293 research outputs found
The evaluation of quality of transformer oil by measuring capacitance
No full textThis thesis report is submitted in partial fulfillment of the requirements for the degree of Bachelor of Science in Electrical and Electronic Engineering, 2011.Cataloged from PDF version of thesis report.Includes bibliographical references (page 25).Transformer oil plays an important role to keep transformer active and operate efficiently. It keeps transformer cool and works as an insulator between transformer windings and body. Due to arcing, corona discharge, low-energy sparking, severe overloading, pump motor failure and overheating in the insulating system are some of the possible mechanisms of degradation of transformer oil. This problems can increase water content, decrease dielectric strength, increase acidity or neutralization number(NN), increase or decrease interfacial tension (IFT) out of a specific range(40 to 50 dyne/cm), decrease quality index system (QQIN), and rapid increase in the amount of combustible gases, which can decrease the transformer life time and quality of service to consumer. There are several methods to identify and solve this problem. If this problem go in severe condition, it is not possible to solve without replacing by new one. May be there are different methods to check this problem but no specific method to check without taking oil outside the transformer. These methods are very expensive and time consuming. That’s why; our objective is to identify this problems as well as transformer condition without taking the oil outside by measuring the capacitance of the transformer.Mukul AhmedMd. Enamul Haque RakibB. Electrical and Electronic Engineerin
The Challenges of Climate Change and Community Resilience
No full textA.K. Enamul Haque, Pranab Mukhopadhyay, Mani Nepal, and Md Rumi Shammin, (Editors). 2022. Climate Change and Community Resilience: Insights from South Asia. Singapore: Springer Nature. This timely and important edited volume is dedicated to Professor Karal-Goran Maler (1939–2020), who, along with Professor Sir Partha Dasgupta of Cambridge University, founded the South Asian Network for Development and Environmental Economics (SANDEE)
A Technology and Management Perspective on Performance in Private and State-owned Banks – Bangladesh Cases
No full textAbstract Title: Comparative Study Between Private and State-owned Banks: Technology and Management Perspectives Author: Khan, Enamul Haque Supervisor: Catherine Lions Background: Bangladesh is a lower developing country with limited resources and income. In Bangladesh, both private and state-owned banks operate side by side but under dissimilar conditions. State-owned banks are obviously overstaffed but secured by the government guarantee while private banks need to be competitive and profitable to survive. Two major competitive factors are technology innovation and good governance system. Private banks in Bangladesh are providing complete online solutions and function with a decentralized management while state-owned banks behave opposite due to government’s traditional attitude. Therefore it is relevant to explore what the state-owned bank can learn from the private bank so that the former can be more effective and profitable like private banks. Purpose: The purpose is to explore what the state-owned bank can learn from its private competitor. My first purpose is to analyze the functioning of technological improvements that, due to generation change, are vital for banks in developing countries. Secondly, since good governance is necessary for the organization to be efficient, I want to identify the main differences between state-owned and private banks that influence the performance. Finally, how to adapt these issues by state-owned banks to improve the performance is other purpose of this study. Method: Unstructured interviews with qualitative approach were carried by interviewing a private bank and a state-owned bank expertise. Primary data collected through telephone interviews helps to identify the practice in the different ownership systems and how growth factors work. Secondary data works as accelerator of the primary data. Conclusion: I have found that state-owned banks have three major problems are: Poor IT infrastructure, clumsy managerial governance working on regulatory bindings and political influence. To overcome these problems, state-owned banks should try to move towards decentralization of managerial activities and meet the technology standard requirements. Key words: Information Technology (IT), Private Bank, State-owned Bank, Developing Countries, Management, Ownership, Government, Regulation, Politics, Interview, Primary and Secondary Data
Climate Change and Community Resilience
No full textThis open access book documents myriads of ways community-based climate change adaptation and resilience programs are being implemented in South Asian countries. The narrative style of writing in this volume makes it accessible to a diverse audience from academics and researchers to practitioners in various governmental, non-governmental and international agencies. At a time when climate change presents humanity with a gloomy future, the stories of innovation, creativity, grassroots engagement and locally applicable solutions highlighted in this book provides insights into hopeful ways of approaching climate solutions. South Asian countries have been dealing with the impact of climate change for decades and thus offer valuable learning opportunities for developing countries within and beyond the region as well as many western countries that are confronting the wrath of climate induced natural disasters more recently. SANDEE has been a pioneer in the development of research and training in environmental economics and related issues in South Asia and Prof Maler has been throughout SANDEE's history, its mentor, and its strongest supporter. Many young economists in South Asia have significantly benefited from Prof