- All Volumes
- Volume 33, issue 1, 2023 (5 papers)
- Volume 32, Issue 1, 2022 (6 papers)
- Volume 32, Issue 2, 2022 (5 papers)
- Volume 31, Issue 1, 2021 (6 papers)
- Volume 31, Issue 2, 2021 (6 papers)
- Volume 30, Issue 1, 2020 (7 papers)
- Volume 30, Issue 2, 2020 (6 papers)
- Volume 29, Issue 1, 2019 (6 papers)
- Volume 29, Issue 2, 2019 (6 papers)
- Volume 21, Issue 1, 2014 (12 papers)
- Volume 16, Issue 1, 2012 (10 papers)
- Volume 19, Issue 2, 2012 (13 papers)
- Volume 20, Issue 3, 2012 (13 papers)
- Volume 14, Issue 2, 2011 (10 papers)
- Volume 12, Issue1, 2010 (16 papers)
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.
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
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.
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…
Mapping Bangla Unicode Text to Keyboard Layout Specific Keystrokes
Corresponding Author : Mohammad Reza Selim (selim@sust.edu)
Abstract :
Bangla Unicode texts are becoming increasingly available from different types of sources. It is necessary for many applications to map these Unicode texts to keystrokes of a particular keyboard layout. In this paper, we analyze Bangla Unicode texts and various keyboard layouts and device algorithms to convert the Unicode texts to keyboard layout specific keystrokes. We implement and test our algorithms with sufficient data and show that they are working correctly. Our work has many applications, e.g., comparing the efficiency…
Bound Orbit of Sub-micron Size Non-spherical Silicate Dust Particles in the Dust Band of the Asteroi
Corresponding Author : M. H. Ahsan (h.ahsan@sust.edu)
Abstract :
Infrared Astronomical Satellite (IRAS) discovered three dust bands in the asteroid belt. These dust bands are believed to arise from the collision activity of asteroids. Dynamics of spherical and non-spherical particles are quite different in these regions. In this study the β values (the ratio of radiation pressure force to the solar gravity) for cylindrical particles have been evaluated. The β value for cylindrical particle strongly depends on the incident angle of radiation. The dependence of β values on the…
Equitable Total Coloring of Goldbers Snarks and its Related graphs
Corresponding Author : Kh. Md. Mominul Haque (momin66@gmail.com)
Abstract :
The equitable total chromatic number of a graph G is the smallest integer k for which G has k
total coloring such that the number of vertices and edges colored with each color differ by at
most one. In this paper, we show that Goldberg snarks and its related graphs have equitable
total 4-coloring.
Evaluation of Triangular Domain Integrals by use of Gaussian Quadrature for Square Domain Integrals
Corresponding Author : M. M. Rahman (mmr-mat@sust.edu)
Abstract :
This paper presents a technique to evaluate the integrals over the triangular surfaces using
readily available Gaussian quadrature for the square domain integrals. As the technique
suitably can employ higher order Gaussian quadrature and have higher degree of accuracy of
the integrals is possible to achieve without resorting to inefficient quadrature for triangles
Gold(I)-Catalysed Hydration of Alkynes in Ionic Liquid Media
Corresponding Author : M. M. Rahman (rmizan@sust.edu)
Abstract :
Gold(I) catalysed hydration of alkynes with water proceeds in ionic liquid media (1-butyl-3-
methylimidazolium hexafluorophosphate). The catalyst/ionic liquid mixture could be recycled
after separation of the product by extraction with hexane.
Harmonious Labelings of Disjoint Union of Cycles
Corresponding Author : Kh. Md. Mominul Haque (momin66@gmail.com)
Abstract :
The disjoint union Cj ∪ Ck ∪ Cl
is component of three cycles Cj
, Ck and Cl
. In this paper, we
show that the disjoint union graph Cj ∪ Ck ∪ Cl
is harmonious for odd j + k + l with l ≥ j + k
+ 5.
Improved Optical Recognition of Bangla Characters
Corresponding Author : M. Shahidur Rahman (rahmanms@sust.edu)
Abstract :
This paper presents a method on improved optical recognition of Bangla characters toward building a working system. The recognition process performs pre-processing of input image, segmentation of both lines, words and characters and then recognizes the characters based on the classifying criteria. Experience with OCR (Optical Character Recognition) problem teaches that for most subtasks involve in OCR, there is no single technique that gives perfect results for all the variations of printed text. Based on the features of Bangla characters,…
Inclined Drift Method for Dispersed Rock Handling of Madhapara Hard Rock Mine, Bangladesh
Corresponding Author : M Farhad Howladar (dmfh75@yahoo.com)
Abstract :
Madhayapara Hard Rock Mine has the annual production target of 1.6 million ton. During the loading and unloading of hard rock to bring it to the surface, certain amount of rock would be dispersed and the dispersed rock should be handled for the economical as well as technical point of view. The inclined drifting ranges between -270m and -334.8m, because -270m is the production level and the arresting bean is situated in -334.8m level. The required width-height ration for the…
Investigation of the Transverse mode of a laser with variation of the Hermite and Laguerre polynomia
Corresponding Author : R. A. Jewel (rausanatik@live.com)
Abstract :
This paper aims at explaining the operation of Hermite and Laguerre polynomials on the Gaussian beam in the case of higher order laser modes. The parameters of Hermite polynomial explain the Hermite–Gaussian laser beam in the Cartesian symmetry and that of Laguerre polynomial explains Laguerre–Gaussian laser beam in the cylindrical symmetry. In this paper it is shown that the Gaussian beam changes its shape as the parameters of the polynomials are changed and the change is explained. There is derivation…
Selection of Economical Span in RCC Building
Corresponding Author : H.M.A.Mahzuz (mahzuz_211@yahoo.com)
Abstract :
In this paper an attempt was taken to determine the most economical span for a conventional
RCC building. To identify that code imposed guidelines along with analysis were followed.
The comparison is made in terms of the required concrete volume and reinforcement.
Comparing all the facts for a given live load it is seen that shorter spans are more economical.
Transformational Generative Grammar for Various Types of Bengali Sentences
Corresponding Author : Mohammad Reza Selim (selim@sust.edu)
Abstract :
In this paper, we analyze the syntax of various types of Bengali sentences and design transformational generative grammar rules for them. Designing machine-processable grammars to recognize and generate various types of Bengali sentences is an important step and prerequisite to develop Bengali natural language applications. However, although few works for designing grammars are found, they mainly deal with on assertive sentences. Besides, those grammars are phrase structure grammars and can only work on strictly formal sentences. Many natural language sentences…
Transient Diffraction Efficiency and the Role of the Deep Center Levels in BaTiO3 Crystal
Corresponding Author : Y. Haque (yasmeen@sust.edu)
Abstract :
The charge transport model has been applied to the photorefractive crystal. Shallow & Deep levels have been accounted for in the formulation of the charge transport equations. It is assumed that the writing beams excite the shallow level charges where as the electrons from the deep level are the ones excited into the conduction band by the reading beam. An appreciable fraction of these electrons recombine with the deep level holes. The electron-hole recombination rate is dependent on the excitation…