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김영선(Y. S. Kim),이중혁(J. H. Lee),김석현(S. H. Kim) 대한기계학회 2016 대한기계학회 춘추학술대회 Vol.2016 No.12
Resonant type mixer is widely used to mix materials effectively by utilizing the resonance effect. In this study, vibration acceleration of 100g is required for the work and transmitted force to the support should be minimized to operate comfortably. In addition, vibration of the motor part should be small compared with other parts for the durability of the mixer. In this study, 3 degree of freedom vibratory system is applied to obtain the vibration performance. Mixer consists of three parts; payload body, rotating part and balancing weight. Two motors spin two disks with eccentric masses in opposite direction and only vertical vibration is available. Vertically transmitted forces to the support are cancelled out by the motions of the payload body and balancing weight in opposite direction. To achieve the aim, we investigate the resonance effect of the 3<SUP>rd</SUP> vibration mode of the system. We propose that this aim can be achieved by resonating the 3<SUP>rd</SUP> mode, if we properly design the masses and springs of the three degree of freedom system.
철도시스템의 시스템엔지니어링 관점에서 종합시운전에 대한 고찰
김병도(Kim B.D.),강병모(KANG B.M.),김영선(Kim Y.S.),안효권(Ahn H.K.),김종선(Kim J.S.) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.11월
The HEMU-400X(High-speed Electric Multiple Unit) project, which was started in 2007, have achieved a goal of first stage successefully, and then entered into second stage to finalize a design and manufacture the real train. It is very important to verify the performance of the developed train because of the first high speed electric multiple unit train in korea. And also it is important to verify how the developed train has a performance with existing facilities. The each sub-system of a railway, such as rail, rolling stock, catenary, etc, have to harmonize with each other to secure a optimized performance and safety. In this paper, the authors indicates a methodology to verify a safety of the railway facilities and developed train effectively by reviewing a requirements of the systems engineering to secure railway safety, the case study of KTX for the full system commissioning and the test items required by the law.
이경용 ( K Y Rhee ),김영선 ( Y S Kim ),김기식 ( K S Kim ),박종식 ( J S Park ),서동욱 ( D U Seo ),김혜민 ( H M Kim ) 한국안전학회(구 한국산업안전학회) 2014 한국안전학회지 Vol.29 No.6
The statistics of occupational injuries and illnesses is one of the most important indicators of worker``s safety and health in the field of occupational safety and health. The conventional statistics was produced without consideration of gender difference. This study was planned to investigate the difference of occupational injuries and illnesses by gender because that recently female workers was increased through the change of industrial structure such as from manufacturing dominated to service dominated structure. Statistics of occupational injuries and illnesses collected by workmen``s compensation insurance system that have no information about gender composition of population. Economically active population survey was used to calculated the rate of occupational injuries and illnesses by gender. The distribution of estimated rate of occupational injuries and illnesses by industry, occupation and the type of accident were different between male and female employees, but those by the size of enterprise, age of the injured, the duration of the first recuperation, and job tenure were similar between male and female employees. This study has shown that gender sensitive approach may be applied to policy of occupational safety and health because that gender neutral perspective may not discover the fact of gender specific problems.
해외저술 소개 : 임상 연구: 치료 ; 횡격막과 닿아 있는 간종양의 경피적 고주파열 치료: 인공 복수의 열감소 효과(heat-sink effect)의 임상적 평가(초)
남상유 ( S. Y. Nam ),임현철 ( H. Rhim ),강태욱 ( T. W. Kang ),이민우 ( M. W. Lee ),김영선 ( Y. S. Kim ),최동일 ( D. Choi ),이원재 ( W. J. Lee ),박율리 ( Y. Park ),장일수 ( I. Chang ),임효근 ( H. K. Lim ) 대한간암연구회 2010 대한간암학회지 Vol.10 No.-