• 전기학회논문지
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• 제63권2호
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• pp.325-330
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• 2014

In order to operate trains both mainline railroad platform and metropolitan subway line platform, it is necessary to develop the door step equipment of the rolling stock regardless of low(500mm, mainline) and high level platforms(1,135mm, metropolitan subway line) because of the requisite door safety system. In this study, TMS-DCU interface is studied for low and high level railway platforms. As a result, Design circuit of TMS(Train Management System)-DCU(Door Control Unit) interface is suitable for telescopic sliding type doorstep unit to minimize damage to the carbody underframe of railway vehicles.

• 한국안전학회지
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• 제30권6호
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• pp.18-25
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• 2015

Computational study of a gravity current prior to the backdraft was conducted using fire dynamic simulator (FDS). Various initial conditions of mixture compositions and compartment temperature as well as four opening geometries (Horizontal, Door, Vertical, and Full opening) were considered to figure out their effects on the gravity current. The density difference ratio (${\beta}$) between inside and outside of compartment, the gravity current time ($t_{grav}$) and velocity ($v_{grav}$), and non-dimensional velocity ($v^*$) were introduced to quantify the flow characteristics of the gravity current. Overall fluid structure of the gravity current at the fixed opening geometry showed similar development process for different ${\beta}$ conditions. However, $t_{grav}$ for entering air to reach the opposed wall to the opening geometry increased with ${\beta}$. Door, Vertical, and Horizontal openings where openings are attached on the ground showed similar development process of the gravity current except for Horizontal opening, which located on the middle of the opening wall. The magnitude of $v_{grav}$ at fixed ${\beta}$ was, from largest to smallest, Full > Vertical > Door > Horizontal, but it depended on both the size and location of the opening. On the other hand, $v^*$ was found to be independent to ${\beta}$, and only depended on the geometry of the opening.

• 한국화재소방학회논문지
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• 제27권2호
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• pp.46-53
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• 2013

건축의 환경이 변하면 그에 따른 설계기준도 변하여야 한다. 방화문의 시험기준이 2005년 7월 27일 차연성 시험이 적용되면서 문틈이 기밀한 구조로 바뀌었다. 그러나 국가화재안전기준은 영국의 자료를 인용한 과거의 문틈규정을 적용함으로서 현실과 설계 규정의 차이가 오차나 안전율 이상으로 과도하다. 설계와 현실의 차이로 인하여 발생하는 결과 및 현상을 분석하고 개정되어야 할 국가화재안전기준의 누설틈새면적 계산법을 제시하고 연돌효과로 인한 방연풍속의 차이를 분석하였으며 생활패턴 및 피난패턴을 반영한 공동주택의 방연풍속 측정법에 대해 고찰하고 합리적인 측정법을 제시하였다.

• International Journal of Human Ecology
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• 제8권2호
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• pp.29-46
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• 2007

The purpose of this study was to analyze characteristics of the bedroom environment of nursing homes for the elderly in Korea. Field case research was performed using a structured checklist and measurements, from Oct. 28th to Dec. 2nd, 2006. Collected data were analyzed for cognitive efficiency, privacy, safety, supportiveness and amenity. Based on nursing homes for the elderly nationwide (Ministry of Health and Welfare, 2006), we choose 43 facilities in which Seoul and six megalopolis areas that had answered our questionnaire in 2006. We then narrowed the list to 14 facilities, balanced them in terms of regional population. The contents of investigation consisted of eight categories: that general characteristics of the bedrooms (including number of residents per room, using a bed or floor mat, the size and shape of the chamber, space for wheelchair turning, signage), door of bedroom (including door, doorknob, door sill/level difference), windows in the bedroom(including type of window, window sill height, window treatment, window safety device/shape, view/daylight), furniture (including personal furniture and lock), finishes (material, character and color of wall, floor, ceiling), lighting (including types of lighting, night lighting, switch), bathroom in the bedroom (including signage, door size/type, doorknob shape, height of the washbowl, size of toilet bowl, handrail, finishes), and other facilities (including outlet and handrails).

• 대한안전경영과학회지
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• 제12권1호
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• pp.113-118
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• 2010

"Domestic delivery service" is defined the service to deliver goods or packages from point of senders to point of receiver. With the characteristics of door to door, it is must a service provider should know the exact location of destination assuring best utilization of moving path. Generally, location information consist of postal code and address only, which result in difficulties to identify the precise location of destination. It is relatively less correlated between the information that address refers and practical location in Korea address system. For example, the next door to house number 100 is not always house number 101. Therefore, a delivery man additionally uses a paper map or a GPS navigation which carry extra job to input every code of location to the device in order to know precise location. It is also very inconvenient that every delivery man identify the location that address information refers and make a personal decision of the optimum moving path dropping each destination without calculating provisioning process of whole delivery path. As explained above, it is inefficient to find information delivery service required and to generate the optimum path. In results, these difficulties bring in delay of service and increase of cost. In this point, the contents of the thesis suggest a GPS navigation system easy to obtain accuracy of delivery information which enables to automate optimum moving path based on RFID which contains location information.

