• Upper Bounds for the Number of Limit Cycles for a Class of Polynomial Differential Systems 

  TALEB, Bouchra; KINA, Abdelkrim Supervisor (université Ghardaia, 2025)

  One of the main open problems in the theory of ordinary differential equations is the study of the existence and number of limit cycles, due to their fundamental role in under- standing the periodic behavior of dynamical ...
• Development of a Remote-Controlled Smart Greenhouse System Using IOT For Enhanced Climate and Resource Management In Semi-Arid 

  BEERIGHAID, Fatima Zahra; DADDOUCHE, Chaima; BENSEDDIK, Abdelouahab Supervisor (université Ghardaia, 2025)

  At the present time, with the great technological development that we are witnessing, it has become necessary to combine technology in daily life in modern societies, as technological developments advance daily and intervene ...
• Pour une contribution à l'amélioration des caractéristiques chimiques et mécaniques d’un béton à base de sables dunaire et ses fines 

  MADANI, Keltoum; BOUABDELLI, Amel; LAROUI, Abdelbasset Encadreur (université Ghardaia, 2025)

  This experimental study aimed to improve the chemical and mechanical properties of concrete using dune sand from southern Algeria (region of Aïn Salah). The characteristics of the raw materials were analyzed and several ...
• Étude comparative entre deux systèmes de cuisson réalisés et testés à l’URAER-CDER, Ghardaïa 

  Menad, Brahim; Yahia Cherif, Moussa; YETTOU, Fatiha Encadreur (université Ghardaia, 2025)

  According to research conducted at the URAER-CDER in Ghardaïa, two prototypes of solar cookers were designed and tested in order to evaluate their energy efficiency, ease of use, and their adaptability to the specific ...
• Effet de l’incorporation de la pâte de ciment recyclée sur les propriétés du mortier 

  Chitoura, Amal; GUENZOUL, Israa; Dehane, Sarra Encadreur (université Ghardaia, 2025)

  This study aims to evaluate the effect of partially replacing cement with recycled cement powder (RC), derived from improperly stored and prehydrated cement that was activated thermally, on the properties of mortars. ...
• Estimation de taux de la matière azoté dans un sable destiné au traitement des eaux usée. 

  BELKOU, NOUR ELHOUDA; BOUCHAREB, SELSABIL; BOUAMER, Khaira Encadrant (université Ghardaia, 2025)

  Nitrogen compounds, such as ammonium (NH4+), nitrite (NO2-) and nitrat (NO3-), are common environmental contaminants in water, particularly in groundwater and wastewater. These compounds pose a risk to public health and ...
• Etude expérimentale et modélisation des isothermes de sorption d’humidité et propriétés thermodynamique des variétés des maïs cultivées dans la région de Ghardaïa 

  HADJ MOHAMED, Zineb; ChAMKHA, Naima; DAOUD, Djamal Encadrant (université Ghardaia, 2025)

  This thesis analyzes the hygroscopic and thermodynamic properties of three maize varieties (Colonia, Kalassioul, Oasis) grown in the El Menia region, by studying their sorption isotherms to optimize drying and storage. ...
• Élimination d’un colorant textile (vert de malachite forme oxalate) par un matériau (MAGADIITE-Na) 

  Laouar, Abir; Oulad Kouider, Chaima Leila; K . Moulai, Encadrant (université Ghardaia, 2025)

  This research work is part of the valorization of microporous materials for the treatment of water contaminated by industrial dyes, particularly malachite green in its oxalate form. The study focused on magadiite, a ...
• Contribution a l’étude phytochimique de certaines plantes médicinales (Amaranthus sp)de la région de Ghardaia pour des applications 

  Ben Semoune, Fatima Zohra; Ben Semoune, Cherifa; LAGHOUITER, Oum Kelthoum Encadrant (université Ghardaia, 2025)

  This research focuses on the valorization of medicinal plants from the Ghardaia region for cosmetic purposes. The main objective is to study the phytochemical properties of amaranth (Amaranthus sp.) and develop a cosmetic ...
• Développement de solutions innovantes de séchage solaire adaptées aux fruits et légumes, en intégrant des méthodes de prétraitement et des séchoirs solaires optimisés 

  EL FATMI, Fatima Zahra; HAIMOUD, Arwa; DAOUD, Djamel Encadrant (2025)

