Liste des publications
Enhancement of photoelectrochemical and optical characteristics using a TiO2 nanoparticles interlayer in MEH-PPV heterojunction devices
In this work, MEH-PPV+TiO 2 composite material was prepared by incorporation of titanium oxide nonoparticles (TiO 2) into poly[2-methoxy-5-(2′-ethylhexyloxy)-p-phenylenevinylene] (MEH-PPV) polymer matrix and deposited by spin coating on glass and indium thin oxide (ITO)... Voir les détails
Mots clés : Hybrid composite materials, MEH-PPV, morphology, photocurrent
Effect of the austenite hot deformation on the transformation microstructural mechanics parameters of a microalloyed steel
This study was established to optimize the heat treatments - mechanical and improve the mechanical properties of microalloyed steel with Nb-Ti-V for the production of hot rolled strip. A database of the main parameters of deformation of this steel was developed by dilatometer-plastometer... Voir les détails
Mots clés : Microalloyed steel, Austenite, hot deformation, mechanical properties, structure
Impact of the inhomogeneous structure of the active layer on the transfer characteristic of polysilicon TFT's
Recently polycrystalline silicon (pc-Si) thin film transistors (TFT's) have emerged as the devices of choice for many applications. The TFT's made of a thin un-doped polycrystalline silicon film deposited on a glass substrate by the Low Pressure Chemical Vapor Deposition technique LPCVD have limits... Voir les détails
Mots clés : Transistor TFT, 2D simulation, heterogeneous structure, Grain Size, transfer characteristic
Segmentation of welding defects using level set methods
Non-destructive testing (NDT) is a technique used in science and industry to evaluate the properties of a material without causing damage. In this paper we propose a method for segmenting radiographic images of welding in order to extract the welding defects which may occur during the... Voir les détails
Mots clés : image segmentation, Level set, weld defects, Radiographic image
Uniaxial Anisotropic Substrate Effects on the Resonance of an Equitriangular Microstrip Patch Antenna
Using a new combined approach, the effect of the uniaxial anisotropic dielectrics on the resonant frequency and radiation field of an equi-triangular patch antenna is presented in this paper. The problem is analysed in the spectral domain using the moment method and an electric field integral... Voir les détails
Mots clés : Uniaxial anisotropic dielectric, moment method, spectral domain
In vitro microemboli classification using neural network models and RF signals
Emboli classification is of high clinical importance for selecting appropriate treatment for patients. Several ultrasonic (US) methods using Doppler processing have been used for emboli detection and classification as solid or gaseous matter. We suggest in this experimental study exploiting the... Voir les détails
Mots clés : Microemboli, Gaseous embolus, Solid embolus, RF signals, Neural Network
VIBRATION MONITORING FOR FAULT DIAGNOSIS IN ROTATING MACHINERY USING WAVELET TRANSFORM
Vibration analysis is essential in improving condition monitoring and fault diagnostics of rotating machinery. Many signal analysis methods are able to extract useful information from vibration data. Currently, the most of these methods use spectral analysis based on Fourier Transform (FT)... Voir les détails
Mots clés : Vibration analysis, Fault Diagnosis, Rotating machinery, Spectral analysis, Wavelet transform
Potentials of Inx Ga1-x N photovoltaic tandems
During the past few years a great variety of multi-junction solar cells has been developed with the aim of a further increase in efficiency beyond the limits of single junction devices. In this work, the solar power conversion efficiency of InxGa1-xN based tandem solar cells was investigated. With this... Voir les détails
Mots clés : Tandem, InGaN, Spectral response, I-V characteristics
Effect of the heat treatment on the microstructural evolution of the Nickel based superlloy
The effect of heat treatment on the microstructure of cobalt-rich nickel based superalloy was studied applying scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The aim of the present work was to investigate the formation and evolution of different phases... Voir les détails
Mots clés : superalloy; heat treatment;, SEM and TEM; γ' particles; carbides .
Monotoring of air quality in an iron foundry(Case of NOx, SO2 , benzene and dust)
The requirements as regards ecology are imposed more and more by the legislator. The cast iron foundries,using the cupola furnace like means of fusion and several other materials for the clothes industry of the mouldsand the cores, produce a great quantity of noxious gas and dust. These... Voir les détails
Mots clés : cast iron foundry, gaseous polluant, atmosphere, dust, values who.