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2019년 삼척지역 산사태 특성 및 산림의 방재기능에 대한 연구
장수진(Jang, Su-Jin),이윤태(Lee, Youn-Tae),이광연(Lee, Kwang-Youn),김경남(Kim, Kyoung-Nam),이진호(Lee, Jin-Ho),전근우(Chun, Kun-Woo) 한국방재학회 2020 한국방재학회논문집 Vol.20 No.2
Close on the heels of the East Coast Forest Fires (ECFF) in April 2000, Samcheok in the region witnessed landslides in October 2019. Therefore, it is imperative to understand the association between forest fire and slope stability. Accordingly, survey plots were set up around the site of the landslide to investigate micro-topography, forest structure, and growth environment. The results revealed that B plots scored high on appearance and the density of trees, while A plots had high values on the H/D ratio. Further, it is important to control tree density in the restored forests because the H/D ratio, which induces slope stability, exceeds suitable values at both A and B plots, resulting in intense competition among the trees growing in the affected sites. The findings are useful for proposing a mountain management project to prevent sediment-related disasters. Moreover, they would aid in evaluating the root cohesion of trees contributing to slope stability on the east coast region of Gangwon-do, which is prone to disasters such as large-scale forest fires, heavy rains, and landslides. 2000년 동해안 산불피해 이후, 삼척지역에서는 2019년에 산사태가 발생하면서 산불이 사면안정에 미치는 영향에 대하여 파악하는 것이 중요하게 되었다. 이를 위해 토사 발생원에 조사구를 설정하여 산지미지형 특성, 산림구조 및 생육환경과의 관계를 조사하였다. 그 결과, 목본식생의 출현 종수와 개체밀도는 B plots가, 형상비는 A plots가 높게 나타났다. 특히, 붕괴가 발생한 A, B plots에서는 수목 간 경쟁으로 인해 산림의 방재기능이 효과적으로 발휘되는 형상비를 초과하였으므로, 산불 후 회복된 산림에서는 밀도관리가 중요할 것으로 판단되었다. 즉, 이 연구결과는 대형산불, 집중호우, 산사태 등의 재해에 직면해 있는 강원 동해안 지역의 사면안정에 기여하는 수목의 뿌리점착력을 평가함으로써 토사재해방지를 위한 산지관리 사업을 제안하는 데 활용할 수 있을 것으로 기대된다.
파워 스티어링용 베인 펌프 유량 제어부 설계에 관한 연구
이윤태,김진한,김수태 韓國工作機械學會 2000 한국생산제조학회지 Vol.9 No.5
The numerical analysis and the experiments are carried out to develop the design program for the flow control valve attached to the vane pump for power steering. The factors affecting the flow rate characteristics are analyzed by the experi-ments and the numerical analysis. The results are summarized as follows; (1) the main factors affecting to the first and second control flow rate are the diameter of big and small rod of the spool. (2) the cut off is mainly affected by the main spring constant, the initial displacement of main spring and the small diameter of the spool. (3) the dropping slope charac- teristics are decided by the chamfer of spool and the dynamic characteristics of the spool.
진료과별 재무성과 측정모형 구축 연구 : 병원의 의료이익에 영향을 미치는 요소를 중심으로 Factors Influencing Operating Profit of Hospitals
이윤태,유기현 한국병원경영학회 1999 병원경영학회지 Vol.4 No.2
This study was conducted to establish finance performance evaluation model for physicians in each clinical department, by using factors which determines financial outcome (performance) in each clinical department. The ultimate aim of study is to develop effective performance-based pay system for physicians. The system, by motivating physicians, should increase their productivity. To do so, it is critical to establish finance performance evaluation model to achieve final goal of this study. 232 private hospitals were chosen from 693 hospitals which were subject to hospital survey by the Korea Institute of Health Services Management and their revenue and expense-related data during 1997 were collected. By adopting multiple regression method, the study shows that the evaluation model for each clinical department was statistically significant. The study suggest the effective performance-based pay system based on financial performance of each clinical department. The pay system includes the level of compensation, the way of how to allocate profits to each department, and criteria whether the compensation should provide or not. In conclusion, the study has following implications. First, the study suggest finance performance evaluation model for each clinical department. Second, the study suggest guidelines and plans to establish qualitative measure of financial performance in each clinical department. Third, the study suggest that adopting performance-based pay for physicians could be impetus to achieve organizational goal by motivating them with fair compensation.