• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 정기총회 및 추계학술대회 논문집
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• pp.3046-3051
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• 2011

The third-rail system is an important device supplying power directly to the Maglev train through physical contact with the collecting shoe. It is directly related to safety and reliability for the running of Maglev. However, most the third-rail system used in Korea depend on foreign product or technologies, Korea Urban Maglev in the development of appropriate power feeding is urgent. In particular, the turnout section is the weakness point in the system because bending force by turnout section movement and fatigue caused by repetitive motion as well as the expansion by temperature, the forces by Maglev collecting shoe is added th the third-rail. Therefore, this paper proposes the third-rail system appropriate for Korean Urban Maglev of turnout section. To verify the structural stability of POSCO ICT third-rail system, the finite element analysis and physical testing was performed. The third-rail is fixed on each side of the turn-out section steel structure by epoxy insulation supporter and the integral behaviors are occurred. Therefore, the maximum horizontal displacements of each support are investigated and then, it is applied to finite element model of the third-rail to investigate the moments and stress. Also, the bending test about one million times and Expansion Joint for the third-rail was performed. The third-rail system safety and reliability was identified by test line on Korea Institute of Machinery & Materials in Deajeon for under the actual usage environment such as the Maglev and turn-out operation.

• 한국지리정보학회지
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• 제5권3호
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• pp.9-18
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• 2002

경관은 인간과 자연환경이 결합되어 시공간적으로 나타나는 토지 모자이크이며, 토지이용 및 지피(landcover)의 변화는 지역의 경관구조를 변화시키는 주요한 원인으로 인식되고 있다. 본 연구에서는 다양한 경관요소들이 존재하는 경산시를 대상으로 1985년과 1997년의 Landsat TM 영상을 통한 토지이용의 변화 및 경관지수를 사용하여 대상지역의 경관구조 변화에 대해 분석하고자 하였다. 본 연구의 결과를 요약하면 다음과 같다. 첫째, 도시화로 인해 산림 및 농경지가 도시지역으로 전용되고 있는 것으로 나타났다. 둘째, 산림지역에서 개발로 인한 훼손으로 파편화 현상이 발생하여 산림의 건전성이 감소하고 있음을 알 수 있으며, 농경지를 중심으로 도시지역의 확장이 이루어지고 있는 것으로 판단된다. 셋째, 산림지역 주변의 토지이용형태가 농경지 중심에서 도시지역과 농경지의 혼합된 형태로 변하고 있음을 알 수 있다.

• 한국지반신소재학회논문집
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• 제16권2호
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• pp.97-107
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• 2017

최근 도심지에서 지반함몰이 많이 발생하고 있으며 복구작업시 현장 주변 통제로 매우 복잡하고 불편하고 복구대책 공법으로 그라우팅 및 흙메우기 공법이 적용되고 있지만 지반 내 지하수위의 존재 및 공동상태에 따라 재료분리 현상이 발생하거나 많은 양의 복구재료가 요구되는 경우가 많고 지하수의 흐름에 따라 지반 내에서 유실되는 경우도 발생하고 있어 본 연구는 도심지에서 지반함몰이 발생하고 신속하게 복구하는 것을 목표로 지반공동의 긴급보강을 위해 비개착식 공법에 적용할 파우치형 충전재를 개발하는 것으로 지하수의 온도에 따라 충전재의 압축강도 및 팽창비가 다른 것과, 알루미나 파우더의 혼합을 통해 압축강도와 팽창률을 조절할 수 있음을 확인했다.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2002년도 Proceedings of International Symposium on Remote Sensing
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• pp.222-227
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• 2002

This research will examine into the capabilities of KOMPSAI-1 EOC image application in the field of urban environment and at the same time, with that as its foundation, come to understand the urban changes of the study areas. This research is constructed in three stages: Firstly, for application of change detection techniques, which utilizes multi-temporal remotely sensed data, the data normalization process is carried out. Secondly, change detection method is applied fur the systematic monitoring of land use changes, which utilizes multi-temporal EOC images. Lastly, by using the results of the application of land use changes, the existing land use map is updated. Consequently, the land-use change patterns are monitored, which utilize multi-temporal panchromatic EOC image data; and application potentials of ancillary data fur updating existing data can be presented. In this research, with the use of the land use change, monitoring of urban growth has been carried out, and the potential for the application of KOMPSAT-1 EOC images and the scope of application was examined. Henceforth, the future expansion of the scope of application of KOMPSAT-1 EOC image is anticipated.

• 한국측량학회지
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• 제11권1호
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• pp.67-75
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• 1993

도시팽창 및 현대화에 따른 도시기반시설의 확충은 효율적인 도시정보관리를 위한 새로운 기법을 필요로 하게 되었으며, 최근 각종 도시기반시설 정보처리에 이용되는 토지정보체계는 좋은 예이다. 도시기반 시설정보체계 중 하수정보체계 또한 업무의 효율화, 고도화를 위해 토지정보체계의 이용이 필요하며, 비 전문가의 용이한 접근을 위해서는 전문가 기법의 이용이 또한 필요하다. 본 연구는 관계형 데이타베이스의 분석 및 조회 능력과 벡터를 기본으로 하는 토지정보체계의 Chain Topology Generator 기능, 하수시설 용량산출에 관한 전문가 지식을 통합하여 사용자 편의를 도모하고, 사전정보의 제공으로 예측계획을 가능하게 하며, 하수량 분석 및 예측을 자동화한 도시 하수용량 분석 시스템을 개발하여 서울시의 사례지역에 적용하였다.