• 한국산학기술학회논문지
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• 제17권2호
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• pp.164-170
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• 2016

초기 도시철도는 수송수단으로서의 역할만 요구되었으나 지하 승강장에 체류하는 시간이 길어짐에 따라 하나의 생활 공간으로 환경개선이라는 문제에 직면하게 되었다. 이에 따라 스크린 도어의 근간이 되는 슬라이딩 자동문은 고객의 편의와 출입을 통제하는 방법의 편리성을 이유로 대형 유통매장, 병원, 음식점, 관공서 등에 광범위하게 사용되고 있다. 이에 따라 스크린 도어는 승객의 편의와 안전 확보, 쾌적한 역사 조성 및 에너지 절약을 목적으로 필요할 뿐만 아니라, 요소부품의 설계 및 신뢰성 확보를 통한 스크린 도어 시스템 최적설계기술개발이 필요하게 되었다. 따라서 본 논문에서는 지하철 안전에 필요한 스크린 도어의 모터에 대한 설계 구동 강성을 검증하기 위해 구성 부품의 이론적 하중을 계산하고 해석 하였으며, 실험을 통해 검증하였다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2010년도 춘계학술대회 논문집
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• pp.857-865
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• 2010

Recently the demand of the driverless rolling stock is increasing with advancement of the stable communication technique and control technique. The automatic train operating system has advantages which takes low operating cost and is able to dispose elastically in demand. Beside it provides high safety and effectiveness because it will be able to control power, signal and communication system from Operation Control Center and the safety and effectiveness are high. The establishment of PSD, Platform Screen Door, is advanced in the goal which is passenger safety, fire protection, noise and dust reduction etc. When but, two advanced systems also have risks of operation delay and accident when two systems are not controlled smoothly. Thus, I'll introduce control method between onboard controller, door control unit in rolling stock and PSD controller to help system design.

• 한국실내디자인학회:학술대회논문집
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• 한국실내디자인학회 2008년도 춘계학술발표대회 논문집
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• pp.242-246
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• 2008

This study is to research on the condition of safe environment of kindergartens. This study is to supplement the preceding study which was based only on survey to show the result and analyze the condition and problems of the safety of kindergartens to suggest the basic database of indoor environment that cause accident. First as a theoretical study, we analyze the preceding studies according to the related regulations. And we made checklist based on this and visited and investigated two kindergartens where applied for the case study As the result, we could understand factors that can cause accidents from classroom, corridor, door, stairs, balustrade, toilet, kitchen, front door, and fire exit/shelter. Especially, in case of fire exit/shelter, the whole renewal of kindergarten was necessary which is difficult. But, though it can not be advanced right away, they should try to have facility expansion and repair works gradually. And for more study on this, active cooperation from kindergartens are in need.

• 대한교통학회지
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• 제32권5호
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• pp.462-472
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• 2014

RPSD는 기존 PSD의 설치 운영 효율성 및 철도 이용자 안전관리 제고를 위해 개발되어 대구도시철도 2호선 문양역에서 2013년 3월부터 시범적으로 운영되어 왔다. 본 연구는 RPSD의 운영 시 비정상적인 상황에 관한 장애보고서와 로그파일을 이용하여 장애발생 내역의 분석 및 시범사업동안의 RPSD 기술 안전성에 대한 신뢰성 평가를 실시하였다. 또한 철도 이용자의 안전시설에 대한 인식과 주관적 감성을 반영하기 위해 RPSD 이용자의 감성평가 결과를 분석하여 요약하였다. 이러한 시스템 신뢰성과 감성평가를 기반으로 RPSD 시스템의 기술 안전성과 구조물 디자인 등에 대한 대중의 만족도 조사를 실시하여 기능 및 감성설계 개선점을 제시하였다.

• 한국구조물진단유지관리공학회 논문집
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• 제28권4호
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• pp.28-36
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• 2024

이 연구에서는 일반적인 도로터널의 피난안전성을 평가하기 위한 해석적 연구를 수행하였다. Fire Dynamics Simulator(FDS)를 활용하여 화재 크기를 변수로 화재시뮬레이션을 수행하였으며, 도로터널의 피난허용시간을 도출하였다. 또한, Pathfinder를 활용하여 피난연결 통로의 간격과 차단문의 폭을 고려한 피난시뮬레이션을 수행하고, 피난요구시간을 산정하였다. 피난허용시간과 피난요구시간을 비교하여 화재 크기, 피난연결통로의 간격, 차단문의 폭에 따른 도로터널의 피난안전성을 평가하였다. 화재 및 피난 시뮬레이션 결과에 따르면 화재 크기와 피난연결통로의 간격이 증가하고 차단문의 폭이 감소할수록 사상자의 수가 증가하였으며, 차단문의 폭이 1.2 m 이상으로 증가하면 피난연결통로 간격이 증가함에 따라 사상자의 수가 감소하였다.