RCM 기반 철도시설물 고장분석시스템 구축 : 서울메트로

정관수(Kwan-Soo Jung),서광혁(Kwang-Hyuk Seo),이정주(Jung-Joo Lee),남진근(Jin-Geun Nam) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.10

Seoul Metro railway facilities' inspection and maintenance tasks cause failure analysis but if there is trouble the diverse cause investigation and the systematic analysis and management among broken facilities related facilities and components fell short and the conditions are different. And excess and insufficiency under inspection and maintenance is being raised regardless of the introduction year and the operating environment including the number of use by applying the same facilities in the uniform inspection cycle. In this study we will analysis systematically facility system information failures operational status performance fault and maintenance information resulting from the maintenance management of railway facilities and derive the relationship between associated equipment and its components. In addition optimizing the inspection and the maintenance cycles of railway facilities we will improve the reliability of operation. Considering the probability of risk it is possible to predict the occurrence of accidents or faults and to minimize the frequency of breakdown by pre-inspection maintenance. Finally This paper is to introduce the content of constructing the Seoul Metro RCM-based failure analysis system for railway facilities to support the optimal continuance of operation status of equipments and the securement of the safe operation of vehicles.

오픈소스를 이용한 항공정비 실습용 릴레이 점검장치 개발

정관수(Kwan-su Jung),이윤열(Yun-Yeol Lee),윤명섭(Myung-Seob Yoon),이창민(Chang-Min Lee) 한국컴퓨터정보학회 2020 한국컴퓨터정보학회 학술발표논문집 Vol.28 No.2

제방 누수 감지 시스템 개발

정관수(Jung, Kwan Sue),이광만(Lee, Gwang Man),김기수(Kim, Ki Soo) 대한토목학회 2012 대한토목학회 학술대회 Vol.2012 No.10

원자력연구시설 해체비용 산정 구조

정관성,이동규,이근우,오원진,정종헌,박진호,Jeong Kwan-Seong,Lee Dong-Gyu,Lee Kune-Woo,Oh Won-Zin,Jung Chong-Hun,Park Jin-Ho 한국방사성폐기물학회 2006 방사성폐기물학회지 Vol.4 No.2

Decommissioning cost estimation is a very important technique in designing and planning of nuclear facilities' decommissioning. Decommissioning cost estimation should be made according to the phases of decommissioning activities and installed components of nuclear facilities. In this paper, the basic framework necessary for decommissioning cost estimation is completed so that it could be used as a technique for decommissioning costs estimation by specifying cost items and group components and unit cost factors on which work time is calculated. Also, factors to be considered for decommissioning cost estimation of major activities and tasks are reviewed. Afterwards, these techniques will be utilized as a basic technology to establish methodology of decommissioning cost estimation and evaluation.

연구용원자로 해체비용 산정을 위한 단위비용인자 산출

정관성,이동규,정종헌,이근우,Jeong, Kwan-Seong,Lee, Dong-Gyu,Jung, Chong-Hun,Lee, Kune-Woo 한국방사성폐기물학회 2006 방사성폐기물학회지 Vol.4 No.4

The estimated decommissioning cost of nuclear research reactor is calculated by applying a unit cost factor-based engineering cost calculation method on which classification of decommissioning works fitted with the features and specifications of decommissioning objects and establishment of composition factors are based. Decommissioning cost of nuclear research reactor is composed of labor cost, equipment and materials cost. Labor cost of decommissioning costs in decommissioning works are calculated on the basis of working time consumed in decommissioning objects. In this paper, the unit cost factors and work difficulty factors which are needed to calculate the labor cost in estimating decommissioning cost of nuclear research reactor are derived and figured out.

남북공유하천의 문제점과 협력 방향

이광만(Lee Gwang Man),강부식(Kang Boo Sick),정관수(Jung Kwan Su) 대한토목학회 2008 대한토목학회 학술대회 Vol.2008 No.10

점농어, Lateolabrax sp. 소화관의 내부 형태 및 조직화학적 특징

이정식(Jung Sick LEE),정관식(Kwan Sik JEONG),허성회(Sung Hoi HUH) 전남대학교 수산과학연구소 1998 수산과학연구소논문집 Vol.7 No.-

The digestive tract of the spotted sea bass, Lateolabrax sp. composed of esophagus, stomach, intestine and seventeen or eighteen pyloric caeca. The relative length of gut (RLG), that is length of digestive tract to standard length, is 0.79 (n=10). Esophagus have a undeveloped submucosa and well developed muscularis mucosae. In the stomach, muscularis consists of longitudinal and circular muscle layer, and submucosa and muscularis mucosae are well developed. In the body stomach, microvilli are observed in the epithelial layer. Mucosal epithelium of the pyloric caeca and intestine composed of columnar epithelium with developed microvilli in the apical portion. Intestine have a advanced striated border and more abundant goblet cells than the pyloric caeca. Intestine is divided into the anterior, mid and posterior part by the external and histological features. The anterior intestine have a more abundant goblet cells than the other part of the intestine. The mid intestine have a advanced submucosa and more abundant absorptive cells than the other part of the intestine. And the posterior intestine have a advanced mucosal folds and muscularis.

