• 한국공간정보시스템학회 논문지
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• 제11권2호
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• pp.143-150
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• 2009

공간 데이터웨어하우스는 공간 DBMS 또는 다양한 소스데이터로부터 시간에 따라 추출된 공간데이터를 ETL 과정을 통해 가공된 데이터를 관리하는 시스템이다. 적재 주기 마다 추출된 공간데이터는 비공간 데이터와 달리 같은 주제의 중복된 공간 정보가 유용하지 않으며, 공간 데이터의 특징으로 저장 공간의 낭비가 크다. 또한 이기종간의 시스템에서 소스 데이터를 추출할 경우 서로 다른 공간데이터 타입 및 스키마를 가지고 있어 이를 위한 공간데이터 추출 기법이 요구된다. 기존 기법에서는 기준이 되는 Geocoding DB를 이용하여 추출된 공간데이터에 대한 주소 매칭과정을 수행함으로써, 정형화된 데이터 셋을 적재한다. 하지만 이 기법은 추출 데이터를 매번 Geocoding DB와 비교 연산이 발생하며, 주제별로 공간 데이터를 통합 관리함에 따라 이 기종 공간 DBMS 사이에 중복된 데이터를 고려하지 않는 문제점이 있다. 본 논문에서는 공간 데이터웨어하우스 구축기 내에서 이 기종의 소스 시스템으로부터 추출된 갱신질의 통합을 이용한 효율적 추출 기법을 제안한다. 이는 이 기종의 공간 DBMS로부터 발생한 과거 적재 시점부터 현재까지 발생한 질의 중 삽입이나 삭제 등의 업데이트 관련 질의만을 추출하여 공간데이터의 불필요한 추출 연산 비용을 제거한다. 또한 소스 공간 데이터베이스 관리시스템의 업데이트 질의를 이용하여 추출된 공간 데이터를 주제별로 중복 제거 및 통합 한다. 제안 기법은 데이터 중복 저장에 의한 저장 공간의 낭비를 줄이고, 적재시점 별 통합된 데이터를 적재함으로써 빠른 공간데이터 분석을 지원할 수 있다.

• 한국공간정보시스템학회 논문지
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• 제1권1호
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• pp.5-18
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• 1999

최근 들어 공간 데이타베이스 시스템에 저장되어 있는 공간 데이타로부터 새로운 지식을 자동으로 추출해야 할 필요성이 증가함에 따라 공간 데이타베이스 시스템에 명시적으로 저장되어 있지 않은 암시적인 지식이나 공간 데이타간의 연관 관계, 그리고 다른 새로운 지식을 추출해 내는 학문인 공간 데이타 마이닝에 대한 연구가 증가하고 있다. 이러한 유용한 지식을 공간 데이타로부터 추출하기 위해서는 공간 데이타를 효율적으로 저장하고, 빠른 인덱스와 검색 기능을 제공하고, 또한 분산환경을 지원할 수 있는 객체 관리 시스템이 필요하다. 본 논문에서는 공간 데이타 마이닝 시스템에서 사용되는 공간, 비공간, 지식 데이타를 효율적으로 관리할 수 있는 개방형 객체 관리 시스템을 설계 및 구현하였다. 개방형 객체 관리 시스템을 개발하기 위하여 본 논문에서는 현재 많은 분야에서 사용되고 있는 Open OODB에 공간 데이타 타입의 지원, 동적인 클래스의 생성 객체-지향 개념의 상속성 지원, 공간 인덱스의 지윈, 공간 연산 함수 제공 등의 기능을 추가하여 확장하였다. 또한, 본 논문에서는 다른 공간 데이타베이스 시스템이나 공간 데이타 마이닝 시스템과의 상호운영성을 증가시키기 위하여 데이타 모델링을 위해 ODMG 2.0, 데이타 모델링과 공간 데이타의 교환을 위해 SDTS(Spatial Data Transfer Standard), 그리고 클라이언트와 서버간의 효율적 연동을 위해 OpenGIS Simple Features Specification for CORBA를 수용하였다.

• 한국수학교육학회지시리즈D:수학교육연구
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• 제17권2호
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• pp.99-118
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• 2013

The present study focuses on the contribution of a teaching unit to the development of spatial ability of third graders in general and from a gender point of view in particular. The research population consisted of seventy-four pupils: thirty-seven pupils in the experimental group who attended the teaching unit and thirty-seven pupils in the control group. The spatial ability of all the pupils was examined by means of common tests which checked cognitive capabilities of spatial ability. The research findings illustrate an improvement in the spatial ability of the experimental group pupils following the participation in the teaching unit. Moreover, regarding the gender aspect, the findings show that there was no significant differentiation between the spatial ability of third grade boys and the spatial ability of girls of the same age group.

• 대한가정학회지
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• 제42권10호
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• pp.79-89
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• 2004

This study was designed to investigated children's spatial cognitive skills as based on their practice with computer games. The sixty children were divided into 3 groups there were twenty children in experimental group 1 (the geometric game experimental group), twenty children in experimental group 2 (the arcade game experimental group), and twenty children in the control group. The sSpatial cognitive skills of the children were assessed according to by visual speed, mental rotation, and spatial visualization tasks. The rResults showed that computer game practice enhanced the children's spatial skills (visual speed, mental rotation and, spatial visualization). The c Children's mental rotation and spatial visualization showed a significant difference with the type of computer game.

