http://dspace.univ-djelfa.dz:8080/xmlui/handle/123456789/5 2026-06-08T19:58:00Z http://dspace.univ-djelfa.dz:8080/xmlui/handle/112/8240 Ethical dimension and professional conduct (the foundations) ZAOUAI, Said Course Overview The Algerian University has experienced very strong growth in all its main indicators, as shown by the number of university institutions and their geographical distribution, the number of students and graduates, the diversification of training courses and scientific research activity. As a result, this densification of the university space has raised several questions. However, it is important to remember that the purpose of the university is to promote scientific knowledge on the one hand and universal values on the other. It is in this spirit that the pedagogues of recent years have proposed the opening of a student-teacher dialogue and have suggested the establishment of know-how related to ethics and deontology. Course Objectives At the student level, the main objective of this course is to facilitate an individual's immersion in student life and his or her transition into a responsible adult. At the teacher level, this course allows a reflection on the standards that define the concrete obligations to which all actors and the teacher are subject. These standards should be defined and consolidated into a code of ethics that would facilitate teachers' decision-making by putting in place rules, recommendations and procedures. 2025-11-12T00:00:00Z http://dspace.univ-djelfa.dz:8080/xmlui/handle/112/8219 Polycopy of courses Mechanical Construction II Intended for 3rd Year Undergraduate Students. Option: Mechanical Construction TAHIRI, Antar Preface This mechanical construction course is intended for third-year undergraduate students who have chosen the mechanical engineering track with a specialization in mechanical construction. It corresponds to the Construction Mechanical (II) module: Semester: 6 Subject: Mechanical construction II Course Unit: UEF Hours: 67 (Lectures: 3 hours, Tutorials: 1.5 hours) Credits: 6 Coefficient: 3 This course is a continuation of the CM1 curriculum and focuses primarily on the sizing calculations for the main motion transmission components of machines (gears, bearings, shafts, etc.), as well as the general technological study of mechanisms (reducers, gearboxes, etc.). It is written in a simplified style, with exercises at the end of each chapter that I believe are helpful for understanding the course content. This course equips students with the ability to analyze and calculate the various components of a machine. The content of this course material is structured into five chapters. Chapter 1 is devoted to gears, studying geometric characteristics of gears for different types, namely cylindrical gears with straight teeth, helical gears, bevel gears with straight teeth and helical teeth, and finally the worm and wheel. The processes for obtaining them and the cutting of gears are also part of this chapter. Chapter 2 is devoted to the dynamic study of surface pressure and breaking strength for cylindrical gears (straight and helical teeth). The study of shafts and axles under various stresses, including traction and compression, shear, torsion, and bending, occupies Chapter 3. The calculation of the preliminary diameter of the axles and shafts, as well as the verification of the shafts and axles for fatigue, is studied. Chapter 4 is dedicated to the study of bearings and thrust bearings as well as belt and chain transmission systems. We are looking for their essential characteristics such as length, transmission ratio and center distance already studied. Chapter 5 is devoted to the technological applications of the elements studied previously, namely: reducers, gearboxes and epicyclic gear trains, their description and operation, as well as their kinematic diagrams. ii Chapter 6 is devoted to general concepts of couplings. Their types and functions are examined. The different types of clutches and brakes are discussed. Finally, this course