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임연수(Yeon-Su Lim),오지은(Ji-Eun Oh),공명상(Myung-Sang Kong),강찬용(Chan-Yong Kang) 한국철도학회 2016 한국철도학회 학술발표대회논문집 Vol.2016 No.10
철도차량 RAMS 관련 규격인 EN50126과 EN50129는 위험도 수용 원칙 (Risk Acceptance Principle)을 고려한 허용가능 위험율 (Tolerable Hazardous Rate, THR) 및 안전무결도(SIL)의 할당과 적용 방안을 기술하고 있다. 철도차량의 안전 기능은 여러 하위 시스템에 의해 구현되는 다양한 안전 기능의 통합적인 기능인 반면, 일반적으로 안전무결도는 간단한 기능을 수행하는 독립적인 장치에 적용된다. 본 논문에서는 해외 운영사의 승객끌림 방지 기능에 대한 안전무결도 적용 사례를 통해 각 장치 레벨의 안전무결도 뿐 아니라 차량 레벨에서의 안전무결도 적용에 대한 방법론을 제시하고자 한다. Railways RAMS related standard, EN50126 and EN50129 describe methodology for the Tolerable Hazardous Rate allocation and Safety Integrity Level application, based on the Risk Acceptance Principle. Almost train level safety critical functions are the integrated ones from the various sub-functions implemented by many sub-systems, while Safety Integrity Level is generally applicable for the standalone equipment providing simple function. The methodology for the train level SIL application in addition to the equipment level SIL application is proposed in this paper based on the example from the overseas railway operator for the SIL application on the Anti-Drag Function.
김경식(Kim Kyoung-Shik),이종성(Lee Jong-Seong),강리택(Kang Lee-Teag),임연수(Lim Yeon-Su) 한국철도학회 2007 한국철도학회 학술발표대회논문집 Vol.- No.-
Onboard ATC performs the train speed ristriction function by receiving the speed limit on sections of track from wayside ATC. Onboard ATC can protect passenger from collision and derailment, and so on. So, the high level of safety and reliability for Onboard ATC is required, and by this reason, it is also required to improve the safety of Onboard ATC by applying the result of safety analysis on the Onboard ATC into its design and developing from the concept definition to the detailed desing phase. The paper introduces, when developing Onboard ATC, the safety improvement of Onboard ATC can be accomplished by applying system requirements from Risk Analysis into software and hardware.
Ha-Young Kim(김하영),Jae-Won Byun(변재원),Albert Byungyun Jeon(전병윤),Bum Soo Park(박범수),Ji-A Jung(정지아),Mihak Park(박미학),Yeon-Su Lim(임연수),Byeong Yeal Jung(정병열) 한국생명과학회 2012 생명과학회지 Vol.22 No.6
요네병은 Mycobacterium avium subspecies paratuberculosis에 의해 발생하며 반추동물에서 만성 쇠약을 일으켜 전세계적으로 양축산업에 커다란 경제적 손실을 일으키는 질병이다. 본 연구에서는 2008년부터 2009년까지 2년동안 의뢰된 총 3,927건의 국가 종축우의 혈청에 대한 요네병의 항체 양성률에 대해 조사한 결과 21두(0.5%)에서 항체 양성을 나타내었으며 이는 국내 일반 농가의 양성률(1.2-16.4%) 보다 현저히 낮은 수준이었다. 또한 연령별 양성률은 2세 미만에서 0.2% (3두), 2-3세에서 0.4% (2두), 3-4세에서 0.7% (3두), 4세 초과에서 0.9% (13두)로 전연령에서 양성이 나타났으나 연령이 높아짐에 따라 양성률이 증가하는 경향을 보였다. 품종 별로는 젖소는 모두 음성이었으며 한우에서만 양성률 0.6%를 나타내었다. Paratuberculosis (Johne’s disease), a chronic wasting disease caused by Mycobacterium avium subspecies paratuberculosis (MAP), is a major cause of economic loss in the cattle industry. In Korea, national monitoring of breeding stock for MAP has been implemented. In this study, we report the results of serological testing to determine the prevalence of MAP in breeding stock of Korean native and dairy cattle during 2008 and 2009. A total of 3,927 serum samples were submitted (3,692 Korean native cattle and 235 dairy cattle) to Animal Disease Diagnostic Division, Animal, Plant and Fisheries Quarantine and Inspection Agency. The samples were classified into four different age groups for MAP; group 1 (≤2 year, n = 1,509), group 2 (>2 years to≤3 years, n = 486), group 3 (>3 years to ≤4 years, n = 441), and group 4 (>4 years, n = 1,491). Overall seroprevalence of MAP in this study was 0.5% (21/3,927), which was much lower than that of conventional cattle (1.2-16.4%) in Korea. Also, the seroprevalence was determined by age groups: three of group 1 (0.2%), two of group 2 (0.4%), three of group 3 (0.7%), and 13 of group 4 (0.9%) were seropositive for MAP, respectively. Although seropositive samples were found in all age groups, the seroprevalence tended to increase with age. Our study showed that the seroprevalence of MAP in pure-bred breeding dairy cattle (0%) was lower than that in pure-bred breeding Korean native cattle (0.6%).