• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2001년도 춘계학술대회논문집
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• pp.1034-1039
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• 2001

Recently. development of a subway as a public transport has been increased rapidly. Therefore, large noise, which induced from vehicle itself as well as frictions between rails and train, may inflict a considerable damage to the adjacent structure and cause discomfort to neighboring residents. Nevertheless, adequate design guidelines to reduce outdoor noise are not yet established. The present work carried out a survey on the influence of outdoor subway noise using questionnaires. Also or noise measurements levels in those are as were performed.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2004년도 추계학술대회 논문집
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• pp.1174-1179
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• 2004

In general, the national rail system put an emphasis on distribution planing of stations for smooth operation of transporting goods, train allocation, parking, and maintenance. Since the national rail system is operated on the ground level, it is feasible to improve various aspects of the system during its operation. On the contrary, urban rail system is operated in the limited space under the ground, and thus, improving various aspects of the system during its operation is infeasible. Specifically, the urban subway system must have a comprehensive track distribution plan because the urban subway system has to operate in a limited environment such as it operates in a much shorter time period, The subway system has to be ready for various operations and events such as trains returning in the opposite direction. parking trains that need repair, parking during night time, storing various maintenance equipments, and connections to other tracks. Furthermore, considering the future extension of tracks, a comprehensive track distribution plan is a must.

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2007년도 동계학술발표대회 논문집
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• pp.270-275
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• 2007

Pollutants emitted by Diesel trains seriously affected on the ventilation characteristics in the subway or railway tunnel network systems. Thus, numerical prediction results and analyses are required to engineers who should design ventilation facilities. So here, this paper presents some numerical results about the ventilation characteristics, such as pollutants distributions and a suitability of the ventilation facilities pre-designed in case that diesel trains use the same railway track with normal passenger trains

• 한국철도학회논문집
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• 제8권6호
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• pp.559-565
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• 2005

In this paper, we propose a stereoscopic video coding scheme for subway accident monitoring system. The proposed designed for providing flexible video among various displays, such ass control center, station employees and train driver. We uses MPEG-2 standard for coding the left-view sequence and IBMDC coding scheme predicts matching block by interpolating both motion and disparity predicted macroblocks. To provide efficient stereoscopic video service, we define both temporally and spatially scalable layers for each eye's-view by using the concept of Spatio-Temporal scalability. The experimental results show the efficiency of proposed coding scheme by comparison with already known methods and the advantages of disparity estimation in terms of scalability overhead. According to the experimental results, we expect the proposed functionalities will play a key role in establishing highly flexible stereoscopic video codec for ubiquitous display environment where devices and network connections are heterogeneous.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 추계학술대회 논문집
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• pp.352-357
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• 2008

Using the artificial sun, namely the BIOSUN, we can control the sun light according to the latitude and longitude and for the seasonal changes and apply that to subway stations. By doing this, we can expect three effects, a. allowing the plants to grow inside the stations which will in turn contribute to improving air purity, controlling humidity, and reducing dust for pleasant environment, b. pleasant environment will foster positive emotional responses of the passengers and that would increase the satisfaction, and c. fostering good service for the citizenry and establishing an environmental friendly image of the Seoul Metro Subway System. The purpose of this thesis paper is to contemplate on the uses of the artificial sun powered by the microprocessor of a Light Emitting Diode (LED) in controlling the light and how the light can be utilized in facilitating photosynthesis that would allow plants to grow inside subway stations.

• 대한안전경영과학회지
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• 제16권4호
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• pp.91-99
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• 2014

This study highlights the theme of human error of train drivers, conducting empirical analysis on the relationship between organizational culture, safety climates, safety behavior, and accident. The empirical test results based on questionnaires received from 223 train drivers working at A subway firm indicated that relationship conflict and psychological reward as the elements of organizational culture variables showed a significant positive effect on CEO philosophy, communication, and boss's leadership. And only boss's leadership showed a positive influence on safety behavior, which in turn showed a significant negative relationship with accidents.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2006년도 추계학술대회 논문집
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• pp.1210-1213
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• 2006

