• 정보관리학회지
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• 제31권3호
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• pp.153-179
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• 2014

이 연구의 목적은 공동연구 네트워크에서 연구자의 영향력과 입지를 분석하는데 사용되는 중심성 지수들의 특징에 대해서 고찰하는 것이다. 전통적인 이진 네트워크 중심성 지수로는 연결정도중심성, 매개중심성, 근접중심성, 페이지랭크를 다루었고, 공동연구 네트워크에서의 중심성을 측정하기 위해서 개발되었거나 사용된 가중 네트워크 중심성 지수로는 삼각매개중심성, 평균연관성, 가중페이지랭크, 공동연구 h-지수와 공동연구 hs-지수, 복합연결정도중심성, c-지수에 대해서 살펴보았으며, 새로운 지수로 제곱근합 지수 SSR을 제안하였다. 이들 12종의 중심성 지수를 건축학, 문헌정보학, 마케팅 분야의 세 가지 공동연구 네트워크에 적용해본 결과 각 지수들의 특성과 지수 간 관계를 파악할 수 있었다. 분석 결과 공동연구 네트워크에서 공동연구 범위와 공동연구 강도를 모두 고려하기 위해서는 가중 네트워크 중심성 지수를 사용해야 하는 것으로 나타났다. 특히 공동연구 범위와 강도를 모두 고려하는 전역중심성을 측정하기 위해서는 삼각매개중심성 지수를 사용하고, 지역중심성을 측정하기 위해서는 SSR 지수를 사용하는 것이 바람직하다고 제안하였다.

• 한국조경학회지
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• 제21권2호
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• pp.120-128
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• 1993

This study suggests one hypothesis: The strength of the catchment forces of urban community parks can be represented as an equilibrium point model, which is derived from a centrality index for. That model was designed by Reilly(1931) and developed by Godlund(1956). An equilibrium point model for the catchments is represented as followed formulae: m=$\frac{CA2}{CA-CB}$ m=$\frac {{{{{L SQRT {{C}_{A}$.$ {C}_{B}} {CA-CB} Here, m is distance from the center of park A to the cetner of park B. r is radius of a circle where the catchment between park A and B is equal pointed traces. CA is index of the centrality of park A from Reilly's Law. CB is an index of the centrality of park B from Reilly's Law. L is an the distance between park A and B. The equilibrium point model is testified in the case of Chong-ju community parks. The testification has been limited to the application to such manifest outdoor recreational facilities as bentches, even though there are statistically and economically problems for a quantitative model to be testified. But the testification could be a rationale for the catchment forces of urban community parks, which was quantitatively represented that the distance between two or there parks should be related with the feasibility of the parks. Therefore, the urban community park should be planned to be located, hiving separately its identity that might be considered with the facility diversification and the locational competitiveness of a park.

• 농촌계획
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• 제15권1호
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• pp.47-59
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• 2009

The aim of this study is to analyze the green-tourism centrality considering spatial interaction using Gravity Model and social network method. The degree centrality and prestige centrality were applied as green-tourism centrality index. The rural amenity resources and human resources were counted as attraction factors, and a distance among villages was used as friction factor in gravity model. The weights of rural tourism amenity resources were calculated using the analytic hierarchy process(AHP) method and applied to evaluate green-tourism potentiality. The distance was measured with the shortest path among villages using geographic information system(GIS) network analysis. The spatial interaction from gravity model were employed as link weights between nodal points; a pair villages. Using the spatial interaction, the degree-centrality and prestige-centrality indices were calculated by social network analysis and demonstrated possibility of developing integrated green-tourism region centered on high centrality villages.

• 한국IT서비스학회지
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• 제17권2호
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• pp.179-190
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• 2018

This study is about the influence of authors' centrality on research outcomes in a large-scale collaborative research network. Using the social network analysis method, five types of centralities were derived. Six research outcomes of individual researchers were also derived through bibliographic information of the social science field for the last 10 years. A multivariate regression analysis was conducted to examine the causal relationship between the centrality and research outcome, and the effect of centrality on research outcomes was found to be statistically significant. The result of this study shows that the revised citation and H-index significantly influenced the authors' centrality. This result can imply that the centrality of the researcher can expect a considerable influence of the thesis as well as a certain level of productivity. The meaning of this study is to analyze the effect of centrality on the research outcomes of the large-scale collaborative research network in the past decade, and is carefully to suggest a guideline in order to support new research information services for active researchers and the advancement of collaborative research. This study has its limitation for interpreting the diverse academic fields of the social sciences in a uniform way. In future study, it is necessary to conduct studies using various weighted indices for network centrality in order to measure the influence of research.

• 한국농공학회지
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• 제44권1호
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• pp.69-80
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• 2002

This study aims to develop a potential centrality evaluation model (PCEM) which can evaluate the potential centrality of villages within the catchment boundaries. PCEM is a tool for evaluation of villages\` centralities by the potential centrality index (PCI) developed in this study. For quantification of PCI, total 31 evaluation criteria on the accessibility to other villages and the natural and human environment of the village were introduced. The weighting values of criteria were calculated from the step wise pair-comparision results of 14 specialists in academic fields on rural planning using by AHP (Analytic Hierachy Process) of MCE (multi-criteria evaluation) method. In the results, the weighting values of the spatial accessibility, the natural environments and the human environments were 448, 338 and 214, respectively, among total value being 1,000.

