• Journal of Korean Society of Transportation
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• v.24 no.5 s.91
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• pp.45-56
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• 2006

In order to construct an information pool on the production characteristics and efficiency of Korean railroad industry, various alternative approaches have to be applied. In this paper we present an empirical application of the distance function to measure the technical efficiency and the production characteristics of Korean railroad industry, The distance function firstly introduced by Shephard (1953) provides the advantage that it does not need information about prices, so it can accommodate the multiple output nature of the railway only using the quantifies as data. This is of great relevance in the context of the public sector such as railroad industry where there are often distinct control mechanisms on input prices. Also the distance function allows us to obtain a measure of technical efficiency as well as a measure of production characteristics. From annual data on Korean railroad industry during 1964-2004, multiple output distance function is estimated using quadratic programming model. The resulting technical efficiency estimates has tended to be improved over the period $1980{\sim}2004$. The indirect Morishima elasticities of substitution indicate that the substitutabilities for labor are relatively very low or impossible. The average scale elasticity is 2.7 which means that increasing the scale by 1per cent will result in an output increase by 2.7 percent. This result indicates that economies of scale are present in the Korean railroad industry.

• 전기산업
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• v.9 no.2
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• pp.56-68
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• 1998

• 월간산업보건
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• s.225
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• pp.77-87
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• 2007

• Journal of the Korean Society for Railway
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• v.12 no.4
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• pp.557-564
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• 2009

This study compared KORAIL's procurement tasks with that of other companies. after analyzing the institutional and operational problems in procurement tasks especially in the respect of rolling stock and components which are KORAIL's major purchasing items, this study presented the way of purchasing cost Reduction through improving and streamlining procurement tasks.

• Proceedings of the Korean Vacuum Society Conference
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• 2013.08a
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• pp.61.1-61.1
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• 2013

최근 지구온난화 및 원유 공급 감소 또는 고갈로 에너지 효율성 높고 저탄소 녹색성장을 주도할 수 있는 철도산업에 대한 관심이 고조되고 있다. 초고속 자기부상철도는 에너지 효율이 높은 경제적인 교통수단으로써, 단위 수송당(인-km) 온실가스 배출량이 자동차의 38%, 항공기의 17%에 불과하고, 같은 궤도운송시스템인 고속철도에 비해서도 77%에 불과하고 단위수송당 에너지 소비율이 항공기의 80% 수준에 불과하므로, 화석에너지의 고갈이 예상되는 미래에 장거리 고속 이동 수단으로써 중요성이 확대되고 있다. 또한, 비접촉 추진 방식이므로 바퀴 접촉식 고속철도에 비해서 유지보수 비용이 저렴하고(34%에 불과) 고속철도에 비해 10dB 이상 소음 발생이 적은 수명주기 비용 및 환경측면에서 기존 철도시스템에 비해서 경쟁력이 있으므로 시급한 개발과 활용이 요구되고 있다. 본 연구에서는 초고속 자기부상철도 연구와 관련된 국내외 연구동향과 함께, 국가연구개발사업으로 추진중인 초고속 자기부상철도 핵심기술개발사업에 대해 살펴보았다. 또한, 미래기술로 각광을 받고 있는 튜브트레인 기술에 대해서도 알아보았다.

• The Journal of the Korea institute of electronic communication sciences
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• v.9 no.7
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• pp.819-825
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• 2014

The diurnal range of temperature in korea is increasing. We know that the environment has deteriorated through report about railway damage and economic loss caused by climate. In these conditions, Monitoring device for railway must operate to support the operations and maintenance. Therefore, In this paper, COM-based monitoring device implemented using Industrial-Extended electronic components and made, We tested compliance about temperature environment of actual railway. We verified through testing about cold and dry heat of monitoring device. Used components in this product will be able to utilize the development of the railway industry of electronics.

• The Journal of the Korea institute of electronic communication sciences
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• v.16 no.6
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• pp.1069-1074
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• 2021

Recently, mobile communication technology has new eras with supply of 5G commercial communication. 5G mobile communication service is currently supplied with city area, services will be quickly expanded to entire area of country. This mmWave based 5G mobile communication is under spreading for human communication with voice and Internet service. After completion of construction of this human communication, this technology will be expanded to industrial communications. Railway communication system is an example of this industrial communications. In this, performance of traffic transmission for railway communication network based on this 5G railway communication networks will be analyzed with computer simulations. Construction requirements of 5G railway communication networks will be suggested with this analysis results.

• Proceedings of the Korean Institute of Industrial Safety Conference
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• 2002.11a
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• pp.185-190
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• 2002

교량 공사는 우선 한강다리 건설공사만 해도 그간 많은 완성과 실패를 뉴스매체를 통해 보고 있다. 고속철도 공단주도의 경부고속철도 건설을 위한 교량은 수상, 육상 등 모든 부분에 적용되어 있다. 기존 교량에 대한 교통량 증가로 확장공사가 이루어지고 있기도 하다. 교량은 산업기반 시설이 되므로 규모가 크고 인력보다는 대형 건설기계가 소요된다 한국산업안전공단의 조사보고서(2002. 6)에 의하면 토목공사에서 18.7%의 사고율을 점하고 있고, 이중도로 9.9, 교량터널 1.1%을 점유하고 있다.(중략)

• The Journal of the Korea institute of electronic communication sciences
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• v.9 no.2
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• pp.219-230
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• 2014

There are many economical and industrial as well as social demands enabling smart management of railway vehicle including parts management by introducing RFID system in railway vehicle. In this paper, overseas researches and developments which use cases of RFID were investigated and analyzed. In this process, cases of various industries adopting RFID technology as well as cases of railway part were investigated. RFID system is used mainly for railway vehicle position detection and identification of vehicles in the field of railway. Also there are cases of application on traceability management of railway vehicle parts. The system in which RFID technology can be applied to railway parts management and traceability management is necessary for smart management of domestic railway vehicle.

• Proceedings of the Safety Management and Science Conference
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• 2010.11a
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• pp.651-668
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• 2010

철도 시스템은 차량, 전력, 신호, 선로구축물시스템이 유기적으로 결합된 복합시스템으로 사고 발생 시 원인규명이 어렵고 인명에 치명적인 결과를 초래하게 되며 사소한 고장이라도 열차지연에 미치는 파급효과는 지대하여 시스템의 신뢰성확보가 매우 중요하다[26]. 실제로 세계 각국의 철도산업은 시스템의 신뢰성 향상을 위해 신뢰성 기법에 기반을 둔 다양한 이론을 통해 신뢰성 향상과 안전성 향상에 최선을 다하고 있다. 본 연구에서는 철도 신뢰성관리와 관련된 국내 연구동향과 철도 운영기관 및 기업에서 적용하고 있는 신뢰성 적용 현황을 분석한다. 그리고 국외 연구 동향과 주요 적용 현황을 정리한다. 또한 철도 신뢰성과 관련된 국내외 규격을 조사하고 이들 규격의 내용을 분석한 후 국내 적용방향을 제시한다.