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Ghang, Bong-Jun;Lee, Woo-Jin
- The Journal of Korean Institute for Practical Engineering Education
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- v.4 no.1
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- pp.13-21
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- 2012
The purpose of this study is to research factors determining satisfaction on the short-term training courses offered to vocational school teachers, and to analyze the case of the overseas training for developing countries. An empirical study is performed by surveying 226 trainees having participated in international HRD program of the HRD Korea during 2008~2011. The results show that the training demand survey, training period and fitting to the trainees' major and the educational level positively affect the satisfaction on the short-term training for teachers of vocational schools. The implication of this study is that programs customized to personal attributes and educational level are needed in the ODA overseas training and the short-term training for teachers of vocational schools.
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Yu, Da-Yeon;Lee, Byoung-Hwa;Song, Ju-Hun;Lee, Si-Hyun;Jeon, Chung-Hwan
- Transactions of the Korean Society of Mechanical Engineers B
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- v.35 no.10
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- pp.997-1003
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- 2011
In order to investigate devolatilization characteristics for ashless coal with relatively low ash content and high heating value, an experiment was performed in different bed configurations of TGA and DTF(Drop Tube Furnace) at atmospheric pressure condition. The heating rate was $10^{\circ}C$/min up to $950^{\circ}C$ in TGA, while the temperatures of DTF varied from 500 to $1300^{\circ}C$ in step of $200^{\circ}C$. A weight loss and particle temperature were obtained to determine devolatilization kinetics. The kinetic parameters including an activation energy and pre-exponential factor for ashless coal were obtained using Coats-Redfern method in TGA and single step method in DTF. Furthermore, the devolatilization kinetics of the ashless coal were compared with the results of different kinds of conventional coal such as sub-bituminous and bituminous. The results show that the activation energy of devolatilazation for ashless coal is lower than those of others in fixed and entrained conditions.
https://doi.org/10.3795/KSME-B.2011.35.10.997 인용 PDF KSCI