Publications (362)
ARTICLE
Nonlinear optical properties of natural laccaic acid dye studied using Z-scan technique
S. Zongo, K. Sanusi, J. Britton, P. Mthunzi, T. Nyokong, M. Maaza, B. Sahraoui
We have investigated the nonlinear optical properties, including the optical limiting behaviour for five different concentrations of laccaic acid dye in solution and a thin film obtained through doping in poly (methyl methacrylate) (PMMA) polymer. The experiments were performed by using single beam Z-scan technique at 532 nm with 10 ns, 10 Hz(...)
Mots clés non renseignés
ARTICLE
On the capacitance of crystalline silicon solar cells in steady state
FABE IDRISSA, BARRO MOUSTAPHA SANE , BERNARD ZOUMA
In this work, an analytical approach is presented for modeling the capacitance of crystalline silicon solar cells. Based on a one-dimensional modeling of the cell, the excess minority carrier density, the photovoltage, and the capacitance are calculated. The motivation of this work are two-fold: to show base doping density and illumination eff(...)
Mots clés non renseignés
ARTICLE
Linear and nonlinear optical absorption characterization of natural laccaic acid dye
S. Zongo, S. M. Dhlamini, A. P. Kerasidou, P. Beukes, B. Sahraoui, M. Maaza,
We report on the optical performances of laccaic acid dye in solution at different concentrations and dye–poly(methyl methacrylate) composite thin films. The linear spectral characteristics including optical constants, i.e. refractive index (n) and extinction coefficient (k), were carried out in a comprehensive way through absorbance, fluoresc(...)
Mots clés non renseignés
ARTICLE
Influence of chemical potential on water transport in a hygroscopic soil
Samuel Ouoba, Fabien Cherblanc, Jean-Claude Bénet, Jean Koulidiati
Concerning the description of mass transport in a porous media, particularly in soil, the question is to know what are the main mechanisms to consider during transport phenomena for a best description of these transports. The answer to this question requires good understanding on thermodynamic law to include in the transport process for a good(...)
Chemical Potential, Transport, Hygroscopic Soil
ARTICLE
Caractérisation mécanique et thermophysique des blocs de terre comprimée stabilisée au papier (cellulose) et/ou au ciment.
Emmanuel Ouedraogo , Ousmane Coulibaly , Abdoulaye Ouedraogo, Adamah Messan
Cet article présente une étude expérimentale portant sur la caractérisation de matériaux locaux utilisés dans la construction des bâtiments. Ces matériaux sont des blocs de terre compressée et stabilisée au ciment et/ou au papier. Ces matériaux composites utilisés pour l'enveloppe du bâtiment ont une grande stabilité à l’eau. Les mesures des(...)
Blocs de terre comprimée Papier (cellulose) Propriétés mécaniques Propriétés thermophysiques
ARTICLE
Kinematics and mass modelling of M33: Hα observations
Zacharie Sie Kam, Claude Carignan, Laurent Chemin, Philippe Amram, Benoit Epinat
As part of a long-term project to revisit the kinematics and dynamics of the large disc galaxies of the Local Group, we present the first deep, wide-field (∼42 arcmin × 56 arcmin) 3D-spectroscopic survey of the ionized gas disc of Messier 33. Fabry–Perot interferometry has been used to map its Hα distribution and kinematics at unprecedented an(...)
techniques: interferometric, ISM: bubbles, H II regions, galaxies: individual: M33, galaxies: ISM, galaxies: kinematics and dynamics
ARTICLE
Theoretical Investigation of Base doping and illumination level effects on a bifacial silicon solar cell.
10.9734/BJAST/2015/1562810.9734/BJAST/2015/15628
In this paper, we are investigating theoretically the behavior of a bifacial silicon solar cell in steady state with different illumination conditions. The bifaciality coefficient and the conversion efficiencyare calculated for various rear side illumination conditions (traduced here by the illumination le(...)
Mots clés non renseignés
ARTICLE
Fabrication of Amorphous Silver Nanowires by Helium Ion Beam Irradiation
Shehla, Ali A., Zongo S., Javed I, Ishaq A., Khizar H., Naseem S., Maaza M.
Amorphous silver nanowires (a-Ag NWs) are fabricated from crystalline Ag NWs by using 5 MeV helium (He+) ion beam irradiation. At low dose (5×1015 ion/cm2), few defects are created in Ag NWs. As dose increases, more damage to the crystalline structure of Ag NWs is observed. Finally at high dose (8×1016 ion/cm2), the face-centered cubic structu(...)
