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제주산(濟州産) 돼지의 내부기생충(內部寄生蟲)에 관(關)한 조사(調査)
김철수,김수후,이방준,장두환,Kim, S.H.,Kim, C.S.,Lee, B.J.,Jang, D.H. 대한수의학회 1969 大韓獸醫學會誌 Vol.9 No.2
In a survey of the internal parasites of 1000 swine at Quelpart Island (Cheju-do), Incidence of the parasites was 99.6 percent and negative result was 0.4 percent only. The results was obtained as follows; Metastrongylus apri-51.6% Ascarops strongylina-23.5% Hyostrongylus rubidus -4.1% Trichuris suis -34.8% Ascaris lumbricoides-64.3% Cesophagostomum spp. -74.9% Strongyloides ransomi-8.1% Cysticercus cellulosae -3.8% Cysticercus tenuicollis -17.1% Echinococcus -11.8% Coccidia -61.5% Balantidium coli -23.4%.
저상 고상 승강장 겸용 승강문 스텝 성능조건에 관한 연구
김철수(C. S. Kim),안승호(S. H. Ahn),정광우(K. W. Chung ),김재문(J.M. Kim),이승일(S.I. Lee),최덕호(D. H Choi),박민흥(M. H. Park) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.10
Heights of a platform above the rail for the passenger train in the country are classified into two categories such as the low level (500mm; mainline) and the high level (1,135mm; metropolitan subway line) platforms. In order to operate similarly both a mainline railroad and a metropolitan subway line as the requisite door safety system it is necessary to develop the doorstep equipment of the rolling stock regardless of both the low and high level platforms. In this study performance requirements of doorstep equipments used for two types of platforms are examined on the supposition that the train only for the low level platform could stop in the both low and high level platforms.
김철수(C. S. Kim),안승호(S. H. Ahn),허원(C. S. Woo),정광우(K.W. Chung) 한국철도학회 2013 한국철도학회 학술발표대회논문집 Vol.2013 No.11
갱웨이 벨로우즈는 관절형 고속철도차량 곡선주행시 객차 끝단부 사이에 다양한 변위차를 고려하여 갱웨이 프레임에 장착된 이중 주름구조 네오프렌 고무부품이다. 본 연구에서는 고속철도차량 갱웨이 프레임의 안전성 연구일환으로서, 3축 회전변위(롤링, 요잉, 피칭 변위차)조건 및 혼합모드(롤링+요잉)조건하의 갱웨이 벨로우즈의 구조해석 결과로부터, 리그 시험(피로시험)의 가속 조건을 제안하고자 한다. The fatigue failure of the bellows of the articulated type high speed train (HST) has a harmful effect on the riding comfort for the passengers with the increase of noise and ringing in the ears due to airtightness failure during pass through a long tunnel. In this study, to assure the safety of gangway bellows of the HST, non-linear analysis of the gangway bellows considering triaxial angular displacement(rolling /yawing/pitching) between the carriage end parts are performed. Moreover, from the results of non-linear analysis, the accelerated condition of the rig test is proposed.
김철수(C.S. Kim),안승호(S.H. Ahn),박민흥(M.H. Park),정광우(K.W. Chung) 한국철도학회 2012 한국철도학회 학술발표대회논문집 Vol.2012 No.5
국내 여객열차 전용 승강장은 높이에 따라 두가지 종류로서, 일반 간선열차에서 주로 사용하는 저상승강장과 수도권 전동차에서 주로 사용하는 고상승강장으로 구분된다. 중·고속 열차가 수도권 전철구간과 본선구간에서 혼용할 경우에 안전운전 및 승객편의를 함께 고려하기 위해서는 저상/고상 승강장에 상관없이 승하차할 수 있는 승강문 스텝장치가 필요하다. 본 연구에서는 전철역사 및 일반 철도역사에서 모두 승하차가 가능한 저상/고상 승강장 겸용 승강문 스텝 개념설계(안)의 강도해석을 수행하고 이의 안전성을 검토하였다. Heights of a platform above the rail for the passenger train in the country are classified into two categories such as the low level (500mm; mainline) and the high level (1,135mm; metropolitan subway line) platforms. In order to operate similarly both a mainline railroad and a metropolitan subway line, as the requisite door safety system, it is necessary to develop the doorstep equipment of the rolling stock regardless of both the low and high level platforms. In this study, Structural analysis of doorstep equipments used for two types of platforms are performed on the supposition that the train only for the low level platform could stop in the both low and high level platforms.
가솔린 엔진의 밸브타이밍 변화가 부분부하 조건에서 잔류가스량 및 연소특성에 미치는 영향
김철수(C.S.Kim),송해박(H.B.Song),이종화(J.H.Lee),유재석(J.S.Yoo),조한승(H.S.CHo),안동원(D.Y.Ahn) 한국자동차공학회 1998 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1998 No.11_1
In-cylinder flow and mixture formation are key contributor to both idle stability and co mbustion stability at part load of automotive engine. The real time measurements of air-f uel ratio and residual gas fraction in cylinder are particularly important to obtain a better understanding of the mechanisms for combustion and emissions, especially during cold sta rt and throttle transient condition.<br/> This paper reports the cycle resolved measurements of residual gas fraction and equivalence ratio near spark plug with cam phasing and its effects on combustion characteristics at part load. The results showed that the effect of intake valve opening on the residual gas fraction was smaller than that of exhaust valve closing because of bumed gas back :low decreases from exhaust port at the same valve overlap. The standard deviation of equivalence ratio near spark plug increased with valve overlap increases and its effect affected the heat release rate, COVimep, etc.<br/>