Browsing Conférences, Colloques, Séminaires, Symposiums by Title
Now showing items 4-23 of 784
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A COMPARATIVE STUDY OF Al-5%Co-2%Ti AND Al-30%Co-2%Ti ALLOY SYSTEMS
(Université des Frères Mentouri Constantine, 2013-12-16)The present work focuses on the structural evolution and properties of alloy hardness in Al-5%Co-2%Ti and Al-30%Co-2%Ti prepared by high-frequency fusion (HF) after cold compaction.Both alloys were characterized by optical ... -
A COMPARATIVE STUDY OF I–V AND C–V CHARACTERISTICS OF SCHOTTKY GATE AlGaN/GaN HEMTs
(Université des Frères Mentouri Constantine, 2013-12-16)In this work we investigate AlGaN/GaN HEMTs structures grown by Low Pressure Metal Organic Chemical Vapour Depostion on SiC substrate. The aim of our work is to study the effect of variation in aluminium (Al) composition ... -
A Neural Network MPPT For Photovoltaic Grid Connected System
(Université des Frères Mentouri Constantine, 2013-02-17)A photovoltaic (PV) output power depends nonlinearly on the climatic changes such au solar irradiation and temperature, there exists a unique maximum power point (MPP). Thus, a maximum power point tracking (MPPT) controller ... -
A NEW HIGHER ORDER SHEAR AND NORMAL DEFORMATION THEORY FOR BENDING ANALYSIS OF ADVANCED COMPOSITE PLATES
(Université des Frères Mentouri Constantine, 2016-10-31)In this work, a higher-order theory including the stretching effect is developed for the static analysis of advanced composite plates such as functionally graded plates. The number of unknown functions involved in the ... -
A NON COMMUTATIVE APPROACH TO COSMIC STRINGS
(Université des Frères Mentouri Constantine, 2013-12-16)A Cosmic string model based on Seiberg-Witten non commutative geometry is constructed. Black holes solutions are determined and the Hawking radiation temperature near the horizon is also derived -
A PARAMETRIC STUDY OF A HEAT RECOVERY ADSORPTION COOLING MACHINE
(Université des Frères Mentouri Constantine, 2013-12-16)In this paper, a detailed thermodynamic and parametric analysis of simple and regenerative cycle of an adsorptive machine using the activated carbon AC-35/methanol as adsorbent/adsorbate pair is given, where the ... -
A QUANTUM CHEMICAL CALCULATION (DFT) : 1-(4-NITRPHENYLOIMINO) -1 (PHENYLHYDRAZONO) - PROPAN-2-ONE AS CORROSION INHIBITOR FOR MILD STEEL IN ACIDIC MEDIA
(Université des Frères Mentouri Constantine, 2016-10-31)Quantum chemical calculations based on DFT method were performed on azomethine compound: PhN=N-C (COCH3) =NC6H4Y {Y = NO2 (SB1)}used as corrosion inhibitor for mild steei in acid media to determine the relationship between ... -
A SPUTTERED ZnO THIN FILMS AS A TCO
(Université des Frères Mentouri Constantine, 2013-12-16)We studied the structural and optical properties such as the crystal structure , the optical gap ,absorption and transmittance coefficient, grain size. And resistivity of ZnO thin films grown by sputtering technique -
A STUDY OF THE BAND GAP ENERGY AND ELECTRONIC CHARGE DENSITY OF GaNxAs1-x ALLOYS FROM FIRST-PRINCIPLES CALCULATIONS
(Université des Frères Mentouri Constantine, 2013-12-16)In order to investigate the electronic properties of zinc-blende GaNxAs1-x alloys. Full potential-linearized augmented plane wave (FP-LAPW) calculations based on density functional theory (DFT) are done. Our estimation ... -
A Study of the structural and electronic properties of LaX (X=Se, Te ) in two phases B1, B2 ander high pressure
(Université des Frères Mentouri Constantine, 2016-12-15)The objective of this work is a study of the structural properties (lattice parameters, total energy, bulk modulus) and electronic properties (band structure, density of states) of rare earth monochalcogenides LaX (X=Se, ... -
