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이해종(Hae Jong Lee),김세현(Se Hyun Kim),이중섭(Chung Seub Yi),이상철(Sang Chul Lee),정효민(Hyo Min Jeong),정한식(Han Shik Chung) 대한기계학회 2004 대한기계학회 춘추학술대회 Vol.2004 No.11
The present study is an investigation on the characteristics of heavy load toque converter by experimental process. To get the dynamic performance, the dynamometer was used with a parameters of speed, torque, oil pressure and oil flux, etc. The torque converter was tested for various input speed, output oil pressure and input oil flow rate. All experiments were investigated in case that the speed ratio is increased. The torque ratio and capacity factor was in inverse proportion to speed. Engine revolution had a more effects at region of low speed ratio. But, the opposite phenomena were represented increase of efficiency. In result of this experiments, the characteristics of torque converter were not influenced by oil pressure and oil flux.
이해종(Hae-jong Lee),최석천(Seuk-cheun Choi),이중섭(Chung-seub Yi),정한식(Han-shik Chung),정효민(Hyo-min Jeong) 한국자동차공학회 2003 한국자동차공학회 지부 학술대회 논문집 Vol.2003 No.10
The present study is focused on the characteristics of heavy duty torque converter for tracked vehicle. A dynamometer was used to get the characteristics of a torque converters. In order to ensure a reliability, the present experimental datas were compared with other experiments. The torque converter was tested for various input speed. All experiments were investigated in case that the speed ratio is increased. The torque ratio and capacity factor was in inverse proportion to speed ratio. Engine revolutions had a more effects at region of low speed ratio. But, the opposite increase of efficiency.<br/>
정지윤 ( Jeong Ji Yun ),정재연 ( Jeong Jae Yeon ),최화영 ( Choi Hwa Young ),이해종 ( Lee Hae Jong ) 한국보건사회연구원 2021 保健社會硏究 Vol.41 No.1
이 연구의 목적은 도시와 농촌에 의한 재난적의료비 발생의 규모를 파악하고, 이에 영향을 줄 수 있는 요인을 비교·확인하는 것이다. 연구에서는 한국보건사회연구원이 제공한 제14차(2019년) 한국복지패널 자료를 활용하였다. 종속변수는 재난적의료비 발생 유무이고, 10, 20, 30 및 40% 역치수준별로 나누어 살펴보았다. 독립변수는 가구주의 특성과 가구특성으로 구분하였다. 가구주·가구 특성이 도시·농촌 간 차이가 있는지와 역치기준별로 도농간 재난적의료비 지출빈도 차이가 있는지 살펴보기 위해 X<sup>2</sup>-text를 실시하였다. 또한, 재난적의료비 발생에 영향을 미치는 요인을 분석하기 위해 로지스틱 회귀분석을 실시하였다. 분석결과 가구주의 특성과 도시·농촌 가구의 특성은 다르게 나타났고, 모든 역치수준에서 도시보다 시골가구에서 재난적의료비 지출이 더 많았다. 도시 가구에 비해 농촌 가계의 재난적의료비의 발생 확률이 높았고, 40%역치수준에서 상당한 차이가 있었다. 재난적의료비 발생에 영향을 미치는 요인은 ‘배우자 유무, 경제활동 유무, 주관적 건강상태, 의료보장형태, 가구원수, 가구원 장애유무’변수들 이었다. 따라서 재난적의료비의 발생을 막기 위해서는 정의 설정과 정책 마련에 대한 논의가 필요하다. The purpose of this study is to identify the scale of catastrophic health expenditure by urban and rural areas, and to compare and identify factors that may affect them. In this study, the 14th (2019) Korea Welfare Panel data, provided by the Korea Institute for Health and Social Affairs, was used. The dependent variable was occurrence of catastrophic health expenditure, divided into 10, 20, 30, and 40% threshold levels. The independent variables were divided into household head's characteristics and household characteristics. Logistic regression analysis was performed to analyze the factors affecting the occurrence of catastrophic health expenditure at each threshold level. The characteristics of household heads and the characteristics of households were of urban and rural households were different. At all threshold levels, there were more rural households with catastrophic health expenditure than urban. Compared to urban households, there was a higher probability of catastrophic health expenditure in rural households and had a significant effect at the 40% threshold level. Factors influencing the occurrence of catastrophic health expenditure were different in urban and rural areas, especially at the 40% threshold level. In order to prevent the occurrence of catastrophic health expenditure, discussions on the definition settings and policy preparation are needed.
채영문,이해종,박창래,정지선,Chae, Young-Moon,Lee, Hae-Jong,Park, Chang-Rae,Jeong, Jee-Sun 대한예방의학회 1990 Journal of Preventive Medicine and Public Health Vol.23 No.1
Hospitals are experiencing an increasing amount of financial difficulty due to government control of hospital rates since national health insurance has been implemented. The decision support system (DSS) was developed to provide cost and revenue information for the services rendered by each department in an effort to reduce costs. This information may be used to identify the causes of financial loss if cost exceeds revenue and to conduct variance analysis or portfolio analysis to improve financial situation of hospitals. The DSS was developed using a micro-mainframe interface approach where the mainframe computer collects and summarizes daily cost and revenue data and the micro computer computes the cost for each department. The significances of this paper are to determine the cost allocation basis and methods which are suitable to Korean situation and to apply DSS technology to the cost analysis.
최석천(Seuk Cheun Choi),이해종(Hae Jeong Lee),신유식(You Sik Shin),정한식(Han Shik Chung),정효민(Hyo Min Jeong),이광영(Kwang Young Lee) 대한기계학회 2004 대한기계학회 춘추학술대회 Vol.2004 No.11
In this study, a experimental method has been introduced for the various exhaust pipe geometry of 4-stroke single cylinder engine. The main experimental parameters are the variation of exhaust pipe diameters and lengths, to measuring the pulsating flow when the intake and exhaust valves are working. As the results of experimental test, the various exhaust geometry were influenced strongly on the exhaust pressure. As the exhaust pipe diameter was decreased, the amplitude and the number of compression wave in exhaust pressure was increased. According to decreasing pipe diameter, the number of compression wave in exhaust pressure was decreased. When the pipe diameter was increase, the second amplitude was increased.