• 제목/요약/키워드: 근접중심성 분석

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A Comparative Analysis Study of IFLA School Library Guidelines Using Semantic Network Analysis (언어 네트워크 분석을 통한 IFLA의 학교도서관 가이드라인 비교·분석에 관한 연구)

  • Lee, Byeong-Kee
    • Journal of Korean Library and Information Science Society
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    • v.51 no.2
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    • pp.1-21
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    • 2020
  • The purpose of this study is to explore semantic characteristics of IFLA school library guidelines through network analysis. There are two versions, 2002 edition and 2015 revision of the guidelines. This study analyzed the 2002 edition and 2015 revision of the IFLA school library guidelines view point of semantic network, and compared characteristics of two versions. The keywords were to extracted from two texts, semantic network were composed based on co-occurrence relations with keywords. The centrality(degree centrality, closeness centrality, betweenness centrality) was analyzed from the network. In addition, this study conducted topic modeling analysis using LDA function of NetMiner4.0. The result of this study is following these. First, When comparing the centrality, the 'Program, Teaching, Reading, Inquiry, Literacy, Media' keyword was higher in the 2015 revision than in the 2002 edition. Second, 'Inquiry' in degree centrality and 'Achievement' in closeness centrality which were not included in the 2002 edition top-ranked keyword list, have new appeared in 2015 revision. third, As a result of the analysis of topic modeling, compared to the 2002 version, the importance of topics on programs and services, teaching and learning activities of librarian teacher, and media and information literacy is increasing in the 2015 revision.

Research Trend Analysis of Publications in the Journal of Home Economics Education Association Using Network Text Analysis (네트워크 텍스트 분석을 이용한 한국가정과교육학회지 논문의 연구 동향 분석)

  • Lee, Yoon-Jung;Kim, Eun Jeung;Kim, Ji sun
    • Journal of Korean Home Economics Education Association
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    • v.31 no.4
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    • pp.1-18
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    • 2019
  • The purpose of this study was to analyze the research trend in home economics education using network text analysis method. The 586 research articles published in the Journal of Home Economics Education Association between July, 2003 and December 2018 were examined using Neckinger 4, a social network analysis software. The frequency and centrality measures(degree centrality, closeness centrality, and betweenness centrality) were calculated for the words appeared throughout the whole period, and the centrality analysis and LAD(Latent Dirichlet Allocation) were conducted for the four sub-periods. The results are as follows: first, the most frequently appeared words are parents, culture, unit, health, career, consumption, practicality, etc. The words such as parents and management scored high in degree centrality; parents and male students in closeness centrality; and male students and units in betweenness centrality. Second, when divided into four periods, the words such as education, family, purpose, class, middle school, and school appeared most frequently across the periods; but some words such as 'purpose' (in period 3 and 4), or 'process' (in period 4) were salient only in certain periods. Third, the words with high centrality were consistent regardless of the types of centrality within each period. Fourth, the topic analysis using LAD showed that curriculum, textbook, family healthiness, teaching-learning, evaluation, dietary life, appearance management, and consumption were the topics consistently appeared across all periods. The topics have become diversified and deepened. New topics such as teacher training and safety appeared in later periods, possibly due to the curriculum and national policy changes, and housing as a less represented topic is suggested as an area that needs further research attention. This study has implication in that it allows researchers to identify the major research interests and the trends in research by researchers in home economic education.

A Study on Analysis of Container Liner Service Routes Pattern Using Social Network Analysis : Focused on Busan Port (사회연결망 분석을 이용한 컨테이너 정기선 항로 패턴 분석에 관한 연구 : 부산항을 중심으로)

  • Ryu, Ki-Jin;Nam, Hyung-Sik;Jo, Sang-Ho;Ryoo, Dong-Keun
    • Journal of Navigation and Port Research
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    • v.42 no.6
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    • pp.529-538
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    • 2018
  • The port industry is an important national industry which significantly affects Korea's imports and exports which are centered on economic structure. For instance, the Port of Busan, which handles 75% of domestic container freight volume, is expected to become increasingly critical for container liner routes. For this reason, there have been continued efforts to expand freight service to attract international freight volume. This study analyzes the structural characteristics of the port network connected to the Port of Busan by analyzing the pattern of the container liner route from 2012 to 2016 by using social network analysis. According to the Port of Busan's liner route network, the port with the highest degree of centrality, closeness centrality, and betweenness centrality was found to be the Port of Singapore. The comparison of Busan's annual container handling rank by countries and the port center network analysis of Port of Busan rank was found to be different. As a result, it was established that China's East Port, which occupies a high percentage of the volume of cargo handled by Port of Busan, is not a hub port of Busan when viewed on the Busan's container terminal liner network. In addition, even if the number of Port of Busan container liner service increases, it is estimated that the vessels to be added to the fleet will be limited to small to medium sized, or that Busan port has characteristic of a feeder port for the Port of Singapore, according to the network.

