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    دور متابعة البرامج السياسية للفضائيات الجزائرية الخاصة في نشر الثقافة السياسية لدى الشباب الجزائري دراسة ميدانية على عينة من طلبة جامعة سكيكدة

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    RESUME : Summary of the study in English University: Mohamed Kheidar University - Biskra Faculty: Faculty of Social Sciences and Humanities Department: Department of Social Sciences Speciality: Specialization in the sociology of communication and public relations. theme: Monitoring the political programs of private satellite channels and its role in the dissemination of political culture in Algerian society A field study on a sample of university students - University of Skikda. Number of Chapters: Seven Chapters number of pages:334 presented by the student: Hamadi Fathi Under the direction of Prof. Dr.:Abdelaali Debla This study aimed to know the role of the follow-up of the political programs of the Algerian private satellite channels in the development of the political culture of the students of the University of Skikda with its three cognitive dimensions, the dimension of the values, the behavioral dimension, etc. by studying the habits and habits of students following the political programs of Algerian private satellite channels, the style and motivations behind it and the extent of the credibility of the programs The political aspect of Algerian private satellite channels among the sample of study and its relationship with the level of political culture they have, and this through a field study of a sample of students from the University of Skikda. The study was divided into two parts: through which the contributions and ideas of the different theories concerned with the subject were put forward, while identifying and controlling its procedural concepts, as well as taking note of the determinants and results of the study variables, and presenting the results of previous studies. As for the field part, it contained a presentation on the study community, the sample that was included in the research, the methodology used and the tools used in the collection of information and data, and a statistical analysis of the study variables was presented during it. In the light of hypotheses, study objectives: This study aims to:previous studies and explanatory theories - Demonstrate students' interest in political issues. - He revealed how much students rely on the political programs of private satellite channels to understand and analyze what is happening in terms of national and international political events. - Identify the cognitive, moral (values) and behavioral effects of the political programs of private satellite channels on students as the most important segment of Algerian society. - Know the relationship between the quantity and size of exposure to political programs on private satellite channels and the level of political culture of the Algerian student. - Know the relationship between the motivations and reasons for following the political programs of private satellite channels and the level of political culture of the Algerian student. - Know the relationship between the credibility of the political programs of private satellite channels and the level of political culture of the Algerian student. Study questions: The study of this subject was based on the following lines of research: The main question of the study: What is the role of the follow-up of the political programs of the Algerian private satellite channels in the diffusion of the political culture of the Algerian youth in its three dimensions: political knowledge, political values and political participation. - Accordingly, the problem of the study is determined by answering the following questions: - Accordingly, the problem of the study is determined by answering the following questions: - What are the habits and monitoring patterns of Algerian youth on private satellite channels? - What are the main reasons and motivations behind listening to Algerian private satellite channels? - What is the credibility of the political programs of the private satellite channels with the Algerian youth? - Is there a statistically significant relationship between the reasons and motivations for following the political programs of private satellite channels and the level of political culture of Algerian youth? - Is there a statistically significant relationship between the credibility of the political programs of private satellite channels and the level of political culture of Algerian youth? - Are there statistically significant differences in the level of political culture of Algerian youth due to the rate and volume of monitoring of political programs by private satellite channels? - Are there statistically significant differences in the level of political culture of Algerian youth due to the variable (sex, level of studies and scientific specialization)? Study approach: The study relied on the analytical descriptive approach, which was applied to a sample of 487 students, where data was collected through a questionnaire form and then statistically analyzed to answer the questions of the study. The most important results of the study: - There is a statistically significant correlation between the habits and habits of following the political programs of Algerian private satellite channels and the level of political culture in its three dimensions for the Algerian student. - There is a correlation between the credibility of the political programs of private Algerian satellite channels and the level of political culture of the individuals in the study sample. - There are statistically significant differences in the level of political culture in its three dimensions due to the variables of the educational level variable. - There are statistically significant differences in the level of political culture in its three dimensions due to the variables of the scientific specialization variable. There are no statistically significant differences in the level of political culture in its three dimensions due to the variables of the gender variabl

    Analyse et évaluation de performances de systèmes de files d'attente avec feedback de clients

