Dhaka, Bangladesh

Bangladesh University of Business and Technology or BUBT is a private university located in Mirpur, Dhaka, Bangladesh. The university was established under the Private University Act 1992. BUBT is regulated by the University Grants Commission Bangladesh.BUBT was founded in 2003 under the authority of the Private University Act and was approved by the University Grants Commission and the Ministry of Education, Government of Bangladesh. It was modeled after North American universities. It started its operation in the Dhaka Commerce College campus, the founder organization of BUBT. It is running its programs in its own campus at Rupnagar R/A, Mirpur. Classes are also held at Dhaka Commerce College campus. In 2011 UGC has ranked BUBT as one of the best eight private universities. Around 1000 students were awarded with their graduate and post graduate degrees in the first convocation this year .BUBT is the proud member of Association of Commonwealth Universities. Wikipedia.


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Akhter T.,Jahangirnagar University | Hossain M.M.,Bangladesh University of Business and Technology | Mamun A.A.,Jahangirnagar University
Chinese Physics B | Year: 2013

A precise theoretical investigation has been made on the cylindrical and spherical (nonplanar) Gardner solitons (GSs) and double layers (DLs) in a dusty electronegative plasma (composed of inertial positive and negative ions, Maxwellian cold electrons, non-thermal hot electrons, and negatively charged static dust). The reductive perturbation method has been used in derivation of the modified Gardner (MG) equation describing the nonlinear propagation of the dust ion-acoustic (DIA) waves. The MG equation admits solitary waves (SWs) and DLs solutions for σ around its critical value σc (where σc is the value of σ corresponding to the vanishing of the nonlinear coefficient of the Korteweg de-Vries (K-dV) equation). The nonplanar SWs and DLs solutions are numerically analyzed and the parametric regimes for the existence of the positive as well as negative SWs and negative DLs are obtained. The basic features of nonplanar DIA SWs and DLs, which are found to be different from planar ones, are also identified. The implications of our results to different space and laboratory dusty plasma situations, are discussed. © 2013 Chinese Physical Society and IOP Publishing Ltd.


Hoque M.R.,University of Dhaka | Albar A.,King Abdulaziz University | Alam J.,Bangladesh University of Business and Technology
International Journal of Healthcare Information Systems and Informatics | Year: 2016

E-Health is one of the solutions to provide better access for patients and physician to healthcare facilities. In developing countries, e-Health is particularly important due to a shortage of physician and medical workers. Although most physicians in developing countries like Bangladesh acknowledge the benefits of e-Health, low adoption is not uncommon. The objective of this study is to identify the critical factors affecting e-Health adoption among physicians in Bangladesh. A cross-sectional survey questionnaire method was used for this study. The structural equation modeling (SEM) with the partial least square (PLS) approach was used to analyze the data. The study found that Performance Expectancy, Effort Expectancy, Social Influence and Personal Innovativeness had a significant impact on the behavioral intention to use e-Health, while Facilitating Conditions had no significant effect. The findings of this study will facilitate the degree of more acceptance of new technology by the physicians for their own betterment. Copyright © 2016, IGI Global. Copying or distributing in print or electronic forms without written permission of IGI Global is prohibited.


Akhter T.,Jahangirnagar University | Hossain M.M.,Jahangirnagar University | Hossain M.M.,Bangladesh University of Business and Technology | Mamun A.A.,Jahangirnagar University
Physics of Plasmas | Year: 2012

Dust-acoustic (DA) solitary structures and their multi-dimensional instability in a magnetized dusty plasma (containing inertial negatively and positively charged dust particles, and Boltzmann electrons and ions) have been theoretically investigated by the reductive perturbation method, and the small-k perturbation expansion technique. It has been found that the basic features (polarity, speed, height, thickness, etc.) of such DA solitary structures, and their multi-dimensional instability criterion or growth rate are significantly modified by the presence of opposite polarity dust particles and external magnetic field. The implications of our results in space and laboratory dusty plasma systems have been briefly discussed. © 2012 American Institute of Physics.


Haque M.E.,Bangladesh University of Business and Technology | Khan M.N.S.,Rajshahi University of Engineering and Technology | Sheikh M.R.I.,Rajshahi University of Engineering and Technology
ICEEE 2015 - 1st International Conference on Electrical and Electronic Engineering | Year: 2015

As wind turbine output is proportional to the cube of wind speed, the wind turbine generator output fluctuates due to random variations of wind speed. The variation of wind speed causes the variations of Induction Generators (IGs) real and reactive power. These active and reactive power variations interact with the network and thus initiate voltage and frequency fluctuations. These irregularities in power output affect the power quality. It is seen that the power system frequency fluctuation is more severe for 10% capacity of wind power penetration. For continuous fed of more wind power it is necessary additional energy storage systems. Though energy storage device can solve the problem but more energy storage capacity may be needed. But the major problem in wind generator output power smoothing is the setting of the reference power. Constant output power reference is not a good choice because there can be some cases where wind speed is very low and then sufficient power cannot be obtained. This study investigates to generate a suitable reference power performed by Low Pass Filter (LPF), Simple Moving Average (SMA), and Exponential Moving Average (EMA). Finally, among the various methods it shows that the Low Pass Filter (LPF) seems to be more effective. © 2015 IEEE.


