http://dspace.centre-univ-mila.dz/jspui/handle/123456789/15 2026-11-02T15:43:21Z 2026-11-02T15:43:21Z Assia, Derbouche http://dspace.centre-univ-mila.dz/jspui/handle/123456789/4969 2026-10-08T09:45:42Z 2026-10-01T00:00:00Z

Titre: Control, synchronization, and anti-synchronization of different types of dynamical systems Auteur(s): Assia, Derbouche Résumé: The study of chaos control and synchronization has made significant progress over the past few decades. It is due to their use in various sectors such as communication protection, biological systems, and, more recently, in the epidemiological field that their scope is so broad. Thus, we have presented various control techniques as well as different forms of synchronization. In this work, we aim To attain complete synchronization and anti-synchronization of the SIR model, various control methods will be implemented, including active control, aptive control, backstepping, and sliding mode. Next, we conduct a comparative analysis of these methods to identify the most effective one among them. Description: Le contrôle et la synchronisation du chaos a considérablement avancé au cours des dernières décennies. C’est en raison de leur emploi dans divers domaines, tels que la sécurisation des communications, les Systèmes biologiques et, plus récemment, dans le domaine épidémiologique que leur portée est si large. Ainsi, nous avons exposé diverses techniques de contrôle ainsi que différentes formes de synchronisation.Dans ce travail, nous visons à effectuer la synchronisation complète et l’anti-synchronisation du modèle SIR en mettant en oeuvre diverses méthodes de contrôle comme le contrôle actif, adaptatif, backstepping et le mode glissant. Ensuite, nous procédons à une analyse comparative de ces méthodes pour identifier la plus efficace parmi elles.

2026-10-01T00:00:00Z شهيرة, علوان http://dspace.centre-univ-mila.dz/jspui/handle/123456789/4942 2026-10-04T10:31:19Z 2026-06-01T00:00:00Z

Titre: دو ر بطاقة الأداء المتوازن المستدام في تحقيق مقومات الجامعة المستدامة Auteur(s): شهيرة, علوان Résumé: This study aims to explore the role of the Sustainable Balanced Scorecard (SBSC) in achieving the pillars of a sustainable university, while highlighting the mediating role of Green Organizational Culture in Algerian higher education institutions. To this end, a conceptual framework was adopted that links the dimensions of the Sustainable Balanced Scorecard to the pillars of the sustainable university, with green organizational culture considered as a mediating variable that explains how organizational behaviors of relevant stakeholders are directed to ensure the effective implementation of strategic orientations. The study population comprised 6,334 permanent faculty members affiliated with 34 Algerian higher education institutions included in the 2025 THE Impact Rankings. To ensure geographical representativeness, a primary cluster sampling technique was mployed, whereby the sample included institutions from the eastern region (El Oued University, Khenchela University, Oum El Bouaghi University, and Mila University Center), the central region (University of Algiers 3, the Higher School of Commerce, and the Higher School of Commercial Studies), and the western region (Djillali Liabes University of Sidi Bel Abbès and Naâma University Center). This process resulted in a final sample of 441 permanent faculty members. The study adopted a quantitative research approach through the design of a questionnaire for data collection. Validity and reliability tests were conducted, and data suitability for statistical analysis was verified. Descriptive statistical analyses were performed using SPSS, while the onceptual model and research hypotheses were tested using Partial Least Squares Structural Equation odeling (PLS-SEM) via the SEMinR software. Both the measurement and structural models were assessed, convergent and discriminant validity were examined, and direct as well as mediating relationships were tested.The study results showed that the measurement instruments demonstrated high levels of validity and reliability, and that the data were suitable for statistical analysis. It was also found that the dimensions of the Sustainable Balanced Scorecard have a positive and significant effect on the components of the sustainable university, with variations in effect strength across dimensions, the strongest effect observed on the green organizational culture and research sustainability, and the weakest effect on community engagement. The results further confirmed the effective mediating role of the green organizational culture in enhancing this relationship, particularly regarding the sustainability of campus operations and community engagement, thereby highlighting the effectiveness of the Sustainable Balanced Scorecard and the green organizational culture in supporting the sustainability of higher education institutions

2026-06-01T00:00:00Z تسنيم, عثامنية http://dspace.centre-univ-mila.dz/jspui/handle/123456789/4854 2026-09-17T10:34:06Z 2026-07-01T00:00:00Z

