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 (...
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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...
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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...
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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...
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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...
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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...
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Research Article10.9734/PSIJ/2014/9026
The radial flux density in the air-gap of rotating machines sets up a force of attraction between the stator and the rotor surfaces. In a symmetrical machine, the radial stresses distributions are balanced resulting in zero net force on the rotor. However, if the rotor of a rotat...
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Research Article10.9734/PSIJ/2014/5713
In this paper, a plasma electrolytic oxidation (PEO) coating was prepared on AZ91 magnesium (Mg) implant to improve its degradation resistance, bioactivity and biocompatibility. The phase composition and surface morphology of the samples were characterized using X-ray diffraction...
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Research Article10.9734/PSIJ/2014/9265
The optical functions and effective masses of electrons and holes of ternary compound InGaTe2 crystallizing in a tetragonal syngony are calculated in the energy interval 0-12eV using pseudo-potential method. Imaginary and real parts of dielectric permeability, optical conductivit...
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Research Article10.9734/PSIJ/2014/7555