• Proceedings of the Korean Information Science Society Conference
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• 2002.04b
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• pp.67-69
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• 2002

여러 사이트에서 구축된 공간 데이터를 효율적으로 관리 및 공유하기 위해서는 대용량의 정보를 처리할 수 있는 분산 공간 데이터베이스 시스템의 사용이 필수적이다. 이러한 분산 공간 데이터베이스 시스템상에서의 분산 공간 죠인 질의는 공간 데이터의 대용량성과 그 복잡성으로 인하여 공간 연산의 지펴져 부하와 네트워크상의 전송 부하를 발생시킨다. 이러한 문제를 해결하기 위해 세미죠인 기반의 공간 죠인 기법들이 제안되었으나 공간 죠인 연산을 특정 서버에서만 수행하여 병목현상을 발생시키기 때문에 결국 질의 처리시간이 증가된다. 본 논문은 이러한 분산 공간 데이터베이스 시스템에서 수행 비용이 많이 드는 원격 사이트간의 공간 죠인 연산에 대해 R+-tree 공간 색인을 사용하여 병렬적으로 수행하는 기법을 제안한다. 본 기법은 R+-tree 공간 색인을 이용하여 공간 죠인 연산의 대상이 되는 릴레이션들을 중첩이 없는 두개의 릴레이션들로 분할한 후 질의 수행에 참여하는 두 서버에 죠인 연산을 분배하고 병렬적으로 처리하여 결과들을 병합한 다음 클라이언트에게 전송만다. 본 기법은 릴레이션을 분할하여 각 서버에서 공간 죠인 연산을 병렬적으로 처리하므로 처리 비용을 절반으로 감소시키며. R+-tree의 영역에 해당하는 객체들만 죠인 연산에 참여하게 함으로써 네트워크 전송 비용을 감소시킨다

• Journal of the Korean association of regional geographers
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• v.19 no.2
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• pp.362-374
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• 2013

ICTs(Information and Communication Technologies) have changed the ways of social activities and communications, and in the process, online and offline spaces have been thought of as binary spaces in which online spaces substitute and erode offline spaces. The aim of this study is to explore how urban space where local social activities and communications are performed is constructed in terms of timespace through the intersection of online and offline communications and how the urban space is 'remediated' through online spaces. For this, the study looks at the case of a workshop on 'locality education' held at the Yeungnam University Museum in January 2013. Criticizing the dichotomist viewpoint that increasing in communications through online spaces results in the expansion of 'absent presence' or 'placelessness' in offline spaces, the study argues that online spaces remediating offline spaces are spaces not transcending the timespace constraints of the offline spaces but rather reflecting the spatial, temporal, material, social, cultural environments of urban space and place.

• Journal of the Korean Geographical Society
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• v.43 no.1
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• pp.134-153
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• 2008

The main purpose of the research is to illustrate the value of the spatial statistical approach to residential differentiation by providing a framework for exploratory spatial data analysis (ESDA) using a local spatial separation measure. ESDA aims, by utilizing a variety of statistical and cartographic visualization techniques, at seeking to detect patterns, to formulate hypotheses, and to assess statistical models for spatial data. The research is driven by a realization that ESDA based on local statistics has a great potential for substantive research. The main results are as follows. First, a local spatial separation measure is correspondingly derived from its global counterpart. Second, a set of significance testing methods based on both total and conditional randomization assumptions is provided for the local measure. Third, two mapping techniques, a 'spatial separation scatterplot map' and a 'spatial separation anomaly map', are devised for ESDA utilizing the local measure and the related significance tests. Fourth, a case study of residential differentiation between the highly educated and the least educated in major Korean metropolitan cities shows that the proposed ESDA techniques are beneficial in identifying bivariate spatial clusters and spatial outliers.

