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Journal of Physics

ISSN 2165 - 5286 (Print)

ISSN 2165 - 5294 (Online)

Website: http://www.researchpub.org/journal/jp/jp.html

Volume 02, Number 02  (December 2013)
2-D Problem of Generalized Magneto-Thermoelastic Diffusion with Temperature-Dependent Elastic Moduli
Author(s)Mohamed I. A.Othman and Yassmin D. Elmaklizi
Abstract

The present investigation is concerned with the effect of magnetic field on the generalized thermoelastic diffusion with temperature-dependent elastic meduli. The modulus of elasticity is taken as a linear function of reference temperature. The present model is describing the generalization Lord-Shulman theory. The expressions for the temperature, displacement components, the thermal stress distributions and the concentration of diffusion are obtained by using the normal mode method. Numerical results are obtained and illustrated graphically for the problem considered.

Quantum Dynamics Model as an Approach to Study Atomic and Molecular Structures
Author(s)Shaker El-shater, Ramadan Saleh Tantawi, A. Abdel-hafiez and Ihab Abdel-latif
Abstract

This work is very necessary to find field of applications for our theories concerning the quantum dynamics applying for atomic and molecular structure. On the resent years, study of atoms and molecules and its structures gets an extremely attentions of tasks of many researchers institute, specially, the photodissociation processes, which needs a variety of computational chemistry, in the two areas, molecular mechanics and electronic structure theory. Also, we need a different computer programs to calculate the total energy absorption cross-section for the photodissociation processes of a molecules, using quantum dynamical methods, which will be one of my main tasks on this research review article. There are two major classes of electronic structure methods: Semi-empirical methods and ab initio methods. The two classes are of interest for both theoreticians and experimentalists.

The Influence of Gravitational Field and Rotation on Thermoelastic Solid with Voids under Green-Naghdi Theory
Author(s)Mohamed I. A. Othman, Magda E. M. Zidan and Mohamed I. M. Hilal
Abstract

The aim of the present study is concerned with the rotation of thermoelastic material with voids under the effect of gravity. The entire porous medium is rotating with a uniform angular velocity. The problem is studied in the context of Green-Naghdi (G-N) theory of types II and III with the effect of rotation, gravity and voids. The methodology applied here is the use of the normal mode analysis to solve the thermal shock problem to obtain the exact expressions for the displacement components, stresses, temperature distribution, and change in volume fraction field have been depicted graphically by comparison between two types of (G-N) theory [of types II and III] in the presence and the absence of rotation and gravity influence for thermoelastic material in presence of voids.