• Journal of the Korea Institute of Information and Communication Engineering
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• v.20 no.7
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• pp.1335-1341
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• 2016

For the safety of train operation, monitoring & supervisory systems for train, signal, power, communication and facilities is operating independently in another place, so, its sensors are interdependently connected from each other to transfer gathering datas of sensing to control center. A Goal of Real-time railway safety supervision system is to improve the safety oversight efficiency and to prevent accidents by means of hazard prediction based on big data by integrating all of safety sensing data in wayside of railway, and the System is requested acquisition of all of sensing data of safety. So, we need special method of protocol converting for the purpose of integrating all of detecting data concerning safety without any changing application. In this paper we investigate the existing converting method in communication field, and propose a new progress to converting protocol adding function of transfer using XML file, and implemented this algorithm, and tested with example packets, finally.

• Journal of the Korea Society for Simulation
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• v.27 no.1
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• pp.119-126
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• 2018

This study intended to exploratively testify human error causing factors for railway traffic controller, using AMOS structural equation model. Through literature survey, fatigue and stress as exogenous variable, errors in information process such as cognitive, memory, storage, and execution error as endogenous variable, and accident and incident(near-miss) as dependent variable were set up. Results based on AMOS using 201 railway traffic controllers' questionnaire showed that a clear causality loop like as 'stress ${\rightarrow}$ memory error ${\rightarrow}$ storage error ${\rightarrow}$ incident(near-miss) ${\rightarrow}$ accident' is formed. This result suggests that for the purpose of mitigation of traffic controller's accident, it is so necessary to reduce memory and execution error in the information processing process based on the effective management of stress, as the precedent of them.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2010.10a
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• pp.149-151
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• 2010

최근 해양사고 및 해양오염사고로 인하여 해상교통관제 역할의 중요성이 재인되어 해상교통관제 역량강화의 필요성이 대두되었다. 해상교통관제 역량을 강화하기 위해서는 인적요소인 관제사의 업무역량 강화가 무엇보다 중요한 요소 중 하나이다. 따라서 이 연구에서는 해상교통관제와 유사한 업무를 수행하고 있는 항공 및 철도관제사 제도와 외국 선진 항만 관제사의 자격제도, 평가제도 및 교육제도를 분석하여 해상교통관제사의 실정에 적합한 제도개선 방안을 제시하고자 한다.

• Journal of the Korean Society for Railway
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• v.16 no.5
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• pp.430-438
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• 2013

An empirical study on railway controller and railway engineer who work in a domestic railway corporation was undertaken to verify the effects of emotional burnout and empowerment and organizational commitment on cooperation and safety behavior. The results of the analysis confirmed that the relations between emotional burnout, empowerment and organizational commitment as well as the relations between cooperation and safety behavior had negative effects. In contrast, the results of the analysis confirmed that empowerment and organizational commitment had positive effects on safety behavior and cooperation, and were effective because of all interactions among emotional burnout, safety behavior and cooperation. In conclusion this study convincingly demonstrates that emotional control, empowerment and organizational commitment of controller and engineer are important factors to secure safe operation of trains based on high safety behavior and cooperation behavior.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.20 no.4
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• pp.739-746
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• 2016

The real-time railway safety monitoring and control system is for prevention of safety accidents, and this system adopts DDS (Data Distribution Service) standard based data transmission method to support integrated management of data from existing on-site safety detection devices. In this paper, we introduce the design of DDS-based data specification from on-site signal equipment on the conventional railway. For this, we (1) design UML data model of KRS SG 0062 standard which defines existing data specification, (2) define DDS Topics for DDS transmission and map KRS model to DDS Topic model, (3) suggest data transformation rules and (4) design network control QoS polices. In addition, we analysis actual on-site log data and validate our data specification design. DDS-based data transmission enables data compatibility among on-site devices and the real-time railway safety monitoring and control system, and allows efficient network management for a large amount of data transfer.

