Center Regional Des Metiers Of Leducation Et Of La Formation

Oujda, Morocco

Center Regional Des Metiers Of Leducation Et Of La Formation

Oujda, Morocco

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Ahl Laamara R.,Mohammed V University | Ahl Laamara R.,Center Regional Des Metiers Of Leducation Et Of La Formation | Douhou K.,Mohammed V University | Ennadifi S.-E.,Mohammed V University
Astroparticle Physics | Year: 2015

It is shown that heavy sterile neutrinos can be a consequence of a new broken U(1)X symmetry. This sterile symmetry is further speculated to be related to the conservation of the dark number associated with Dark Matter particles, corresponding to a dark neutrino mass mND≥1keV with a high scale ≥∼102GeV dark symmetry U(1)D breaking. © 2014 Elsevier B.V. All rights reserved.


PubMed | Medecin generaliste, Laboratoire dEpidemiologie and Center Regional Des Metiers Of Leducation Et Of La Formation
Type: Journal Article | Journal: Eastern Mediterranean health journal = La revue de sante de la Mediterranee orientale = al-Majallah al-sihhiyah li-sharq al-mutawassit | Year: 2014

A thesis in medicine is a scientific work which allows a medical student to acquire a Doctor of Medicine degree. It is therefore recommended that theses presented by students fulfill essential methodological criteria in order to obtain scientifically credible results and recommendations. The aim of this study was to assess the methodology of thesis presented to the Faculty of Medicine in Fez in 2008. We developed an evaluation table containing questions on the different sections of the IMRAD structure on which these theses were based and we estimated the proportion of theses that conformed to each criterion. There were 160 theses on various specialties presented in 2008. The majority of the theses (79.3%) were case series. Research questions were clearly expressed in 62.0% but the primary objectives were pertinent in only 52.0%. Our study shows that there were important deficiencies in the methodological rigor of the theses and very little representation of the theses in publications.


Ouasri A.,Center Regional Des Metiers Of Leducation Et Of La Formation | Ouasri A.,Université Ibn Tofail | Rhandour A.,Université Ibn Tofail | Saadi M.,Mohammed V University | El Ammari L.,Mohammed V University
Acta Crystallographica Section E: Structure Reports Online | Year: 2013

The title organic-inorganic hybrid compound, {(C7H20N2)[BiCl5]} n , consists of distorted corner-joined [BiCl6] octahedra forming zigzag polymeric anionic chains parallel to [001], separated by columns of heptylenediammonium cations. The asymmetric unit contains two crystallographically independent bismuth metal atoms, one of which lies on an inversion centre and the other on a twofold axis. In the crystal, the polymeric chains and cations are linked by N - H⋯Cl hydrogen bonds, forming undulating layers parallel to (110).


We used an exact analytical approach to investigate the propagation of the electromagnetic wave through a photonic band gaps material with sinusoidal periodicity of a dielectric permittivity. Mathieu's functions are used to obtain the solution of Maxwell equations in the structure for the nonzero angle of incidence wave. The analytical expression of the transmittance and the distribution of the electric field inside the structure are given. © 2015 Elsevier GmbH.


Ouasri A.,Center Regional Des Metiers Of Leducation Et Of La Formation
Chemistry | Year: 2016

This article aims to study the difficulties of the Moroccan high school pupils in teaching of the acid-base topic. Based on others similar context, particularly the Tunisian one, we have firstly carried out a classification of the knowledge objects relating to acid-base titrations in the empirical register and in the register of models. The analysis of the written productions of the pupils in situation of solving problem showed that the Moroccan pupils in classes of second Baccalaureate encountered difficulties to appropriate the knowledge objects relating to weak acide-strong base titrations and to adapt these knowledge as well as with the empirical register and with the register of models.


Terhzaz J.,Center Regional Des Metiers Of Leducation Et Of La Formation | Terhzaz J.,Mohammed V University | Elmajid H.,Mohammed V University | Ammor H.,Mohammed V University
MATEC Web of Conferences | Year: 2014

This W presents a new technique of Dielectric Characterization of composites building materials. This technique is based on the modeling of an open coaxial cell with a mathematical formulation that links the admittances of the filled and empty cell to the complex permittivity ε* of materials characterization. We applied this technique to the dielectric characterization of some building materials powder in the frequency band (100MHz-4GHz). We also characterize some composite materials (sand- brick, cement- sand, and cement-brick) depending on the volume fraction for Mobile Phone Frequencies. We made a comparison with the laws of mixtures to identify the most appropriate law to render the dielectric behavior of these materials. © Owned by the authors, published by EDP Sciences, 2014.


Ouasri A.,Center Regional Des Metiers Of Leducation Et Of La Formation | Ouasri A.,Université Ibn Tofail | Rhandour A.,Université Ibn Tofail | Saadi M.,Mohammed V University | El Ammari L.,Mohammed V University
Acta Crystallographica Section E: Structure Reports Online | Year: 2014

The asymmetric unit of the title organic-inorganic molecular salt, C6H18N2 2+·SiF6 2-, consists of one anion and one cation together with half of each of two cations and two anions located on inversion centres. The SiF6 2- octahedral anions are arranged to form sheets parallel to (011), which are linked into a three-dimensional network by the organic cations through N-H.F hydrogen bonds.


