In this study, ELF-MF levels of subway trains were measured to understand the status of the intensity of ELFMF. The measurement points for the train are selected in the center of each train compartment(pantagraph compartment, motor-driven compartment and the compartment that is not connected to any other electric equipment) using EMDEX II. ELF-MF levels of trains were measured from the starting to the terminal station in each lines(Seoul line 1-9, Incheon line 1, Incheon international airport line, Gyungui line, Bundang line, Gyeongchun line, Joongang line, Suin line). We found that the mean and range of ELF-MF levels in the DC power subway train are 2.4 and 0.1~125.9 mG, respectively, while the mean and range of ELF-MF levels in the AC power subway train are 10.4and 0.0~156.3 mG, respectively. Furthermore, the maximum ELF-MF level(156.3 mG) was lower than the reference level(ICNIRP 833 mG, 60Hz). The findings of this study in relation to the characteristics of ELF-MF for subway will be useful to derive the ELF-MF exposure coefficient from our living environment in a subsequent study.

This study was conducted to analyze dust mite allergen and bacterial endotoxin concentrations in the subwaycabins. For this aim, we sampled dust using a vacuum cleaner on cabin seats of subway trains operating in threeSeoul Metro Lines from April to May in 2011. The concentration of dust mite allergen and endotoxin were1,137.51±806.26ng/g and 5,742.1(4.68)EU/g, respectively. While, the concentration of dust mite allergen washigher on cabin seats of subway trains in Line B(1,487.61±930.59ng/g) than on those of trains in Lines A andC(641.9±398.3 and 1,344.9±822.4ng/g). All measurements did not exceed the National Workshop Guidelineof 2,000ng/g. While, bacterial endotoxin concentration [GM (GSD)] was higher on cabin seats of subway trainsin Line A [12,373.21(4.97EU/g)] than on those of trains in Line B and C8,520.77(3.98) and 1,631.43(1.88)EU/g. Dust mite allergen concentrations were strongly influenced by the portion of underground (on the subway line)and endotoxin concentrations were significantly correlated with the number of passengers using the subway lines.Seats for seniors and the week showed relatively higher concentrations compared to seats for general passengers.But, no significant difference of dust mite allergen and endotoxin concentrations in the subway cabins was foundrelating to seat type (p=0.451, p=0.564). There was no correlation between the dust mite allergen levels andendotoxin levels in the subway cabins (p=0.439).

This study highlights the theme of human error of train drivers, conducting empirical analysis on the relationship between emergency stress, psychological fatigue, safety behavior, and accident. The hypothetical test results based on questionnaires received from 223 train drivers working at A subway firm indicate that emergency stress shows a significant positive effect on psychological fatigue, which in turn shows a significant negative influence on safety behavior. And safety behavior is shown having a significant negative relationship with accident. These results suggest the necessity of corporate-level approaches to depict the drastic causes of drivers’ emergency stress, and to effectively manage this stress, as well as the necessity of making effort to enhance safety behavior, and to prevent or reduce accidents.

본 논문에서는 페러데이 법칙을 이용한 진동발전 장치를 지하철의 자갈도상과 콘크리트 도상의 분류에 따른 기전력 량을 분석 하였다. 지하철 2호선 서초～방배 구간의 자갈도상에서 콘크리트 도상 변경으로 동일한 전동차 운행속도로 동일 구간에서 차량운행에 의한 동특성을 분석하고 진동력발전 장치를 이용해 얻어질 수 있는 기전력 량을 분석하였다. 또한 페러데이의 법칙에 의한 유도 기전력 식에 의한 계산 기전력 량과 발전 장치에 의한 관측 기전력 량을 베이지안 회귀 분석 및 상관분석을 통하여 철도에 적용되는 모델에 대한 신뢰구간과 모델식을 각 도상별로 업데이팅하였다. 수정된 식을 이용한 기전력은 한 개의 진동발전 장치 당 콘크리트 도상에서 4mV, 자갈도상에서는 40mV의 전력을 얻을 수 있다.

In order to meet the national standard and public needs for Seoul Metro subway, air purification has been taken into a consistent consideration with the addition of high quality control facilities. This work focuses on the review of the cost effectiveness to improve the air filtration of an MVAC (mechanical ventilation & air conditioning) in a field subway. The inflow PM₁₀ and PM_2.5 into the test MVAC chamber were 19.4 kg/yr and 8.9 kg/yr respectively. It corresponds to the environmental cost of 5,857,000 won for PM₁₀ and 6,608,000 won for PM_2.5 every year. While the current filtration system collects approximately 55% of the inlet PM₁₀ and 35% of PM_2.5, a new lay-out showed 80% for PM₁₀ and 55% for PM_2.5. The new design presented the environmental benefit for PM10 with 1,464,000 won, whilst the additional cost required 3,192,744 won. In the future, however, the increase of environmental benefits for the indoor dust over the atmospheric aerosols will more or less compensate the potential cost.

