• Title/Summary/Keyword: Spatial association

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A Spatial Statistical Approach to Residential Differentiation (I): Developing a Spatial Separation Measure (거주지 분화에 대한 공간통계학적 접근 (I): 공간 분리성 측도의 개발)

  • Lee, Sang-Il
    • Journal of the Korean Geographical Society
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    • v.42 no.4
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    • pp.616-631
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    • 2007
  • Residential differentiation is an academic theme which has been given enormous attention in urban studies. This is due to the fact that residential segregation can be seen as one of the best indicators for socio-spatial dialectics occurring on urban space. Measuring how one population group is differentiated from the other group in terms of residential space has been a focal point in the residential segregation studies. The index of dissimilarity has been the most extensively used one. Despite its popularity, however, it has been accused of inability to capture the degree of spatial clustering that unevenly distributed population groups usually display. Further, the spatial indices of segregation which have been introduced to edify the problems of the index of dissimilarity also have some drawbacks: significance testing methods have never been provided; recent advances in spatial statistics have not been extensively exploited. Thus, the main purpose of the research is to devise a spatial separation measure which is expected to gauge not only how unevenly two population groups are distributed over urban space, but also how much the uneven distributions are spatially clustered (spatial dependence). The main results are as follows. First, a new measure is developed by integrating spatial association measures and spatial chi-square statistics. A significance testing method based on the generalized randomization test is also provided. Second, a case study of residential differentiation among groups by educational attainment in major Korean metropolitan cities clearly shows the applicability of the analytical framework presented in the paper.

Subway Network Expansion and Spatial Restructuring of Accessibility in Seoul

  • Lee, Keum-Sook
    • Journal of the Korean Regional Science Association
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    • v.11 no.2
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    • pp.53-63
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    • 1995
  • Changes in transport are reflected in the accessibility of a place, which is denoted as the inherent advantageous characteristics of a place with respect to overcoming spatial friction, and affect the land use ultimately. A composite accessibility measurement scheme is developed and applied to the subway network in Seoul, which has been constructed in 1972. Changes in the transport network are reflected in the spatial structure of accessibility and affect ultimately the land use pattern. Therefore, it is of relevance to examine the changes in the spatial structure of accessibility, which allows to forecast the direction of changes in the land use pattern.

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Investigation Into Optimal Installation Position of TMD for Efficient Seismic Response Reduction of Retractable-Roof Spatial Structure (개폐식 대공간 구조물의 효율적인 지진응답제어를 위한 TMD의 최적 설치 위치 분석)

  • Lee, Young-Rak;Kim, Hyun-Su;Kang, Joo-Won
    • Journal of Korean Association for Spatial Structures
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    • v.18 no.2
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    • pp.43-50
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    • 2018
  • In this study, TMD(Tuned Mass Damper) is installed in a retractable-roof spatial structure in order to investigate dynamic response characteristics according to mass ratio and installed position of TMD on large spatial structures. The example analytical model is generated based on the Singapore sports hub stadium. Twenty eight analytical models are used to investigate optimal installation position of TMD for the example retractable-roof spatial structure using 4 to 16 TMDs. The mass of one TMD is set up 1% of total mass at the example analytical model. Displacement response ratio of model with TMD is compared with that of base model without TMD. It has been found from numerical simulation that it is more effective to install TMD at the edge of the spatial structure rather than to concentrate the TMD at the center of the spatial structure.

Deriving of Critical Factors for Construction Planning in Large Span Roof Construction (대공간 지붕 철골공사의 시공계획 중점관리항목 도출)

  • Lee, Myungdo
    • Journal of Korean Association for Spatial Structures
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    • v.18 no.1
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    • pp.67-75
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    • 2018
  • Steel roof construction is on the most important and critical factors in the large spatial construction and necessary to be prepared under a radical planning. Therefore, the major management factors of steel roofing structure assembly must be critically reviewed during planning. Through the review process, it is necessary to reduce the construction cost, to prevent delays in the construction schedule, and to minimize construction errors. However, domestically due to the lack experience in large spatial constructions, a planning of roof construction is limited to have a radical planning. Especially due to unclear organization of the management factors in hierarchy, using them in reality for construction planning is difficult and reliability is low. Therefore, in this study, the goal is to conduct the major management factors in the large spatial construction. To achieve this, we have reviewed and analyzed the numbers of construction plans and construction reports and conducted a total 68 of the management factors. Based on the conducted factors, we have interviewed 16 experts with experience in large spatial construction. From the interview result, we have deduced the factors scored above 4.20 of 10 for critical factors. The results of this study will be used as a guidance for planning steel roofing structure assembly in large spatial construction. The critical factors will be provided to the site mangers for the quality management of large spatial constructions in practice.

Exploring Spatial Dependence in Vacant Housing Growth (빈집 증가의 공간적 자기상관성에 대한 탐색적 연구)

  • Jung, Suyoung;Jun, Hee-Jung
    • Journal of Korea Planning Association
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    • v.54 no.7
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    • pp.89-102
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    • 2019
  • The growth of vacant housing has been problematic in both Korea and other countries as it causes various socio-economic problems and negatively affects residential environments. Despite the importance of effectively managing vacant housing, few studies have been undertaken regarding spatial patterns of vacant housing growth. This study aims to examine spatial dependence in vacant housing growth. We used 2005 and 2015 Population and Housing Census and employed spatial modeling. The empirical analysis shows that there is spatial dependence in vacant housing growth. Also, the spatial clusters of growing vacant housing are present in the non-capital region and nearby cities while the spatial clusters of declining vacant housing are present in the capital region. The policy implications of this study are as follows: First, local governments should make collaborate efforts with geographically proximate cities for more effective management of vacant housing. Second, given that vacant housing is more prevalent and growing in the non-capital region, it is necessary to employ differential policies to manage housing vacancy between the capital and non-capital regions.

A Study on the Curriculum Development of Spatial Convergence Studies (주거학 전공분야를 위한 공간정보 관련 교과과정 개발 기초연구)

  • Park, Nam-Hee;Choi, Jae-Soon
    • Journal of the Korean housing association
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    • v.22 no.3
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    • pp.73-82
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    • 2011
  • The purpose of this study was to develop the curriculum of spatial convergence studies for the major field of housing and interior design. Documentary research and content analysis methods were used in this study. Data drawn from internet homepage of each universities which were 20 colleges the major field of housing and interior design and 160 colleges of architectural design, and public institutions the MLTM and the KRIHS. The major results of this study were as follows. 1) Government has been supported the specialized graduate school of spatial information and the university which they have spatial information curriculum during 5 years. 2) The department of spatial information has been educated the theory and practice about spatial issues in order to train the spatial specialist helpful to the new growing industry. 3) There were little changed curriculum which has related to the department of housing and interior design. The half of their curriculum were housing project and interior design. The spatial convergence studies educational program should be grow up step by step. The first is basic level to learn the basic theory of spatial studies for example the spatial introduction or the housing and the second is low level to learn the depth theory of spatial studies for example the design I or the housing development. The third is middle level to apply the depth theory of spatial studies for examples the design II, III or housing policy and institutions. And the last is high level to practice the depth theory of spatial studies for example housing construction or internship.