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안병만,김용길,차병묵,피윤섭,윤재홍,김진관 國立 昌原大學校 産業技術硏究所 1994 産技硏論文集 Vol.8 No.-
STD61종 열간금형강의 수명향상을 위하여 ion nitriding처리를 실시하였다. 이온질화전의 모재의 열처리시에는 1030˚C에서 quenching한 후 530˚C에서 2시간 tempering했을 때 Hv=600의 높은 경도값을 나타내었다. 580˚C, 600˚C에서 2시간 tempering했을 때는 각각 Hv=500, Hv=400으로 경도값이 오히려 감소했다. 이온질화 처리시에는 처리시간이 길고 N₂와 Ar첨가유량이 많을 수록 깊은 화합물층과 확산층을 얻었다. 그리고 각 처리조건에서 안정된 Hv=1150의 질화물층을 얻을 수 있다. Ion nitriding treatment has been practiced to improve the life of hot die steel of STD61. Before nitriding the parent STD61 tempered at 530˚C, 2hrs after quenching at 1030˚C, It showed the high hardness distribution of Hv=600. The hardness distribution has decreased by Hv=400, Hv=500 when tempered for 2hrs at 580˚C, 600˚C. In the ion nitriding, the more treat-time and the more N₂and Ar flux, the deeper the compounded layer and the diffused layer. The stable hardness, Hv=1150, of nitride layer was obtained at various treatment condition.
Pi-Yun Chen 한국교육개발원 2014 KEDI Journal of Educational Policy Vol.11 No.1
This study aims to examine the quality of offshore program management based on ISO (International Organization for Standardization) 9004 for universities in Taiwan, the difference between the quality evaluated and the expectation of the interested parties and its impact on their satisfaction level by surveying the students and staff/faculty involved in the offshore programs hosted by TREE University, Taiwan. It is found that respondents have considerably high evaluation of quality management based on ISO 9004 toward its offshore programs. Nevertheless, there are gaps between real quality and expectation found in some constructs for the interested parties including students and staff/faculty and these gaps results in impact on the satisfaction, especially in the ‘process management’ and ‘improvement, innovation and learning’ constructs.
Yun-Yun Zhu,Xue Li,Heng-Yi Yu,Yu-Fang Xiong,Peng Zhang,Hui-Fang Pi,Han-Li Ruan 대한약학회 2015 Archives of Pharmacal Research Vol.38 No.5
Three novel alkaloids (1–3), together withnineteen known ones (4–22), were isolated from the bulbsof Lycoris longituba. Their structures were elucidated onthe basis of extensive spectroscopic analyses, which belongto several Amaryllidaceae alkaloid skeletons. Amongthem, the harmane-type alkaloids (the new compound 1and the known compounds 5, 6 and 7) were found for thefirst time from Lycoris genus. The isolates were tested fortheir neuroprotective activities against CoCl2, H2O2 andAb25–35-induced SH-SY5Y cell injuries, and the majorityof them exhibited neuroprotective activities of differentdegrees. The acetylcholinesterase (AChE) inhibitoryactivities of the isolated alkaloids were also evaluated,while compounds 12, 14–20 and 22 exhibited extremelysignificant AChE inhibitory activities.
피윤섭,Pi, Yun-Seop 한국파렛트컨테이너협회 2005 파렛트 뉴스 Vol.39 No.-
본 원고는 지난 10/13~14 서울에서 개최된 제4차 한ㆍ중ㆍ일 비즈니스포럼에서 필자가 발표한 원고를 입수 게재합니다. -편집자 주-