• 한국실내디자인학회논문집
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• 제14권5호
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• pp.236-244
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• 2005

This study investigates the effects of the spatial elements of the mulit-purpose commercial complex on visitors' circulation pattern and wayfinding by employing method of space syntax, observation, and interview survey. Two commercial complexes were investigated; Techno-mart represented a vertical type and COEX mall rendered a horizontal one. Analysis of the spatial elements using space-syntax method provided a base line for comparing analyses by the two other methods. Analysis of the interview additionally survey identified the factors affecting wayfinding behavior and contributing satisfaction. The findings suggest that level of the effects of the spatial configuration on visitors' circulation pattern is greater in Techno-mart(vertically oriented) than COEX(horizontally). In COEX, for instance, specific route that connects sub-way station and cinema complex carries far more traffic than main route, even though the main route indicates higher degree of integration of spatial configuration. Similar with observation, the degree of integration is corresponding with the satisfaction and easiness of wayfinding behavior In COEX, specific place and feature seem to have more effects on visitors' wayfinding behavior and circulation pattern than the level of integration of spatial configuration.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2002년도 추계학술발표논문집 (하)
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• pp.1899-1902
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• 2002

이 논문에서는 위치기반서비스 플랫폼을 위한 이동객체 질의어를 제안한다. 최근 이동 객체를 다루는 다양한 위치기반서비스 및 데이터베이스 응용들이 등장함에 따라 이동 객체의 공간 정보를 저장 관리하고 정보를 요구하는 다양한 사용자 질의를 처리할 필요성이 대두되었다. 그러나 기존의 이동객체 질의어는 위치기반서비스에서의 특성을 충분히 반영하고 있지 못하다. 따라서 이 논문에서는 이동객체 데이터베이스에 대하여 시계열 질의와 슬라이스 표현을 지원하도록 함으로서 기존 이동객체 질의어에 비해 강력한 표현력을 갖는 질의어를 제안하고 있다.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2002년도 추계학술발표논문집 (상)
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• pp.823-826
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• 2002

이동 객체에 대한 위치 정보의 획득, 저장, 데이터 모델링 방법과 질의 처리 방법에 관한 다양한 연구가 진행됨에 따라 이동 객체의 위치 정보를 획득, 저장, 관리, 질의 처리가 가능한 이동 객체 데이터 베이스 시스템이 등장하고 있다. 그러나 이동중인 사용자가 자신의 요청을 시스템이 제공하는 복잡한 시공간 질의어로 표현하기는 어렵다. 따라서 이 논문에서는 이동 단말기에서 사용자가 편리하게 질의를 요청하고 현재 또는 과거의 위치를 추적하며 이동 객체들에 대한 모니터링을 하기 위한 사용자 인터페이스를 설계하고 이러한 인터페이스를 구현하기 위한 시스템을 설계한다.

• 한국HCI학회:학술대회논문집
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• 한국HCI학회 2006년도 학술대회 1부
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• pp.884-892
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• 2006

This paper describes a framework for multimodal object manipulation in virtual environments. The gist of the proposed framework is the semantic integration of multimodal input using spatial ontology and user context to integrate the interpretation results from the inputs into a single one. The spatial ontology, describing the spatial relationships between objects, is used together with the current user context to solve ambiguities coming from the user's commands. These commands are used to reposition the objects in the virtual environments. We discuss how the spatial ontology is defined and used to assist the user to perform object placements in the virtual environment as it will be in the real world.

• 한국정보처리학회논문지
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• 제6권1호
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• pp.21-31
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• 1999

이 논문은 시공간 데이터의 통합된 연산을 위하여 공간 연산자와 시간 연산자의 경합 접속을 연구한다. 시공간 연산을 위한 통합 연구는 시공간 참조 메크로에 의한 시공간 위상관계 연산자의공통 사용을 의미한다. 또한 이 논문은 지형 객체의 이력 정보를 검색하는 이력 연산자와 시간관계 비교 연산자의 통합 알고리즘을 제안한다. 제안된 확장 알고리즘은 기존의 GIS(Geographic Information System) 공간 데이터베이스를 기반으로 구현되며, 아울러 시공간 질의표현의 예를 통해 평가된다. 여기서 연구된 시공간 연산자의 통합은 통일된 시공간 질의를 지원하는데 유용한 기반구조를 제공할 것이다.

