Browsing Department of Mathematics and Natural Sciences (MNS) by Title
Now showing items 426-445 of 644
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Nationwide surveillance on enteric fever to estimate the disease burden in Bangladesh
(BRAC Univeristy, 2016-07)Enteric fever is a life threatening febrile illness caused by Salmonella Typhi and Paratyphi found highly prevalent in developing countries like Bangladesh. The government and non-government organization is working together ... -
Neuro-fuzzy based joint relay-selection and resource-allocation for cooperative networks
(© 2011 Transactions on Electrical Engineering, Electronics, and Communications, 2011-02)This paper focuses on a joint relay-selection and resource-allocation algorithm for an Amplify-and-Forward (AF) cooperative network. In a multiuser scenario, joint relay selection and power allocation is a combinational ... -
Neuro-fuzzy-based hand-off and opportunistic spectrum access for cognitive cooperative network
(© 2012 Inderscience Enterprises, 2012-04)This paper investigates neuro-fuzzy (NF)-based opportunistic spectrum access and spectrum hand-off (HO) for a cognitive cooperative network (CCN). The main aim is to increase the average throughput of the CCN. Secondary ... -
New approach of (G'/G)-expansion method for RLW equation
(© 2014 Maxwell Science Publications, 2014)In this study, new extension of the (G'/G)-expansion method with nonlinear ODE has been introduced to investigate the generalized regularized long wave equation. Therefore, many new travelling wave solutions with many ... -
New approach of (G′G)-expansion method and new approach of generalized (G′G)-expansion method for nonlinear evolution equation
(© 2013 AIP Advances, 2013)In this article, new (G′G)-expansion method and new generalized (G′G)-expansion method is proposed to generate more general and abundant new exact traveling wave solutions of nonlinear evolution equations. The novelty and ... -
New traveling wave solutions by the extended generalized Riccati equation mapping method of the (2 + 1) -dimensional evolution equation
(© 2012 Journal of Applied Mathematics, 2012)The generalized Riccati equation mapping is extended with the basic (G ′ / G) -expansion method which is powerful and straightforward mathematical tool for solving nonlinear partial differential equations. In this paper, ... -
New traveling wave solutions of the higher dimensional nonlinear evolution equation by the improved (G′/G) expansion method
(© 2012 World Applied Sciences Journal, 2012)In this article, we investigate the nonlinear evolution equation, namely, the (3+l)-dimensional modified KdV-Zakharov-Kuznetsev equation by applying the improved (G′/G)-expansion method to construct some new traveling wave ... -
New traveling wave solutions of the higher dimensional nonlinear partial differential equation by the exp-function method
(© 2012 Journal of Applied Mathematics, 2012)We construct new analytical solutions of the (3+1)-dimensional modified KdV-Zakharov-Kuznetsev equation by the Exp-function method. Plentiful exact traveling wave solutions with arbitrary parameters are effectively obtained ... -
Ni0.48Cu0.12Zn0.40Gd0.04Fe1.96O4 (Ferrite) sample preparation, planetary ball milling and calcination
(BRAC University, 2017-06)The purpose of the internship was to provide with a firsthand experience on how to measure and prepare a precise amount of the ferrite composite, Ni0.48Cu0.12Zn0.40Gd0.04Fe1.96O4 which was then further planetary ball milled ... -
Non-local gravitational interactions and the black hole information paradox
(Brac University, 2019-12)This thesis looks into Non-local gravitational interactions that hawking radiated quanta’s from Black holes might possess. We shall first explain Hawking’s original calculation in [1], and how such a process would lead to ... -
Nonperturbative phenomena in field theory and gravity, and use of Borel summation to capture nonperturbative information
(BRAC University, 2017-12)This thesis addresses non-perturbative phenomena and techniques to analyze nonperturbative problems. First, we discuss the simplest non-perturbative example in quantum gravity: blackholes, and how they non-perturbatively ... -
A novel approach for predicting the evolutionary origin of acquisition of foreign genes in bacteria: application of codon usage analyses
(BRAC University, 2009)Lysogenic bacteriophages, are considered as a major player for the introduction of foreign genes into bacterial strains. At the time of introduction foreign genes do not fit well into the translation system of the recipient ... -
Numerical Modeling of storm surge for the coastal region of Bangladesh
(Brac University, 2022)This study investigates the estimated water levels during a cyclonic storm due to the interaction of tide and surge which also includes air bubble entrainment along the coastal areas of Bangladesh. Thus, a two-dimensional, ... -
'O antigenic' polysaccharide specific memory B cell responses in Bangladeshi Cholera patients infected with Vibrio cholerae O1
(BRAC University, 2015-03)Cholera, caused by Vibrio cholerae O1/O139, is an acute dehydrating enteric disease with high mortality rate if untreated. Several efforts have been made to develop effective vaccines, and effort is still continuing. The ... -
Omicron, delta, and beta, deadliest among SARS-CoV-2 variants: an in silico analysis
(Brac University, 2023-01)SARS-CoV-2 has a higher mutation rate since it is emerging in Wuhan, China, and has a high propensity for mutation as it contains RNA as its genome. Because of its high transmissibility and new variants constantly mutating, ... -
On some general relativistic compact anisotropic charged stellar models
(BRAC University, 2015-07-15)With the presence of electric charge and pressure anisotropy some anisotropic stellar models have been developed. An algorithm presented by Herrera et al. (Phys. Rev, D 77, 027502 (2008)) to generate static spherically ... -
Optical characterisation of single junction monocrytalline silicon solar cell
(BRAC University, 2015-01)In this paper the character of a solar cell in terms of minority carrier diffusion length through surface photovoltage (SPV) technique is studied. SPV is measured with respect to wavelength where the spectral range is ... -
Optical solitons in negative-index meta-materials
(© 2013 IEEE, 2013)The nonlinear propagation of gigahertz electromagnetic wave propagation in the resonant region of a negative index meta-material is investigated. It is found that the negative refractive index is maintained within a narrow ... -
Optimization of alkaline protease production by Bacillus licheniformis MZK05M9 in batch culture using response surface methodology
(BRAC University, 2014-09)Bacterial alkaline protease has got its particular eco friendly technical applications in leather processing, detergent and feathers digestion to feed in Bangladesh. The present study is aimed at the optimization of major ... -
Optimization of immunodot blot assay for diagnosis of Typhoid and Paratyphoid fever using the TPTest for comparison
(BRAC University, 2014-07)Typhoid and paratyphoid (enteric) fever are responsible for morbidity and mortality worldwide. Bangladesh is an endemic zone of enteric fever where sanitation and hygienic conditions are poor. Rapid, accurate diagnosis ...