DSpace 7

DSpace is the world leading open source repository platform that enables organisations to:

  • easily ingest documents, audio, video, datasets and their corresponding Dublin Core metadata
  • open up this content to local and global audiences, thanks to the OAI-PMH interface and Google Scholar optimizations
  • issue permanent urls and trustworthy identifiers, including optional integrations with handle.net and DataCite DOI

Join an international community of leading institutions using DSpace.

The test user accounts below have their password set to the name of this software in lowercase.

  • Demo Site Administrator = dspacedemo+admin@gmail.com
  • Demo Community Administrator = dspacedemo+commadmin@gmail.com
  • Demo Collection Administrator = dspacedemo+colladmin@gmail.com
  • Demo Submitter = dspacedemo+submit@gmail.com
Photo by @inspiredimages
 

Communities in DSpace

Select a community to browse its collections.

Recent Submissions

Thumbnail Image
Item
دور القوة الملزمة لعقد النقل البحري في مواجهة الظروف غير المتوقعة
(University of Tlemcen, 2025-06-18) Bemmerzoug Mohamed Elamine
إن هدف القانون هو خلق التوازن العقدي القائم بين أحكام القوة الملزمة لعقد النقل البحري من جهة وبين مجابهة الأحداث غير المتوقعة التي قد تعرقل مسار هذا العقد أثناء تنفيذه من جهة ثانية . يظهر هذا التوازن في وضع شروط في العقد عند إبرامه تتجلى خصوصا في شرطي القوة القاهرة وإعادة التفاوض للمحافظة على العلاقة العقدية تحقيقا لمصلحة الأطراف وخدمة للإقتصاد فتكون القوة الملزمة للعقد بمثابة المسعف عندما يتعلق الأمر بظروف غير متوقعة كوسيلة لتحقيق التوازن العقدي وبقاء العقد قائما
Thumbnail Image
Item
Thermodynamic and thermophysical properties of chemicals of industrial and environmental interest Measurement and modeling
(University of Tlemcen, 2024-04-20) Belhadj ,Djazia
The present thesis is part of a general program of research concerning the thermophysical and thermodynamic properties of binary mixtures containing molecules of industrial and environmental interest. The first part presents the experimental results of densities, speeds of sound and refractive indices measurements of twelve (12) binary mixtures at different temperatures and at pressure of 0.1 MPa. The measured data has been utilized to compute isentropic compressibility, intermolecular free length, specific acoustic impedance, relative association, relaxation strength and Rao's molar sound function. The excess/deviation properties such as excess molar volume, deviations in isentropic compressibility, deviations in intermolecular free length, deviations in acoustic impedance, deviations in speed of sound and deviation of refractive index were also calculated for all studied mixtures under the same experimental conditions. The correlation of excess properties was made by help of the Redlich-Kister polynomial equation. The second part contains vapor-liquid equilibrium data of three binary mixtures measured by means of a static apparatus at several temperatures. The obtained results were correlated with the Antoine equation. From these data, the excess Gibbs function and the vapor phase composition were evaluated using the Barker’s method. The activity coefficients of the components in binary mixtures were also estimated. Additionally, the experimental data were correlated by using three activity coefficient models NRTL, UNIQUAC and Modified UNIFAC (Dortmund).
Thumbnail Image
Item
Creation of an automatic summary tool for arabic texts
(University of Tlemcen, 2024-09-30) Taleb Ben Diab ,Bashir
This thesis presents an advanced Arabic text summarization system built by fine tuning a T5-base transformer model on the AGS-Corpus, a curated Arabic summarization dataset. The model effectively handles the language’s rich morphology, diverse dialects, and complex syntax. Evaluation using BERTScore and ROUGE shows that the system generates high-quality summaries closely aligned with human references in content, fluency, and semantic similarity. To improve accessibility, the system is deployed as a user-friendly web application using Streamlit, enabling real-time summarization for non-technical users. Future work includes expanding the dataset to include more dialects and exploring alternative architectures like BART or GPT to further enhance performance, especially on complex or lengthy texts
Thumbnail Image
Item
Dimensionnement et Optimisation d’un Parc Éolien au sud Algérien
(Univertsity of Tlemcen, 2025-05-13) Merad Boudia, El Mahdi
Notre étude porte sur le dimensionnement et l’optimisation d’un parc éolien au sud Algérien cas de Tindouf. Le manque aigu de stations météorologiques, entraîne une insuffisance dans l’évaluation des ressources en énergie éolienne. L’utilisation du logiciel QGIS, permet de convertir les atlas des vents obtenus à partir de Global Wind Atlas en données numériques, pour évaluer les divers paramètres du gisement éolien à des hauteurs différentes. La différence entre les résultats obtenus par les mesures de la station et celles estimées par cette méthode ne dépasse pas 4%. Ainsi on obtient finalement les coordonnées des trois sites les plus propices pour de futures installations éoliennes. Six éoliennes ont été employées pour dimensionner des parcs éoliens de capacité 10, 20 et 30 mégawatts. Nous avons sélectionné les aérogénérateurs les plus adaptés en fonction des critères énergétiques et économiques, afin d'obtenir un rendement énergétique optimal tout en minimisant les coûts.
Thumbnail Image
Item
Modeling of a LIBS plasma emitted by organic components under Martian conditions with the aim of search for life in Mars
(University of Tlemcen, 2025-06-21) Benbaier,Kouider
This thesis focuses on modeling Laser-Induced Breakdown Spectroscopy (LIBS) plasma under Martian conditions. The theoretical framework investigates the interaction of nanosecond laser pulses with a solid organic target (graphite) in a Martian-like environment, specifically involving carbon dioxide (CO2) and helium (He) gases. A three-temperature (3T) Eulerian radiation model incorporating non-local thermodynamic equilibrium (NLTE) conditions is employed to capture the complex plasma dynamics during LIBS, taking into account the mixing between the expanding plasma plume and the surrounding gas. The study aims to provide a detailed understanding of laser ablation and plasma formation, with particular attention to the effects of laser irradiance and ambient gas pressure. The laser parameters used in the model replicate those of the ChemCam and SuperCam instruments. The work is limited to single-pulse excitation; post-ablation cavity effects are therefore not considered. Additionally, the thesis examines the impact of laser focusing conditions and ambient pressure ranging from 3 to 9 mbar (representative of Martian conditions) and up to 1000 mbar (Earth-like conditions) on key plasma parameters. The analysis is based on high-fidelity simulations performed using the open-source radiation-hydrodynamics code FLASH, which was used to calculate electron and ion temperatures, electron and ion number densities, and fluid velocities within the plasma.