Rangpur, Bangladesh
Rangpur, Bangladesh

Begum Rokeya University , formerly Rangpur University, is a government financed public university in Bangladesh. It is the second public university in Rangpur Division. Wikipedia.

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Habib M.A.,Geological Survey of Bangladesh | Islam A.R.M.T.,Geological Survey of Bangladesh | Islam A.R.M.T.,Begum Rokeya University
Iranian Journal of Earth Sciences | Year: 2014

Detailed log facies studies of Miocene succession in the well Rashidpur-04, Rashidpur structure, Surma Basin were carried out by integrating wireline log and limited core sample data in order to reconstruct the paleoenvironments of deposition. Based on the analysis of the log motifs, grain size, sand/shale ratio and major change in gamma ray log motifs, two major depositional sequences were identified in the well Rashidpur-04 which consists of 17 para-sequences sets and 22 para-sequences. Serrated bell, funnel, cylindrical, egg/bow and linear log facies were recognized in the study well. Lithology indicates that the whole well interval consist of alteration of sandstone, siltstone, shale and prodelta facies. The Rashidpur sequence-2 inferred to be deposited in tidal flat to shallow marine conditions in prograding and retrograding delta front condition whereas the Rashidpur sequence-1 assumed to be deposited under tidal channel, distributary channel, tidal flat, mudflat, marine inter-distributary bay to shallow and deep marine conditions. The Rashidpur sequence-2 was deposited in comparatively deep water condition while the Rashidpur sequence-1 was deposited in relatively shallow water condition. The present study can be concluded that Miocene succession was coarsening upward in nature and might have deposited under prograding deltaic system.

Ashrafi K.S.,Begum Rokeya University | Mamun A.A.,Jahangirnagar University | Shukla P.K.,Ruhr University Bochum
Journal of Plasma Physics | Year: 2014

Polarization force (acting on a dust grain) and its modification by polarity of dust, non-isothermal (viz. non-thermal and trapped) ions, adiabaticity of electrons and ions, etc. have been investigated theoretically. It has been found that the polarization force is significantly modified by these effects, i.e. the magnitude of the polarization force is significantly decreased by the presence of non-thermal ions and by the adiabaticity of electrons and ions. On the other hand, it is significantly increased by the presence of trapped ions. It has been also shown that the magnitude of the polarization force is increased (decreased) by electric potential in the case of positively (negatively) charged dust. The relevance of our investigation to some space and astrophysical plasma situations is discussed. Copyright © 2013 Cambridge University Press.

Rahman M.A.,Begum Rokeya University | Anwar S.,University of Dhaka | Pramanik M.I.,Begum Rokeya University | Rahman M.F.,Begum Rokeya University
International Conference on Advanced Communication Technology, ICACT | Year: 2013

Energy conservation in Wireless Sensor Network (WSN) has always been the most crucial issue, for the sensor nodes are all powered by limited capacity battery sources which are difficult, if not impossible, to replace or recharge due to the inherent nature and types of applications WSN is used for. Therefore, energy efficient design of WSN has drawn considerable attention from many researchers resulting in quite a good number of approaches for saving the precious and limited energy of the sensor nodes. However, designing energy efficient routing protocol for WSN is the area that has received the most of the attention giving rise to many Energy Efficient Routing (EER) protocols. In this paper, a comprehensive list of these EER protocols have been studied having classified them into proper categories. The relative advantages and disadvantages of the protocols are also discussed while the protocols are evaluated based on certain performance metrics at the end of the paper. © 2013 GIRI.

Tasnim I.,Begum Rokeya University | Masud M.M.,Bangladesh University of Engineering and Technology | Mamun A.A.,Jahangirnagar University
Plasma Physics Reports | Year: 2014

The effects of nonextensivity and nonthermality of ions of two distinct temperatures on dustacoustic Gardner solitons (DAGSs) in an unmagnetized dusty plasma system are investigated theoretically. The constituents of the dusty plasma under consideration are negatively charged mobile dust fluid, Boltzmann-distributed electrons, and ions of two distinct temperatures following nonextensive (q) and nonthermal distributions, respectively. The Korteweg-de Vries (KdV), modified KdV, and Gardner equations are derived by using the reductive perturbation technique, and thereby their characteristic features are compared. It is observed that both the nonextensive and nonthermal ions significantly modify the basic properties and polarities of dust-acoustic solitary waves. The present investigation may be of relevance to space and laboratory dusty plasma systems. © 2014, Pleiades Publishing, Ltd.

Abdur Razzak M.,Rajshahi University of Engineering and Technology | Mashiar Rahman M.,Begum Rokeya University
Results in Physics | Year: 2015

In this paper, a new novel energy balance method based on the harmonic balance method is proposed to obtain higher-order approximations of strongly nonlinear problems arising in engineering. Especially, second-order approximation is considered in this paper. Results found in this paper are compared with the exact result and other existing results. The results show that the proposed method gives better result for both small and large amplitudes of oscillation than other existing results. The method is illustrated by examples. It has been shown that the proposed method is very effective, convenient and quite accurate to nonlinear engineering problems. © 2015 The Authors.