Akhter T.,Jahangirnagar University | Hossain M.M.,Bangladesh University of Business and Technology | Mamun A.A.,Jahangirnagar University
IEEE Transactions on Plasma Science | Year: 2013

A precise theoretical investigation is made on ion-acoustic (IA) solitary waves (SWs) and double layers (DLs) in a degenerate multi-ion plasma (composed of inertial positive and negative ions and degenerate electrons). The standard reductive perturbation method is employed to derive the Korteweg-de Vries (K-dV), the mixed K-dV (mK-dV), and the Gardner (GE) equations. The GE admits SW and DL solutions for μ around its critical value μc (where μc is the value of μ corresponding to the vanishing of the nonlinear coefficient of the K-dV equation). The basic features of IA SWs and DLs are analyzed. It is found that the characteristics of IA SWs found from GE are different from those of the K-dV solitons and mK-dV solitons. The implications of our results to different space and laboratory plasma situations, where opposite polarity ions are observed, are briefly discussed. © 1973-2012 IEEE.


Chowdhury A.K.M.R.,Green University of Bangladesh | Mollah Md.E.,Green University of Bangladesh | Rahman Md.A.,Bangladesh University of Business and Technology
2010 The 2nd International Conference on Computer and Automation Engineering, ICCAE 2010 | Year: 2010

Density based clustering algorithms are one of the primary method for data mining. The clusters which are formed using density clustering are easy to understand and it does limit itself to shapes of clusters. Existing density based algorithms have trouble because they are not capable of finding out all meaningful clusters whenever the density is so much varied. VDBSCAN is introduced to compensate this problem. It is same as DBSCAN (Density Based Spatial Clustering of Applications with Noise) but only the difference is VDBSCAN selects several values of parameter Eps for different densities according to k-dist plot. The problem is the value of parameter k in k-dist plot is user defined. This paper introduces a new method to find out the value of parameter k automatically based on the characteristics of the datasets. In this method we consider spatial distance from a point to all others points in the datasets. The proposed method has potential to find out optimal value for parameter k .In this paper a synthetic database with two dimensional data is used for demonstration. ©2010 IEEE.


Islam M.M.,Bangladesh University of Business and Technology
Research Journal of Applied Sciences, Engineering and Technology | Year: 2014

In this study we extend the Hadamard's type inequalities for convex functions defined on the minimum modulus of integral functions in complex field. Firstly, using the Principal of minimum modulus theorem we derive that m (r) is continuous and decreasing function in R+. Secondly, we introduce a function t (r) and derived that t (r) and lnt (r) are continuous and convex in R+. Finally we derive two inequalities analogous to well known Hadamard's inequality by using elementary analysis. © Maxwell Scientific Organization, 2014.


Hasan M.,Bangladesh University of Business and Technology | Hossain M.M.,Bangladesh University of Business and Technology | Mamun A.A.,Bangladesh University of Business and Technology
Astrophysics and Space Science | Year: 2013

Nonplanar (cylindrical and spherical) double layers (DLs) in a quantum dusty plasma (composed of inertial ions, Fermi electrons, and negatively charged immobile dust particles) are studied by employing the reductive perturbation method. The modified Gardner equation describing the nonlinear propagation of the quantum dust ion-acoustic (QDIA) waves is derived, and its nonplanar double layer solutions are numerically analyzed. The parametric regimes for the existence of the DLs, which are found to be associated with both positive and negative potential, are obtained. It has been found that the existence of small but finite amplitude electrostatic double layers depends on β=Zpnp0/Znnn0 (where Zp (Zn) is the charge states for positive ions (negative ions) and np0 (nn0) is the equilibrium positive ions (negative ions) number density) as well as the quantum diffraction parameter, H. It has been also found that the propagation characteristics of nonplanar QDIA DLs are significantly differ from those of planar ones. © 2013 Springer Science+Business Media Dordrecht.


Akhter T.,Jahangirnagar University | Hossain M.M.,Bangladesh University of Business and Technology | Hossain M.M.,Jahangirnagar University | Mamun A.A.,Jahangirnagar University
Astrophysics and Space Science | Year: 2013

A theoretical investigation has been made on the Dust ion-acoustic (DIA) Gardner solitons (GSs) and double layers (DLs) in electronegative plasma consisting of inertial positive and negative ions, super-thermal (kappa distributed) electrons, and negatively charged static dust. The standard reductive perturbation method is employed to derive the Korteweg-de Vries (K-dV), modified K-dV (mK-dV), and standard Gardner equations, which admits solitary waves (SWs) and DLs solutions. It have been found that GSs and DLs exist for α around its critical value αc, where αc is the value of α corresponding to the vanishing of the nonlinear coefficient of the K-dV equation. The parametric regimes for the existence of both the positive as well as negative SWs and negative DLs are obtained. The basic features of DIA SWs and DLs are analyzed and it has been found that the polarity, speed, height, thickness of such DIA SWs and DLs structures, are significantly modified due to the presence of two types of ions and spectral index (κ) of super-thermal electrons. It has also been found that the characteristics of DIA GSs and DLs, are different from that of the K-dV solitons and mK-dV solitons. The relevance of our results to different interstellar space plasma situations are discussed. © 2013 Springer Science+Business Media Dordrecht.


Russell M.,Bangladesh University of Business and Technology | Soiket M.I.H.,Bangladesh University of Engineering and Technology
Organic Communications | Year: 2015

Schiff's base1-[(2,4-difluorophenyl)-2-(1H-1,2,4-triazol-1-yl)]ethanone thiosemicarbazone (compound 1A) wasprepared by condensation of 1-(2,4-difluorophenyl)-2-[1 (H)-1,2,4-triazol-1-yl]ethanone (1)with thiosemicarbazide. The compound 1A, on reaction with α-halogenoketones yielded 1-(2, 4-difluorophenyl)-2-[(1H)-1,2,4-triazol-1-yl] ethanone [2-[4-halogenophenyl] thiazolyl]hydrazone.Anti-fungal activity of all the compounds has been tested against four fungal organism:C. albicans, Colletotrichum spp., A. nigar and Fusarium spp. commonly responsible for fungal infections in Bangladesh. © 2014 ACG Publications.

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