Research Trends of Microplastic in Food via Centrality Analysis Method (중심성 분석을 이용한 식품 미세플라스틱의 최근 연구동향)

  • Cho, Sung-Yong;Byun, Ki-sik
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.21 no.5
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    • pp.508-515
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    • 2020
  • This study examined the research trends of "Microplastic in food" with a scholar databaseusing the centrality analysis method. The data was based on research papers published from 2011 to 2020, sorted by "microplastic" and "food". The centrality analysis methodology(Degree centrality, Closeness centrality, Betweenness centrality) was applied, followed by a keyword-based frequency occurrence analysis. The results suggested that more than 30% of the total keywords were related to "marine" and "pollution". Therefore, research on the effects of microplastic pollution on the ecosystem had mainly been conducted. On the other hand, only 6% of the keywords were related to "toxicity" and "ingestion". Hence,the number of studies on microplastic exposure caused by bioaccumulation or food are still insufficient. These results can be used to provide directions for future research, as well as provide basic data for political decision-making on the environmental hazards of microplastic.

한국주가지수(韓國株價指數) 수익률(收益率)의 변동특성(變動特性)에 관한 연구(硏究) - R/S 분석을 중심으로 -

  • Yu, Seong-Hui;Kim, Sang-Rak
    • The Korean Journal of Financial Management
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    • v.14 no.3
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    • pp.183-201
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    • 1997
  • 본 논문은 우리나라의 주가지수수익률의 변동특성이 카오스를 내재하고 있는지 아니면 랜덤과정을 따르는지를 분석하기 위하여 Hurst의 R/S분석을 중심으로 분석하였다. 우리나라 증권시장의 1980년 1월 5일부터 1996년 말까지 총 4,982일 동안의 일별종합주가지수를 대수수익률로 전환한 시계열자료로 R/S분석한 결과 안정성과 주기유무를 판별하는 V-통계량 그래프에 의하면 83일과 33일의 비주기적 순환을 나타내고 있음을 알 수 있었다. 이러한 분석결과는 가우시안 랜덤과정과 그다지 큰 차이가 나지 않음을 알 수 있었다. 또한 선형성을 제거한 ARMA잔차와 비선형성을 제거한 GARCHM잔차자료에 대한 R/S분석한 결과도 원래 시계열보다 더 가우시안 랜덤과정에 더 근접함을 알 수 있었다. 한편 총 10개의 대리자료를 만들어서 평균을 취한 값으로 분석한 결과도 마찬가지로 나타나고 있다. 일별주가지수수익률에 내재하는 선형성분을 ARMA과정에 의정에 제거하고 남은 잔차중에는 비선형성분이 여전히 잔존하는데 그것이 일부 GARCHM과정에 의해서 미미하고 가우시안 랜덤과정이 보다 크게 나타남을 알 수 있었다.

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Trends on Development of Network Capacity in LTE-Advanced to Support Increasing Mobile Data Traffic (모바일 데이터 수용을 위한 LTE-Advanced에서의 네트워크 용량 증대 기술개발 동향)

  • Park, Y.J.;Park, A.S.;Kang, S.Y.;Kim, Y.K.;Ryu, S.
    • Electronics and Telecommunications Trends
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    • v.27 no.1
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    • pp.122-135
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    • 2012
  • 최근 스마트폰의 급격한 보급과 음성 위주의 이동통신 서비스가 무선 멀티미디어 콘텐츠를 중심으로 하는 데이터 위주의 서비스로 전환됨에 따라 모바일 데이터가 급증하고 있다. 그러나, LTE에서의 Macro-BS(eNB) 기반의 point-to-point 링크의 스펙트럼 효율은 이미 이론적 한계치에 근접하여 저전력의 소규모 기지국 노드를 채용하는 이종망 환경을 도입하는 노력이 3GPP를 중심으로 전개되고 있다. 본고에서는 급증하는 모바일 트래픽 수요를 수용하기 위해 개발되고 있는 소규모 저전력 셀 기반의 HetNet 기술개발 동향과 대용량의 모바일 콘텐츠를 이동통신 단말기의 근접성을 기반으로 기지국 트래픽 부하 없이 제공하기 위해 개발되고 있는 단말기 간 직접 통신 기술 개발현황을 소개한다.

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Wireless LAN Based Proximity-Aware Mobile Service (무선랜 기반 근접인식 모바일 서비스)

  • Lee, J.H.;Park, C.B.;Ryu, C.;Kim, Y.H.;Bang, S.C.
    • Electronics and Telecommunications Trends
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    • v.28 no.2
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    • pp.38-49
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    • 2013
  • 본고에서는 무선랜 기반 근접인식(proximity awareness) 모바일 서비스 제공에 필요한 관련 기술 동향 및 표준현황을 정리한다. 특히 수많은 기기들이 산재하는 모바일 D2D(Device to Device) 통신환경에서 인접 장치 및 서비스 발견 과정에 사용자 개입을 최소화할 수 있도록 접속 대상을 보고 선택하는 방식의 시선통신(look-and-link)과 네트워크 계층의 접속 이전에 주변 디바이스에서 제공되는 서비스를 미리 파악하거나 간단한 정보를 송수신할 수 있는 무결합 메시징(preassociation messaging) 연구동향을 소개한다. 이러한 기술은 셀룰러 중심의 기존 모바일 서비스들과 차별성을 가지며 무선랜 기술을 활용하는 D2D 환경에서 근접인식 모바일 서비스를 활성화할 수 있는 핵심 요소기술로 이용될 것이다.