태권도학과 재학생의 진로의식 및 방향모색

정두환(Jung Du-Hwan),정관묵(Jeong Kwan-Mook),최정규(Choi, Jeong-Gyu),이수진(Lee, Su-Jin),전정우(Jeon, Jung-Woo) 경희대학교 스포츠과학연구원 2010 태권도과학 Vol.3 No.2

본 연구의 목적은 태권도학과 대학생들의 진로의식에 대한 시각과 방향에 대하여 인구통계학적 특성에 따라 분석하여 진로에 대한 방향 모색을 위한 기초자료를 제시하는데 있다. 모집단은 한국대학생태권도연합회 소속 5개대학의 태권도학과 재학생 550명을 대상으로 자기기입식 설문지 배포 후 회수하지 못한 설문지와 불성실한 설문지를 제외한 534부의 설문지를 SPSS 17.0을 사용하여 분석하였다. 설문지 문항은 인구통계학적 요인 6문항과, 진로의식과 관련된 문항 7개를 사용하였다. 첫째, 대상자의 인구통계학적 특성은 남자가 67.6%로 나타났고, 여자 32.4%로 나타났다. 학년은 1학년이 41.0%, 2학년 27.3%, 3학년 20.2%, 4학년 11.4%로 나타났다. 태권도수련경력은 5년 이상이 87.8%로 가장 많았으며, 현단은 4단이 73.8%로 가장 많았다. 태권도를 수련한 시기로는 초등학교 때가 60.5%로 나타났다. 둘째, 태권도 분야 진로에 대한 의식으로 진로 선택 시 고려요인으로 1학년, 2학년, 3학년, 4학년의 경우 모두 적성이 가장 높게 나타났다. 1학년, 2학년의 경우 외국어가 64명으로 가장 높게 나타났다, 하지만 3학년, 4학년의 경우 불확실한 미래가 가장 높게 나타났다. 셋째, 재학생의 진로결정에 대한 직업선택의 희망 도는 전공과 관련된 직업을 희망하는 비율이 높게 나타났다. 희망하는 요인으로 태권도를 좋아해서가 가장 높게 나타났다. 반면 희망하지 않은 요인으로는 다른 비전이 가장 높게 나타났다. The purpose of this study is to analyze the standpoint of career consciousness by suggesting basic information about the career path for students majoring in Taekwondo according to the standpoint of career consciousness. We distributed questionnaires to the students who are majoring in Taekwondo at five universities associated with the University Taekwondo Students Association. Then we analyzed 534 questionnaires by using SPSS 17.0 except the half-hearted answers and the papers which couldn't be collected. The questionnaire is composed of 6 items for the causes of demography and 7 items for the career consciousness. The general character is drawn through above-mentioned are below: first, the result of demographic character showed 67.6% of men, 32.4% of women. Also, the grade distribution was: freshmen 41.0%, sophomore 27.3%, junior 20.2% and senior 11.4%. The greatest response of Taekwondo training year was 'over 5 years', 87.8% and the most grade of possessed Dan is 'fourth Dan', 73.8%. Moreover, the largest response of the period of training Taekwondo was 'elementary school', 60.5%. Second, the consideration point for Taekwondo part showed that 'aptitude' was the highest answer among all years. As well as 'foreign language' was the greatest answer between freshman and sophomore. The highest answer was, however, 'uncertain future' between juniors and seniors. Third, a many students wish to get the job related with major. The highest answer of the cause of wishing was 'liking'. On the other hand, the factors students were avoiding a career regarding Taekwondo were their change of interest, no vision, saturation of the gyms, non-matching aptitude, etc.

하수관망의 간소화가 도시침수 모의에 미치는 영향 분석에 관한 연구

이승수,정관수,김연수,Lee, Seung-Soo,Pakdimanivong, Mary,Jung, Kwan-Sue,Kim, Yeonsu 한국수자원학회 2018 한국수자원학회논문집 Vol.51 No.4