• 한국항해항만학회지
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• 제44권2호
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• pp.73-78
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• 2020

The cruise industry in the Mediterranean region increased from 2000-2018, being the second most important region after the Caribbean. The purpose of this study was to analyze the networks and hub ports of the Mediterranean. This paper used the SNA (Social Network Analysis) methodology, which includes Hub and Authority Combined Centrality (HACC) that has been used to analyze cruise port centrality, as well as degree centrality such as In-Degree, Out-Degree, and Betweenness. This empirical study suggests that the top three ports of the Mediterranean ports' network in terms of hub index are Barcelona, Civitavecchia, and Palma de Mallorca. The academic implications are the suggestion for data integration based on real itineraries and numbers of POC (Port of Calls), as well as the selection of the hubs of the targeted areas. The practical implications are suggested such as a clear requirement for cruise industry, as a way to widen the scope for the Mediterranean region and a valuable reference for cruise ship companies to select the best fit home ports.

• 농촌계획
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• 제23권3호
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• pp.121-131
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• 2017

Although the educational facility are an important considerations on a social equity standpoint, educational environment in rural areas has been continuously deteriorated by numerous social problems such as decreasing birth rate and increasing of local school closing. The purpose of this study is to evaluate the accessibility of educational environment in rural areas on village level. First, we evaluate physical accessibility based on legally defined commuting distance. Second, the implication of village population of potential accessibility is analyzed. Lastly, the facility centrality index of each village is estimated for assessing the relations of educational accessibility. The main results of this study are as follows; (1) The accessibility of most villages in Pyeongchang-gun is vulnerable that 81.10% for elementary school, 73.17% for middle school, and 82.32% for high school, respectively; (2) The average commuting distance per student considering estimated number of students for each educational facilities indicated 2.75km for elementary school, 4.37km for middle school, and 5.79km for high school; (3) the facility centrality index is highly correlated to educational facilities but not to village population.

• 디지털융복합연구
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• 제19권2호
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• pp.69-81
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• 2021

연안해운은 국가 기간 운송망으로서 중추적인 역할을 수행하고 있으며, 도로운송에 비해 저렴한 비용으로 경제적인 운송이 가능하다는 측면에서 가치가 높다. 이러한 측면에서 본 연구는 국내 연안해운 중심성 분석을 통해 연안해운 항로 네트워크의 특성 및 중심성 변화를 살펴보는 것을 연구의 목적으로 한다. 이를 위하여 연안해운의 네트워크의 특성을 분석할 수 있는 SNA(Social Network Analysis) 분석방법을 활용하였다. 연구결과, 전라남도가 In-Degree 및 Out-Degree 모두 가장 높은 순위를 기록하며 연결 중심성이 제일 높은 것을 확인하였다. 매개 중심성은 전남이 가장 높은 순위를 보였으며, 근접 중심성의 경우 강원이 가장 높은 순위를 보였다. 허브와 권위 중심성 결과 전남이 가장 높은 순위를 기록했고, 경남, 강원 등의 순으로 높은 중심성이 도출됐다. 마지막으로, 허브 인덱스(Hub Index) 결과, 전남이 1순위로 도출됐으며, 인천, 기타지역, 강원 순으로 순위를 기록했다. 본 연구는 연안해운의 중추적인 역할을 맡고 있는 시·도 및 관련 품목을 제시하였다는 시사점이 있다. 향후 연구에서는 시·도에 속한 항만별 연구를 통해 연안해운의 흐름을 파악할 필요가 있다.

• 한국산학기술학회논문지
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• 제19권12호
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• pp.353-362
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• 2018

주기적으로 발생하는 가축전염병으로 인한 국가적 손실이 매우 크다. 또한 우리나라에서 차량이동이 가축전염병의 주요 원인인 것으로 알려져 있다. 이 같은 상황에서, 본 연구는 축산차량의 이동 네트워크에서 축산시설의 구조적 위치와 전염병의 발생 사이의 관계를 실증분석하였다. 이를 위하여 KAHIS에서 제공하는 축산차량의 시설 진입 데이터를 활용하여 축산차량 이동 네트워크를 구축하였다. 구축된 네트워크에서 시설별로 중심성 지표를 도출하고, 전염병이 발생한 시설과 비발생 시설의 지표 평균을 비교하였다. 분석결과 첫번째 가설인 "전염병 발생시설의 연결정도 중심성은 비발생 시설보다 크다."는 옳은 것으로 나타났다. 전체시점과 시점별 분석을 실시한 결과 대부분의 자료에서 가축전염병이 발생한 시설의 연결정도 중심성이 비발생 시설에 비하여 통계적으로 크게 나타났다. 두 번째 가설인 "HPAI에서 발생시설과 비발생시설 사이의 연결중심성 차이가 FMD에서의 차이보다 작다."는 전체시점 자료에서 옳은 것으로 나타났다. 반면에 시점을 나누어서 분석한 결과에서는 뚜렷한 차이를 찾을 수 없었다. 연구의 결과에 따른 정책적 시사점은 다음과 같다. 첫 번째, 연결정도 중심성에 기반한 시설의 사전 관리가 필요하다. 두 번째, 우제류 농가의 경우 연결중심성에 기반한 관리정책의 도입이 보다 시급하다.

• 한국농공학회지
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• 제44권1호
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• pp.81-92
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• 2002

The purpose of this paper, the 2nd stage of this study. is to test the applicability of the potential centrality evaluation model (PCEM) to a case study area. To verify the practical applicabilities of the PCEM, an administrative area of Ucheon-myeon, Hoengseong-gun, Gangwon-do was selected as a study area. Full data on the human environments of total 72 villages within the study area were surveyed. Data on the natural environments were collected through GIS analysis from digital maps developed far this study. The highest PCI (Potential Centrality Index) score was shown at Uhang village of which one being 841 (total score being 1,000), the real single center village of the study area. The evaluation results on potential centeralities of all the villages in the study area would provide decision-makers with more precised information for selection of center villages for development project.