Browsing by Author "Jahidul Islam"

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Electron Matter-wave Tractor Beams: Study & Simulation of Quantum-Mechanical Stress and Force
(North South University, 2022) Md. Arifur Rahman; Md. Mahabub Alam Arafin; Jahidul Islam; Dr. Mahdy Rahman Chowdhury
Classical force equations describing the macroscopic universe have been studied and applied extensively throughout the past three centuries. However, the study & simulation of quantum-mechanical stress & force in the microscopic domain remain scantily explored. We attempt to accelerate the research of microscopic scenarios involving quantum-mechanical forces and successfully devise a COMSOL Multiphysics simulation setup and derive all the corresponding mathematical formulations to observe a wide array of quantum-mechanical phenomena, in particular, the simulation of electron matter-wave tractor beams in COMSOL Multiphysics 6.0.
Living condition in the Rohingya settlement camp in Kuthupalong at Ukhiyacox's Bazar
(Department of Architecture, BUET, 2025-01-25) Jahidul Islam; Gomes, Dr. Catherine Daisy
The Kutupalong Rohingya settlement camp, situated in Ukhiya, Cox’s Bazar, Bangladesh, is one of the largest and most densely populated refugee camps in the world. Established to provide temporary refuge for the Rohingya community fleeing persecution in Myanmar, the camp currently shelters approximately 1,003,394 refugees who arrived during a significant influx beginning in August 2017 (UNHCR, 2024). The Rohingya, a Muslim minority group, have sought safety and the opportunity to rebuild their lives in 34 makeshift camps within the Kutupalong area (Mohajan H. K, 2018). These camps are characterized by overcrowded living conditions, limited resources, and significant challenges related to shelter, sanitation, healthcare, and food security. This thesis investigates the living conditions of Rohingya refugees in Kutupalong, focusing on the spatial organization of shelters and the socio-cultural factors shaping their arrangements. Using a mixed-methods approach, the study combines qualitative interviews with Rohingya families and community leaders and quantitative mapping techniques to analyze shelter layouts and their significance. This integrated methodology provides a comprehensive understanding of how the Rohingya adapt to their environment and navigate displacement challenges. The findings reveal that shelter layouts in Kutupalong are deeply influenced by cultural practices, social relationships, and shared values. The spatial organization reflects the community’s traditions, such as extended family structures, communal living, and gender-based privacy norms. These arrangements help maintain a sense of identity, belonging, and mutual support despite harsh conditions. Additionally, the research highlights adaptive strategies employed by families, including modifications like bamboo partitions, tarpaulin sheets, and elevated flooring to enhance privacy, create communal spaces, and protect against environmental challenges such as monsoons and extreme heat. By exploring the interplay between culture and spatial organization, this thesis underscores the importance of integrating cultural contexts into humanitarian responses. It advocates for culturally informed approaches to designing interventions, ensuring they are effective and sensitive to the needs of displaced communities. The insights gained have significant implications for humanitarian agencies and policymakers, emphasizing the need to move beyond standardized solutions and prioritize the unique socio-cultural dynamics of refugees. Ultimately, this research celebrates the resilience and adaptability of the Rohingya community while offering valuable lessons for addressing displacement crises worldwide. It highlights the importance of dignity, hope, and culturally sensitive support in rebuilding the lives of displaced populations.
Study on CSP and It’s Possibility in Bangladesh
(Daffodil International University, 2019-12-06) Jahidul Islam; Reza, Yasin
Solar power (CSP) is an exciting energy generation technology that concentrates solar radiation to produce high temperatures in a solar power plant to generate steam. In this process, no fossil fuel is used; therefore, no greenhouse gas is released. This study explores Bangladesh's average yearly sunlight period and was compared to other developing countries, such as Germany and Spain, prominent for their growth in the field of renewable energy. Suitable locations are recommended for solar plants based on optimum efficiency variables such as sunlight hours, obtained sunshine radiation, form of plane etc. Possible solar technologies such as solar concentration (CSP) have been mentioned with their optimal power, performance, storage installation and unit cost. The analysis is based on the annual direct normal irradiation (DNI) results. Suitable locations are recommended for solar plants based on optimum efficiency variables such as sunlight hours, obtained sunshine radiation, form of the plane etc. Possible solar technologies such as solar concentration (CSP) have been mentioned with their optimal power, performance, storage installation and unit cost. The analysis is based on the annual direct normal irradiation (DNI) results. The area needed for the generation of 100MWe of electricity with an average annual DNI of 2,000kWh/ is about 2k . The average annual DNI in Bangladesh is almost 1900 kWh/ that are enough to run the CSP plant. As fuel costs are absent in CSP, the energy crisis in Bangladesh may be an attractive choice. This paper focuses on the possibility of CSP use in Bangladesh. The area needed for the generation of a 100MWe of electricity with an average annual DNI of 2,000kWh/ is about 2k . The average annual DNI in Bangladesh is almost 1900 kWh/ that are enough to run the CSP plant. As fuel costs are absent in CSP, the energy crisis in Bangladesh may be an attractive choice. This paper focuses on the possibility of CSP use in Bangladesh.
Transmission Gate vs Other Logic Styles
(North South University, 2023-12) Jahidul Islam; Tamima Tabassum; Dr. Nafisa Noor
This research paper analyzed the correlation among 3 members of the logic family, they are TGL, CMOS and PTL. It compares the basic structure, operation, voltage levels, power consumption, application, complexity and scalability between them. We have simulated various MUXes and DEMUXes and examined the data. The results revealed that TGL is great when you need switches that work bidirectionally without messing up the signal. CMOS is like the go-to for digital logic design because it's super balanced in terms of power, speed, and space. PTL is a smaller option for specific logic functions, but it can have some issues with voltage. It all comes down to what we need for our design, considering factors like power, performance, area and complexity.