Dynamics of Evolutionary Epidemiological SIR Model with Varying Total Population Size

Corresponding Author : M. A. Haque (aminul202@yahoo.com)

Abstract :

Infectious diseases have often had a big impact on population sizes and historical events. Therefore, the constant population size models are not often suitable when the natural births and deaths are not balanced or when the disease-related deaths are significant. Moreover mutation of Pathogens is an important phenomenon of the disease dynamics, as pathogens can reproduce quickly. As a consequence, in this paper the evolutionary behavior of SIR model considering variable population size has been studied. The resident strain and…

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Effect of the Normal Optical Potential on the D(d,n)3He Reaction

Corresponding Author : S. K. Das (skdas-phy@sust.edu)

Abstract :

The optical model parameters were employed in the studies of nuclear reaction D(d,n)3He at several energies within the framework of the DWBA method of direct reaction. Various sets of optical model potentials were tried in the incident channel, while the n- 3He potentials were used in the exit channel. A fairly good description of the reaction was possible. The spectroscopic factors obtained in this way were around approximately half of these expected from the simple shell model. The reaction was…

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Generation of Response Spectra Along With Time History for Earthquake in Dhaka for Dynamic Analysis

Corresponding Author : A.B.M. Saiful Islam (abm.saiful@gmail.com)

Abstract :

Earthquakes subject structures to time varying-forces which, in turn, produce time-varying displacements and stresses within the structures. From a design view point, only the maximum values of displacement and stress are of interest—the variation with time of these quantities is of little consequence. For survival the structure must withstand the peak value whenever that may occur. Therefore only the peak value is needed to be known to successfully design a building and this information is made available in the form…

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In Silico Identification of Suitable Alternative Milk for Human Infants either Allergic or Not to Co

Corresponding Author : Shakhinur Islam Mondal (shakhin2000@yahoo.com)

Abstract :

The issue of nutrition is of great concern in case of infants. Although mother’s milk is the primary source of nutrition for infants, during deficient condition they should be provided with alternative supplement, where cow milk is the general choice. However, cow milk proteins are found to be allergic to few. Milk of some other mammals or soy milk has been tried as alternative protein source to allergic infants. The current study has disclosed the best alternative to mother’s milk…

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Study of Elastic Properties of Ammonium Iodide (NH4I) with NaCl Structure

Corresponding Author : S. M. Sharif (sharif-phy@sust.edu)

Abstract :

Second-order elastic constants, third-order elastic constants and some other lattice properties of NH4I crystal have been calculated here using a modified form of the Born model of ionic solids. In the expression of total energy we have used long-range Coulomb, short-range BornMayer repulsive and van der Waals dipole-dipole, dipole-quadrupole potentials. The shortrange repulsive interactions have been included up to second nearest-neighbors. The present study shows that the computed values of different lattice properties are consistent with the available experimental and…

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The Homomorphism Theorem for JP-semilattices

Corresponding Author : S.N. Begum (snaher@yahoo.com)

Abstract :

A meet semilattice S with a partial binary operation satisfying some conditions is called a JPsemilattice. In this paper we prove the homomorphism theorem for JP-semilattices. We also give a characterization of distributive JP-semilattices.

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A Natural Duality for Quasi-Variety Generated by three Element Residuated Chain

Corresponding Author : M.R. Talukder (r.talukder-mat@sust.edu)

Abstract :

In this paper we obtain the natural duality of the quasi-variety generated by three element residuated chain.  

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Acceleration Techniques for Vortex Method Calculations: Part II

Corresponding Author : T. K. Sheel (tksheel@sust.edu)

Abstract :

Using special-purpose computers, MDGRAPE-3, has developed a fast vortex method. MDGRAPE-3, successor of MDGRAPE-2, has been applied to the same calculations and the improvement in speed was 1000 times faster when compared with the ordinary PC Xeon 5160(3.0GHz) and 25 times compared with MDGRAPE-2 for N=106 . In addition, performances and efficiency have been investigated carefully

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An Accurate Evaluation Procedure of Triangular Domain Integrals

Corresponding Author : Razwan Ahamad (rahamad-mat@sust.edu)

Abstract :

This paper mainly concentrates to present a technique to evaluate exactly the triangular domain integrals with satisfactory degree of accuracy. Hence, the technique instead of the usual Gaussian quadrature formula for triangle will find better place in application when high accuracy is desired. Further, the technique successfully accommodates the readily available Gaussian quadrature formulae for square and therefore it guaranties the high accuracy in evaluating such integrals.  

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Applications of Mixed Number Algebra

Corresponding Author : Md. Shah Alam (shahalam032003@yahoo.com)

Abstract :

Mixed number is the sum of a scalar and a vector. It has satisfactory algebra. In terms of Mixed number, a type of most general Lorentz Transformation can be derived which we called the Mixed number Lorentz Transformation. In this paper we have explained some applications of Mixed number in relativistic aberration, relativistic Doppler’s Effect, Electrodynamics and Quantum Mechanics. It has been observed that the explanation of relativistic aberration and relativistic Doppler’s Effect by Mixed Number Lorentz Transformation is easier…

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