Volume 14 – Issue 4

This paper studies the generalized Poisson summation formula from the extended fractional Fourier transform point of view and derived several new formulae associate with the extended fractional Fourier transform. The generalized Poisson sum formula is obtained based on the relationship of the extended fractional Fourier transform and the Fourier transform. Then we derived some results associated with the generalized Poisson sum formula.

In this paper, we apply Sumudu Decomposition Method for solving Goursat problems which play very important part in applied and engineering sciences. In addition we apply He’s polynomials for non linear terms. Several examples are solved to verify the reliability and efficiency of the method.

The human factor is known as being one of the key factors through which the organization may obtain success [1]. Only attracticng, recruiting and maintaining those right candidates, with proper skills, knowledge and competencies, an organization may obtain performance in a global competiting environmet, dynamic and in continuos change [2]. Performance of a recruitment and selection process depends on the internal and external (IE) factors, which are analyzed in our article. We implemented the Kalman filter on a new area, that of HR recruitment and selection, because is well known that this model has been used in engineering, or in finance. This will help us to find new solutions, to develop new strategies, to improve forecast accuracy, to improve communication in recruitment and selection processes, to know its limits and to overcome its inefficiecies and also, to establish in what measure each factor, internal or external, will influence our analyzed processes.

This paper deals with the advancements of Mathematics achieved by Indian Civilization in ancient period. It is noteworthy that many branches of mathematics were parallelly developed. Their applications in many areas highlight the profound understanding of the subject developed

In this paper we prove some properties of limit sets of subsets in a metric space. We also prove that if the limit set of a subset is compact then it should be connected.

The study back to the equilibrium state of Pb-Cd-Bi alloys was carried out by various experimental techniques such as hardness, microhardness, optical microscopy and X-ray diffraction. Two structural states were considered: raw casting alloy and rehomogenized alloy, their compositions are: Pb2% Cd1% Bi; Pb2% Cd2% Bi; Pb2% Cd3%Bi and Pb3.2% Cd2% Bi. The experimental temperatures are 20 °C and 80 °C. The latter one was chosen because it corresponds to the temperature of ripening of battery grids and the hot temperature for battery working. In general, the addition of bismuth accelerates the kinetics of transformation and hardness increases. While the addition of cadmium slightly increases the hardness and accelerates kinetics. The aging, which is the hardening step of the alloy, is still characterized by a discontinuous reaction and a hardening processing, while the overaging is characterized by a softening discontinuous precipitation.

This article analyze the chemically reacting free convection MHD micropolar flow, heat and mass transfer past an infinite vertical plate with heat annihilation and viscous dissipation. The non-linear coupled partial differential equations are solved by using multi parameter perturbation technique. The results for transverse velocity, angular velocity and temperature are obtained and effects of various parameters on these functions are presented graphically. The numerical discussion with physical interpretations of various parameters also presented.

The effect of cold electron beam on oblique propagating electromagnetic electron cyclotron (EMEC) wave has been studied by using the unperturbed Lorentzian (Kappa) distribution in the magnetosphere for relativistic plasma. The dispersion relation is obtained following the method of characteristic solutions and kinetic approach. An expression for the growth rate of a system has been calculated. It is inferred that in addition to the relativistic plasma obliquity and effect of cold electron beam modifies the growth rate and it also shifts the wave band significantly. The relativistic electrons by increasing the growth rate and widening the bandwidth may explain a wide frequency range of EMEC wave emissions in the magnetosphere.