• Railway Journal
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• v.12 no.1
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• pp.20-25
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• 2009

• Railway Journal
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• v.12 no.1
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• pp.26-30
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• 2009

• Journal of the Korean Society for Railway
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• v.8 no.2
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• pp.41-49
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• 2005

• Railway Journal
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• v.19 no.5
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• pp.54-67
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• 2016

• Railway Journal
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• v.18 no.3
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• pp.39-41
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• 2015

• Railway Journal
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• v.12 no.2
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• pp.64-68
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• 2009

• Communications of the Korean Institute of Information Scientists and Engineers
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• v.31 no.5
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• pp.46-55
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• 2013

• Magazine of korean Tunnelling and Underground Space Association
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• v.3 no.2
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• pp.63-67
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• 2001

최근 구조물의 안전과 관련하여 계측기술에 대한 관심이 고조되고 있으며, 시공중 계측 뿐 아니라 시공후 유지관리를 위한 구조물의 계측 사례가 증대되고 있다. 본 고에서는 영구계측을 위하여 고속철도용 터널에 적용된 유지관리 계측시스템을 소개함으로써 추후 터널의 유지관리 계측시스템을 구축하는데에 기초적인 자료를 제시하고자한다.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.24 no.8
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• pp.48-54
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• 2010

The AC electrified railway systems have the power quality problems such as the harmonic distortion, the reactive power and the three-phase imbalance because of the electrical load characteristics of locomotives, which are non-linear single-phase. These power quality problems have a bad effect on not only AC electrified railway systems but also other electric systems connected together. The RPQC (railway power quality conditioner) can compensate such power quality problems in the AC electrified railway systems. In this paper, a novel RPQC control method based on SRF (synchronous-reference-frame) control is proposed. The proposed RPQC control method can compensate effectively the harmonic currents, the reactive power and the load imbalance. The validity and the effectiveness of the proposed RPQC control method are illustrated through the simulations.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.23 no.3
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• pp.207-213
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• 2023

The control center of an urban railway operator provides railway users with various information on railway use through a 1:N same-time broadcasting system. However, the facilities of the broadcasting system are aging, exposing many limitations in meeting the needs of urban railway users who have become familiar with mobile services. To overcome these challenges, this study analyzed the mobile-based same-time broadcasting services using location information of urban railway users and the requirements of various stakeholders (urban railway users, an operator, and external service providers, etc.) to suggest optimal service models and physical structures. Through this study, it aims to secure safer operations of urban railway as well as to improve better disaster responses through rapid and efficient spread of the situation in case of disaster.