Mots clés non renseignés
ARTICLE
Highlighting of a local non-equilibrium thermodynamics during the transfer of trichlorethylene (TCE) in the superficial layers of arid soils
Samuel Ouoba, Bruno Cousin, David Y. Toguyeni, Salifou K. Ouiminga, Fabien Cherblanc, Jean Koulidiati & Jean-Claude Bénet
In this paper, we analyse and model the mass transfer of trichloroethylene in the surface layer of soil. Our study essentially focuses on arid soils taking into account the phase change liquid–vapour. We have then examined the validity of the assumption of local equilibrium by comparing the values of instantaneous pressure of the trichlo- roet(...)
Transfer, non-equilibrium, trichloroethylene, arid soil
ARTICLE
Spectroscopic study of the system 2Σ→ 2π of OHradical and determination of the rotational temperatures by using a numerical model
Samuel Ouoba, Tizane Daho, Arsène H. Yonli, Jean Koulidiati
We develop in this note a simple and practical method for the determination of the rotational temperatures based on the observation of molecular bands produced by the OH-radical. For this, we make an approach based on the concept of thermodynamic equilibrium and we proceed to a detailed study of OH. We carry out the simulation of this OH-radic(...)
Energy Levels, Spectrum, Rotational Temperature, OH-radical
ARTICLE
INFLUENCE OF ELECTROMAGNETIC WAVES PRODUCED BY AN AMPLITUDE MODULATION RADIO ANTENNA ON THE ELECTRIC POWER DELIVERED BY A SILICON SOLAR CELL
I. ZERBO, M. ZOUNGRANA, A. OUEDRAOGO, B. KORGO, B. ZOUMA AND D. J. BATHIEBO
This article presents a one dimensional modeling of the influence of electromagnetic waves on the electric power
delivered by a silicon solar cell under monochromatic illumination in steady state. The electromagnetic waves are
produced by an amplitude modulation radio antenna of 2MW power of radiation and located at a variable distance of
t(...)
Amplitude modulation, Radio antenna, Electromagnetic waves, Monochromatic illumination, Solar cell
ARTICLE
Determination of processes suitable for cotton stalk carbonization and torrefaction by partial combustion using a metal kiln
Ibrahim G. Harouna, Oumar Sanogo, Tizane Daho, Salifou K. Ouiminga, Abouzeidi Dan-Maza, Bernard Nana, Jean Koulidiati
n this work, the technical feasibility of cotton stalk carbonization and torrefaction was studied. A metallic homemade cylindrical furnace 60 cm in diameter and 90 cm in height was used for the experiments. A partial combustion process was used both for carbonization and torrefaction. Three carbonization methods were defined based on the amoun(...)
cotton stalks, carbonization, torrefaction
ARTICLE
Eco Insulation Materials: Reduction of Cooling Loads of a House Made of Breeze Block or Laterite in a Dry Tropical Climate:
Ousmane Coulibaly and David Yemboini Kader Toguyeni
In this paper, we study the influence of eco materials for roof insulation and fiber-reinforced mortar coatings on cooling loads of a home in dry tropical climate. The walls of the house are made of cinderblock or laterite and the insulating material of a roof panel is made with lime (24%), cement (6%), water (50%) of vegetable fibers hibiscus(...)
Hot-plate approach, laterite, fiber-reinforced mortar, TRNSYS model
ARTICLE
Influence of Ambient Pressure on the Evaporation of Volatile Organic Pollutants (VOP) during Soil Decontamination: Case of the Trichloroethylene (TCE)
Samuel Ouoba, Salifou K. Ouiminga, Justin Zaida, Bruno Cousin, Moussa Sougoti, Jean Koulidiati
This article presents the results on the volatilization of the volatile organic pollutants (VOP) during decontamination process from the soil. The choice of TCE as a volatile organic pollutant is explained by the fact that it is relatively highly soluble in water, compared to other compounds, which excludes any possibility of adsorption of its(...)
Soil, Volatile organic pollutant, Evaporation, Ambient pressure
ARTICLE
Z-scan and optical limiting properties of Hibiscus Sabdariffa dye
Diallo, S. Zongo, P. Mthunzi, S. Rehman, S. Y. Alqaradawi, W. Soboyejo & M. Maaza
The intensity-dependent refractive index n 2 and the nonlinear susceptibility χ (3) of Hibiscus Sabdariffa dye solutions in the nanosecond regime at 532 nm are reported. More presicely, the variation of n 2, β, and real and imaginary parts of χ (3) versus the natural dye extract concentration has been carried out by z-scan and optical limiting(...)
Mots clés non renseignés