• 대한교통학회지
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• 제24권2호
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• pp.65-78
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• 2006

본 연구는 한국과 일본의 철도업체를 노동, 동력, 유지보수, 그리고 차량 및 자본의 네 가지 생산요소를 투입하여 신칸센 인키로. 일반여객 인키론 톤키로의 세 가지 산출물을 생산하는 기업형태로 상정하여 일반초월대수 함수형태의 총비용함수모형을 설정하였다. 이때 네트워크효과를 나타내는 궤도연장, 한국과 일본의 비용구조 차이를 반영하는 국가더미변수, 소유구조에 따른 차이를 반영하는 민영화더미변수, 그리고 생산성 증가율을 분석하기 위한 시간변수를 함께 포함시켰다. 총비용함수모형은 철도청에 대한 27개 연도별 자료$(1977{\sim}2003)$. 일본국철(JNR, Japan National Railways)에 대한 8개 연도별 자료$(1977{\sim}1984)$. 그리고 7개 일본철도주식회사(JR's Japan Railways)에 대한 17개 연도별 자료 $(1987{\sim}2003)$를 결합한 총 154개의 불균형통합자료를 이용해 반복결합일반화 최소자승 법으로 추정하였다. 일반초월대수 총비용함수모형의 추정결과로부터 밀도, 규모 및 범위의 경제성 지수를 각각 산정한 결과 한국과 일본의 철도산업은 표본평균값에서 신칸센, 일반여객과 화물운송부문별로 각각 산출물별 밀도의 경제 및 전반적인 밀도의 경제가 존재하고, 산출물별 규모의 불경제가 존재하나 신칸센/일반여객과 화물을 제외한 일반여객/신칸센과 화물, 그리고 화물/신칸센과 일반여객 운송부문간에 범위의 경제가 존재하여 전반적으로는 다소 적은 규모의 경제가 존재하는 것으로 나타났다. KNR과 일본의 JR동일본. JR동해, JR서일본의 $1990{\sim}2003$년에 해당하는 각 업체별 평균값에서 밀도와 규모의 경제성 지수를 각각 산정한 결과 표본평균값에서 산정한 값과 비슷한 경향을 나타내었으나, 범위의 경제성 지수의 경우 JR 동해는 신칸센과 일반여객운송부문간 범위의 경제가 존재하지만 JR 동일본과 JR서일본의 경우 범위의 불경제가 존재하는 것으로 나타났다. 생산성 증가율은 전반적으로 민영업체인 JR's의 생산성 증가율이 국영업체인 KNR보다 더 큰 것으로 나타났다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2004년도 춘계학술대회 논문집
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• pp.494-500
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• 2004

The purpose of this thesis is to know and understand the user requirements to provide with intelligent railway information service in response to the Ubiquitous environment. The railroad specially has a disadvantage of door-to-door service, however by using the information and communication techniques, we can provide the passengers who are using the intermodal transportation means with the realtime information, therefore we can overcome the above disadvantage. To deduce the passenger's needs for providing the future-type railway information service, we introduce the results of the questionnaire. In chapter 2, we studies on the concepts of intelligent railway information service, and in chapter 3, we investigate the cases of Japan and China, and in chapter 4, we study the passager's satisfaction by the questionnaire concerning the railway information service and suggest the needs for information offering.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2005년도 춘계학술대회 논문집
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• pp.1028-1032
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• 2005

Life cycle assessment(LCA) has been developed from the concept of life cycle thinking. Life cycle thinking implies that everyone in the whole chain of a product's life cycle, from cradle to grave, has a responsibility and a role to play, taking into account all the relevant external effects. LCA is an analytical tool for identifying environmental loads and assessing the environmental impact in the whole chain of a product's life cycle. In Europe and Japan, LCA and ecodesign study for railway industry have been actively carried out recently. However, LCA for railway industry in domestic is still infant. LCA is standardized in International Organization of Standardization(ISO), base on the ISO 14040 standards, 307 life cycle inventory(LCI) database for infrastructure and base materials have been established in total since 1999. Some of LCI database can use in performing LCA for trains and railway infrastructure, but still not enough to derive accurate LCA result. Therefore, railway oriented LCA methodology and LCI DB are needed to be developed.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2007년도 추계학술대회 논문집
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• pp.1738-1743
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• 2007

The newly established high speed railway station may function not only just as a traffic convergence but also as an energizing force with multiple roles in the context of municipal environment. As a result, the development of high speed railway station zone will be considered as great opportunities as well to enhance quality of life of the neighboring inhabitants, as to develop new footholds for the inner-municipal growth and mobilization. The main purpose of this article is to offer guidelines about the effects of development of the high speed railway station zone seen from multiple aspects of municipal lifes and functions. To attain this purpose, the definition of high speed railway station zone, its characteristics, and its roles will be handled with the case of advanced countries such as Japan and France. And some lessons will be proposed based on them.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2002년도 춘계학술대회 논문집
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• pp.486-491
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• 2002

