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류광열(Kwangyeol Ryu),김보현(Bohyun Kim),최헌종(Honzong Choi) 대한산업공학회 2010 산업공학 Vol.23 No.2
Customer needs for final products are very unpredictable because product specifications and technologies are being improved very quickly thereby their requirement level is also elevated correspondingly. In order to survive and to enhance competitiveness in the global market, many manufacturing companies are trying to find a breakthrough from collaborization. Even though they want to collaborate with others, however, they do not exactly know what kind of system they have to develop or which technology they have to use. In this paper, therefore, we first investigate status and trend of information systems and infrastructure that are essential for collaboration. We then clearly describe definition and classification of collaboration with various point of views considering collaboration pattern, timing condition of collaborative activities, organizational structure, etc. With web-based collaboration systems already developed by i-Manufacturing (Korean-style Manufacturing Innovation) project, led by Korean government from 2004, we introduce main functions and analyze collaboration types of each system. Strategically important technologies for supporting collaboration will also be illustrated by reorganizing collaborization technologies after evaluating them with respect to emergency and importance of each technology. We hope this research will provide a guideline on collaboration especially for small and medium sized manufacturing companies.
류광열(Kwang-Yeul Ryu),최진영(Jin-Young Choi) 한국정보과학회 1999 한국정보과학회 학술발표논문집 Vol.26 No.1A
본 논문에서는 Change과 Robert가 발표한 분산환경에서의 리더 선출 알고리즘을 비동기 프로세스 모델링 언어인 PROMELA로 명세하였으며 체커(Model Checker)인 SPIN을 이용하여 선형 시제 논리에 입각한 요구사항을 만족하는지 검증하였다.
류광열(Kwang Youl Ryu),강원식(Won Seek Kang),김영호(Young Ho Kim),장해동(Hae Dong Jang),홍진태(Jin Tae Hong),유환수(Hwan Soo Yoo),윤여표(Yeo Pyo Yun) 대한약학회 1998 약학회지 Vol.42 No.3
Ihe purpose of this study was to determine the antioxidative effects of Rhodiola sachalinensis. Rhodiola methanol extract was fractionated sequentially with dichloromethane and butanol. Each Rhodiola fraction (water, MeOH, BuOH and CH2Cl2 fractions) showed the potent superoxide dismutase (SOD) activity, and had inhibitory effects on peroxide value of linoleic acid (40-57%) and lipid peroxidation (47-70%). In Fe2+/ascorbate system-induced rat liver microsome. Rhodiola methanol extract also recovered carbon tetrachloride-induced decrease in SOD by 42% and catalase activities by 50%, and had inhibitory effects (54%) on carbon tetrachloride-induced lipid peroxidation in rat liver microsome. These results suggest that Rhodiola sachalinensis has the antioxidative effects.