• Title, Summary, Keyword: 매개 중심성

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Analysis of Seoul Metropolitan Subway Network Characteristics Using Network Centrality Measures (네트워크 중심성 지표를 이용한 서울 수도권 지하철망 특성 분석)

  • Lee, Jeong Won;Lee, Kang Won
    • Journal of the Korean Society for Railway
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    • v.20 no.3
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    • pp.413-422
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    • 2017
  • In this study we investigate the importance of the subway station using network centrality measures. For centrality measures, we have used betweenness centrality, closeness centrality, and degree centrality. A new measure called weighted betweenness centrality is proposed, that combines both traditional betweenness centrality and passenger flow between stations. Through correlation analysis and power-law analysis of passenger flow on the Seoul metropolitan subway network, we have shown that weighted betweenness centrality is a meaningful and practical measure. We have also shown that passenger flow between any two stations follows a highly skewed power-law distribution.

The Effects of Port Decentralization on Port Management and Port Development : The Mediating Effect of Port Site Centrality (항만 분권이 항만경영 및 항만개발에 미치는 영향 : 항만 현장 중심성의 매개효과)

  • Yang, Hang-Jin;Jung, Doo-Sig
    • Journal of Digital Convergence
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    • v.17 no.9
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    • pp.61-70
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    • 2019
  • This study was intended to analyze the effect of port decentralization on port management and port development, analyze whether port site centrality has mediated effect in relation between port decentralization and port management and port development. This study surveyed public officials and researchers who plan and execute port policies, and analyzed the influence relationship of variables and the mediating effect using multiple regression analysis. Results are as follows, First, it was analyzed that the port authority decentralization and regional-centered port policy have a positive influence on the port site centrality, and the port authority decentralization has a positive influence on port management and port development. Second, the port site centrality was confirmed to have a positive influence on port management and port development. Third, port site centrality was shown to mediate the relationship between port decentralization and port management and port development. This study suggested the positive effect of port decentralization to local government on efficient port management and port development, and the need to draw up port site-oriented policies.

Mediating Effect of Decentering between Centrality of Event and Meaning Reconstruction on Relational Loss Experience (관계상실경험자의 사건중심성과 의미재구성의 관계: 탈중심화의 매개효과)

  • Kim, Soon-Me;Lee, Su-Lim
    • The Journal of the Korea Contents Association
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    • v.20 no.6
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    • pp.445-459
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    • 2020
  • The purpose of this study was to verify the mediating effect of decentering between centrality of event and meaning reconstruction, based on relational loss experiences. To do so, surveys were conducted on 295 people(male: 109, female: 186) who would experience relational loss and be over 20 years old in the country using a questionnaire including a relational loss history checklist, the CES(Centrality of Event Scale), the Decentering Scale and the GMRI(Grief and Meaning Reconstruction Inventory). And the valid data were statistically processed using SPSS 22.0 program. The results of the study was followed. First, both centrality of event and decentering had positive corrleations with meaning reconstruction. Second, decentering completely mediated relationship of centrality of event and meaning reconstruction. Centrality of event had no direct effect on meaning reconstruction and the entire effect of centrality of event on meaning reconstruction was transmitted only through the path of decentering. Based on these results, limitations and implications of this study and suggestions for future studies were discussed.

The mediating effect of the structure supply chain orientation and the customer-oriented supply chain performance on the path between the supply chain orientation and the export performance in manufacturing SMEs (중소 제조기업의 공급사슬지향성과 수출성과의 경로에서 구조적 공급사슬지향성과 고객중심 공급사슬 성과의 매개효과)

  • Cho, Yeon-Sung
    • International Area Studies Review
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    • v.18 no.3
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    • pp.89-110
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    • 2014
  • This study build an integrated model of a relationship between the supply chain orientation(SCO), the performance of a supply chain management(SCM) and an export performance in a domestic manufacturing SMEs. Twelves hypotheses including the mediating effect of the structural SCO and the customer-focused performance of SCM were analyzed on the 212 SMEs. In the result of the analysis, the strategic SCO has a positive effect on the both of the SCO and the operational performance of the SCM. The structural SCO has a positive effect on the performance of the SCM. Also, the operational performance of the SCM has a positive effect on the export performance of SMEs. In the mediating effect, the structural SCO has a fully mediating effect between the strategic SCO and the customer-focused performance of SCM. In addition, it has a partial mediating effect on the relationship of the strategic SCO and the operational performance of the SCM. The operational performance of the SCM has a fully mediating effect between the structural SCO and the customer-focused performance of SCM.

Exploring Impact of Individual Network Position toward Knowledge Sharing Intention (개인의 네트워크 위치가 지식공유 의도에 미치는 영향에 관한 탐색적 연구)

  • Bae, Soonhan;Baek, SeungIk
    • The Journal of Society for e-Business Studies
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    • v.21 no.3
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    • pp.29-50
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    • 2016
  • We explore the impact of individuals'network position toward knowledge sharing intention. In order to identify network positions, we utilize three centrality measures (degree/closeness/betweenness) of individual network participants. The research findings show that the individual network positions significantly affect knowledge sharing intentions. Since an individual with high degree centrality might be the leader or the hub, one makes considerable effort to maintain the network position by actively participating in intra-team and inter-team knowledge sharing, A participant who can quickly interact with many other participants within a team (high closeness centrality) is more interested in intra-team knowledge sharing than inter-team knowledge sharing. Unlike degree centrality and closeness centrality, the betweenness centrality provides a participant with diverse resources located in multiple sub-groups. Although an individual with high betweenness centrality is not at the center of the networks, one plays a crucial role in disseminating and regulating information. Therefore, the individual is likely to have more positive intention toward inter-team knowledge sharing than intra-team knowledge sharing.

