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Articles by M. Nazrul Islam
Total Records ( 4 ) for M. Nazrul Islam
  M. Nazrul Islam , Kh. Assaduzzaman and Mahbubul Hoq
  In this study, a comphrehensive study on electronic behaviour, economics and social impacts of energy conversion from solar cell have been presented. A solar cell or photovoltaic cell is a device that converts light energy into electrical energy. Sometimes, the term solar cell is reserved for devices intended specifically to capture energy from sunlight while the term photovoltaic cell is used when the light source is unspecified. Fundamentally, the device needs to fulfill only two functions: photogeneration of charge carriers (electrons and holes) in a light-absorbing material and separation of the charge carriers to a conductive contact that will transmit the electricity. This conversion is useful for solar home system, water pumping and small business.
  M. Nazrul Islam , Gordon R. Port and Athol J. McLachlan
  The freshwater snail, Lymnaea peregra (Muller) is widely distributed in the UK and is probably the commonest species in Europe. Culture of L. peregra in laboratory conditions have paid attention to foods, temperature and water quality, and these directly affect the life history traits, such as growth rate, age of maturation and fecundity. The occurrence of the herbicide, simazine in freshwater habitats does not only have a direct effect on the distribution of snails, but may also have indirect effects on both higher and lower trophic levels. It is more important to determine the influence of herbicides on the population densities of a snail which is needed for both ecological balance and economic importance.
  M. Nazrul Islam , Kh. Asaduzzaman and Mahbubul Hoq
  In this study, researchers attempt to describe a 4-digit micontroller based Nuclear Counting System. The system includes PIC microcontroller as the key device that avoids lots of conventional analog circuitry. Hence, the system is compact, low cost, least noise, better accuracy and independent of nominal memory mapping. The system has been designed with GM detector and locally developed high voltage power supply. MPlab, assembly language program development environment, controls the operation of the designed system. The system has been tested with standard pulser from accredited manufacturer for its performance verification.
  M. Nazrul Islam , Kh. Asaduzzaman , Md. Shahzamal , Md. Nasrul Haque Mia , M.S. Alam , Mahmudul Hasan and Mahbubul Hoq
  A UWB bandpass filter has been presented in this study. The filter has been designed on a silicon substrate with Perfect Electric Conductor (PEC) microstrip parallel-coupled stub resonators. The filter comprises of Wave port, Infinite Ground Plane and 1 GHz bandwidth with centre frequency, f0 being 1.5 GHz ranges from 0.6-2.4 GHz. The filter has been designed and verified by HFSS simulation.
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