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Articles by M. Nazrul Islam
Total Records ( 3 ) for M. Nazrul Islam
  Kh. Asaduzzaman , M. Nazrul Islam , M. Shahjamal and Mahbubul Hoq
  A low-powered (4.5-5 V) security alarming system using infrared sensor and detector mechanism has been constructed and tested. An IR transmitter (IR diode) and a receiver (Photo transistor) have been used. The system is connected to a multidirectional buzzer/siren or any kind of sounder to alert people from any threat to make sure the property is completely protected.
  M. Nazrul Islam , Md. Rezaul Karim and Q.M. Safiqul Islam
  The study revealed that there was no significant difference in agronomic practice and input use for blackgram cultivation both for BARImash-1 and local variety. But significant difference was found incase of yield between BARImash-1 and local variety, and it was found 35% higher for improved variety than local variety of blackgram. Result of multiple regression model using dummy variable shows that BARImash-1 had a positive significant impact on production of blackgram in the farmers fields. It also implies that in existing situation, if the local variety could be replaced by BARImash-1, per hectare Tk.4542.00 would increase production in monetary term.
  M. Nazrul Islam , A.K.M.S. Islam Bhuian , Masud Kamal , Kh. Asaduzzaman and Mahbubul Hoq
  Solar inverter topology for single phase grid connected or stand alone applications along with microcontroller based Maximum Power Point Tracking (MPPT) has been presented in this study. The PV array consists of only 12 V cell arrangement for the topology. About 1 V 50 Hz signal has been superimposed with the carrier frequency of 1080 Hz in the discrete PWM generator which is suffice for the desired output/grid voltage. This topology has been designed with modern switching devices of IGBT-Diode, 3-winding ideal transformer and a suitable harmonic filter that gives the CTHD of only 2.26%. The microcontroller based MPPT scheme adorned with Constant Voltage (CV) or open voltage ratio method algorithm to control the operation of the topology. The whole process has been performed by MATLAB/Simulink and simulation results have been presented.
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