Ouasri A.,Université Ibn Tofail | Ouasri A.,Center Regional Des Metiers Of Leducation Et Of La Formation | Jeghnou H.,Université Ibn Tofail | Rhandour A.,Université Ibn Tofail | Roussel P.,CNRS Laboratory of Catalysis and Solid State Chemistry
Journal of Solid State Chemistry | Year: 2013

The crystal structure of [NH3(CH2)6NH 3]BiCl5 was determined at: 223 K [P212 121 (Z=4), a=7.788(1), b=13.886(2), c=13.972(2) Å], 308 K [P21/n (Z=8), a=19.972(3), b=7.772(2), c=20.166(3) Å, β=92.32(1)°] and 378 K [Pnma (Z=4), a=13911(2), b=7.834(7), c=14.457(2) Å]. It was consisted of isolated (BiCl52-) n anionic chains composed by distorted octahedra BiCl 63- sharing two corners and +NH 3(CH2)6NH3+ cations placed in the free cavities between anionic chains. In the β phase, there are two crystallographically inequivalent cations and two one-dimensional anionic chains (BiCl52-)n in which BiCl 63- octahedra was doubly tilted and simply tilted. Two structural phase transitions at low and high temperatures α (P2 12121, 223 K)↔β (P21/n, 308 K)↔γ (Pnma, 373 K) are observed and discussed. It was crystallographically showed that both anionic and cationic entities contribute to phase transitions mechanisms. The BiCl63- octahedra were found to posses significant distortions on decreasing temperature and became more distorted in α (223 K) phase. It is argued that these deformations are caused by weak to moderate NH···Cl hydrogen bonding. © 2013 Elsevier Inc.


Chabli A.,Center Regional Des Metiers Of Leducation Et Of La Formation | Chalouan A.,Mohammed V University | Akil M.,Mohammed V University | Galindo-Zaldivar J.,Instituto Andaluz Of Ciencias Of La Tierra | And 7 more authors.
Journal of Geodynamics | Year: 2014

The Atlantic Moroccan Meseta margin is affected by far field recent tectonic stresses. The basement belongs to the variscan orogen and was deformed by hercynian folding and metamorphism followed by a post-Permian erosional stage, producing the flat paleorelief of the region. Tabular Mesozoic and Mio-Plio-Quaternary deposits locally cover the Meseta, which has undergone recent uplift, while north of Rabat the subsidence continues in the Gharb basin, constituting the foreland basin of the Rif Cordillera. The Plio-Quaternary sedimentary cover of the Moroccan Meseta, mainly formed by aeolian and marine terraces deposits, is affected by brittle deformations (joints and small-scale faults) that evidence that this region - considered up to date as stable - is affected by the far field stresses. Striated faults are recognized in the oldest Plio-Quaternary deposits and show strike-slip and normal kinematics, while joints affect up to the most recent sediments. Paleostress may be sorted into extensional, only affecting Rabat sector, and three main compressive groups deforming whole the region: (1) ENE-WSW to ESE-WNW compression; (2) NNW-SSE to NE-SW compression and (3) NNE-SSW compression. These stresses can be attributed mainly to the NW-SE oriented Eurasian-African plate convergence in the western Mediterranean and the escape toward the SW of the Rif Cordillera. Local paleostress deviations may be related to basement fault reactivation. These new results reveal the tectonic instability during Plio-Quaternary of the Moroccan Meseta margin in contrast to the standard passive margins, generally considered stable. © 2014 Elsevier Ltd.


El Moussaouy A.,University Mohammed Premier | El Moussaouy A.,Center Regional Des Metiers Of Leducation Et Of La Formation | Ouchani N.,Center Regional Des Metiers Of Leducation Et Of La Formation
Physica B: Condensed Matter | Year: 2014

We studied theoretically the effects of hydrostatic pressure and temperature on the binding energy of shallow hydrogenic impurity in a cylindrical quantum dot (QD) using a variational approach within the effective mass approximation. The hydrostatic stress was applied along the QD growth axis. The interactions between the charge carriers and confined longitudinal optical (LO) phonon modes are taken into account. The numerical computation for GaAs/Ga1-x AlxAs QD has shown that the binding energy with and without the polaronic correction depends on the location of the impurity and the pressure effect and it is more pronounced for impurities in the QD center. Both the binding energy and the polaronic contribution increase linearly with increasing stress. For each pressure value, these energies are also found to decrease as the temperature increases. The results obtained show that in experimental studies of optical and electronic properties of QDs, the effects of pressure, temperature and polaronic correction on donor impurity binding energy should be taken into consideration. © 2013 Elsevier B.V.

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