• ETRI Journal
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• 제30권6호
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• pp.853-855
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• 2008

This paper presents an energy-efficient spatial join algorithm for multiple sensor networks employing a spatial semijoin strategy. For optimization of the algorithm, we propose a GR-tree index and a grid-ID-based spatial approximation method, which are unique to sensor networks. The GR-tree is a distributed spatial index over the sensor nodes, which efficiently prunes away the nodes that will not participate in a spatial join result. The grid-ID-based approximation provides great reduction in communication cost by approximating many spatial objects in simpler forms. Our experiments demonstrate that the algorithm outperforms existing methods in reducing energy consumption at the nodes.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2007년도 추계학술대회논문집
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• pp.33-36
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• 2007

Acoustic holography exhibits the spatial distribution of sound pressure in time or frequency domain. The obtained picture often contains far more than what we need in practice. For example, when we need to know only the locations and overall propagation pattern of sound sources, a method to show only what we need has to be introduced. One way of obtaining the necessary information is to use envelope in space. The spatial envelope is a spatially slowly-varying amplitude of acoustic waves which contains the information of sources' location. A spatial modulation method has been theoretically developed to get a spatial envelope. By applying the spatial envelope, not only the necessary information is obtained but also computation time is reduced during the process of holography. The spatial envelope is verified as an effective visualization scheme in time domain by being applied to complicated sound fields.

• 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
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• 제14권2호
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• pp.25-34
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• 2008

The purpose of this study was to spatial organization feature and area composition of the over 500beds general hospital that will be expected construct in Seoul, Gyeonggi-do area after 2000year. From this study, we can suggest architectural planning for the efficiency operating of emergency medical facilities that can be used as preliminary data. The Spatial organization of emergency medical facilities are categorize into 4 session as medical examination and treatment, diagonosticradiology, staff, public and the others. We can find spatial organization system and area composition that compare area composition of 6 hospital the subject of research in a emergency medical facilities. The result of this study were as follows : spatial distribution of its field, grasping of spatial organization factor and recognize its merits and demerits should be researched in advance. Through this kind of recognizing emergency system, realistic medical local and condition architectural planning for spatial organization will be operate.

• 한국CDE학회논문집
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• 제17권1호
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• pp.7-16
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• 2012

One distinguishing feature of BIM(Building Information Modeling) is the objectification of spatial elements independently, which makes it easy to represent spatial network. From this perspective, this study aimed to develop the spatial network analysis tool based on open BIM technologies. From the literature review, an object model of spatial network with nodes and links and a process model from construction to visualization were established. A prototype system implementing the proposed models, named SNAT(Spatial Network Analysis Tool), was developed in Java platform with using its open source packages. SNAT can create a spatial network from IFC-BIM model, calculate the indices of spatial network analysis, and visualize it with the representing types(map, graph, matrix and table).

• 한국조경학회지
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• 제27권3호
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• pp.50-57
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• 1999

This study aim to clarify the way of spatial composition of Tongdo Temple by diachronic analysis. The way of spatial composition was clarified through the analysis of built in architectural system in three periods. The result are as follows; 1. Spatial composition of Tongdo temple was changed in three period that it were establishment period, 1300s, and 1700s by the transition of meaning structure occurring the transition of spatial composition. 2. It was found out that the wat of spatial composition was three through the diachronic analysis the transition of spatial composition in Tongdo temple. 3. Juxtaposition as a way of spatial composition found out through the diachronic analysis is equivalent articulation of three sections; an upper, a middle, and a lower section and polyaxis or polycore in the each sections. Fusion is heterogenetic minglement mingling different kind of buildings and conjugation conjugating different kind of decorations. And accumulation of layer is mutilayer laying different time of layer and multi aspect aligning different kind of aspects since the temple's establishment.

• 아동학회지
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• 제6권1호
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• pp.61-74
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• 1985

The purpose of the present study was to investigate the relationship between spatial ability and sex-role orientation in children. For this purpose, 303 boys and 293 girls were selected randomly. Spatial ability was measured by Embedded Figures Test. Sex-Role orientation was measured by the Children's Personal Attributes Questionnaire (Spence, Helmreich & Stapp, 1975) which was translated into Korean. An item analysis was done. For the data analysis, a three-way analysis of variance and t-test were applied. The results of the present study showed that 1) spatial ability gradually improved between 10 and 14 years of age. 2) There were no significant differences between girls and boys in the performance on the spatial ability test. 3) Masculinity in girls was not significantly associated with high spatial ability. However, there was a tendency for the masculine girls in the direction of higher spatial scores than feminine girls and undifferentiated girls. 4) Femininity in boys was not significantly associated with high spatial ability. However, there was a tendency for the feminine boys in the direction of higher spatial scores than masculine boys and undifferentiated boys.