• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 정기총회 및 추계학술대회 논문집
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• pp.1289-1297
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• 2011

Objective of this study was to characterize $PM_{10}$ sources on subway tunnels and development of simple particulate matters measuring device based on wireless sensor network. A new wireless sensor module, PMX, has been designed and manufactured to measure $PM_{10}$ and$PM_{2.5}$ simultaneously. The measurements have been conducted at a specific subway station on the Seoul metro line. The accuracy of the device was verified and compared with commercial measuring device based on weighting method.

• 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.

• 한국실내디자인학회:학술대회논문집
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• 한국실내디자인학회 2005년도 춘계학술발표대회 논문집
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• pp.46-50
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• 2005

In the contemporary city, which is an information-oriented society, human is evolving for responding to the various situation. Because the city has changed into the multi-layered network system, which is different from the paths in the past, the paths in the city have become the usual space of life. The active programmed space which is corresponding to citizen's spontaneous activities should be reflected in the path of city However, the current subway station, which is the main path of the city, is not equipped with the elements responding to the various possibilities of citizens. So this study suggests the programmed station as the extended space of citizen's daily lives.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 추계학술대회 논문집
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• pp.645-656
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• 2008

The operation of express train on the Seoul Metropolitan Subway Network is centered on the Kyungbu and Kyungin lines and the short section between Dongducheon station and Ganyung station which is 20.7km long. It is true that the needs of many customers who want to reduce their commuting hours by express train is not satisfied. This paper proposes that the operation of express trains be enlarged to Sungbuk station on Kyungwon line which comes to 34.9 km long, and to Yangsu station from Youngsan station on Jungang line. The type of operation is mixed one with high and low speed trains, which operates express train by use of existing siding tracks without improving facilities such as extra building of sidings. This pragmatic study is to apply the goal of reducing running time as express train and to suggest the selection of appropriate stops, effectivenes analysis of express train operation and formation of train diagrams to actual operation.

• 한국산학기술학회논문지
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• 제16권12호
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• pp.8608-8615
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• 2015

터널에 온도, 습도, 풍향, 풍속 등의 환경 데이터를 실시간으로 측정하여 전송 및 화재감지기의 경년시험 등을 수행할 수 있는 시스템을 개발하였다. 개발된 터널 환경측정 시스템은 철도터널 중 금정터널, 솔안터널 및 서울지하철 4호선 터널 등 국내 3개의 대표 터널 현장에 설치가 되어 약 1년 이상 터널환경이 측정되었으며 안정적으로 운용되었다. 또한 서울지하철 4호선 과천선 본선터널에 설치된 2기의 개발된 터널 환경 측정시스템으로부터 측정된 결과를 분석하였다. 개발된 터널 환경측정 시스템은 무선 통신망을 이용하여 터널 환경을 24시간 연속으로 안전적으로 분석가능하며 터널뿐만 아니라 여러 분야에 활용이 가능할 것이다.

• 한국위성정보통신학회논문지
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• 제8권2호
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• pp.22-28
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• 2013

In this paper, new LBS (location based service) are proposed using conventional DMB (digital multimedia/mobile broadcasting) system. LBS applications are proposed that can be suitable for the subway and ground transportation based on S-DMB (satellite-DMB) and T-DMB (terrestrial-DMB) respectively. In the shaded area such as subway, the broadcasting signal transmitted from the satellite of S-DMB system should be retransmitted by the earth repeater called the gap filler and each gap filler has its own identification value called the gap filler ID which introduces the area in which the gap filler was installed. Therefore, the LBS can be implemented by using the gap filler ID of S-DMB on the subway in which the GPS (global positioning system) can't be received. Unlike the LBS on the subway, the combination of T-DMB and DGPS (differential GPS) will be introduced as a way for ground transportation. Generally, DGPS has been designed to compensate the position value calculated from the GPS signal so that positioning error of about 1 meter can be obtained by using DGPS information. T-DMB system transmitting DGPS signal will be expected to be commercial in Korea and, if using DGPS information transmitted through T-DMB network, LBS with more precise positioning than GPS alone can be implemented in the ground vehicles.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2006년도 춘계학술대회 논문집
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• pp.7-10
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• 2006

• 한국산학기술학회논문지
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• 제11권12호
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• pp.5191-5198
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• 2010

지하철 이용수요와 토지이용, 개발밀도, 환승교통체계, 접근성과 같은 다양한 역세권 특성의 관계를 규명하기 위한 많은 연구들이 추진되어 왔으나, 역세권내 보행 가로망 구조와 지하철 이용수요간의 관계에 관한 분석은 미비한 실정이다. 본 연구는 부산광역시 79개 지하철 역세권내 가로망의 구조를 공간구문론(Space syntax)을 이용하여 평가하였으며, 역세권내 가로망 구조의 접근성을 포함한 다양한 역세권 특성이 지하철 이용수요에 미치는 영향을 실증분석을 하였다. 분석결과 역세권 가로망 구조를 대변할 수 있는 공간지표인 통합도, 연결도, 명료도 중 역세권 가로망의 접근 편의성을 나타내는 통합도가 높을수록 지하철 이용수요가 증가하는 것으로 나타났다. 또한 역세권 토지이용형태와 개발밀도를 각각 반영하는 집객시설 집중도와 용적률이 높을수록 지하철 이용수요가 증가하는 것으로 나타났다. 따라서 부산광역시의 지하철 역세권 구조를 대중교통 중심의 개발 체계로 개선하기 위해서는 역세권내 보행가로의 접근성을 향상시킬 수 있는 가로 설계와 통행 목적성이 강한 도시시설물을 압축 고밀의 건축물에 조성하기 위한 노력들이 추진되어야 할 것으로 판단된다.

• 한국방재안전학회논문집
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• 제9권1호
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• pp.19-24
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• 2016

본 연구에서는 사물인터넷 기반 재난 대응 시스템 개발에 관한 연구를 수행하였다. 센서 네트워크와 키퍼라고 하는 클라이언트 머신을 이용해서 네트워크 기반의 방재 시스템을 구축하는 방법에 대해서 연구하였으며, 또한 최적 피난을 위해서 신장 트리 기반의 피난 유도 알고리즘을 개발하여서 피난에 적용하였다. 개발 시스템은 실제 서울 개포동역에 테스트베드로 설치하여 검증을 하였으며, 실제로 지하철 안전을 위해서 유용한 시스템임을 확인할 수 있었다.