The efforts to reduce industrial accident has been brisk recently in workplace. These efforts were mainly concentrated on construction and manufacturing. Despite these efforts, current accident rate so far has been maintained on the fixed level. According to the change of industrial structure, the government's attention on industrial accident prevention activities are focused in service industries. When trying to appraise the result of such activities, it is impossible to evaluate safety without certain criteria. Therefore, we analyze data by TOPSIS method that all the subway institution jointly manage every year. we decide the order of safety priority between domestic subway workplaces and measure the variation in safety by sensitivity. As a result, we draw conclusions to improve safety for the primary consideration and suggest alternatives.

광섬유의 클래딩 부분을 별도의 고정구에 직접 부착하는 방식으로 고정하여, 변형발생 시 광케이블을 구성하는 재료들 사이에서 발생하는 미끄러짐(Slip)현상을 방지하고, 외력에 의해 발생하는 변형을 정확하게 측정이 가능하도록 함과 기존 광섬유격자센서가 자체적으로 압축변형의 측정이 곤란한 점을 개선하기 위해 미리 긴장(Pre-Strain)상태를 유지하기 위하여 두 개의 접점사이를 볼트와 너트로 조절하여 프리스트레인 가변이 가능하도록 하여 인장/압축변형 측정을 가능하게 한 광섬유격자센서 패키지를 사용하는 지하구조물 변위 모니터링시스템이 본 연구에 의해 개발되었다. 이러한 광섬유격자센서 패키지는 콘크리트 라이닝구조물에 콘크리트의 불균일성을 극복하고 대표성을 가지기 위해 1미터 게이지 길이를 갖도록 하여 모니터링시스템에 적용되었으며, 대구 지하철 지하구조물에 현재 운영 중인 이 시스템은 한국전력 공동구 설치공사가 진행되면서 구조물에 미치는 영향을 판단하기 위한 모니터링시스템으로 적용되었다.

Many people transfer from the automobile to the subway because of increasing in oil price and improvement of mass transit system of Seoul Metropolitan City. But Seoul Metropolitan Subway have brought out passengers discomfort because it is more crowded over the appropriateness because of very high utilization though it is highly technically facilitated. This study deals with the development and simulation study of subway train simulator. We performed the validity simulation study for the simulator for the interval from Sindorim station to Samsung station in Seoul Subway Line 2. We analyzed the simulation results considering crowdedness after we defined the concept of crowdedness. Also we accomplished the analysis of simulation results after simulation under the assumption that the crowdedness is alleviated by controlling the passengers using RFID technology.

Many people transfer from the automobile to the subway because of increasing in oil price and improvement of mass transit system of Seoul Metropolitan City. But Seoul Metropolitan Subway have brought out passengers discomfort because it is more crowded over the appropriateness because of very high utilization though it is highly technically facilitated. This study deals with the development and simulation study of subway train simulator. We analyzed the simulation results considering crowdedness after we defined the concept of crowdedness.

According to the measurements at Seoul Metro subway, the sound level at the time of subway arrival ranged from 77.0 to 92.5 dB(A). The highest level was 92.5 dB(A) at Line-1, and the lowest level was 77.0 dB(A) at Line-5. The sound level of departure ranged from the lowest level of 82.9 dB(A) at Line-5 and the highest level of 95 dB(A) at Line-1. The indoor sound level at subway ranged from the lowest level of 87.2 dB(A) (Line-6) to the highest value of 92.1 dB(A) (Line-1). The results of this study also showed that the sound level at subway platform with Platform Screen Door(PSD) showed 81.8 dB(A) but 89.1 dB(A) without PSD. The sound reduction effect of PSD showed 7.3 dB(A) at platform. Consequently, the sound level in Korean subway was found to exceed the standard set for the American Public Transportation Association (85dB(A)).

교통진동의 영향을 받는 중층건물의 진동특성에 관한 논문이다. 현장진동계측은 진동원과 진동감소대책을 위하여 실시되었다. 시간영역 진동데이터는 버스와 지하철로 인한 건물에 전달된 진동 영향 등의 진동특성을 위하여 이용되었다. 진동대책을 통한 진동감소의 효과 역시 입증할 수 있었다.