Indoor air quality is an important determinant of human health and comfort. However, the complexity of pollution sources and the multitude of parties responsible for creating indoor exposures makes the improvement of air quality difficult. The KTX HVAC(Heating, Ventilating and Air-Conditioning) system is important facility to provide comfortable environment passenger service. The Ministry of Environment is planning to enforce$\square\square$Indoor Air Quality Management law in Public Facilities$\square\square$in year 2008. Hereupon, the train and the subway are included. In this research air quality in the KTX Train compartment has measured. As a result, The average amounts of PM10(particulate matters), $CO_2$(carbon dioxide)measured $20{\mu}g/m^3$, 1,097ppm in KTX respectively. There are compare to regulation the value is 10% for PM10 and 43% for $CO_2$. Thus, the indoor air quality of KTX train have been proved satisfy the recommendation the Ministry of Environment guidelines.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2010년도 춘계학술대회 논문집
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• pp.1352-1359
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• 2010

It is said that the number of people using public transportation has risen about 220 thousand over 3 years which was 1019 people average a day in 2006 and 1041 people last year. It is also said that the number of people using subway has increased by 198 thousand and the number of people using bus by 22 thousand. Can you imagine how many door engines work at the same time if we count Metro line no.1 to no.4 which consist of total 120 subway stations? A train has 80 door engines and Metro line trains have 9600 door engines all together. Which explains it quite simple how much Satefy, Durability and Sustainability need to be focused in Door Engines. Although it's not the whole part of door engines in Seoul Metro Line, And Metro No.4's door engines are operated by the method called mixture of mechanical type and belt type. And the last one is being used in the brand-new Metro train line No.3 which is being operated by electricity motor, instead of the old methods which use air pressure to operate a door engine. I'm sure you will agree that Safety is the first priority of Metro train and next follow comfortability and quickness. I think all I've talked so far make it the first step for the Safety of Metro train for you to understand the unit of a Door Engine.

• 한국철도학회논문집
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• 제14권6호
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• pp.507-514
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• 2011

최근 국내 협력 업체와 함께 국산 전동차를 제작하였다. 전동차에서 주 제어장치는 열차종합제어장치인 TCMS로서 시스템 성능, 편리한 유지 관리 그리고 서비스 관점의 유연성을 고려하면서 TCMS의 요구분석을 수행하였다. 이를 기반으로 새로운 내부 버스 구조와 RTOS로서 QNX를 적용하게 되었다. TCMS 기능을 서비스 장치와 제어/감시 기능으로 분리하여 열차의 성능 개선과 편리한 유지 보수 그리고 고객 요구를 만족하였다. TCMS는 하드웨어에 구현된 다양한 프로토콜을 통하여 열차에 장착된 제어 장치를 제어하고 관리한다. 시스템의 성능 검증과 안정성을 확인하기 위하여 EMC/EMI를 비롯한 다양한 시험을 KOLAS 인증 기관과 한국철도기술연구원에서 시행하였다. 현재 TCMS는 새로 개발된 열차에 장착되어서 시운전을 통하여 성능 검증을 수행하고 있다.

• 한국철도학회논문집
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• 제10권1호
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• pp.57-66
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• 2007

1974. 8. 15 SeoulMetro, beginning with the first electric railway established at six cities, so it is managing mass transportation of traffic. Especially, in case of seoul, It is managing that from one to eight lines, 286.9km, 265 stations have installed and now it is carrying about 5.5million of passengers everyday, and 2,000million passengers a year. So accident is increasing from the station every year. For this measure, SeoulMetro prepares safety fence for passengers crash but, as suicides or people who watch the accident took place, for at the bottom of passengers crash protection, PSD installing is needed. Even though, PSD is managing ATO section but, in controlling SeoulMetro, one to four lines sections are (ATS, ATC)section. Between as ATS, ATC section, ATO section, subway gate and PSD must have opened and crossed always at the time. And the interlock control corrosion protection gate, managing skills with installation, method, using in history, apply to 10rail cars one train sets, and maximum applying 2224% sections of passengers congested that consideration is to be needed. So 2004, SeoulMetro improved technology and basie design of PSD at ATS section. Based on this, from 2005.4 to 2006.6, using subway 2lines per 12stations set the model installation(full type 11stations, half type 1station) After installing in case of success, it is going about to suggest that effective analysis and hereafter subject.