Now showing items 1-20 of 472

    • 0PTIMISATION DU TAUX DE CICATRISATION EN LINGOTIÈRE AU COURS DE LA COULÉE CONTINUE D’ACIER 

      BOUREBIA, MOUNIRA; LAOUAR, L; CHAOUR, M (Université des Frères Mentouri Constantine, 2013-12-16)
      During the continuous casting of steel, the solidification phase in the ingot mold is very important, and it is governed by three main factors that are thermal transfer, ingot mold oscillation and lubrication. So the ...
    • 2D-Numerical Analysis of IDS-VGS Characteristic In pc-Si TFT's: Investigation of Inhomogeneous Structure 

      Tayoub, Hadjira; Bensmain, Asmaa; Zebentout, Baya; Benamara, Zineb (Université des Frères Mentouri Constantine, 2013-02-17)
      Transistors made of thin layers (Thin Film Transistor: TFT) are used primarily for the realization of active matrix flat panel displays liquid crystal. They constitute the basic element of a specific part of electronic ...
    • 3D NUMERICAL STUDY OF FLOW IN A SOLAR CHIMNEY POWER PLANT SYSTEM 

      TAYEBI, T; DJEZZAR, M (Université des Frères Mentouri Constantine, 2013-12-16)
      Heat transfer process and fluid flow in a Solar Chimney Power Plant System used for natural ventilation are investigated numerically. Using the Spanish prototype plant as simulation object. Choosing calculative model and ...
    • A COMPARATIVE STUDY OF Al-5%Co-2%Ti AND Al-30%Co-2%Ti ALLOY SYSTEMS 

      SASSANE, N; DEBILI, M.Y; BOUKHRIS, N.E (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 

      MOSTEFAOUI, M; MAZARI, H; MANSOURI, S; BENAMARA, Z; KHELIFI, R; BENSEDDIK, N; AMEUR, K; BENYAHYA, N; BLUET, J.M; CHIKHAOUI, W (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 

      Keddar, Mohamed; Della Krachai, Mohamed; Midoun, Abdelhamid (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 NON COMMUTATIVE APPROACH TO COSMIC STRINGS 

      MENACER, L; AISSAOUI, H (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 

      CHEKIROU, W; BOUKHEIT, N; KARAALI, A (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 SPUTTERED ZnO THIN FILMS AS A TCO 

      SEBAA, N; BENHALILIBA, M; TOMBAK, A; OCAK, Y. S (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 

      ZIANE, M. I; BENNACER, H; LABDELLI, B; BENSAAD, Z (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 

      Soltani, F; Baaziz, H; Charifi, Z (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 

      LIDJICI, H; DNIDNI, Y; LAGOUN, B (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 

      BRAHIMI, S; BOUZAR, H (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 

      ABDI, N; BENSALEM, R (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 

      KHADRAOUI, A; BENTAYEB, F. Z (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 ...
    • ALIGNEMENT DES BANDES D’ENERGIES D’UNE STRUCTURE DETECTRICE INFRAROUGE A DOUBLE INTERFACE GaAlAsSb (P/N) / InAsSb (n) 

      AOUAD, I; MEHARRAR, F.Z; AIT-KACI, H (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 ...
    • An experimental study of mints solar drying systems 

      Metidji, N; Badaoui, W; Sellami, R; Djebli, A (Université des Frères Mentouri Constantine, 2013-02-17)
      Many research studies have been performed on forced convection (active) solar dryers for fruit, vegetables and plants. A short survey of these showed that applying the forced convection solar dryer not only significantly ...
    • ANALYSE ET OPTIMISATION D'UN ISOLATEUR COPLANAIRE EN UTILISANT UNE COUCHE MINCE DE FERRITE 

      BOUDJERDA, M; MERZOUKI, A; ZERGOUG, M (Université des Frères Mentouri Constantine, 2013-12-16)
      L’objectif de ce travail est l’analyse et l’optimisation d’un isolateur coplanaire en bande X pour l’utilisation en équipements de contrôle non destructif et dans le domaine de télécommunications. Cet isolateur est ...
    • ANALYSIS AND COMPARAISON OF SOLAR ASSITED HEAT PUMP SYSTEMS FOR HEATING 

      Boulkamh, M; Gomri, R (Université des Frères Mentouri Constantine, 2013-02-17)
      Heating systems and solar-heat pump are innovative technologies to support the production of ecological heat. They are becoming more important due to the acceleration of climate change and the rising cost of fossil ...
    • ANALYTICAL TREATMENT OF THE ASYMMETRIC SPINLESS SALPETER COULOMB PROBLEM 

      CHARGUI, Y; TRABELSI, A (Université des Frères Mentouri Constantine, 2013-12-16)
      An analytical treatment of the two-body asymmetric spinless Salpeter equation with a Coulomb interaction is presented. The exact bound-state energy equation associated to the s-waves is obtained