• 한국멀티미디어학회논문지
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• 제13권12호
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• pp.1843-1854
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• 2010

The utilization of underground space has recently increased with the complication of road, the rise of the land price, and the development of green technology. Underground space ranges from classical excavations to subway, underground cities, and shopping malls where there are crowds of people. At this time, government has spent a lot of money in installing various types of safety facilities for preparations of increasing potential disasters. Therefore, an effective facility management system is required. In this paper, we propose an information retrieval process to effectively extract the facilities' information based on the ontology and spatial analysis in underground space. The ontology-based searching supports hierarchical and associated results as well as knowledge sharing with hierarchy concepts. The spatial analysis based searching has "Buffer" and "Near" functions to operate on a map without understanding any property of the facility information.

• Journal of Information Processing Systems
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• 제12권2호
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• pp.263-274
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• 2016

The exceptional development of electronic device technology, the miniaturization of mobile devices, and the development of telecommunication technology has made it possible to monitor human biometric data anywhere and anytime by using different types of wearable or embedded sensors. In daily life, mobile devices can collect wireless body area network (WBAN) data, and the co-collected location data is also important for disease analysis. In order to efficiently analyze WBAN data, including location information and support medical analysis services, we propose a geohash-based spatial index method for a location-aware WBAN data monitoring system on the NoSQL database system, which uses an R-tree-based global tree to organize the real-time location data of a patient and a B-tree-based local tree to manage historical data. This type of spatial index method is a support cloud-based location-aware WBAN data monitoring system. In order to evaluate the proposed method, we built a system that can support a JavaScript Object Notation (JSON) and Binary JSON (BSON) document data on mobile gateway devices. The proposed spatial index method can efficiently process location-based queries for medical signal monitoring. In order to evaluate our index method, we simulated a small system on MongoDB with our proposed index method, which is a document-based NoSQL database system, and evaluated its performance.

• 한국공간구조학회논문집
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• 제5권2호
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• pp.81-87
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• 2005

The Space structures may have large freedom in scale and form. And especially Hybrid structures are received much attention from the view points of their light weight and aesthetics. Hybrid systems are stable structures which are reticulated spatial structures composed of compressive straight members, struts and cables and Membranes. In this paper, The Hybrid Unit System are suggested using the Membrane and Cable elements based on the Tensegrity Unit system. Also, The Hybrid System of double-layered single curvature is presented. We analyze the force density method allowing form-finding for Tensegrity systems. And We analyze the shape analysis by the LARSH which is the program for nonlinear analysis.

• 한국측량학회지
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• 제10권2호
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• pp.31-36
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• 1992

최근 지형공간정보체계(GSIS)는 도시업무에 있어서 의사결정의 보조수단으로 사용되고 있으며, 특히 도시의 여러 관리 및 계획, 통제업무를 체계적으로 추진하기 위해 지형공간정보체계의 지형 자료기반부(database)를 구축하여 실 업무에 적용하려는 노력이 진행되고 있다. 본 연구는 지형공간정보체계의 자료기반부를 구축하는 방법 및 절차를 제시하였으며, 이를 상수도 시설물 관리 업무에 적용하였다. 상수도 사업 업무분석을 통하여 지형공간 자료기반부를 구축하였고, 지도 및 각종 도면을 사용하는 부서를 중심으로 4개의 주요 업무를 지원하는 프로그램을 개발하였다.

• 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
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• 제21권3호
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• pp.25-35
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• 2015

Purpose: Signs that are installed at unnoticeable places or that disconnect before the destination can bring errors of location information delivery. Therefore, this study aims to find out the spatial relation between structure of space and signs in the perspective of visual exposure possibility, operating arrangement and assesment by applying spatial structure theory. Methods: Effectiveness of organization of guidance signs was evaluated after the four way-finding factors(Plan Configuration, Sign System, Perceptual Access, Architectural Difference) that G.D.Weisman suggested were interpreted by spatial structure theory(J-Graph analysis, Space Syntax, Visual Graph Analysis) under the premise that it is closely related to the structure of space. Results: 1) Because the south corridor that connects each department of outpatient division is located in the hierarchy center of the space, and walking density is expected to be high, guidance signs need to be organized at the place with high integration value. 2) The depth to the destination space can be estimated through J-Graph analysis. The depth means a switch of direction, and the guidance signs are needed according to the number. 3) According to visibility graph analysis, visual exposure can be different in the same hierarchy unit space according to the shape of the flat surface. Based on these data, location adjustment of signs is possible, and the improvement effect can be estimated quantitatively. Implications: Spatial structure theory can be utilized to design and evaluate sign systems, and it helps to clearly understand the improvement effect. It is desirable to specify design and estimation of sign systems in the order of J-Graph analysis${\rightarrow}$Space Syntax Theory${\rightarrow}$visibility graph analysis.

