Browsing by Author "Chakrabarty, Anuz Kumar"

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Measuring the Customer Satisfaction Level of 3G Services in Bangladesh
(2015-02-15) Hadi, Reza Shahbaz; Chakrabarty, Anuz Kumar
Abstract: The telecommunication industry of Bangladesh has been observing a dynamic shift from talk time based business to data based business. The intervention of 3G services has opened up newer ways to satisfy the consumers. This study tries to measure the level of customer satisfaction of 3G services in Bangladesh. The purpose of this research is to identify the factors that result in greater customer satisfaction. Findings of previous studies related to this issue are taken into consideration in this article. Fifteen (15) correlated variables are selected from related literatures. Factor analysis has been conducted to reduce the number of total variables. Bartlett’s test of Sphericity has been used along with the Kaiser-Meyer-Olkin (KMO) statistic. Apart from factor analysis, some other frequency tables and various diagrams are also developed to describe the market scenario. SPSS 16.0 has been used to analyze the data collected from primary sources through stratified sampling technique.
Modulation instability analysis, and characterize time-dependent variable coefficient solutions in electromagnetic transmission and biological field
(2024-09-24) Chakrabarty, Anuz Kumar; Uddin, Sonia Akter, Mahtab; Mamunur Roshid, Md.; Abdeljabbar, Alrazi; Harun Or-Roshid
This study integrates the telegraph model with the traveling wave coefficient. This model characterizes planar random motion of particles in fluid flow, pressure waves from pulsatile blood flow in arteries, electrical impulses in nerve and muscle cell axons, and electromagnetic waves in superconducting media. Using the efficient and well-established Enhanced Modified Simple Equation (EMSE) method, we investigate solitary wave solution with the variable coefficient of the telegraph model. To investigate the variable coefficient solitary wave solution, we apply a transformation variable η = h(t)x + g(t), which is dependent on the time variable function. The diverse functions of h(t) and g(t) yield many novel and exclusive solutions. Numerical solutions are plotted in 3D, density, and 2D. instanton soliton, kinky periodic wave, lump wave, kink wave, anti-kink wave, double periodic wave, diverse types periodic wave, lump with bell wave periodic wave, periodic lump wave, etc. Solitary waves explain complex wave phenomena through nonlinear effects like self-interaction and dispersion. Due to the classical nonlinear telegraph model's wave dynamics, they are used in brain function and communication system design. We conclude by testing the governing model's modulation instability. Dispersive and nonlinear processes modulating the stable state cause instability in high-order nonlinear equations. Examining the wave movement role and modulation instability analysis to assess solution stability shows that all solutions are accurate and stable. The computational difficulties and results demonstrate the approaches' clarity, effectiveness, and simplicity, suggesting they can be applied to evolutionary dynamic and static nonlinear equations in computational physics, other real-world situations, and numerous academic
Modulation Instability Analysis, and Characterize Time-dependent Variable Coefficient Solutions in Electromagnetic Transmission and Biological Field
(Elsevier, 2024-06-10) Chakrabarty, Anuz Kumar; Akter, Sonia; Uddin, Mahtab; Roshid, Md. Mamunur; Abdeljabbar, Alrazi; Or-Roshid, Harun
This study integrates the telegraph model with the traveling wave coefficient. This model characterizes planar random motion of particles in fluid flow, pressure waves from pulsatile blood flow in arteries, electrical impulses in nerve and muscle cell axons, and electromagnetic waves in superconducting media. Using the efficient and well-established Enhanced Modified Simple Equation (EMSE) method, we investigate solitary wave solution with the variable coefficient of the telegraph model. To investigate the variable coefficient solitary wave solution, we apply a transformation variable η = h(t)x + g(t), which is dependent on the time variable function. The diverse functions of h(t) and g(t) yield many novel and exclusive solutions. Numerical solutions are plotted in 3D, density, and 2D. instanton soliton, kinky periodic wave, lump wave, kink wave, anti-kink wave, double periodic wave, diverse types periodic wave, lump with bell wave periodic wave, periodic lump wave, etc. Solitary waves explain complex wave phenomena through nonlinear effects like self-interaction and dispersion. Due to the classical nonlinear telegraph model's wave dynamics, they are used in brain function and communication system design. We conclude by testing the governing model's modulation instability. Dispersive and nonlinear processes modulating the stable state cause instability in high-order nonlinear equations. Examining the wave movement role and modulation instability analysis to assess solution stability shows that all solutions are accurate and stable. The computational difficulties and results demonstrate the approaches' clarity, effectiveness, and simplicity, suggesting they can be applied to evolutionary dynamic and static nonlinear equations in computational physics, other real-world situations, and numerous academic disciplines.
Tracking Selection Criteria of Solar Panels on Consumer Market in Bangladesh
(Daffodil International University, 2016-06) Chakrabarty, Anuz Kumar; Hadi, Reza Shahbaz
Abstract: Among the extrinsic problems faced by the people of Bangladesh, load shedding carries much weight. This study prescribes a solution by offering a feasible alternative source of energy: solar panel. Solar panels are effective in providing an equivalent amount of energy at a reasonable cost compared to existing power plants. Though there is usage of solar panels in Bangladesh, the concept is not commercially prevailed for consumer markets in remote areas. The main objective of the study is to provide a blend of different attributes that consumers may consider for purchasing solar panels. By conducting depth interviews, 3 key attributes have been derived, i.e., capacity, installment, and price; along with different levels. 48 respondents were offered 20 different profiles of attribute levels to put ratings at a 100-point scale. It has been found from the analysis that people mostly prefer 100 watt panels to purchase in 12 installments each for BDT 1500-2000. Yet, corporations in Bangladesh have scope to work on it and commercialize efficiently.
Trend Second Wave Covid-19 Pandemic in Bangladesh
(Daffodil International University, 2021-07-17) Paul, Anip Kumar; Chakrabarty, Anuz Kumar
The aim of this study is to analyze the trend of spreading out coronavirus (COVID-19) for the second wave attack in Bangladesh during this winter season. In this study, we included all reported new confirmed and death cases from March 30 to December 14, 2020. Our intension is to explore the trend of dispersion in infected and death cases after January, 2021. In this paper, we have conducted statistical analysis of Covid-19 in Bangladesh to deliver with reliable and perfect forecasts of the outbreak. We used MS excel and SPSS software for regression analysis and found the slope of the trendline of the data and R-squared value for both infected and death cases. The new confirmed cases gradually increase with date (from March, 30 to June) and reach towards the peak for first wave attack. We get the slope of the trendline for infected case which is increasing first as 2    47.562, 0.8799 R and decreasing later as 2     20.709, 0.6816 R (from July to September) for first wave. After then again, the slope is increasing. Death cases are also following the same trend pattern. This analysis may help to take significant role for securing public health for Bangladeshi people. In this situation, Bangladesh needs to take emergency management system to protect the attack of the virus which we going to face for second wave. As well as people should concern about the guidelines provided by IEDCR and WHO up to get vaccine.