  This study evaluated the impact of various chemical pretreatments (citric acid, ascorbic acid, NaCl, CaCl2, sucrose, glucose) and thermal pretreatments (blanching in hot water or steam) on the drying kinetics, quality, ...
• Développement et test d’un séchoir solaire indirect avec stockage d’énergie par matériau à changement de phase (MCP) pour la conservation des produits locaux en régions semi-arides 

  Ouddane, Manel; Bouchaala, Roumaissa; BENSEDDIK, Abdelouahab Encadreur (université Ghardaia, 2025)

  In regions like southern Algeria, where post-harvest losses of agricultural products are significant due to high humidity and lack of preservation infrastructure, this study introduces an innovative approach to indirect ...
• Étude et Conception d’un Système Hybride PVT Intégré dans l’Habitat 

  KADI, Mansour; TOUAFEK, Khaled Encadreur (université Ghardaia, 2025)

  Renewable energy applications in autonomous regions are numerous. They are characterized by the need to continuously meet energy needs. In our work, we studied the feasibility of supplying electrical and thermal energy ...
• Optimisation de la production d'une raffinerie Cas d’étude : Raffinerie d’Asbaâ Adrar Sonatrach 

  OUARFLI, Abdelbasset; DJERIFILI, Mohammed Abdelwahab; FIHAKHIR, Amine Mehdi Encadreur (université Ghardaia, 2025)

  This thesis aims to improve the production planning of the Asbaâ Adrar refinery, a vital facility for supplying petroleum products in southern and southwestern Algeria. Using a linear programming model, the thesis seeks ...
• Contribution à la maintenance prévisionnelle et corrective par le traitement d'huile des transformateurs de puissance HTB 

  HACINI, Mohamed Tahar; MERZOUG, Hocine Encadrant (université Ghardaia, 2025)

  Our thesis focuses on the treatment and improvement of power transformer (HTB) maintenance through insulating oil processing using modern techniques such as chromatography, gas analysis, and dielectric strength measurement. ...
• fractional stochastic differential problems with applications 

  Daoudi, Omar; Naimi, ABDELLOUAHAB Supervisor (université Ghardaia, 2025)

  In this memoir, we have investigated solutions to stochastic fractional differential equations (SFDE), encompassing existence and uniqueness analysis. We have presented fundamental concepts of fractional calculus (fractional ...
• Stabilité Exponentielle Globale des Réseaux de Neurones Récurrents Généralisés à Retards Discrets et Distribués 

  KECHAR, Youcef; Merabet, Brahim Encadreur (université Ghardaia, 2025)

  In this memoir, we deal with the problem of analyzing the global exponential stability of a class of recurrent neural networks (RNNs) with discrete and distributed mixed delays, let us consider the existence and uniqueness ...
• Modélisation d’élimination d’un colorant (bleu de méthylène) par un déchet agro-alimentaire 

  SALAHOUELHADJ, Lalla; BOUKRAA, Amina; BENCHEIKH, Salah Eddine Encadrant (université Ghardaia, 2025)

  This study falls within the framework of agricultural waste valorization, using date pedicels as a natural adsorbent material to remove industrial dyes, particularly methylene blue, known for its toxicity and ...
• Numerical Analysis of Mixed Convection in a Trapezoidal Cavity Filled with a Hybrid Nanofluid 

  Ouled Hadj Youcef, Amel Djemaa; BOUARAOUR, Kamel Supervisor (université Ghardaia, 2025)

  In this thesis, a two-dimensional numerical simulation was conducted to investigate mixed convection heat transfer in a trapezoidal cavity filled with a hybrid nanofluid. The system is characterized by a hot lower wall, ...
• Étude de l’extraction de Gossypium arboreum et de ses activités biologiques 

  Toum, Ikram; FERHI, Nihad chemes eddine; BABA ARBI, Ilyas Encadreur (université Ghardaia, 2025)

  Cette note traite d'une étude chimique et biologique des parties négligées de la plante de coton Gossypium arboreum, telles que les feuilles, les graines et les capsules, dans le but d'extraire et d'évaluer les composés ...
• Simulation du réseau de distribution d'eau potable (AEP) à l'aide d'EPANET Cas de la ville nouvelle de Meniaa 

  LEBCIR, MOHAMMED ABD ENNAFAA; LACHEHEB, Senna Encadreur (université Ghardaia, 2025)

  Ce travail vise la conception d’un réseau de distribution d’eau potable pour la nouvelle ville de la wilaya d’El Menia, située dans une région saharienne marquée par l’aridité, des ressources hydriques limitées et une ...

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