• 농촌계획
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• 제19권2호
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• pp.107-120
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• 2013

A lot of rural development projects have been planned and implemented for revitalizing rural areas in South Korea. However, it is not easy to properly evaluate and quantitatively analyze project outcomes. For this reason only selected regions have been evaluated for rural projects by government agencies. In this study, we analyzed the purpose and the contents of the Rural Village Development Project (RVDP) and Green Tourism Village Project (GTVP) to find indicators for evaluating results of rural projects using logistic regression analysis. Outputs of this study show that RVDPs increase regional population and GTVPs positively affect the sales of agricultural products. We also estimated the spatial distribution of project effects through spatial autocorrelation analysis and local-spatial autocorrelation analysis. Results show that the Moran's I values for the proportion of farmers with avocational jobs, product sales changes, and population growth in Jeol-La province are positive and the biggest one is population growth. Especially, key areas of agricultural product sales are widely distributed.

• Spatial Information Research
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• 제12권1호
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• pp.1-12
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• 2004

이 논문에 설계된 데이터제공자는 2차원과 3차원 공간 데이터 및 시간 데이터를 저장, 검색할 수 있도록 설계되었다. 데이터제공자 시스템은 이미 수집, 구축된 2차원 및 3차원 공간 데이터를 특정 지리정보시스템에 종속적인 형태로 수정하거나 변환해야하는 추가적인 작업을 생략할 수 있도록 표준 인터페이스를 제공한다. 이 시스템은 다양한 GIS 또는 소프트웨어들이 동일한 방법으로 3차원 공간 데이터와 시간 정보에 접근할 수 있도록 메타정보를 관리하고 데이터베이스와 연결하는 데이터제공자 컴포넌트와 데이터소비자를 위해 3차원 혹은 시간차원이 포함된 GIS 데이터에 대한 인덱스 관리와 공간 연산을 담당하는 데이터접근자 컴포넌트를 포함한다. 이 3차원 데이터제공자 시스템은 다양한 3차원 공간 연산과 분석기능을 제공한다.

• 한국공간구조학회논문집
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• 제6권2호
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• pp.131-136
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• 2006

It is important to evaluate energy absorption capacity of frames required during a design earthquake. An inelastic computer analysis based on mathematical modelling of energy absorbing frames and elements makes it possible to evaluate required energy absorption capacity. But such an analysis sometimes consumes much computation time particularly in case of complicated structural system. This paper presents a proposal to predict energy absorption of multi-bent steel frames by simple equivalent linear method.

• 제어로봇시스템학회논문지
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• 제12권9호
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• pp.898-904
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• 2006

Ionospheric storms, caused by the interaction between Solar and geomagnetic activities, may degrade the differential GNSS(Global Navigation Satellite Systems) performance significantly, and the importance of the ionospheric storm research is growing for the GBAS(Ground-Based Augmentation System) and SBAS(Satellite-Based Augmentation System) development. In order to support Korean GNSS augmentation system development, a software tool for analyzing the regional ionosphere is being developed and its preliminary results are discussed. After brief description of the ionosphere and ionospheric storm, the research topics on the GBAS applications are discussed. The need for ionospheric spatial gradient analysis is described and some results on the ionospheric spatial gradient during recent storm periods are discussed.

• 정보처리학회논문지:소프트웨어 및 데이터공학
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• 제2권12호
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• pp.849-854
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• 2013

본 논문에서는 공간 데이터를 기반으로 한 도시의 다양한 통계 정보를 제안된 알고리즘을 통해서 시각화하고 시각화된 데이터를 지도와 사상(Mapping)하여 분석할 수 있게 할 뿐만 아니라 공간적 정보를 기반으로 의사 결정을 하는 경우 활용할 수 있는 문서를 사용자의 간단한 조작으로 프로그래밍 방식에 의해 작성해주는 시스템을 제안한다. 제안된 기법은 2차원 지도 데이터에서 특징데이터 값에 대해 색을 이용하여 표현하는 기법인 히트 맵 분석 (Heat Map Analysis)기법과 공간적 근접성을 정의할 때 이용되는 버퍼링 분석 (Buffering Analysis) 기법을 활용한다. 본 시스템을 통해서 공간적 정보를 시각화를 한다면 지역의 분포된 다양한 공간적 정보를 쉽게 파악할 수 있을 것이다. 또한 분석된 정보를 기반으로 제공되고 있는 문서 자동생성기능을 활용한다면 표현된 공간적 정보의 문서화에 필요한 많은 시간과 비용을 절감할 수 있을 것으로 기대된다.