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이성우,Lee, Seong-U 한국건강관리협회 1988 건강소식 Vol.12 No.9
지난 8월 25일 개최된 건협 언론인 초청 간담회에서 이성우 보건국장은 '일차보건의료와 예방시책'이라는 주제를 가지고 우리나라 국민 건강 관리 시스템의 예방시책 방안을 얘기했다. 이 글은 이국장의 발표문을 게재한 것이다.
이성우,구윤서,김동식,신영길 대한금속재료학회(대한금속학회) 1986 대한금속·재료학회지 Vol.24 No.7
Understanding of the flow pattern of a molten steel through tundish is an essential precondition for estimating and avoiding negative effects on steel cleanliness. To study removal of inclusion in the tundish, experiments were carried out using a one third scale water model of the tundish with a dam and a weir. The flow patterns were determined by a flow visualization technique and by a theoretical analysis of the tundish system. The velocity field was predicted by solving the turbulent Navier-Stokes equations using the K-ε model for turbulent viscosity. There was a good agreement between the experimental results and the predictions. A plant test revealed significant improvements on slab quality such as reduction of surface defects of the cold-rolled sheets.
답압시간과 비료종류가 골프코스 그린 잔디의 품질에 미치는 영향
이성우,이재필,김두환 한국잔디학회 2008 Weed & Turfgrass Science Vol.22 No.1
Traffic management is becoming an important issue in turfgrass practise on golf course. The objective of this study was to investigate the combined impact of different traffic times and types of fertilization. Traffic treatment was applied in morning (AM), noon, and afternoon (PM). Fertilizers used include faster-release fertilizer (21-17-17) and slow-release fertilizers (12-6-18, 11-3-22, 20-3-20, 10-3-10). Experiment was conducted from Oct. 1 to Nov. 30, 2005 on a nursery putting green of Incheon Grand Golf Club. The growth and quality of creeping bentgrass (Agrostis palustris cv. 'SeasideⅡ') were evaluated on visual leaf color, leaf texture, shoot density, and root length. The measurement at 20 days after treatment, turfgrass color and leaf texture showed the best result on 10-15-10 + Noon-traffic plot. Turf quality and traffic tolerance were not different at Am and Pm traffic treatment. However, traffic stress in early morning and late evening caused the most severe damage to the turfgrass. Shoot density was the highest in 10-15-10 + Noon-traffic treatment but root length was not different among treatments after 30 day measurement. Among the fertilizers, slow release fertilizer resulted in higher turf quality and traffic tolerance than fast release fertilizer, however, shoot density did not showed a significantly different. For the fast recuperation of turfgrass from traffic injury in the early winter, it is recommended to avoid early morning and late evening traffic such as cup replacement and other maintenance practise. It is also recommended to delay the first tee-up time and ending early for last tee time during cold weather season.