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Search Results: 1 - 5 of 5 matches for " Ouloum Aoudé "
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Fabrication, Characterization and Optical Properties of CuIn3Se5 Bulk Compounds  [PDF]
Dayane Habib, Ouloum Aoudé, Slyman Karishy, Georges El Haj Moussa
World Journal of Condensed Matter Physics (WJCMP) , 2015, DOI: 10.4236/wjcmp.2015.53021
Abstract: The present work prepared the CuIn3Se5 ingots by using a horizontal Bridgman method and investigated the Energy Dispersive Spectrometry (EDS) and X-Ray Diffraction (XRD) to calculate the compositions of the ingots. Photoluminescence was used to check their optical properties. It was found that CuIn3Se5 had either a Stanite structure, an Ordered Defect Chalcopyrite (ODC) structure, or an Ordered Vacancy Chalcopyrite (OVC) structure. The gap energy obtained by Photoluminescence (PL) for the different samples is 1.23 eV. Studying the variation of the gap as a function of the temperature shows that the transition is a D-A type.
Two simple systems with cold atoms: quantum chaos tests and nonequilibrium dynamics
Cavan Stone,Yassine Ait El Aoud,Vladimir A Yurovsky,Maxim Olshanii
Physics , 2010, DOI: 10.1088/1367-2630/12/5/055022
Abstract: This article is an attempt to provide a link between the quantum nonequilibrium dynamics of cold gases and fifty years of progress in the lowdimensional quantum chaos. We identify two atomic systems lying on the interface: two interacting atoms in a harmonic multimode waveguide and an interacting two-component Bose-Bose mixture in a double-well potential. In particular, we study the level spacing distribution, the wavefunction statistics, the eigenstate thermalization, and the ability to thermalize in a relaxation process as such.
Performance analysis of the optimal strategy under partial information
Ahmed Bel Hadj Ayed,Grégoire Loeper,Sofiene El Aoud,Frédéric Abergel
Quantitative Finance , 2015,
Abstract: The question addressed in this paper is the performance of the optimal strategy, and the impact of partial information. The setting we consider is that of a stochastic asset price model where the trend follows an unobservable Ornstein-Uhlenbeck process. We focus on the optimal strategy with a logarithmic utility function under full or partial information. For both cases, we provide the asymptotic expectation and variance of the logarithmic return as functions of the signal-to-noise ratio and of the trend mean reversion speed. Finally, we compare the asymptotic Sharpe ratios of these strategies in order to quantify the loss of performance due to partial information.
Comparative proteomic analysis of Lactobacillus plantarum for the identification of key proteins in bile tolerance
Erwann Hamon, Peter Horvatovich, Esther Izquierdo, Fran?oise Bringel, Eric Marchioni, Dalal Aoudé-Werner, Sa?d Ennahar
BMC Microbiology , 2011, DOI: 10.1186/1471-2180-11-63
Abstract: Bile tolerance properties of nine L. plantarum strains were studied in vitro. Three of them presenting different bile tolerance levels were selected for comparative proteomic analysis: L. plantarum 299 V (resistant), L. plantarum LC 804 (intermediate) and L. plantarum LC 56 (sensitive). Qualitative and quantitative differences in proteomes were analyzed using two-dimensional electrophoresis (2-DE), tryptic digestion, liquid chromatography-mass spectrometry analysis and database search for protein identification. Among the proteins correlated with differences in the 2-DE patterns of the bacterial strains, 15 have previously been reported to be involved in bile tolerance processes. The effect of a bile exposure on these patterns was investigated, which led to the identification of six proteins that may be key in the bile salt response and adaptation in L. plantarum: two glutathione reductases involved in protection against oxidative injury caused by bile salts, a cyclopropane-fatty-acyl-phospholipid synthase implicated in maintenance of cell envelope integrity, a bile salt hydrolase, an ABC transporter and a F0F1-ATP synthase which participate in the active removal of bile-related stress factors.These results showed that comparative proteomic analysis can help understand the differential bacterial properties of lactobacilli. In the field of probiotic studies, characteristic proteomic profiles can be identified for individual properties that may serve as bacterial biomarkers for the preliminary selection of strains with the best probiotic potential.Research efforts are currently underway in order to better understand the host-microbe interactions that occur in the human gastrointestinal (GI) tract [1,2]. Evidence suggests that the upset of the GI microflora balance underlies many diseases and that therapies often start with the restoration of a healthy balance [3]. In this respect, probiotics (i.e. "live organisms that, when administered in adequate amounts, confer a h
La déhiscence du canal semi circulaire supérieur
S Kharrat, I Dridi, R Boulakbech, C El Aoud, S Tababi, R Zainine, N Beltaief, E Menif, S Sahtout, G Besbes
Journal Tunisien d'ORL et de Chirurgie Cervico-Faciale , 2010,
Abstract: Introduction : Superior semicircular canal dehiscence is a rare entity witch is recently described. The common symptom is pressure-induced vertigo. Patients and methods: we report 2 cases of superior semicircular canal dehiscence identified by computed tomography (CT) of the petrous bone in patients with mixed hearing loss and a normal tympanic membrane. Results: Superior semicircular canal dehiscence was bilateral in 1 patient. Mixed hearing loss with a normal tympanic membrane without vertigo was the presenting manifestation in all cases. Ultrahigh-resolution CT of the petrous bones with coronal and sagittal sections provided the diagnosis of superior semicircular canal dehiscence. Conclusion: Mixed hearing loss with a normal tympanic membrane should suggest superior semi circular canal dehiscence. Coronal and sagittal CT sections less than 1 mm in thickness establish the diagnosis.
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