Parcourir Doctorat (Physique) par date de publication
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Developpement mathematique et applications de la gravitation quantique a boucles
(2016-01-02)Loop Quantum gravity is a tentative theory to describe the quantum structure of spacetime at the Planck scale, the scale at which both general relativity and quantum theory manifest equally. The theory comes in three versions: ... -
تحسين الخصائص الميكانيكية و البيوحيوية للهيدروكسيأباتيت الطبيعي
(جامعة الإخوة منتوري قسنطينة, 2016-11-02)The main objective of this research is to study the hydroxyapatite (HA: Ca10(PO4)6(OH)2,) which was extracted from cortical bovine. This latter because of both its abundance and high purity may be considered as an exciting ... -
Réalisation de dispositifs microélectroniques à base de films organiques
(Universite des freres mentouri constantine, 2016-11-08)This thesis focuses on the realization of microelectronic devices based on organic materials. In order to develop next generation devices those have applications in the topic of solarphotovoltaic energy. Organic semiconductors ... -
Contribution à l’étude de l’implantation des ions de carbone dans le silicium
(Universite des freres mentouri constantine, 2016-11-17)In this work, we studied the ion implantation of carbon in silicon by simulation and experimentally. Several phenomena related to carbon implantation in Si (100) were simulated using two codes: Trim and Crystal ... -
Simulation numérique des transferts de chaleur et de masse en milieux poreux saturés de fluide dans différents espaces annulaires
(2016-11-27)The heat and mass transfer by laminar and steady natural convection in two-dimensional horizontal elliptical annular space filled with a fluid-saturated porous medium is analyzed numerically using our calculation code ... -
Transfert convectif dans une cavité totalement ou partiellement occupée par une matrice poreuse en ETL ou HETL
(2016-12-15)In this work, a numerical study of convective heat transfer in confined fluid and porous media was considered. The fluid flow is governed by the Navier–Stokes equations in the fluid region whereas the Darcy–Brinkman–Forchheimer ... -
Elaboration et étude de structures à base de couches minces de ZnO et de chalcogénures (CIS, CZTS) pour des applications photovoltaïques
(جامعة الإخوة منتوري قسنطينة, 2017-01-12)Among the most promising quaternary semiconductors for thin film solar cells fabrication is the Cu2ZnSnS4 (CZTS) material. Our choice in this thesis, to elaborate the CZTS thin films was related to the spray pyrolysis ... -
Etude de l’effet de l’addition et de la substitution dans les supraconducteurs a base de bismuth prépares par la méthode SOL-GEL
(جامعة الإخوة منتوري قسنطينة, 2017-01-29)Superconducting Bi2Sr2Ca1Cu2O8 ceramics samples have been prepared by Sol-Gel methods.The influences of the preparation conditions of compound oxide powder on structural and superconducting properties have been investigated. ... -
Etude parametrique de la combustion du methane enrichi a l’hydrogene
(جامعة الإخوة منتوري قسنطينة, 2017-02-22)Most of the energy produced and used in the world comes from fossil fuels. The combustion of these fuels cause the emission of significant quantities of greenhouse gases as well as different types of pollutants such as ... -
Interaction élastique dislocation – joints interphases dans des matériaux de structure cubique à faces centrees
(جامعة الإخوة منتوري قسنطينة, 2017-02-23)The majority of materials mechanical properties are due to the crystalline defects interactions, in particular the interaction between dislocations and interfaces. The interaction energy between a dislocation and an ... -
Optimisation et dimensionnement d’un système de dessalement performant
(جامعة الإخوة منتوري قسنطينة, 2017-02-23)"Solar distillation is an interesting solution for the supply of drinking water in arid and / or isolated areas. However, the production of conventional solar stills remains insufficient. Therefore, and in order to improve ... -
Approche numerique de la convection naturelle thermosolutale dans des enceintes fermées
(جامعة الإخوة منتوري قسنطينة, 2017-02-23)The problem related to thermosolutal natural laminar and permanent convection in horizontal annulus situated between two eccentric cylinders filled with Newtonian and incompressible binary fluid oriented at an arbitrary ... -
أمثلة زرع أيوني الأنتموان و الزرنيخ في السليكون
(جامعة الإخوة منتوري قسنطينة, 2017-03-12)In this work, several parameters related to the ion implantation of antimony or arsenic, in silicon substrates have been studied. This study was realized experimentally and by simulation using suitable programs. Theoretically, ... -
Préparation et étude électrique de poudres nanocristallines de ZnO pur et dopé par différents oxydes
(جامعة الإخوة منتوري قسنطينة, 2017-04-06)The goal of this thesis is to realize zinc oxide (ZnO) varistors doped with cobalt (Co) from nanosized powders, in order to explore the relationship between the reduction in particle size and the varistor effect. To do ... -
Elaboration et Caractérisation des Couches minces du Semiconducteur ZnO pures et dopées par le Cadmium
(جامعة الإخوة منتوري قسنطينة, 2017-05-02)The present work consists in the elaboration and characterization of the undoped and cadmium-doped ZnO with different concentrations of cadmium (Cd) (1, 2, 5 and 10% in weight) thin films in order to improve the structural ... -
Etude de création de centres colorés dans le fluorure de lithium (LIF) irradié par des ions lourds rapides
(جامعة الإخوة منتوري قسنطينة, 2017-05-22)Single crystals of LiF (Lithium Fluoride) were irradiated with ions lead of energy ranging between 144 and 840 MeV for electronic stopping power varying between 10 and 20 keV/nm and fluences between 109 and 1011 ions/cm2/s ... -
المشي العشواائي الكمي وخاصية الانتقال في بنى الجرافين
(جامعة الإخوة منتوري قسنطينة, 2017-05-23)We present numerical studies of quantum walks on C60 and related graphene structures, to investigate their transport properties. Also known as a honeycomb lattice, the lattice formed by carbon atoms in the graphene phase ... -
Étude des propriétés statiques et dynamiques du transistor à grille isolée Mosfet
(جامعة الإخوة منتوري قسنطينة, 2017-05-23)This thesis deals the study ofstatic and dynamic properties of the transistor gate isolated MOSFET. After having briefly recalled properties of the semiconductor material « Si », we have presented the structure and ... -
دراسة الخصائص الفـيزيـائـية للبورسلان المحضر إنطلاقا من مواد أولية محلية
(جامعة الإخوة منتوري قسنطينة, 2017-05-25)The aim of this work is to prepared porcelain with high mechanical and dielectric properties by using economical native raw materials without providing ideal high-cost conditions. The basic porcelain composition was selected ... -
Etude de potentiels polyatomiques par l’intégrale de chemin
(جامعة الإخوة منتوري قسنطينة, 2017-06-13)This work concerns a rigorous treatment by the Feynman path integral of a set containing four spherically symmetric quantum systems studied in the past by means of other ineffective methods. In the framework of ...
