Aims: For modeling of large polyatomic systems one may use the variation principle for energy density functional. The key point to make this is to find the functional of kinetic energy in the orbital-free approach. Study Design: We describe a way to find functionals of kinetic en...
Open access
Research Article10.9734/PSIJ/2014/10415
The purpose of this study is to appreciate the estimation of TIEGCM (Thermosphere Ionosphere Electrodynamics General Circulation Model) and that of the 2012 version of IRI (International Reference Ionosphere) in African Equatorial Ionization Anomaly (EIA) region through the diurn...
Open access
Research Article10.9734/PSIJ/2014/9748
The title compound [Co (C7H8N4O)2]Cl2.3H2O, has been synthesized and characterized by elemental analysis, IR spectra and single-crystal X-ray diffraction. The title compound crystallizes in a triclinic, space group P-1 with a = 9.3547(5) Å, b = 9.8985(5) Å, c = 12.8840(7) Å, α=10...
Open access
Research Article10.9734/PSIJ/2014/7803
A. Acharyya, P. Sen, E. Chakraborty, P. Sarkar, N. Banerjee, R. Dey, A. R. Mondal, S. Chatterjee & T. K. Sengupta·Physical Science International Journal·2014
In this paper, the authors have proposed a new method for speed control of DC motor drives via modified constant frequency-variable duty (CFVD) pulse width modulation (PWM) technique. The armature of the DC motor rotating in very low speed has to accept abrupt mechanical shocks (...
Open access
Research Article10.9734/PSIJ/2014/9905
Zitterbewegung is the quiver motion discovered by Schroedinger in his 1930 solution of the time-dependent Dirac equation for a free electron. The origin of Zitterbewegung is the interference between positive-energy and negative-energy states. Zitterbewegung is predicted to exist...
Open access
Research Article10.9734/PSIJ/2014/6994
Light transmission in the Sun-Centered Inertial (SCI) frame is considered within a flat space-time metric of relativity theory. It is shown that this metric which is used to derive the Langevin metric that generates the accurate clock synchronization algorithm used in the Global...
Open access
Research Article10.9734/PSIJ/2014/7783
A one- parameter family of totally anisotropic Bianchi type-II string cosmological models with bulk viscous fluid in Lyra geometry is investigated. Exact solutions of Einstein field equations have been obtained by constraining the the constant deceleration parameter which yields...
Open access
Research Article10.9734/PSIJ/2014/8665
Magnetohydrodynamic mixed convection boundary layer flow of a nanofluid near the stagnation-point on a vertical plate with heat generation is investigated for both assisting and opposing flows are well thought-out. Different types of nanoparticles as copper (Cu), alumina (Al2O3)...
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Research Article10.9734/PSIJ/2014/9074
Bianchi type-III model of universe filled with a magnetized perfect fluid together with a time-varying cosmological constant is investigated in general relativity. We assume that F12 is the only non-vanishing component of the electromagnetic tensor Fij . We obtain exact solutions...
Open access
Research Article10.9734/PSIJ/2014/8403
Aims: To investigate the dielectric and electrical properties of nanocomposite films for their application as high-k capacitors Study Design: The ferroelectric polymer PVDF is doped with ZnO nanoparticles (ZnO-NP) to study the dielectric properties Place and Duration of Study: Ma...
Open access
Research Article10.9734/PSIJ/2014/9026