This study was performed to investigate the concentration levels of CO2 and the associated parameters in the subway from lines 1 to 8 in Seoul metropolitan area, during 1 to 30 Sept. 2005. CO2 concentration was measured at the entrance and center in subway passenger cabin by non-dispersive infrared analyser. The associated parameters for CO2 were estimated based on the number of passenger, open and closed doors etc. The mean CO2 concentrations were measured to be 1,646±712 ppm in subway passenger cabins. The CO2 concentrations showed the highest values between 7 and 9 AM in rush hour(p〈0.01). The correlation coefficient between CO2 and the number of passenger was highly significant(r=0.824). The general linear model indicated that subway line, subway location (ground and underground tract), and measurement point (enterance and center of cabins) and running time (morning and afternoon) significantly influenced the concentrations of CO2. An extended study is needed to examine the sources of CO2 in subway cabins and to compare pollutants concentration among subway lines.

지하철의 운행에 의한 소음과 진동은 운행로 주위의 주민을 괴롭히는 중요한 요소의 하나이다. 일반적인 건물의 진동은 횡방향의 진동을 많이 고려하고 있으나 지하철의 운행에 의한 건물의 진동은 수직방향의 진동을 주요하게 다루어야 한다. 수직방향의 진동을 고려하기 위한 구조물은 보의 진동이 고려된 모델이어야 한다. 따라서 구조물의 수평방향 진동을 고려하기 위하여 사용된 모델은 수직방향의 진동을 고려하기 위한 모델과 같이 사용될 수 없다. 건물의 수직진동을 고려한 해석을 수행하기 위해서는 보의 관성력을 충분히 고려할 수 있는 모델이 사용되어야 한다. 본 논문에서는 지하철의 운행에 의한 구조물의 수직방향진동을 고려하기 위한 구조물의 해석 모델기법에 대하여 연구한 결과 기둥의 경우 하나이상 보의 경우 두개 이상의 요소로 나누어 해석하는 것이 바람직한 것으로 나타났다.

This study was conducted to investigate the response of the human body to stress induced by wall recording of subway stations in the city center. The experiment was conducted as a simulation exercise, and six images were selected and produced based on Subway Line 2, a representative underground space in Seoul. The study participants included 24 male and female college students. A three-minute experiment was conducted, during which the participants were shown the control image and green wall image once each. To measure psychological status, the following measurement indicators were used: Semantic Differential, Positive Affect and Negative Affect Schedule and State-Trait Anxiety Inventory. Physiological changes were investigated by tracking participants’ heart rate and blood pressure. Results showed that parasympathetic and sympathetic nerves were activated in the presence of the green wall in the subway station. The psychological evaluation analysis revealed that negative affect toward underground space decreased, while positive affect increased. This study found that the green wall in subway stations has a stable effect on the human body, both psychologically and physiologically. In the future, green walls in underground spaces can be used to reduce psychological stress and increase physiological relaxation.

급변하는 IT 기술의 발전으로 스마트 디바이스의 도래는 다양한 미디어 환경의 영역을 확장 및 변화시켜, 사용자들의 삶에 한 부분으로 깊숙이 자리 잡았다. 특히 실시간 대중교통 정보 서비스 중 지하철 애플리케이션은 스마트 디바이스의 발전에 따라 이용 빈도의 수가 증가하고 있다. 서울시 하루 평균 13,381천명이 지하철과 버스를 이용한 것으로 집계 되었으며, 이중 지하철 이용자는 7,983천명이다. 교통과 지도 애플리케이션 중 대중교통 안에 포함되어 있는 지하철 애플리케이션은 우리 일상생활에 없어서는 안 될 가장 필요한 부분으로 자리 잡게 되었다. 이러한 스마트 디바이스 시대에 다양한 사용자들을 위해 지하철 애플리케이션이 개발이 되었지만 개발환경과 스마트 디바이스 환경이 다르기 때문에 인터페이스의 일관성이 부족하여 사용자의 기대에 부응하지 못하고 있다. 본 연구에서는 2018년 2월까지 구글 플레이(Google Play)와 애플의 앱 스토어(App Store) 두 곳에서 리뷰, 사용성 평가, 선호도 등의 정보들을 참고로 하여 지하철, 카카오지하철, 지하철종결자, 지하철타임, 지하철매니저 총 5개의 지하철 애플리케이션을 대상으로 사용성 평가에 관한 설문조사와 FGI를 실시하였다. 설문결과에서 지하철 애플리케이션이 효율성 및 만족성에서 가장 사용성 평가 점수가 높았으며, 그 다음으로 카카오지하철, 지하철종결자, 지하철매니저, 지하철타임으로 나타났다. 카카오지하철과, 지하철종결자는 일관성과 심미성에서 가장 높은 점수를 받았으나, 용이성에서는 낮은 점수를 받았다. 지하철 애플리케이션은 용이성과 일관성에서도 높은 점수로 도출되었다. 지하철 애플리케이션은 언제 어디서나 빠른 시간에 사용자에게 정확한 정보를 신속하게 전달해야한다. 이와 함께 다양한 디바이스에서 환경에 적합한 사용자 인터페이스를 통해 동적 정보에 충실해야 할 것이다.