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정소윤,ISLAMSAIFUL,AGBEMENUJOHN NUNYA,배득종 연세대학교(미래캠퍼스) 빈곤문제국제개발연구원 2015 地域發展硏究 Vol.24 No.1
Korea International Cooperation Agency - Yonsei scholarship program (KYSP) was introduced in 2011 with the main objective of creating leaders for community that can bring change in developing countries. This paper is to evaluate KYSP mainly by employing Analytic Hierarchy Process (AHP) method. Relative weights on multiple criteria applied to KYSP reveal both strengths and weaknesses of the program. KYSP is achieving its aim of grooming leaders since a majority of the respondents were satisfied with most of the measured indicators, especially for trainers’ competence and excellent educational environment. Nonetheless, it still needs improvement in terms of course content and program objectives. The most important finding of this study suggests that KYSP should focus on capacity building in the context of developing countries with which the course contents should be congruent. Along with such pedagogical improvement, more detailed concern for pupils in foreign situations would be an important hygiene factor for the further success of KYSP.
Islam, Saiful,Alfaruqi, Muhammad Hilmy,Song, Jinju,Kim, Sungjin,Pham, Duong Tung,Jo, Jeonggeun,Kim, Seokhun,Mathew, Vinod,Baboo, Joseph Paul,Xiu, Zhiliang,Kim, Jaekook Elsevier Inc 2017 Journal of Energy Chemistry Vol.26 No.4
<P>In this study, we report the cost-effective and simple synthesis of carbon-coated alpha-MnO2 nanoparticles (alpha-MnO2@C) for use as cathodes of aqueous zinc-ion batteries (ZIBs) for the first time. alpha-MnO2@C was prepared via a gel formation, using maleic acid (C4H4O4) as the carbon source, followed by annealing at low temperature of 270 degrees C. A uniform carbon network among the alpha-MnO2 nanoparticles was observed by transmission electron microscopy. When tested in a zinc cell, the alpha-MnO2@C exhibited a high initial discharge capacity of 272 mAh/g under 66 mA/g current density compared to 213 mAh/g, at the same current density, displayed by the pristine sample. Further, alpha-MnO2@C demonstrated superior cycleability compared to the pristine samples. This study may pave the way for the utilizing carbon-coated MnO2 electrodes for aqueous ZIB applications and thereby contribute to realizing high performance eco-friendly batteries. (C) 2017 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved.</P>
Grid Independent Photovoltaic Fuel-Cell Hybrid System: Design and Control Strategy
Islam Saiful,Belmans Ronnie The Korean Institute of Electrical Engineers 2005 KIEE International Transactions on Electrical Mach Vol.b5 No.4
In this paper, a hybrid photovoltaic fuel-cell generation system employing an electrolyzer for hydrogen generation and battery for storage purpose is designed and simulated. The system is applicable for remote areas or isolated DC loads. Control strategy has been considered to achieve permanent power supply to the load via the photovoltaic/battery or the fuel cell based on the power available from the sun. MATLAB and SIMULINK have been used for the simulation work. A sensitivity analysis is conducted for various load level based on availability of solar radiation.
Islam, Saiful,Alfaruqi, Muhammad Hilmy,Putro, Dimas Yunianto,Mathew, Vinod,Kim, Sungjin,Jo, Jeonggeun,Kim, Seokhun,Sun, Yang-Kook,Kim, Kwangho,Kim, Jaekook Wiley (John WileySons) 2018 ChemSusChem Vol.11 No.13
<P>Rechargeable hybrid aqueous batteries (ReHABs) have emerged as promising sustainable energy-storage devices because all components are environmentally benign and abundant. In this study, a carbon-wrapped sponge-like Na3V2(PO4)(3) nanoparticle (NVP@C) cathode is prepared by a simple pyrosynthesis for use in the ReHAB system with impressive rate capability and high cyclability. A high-resolution X-ray diffraction study confirmed the formation of pure Na ion superionic conductor (NASICON) NVP with rhombohedral structure. When tested in the ReHAB system, the NVP@C demonstrated high rate capability (66mAhg(-1) at 32C) and remarkable cyclability over 1000 cycles (about 72% of the initial capacity is retained at 30C). Structural transformation and oxidation change studies of the electrode evaluated by using insitu synchrotron X-ray diffraction and exsitu X-ray photoelectron spectroscopy, respectively, confirmed the high reversibility of the NVP@C electrode in the ReHAB system through a two-phase reaction. The combined strategy of nanosizing and carbon-wrapping in the NVP particles is responsible for the remarkable electrochemical properties. The pyrosynthesis technique appears to be a promising and feasible approach to prepare a high-performance electrode for safe and low-cost ReHAB systems as nextgeneration large-scale energy storage devices.</P>