Oujda, Morocco
Oujda, Morocco

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Abderbi J.,Mohammed 1st University | Abderbi J.,Regional Center for the Professions of Education and Training | Khattach D.,Mohammed 1st University | Kenafi J.,Regional Center for the Professions of Education and Training
Journal of Materials and Environmental Science | Year: 2017

The gravity and aeromagnetic data of High Plateaus (Eastern Morocco) have been reinterpreted by means of a multiscale analysis of the geophysical lineaments. These data were acquired as part of a national exporation project of mineral, groundwater, and hydrocarbon resources. The gravity and magnetic data were analyzed using the horizontal gradient coupled to the upward continuation and Euler deconvolution techniques to image the subsurface structures. These analyses show that the area is characterized by a prevalence of NE-SW lineaments. It includes possible old inherited tectonic structural features which may provide important controls on later basin architecture and evolution as well. Depth analysis indicates that the surface faults may extend to 5km depth. A new sketch map of structural elements was compiled from the aeromagnetic and gravity data interpretation over the High Plateaus area. It includes possible faults, folds and an inferred lithological boundary. This map constitutes a useful document for rationalizing the future research exploration in the area.

Zgou H.,University Ibn Zohr | Boussaidi S.,University Ibn Zohr | Eddiouane A.,University Ibn Zohr | Chaib H.,University Ibn Zohr | And 4 more authors.
Materials Today: Proceedings | Year: 2016

We use the density functional theory (B3LYP/6-31G(d)) to determine structural parameters band gap, absorption and photovoltaic properties of several conjugated organic materials. The chemical structure of these molecules contains fluorene, thiophene and phenylene rings, together with different unities (e.g. Ethylenedioxythiophene EDOT). The theoretical calculations were performed by using Gaussian 09 program supported by GaussView 5.0.8 Interface. The results reveal that the geometrical parameters (dihedral angles, bond lengths) of all molecules possess nearly planar conformations. Moreover, the optoelectronic properties (HOMO, LUMO, Egap...) were determined from the fully optimized structures by using B3LYP/6-31G(d) level. The absorption data (λmax, Etr, OS) of these systems were obtained by TD-B3LYP/6-31G(d) method. The studied molecules Mol-i (with i = 1-6) have low band-gaps with appropriate energy levels of HOMO and LUMO which are desired in photovoltaic applications, especially the Molecules with acceptor unities in their chain. We conclude that these materials are good candidates for bulk heterojunctions used in organic solar cells. © 2016 Elsevier Ltd.

PubMed | University Putra Malaysia, University Mohammed Premier, Lublin University of Life Sciences, University of Sadat City and Mohammed 1st University
Type: Review | Journal: Tumour biology : the journal of the International Society for Oncodevelopmental Biology and Medicine | Year: 2016

The process of angiogenesis is quite well-known nowadays. Some medicines and extracts affecting this process are already used routinely in supporting the conventional treatment of many diseases that are considered angiogenic such as cancer. However, we must be aware that the area of currently used drugs of this type is much narrower than the theoretical possibilities existing in therapeutic angiogenesis. Plant substances are a large and diverse group of compounds that are found naturally in fruits, vegetables, spices, and medicinal plants. They also have different anticancer properties. The aim of this literature review article is to present the current state of knowledge concerning the molecular targets of tumor angiogenesis and the active substances (polyphenols, alkaloids, phytohormones, carbohydrates, and terpenes) derived from natural sources, whose activity against cancer angiogenesis has been confirmed.

Alsharahi G.,Abdelmalek Essaadi University | Driouach A.,Abdelmalek Essaadi University | Faize A.,Mohammed 1st University
International Journal of Microwave and Optical Technology | Year: 2015

Abstract--The geological radar or GPR (Ground Penetrating Radar) is an electromagnetic system used in non-destructive investigations of subsoil. It is based on the emission by an antenna coupled to the ground, of short electromagnetic pulses of harmonic waves sweeping a certain frequency band. In this work, the simulation of radar signals GPR by using Reflexw software was considered. This program is based on the numerical method known as finite difference in time domain (FDTD). The simulations that have been performed included the following items: an iron bar, a plastic tube and a plastic water bottle. All have been buried in stratified soil. The obtained results have shown that the diffracted electromagnetic waves are very sensitive to variations in the dielectric permittivity and electrical conductivity. © 2015 IAMOT.

Alsharahi G.,Abdelmalek Essaadi University | Mostapha A.M.M.,Abdelmalek Essaadi University | Faize A.,Mohammed 1st University | Driouach A.,Abdelmalek Essaadi University
Journal of Electromagnetic Engineering and Science | Year: 2016

The problem of resolution in antenna ground-penetrating radar (GPR) is very important for the investigation and detection of buried targets. We should solve this problem with software or a numeric method. The purposes of this paper are the modelling and simulation resolution of antenna radar GPR using three antennas, arrays (as in the software REFLEXW), the antenna dipole (as in GprMax2D), and a bow-tie antenna (as in the experimental results). The numeric code has been developed for study resolution antennas by scattered electric fields in mode B-scan. Three frequency antennas (500, 800, and 1,000 MHz) have been used in this work. The simulation results were compared with experimental results obtained by Rial and colleagues under the same conditions. © The Korean Institute of Electromagnetic Engineering and Science.