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Exploring Treatment Collaboration Network Characteristics: Focusing on 'A' University Hospital in Seoul (진료 협업 네트워크 특성에 대한 탐색: 서울 소재 A 대학병원 중심으로)

  • Song, Hye Ji;Park, Ji-Hong
    • Journal of the Korean Society for information Management
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    • v.37 no.2
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    • pp.71-93
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    • 2020
  • Today, in order to more effectively cope with the emergence of various diseases and the rapidly-changing medical environment, several medical departments are conducting treatment collaborations within the university hospital. This collaborative care is very important and is already common in the medical field. Nevertheless, there is no research on this, especially how the departments are collaborating. Therefore, the purpose of this study is to investigate how the characteristics of the treatment collaboration networks vary by year and season by exploring the relationship between the medical departments within the university hospital. This study analyzed the collaboration networks of 29 medical departments of 'A' university in Korea by dividing the collaborative care by year and season. Directed networks were constructed in response to departments requesting and departments requested for collaborative care. Betweenness centrality, eigenvector centrality, closeness centrality analysis, ego network analysis, and faction analysis were also conducted. This study performed the first treatment collaboration network analysis among medical departments, and is expected to present new insights into the location and spatial composition of medical departments in consideration of the knowledge transfer paths within medical institutions.

Analysis of Domestic SNA-based Governance Study Trends (소셜네트워크분석을 통한 국내 거버넌스 연구 동향 분석)

  • Kim, Na-Rang;Choi, Hyung-Rim;Lee, Taihun
    • Journal of Digital Convergence
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    • v.16 no.7
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    • pp.35-45
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    • 2018
  • Research on the establishment of new governance aimed at efficient policy planning and the implementation thereof by the government has been conducted in response to social changes. Nonetheless, governance is comprehensive and encompasses different meanings; it takes various forms in the process of its actual application. Therefore, systematic classification of research on governance and analysis on its research trend are required. Accordingly, three researchers who majored in policy sciences, business informatics, and library and information science, respectively, searched for theses related to governance published since 2016 from Research Information Sharing Service and conducted a social network analysis (SNA) on them. According to their research results, the main research topics were largely classified into collaborative governance and local governance. Keywords throughout the topics included network, participation, conflict, and trust in line with the characteristics of governance. Representative subjects of governance included education, urban regeneration, and the environment. Further, measurement of betweenness centrality showed local governance was a main topic for convergent research. This study will lead to a greater understanding of research on governance and help activate such research. One limitation of this study is that it analyzed only theses with the keywords but not all theses on governance. Follow-up research should analyze all theses on governance and statistically verify them with SNA indexes.

A study on integration of semantic topic based Knowledge model (의미적 토픽 기반 지식모델의 통합에 관한 연구)

  • Chun, Seung-Su;Lee, Sang-Jin;Bae, Sang-Tea
    • Proceedings of the Korean Information Science Society Conference
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    • 2012.06b
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    • pp.181-183
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    • 2012
  • 최근 자연어 및 정형언어 처리, 인공지능 알고리즘 등을 활용한 효율적인 의미 기반 지식모델의 생성과 분석 방법이 제시되고 있다. 이러한 의미 기반 지식모델은 효율적 의사결정트리(Decision Making Tree)와 특정 상황에 대한 체계적인 문제해결(Problem Solving) 경로 분석에 활용된다. 특히 다양한 복잡계 및 사회 연계망 분석에 있어 정적 지표 생성과 회귀 분석, 행위적 모델을 통한 추이분석, 거시예측을 지원하는 모의실험(Simulation) 모형의 기반이 된다. 본 연구에서는 이러한 의미 기반 지식모델을 통합에 있어 텍스트 마이닝을 통해 도출된 토픽(Topic) 모델 간 통합 방법과 정형적 알고리즘을 제시한다. 이를 위해 먼저, 텍스트 마이닝을 통해 도출되는 키워드 맵을 동치적 지식맵으로 변환하고 이를 의미적 지식모델로 통합하는 방법을 설명한다. 또한 키워드 맵으로부터 유의미한 토픽 맵을 투영하는 방법과 의미적 동치 모델을 유도하는 알고리즘을 제안한다. 통합된 의미 기반 지식모델은 토픽 간의 구조적 규칙과 정도 중심성, 근접 중심성, 매개 중심성 등 관계적 의미분석이 가능하며 대규모 비정형 문서의 의미 분석과 활용에 실질적인 기반 연구가 될 수 있다.