Browsing by Author "Islam, Md. Ziaul"

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Burden of diabetes mellitus: Experience from urban and rural communities of Bangladesh
(University of Dhaka, 2015-04-23) Islam, Md. Ziaul
Diabetes mellitus (DM) is one of the major non-communicable diseases need lifelong care otherwise develop multi-systemic complications in human body. It poses enormous economic and disability burden to the victims, society and the country. Burden of the disease is not well addressed in developing countries. This pertinent study intended to unveil the burden of diabetes mellitus in urban and rural communities of Bangladesh.This comparative cross-sectional study was conducted among 2052 (1026 urban and 1026 rural) participants to compare disability and economic burden of diabetes mellitus between urban and rural communities. The study estimated disability burden in terms of Disability Adjusted Life Years (DALY) and economic burden in terms of ―Cost of Treatment‖ approach from patient perspective. The study also ascertained prevalence and risk factors of diabetes mellitus in both communities. Semi-structured questionnaire, checklist, verbal autopsy, and multi-stage sampling technique were used for data collection. Data analysis included descriptive statistics comprising mean, SD, frequency, proportion, range and percentage and inferential statistics comprising χ2 test,‗t‘ test, and logistic regression.
Design and Implementation of Transformer Protection Scheme Based on Micro PLC
(City University, 2020) Khan, Md. Humayun Kabir; Islam, Md. Ziaul
An electrical power system consists of various components such as generators, switches, transmission cables, transformers, capacitor banks among other components. Within these, a transformer is a very valuable and needy device in a power transmission and distribution system and it needs to be protected from the fault that occurred in the power system. A protection scheme is presented in this paper, which can be used in transformer protection. The main intention of this proposed system is to design a micro- PLC-based system that checks the operating parameters of the transformer i.e., voltage, temperature, oil pressure and the quantity of current that is flowing through the transformer. The system is able to detect current above the normal operating level and isolate the power transformer from the distribution line. This isolation process is to ensure that the transformer is protected from any abundance current that can cause it to overheat consequently to be harmed. In addition, the designed system can isolate the transformer if the voltage, temperature, and pressure are higher than its normal operating value. Some of the tools used in this protection system include LDmicro- programming software to write the ladder logic diagram for the microcontroller. Proteus-simulation software has also been used to design the circuit diagram and the Printed Circuit Board (PCB) for its implementation on hardware.
Design of a Solar PV based Hybrid AC mini grid System with Load Dispatch Centre for an Offgrid Area of Bangladesh
(IJIREEICE, 2021-07) Islam, Md. Ziaul; Shuvo, Al-Amin; Khan, Md. Shawkut Ali
Bangladesh is a developing country with a large population and a smaller area. A large area is still uncovered either by grid electricity or by the electricity generated from renewable sources. Still solar home system is very popular in Bangladesh with some unavoidable constraints. From this perspective, a hybrid AC mini grid system based on solar PV has been designed for an off-grid region of Bangladesh. A survey was held on the rural people of that off-grid area to gather different types of information to design a feasible hybrid AC mini grid system. Cost analysis has been done to set-up the mini grid depending on the information using HOMER software. Furthermore, as it is a hybrid system, others necessary parts have also been prepared to design a complete AC mini grid system. Some indispensable parts of AC mini grid are centralized solar plant, Charge controller, transmission line, energy meter for every consumer and a common Load Dispatch Center (LDC) to control the total system that has been introduced in this paper. Finally, a special grid-tie inverter is designed to hook up the propose system with future National grid. Moreover, a power line carrier communication has been established in order to control every consumer from LDC which can ensure a reliable mini grid system for the off grid area in this paper. This kind of efficient & reliable AC mini grid can be a realistic solution for the off-grid areas of Bangladesh