Search

Your search keyword '"M. Nasir Uddin"' showing total 261 results
Start Over Author "M. Nasir Uddin"
261 results on '"M. Nasir Uddin"'

1. Backtracking Search Algorithm Based Fuzzy Charging-Discharging Controller for Battery Storage System in Microgrid Applications

Author

M. Faisal, M. A. Hannan, Pin Jern Ker, and M. Nasir Uddin

Subjects
Fuzzy controller, state of charge, battery energy storage, optimization, charging-discharging, microgrid, Electrical engineering. Electronics. Nuclear engineering, TK1-9971
Abstract

This paper presents an efficient fuzzy logic control system for charging and discharging of the battery energy storage system in microgrid applications. Energy storage system can store energy during the off-peak hour and supply energy during peak hours in order to maintain the energy balance between the storage and microgrid. However, the integration of battery storage system with microgrid requires a flexible control of charging-discharging technique due to the variable load conditions. Therefore, a comparative evaluation of the developed model is analyzed by considering controllers with fuzzy only and optimized fuzzy algorithms. In this paper, backtracking search algorithm based fuzzy optimization is introduced to evaluate the state of charge of the battery by optimizing the input and output fuzzy membership functions of rate of change of the state of charge and power balance. Backtracking search algorithm is chosen due to its high convergence speed, and it is good for searching and exploration process with exploiting capabilities. To validate the performance of the developed controller, the obtained results are compared to the results obtained with the particle swarm optimization based fuzzy and fuzzy only controllers, respectively. Results show that the backtracking search algorithm based fuzzy optimization outperforms the other control methods in terms of effectively manage the charging-discharging of the battery storage to ensure the desired outcome and reliable microgrid operation.

Published
2019
Full Text
View/download PDF

12. A genetically encoded BRET-based SARS-CoV-2 Mpro protease activity sensor

Author

Anupriya M. Geethakumari, Wesam S. Ahmed, Saad Rasool, Asma Fatima, S. M. Nasir Uddin, Mustapha Aouida, and Kabir H. Biswas

Subjects
Chemistry, QD1-999
Abstract

The main protease (Mpro) of SARS-CoV-2 is an important target for COVID-19 therapy. Here, a pair of genetically encoded BRET-based sensors for detecting Mpro activity are generated by sandwiching N-terminal autocleavage sites in between the mNeonGreen and NanoLuc proteins.

Published
2022
Full Text
View/download PDF

36. Nickel(II) Complexes of Octamethyl Tetraazamacrocycle and its N-Pendent Derivative: Syntheses, Characterization, Electrolytic Behaviour and Antimicrobial Activities

Author

Ruhul Amin, Saswata Rabi, Lira Barua, M. Nasir Uddin, M. Imtiaz Morshed, Ismail M.M. Rahman, and Tapashi Ghosh Roy

Subjects
General Chemistry
Abstract

Octamethyl tetraazamacrocycle, Me8[14]diene·2HClO4 and its three isomeric ligands (LA, LB and LC) were synthesized and characterized using analytical and spectroscopic data, and the antibacterial activities were evaluated against selected bacteria and yeast. Interaction of LC with excess acrylonitrile resulted in an N-pendent derivative (LCX). Square planar nickel(II) diperchlorate complex of LC, [NiLCα](ClO4)2, underwent axial addition reactions with KI and NaNO2 to yield six coordinated octahedral species, [NiLCαI2]·2H2O and [NiLCα(NO2)(ClO4)]. Five coordinated square pyramidal Ni(II) complexes, [NiLCXCl](ClO4), [NiLCX(NCS)](NO3) and [NiLCXI](NO3), were synthesized from Ni(II) salts and tetraazamacrocyclic ligand LCX. Among the complexes, [NiLCXCl](ClO4) was synthesized through the direct interaction of NiCl2 with LCX, followed by the subsequent addition of NaClO4·6H2O. On the other hand, [NiLCX(NCS)](NO3) and [NiLCXI](NO3) as well as octahedral [NiLCXBr2] and [NiLCX(NO2)(NO3)] were synthesized by the interaction of LCX with different Ni(II) salts.

Published
2023
Full Text
View/download PDF

37. Design and Implement of Dual Axis Solar Tracker System Based Arduino

Author

Khalaf S Gaeid, M Nasir Uddin, Mohamed K Mohamed, and Omar N Mohmmoud

Subjects
Photovoltaic (PV), Solar Tracker, Sensor Light-Dependent Resistor (LDR), LM35, Relay, Satellite motor, Engineering (General). Civil engineering (General), TA1-2040
Abstract

The computer control plays important role in the solar cell design and development of dual axis solar tracker for the sun's position. The main goal of this paper is to maximize energy output to reduce panel temperature (cooling), to increase efficiency of the PV panel. Small-scale solar is developed through a complete hardware and software in order to function accurately. The main parts in this work are Arduino Uno R3, kit relay, LDR (Light Dependent Resistor), LM35 (temperature sensor), high-efficiency solar panel and satellite motor. The Protuse software is used with (Arduino Uno) as embedded computer control. The results show the effectiveness of the complete tracking system.

Published
2020
Full Text
View/download PDF

45. The role of leaf surface characteristics in the mediation of pesticide availability to invertebrates

Author

Chowdhury, A. B. M. Nasir Uddin

Subjects
577, Ecology
Abstract

The role of leaf surface characteristics in mediating the toxicity of the pesticides deltamethrin and dimethoate to the springtail F. candida and a parasitoid A. colemani has been studied. This study is important for the interpretation of the behaviour of foliar applied pesticides on various plant surfaces and the subsequent transfer of toxicant to the target invertebrates. There have been few quantitative assessments of the fate of pesticide deposits and their action in various crops. Bioassays on residues showed significant differences in mortality of F. candida on different leaf types. On deltamethrin treated surfaces LD₅₀ values ranged from 6.36 (g AI ha⁻¹) to 77.14 (g AI ha⁻¹). Significant differences in F. candida mortality on three species of cereal crops suggest that it may be necessary to recommend different application rates for different crops, instead of adhering to a conventional single application rate. On dimethoate treated surfaces the range of LD₅₀ values was 1.35 to 8.69 g AI ha⁻¹. F. candida was found to survive on some leaf surfaces that had been sprayed with deltamethrin at a rate of 16 times greater than the field rate. On dimethoate treated surfaces mortality was observed on some leaf surfaces sprayed with over 100 time less pesticide than used in the field. The amount of wax on various leaf surfaces was positively correlated with the residual toxicity of deltamethrin to F. candida and A. colemani. The lipophilicity of deltamethrin may be an important factor in this correlation. No such relationship between the epicuticular wax content of various leaf types and residual toxicity of dimethoate to F. candida was observed despite significant differences in mortality on different leaf surfaces This highlights the importance of the nature of the active ingredient, the formulation of pesticide, and other leaf surface characteristics in mediating toxicity.

Published
1998

Catalog

Books, media, physical & digital resources
See catalog results