The University of Souk Ahras DSpace repository

Home of the: research papers, communications, textbooks, books, chapters, Masters and PhD theses produced by the communities of researchers, lecturers and students affiliated with the University of Souk Ahras.

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Hydraulic and Pneumatic Systems
(2026-04-07) KHOUALDIA Tarek
This course handout provides a comprehensive introduction to hydraulic and pneumatic systems used in fluid power engineering. The document explains the fundamental principles of fluid mechanics, including flow regimes, Reynolds number, head loss, friction factors, and the Moody diagram. It also covers hydraulic filtration systems and emphasizes the importance of fluid cleanliness, contamination control, and filter efficiency in maintaining reliable hydraulic performance. In addition, the handout discusses pneumatic air quality and the treatment of compressed air through filters, dryers, and lubricators. The document further explores the operation and classification of pumps, compressors, hydraulic motors, and cylinders. It describes different types of positive displacement pumps such as gear, vane, screw, axial piston, and radial piston pumps, along with their applications and performance characteristics. The handout also explains hydraulic cylinders, including their construction, working principles, types, force calculations, cushioning systems, buckling analysis, and mounting methods. Practical engineering examples, formulas, comparative tables, and exercises are included throughout the chapters to support learning and application in industrial, aerospace, and automation systems.
Multi-Index Assessment of Hydrometeorological Droughts in Northeast Algeria: Sectoral K-means Analysis of Trends and Water Resource Impacts
(2026-04-18) Amarchi Amina; Lotfi Zeghadnia; Moncef Chabi; Hocine Amarchi
Drought poses significant challenges to water availability, agriculture, and socioeconomic stability in Northeast Algeria. This study delineates the region into North (Mediterranean), Center (semi-arid), and South (arid) sectors using K-Means clustering and assesses drought trends with SPI, RDI, and SDI from 1975–2021. Results indicate near-normal conditions in the North (SPI-mean = 0.00023, RDI-mean = 0.003), transitional drying in the Center (SPI-mean = 0.0007, RDI-mean = 0.0008), and severe aridification in the South (SPI-mean = -0.0004, RDI-mean = -0.0007). Significant drying trends were observed in Oum El Bouaghi (Z = -8.620, p < 0.0001) and Khenchela (Z = -6.357, p < 0.0001). SDI analysis revealed stable streamflow but short-term drought risks at Medjaz Amar and Zerdaza Dam. Strong correlations among indices, particularly RDI with SPI and SDI, highlight the South’s heightened vulnerability. These findings provide critical insights for policymakers to develop targeted drought mitigation strategies, such as enhanced water storage and efficient irrigation systems.
Programmation des machines-outils à commande numérique. Principes et exemples.
(2026-05-21) MAHFOUDI Farouk
The purpose of this course is to understand the operating principles of computer numerical control (CNC) machines, kinematic possibilities, control systems, measurement, and surface generation methods. It also teaches students how to write a simple numerical program in ISO language. Students will learn how to draft a machining process to produce a simple part. Furthermore, it enables them to acquire the core elements of the methodology for analyzing CNC program structures, as well as the main M, G, T, D, F, and S functions, and cycle names.
Moteur à combustion interne
(2025) Zerari Naziha
L'étude des moteurs à combustion interne est cruciale pour plusieurs raisons. Elle permet d'optimiser leur efficacité énergétique, ce qui entraîne une réduction de la consommation de carburant et des émissions de gaz polluants. De plus, cette connaissance permet de concevoir des moteurs plus performants et résistants, répondant aux exigences des secteurs tels que l'automobile, l'aviation et la production d'énergie. Une meilleure compréhension de ces moteurs est également essentielle pour répondre aux défis liés aux normes environnementales strictes et pour promouvoir l'innovation dans le domaine du développement durable. Enfin, maîtriser leur fonctionnement est indispensable pour assurer le diagnostic et la maintenance de ces moteurs dans différents secteurs industriels. L'objectif principal de ce papier est d'étudier le fonctionnement des moteurs à combustion interne, avec un focus particulier sur les moteurs alternatifs à combustion interne. Elle couvre les principes fondamentaux, la thermodynamique des cycles moteurs, ainsi que le cycle spécifique des moteurs diesel. De plus, elle examine la dynamique des moteurs alternatifs et évalue leurs performances et caractéristiques, offrant ainsi une analyse approfondie de leur efficacité, puissance et comportement.
مدخل الى قانون البيئة
(2026-04-28) بوكحيل حكيمة