• 한국환경과학회지
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• 제10권6호
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• pp.407-415
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• 2001

A case of air pollution study of estimation of emission rate for source to railroad rolling stock and emissive character about is unusual. Recent emission rate of railroad rolling stock was estimated with emission factor of EPA in three region(Seoul, Incheon, and Gyeonggido). But this EPA factor could be incorrect because Korea and America have a different railroad environment in the variety of fuel and character of railroad rolling stock In this study, emission rate of each line, car and region(district) with omission factor of Korean case(National Railroad Administration, 1997) was estimated. In Busan Metropolitan City, railroad rolling stocks were divided accoding to, each line, car and service. Particularly, the Idle fuel rate omitted in the preceding study was included in calculation fuel rate. Total emission rate of Busan Metropolitan City was 887.41 t/year Each emission rates of Kyeongbu line, Donghaenambu line, Gaya line, Uam line, Bujeon line, and idle was 489.15t, 196.46t, 33.94t, 12.66t, 6.47t, and 48.75t, respectively.

• 품질경영학회지
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• 제41권2호
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• pp.301-322
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• 2013

Purpose: This study aims to determine the needs of customers who use railroads as a mode of transportation and propose customer-oriented improvements in railroad technology by making connections between customer needs and railroad technology. Methods: We primarily used two methods for this study, AHP and QFD. First, AHP was used to evaluate the relative importance among the different components of railroad technology. Second, the QFD was applied to make a link between customer needs and railroad technology. Results: Railroad technology is largely divided into development, maintenance, and support. Empirical results showed the following improvement priorities in development, vehicle, system, line, signal/communication, power, and structure, in maintenance, vehicle, signal/communication, line, process, power, and structure, and in support, safety/precaution, management, environmental energy, operations/logistics, and station. Conclusion: Recognizing limitations in measuring the level of railroad technology when using the existing 'Technology Growth Model,' we used AHP and QFD to explore improvement directions for customer-oriented railroad technology. By offering customer-oriented services based on this study, railroad service providers will be able to acquire competitive advantage in the market.

• 한국안전학회지
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• 제28권6호
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• pp.79-83
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• 2013

The advent of private railroad corporations presented many problems on administration's effectiveness. These brought an effect on safety management too. Most public railroad corporations maintain their rolling stocks and facilities by their own workers. On the other hand, private railroad corporations depend on outsourcing to cut down the cost of maintenance. But they have similar safety management systems. Therefore we investigated the gap between the two types of corporations, focusing on workers' safety attitude and proposed solutions to improve safety management systems in private railroad corporations.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2007년도 춘계학술대회 논문집
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• pp.594-599
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• 2007

According to separation policy between rail infrastructure and operation, the National Railroad Administration was converted to Korea Railroad Cooperation on Jan, 2005. That makes railway service assessment regarded as essential. About this matter, Section 15 of the Framework Act on Rail Industry Development and section 26 of the Rail Business Act shows that the railway service assessment should be conducted every 2 years. The government can officially announce the result and give orders operation company to improve service level. In the first railway service assessment in 2006, the principal railroad lines and stations were investigated. Rail supply service index and customer satisfaction index are introduced. It includes service items of supply, reliability, convenience, safety and customer satisfaction. This study presents the contents of 2006 rail service assessment. Some points of assessment which should be improved are analyzed as well.

• Smart Structures and Systems
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• 제29권2호
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• pp.361-374
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• 2022

As civil infrastructure has continued to age worldwide, its structural integrity has been threatened owing to material deteriorations and continual loadings from the external environment. Structural Health Monitoring (SHM) has emerged as a cost-efficient method for ensuring structural safety and durability. As SHM research has gradually addressed an increasing number of structure-related problems, it has become difficult to understand the changing research topic trends. Although previous review papers have analyzed research trends on specific SHM topics, these studies have faced challenges in providing (1) consistent insights regarding macroscopic SHM research trends, (2) empirical evidence for research topic changes in overall SHM fields, and (3) methodological validations for the insights. To overcome these challenges, this study proposes a framework tailored to capturing the trends of research topics in SHM through a bibliometric and network analysis. The framework is applied to track SHM research topics over 15 years by identifying both quantitative and relational changes in the author keywords provided from representative SHM journals. The results of this study confirm that overall SHM research has become diversified and multi-disciplinary. Especially, the rapidly growing research topics are tightly related to applying machine learning and computer vision techniques to solve SHM-related issues. In addition, the research topic network indicates that damage detection and vibration control have been both steadily and actively studied in SHM research.

• 한국안전학회지
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• 제20권4호
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• pp.114-121
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• 2005

Railroad shunting movements connecting and disconnecting train sets are very susceptible to human errors since they depend on human decision-making and action procedure that are variable to situation to situation. Nevertheless, in the investigation of railroad accidents, all the accident causes related with human factors have merely been categorized as 'careless treatment' of the workers without any systematic approach of behavioral sciences or the analysis of human errors. In this research, therefore, 137 accident cases occurred during railroad shunting movements and 435 accident cases occurred during driving were analyzed with a special interest of human errors. According to results, the traditional accident investigation scheme used for last several decades did not seem to be appropriate for catching up true accident causes with respect to human errors. In addition, both signal men and locomotive drivers made many mistakes in judgement/action stage while the former mainly commit judgement tasks where as the latter mainly commit cognition tasks. Ant those tasks such as 'confirmation of signal and route', 'location check-up of connected train sets', and 'route identification for a shift of track' ranked highly for accident susceptibility.

