Papers by Md. mohaiminul Islam
2019 1st International Conference on Advances in Science, Engineering and Robotics Technology (ICASERT)
This paper implies and demonstrates a unique Smart Autonomous power and switch controlled Led Str... more This paper implies and demonstrates a unique Smart Autonomous power and switch controlled Led Street Lighting System for Bangladesh. As we live in the age of globalization where streetlights are very much important for a city infrastructure in the crowded regions, the autonomous power and switching of these streetlights can have a huge impact in our electricity usage and minimize the wastage of electricity. Usually street light is needed at the time of sunset until the sunrise, but during peak hours (time 17:00 pm to 20:00 pm), the electricity demand is higher than electricity supply from the National Grid for many under developing countries including Bangladesh as this is the high time of excessive usage of Home Loads like Television, Air-Cooler etc. Proposed herein is a design and practically implementation of a smart autonomous power and switch controlled street light system by using stored solar energy during peak hours and light dependent resistor based energy efficient automatic Streetlight switching rather than the conventional switching operations. Besides temperature sensor and Real time clock (RTC) are being attached to display the updated time and temperature to the nearby passengers of the vehicles and walkers of the street sides. Thus, proper implementation of the proposed system will be able to be a medium for an energy efficient circuit, national grid’s power scarcity minimizer and free cost of energy and high reliability.
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Molecular Physics, 2021
The aggregation of the mixture of anionic surfactant – sodium dodecyl sulfate (SDS), and an anion... more The aggregation of the mixture of anionic surfactant – sodium dodecyl sulfate (SDS), and an anionic dye – bromocresol green sodium salt (BCG) was investigated by conductometric technique in water and alcoholic/diolic media within a temperature range of 300.55–320.55 K (with 5 K interval). The observed critical micelle concentration (cmc) decreases with surging of the concentration of BCG, following the same trend for β value. In presence of additives (ethanol, propanol, and ethylene glycol), the cmc value decreases up to a certain concentration and then the cmc values start enhancing with increasing concentration in all the cases. With the increased additive percentage, the β values continually decrease. Again, the cmc value increases gradually with the increase of temperature both in water and aq. additives media. The free energy of studied aggregation phenomena is negative which experiences an augmentation with the escalation of temperature. The increased negative value of free energy at elevated temperature indicates that the process becomes more spontaneous at a higher temperature. The and values reveal that the probable interaction forces between BCG and SDS are hydrophobic, ion-ion, as well as electrostatic interactions. GRAPHICAL ABSTRACT
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Papers by Md. mohaiminul Islam