• Korean Journal of Geomatics
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• 제2권2호
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• pp.115-122
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• 2002

Since geographic information systems (GIS) began to emerge as an effective spatial information processing technology, there also has been growing interest in integrated use of GIS with other decision support systems. As various spatial-related problems such as urban development planning and natural resource management require more analytical and interpretive solutions, it is viewed that the supportive role of GIS to complement or reinforce the counterpart decision tools will be increased. This study examines the major situations that have needed the integration methodologies in the past decade to derive research trends relating to this integration agenda and, hence, to elicit the possible underlying principles from those experiences. According to the kinds of decision tools linked with GIS, alternative methodologies and viewpoints are categorized and compared.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2002년도 Proceedings of International Symposium on Remote Sensing
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• pp.138-143
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• 2002

This paper describes a framework for extending GIS databases to support moving object data type and query language. The rapid progress of wireless communications, positioning systems, and mobile computing devices have led location-aware applications to be essential components for commercial and industrial systems. Location-aware applications require GIS databases system to represent moving objects and to support querying on the motion properties of objects. For example, fleet management applications may require storage of information about moving vehicles. Also, advanced CRM(Customer Relationship Management) applications may require to store and query the trajectories of mobile phone users. In this trend, maintaining consistent information about the location of continuously moving objects and processing motion-specific queries is challenging problem. We formally define a data model and query language for mobile objects that includes complex evolving spatial structure, and propose core algebra to process the moving object query language. Main profit of proposed moving objects query language and algebra is that proposed model can be constructed on the top of GIS databases.

• 한국주거학회논문집
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• 제25권2호
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• pp.89-98
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• 2014

The purpose of this study was to analyze the environmental privacy on the perspective of integration and segregation of spatial areas in facilities for the elderly, through investigating required environmental privacy at each hierarchical space, the contextual situation and counterplan for the privacy. For the study, a content analysis for 35 foreign academic journal articles published from 1990 to August of 2013 was conducted. The results of the study were as follows: First, four hierarchical spaces had somewhat integrated characteristics as being required various types of privacy beyond the original features of each space. Especially semi-public and public spaces were needed the privacy similar to in private or semi-private areas. Second, the contextual situation for the privacy was mainly from undesirable access and psychological pressure of other residents, staff and etc. to the residents' personal space, stuff, and behaviors. The other was from no space (no sitting) or no equipments for privacy. Third, the counterplan for privacy was categorized as improvements of physical environments and making defensible space or keeping physical distance of the elderly. It is suggested that welfare of the aged act in Korea about the room capacity for the elderly facilities needs to be reconsidered for the privacy in their individual rooms and the privacy in semi-public and public area must be considered to make the behavior scope of the elderly extended.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1998년도 하계학술대회 논문집 E
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• pp.1831-1833
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• 1998

In this paper, A complex-image method(CIM) and efficient numerical integration algorithm is implemented to evaluate the spatial-domain Green's function through the Sommerfeld-type integral with a thick substrate. CIM is compared to numerical integration technique.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2006년도 International Symposium on GPS/GNSS Vol.1
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• pp.127-132
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• 2006

The Global Positioning System (GPS), Inertial Navigation System (INS) and Pseudolite (PL) technologies all play very important roles in navigation systems. As an independent navigation system, GPS can provide high precision positioning results which are independent of time. However, the performance will become unreliable when the system experiences high dynamics, or when the receiver is exposed to jamming or RF interference. In comparison to GPS, though INS is autonomous and provides good short-term accuracy, its use as a standalone navigation system is limited due to the time-dependent growth of the inertial sensor errors. PLs are ground-based transmitters that can transmit GPS-like signals. They have some advantages in that their positions can be determined precisely, and the Signal-to-Noise Ratios (SNR) are relatively high. Because their combined performance, in principle, overcomes the shortcomings of the individual systems, the integration of GPS, INS and PL is increasingly receiving attention from researchers. Depending on the desired performance vs complexity, system integration can be carried out at different levels, namely loose, tight and ultra-tight coupling. Compared with loose and tight integration, although it is more complex in terms of system design, ultra-tight integration will be the basis of the next generation of reliable and robust navigation systems. Its main advantages include improved performance under exposure to high dynamics, and jamming and RF interference mitigation. This paper presents an overview of the ultra-tight integration developments and discusses some of the challenging issues.