A Comparative Study on the Centrality Measures for Analyzing Research Collaboration Networks (공동연구 네트워크 분석을 위한 중심성 지수에 대한 비교 연구)

  • Lee, Jae Yun
    • Journal of the Korean Society for information Management
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    • v.31 no.3
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    • pp.153-179
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    • 2014
  • This study explores the characteristics of centrality measures for analyzing researchers' impact and structural positions in research collaboration networks. We investigate four binary network centrality measures (degree centrality, closeness centrality, betweenness centrality, and PageRank), and seven existing weighted network centrality measures (triangle betweenness centrality, mean association, weighted PageRank, collaboration h-index, collaboration hs-index, complex degree centrality, and c-index) for research collaboration networks. And we propose SSR, which is a new weighted centrality measure for collaboration networks. Using research collaboration data from three different research domains including architecture, library and information science, and marketing, the above twelve centrality measures are calculated and compared each other. Results indicate that the weighted network centrality measures are needed to consider collaboration strength as well as collaboration range in research collaboration networks. We also recommend that when considering both collaboration strength and range, it is appropriate to apply triangle betweenness centrality and SSR to investigate global centrality and local centrality in collaboration networks.

Author Co-citation Network Analysis Using Triangle Betweenness Centrality Measure (중심성 척도 TBC를 이용한 저자동시인용 네트워크 분석)

  • Lee, Jae-Yun
    • Proceedings of the Korean Society for Information Management Conference
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    • pp.357-364
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    • 2005
  • 저자동시인용 자료에 대한 분석 도구로 삼각매개중심성 (triangle betweenness centrality; TBC) 척도를 비롯하여 네 가지 새로운 척도를 제안하고 정보학 분야의 지적 구조 분석에 적용해보았다. 제안한 척도는 사회네트워크 분석 분야에서 사용되고 있는 여러 중심성 척도를 참고하여 동시인용 데이터에 적합하도륵 고안되었다. 검증을 위해서 이은숙, 정영미(2002)의 연구에서 수집한 1990년부터2000년까지 11년간 Journal of America Society for Information Science에 인용된 주요 저자50명의 동시인용 네트워크를 여러 중심성 척도를 사용해서 분석하였다. 전통적인 분석 도구인 다차원척도법이나 군집분석과 달리 중심성 척도를 통해서는 저작물에 반영된 개별 저자의 입지와 영향력에 대한 구체적인 분석이 가능하였다. 특히 삼각매개중심성 척도는 측정 범위의 조절이 자유로와서 지역적 중심성과 전역적 중심성을 모두 파악할 수 있는 것으로 나타났다.

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A Comparison Study on the Weighted Network Centrality Measures of tnet and WNET (tnet과 WNET의 가중 네트워크 중심성 지수 비교 연구)

  • Lee, Jae Yun
    • Journal of the Korean Society for information Management
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    • v.30 no.4
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    • pp.241-264
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    • 2013
  • This study compared and analyzed weighted network centrality measures supported by Opsahl's tnet and Lee's WNET, which are free softwares for weighted network analysis. Three node centrality measures including weighted degree, weighted closeness, and weighted betweenness are supported by tnet, and four node centrality measures including nearest neighbor centrality, mean association, mean profile association, triangle betweenness centrality are supported by WNET. An experimental analysis carried out on artificial network data showed tnet's high sensitiveness on linear transformations of link weights, however, WNET's centrality measures were insensitive to linear transformations. Seven centrality measures from both tools, tnet and WNET, were calculated on six real network datasets. The results showed the characteristics of weighted network centrality measures of tnet and WNET, and the relationships between them were also discussed.

A Study on the Application to Network Analysis on the Importance of Author Keyword based on the Position of Keyword (학술논문의 저자키워드 출현순서에 따른 저자키워드 중요도 측정을 위한 네트워크 분석방법의 적용에 관한 연구)

  • Kwon, Sun-Young
    • Journal of the Korean Society for information Management
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    • v.31 no.2
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    • pp.121-142
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    • 2014
  • This study aims to investigate the importance of author keyword with analysis the position of author keyword in journal. In the first stage, an analysis was carried out on the position of author keyword. We examined the importance of author keyword by using degree centrality, closeness centrality, betweenness centrality, eigenvector centrality and effective size of structural hole. In the next stage, We performed analysis on correlation between network centrality measures and the position of author keyword. The result of correlation analysis on network centrality measures and the position of author keyword shows that there are the more significant areas of the result of the correlation analysis on degree centrality, betweenness centrality and the position of keyword. In addition, These results show that we need to consider that the possible way as measuring the importance of author keyword in journal is not only a term frequency but also degree centrality and betweenness centrality.

A Study on the Research Trend Analysis of AEO Certification System through SNA Analysis (SNA분석을 통한 AEO 인증제도 연구동향 분석에 관한 연구)

  • Kim, Jin-Wook;Yang, Tae-Hyeon;Kim, Dong-Myung;Yeo, Gi-Tae
    • Journal of Digital Convergence
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    • v.18 no.2
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    • pp.47-56
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    • 2020
  • The purpose of this study was to identify the research trends and characteristics of existing research related to the AEO system. The methodology of the study was to utilize the Degree Centrality, Closeness Centrality and Betweenness Centrality presented by the Social Network Analysis (SNA). Keyword network analysis results showed that "MRA", "Logistics Security" were derived from the Degree Centrality results, "MRA", "Logistics Security" from the Closeness Centrality results, and, as a result of the Betweenness Centrality, "AEO Utilization Benefits" and "reliability" were derived from the top keyword results. The analysis of differences in centrality by period also confirmed that trends in research have changed based on specific time points. This study has implications for the study in that it presented worldwide research trends through keyword network analysis of the AEO system.