• Journal of the Korean Society for Railway
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• v.17 no.2
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• pp.148-155
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• 2014

This practical study investigates the effects of job satisfaction as a result of the stresses felt by many dispatchers who work in the subway industry in the Seoul metropolitan area. Factors that cause stress are assessed. The organization system, inappropriate compensation, workplace culture, and job requirements, among several types of organizational stresses are significantly related to job satisfaction. The results of the analysis indicate that there is a close link between job satisfaction and dispatcher communication factors. This paper suggests stress-relief measures for dispatchers who must handle a variety of civil complaints and improper communications with field departments based on the analysis of the answers to descriptive questionnaire items.

• Proceedings of the Safety Management and Science Conference
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• 2013.11a
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• pp.321-327
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• 2013

기관사와 관제사는 일상적 교번근무의 제도적 틀과 사고 및 장애발생의 가능성을 늘 염려하면서 주어진 과업을 수행해나가고 있다. 최근 철도분야의 휴먼에러에 대한 사회적 관심이 높아지면서 휴먼에러 유발의 원인과 해소방안에 대한 연구관심도 더불어 증대되고 있다. 그 동안 기관사를 대상으로 한 연구가 주류를 이루고 있는 가운데 관제사에 대한 접근은 거의 이루어지지 않았다. 그러나 관제사 또한 안전업무종사자의 일원으로 이들의 과업수행은 휴먼에러와 깊은 관련성이 있다. 따라서 본 연구는 안전업무종사자인 기관사와 관제사의 휴먼에러 및 그 선행요인과 후행요인을 탐색적으로 밝히되 사회심리변인들의 상관관계분석 결과를 토대로 두 직종을 비교관점에서 접근함으로써 좀 더 의미있는 결과를 도출하는데 주력했다.

• Journal of The Korean Society For Urban Railway
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• v.6 no.4
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• pp.233-241
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• 2018

Recently, integrated railway safety monitoring and control system, which is a convergence system based on data distribution service for railway safety monitoring and control, is under development. It collects safety data of vehicle, signal, power and safety monitoring facilities in real time and adopts communication middleware based on distributed service for mass data processing. However, in the case of a server device used as an existing control server, the performance of the distributed service middleware can not be exhibited due to low hardware performance due to safety reasons. In the safety control system, 200,000 packets per second were set as the transmission target, but the performance test of the LAB was not satisfied. In this paper, we analyze the characteristics of railway data to improve the data collection performance of existing equipment and apply DDS-based streaming transmission method to the data model of signal facilities and vehicle facilities with large packet amount according to the analysis result. As a result, it was confirmed that the throughput was improved about 30.4 times when the hardware performance was the same. We plan to improve the data processing performance by applying it to real-time railway safety integrated monitoring and control system in the future.

• Journal of the Korean Society for Railway
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• v.20 no.4
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• pp.558-567
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• 2017

This study was conducted to analyze the turnover intentions of railway traffic controllers among employees of a domestic railway corporation. Variables influencing job turnover intention included exploited variables (empowerment, job stress, job satisfaction, organizational commitment, exhaustion) that have been actively studied in other fields. The results showed that the empowerment of railway traffic controllers did not directly affect job stress and turnover intention, but had a direct effect on job satisfaction, organizational commitment, and exhaustion. Job stress did not directly affect job satisfaction, organizational commitment, and exhaustion, and job satisfaction did not directly affect organizational commitment, burnout, and turnover intentions. Burnout has a direct effect on turnover intention, indicating that exhaustion of railroad traffic controllers has an effect on turnover intentions. In conclusion, empowerment has a direct effect on burnout and exhaustion has a direct effect on turnover intention. This study suggests that management of empowerment and exhaustion is important for the prevention of turnover of railway traffic controllers.

• Proceedings of the KSR Conference
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• 2008.11b
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• pp.1794-1798
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• 2008

Inside noise level of a running train in open field is the summation of air borne noise and structure-borne noise. Anti-roll bar is the major transmission path of vibration from bogie. And this vibration gives an effect to the structure borne noise. In this paper, the effect of anti-roll bar is investigated. Structure borne noise is analyzed in terms of changing the mounting position of anti-roll bar to reduce inside noise levels.