https://dspace.univ-ouargla.dz/jspui/handle/123456789/27611 2026-04-14T12:31:29Z https://dspace.univ-ouargla.dz/jspui/handle/123456789/27618 Titre: Cyclic voltammetry Studies of bis [5-phenylazo-2-hydroxybenzaldehyde]-4, 4′- diiminodiphenyl ether and its amine derivative Auteur(s): Tahar DOUADI; Tahar DOUADI; Ali DOUADI; Ali LOUNAS Résumé: The azoimine ligand, bis [5-phenylazo-2- ydroxybenzaldehyde] -4, 4′- diaminophenyl ether (2) was synthesized by reducing the imine group of the azoimine form bis[5- phenylazo-2- ydroxybenzaldehyde] -4,4′-diiminophenyl ether (1), conducted by the condensation of 5-phenylazo-2-hydroxybenzaldehyde and 4,4′(diamino-diphenyl) ether. The compounds (1) and (2) were characterized using elemental analyses, IR, UV-Vis spectroscopy, 1H NMR, 13C NMR and mass spectra. The electrochemical study has been investigated by cyclic voltammetry technique Description: Annales des Sciences et Technologie 2015-10-01T00:00:00Z https://dspace.univ-ouargla.dz/jspui/handle/123456789/27616 Titre: Modélisation et simulation de la diffusion de l’antimoine dans le germanium Auteur(s): Abdelkader SOUIGAT; Kamal Eddine AIADI Résumé: Germanium is a good candidate to replace silicon in advanced microelectronic devices, due to its high charge carriers mobility. The purpose of this work is to know better the phenomenon of dopant diffusion in germanium by modeling and simulating the antimony diffusion in germanium, which is essential to perform efficient circuits. After the modelling of the diffusion using the vacancy mechanism, taking account of the antimony effective diffusion coefficient dependence of the square and the cube of the free electrons concentration and the numerical solution of partial differential equation of the second Fick law by finite differences method, we were able to simulate the Sb experimental profiles at temperature700°C. Which shows the contribution of doubly negatively charged (2-) and triply negatively charged (3-) vacancies in this diffusion, where the contributions ratio is β=11.5 Description: Annales des Sciences et Technologie 2015-10-01T00:00:00Z https://dspace.univ-ouargla.dz/jspui/handle/123456789/27615 Titre: D-Dimensional Statistical Mechanics in Fractional Classical and Quantum Mechanics Auteur(s): Zineb KORICHI; Mohammed Tayeb MEFTAH Résumé: In this work, we focus our study on some systems in statistical mechanics based on the fractional classical and quantum mechanics in any positive spatial dimension D. At the first stage we present the thermodynamical properties of the classical ideal gas and the system of N classical oscillators. In each case, the Hamiltonian exhibits fractional exponents of the phase space (position and momentum). At the second stage, in the context of the fractional quantum mechanics, we have studied the Bose-Einstein statistics with the related problem of the condensation and the Fermi-Dirac. Description: Annales des Sciences et Technologie 2015-10-01T00:00:00Z https://dspace.univ-ouargla.dz/jspui/handle/123456789/27614 Titre: Etude d'un système photovoltaïque de production d'énergie à base d'hydrogène vert Auteur(s): Ahmed DJAFOUR; Mohamed Salah AIDA; Boubekeur AZOUI Résumé: The appearance of new concepts of decentralized electricity generation and the development of renewable sources are attracting much interest for techniques of energy storage. Renewable sources are the best candidates, but the intermittent of their production needs to find effective means of storing and protecting the environment. A system coupling a photovoltaic (PV) array and an electrolyzer is used to store electricity by means of a storage form of gas. This paper presents the results of sizing a system of hydrogen production obtained through an electrolyzer, powered by photovoltaic solar modules installed in Ouargla, to meet the needs of hydrogen for a fuel cell of type, PEMFC. Sizing a photovoltaic system for a given site requires knowledge of the solar radiation of the latter. Many localities in Algeria don't have such data or radiation data are not sufficiently representative. In this study we developed a calculation program for determining the global radiation received by a surface inclined. And we have established a flowchart that helps to size the main components of the installation to produce hydrogen by introducing the necessary technical characteristics of system components and the calculated values of global radiation for the site of Ouargla and electric energy needs of the user Description: Annales des Sciences et Technologie 2015-10-01T00:00:00Z