As the European Union has strengthened and computerized signalling systems have been widely used, the European common standards for the safety of railway signalling systems such as EN 50126, EN 50128, ENV 50129, EN 50159 began to be published from 1996 in CENELEC. At that time, a safety guideline, 'Safety Guidelines for Computerized Train Control and Protection Systems' was published in Japan. The Korean National Railroad also published a safety recommendation for the train control systems with taking into account the Korean railway conditions. Now the preparations for IEC/TC9 Standards are well underway and these standards correspond to CENELEC Standards referred above. These movements and activities are to cope with many technical and operational changes and to reflect the globalization trend of railway sectors along with the computerization of signalling devices. In this connection, this paper studies the globaliztion trend in the safety standards for railway signalling systems and discusses the counterplans for the trend.

• 공학기술논문지
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• 제10권2호
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• pp.203-208
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• 2017

Due to global climate change issues, there is a growing demand for systems throughout the industry. In the case of power conversion, studies have been actively conducted to change the structure of the power conversion circuit and to apply new power devices. In particular, the WBG (Wide Band Gap), which is newly emerged device in the market for developing semiconductor technology, has demonstrated advantages in applying for various aspects in comparison to the existing Si (Silicon) Semiconductor. Recent research centers in the railway industry are focusing on developing technologies suitable for railway vehicles by utilizing these new developments in railway countries such as Japan and Europe. This paper researches the WBG device that is applicable to the auxiliary power supplies (APS) in railway system, and analyzes the downsizing effects to APS in high-speed railway by conducting a theoretical analysis and simulation.

• 한국철도학회논문집
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• 제10권6호
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• pp.670-677
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• 2007

본 연구에서는 1920년 신축되어 등록문화재 제 136호고 등록된 경의선 신촌역사의 건축적 특징을 중심으로 1920년 개설이후 현재에 이르기까지의 변천과정을 살펴보고자 한다. 신촌역사는 서울에서 현존하는 가장 오래된 역사로 역사적, 문화적 가치를 지니고 있고 그와 동시에 개발에 대한 가능성을 통시에 지니고 있었다. 이에 따라 신촌역사는 도심지 내 개발과 보존에 대한 갈등의 성격을 그대로 보여주고 있다. 본 연구는 신촌역사를 중심으로 척도관련시설의 개발과 보존에 대한 현상과 문제점을 진단하고 이에 대한 방향을 찾고자 하였다.

• 한국안전학회지
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• 제15권1호
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• pp.132-139
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• 2000

In this study, the fatigue life assessments of steel railway bridge in Japan National Railway were carried out. This railway bridge has been under in service from 1957, and fatigue damages were occurred at bead toe of upper part of vertical stiffeners of stringers, bead toes of scallop in lower part of vertical stiffeners in stringers and crossings of cross beams and stringers. From this study, a series of field tests were carried out by stress history measurement about above mentioned points. And as a results of stress histogram analysis, cummulative fatigue damage rate and fatigue life of these members should be calculate quantitatively. And from this estimation technique, cummulative fatigue damage rate and fatigue life of this railway bridge were strongly affected in passing tonage every year and the histories of live load.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2006년도 추계학술대회 논문집
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• pp.245-250
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• 2006

From the research which it sees the safety regarding a high-speed railway vehicle collision and a derailment evaluation research it an example and executed. Japan, France, Germany and Spain, Italy and with our country together it compared a high-speed railway vehicle collision of the high-speed railroad operating nation and derailed relation safety standard and safety against the evaluation system trade name comparison it analyzed. The research which it sees it led and the accident instance against the hazard analysis against the collision and a derailment of the high-speed railway vehicle and a risk evaluation together and a high-speed vehicle collision and derailed it cannot prevention plan from hereafter domestic comparison it analyzed forecast it presented.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 추계학술대회 논문집
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• pp.883-890
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• 2008

Dynamic instability of the railway bridge can cause track irregularities and be directly connected with unstable passenger comfort and derailment of the train. Europe and Japan had studied on this problem for a long time since 1960's, Results of those studies are reflected in recent Eurocode and the bridge design code of Japanese railway bridges. However, even though some traffic safety requirements were applied in Kyoung-bu highspeed railway by French engineers, we experienced many difficulties from insufficient information of criteria background and application procedures. In the present study, various studies will be presented for the estimation of dynamic performance will be proposed and procedures and methods of estimation will be shown.