도시유역에서 발생한 유출은 지표면뿐만 아니라 하수관망을 통해 배수되며, 도시침수 모의 수행시 하수관망을 수문학적 배수 시스템의 한 구성요로서 고려하는 것은 매우 중요하다. 그러나 도시 침수 모의를 수행하는 대부분의 연구자들이 적절한 기준에 준하지 않고 직관적으로 하수관망을 단순화시켜 모의를 수행하는 실정이다. 따라서 본 연구에서는 1D-2D 결합 도시침수 해석 모형을 이용하여 수지상 구조에 구분법에 기반하여 단순화된 하수관망의 도시침수 해석 결과에 미치는 영향을 분석하였다. 하수관망 해석을 위한 1차원 모델은 Lee et al. (2017)에 의해 소개된 모형으로서 지표면과 하수관망 사이의 유입과 역류를 동시에 모의할 수 있고, 2차원 지표면 모델은 불규칙 삼각망을 이용하여 지표수 흐름을 모의하며 1차원 하수관망 해석모형과 연계되어 도시침수를 모의할 수 있다. 하수관망은 수지상 구조 구분법에 기반하여 2차, 3차 그리고 단순화 하지 않은 경우로 구분할 수 있으며, 구분된 각 하수관망은 서울시 사당역 인근에 많은 침수 피해를 발생시킨 2011년 7월 27일 강우 사상에 적용하여 제안된 방법의 적용성을 평가하였다. 모든 케이스에 대하여 침수면적, 지표면에서 하수관망으로의 유입 유량, 하수관망에서 지표면으로의 역류 유량 등을 비교하였으며, 마지막으로 하수관망 단순화를 위한 적절한 기준 제시에 대한 논의를 수행하였다. In urban areas, runoff flow is drained through sewer networks as well as surface areas. Therefore, it is very important to consider sewer networks as a component of hydrological drainage processes when conducting urban inundation modelling. However, most researchers who have implemented urban inundation/flood modelling, instinctively simplified the sewer networks without the appropriate criteria. In this research, a 1D-2D fully coupled urban inundation model is applied to estimate the influence of sewer network simplification on urban inundation modelling based on the dendritic network classification. The one-dimensional (1D) sewerage system analysis model, which was introduced by Lee et al. (2017), is used to simulate inlet and overflow phenomena by interacting with surface flow. Two-dimensional (2D) unstructured meshes are also applied to simulate surface flow and are combined with the 1D sewerage analysis model. Sewer network pipes are simplified based on the dendritic network classification method, namely the second and third order, and all cases of pipes are conducted as a control group. Each classified network case, including a control group, is evaluated through their application to the 27 July 2011 extreme rainfall event, which caused severe inundation damages in the Sadang area in Seoul, South Korea. All cases are compared together regarding inundation area, inflow discharge and overflow discharge. Finally, relevant criterion for the simplification method is recommended.

DEM을 이용한 수로망 산정 기법에 따른 유역의 배수구조 평가

이기하(Lee Gi Ha),윤의혁(Yoon Eui Hyeok),김주철(Kim Joo Cheol),정관수(Jung Kwan Sue) 대한토목학회 2011 대한토목학회논문집 B Vol.31 No.1B

DEM을 이용한 수로망의 생성은 수문해석모형의 적용을 위한 전처리 과정으로써 실제 유역시스템의 배수구조를 결정하는 중요한 인자로 활용된다. 본 연구에서는 DEM으로부터 합리적인 수로망 추출과정 수립을 목적으로 보편적으로 사용되고 있는 면적한계기준과 국부경사와 기여면적사이의 특성에 근거한 경사-면적한계기준 기법을 이용하여 수로망을 생성하고 지형법칙에 의거하여 각 기법에 따른 소규모 유역(진안천 유역; 18.28 ㎢) 배수구조의 신뢰성을 평가하였다. 그 결과, 면적한계 기준 기법은 수원유역의 크기의 인위적 결정에 의해 지형법칙을 만족시키지 못하고 유역전체의 배수구조를 왜곡되게 묘사한 반면, 경사-면적한계기준 기법의 경우 물리적인 지형법칙을 만족시키는 우수한 결과를 나타냈다. 따라서 경사-면적한계기준 기법은 DEM 기반의 수문모형을 적용 시 효율적이고 객관적인 수로망 생성을 위한 방법론으로서 활용이 가능하리라 판단된다. Channel network delineation from DEM (Digital Elevation Model) is a fundamental pre-process for hydrologic model application since it determines the drainage system in a watershed. This study aims to propose an effective and efficient channel network delineation process and assess the effects of DEM-based channel networks on the watershed drainage system. For these objectives, we applied two methods to generate the channel networks of the Jinan-cheon catchment with 18.28 ㎢ from the 20 m resolution DEM: a widely-used area-threshold method and a slope-area threshold method based on the relationship between contributing areas and local slopes. The results showed that the area-threshold method led to unreliable drainage system, which did not satisfy geomorphological laws with respect to drainage density and source area representation whereas the slope-area threshold method provided acceptable results under the geomorphological laws. Our suggestions in this study can give valuable pre-processing information in DEM-based hydrologic modeling.