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이인현(In-Hyun Lee),김대현(Dae-Hyun Kim),김민호(Min-Ho Kim),서정욱(Jung-Wook Seo),김두일(Du-Ill Kim),정호형(Ho-Hung Jung) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.5
This paper investigates the current established preventive maintenance and its corresponding data on a point machine among railway signalling facilities and suggests a part of considerable plans when the policy of the preventive maintenance is modified. It is not appropriated to apply the optimized preventive replacement period considered with the cost simply. In that case, it is suggested that the reliability should be analyzed failure mode and effects through collecting the on-site failure data sufficiently. Then, that result can be proposed to adjust the proper criteria into the rational way by comparing the initial maintenance criteria. In this paper, the alternative way to determine the feasibility of the inspection period using failure probability is introduced.
이인현(In-Hyun Lee),하승태(Seung-Tae Ha),김민호(Min-Ho Kim),서정욱(Jung-Wook Seo),김두일(Du-Ill Kim),홍현표(Hyun-Pyo Hong),이병곤(Byung-Gon Lee),반극동(Keuk-Dong Ban) 한국철도학회 2012 한국철도학회 학술발표대회논문집 Vol.2012 No.10
본 논문은 자동 전원절체 통과시스템을 대상으로 수행 중인 신뢰도 및 위험도 분석 과제 결과의 일부분이다. 자동 전원절체 통과시스템은 전차선로 절연구간을 전기차량이 무정전으로 통과할 수 있도록 개발한 시스템으로 크게 열차검지장치와 전원절체 개폐장치로 구성된다. 이 중에서 전원절체 개폐장치를 대상으로 신뢰도 분석을 수행한 것으로 각 컴포넌트의 고장률 예측을 위한 방법, 절차 그리고 시스템 신뢰도 모델링을 수행한 결과를 기술하였다. 신뢰도 예측은 Telcordia SR-332 Issue 2 규격서를 사용하였으며, 향후 이 결과는 위험도(risk) 분석을 위한 기반 자료로 이용될 예정이다. This paper is parts of a result of a project on reliability and risk analysis for automatic changeover system. The automatic changeover system is developed in order that an electrical train can pass through catenary neutral section in an uninterruptible way, and it’s comprised of a train detector and a power switching system. Reliability analysis is performed for a power switching system of them, and a method and a process to predict a failure rate of each component and a result of performing a system reliability modeling are described in this paper. Reliability prediction is in accordance with Telcordia SR-332 Issue 2, and the result will be used for risk analysis as basic input in the future.
서민정 ( Min Jung Suh ),이성하 ( Sung Ha Lee ),김두만 ( Du Man Kim ),국일영 ( Ill Young Kook ),박세현 ( Sae Hyun Park ),박동춘 ( Dong Choon Park ),김대훈 ( Dae Hoon Kim ),윤주희 ( Joo Hee Yoon ) 대한산부인과학회 2006 Obstetrics & Gynecology Science Vol.49 No.6
Malignant neoplasm of the fallopian tube is the rarest of the gynecologic cancers. Vaginal bleeding, vaginal discharge, and pelvic pain are the most common symptoms. Because of these non-specific symptoms, the diagnosis of this Least common neoplasm is rarely made before Laparotomy. The tumor is typically unilateral and has histologic subtypes, endometrioid and serous adenocarcinoma being the most common subtypes. Surgery, clearly the mainstay of treatment, is also the first approach to diagnosis. The procedure of choice is total abdominal hysterectomy with bilateral salpingo-oopho-rectomy. We had experienced one patient with primary tubal cancer, successfully evaluated with Laparoscopy. And then we intend to report the case of the above patient and have a brief discussion about that.
준 정량적 방법의 위험성 평가에 대한 연구 (A study on the risk assessment based on the semi-quantitative methodology)
정다운(Da-Woon Jung),오상민(Sang-Min Oh),유등렬(Deung-Ryeol Yoo),서정욱(Jung-Wook Seo),김두일(Du-Ill Kim) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.5
The various risk assessment methodologies have been introduced in the railway industries. The risk assessment suggested by CENELEC are described with two ways; quantitative and qualitative methods. However, in the industry application level, the quantitative method is hard to apply for a project because of somehow complicated or few statistical figures which was driven from the on-site and the qualitative method is too subject to have the confidence of its results fully. In this paper, the state-of-the-art methods which were suggested in Europe recently are introduced and compared to existing quantitative and qualitative methods. Furthermore, the application measures of railway projects are investigated.