AB INITIO CALCULATIONS FOR THE BISMUTH SODIUM TITANATE (Bi0.5 Na0.5)TiO3
(Université des Frères Mentouri Constantine, 2013-12-16)Ab initio studies of structuraland electronic properties of Bismuth sodium titanate (Bi0.5Na0.5)TiO3 (abbreviated as BNT) arepresented using pseudo-potential plane wave method within the density functional theory (DFT) ... -
AB INITIO STUDY OF BULK AND SURFACE PROPERTIES OF CoPt L10 ALLOY
(Université des Frères Mentouri Constantine, 2013-12-16)The CoPt binary alloy, due to its tetragonal L10 structure, shows a strong magnetic anisotropy, and is a good candidate for ultra high density informatics storage device. We present in this work ab initio calculations ... -
AB-INITIO INVESTIGATION OF STRUCTURAL, ELECTRONIC AND MAGNETIC PROPERTIES FOR PHASES OF ZNO AND FE-DOPED ZNO
(Université des Frères Mentouri Constantine, 2013-12-16)Complex density-functional theory (DFT) calculations of structural, electronic and magnetic properties for the three phases: wurtzite (B4), zincblende (B3) and rocksalt (B1) of pure ZnO compound and Fe doped ZnO with ... -
Ab-INITIO STUDY OF Fe-Ti ALLOYS FOR HIGH CAPACITY HYDROGEN STORAGE
(Université des Frères Mentouri Constantine, 2013-12-16)This work presents a preliminary study of the structural and electronic properties of Fe, Ti, H and their alloys by means of the density functional theory (DFT) pseudopotential code SIESTA (Spanish Initiative for Electronic ... -
AB-INITIO STUDY OF THE STRUCTURAL, ELECTRONIC AND ELASTIC PROPERTIES OF EuX (X = Se, Te) COMPOUNDS IN CUBIC STRUCTURES
(Université des Frères Mentouri Constantine, 2016-10-31)The strurural, electronic and elastic properties of rare-earth monochalcogenides EuX (X=Se, Te) were investigated with the full-potential-linearized-augmented plane wave (FP-LAPW) based on density functional theory (DFT). ... -
ADSORPTION KINETICS AT DIFFERENT CONCENTRATIONS OF Cu (II) ONTO LOCAL MARL
(Université des Frères Mentouri Constantine, 2016-10-31)Copper is known to be commonly used heavy metals. This metal, which find many useful applications in our life, are very harmful if they are discharged into natural water resources and many pose finally a serious health ... -
ADVANCES IN WATER TREATMENT BY ADSORPTION TECHNOLOGY: APPLICATION TO THE REMEDIATION OF POLLUTED WATER BY ANIONIC DRUG
(Université des Frères Mentouri Constantine, 2016-10-31)Diclofenac sodium (DS) is considered as priority anti-inflammatory pollutant because of its presence in water. In this paper, we addressed the issue of using organo-K10 montmorillonite as adsorbent of DS to reduce its ... -
AIR QUALITY ASSESSMENT IN VEHICLE IN-CABIN: FIELD AND LABORATORY APPROACHES
(Université des Frères Mentouri Constantine, 2016-10-31)Gaseous and particulate pollutants which are emitted from automotive vehicles can infiltrate the surrounding cars exposing drivers and passengers to toxic substances with serious adverse health effects. Since the ... -
ALIGNEMENT DES BANDES D’ENERGIES D’UNE STRUCTURE DETECTRICE INFRAROUGE A DOUBLE INTERFACE GaAlAsSb (P/N) / InAsSb (n)
(Université des Frères Mentouri Constantine, 2013-12-16)Certaines applications telles que l’imagerie thermique, le control de qualité dans les procédés industriels, la surveillance et la vision nocturne nécessitent des caméras équipées de composants détecteurs, opérant dans ... -
AMELIORATION DE L’EFFICACITE DES EMETTEURS DE CHALEUR DANS LES LOCAUX D’HABITATION, NOUVELLE CONCEPTION ECONOMIQUE DU SYSTEME DE VENTILATION DU RADIATEUR A TUBES AVEC UN ECOULEMENT CROISE
(Université des Frères Mentouri Constantine, 2016-10-31)Dans ce présent travail une étude a été effectuée, pour améliorer l’efficacité des émetteurs de chaleur (radiateurs) lors du renouvellement d’air des locaux d’habitation. Un nouveau système économique du système de ventilation ...