Titre: متطلبات تبني إعادة الهندسة وأثرها على المثلث الاستراتيجي لقطاع الاتصالات في الجزا ئر دراسة ميدانية بشركات الاتصالات الجزائرية Auteur(s): تسنيم, عثامنية Résumé: هدفت هذه الد را سة إلى استكشاف أثر متطلبات تبني مدخل إعادة الهندسة على المثلث الاسترا تيجي )الجودة، التكلفة، الوقت( داخل شركات الاتصالات الجز ا ئرية. اعتمدت الد را سة على معالجة الجوانب النظرية لإعادة الهندسة، وتحليل واقع قطاع الاتصالات في الجزا ئر، وإجرا ء د را سة ميدانية شملت جمع البيانات عبر استبيانات من عينة ممثلة للقطاع وتحليلها باستخدام برنامج التحليل الإحصائي SPSS في نسخته 26 ،وبرنامج AMOS في نسخته 23 . أظهرت النتائج أن شركات الاتصالات الجز ا زئرية تتمتع بمستوى مرتفع نسبيًا من تبني متطلبات إعادة الهندسة على المستوياتالتكنولوجية،البشرية،التنظيمية والفنية، وأن هذه المتطلبات تؤثر بشكل إيجابي ودال إحصائياً على أبعاد المثلث الاست ا رتيجي. كما بينت النتائج أن المتطلبات التكنولوجية تعد الأكثر تأثيراً ، تليها المتطلبات الفنية والبشرية، فيما جاءت المتطلبات التنظيمية الأقل تأثيراً ، مما يشير إلى الحاجة لمزيد من المرونة التنظيمية. وأشارت الد را سة إلى أن تحقيق التوازن بين أبعاد المثلث الاسترا تيجي يعزز القدرة التنافسية للشركات، ويساعدها على تحسين جودة الخدمات، تقليل التكاليف وتسريع الاستجابة لمتطلبات السوق. Description: This study aims to assess the impact of the requirements associated with the adoption of the Business Process Reengineering (BPR) approach on the strategic triangle—namely quality, cost, and time—within Algerian telecommunications companies. The research is grounded in an in-depth examination of the theoretical foundations of reengineering, an analysis of the current state of the telecommunications sector in Algeria, and an empirical investigation based on data collected through questionnaires administered to a representative sample of the sector. The collected data were processed using SPSS (version 26) and AMOS (version 23) software.The results indicate that Algerian telecommunications companies demonstrate a relatively high level of adoption of reengineering requirements at the technological, human, organizational, and technical levels. Moreover, the findings confirm a positive and statistically significant effect of these requirements on the various dimensions of the strategic triangle. Technological requirements emerge as the most influential, followed by technical and human requirements, whereas organizational requirements exhibit the weakest impact, underscoring the need to enhance organizational flexibility. Ultimately, the study concludes that achieving a balance among the dimensions of the strategic triangle represents a key driver of corporate competitiveness, as it contributes to improving service quality, reducing costs, and accelerating responsiveness to market demands.

2026-07-01T00:00:00Z Sara, SAIDANE http://dspace.centre-univ-mila.dz/jspui/handle/123456789/4853 2026-09-17T10:25:12Z 2026-07-01T00:00:00Z

Titre: Solving a class of multidimensional Volterra integral and integro-differential equations Auteur(s): Sara, SAIDANE Résumé: تتناول هذه الأطروحة دراسة منهج عددي لحل المعادلات التكاملية والتكاملية-التفاضلية الجزئية من نوع فولتيرا ثنائية البعد الخطية مع تأخير. تم تطوير طريقة التجميع المعتمدة على كثيرات حدود تايلور لتقريب الحل على (Collocation method) مجال زماني مكاني مُقسَّم إلى أجزاء. يتيح المخطط المقترح حساب مع املات التقريب بطريقة تكرارية دون الحاجة إلى حل أنظمة كبيرة من المعادلات الجبرية. كما يتم إثبات التقارب الشامل للطريقةنظريًاتحتافتراضات مناسبة لانتظام المعطيات. وتعرض أمثلة عددية لإبراز كفاءة الطريقة المقترحة ودقتها في تقريب الحلول Description: This thesis studies a numerical approach for solving linear two-dimensional delay partialaVolterra integro-differential equations. A collocation method based on Taylor polynomials is developed to approximate the solution on a spatial domain defined piecewise. The proposed scheme computes the approximation coefficients iteratively without the need to solve large systems of algebraic equations. A theoretical analysis establishes the global convergence of the method under appropriate smoothness assumptions. Numerical examples are presented to demonstrate the efficiency and accuracy of the proposed method.

2026-07-01T00:00:00Z