Hossain M.S.,Begum Rokeya University | Habib M.A.,Begum Rokeya University
2nd International Conference on Electrical Engineering and Information and Communication Technology, iCEEiCT 2015 | Year: 2015

Finger prints are considered as the best tool of identification. Gender identification from fingerprints is an important step in forensic anthropology in order to identify the gender of a criminal and minimize the list of suspect search. Fingerprint identification and classification has been extensively researched in the literature however very few researchers have studied the fingerprint gender classification problem. In the present work, we proposed an easy and efficient technique to classify gender of a person using systematic fingerprint ridge counting to a valley area. The study was carried out on the age group of 18 to 40 years where the students, workers, housewives etc are taken as the subjects. An optimal threshold for each transform is chosen for better results. It is found that the proposed system produces accurate decision of 85% of male and 74% of female. The overall performance of the system is found to be satisfactory and useful to forensic anthropology. © 2015 IEEE.

Tasnim I.,Begum Rokeya University | Masud M.M.,Bangladesh University of Engineering and Technology | Mamun A.A.,Jahangirnagar University
Journal of the Korean Physical Society | Year: 2014

The fundamental properties of cylindrical and spherical dust-acoustic (DA) waves in dusty plasmas with consisting of negatively charged mobile dust, two populations of nonthermal ions with distinct temperatures, and Boltzmann-distributed electrons, are rigorously investigated both theoretically and analytically. The modified Gardner (mG) equation is derived by using the reductive perturbation method. The basic features of nonplanar DA modified Gardner solitons (mGSs) are analyzed by using numerical solutions of the mG equation. The nature and the basic characteristics of the mGSs are found to be significantly modified by the existence of two-temperature nonthermal ions. The implications of our investigations in understanding the nonlinear electrostatic perturbations observed in some astrophysical and space plasmas, where distinct-temperature nonthermal ions can significantly modify the wave dynamics, are briefly discussed in this current analysis. © 2014 The Korean Physical Society.

Ahad J.S.,Begum Rokeya University | Shakil A.,Begum Rokeya University
2013 International Conference on Electrical Information and Communication Technology, EICT 2013 | Year: 2013

Since 1887 wind has been a reliable source of power in order to address the global challenges of clean energy, climate change and sustainable development. Availability of wind has been always a matter of concern. And economically viable windmills depend most strongly on the quality of wind resource. This wind resource is available from nature. It can be achieved by many other ways. Moving bodies always get enough wind. Vehicles especially trains face much wind flow, which is more than enough to run small wind turbines. Using train compatible wind turbine likely small size, electricity can be generated nicely. We estimated that annually 27299.69378 KW power generations can be available from a particular train which is very much potential in modern energy-crisis era. We showed that, for train, using the electricity to the sub grid, the vehicles can be facilitated more efficiently. © 2014 IEEE.

Kamruzzaman M.,Begum Rokeya University | Dutta R.,City University of Bangladesh | Podder J.,Bangladesh University of Engineering and Technology
Semiconductors | Year: 2012

Cd 1 - xPb xS thin films were prepared by spray pyrolysis technique onto glass substrate at 300°C temperatures. The prepared films were characterized elemental, structural and optical properties by energy dispersive X-ray, scanning electron microscopy, X-ray diffraction and UV-VIS spectrophotometer. Energy dispersive X-ray confirmed the presence of Cd, S and Pb in the films. SEM images show that the deposition covered the substrate well uniformly and incorporation of Pb. Crystal structure was found hexagonal and the estimated grain size was lies in between 9 to 49 nm. The optical band gap was decreased from 2. 43 to 2. 07 eV. © 2012 Pleiades Publishing, Ltd.

Kamruzzaman M.,Begum Rokeya University | Luna T.R.,Bangladesh University of Engineering and Technology | Podder J.,Bangladesh University of Engineering and Technology | Anowar M.G.M.,Begum Rokeya University
Semiconductor Science and Technology | Year: 2012

The Cd 1xCo xS (x = 0.00, 0.10, 0.20 and 0.40) thin films were deposited onto the glass substrate at a temperature of 523 K using a low cost spray pyrolysis technique. The SEM images show that the grain size and the roughness of the films were increased with increasing Co doping concentration. The as-deposited films were amorphous in nature but the annealed samples had a crystalline wurtzite hexagonal structure and the estimated average grain size lay in the range of 7 to 49 nm. The optical band gap of the films was decreased from 2.54 to 2.40 eV. The conductivity and activation energy of the films were decreased with increasing Co content but all the films showed semiconducting behaviour in the measured temperature range. © 2012 IOP Publishing Ltd.

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