A new design of the basin-type solar still with the objective of increasing productivity is proposed. The idea is to use a rotating vertical black wick (VRW) in front of the distiller back wall that will act as an additional ...

The solar chimney is a generator of electrical power from solar energy, based on the conversion of the kinetic energy generated by natural convection into mechanical energy. However, the efficiency of this recent technique ...

Recently, considerable work has been done on the Cu2ZnSnS4 (CZTS) quaternary compound semiconductor, due to its simplicity, low cost and above all its flexibility in the combination of several chemical compounds, to make ...

The thesis proceeded in the context of gamma spectrometry analysis; it is divided into two major parts: The first part is devoted to the simulation of the detector used in the experiment to study some parameters, which we ...

This thesis is devoted to the study of non-relativistic quantum systems with explicitly time and position-time dependent coefficients in the framework of the Feynman's path integrals formalism. We have presented a systematic ...

This thesis deals with string theories in modified formulations. First, we study the open bosonic string with a dust field, this model gives the possibility of construction of a non-critical string. In the same context, ...

The objective of this thesis is firstly the study of the controlled growth of ZnO nanostructures by two methods of synthetsis, a chemical method which is the Sol-Gel ZnO-SG method and a physical method which is the ...

Modern cosmology has several unexplained astrophysical observations which are still paradoxical. Among those mysteries, we find discrepancy in cosmological parameters estimations, accelerated expansion of the Universe, ...

The objective of this investigation is to study the influence of TiO2 phases on the structural and dielectric properties of the BaTiO3 ceramics containing different amounts of Fe2O3. The pure BaTiO3 ceramics was prepared ...

The present study deals with würtzite ZnS nanoparticles embedded in zeolite Y, synthesized by - radiolysis. In a first step; zeolite Y (faugazite) is prepared by hydrothermal methode. In second, Zn2+ ions are fixed on the ...