• 한국환경교육학회지:환경교육
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• 제10권2호
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• pp.175-190
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• 1997

The objective of this study is to increase bio-diversity by developing more efficient methods to created habitats and applying them in introducing prototypes of forest, grassland, and marsh which are found in natural ecosystem, to urban environment. In this context, in creating man-made marsh in Seoul Engineering High School, firstly, philosophical framework to create man-made marsh to restore urban nature and conceptual system to create a region considering life and ecosystem were established. Secondly, by applying the philosophical framework and the conceptual system, water quality section, plantation section, and techniques to create habitats to increase bio-diversity were introduced. Lastly, when the creation is completed, maintenance of the marsh will continue with participation and education of students and residents. This study presents how natural environment can be restored and created in urban areas. This may be viewed as modest beginning. I expect this study proves to be effective in increasing bio-diversity, fulfill its role as an experiment station for restoration and creation of natural environment and natural educational center for students and community as well as habitats for wild life, and open a new chapter in developing a society seeking co-existence of humankind and life. Therefore, when technological guideline on restoration and creation of man-made marsh in urban area is developed based on the outcome of this study, expansion of the project to nationwide including metropolitan cities like Seoul is recommended.

• 한국습지학회지
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• 제18권1호
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• pp.1-9
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• 2016

국립공원 주변지역은 도시확장과 개발로 인하여 야생동물들의 이동통로가 단절되고 서식지들은 작은 조각들로 파편화되었다. 서식지의 파편화는 야생동식물들의 교류감소와 근친교배로 인한 생물들의 다양성을 감소시켜왔다. 무등산국립공원 주변지역의 생태축을 파편화 시키는 주요 원인은 묘지, 산맥 절개지, 도로와 공공주차장, 농지에 의한 산지잠식, 도시기반시설, 송전탑, 도시지역 등이다. 국립공원 주변지역은 국립공원과 도시지역의 생태계가 서로 교류하며 공생할 수 있도록 생태디자인을 통해 연결체계를 갖추어야 한다.

• 한국컴퓨터정보학회논문지
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• 제22권1호
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• pp.41-48
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• 2017

In this study, we proposed GIS-based Regional Crime Prevention Index (RCPI) development method designed to support local governments with systematic crime prevention activities. The public interest in safe urban environment is increasing rapidly. The government is putting efforts into crime prevention activities to eliminate the criminal opportunities in advance. CPTED is method to prevent crimes in the city by improving environmental factors that cause crime. It is used by local governments to promote the crime prevention activities centering on the expansion of CCTVs and street lamps and the improvement of street environment. However, most policies were terminated as one-off programs and it is necessary to monitor the effect of such policies on a continuous basis. In order to alleviate issues, this study proposed RCPI as part of crime safety assessment in urban environments. The estimation of RCPI in City A of Gyeonggi-do showed relative differences in 31 districts (dong), indicating that it is also possible to evaluate the crime safety in the local community on the level of the administrative dong, the smallest administrative district in the urban environments. As a crime map, the RCPI will be used effectively as he reference to support the decision making process for local government in the future.

• Earthquakes and Structures
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• 제9권5호
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• pp.1029-1044
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• 2015

To investigate the seismic pounding response of long-span bridges with high-piers under strong ground motions, shaking table tests were performed on a 1/10-scaled bridge model consisting of three continuous spans with rigid frames and one simply-supported span. The seismic pounding responses of this bridge model under different earthquake excitations including the uniform excitation and the traveling wave excitations were experimentally studied. The influence of dampers to the seismic pounding effects at the expansion joints was analyzed through nonlinear dynamic analyses in this research. The seismic pounding effects obtained from numerical analyses of the bridge model are in favorable agreement with the experimental results. Seismic pounding effect of bridge superstructures is dependent on the structural dynamic properties of the adjacent spans and characteristics of ground motions. Moreover, supplemental damping can effectively mitigate pounding effects of the bridge superstructures, and reduce the base shear forces of the bridge piers.

• 교육시설 논문지
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• 제28권6호
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• pp.15-28
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• 2021

This study aims to propose a hypothetical urban neighborhood, HanGyo-dong, which is a model for understanding the relationship between the neighborhood change and educational facilities. Three issue layers of the model derived from preceding case studies are: establishment, relocation and redevelopment of educational facilities; formation and redevelopment of adjacent residential areas; and growth of neighborhood commercial cores. The neighborhood changes observed through HanGyo-dong include (1) the formation of educational base and commercial activities along the stream, (2) the growth of student and intellectual community and the installment of public transportation nodes, and (3) the relocation of schools and hospitals followed by a series of redevelopments of single family house into multi-family housing of low-rise residence and high rise apartment complex. The findings call for the collaborative practice of educational administration and neighborhood planning regarding how educational facilities, which were the tool for urban expansion policy, will contribute to the development of the neighborhood's identity as a localized hub.