Alsharahi G.,Abdelmalek Essaadi University | Faize A.,Mohammed 1st University | Mint Mohamed Mostapha A.,Abdelmalek Essaadi University | Driouach A.,Abdelmalek Essaadi University
International Journal on Communications Antenna and Propagation | Year: 2016

The aims of this paper are the study of response signals of the Ground Penetrating Radar (GPR) and the development of one numerical code in order to improve the efficiency of the simulation and to compare the obtained results by different softwares (GprMax2D/3D and Reflexw). The first software is free while the other is not and it is expensive. The work presented here examines objects buried in homogenous and inhomogeneous dielectrics mediums using 400 MHz and 800 MHz antennas, in order to study the influence the mediums on the detected signals. © 2016 Praise Worthy Prize S.r.l. - All rights reserved.

Alsharahi G.,Abdelmalek Essaadi University | Driouach A.,Abdelmalek Essaadi University | Faize A.,Mohammed 1st University
Journal of Theoretical and Applied Information Technology | Year: 2015

The Finite-Difference Time Domain (FDTD) method has become a standard simulation technique in computational electromagnetics. It has been extended and improved for accurately treating almost any kind of problem involving complex materials with arbitrary geometry and it continues to be an active field of research. The method has become so powerful that it is used as the computational core of not only many inhouse tools but also commercial packages used to design electromagnetic systems (Reflexw, CST, EMPIRE, XFDTD, etc). Computational tools, such as FDTD, have become power-ful tools for GPR user, since the time-domain nature of FDTD-based programs enables the visualization of the causal evolution of complex electromagnetic phenomena such as the propagation of electromagnetic pulses in GPR scenarios that involve layered media, dispersive media, objects of arbitrary shape, etc. In the following paper several scenarios found during the GPR survey are simulated using FDTD and the results are commented on. © 2005 - 2015 JATIT & LLS. All rights reserved.

Alsharahi G.,Abdelmalek Essaadi University | Driouach A.,Abdelmalek Essaadi University | Faize A.,Mohammed 1st University
Proceedings of the International Conference on Microelectronics, ICM | Year: 2016

This paper is devoted to study the propagation of electromagnetic waves of ground radar (GPR) in geological environments (heterogeneous). GPR is a method based on the analyze of spread the diffraction and reflection electromagnetic waves in high frequency (0.1 MHz to 2.6 GHz). A number of models have been designed to simulate the varieties of geological conditions. FDTD one of these models, which based on the scientific computing software called Reflexw simulation code. During the signal radar spread from the geological environment. We note that the signal decreases due to the absorption phenomenon and reflection. Our results show that the effective permittivities have a great impact on the wave behavior in different geological environments. © 2015 IEEE.

El Farissi I.,Mohammed 1st University | Azizi M.,Mohammed 1st University | Moussaoui M.,Mohammed 1st University
Proceedings of 2012 International Conference on Multimedia Computing and Systems, ICMCS 2012 | Year: 2012

The classification of the smartcard attacks is part of learning process used for understanding the different ways of breaking the system security. In fact, these classification methods can be applied for improving the system security, especially the smartcard one. In the paper, we study one of the smart classification methods, able to learn from data patterns and classify the attacks intelligently in order to respond as an appropriate case previously identified. According to this methodology, we develop first a neural network via the simulator JavaNNS, then we create a training database which contains attacks and class's models that the network must learn and then it must be able to classify other models contained in the test database and finally install the network generated in a javacard in order to get a smart one. © 2012 IEEE.

Ouali H.A.L.,Mohammed 1st University | Merrouni A.A.,Mohammed 1st University | Moussaoui M.A.,Mohammed 1st University | Mezrhab A.,Mohammed 1st University
Proceedings of 2015 International Conference on Electrical and Information Technologies, ICEIT 2015 | Year: 2015

This paper presents the simulation results of a 50 MWe solar thermal tower plant under the climate of Oujda, a city located at North-east of Morocco. For this purpose, one year of meteorological data with one minute step has been collected via a high precision meteorological station installed at the University of Oujda. Afterward, a meteo-file of one hour step has been created and injected to Greenius simulation software, in order to calculate the annual yield electricity production of a 50 MWe solar tower with an open air volumetric receiver and one tank storage system. For an annual direct normal irradiation (DNI) of 1989.9 kWh/m2, the tower produces a thermal energy of 387 768 MWhth and an annual electricity of 144 909 MWhel. The mean efficiency of the tower system under the climate of Oujda is of 13.6%, which can be considered as high and cost effective. © 2015 IEEE.

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