Maler's guidance and inputs. The present volume on “Climate Change and Community Resilience: Insights from South Asia” is a fitting tribute and an excellent reflection of Prof Maler's contributions to the SANDEE programme throughout his association. - Mahesh Banskota, Ph.D. Professor, Development Studies School of Arts, Kathmandu University This comprehensive volume aptly identifies grassroots initiatives as the core of the problem of adaptation to climate change. The analysis of the different experiments is lucid, inclusive, and full of interesting detail. The methodologies used and the subjects covered span a range of frameworks and narratives. Put together, the studies are a fitting tribute to Karl-Goran Maler, who spent years putting his impeccable expertise to use for the cause of enhancing research in South Asia. - Kanchan Chopra, Ph.D. Former Director and Professor, Institute of Economic Growth, Delhi, and Fellow, SANDEE The slow international policy response to climate change elevates the importance of understanding how communities can respond to climate change’s many threats. This unusually accessible volume provides that understanding for South Asia while being relevant to the rest of the world. Its emphasis on research by scholars from the region makes it a wonderful tribute to Prof. Karl-Göran Mäler, who contributed so much to the growth of environmental economics research capacity in South Asia. - Jeffrey R. Vincent, Ph.D. Clarence F. Korstian Professor of Forest Economics & Management Nicholas School of the Environment, Duke University, US
A free-space alignment technique for active optical waveguide components
No full textIn this paper an easy to use free-space alignment technique for the alignment of different active optical waveguide components is reported. This technique has successfully been implemented for the characterization of waveguide photodetectors with an intrinsic layer thickness of 0.15 m. This technique is found to be very reliable and accurate.The work reported in this letter was carried out at Sir Syed University of Engineering & Technology (SSUET), Karachi, Pakistan. The author would like to acknowledge the support and contribution of Prof. Dr. Syed Enamul Haque, Dean Faculty of Engineering at SSUET
A free-space alignment technique for active optical waveguide components
No full textIn this paper an easy to use free-space alignment technique for the alignment of different active optical waveguide components is reported. This technique has successfully been implemented for the characterization of waveguide photodetectors with an intrinsic layer thickness of 0.15 m. This technique is found to be very reliable and accurate.The work reported in this letter was carried out at Sir Syed University of Engineering & Technology (SSUET), Karachi, Pakistan. The author would like to acknowledge the support and contribution of Prof. Dr. Syed Enamul Haque, Dean Faculty of Engineering at SSUET
A free-space alignment technique for active optical waveguide components
No full textIn this paper an easy to use free-space alignment technique for the alignment of different active optical waveguide components is reported. This technique has successfully been implemented for the characterization of waveguide photodetectors with an intrinsic layer thickness of 0.15 m. This technique is found to be very reliable and accurate.The work reported in this letter was carried out at Sir Syed University of Engineering & Technology (SSUET), Karachi, Pakistan. The author would like to acknowledge the support and contribution of Prof. Dr. Syed Enamul Haque, Dean Faculty of Engineering at SSUET
Evaluation of Soybean Response to Sulfur Fertilizer Rates and Sources
No full textSulfur (S) deficiency has become a significant concern for producers due to over 90% reduction in atmospheric-S deposition since the “Clean Air Act” was established. Soil organic matter, another key source of S, is steadily declining due to continuous tillage. So, we evaluated soybean [Glycine max (L.) Merr.] yield and leaf-S concentration responses to six fertilizer-S rates (0, 11, 22, 34, 45, and 67 kg S ha⁻¹) across 50 site-years, and six fertilizer-S sources (no-S check, Ammonium Sulfate (AMS), Sul4r-Plus/Gypsum, K-Mag, Tiger90CR, and Poly4) across 9 site-years in Louisiana from 2023-2024. In S rate study, soybean yield responded positively to fertilizer-S at 11 out of 50 sites. Mehlich-3 soil-test S (STS) concentration at 0-15 cm depth correlated better with relative soybean yield, explaining 46% of the yield variability, compared to 41% at 0-30 cm depth. Critical STS concentrations were 9-11 mg kg⁻¹ at 0-15 cm and 7-9 mg kg⁻¹ at 0-30 cm depths, with 86% and 100% accuracy, respectively, in identifying S-deficient sites. Critical STS at 0-30 cm depth resulted in more errors (8%) in predicting S-sufficient sites than 0-15 cm depth (6%). Leaflet-S concentration at full-flowering (R2-3) stage explained 38% of the relative yield variation, with a critical concentration of 2.65-3.00 g kg⁻¹. Sites having concentration below this range also has STS concentrations either below or within the critical level at 0-15 cm depth. In S source study, positive yield responses were measured at 2 out of 9 sites. At both responsive sites, Tiger90CR consistently increased yields compared to no-S check when applied before planting only. Gypsum and K-Mag also consistently increased yields when applied at full-flowering (R2-3) stage, with the potential for similar results if applied at or before planting. Overall, positive yield responses were observed in both fertilizer-S rate and source studies when STS and leaflet-S concentrations were below or near the critical ranges. Based on our data, a 22 kg S ha-1 is recommended when STS concentrations are below or near the critical limit at the 0-15 cm depth. Limited site responses made it difficult to recommend a specific fertilizer-S source, and further research is warranted
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