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    L’objectif principal de cette thèse est d’analyser différents systèmes de files d’attente avec Bernoulli feedback lorsque la probabilité de ce dernier phénomène dépend du nombre de clients dans le système. Dans un premier temps, nous considérons une file d’attente M/M/1 avec Bernoulli feedback, nous analysons un cas particulier d’entre eux. Dans un deuxième temps, nous considérons l’estimation paramétrique des caractéristiques de la file d’attente M/M/1/N avec Bernoulli feedback. Une étude de simulation a été réalisée dans l’objectif d’analyser l’effet de l’estimation des paramètres de départ du système d’attente en question sur les propriétés statistiques de ses estimateurs de mesure de performance obtenue via la méthode plug-in. Ensuite, nous analysons le système de file d’attente GI/GI/1 avec les commentaires de Bernoulli. Nous avons eu recours à la techniquede simulation d’événements discrets. Des analyses numériques et graphiques sont effectuées pour montrer l’effet de la distribution des temps d’inter-arrivées, la distribution des temps de service, la probabilité de Feedback, et l’intensité du trafic sur les caractéristiques stationnaires du système en question et nous ont permis de tirer des conclusions importantes sur le comportement de ces caractéristiques.o

    Numerical analysis of the mechanical behavior of geosynthetic reinforced stone columns in soft soils

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    Soft soils, characterized by high compressibility and low shear strength, present significant challenges for infrastructure construction, necessitating innovative soil improvement techniques. Among these, geosyntheticencased stone columns (GESC) have emerged as a highly effective solution. This thesis explores the mechanical behavior of GESC in soft soils through advanced three-dimensional numerical analyses using Plaxis 3D, aiming to enhance our understanding and optimize design methods for infrastructure projects. The first part of the study focuses on optimizing ground improvement with encased stone columns through a detailed 3D numerical analysis in very soft clay. Different types of columns were studied, including short and floating columns, ordinary stone columns, and geosynthetic-encased stone columns within a unit cell model. The investigation demonstrates the superior performance of geosynthetic encasement in reducing bulging and settlement compared to ordinary stone columns. The results emphasize the importance of considering realistic installation effects, highlighting how geosynthetic encasement significantly improves performance by preventing lateral expansion and maintaining structural integrity. The second part of the study delves into the advanced 3D modeling of a group of geosynthetic-encased stone columns in soft clay beneath embankments. Using Plaxis 3D software, this analysis evaluates the installation effects using a realistic lateral expansion method alongside the effects of geosynthetic reinforcement. The simulations reveal that geosynthetic encasement, combined with realistic installation methods, substantially enhances the load-bearing capacity and stability of stone columns. The findings validate the effectiveness of the lateral expansion method for simulating installation effects, showing that geosynthetic encasement greatly improves the performance of stone columns under various loading conditions. This thesis significantly advances the understanding of GESC behavior in soft soils, offering practical guidelines for designing more resilient and efficient infrastructure. The findings emphasize the necessity of incorporating realistic installation effects and a comprehensive range of parameters in design practices to achieve optimal performance

    Durability of stabilized earth mortars

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    Throughout ancient times, earth mortar was a fundamental construction material across various civilizations due to its widespread availability, cost-effectiveness, and advantageous thermal comfort characteristics. Today, amidst increasing global concerns such as escalating energy demands and heightened carbon dioxide emissions, the study of earth-based construction methods is gaining renewed relevance. This study aims to optimize the formulation of earth mortar, a fundamental material in traditional earthen construction, through a systematic approach. Particular emphasis is placed on evaluating its mechanical, physical, and durability properties to enhance its performance in contemporary sustainable building practices. Central to this methodology is the exploration of date palm ash (DPA) as a potential additive to improve the performance of earth mortar. To scrutinize the effects of DPA on earth mortar, the study involved preparing samples incorporating lime stabilization alongside varying doses of DPA, ranging from 0% to 10% of the binder. Experimental results demonstrate that incorporating DPA significantly enhances earth mortar properties. Optimal formulations containing 6% DPA exhibited a 40% reduction in linear shrinkage compared to the reference mixture and an 83.4% increase in elastic modulus. In chemical durability tests, this 6% DPA formulation notably improved resistance to aggressive agents, performing well against sodium sulfate and hydrochloric acid, though sulfuric acid presented the most significant challenge. Under accelerated carbonation, the 6% DPA formulation exhibited increased compressive strength and a stable mass gain. Moreover, DPA improved physical and durability properties. SEM and EDX analyses revealed that DPA reduces voids between earth mortar particles and increases C-S-H content, which supports the observed improvements in overall performance. The enhanced properties of earth mortar with DPA supplementation offer notable advantages for sustainable construction. DPA mitigates shrinkage and boosts mechanical strength. Additionally, this approach supports environmental sustainability by effectively repurposing date palm cultivation byproducts, reducing waste, and promoting a circular econom

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