• 헤리티지:역사와 과학
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• 제51권2호
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• pp.38-57
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• 2018

철도문화유산에 대한 발굴과 보존 연구는 문화재청을 중심으로 근대 문화유산등록제도와 근대 철도교통문화유산 발굴 작업 등에 국한되어 왔다. 한편 철도관련 단체 등의 노력은 미비하였고 철도공사에서 철도문화유산 보존을 위한 내부지침을 만들어 시행하고 있는 정도에 머무르고 있다. 이러한 문제점에 주목하여 본 연구는 철도문화유산 중 철도차량유산을 중심으로 보존 및 활성화의 당위성을 주장하고 그 방안을 제시하고자 하였다. 이러한 목적을 달성하기 위해 철도차량유산의 현장답사를 통해 보존현황을 파악하였고, 해외의 보존사례를 조사하였으며, 이를 바탕으로 철도차량유산의 역사적 가치를 인식하고, 널리 알리는 활성화 방안을 제시하고자 하였다. 연구 결과 첫째, 등록문화재로 등록된 철도차량유산들은 한 장소에서 보존 전시만 할 것이 아니라 보존 차량의 개방 및 관람대를 제공하여 관람을 가능하게 해야 한다. 둘째, 천연기념물이나 무형문화재와 같이 철도를 하나의 문화재 범주로 인식하고 문화재보호법 개정을 통해 문화재 항목을 신설해야 한다. 셋째, sns 및 블로그와 카페를 활용한 전략적 홍보를 통해 전체 국민을 대상으로 한 철도문화유산에 대한 관심도를 증가시키고, 철도문화유산에 대한 인식을 제고해야 한다. 넷째, 법령 및 제도적 지원과 더불어 철도차량유산을 관리하고 이를 운영할 예산, 전담부서, 전담인원의 충원은 문화재 관리역량 강화를 위해 우선적으로 해결되어야 한다. 이상의 연구결과에서와 같이 철도문화유산의 합리적인 보존과 활성화를 위해서는 행정적, 재정적 지원 및 법적 조항을 만들어 철도산업발전기본법에 보존의 근거를 만들어야 할 필요성이 있다. 철도차량유산은 그 보존 가치가 높고, 지역의 상징이자 역사의 흔적이며, 삶의 기록으로서 사회적 가치를 가진다. 이러한 상황에서 정책 및 보호법 개정에 대한 기준의 정립이 시급할 것으로 판단된다.

• 품질경영학회지
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• 제44권1호
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• pp.43-60
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• 2016

Purpose: This paper reviews the papers on TQM issues which are published in the Journal of the Korean Society for Quality Management (KSQM) since 1965. The literature review is purposed to survey a variety of TQM issues for several categories. Methods: We divide all of TQM issues into 6 categories: ISO system, quality assurance, quality management theory, empirical study on quality management, quality awards, and quality management etc. Results: Dividing all of papers on TQM published in KSQM for 50 years into 6 categories, we provide a chronological roadmap for individual categories, and summarize the contents and contributions of surveyed papers. Conclusion: The review paper is expected to provide future direction to improve TQM theories and applications in manufacturing and service industries.

• 한국철도학회논문집
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• 제10권1호
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• pp.16-21
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• 2007

Along with the opening of the high speed railroad in 2004, the number of long tunnels constructed is increasing and will be continued. In this respect, the fro inside the tunnels is a main cause of drastic damages to both facilities and lives of passengers on board, especially more severe consequences are expected if the fire occurs on a train in urban area. Even though, the threat to human lives due to the increasing number of tong tunnels and increasing train operation times inside such tunnels is getting bigger, the studies to measure safety of the tunnel and to enhance the safety of passengers have not been carried out enough in Korea. Therefore, in this paper, we will use the probabilistic method to predict the average number of deaths of passengers in case of fire on a train iii tunnel, and show the potential risk to passengers which can be a guide for safer design of tunnels to be constructed.

• 품질경영학회지
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• 제42권1호
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• pp.43-61
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• 2014

Purpose: This study identifies preventive measures for VOC management by analyzing the causes and effects of factors that contribute to high risk service failure using FMEA on KORAIL VOC data. Methods: Two research methods were used. First, a Risk Priority Number (RPN) was assigned to each KORAIL VOC based on Failure Mode and Effect Analysis (FMEA). Second, multiple regression analysis was run with RPN factors that include severity, occurrence, and detection as the independent variables and customer dissatisfaction as the dependent variable. Results: Multiple regression analysis showed that RPN factors including severity, occurrence, and detection had significantly positive relationship with customer dissatisfaction. Based on these results, an FMEA was performed on VOC categories with high RPN for railroad stations including platform, ticketing, ticket verification, parking, and escalator, and VOC categories with high RPN for trains including entrance doors, cafes, air quality, announcement, and ticket verification. Conclusion: This study has practical implications to service failure management. A priority order using FMEA was established for the list of customer dissatisfactions that should be addressed to actively manage service failure, and strategies for tackling this priority list are offered.