dans la catégorie des machines spéciales. Ce type de moteur basé sur lavariation périodique de l’inductance fonctionne en régime d’oscillation linéaire, provoquantainsi le changement du comportement du circuit électrique accompagné de diversphénomènes électromagnétiques ce qui rend l’approche mathématique et la simulationdélicate. La particularité de son fonctionnement nécessite une conception adéquate d’uncircuit de démarrage et d’un autre circuit pour son freinage.

Suheil A. Khoury, Heba Qasim Alkafri

كلية الاداب والعلوم-الجامعة الأمريكية - الشارقة · الامارات

In this thesis, several numerical methods, that are based on spline basis functions, are suggested for the solution of a general class of fourth order boundary value problems. In particular, The two-dimensional biharmonic equation complemented with Dirichlet boundary conditions is considered. The methods include the bivariate spline collocation using B-splines of degree 5 and 7. Moreover, a combination of finite difference and spline collocation is suggested. Numerical experiments are included to demonstrate the applicability and accuracy of the proposed schemes and to compare them with other techniques that are available in the literature. The numerical results include a special case of the problem which models the two-dimensional steady state incompressible Navier-Stokes equations in streamfunction formulation.