• Spatial Information Research
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• v.20 no.1
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• pp.81-90
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• 2012

When analyzing geographical phenomena, two properties need to be considered. One is the spatial dependence structure and the other is a variation or an uncertainty inhibited in a geographic space. Two problems are encountered due to the properties. Firstly, spatial dependence structure, which is conceptualized as spatial autocorrelation, generates heterogeneous geographic landscape in a spatial process. Secondly, generic statistics, although suitable for dealing with stochastic uncertainty, tacitly ignores location information im plicit in spatial data. GIS is a versatile tool for manipulating locational information, while spatial statistics are suitable for investigating spatial uncertainty. Therefore, integrating spatial statistics to GIS is considered as a plausible strategy for appropriately understanding geographic phenomena of interest. Geographic hot-spot analysis is a key tool for identifying abnormal locations in many domains (e.g., criminology, epidemiology, etc.) and is one of the most prominent applications by utilizing the integration strategy. The article aims at reviewing spatial statistical perspective for analyzing spatial processes in the framework of GIS by carrying out empirical analysis. Illustrated is the analysis procedure of using spatial scan statistic for detecting clusters in the framework of GIS. The empirical analysis targets for identifying spatial clusters of breast cancer incidents in Erie and Niagara counties, New York.

• Journal of the Korean Geographical Society
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• v.47 no.5
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• pp.775-790
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• 2012

This paper considers chronologically the discourse of space as one of key concepts in geography, and then argues that geography education ought to be the critical pedagogy of space. Recent social science including geography and education has more empathized the sociality and spatiality of space than the physicality of space, and argues that space is constructed socially. Thus, it has been considered that space is no longer empty container to be filled with social relationships, but is concerned with the production and reproduction of social relationships through political struggles with diverse meanings. Now, geography education has to examine the different ways which space has been conceptualized, and develop geography education as critical pedagogy of space that focuses on reading the multiple and contested nature of space.

• Korean Institute of Interior Design Journal
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• no.19
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• pp.151-159
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• 1999

종교 공간으로서의 교회 건축물은 각 지역 단체생활의 정신적, 물질적으로 다양한 활동을 공급하고 있는 장소이다. 그러나 오늘날 변화무쌍한 현대 사회의 도심 교회들은 그 참여수가 점차 줄고 있는 젊은 세대들에게 충분한 만족을 주고 있지 못한 실정이다. 대부분의 영국 도심 교회가 변화가 어려운 예배당 공간 하나로, 각기 다른 기능을 요구하는 이용자들에게 다기능 공간을 공급하고 있으며, 과거에 잠재적 기능을 고려하지 않고 디자인된 대부분의 한국 도심교회들도 비슷한 조건의 문제 발생으로, 현 이용자들에게 또 다른 요구사항들과 불편함을 주고 있다. 이것은 이용자가 공간을 사용함으로 즐거움과 감흥을 얻기가 어렵게 구성되어 있음을 보여주고 있다. 오늘날, 젊은이들의 생활 패턴이 바뀌어 가고 있음으로 그 실태는 더욱 심각하게 나타나고 있다. 본 연구는 먼저 도심교회 공간의 전형적인 문제점과, 연령별 이용자 그룹의 우선권을 조사하고, 각기 다른 조건의 종교적 공간 사례 조사를 통해 이용자들 및 공간 디자인의 요구사항을 분석하고 있다. 이어서, 각 공간에 따른 문제 해결 방법을 성공적 공간디자인 사례자료를 토대로 정리한 후, 어떠한 종교적 공간에서도 적용 가능하도록 통합적으로 설정된 디자인목표를 바탕으로, 세가지 다른 방법의 계획서들을 제시하고 있다. 마지막으로, 이용자들의 응답을 통해 계획서를 평가하여, 그것에 근거한 결론적인 종합적 디자인 계획서를 제안하고 있다. 본 연구는 교회가 필요로 하는 기능에 따라 변화가 가능한 예배공간을 활용할 수 있는 디자인을 제시하는 데에 그 목적을 두고 있으며, 기존의 교회건물이 더욱 더 많이 사용자의 요구에 만족할 수 있도록 만들어질 수 있는가에 대한 방향이 제시되고 있다.

• Journal of the Korean association of regional geographers
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• v.16 no.1
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• pp.76-84
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• 2010

This study is to critically examine a variety of perspectives of seeing the interactions among space, people, and society. According to Tuan, place is a center of meaning constructed by people's experience, and its attributes consist of natural and built-up environments. Entrikin suggests a way of seeing place from a contrary perspective, that is, the subjective and existential sense of place and the objective and naturalistic conception of place. Lefebvre examines the historical transformation of social space through the dialectics among the perceived space, the conceived space, and the lived space. Social space is (re)produced and changed through the conflictual unit of the spatial triad. The project of Foucault's spatial metaphor is to tightly combine three critical concepts, power, knowledge, and space. Those concepts are not objectively existed regardless of specific times and spaces, but they are socially and culturally constructed through the networks of people under particular environments. In the following papers, it is needed to comparatively examine the various perspectives mentioned above to make a new conceptual framework of understanding the interactions among space, people, and society.