conforms to the curriculum adopted by the Ministry of Higher Education and Scientific Research; it contributes to the improvement of mechanical engineering education 2026-04-29T00:00:00Z http://dspace.univ-djelfa.dz:8080/xmlui/handle/112/8196 Cours de La Méthode des Plans d’Expériences HADJI, Tarek Avant-propos a méthode des plans d’expériences, ou Design of Experiments (DoE), constitue aujourd’hui un pilier essentiel dans la conduite des essais scientifiques et techniques, en particulier dans les domaines liés aux matériaux de construction. Elle permet non seulement d'optimiser les ressources expérimentales, mais aussi de mieux comprendre les interactions complexes entre les paramètres influençant le comportement des matériaux. Ce polycopié s’adresse aux étudiants du Master 2 Génie Civil, spécialité Matériaux en génie civil, et vise à leur fournir une formation structurée et progressive à cette méthode, en lien direct avec les besoins de la recherche appliquée et de l’ingénierie. 2025-11-12T00:00:00Z http://dspace.univ-djelfa.dz:8080/xmlui/handle/112/8193 Étude de l'effet de l'utilisation du drainage sur la stabilité des barrages en terre soumis à des charges sismiques : Cas barrage d'Oued El-Kolla _ W. Ain temouchent BOURROUROU, ABDELAZIZ Abstract This study evaluates the stability of the Oued El-Kola earth dam (Aïn Témouchent, Algeria), located in a seismic zone. Using Geo-Slope numerical tools (SEEP/W, QUAKE/W, SLOPE/W), a two-dimensional modeling was carried out to analyze the static and dynamic response of the structure subjected to a seismic load (accelerogram of 0.25g). The results show significant instability and a risk of liquefaction in the absence of corrective measures. The study proposes the addition of horizontal drains as an improvement solution. Simulations demonstrate that drains with a length equivalent to 60–70% of the width of the downstream slope can achieve dynamic safety coefficients that meet or exceed the minimum criteria required by the standards of the National Agency for Dams and Engineering and Construction Transfers (ANBT) for seismic conditions. We conclude that horizontal drainage is an effective solution to improve the stability of earth dams exposed to earthquakes. Résumé Cette étude évalue la stabilité du barrage en terre d’Oued El-Kola (Aïn Témouchent, Algérie), situé en zone sismique. À l’aide des outils numériques Geo-Slope (SEEP/W, QUAKE/W, SLOPE/W), une modélisation bidimensionnelle a été réalisée pour analyser la réponse statique et dynamique de l’ouvrage soumis à une charge sismique (accélérogramme de 0,25g). Les résultats montrent une instabilité importante et un risque de liquéfaction en l'absence de mesures correctives. L’étude propose l'ajout de drains horizontaux comme solution d’amélioration. Les simulations démontrent que des drains de longueur équivalente à 60–70 % de la largeur du talus aval permet d'atteindre des coefficients de sécurité dynamique conformes voire supérieurs aux critères minimaux exigées par les normes de l'agence nationale des barrages et transferts d'ingénierie et construction (ANBT) pour les conditions sismiques. Nous concluons que le drainage horizontal est une solution efficace pour améliorer la stabilité des barrages en terre exposés aux tremblements de terre. الملخص تُقيّم هذه الدراسة استقرار سد وادي الكولا الترابي )عين تموشنت، الجزائر(، الواقع في منطقة زلزالية. باستخدام أدوات GeoSlope الرقمية SEEP/W) ; SLOPE/W ; QUAKE/W (، أُجري نموذج ثنائي الأبعاد لتحليل الاستجابة الساكنة والديناميكية للهيكل المعرض لحمل زلزالي ( مقياس تسارع 0.25g). تُظهر النتائج عدم استقرار كبير وخطر التسييل في حال عدم اتخاذ إجراءات تصحيحية. تقترح الدراسة إضافة مصارف أفقية كح لّ للتحسين. تُظهر عمليات المحاكاة أن المصارف التي يبلغ طولها ما يعادل 60 - 70 % من عرض المنحدر السفلي يمكن أن تحقق معاملات أمان ديناميكية تُلبي أو تتجاوز الحد الأدنى من المعايير المطلوبة من قِبل الوكالة الوطنية للسدود ونقل الهندسة والبناء (ANBT) للظروف الزلزالية. نستخلص إثبات الصرف الأفقي أنه حل فعال لتعزيز استقرار السدود الترابية المعرضة للزلازل . 2025-06-11T00:00:00Z