• Journal of the Korean Geographical Society
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• v.39 no.2
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• pp.212-228
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• 2004

This paper is concerned with an important aspect of regional income convergence, ${\beta}$-convergence, which refers to the negative relationship between initial income levels and income growth rates of regions over a period of time. The common research framework on ${\beta}$-convergence which is based on OLS regression models has two drawbacks. First, it ignores spatially autocorrelated residuals. Second, it does not provide any way of exploring spatial heterogeneity across regions in terms of ${\beta}$-convergence. Given that empirical studies on ${\beta}$-convergence need to be edified by spatial data analysis, this paper aims to: (1) provide a critical review of empirical studies on ${\beta}$-convergence from a spatial perspective; (2) investigate spatio-temporal income dynamics across the U.S. labor market areas for the last 30 years (1969-1999) by fitting spatial regression models and applying bivariate ESDA techniques. The major findings are as follows. First, the hypothesis of ${\beta}$-convergence was only partially evidenced, and the trend substantively varied across sub-periods. Second, a SAR model indicated that ${\beta}$-coefficient for the entire period was not significant at the 99％ confidence level, which may lead to a conclusion that there is no statistical evidence of regional income convergence in the US over the last three decades. Third, the results from bivariate ESDA techniques and a GWR model report that there was a substantive level of spatial heterogeneity in the catch-up process, and suggested possible spatial regimes. It was also observed that the sub-periods showed a substantial level of spatio-temporal heterogeneity in ${\beta}$-convergence: the catch-up scenario in a spatial sense was least pronounced during the 1980s.

• Proceedings of the Korean Society of Computer Information Conference
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• 2024.01a
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• pp.23-26
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• 2024

본 논문에서는 그래프 구조의 데이터에서 각 노드의 신호를 예측하는 연구를 진행하였다. 이를 위해 분석하고자 하는 그래프에 대해 연결 관계를 기반으로 각 노드에 비-유클리드 공간 상에서의 좌표를 부여하여 그래프의 공간적 임베딩을 얻은 뒤, 각 노드의 공간적 임베딩을 입력으로 받고 해당 노드의 신호를 예측하는 그래프 암시적 신경 표현 모델을 제안 하였다. 제안된 모델의 검증을 위해 네트워크형 데이터와 3차원 메시 데이터 두 종류의 그래프 데이터에 대하여 신호 학습, 신호 예측 및 메시 데이터의 초해상도 과정 실험들을 진행하였다. 전반적으로 기존의 그래프 암시적 신경 표현 모델과 비교하였을 때 비슷하거나 더 우수한 성능을 보였으며, 특히 네트워크형 그래프 데이터 신호 예측 실험에서 큰 성능 향상을 보였다.

• Journal of Korean Elementary Science Education
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• v.41 no.3
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• pp.501-520
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• 2022

Considering the importance of spatial thinking in the process of learning astronomy, it is necessary to educate pre-service teachers on teaching methods that consider spatial thinking from the teacher training program stage. Accordingly, after providing education on spatial thinking to pre-service science teachers, problems and improvement plans perceived by them were explored for the images and inquiry activities of astronomy textbook units. In this study, spatial thinking in the astronomical domain was defined as the amalgam of the concepts of space, representation tools, and reasoning processes. The juniors attending the University of Education in the metropolitan area were educated on spatial thinking for two weeks in October 2021. They were then asked to voluntarily select one of the astronomy units to analyze problems in the textbooks and present modification plans to address those problems. Finally, 33 cases presented by 22 pre-service science teachers were analyzed, and the results of the study were as follows. Pre-service teachers recognized the problems in textbooks in terms of the concepts of space and reasoning processes, and proposed improvement plans to supplement them. However, in some cases, even if pre-service teachers properly recognized a problem, the improvement plan was not appropriate, or they were not able to analyze the images or inquiry activities in terms of spatial thinking. This study is significant in that it shows that pre-service teachers have the potential to properly reorganize and revise textbooks by participating in teacher training programs on spatial thinking. Furthermore, based on the results of this study, the direction of the teacher training program concerning spatial thinking was discussed.