• 한국시스템다이내믹스연구
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• 제16권2호
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• pp.33-52
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• 2015

This study aims to comprehensively understand the dynamics of the community network of Community Child Centers and further find out the measures to activate its community network based on the Systems Thinking. The contents of the study are as follows. Firstly, it examines the existing studies on the community network of Community Child Centers and presents the major variables to understand the situation of its community network. Secondly, it analyzes the structure of its causation in order to understand the dynamics of its community network. Lastly, it concludes with the suggestions to activate its community network based on its feedback structure presented in the causal loop diagrams. This study is expected to make a useful and basic material as the first research to dynamically understand the community network issue of the Community Child Centers.

• 지식경영연구
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• 제12권2호
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• pp.69-80
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• 2011

This paper reports on a structural view of a knowledge network comprised of clubs and organisationsexpressly concerned with cultural activities in a regional Australian city. Social network analysis showed an uneven distribution of power, influence, and prominence in the network. The network structure consisted of two modules of vertices clustered around particular categories of creative arts and these modules were linked most frequently by several organisations acting as communication hubs and boundary spanners. The implications of the findings include 'network weaving' for improving the network structure and developing a systemic approach for exploring the structures of social action that form community-based knowledge networks.

• International Journal of Computer Science & Network Security
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• 제23권7호
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• pp.219-230
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• 2023

Wireless Body Area Networks (WBANs) have made it easier for healthcare workers and patients to monitor patients' status continuously in real time. WBANs have complex and diverse network structures; thus, management and control can be challenging. Therefore, considering emerging Software-defined networks (SDN) with WBANs is a promising technology since SDN implements a new network management and design approach. The SDN concept is used in this study to create more adaptable and dynamic network architectures for WBANs. The study focuses on comparing the performance of two SDN controllers, POX and Ryu, using Mininet, an open-source simulation tool, to construct network topologies. The performance of the controllers is evaluated based on bandwidth, throughput, and round-trip time metrics for networks using an OpenFlow switch with sixteen nodes and a controller for each topology. The study finds that the choice of network controller can significantly impact network performance and suggests that monitoring network performance indicators is crucial for optimizing network performance. The project provides valuable insights into the performance of SDN-based WBANs using POX and Ryu controllers and highlights the importance of selecting the appropriate network controller for a given network architecture.

• 보건교육건강증진학회지
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• 제26권3호
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• pp.35-48
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• 2009

Objectives: The community network is a foundation laid by the local community which has been formed historically and geographically to develop itself. This paper as a Korean way of healthy network survey for the community capacity building is an exploratory research to grasp the character of Korean society and then to organize an resident-governing partnership for that. Methods: Research objectives are CBOs(Community-Based Organizations) in S-district of Seoul. This region is a new town, however the solidarity and volunteerism of this resident is lively. The survey tool is Cho's CBOs Evaluation Questionnaire which was originated to measure the community capacity. The period of survey is from the January 2009 to the March 2009 and the study organizations which were collected by snowball sampling were 80. Results: The result shows two main networks: one is the civil society and craft union cluster, the other is welfare organization cluster. Groups of high centrality were organizations whose members are mainly women and craft organizations which were organized before 1990's. The group of high betweenness was the Association of Women's Organizations(0.188). Bi-components were six and they could be divided by organization's aim. In terms of the determinants of the participation to the health center enterprise, only the number of link(B=-0.60, p<0.04) was statistically significant. It means that when organization variables are controlled a tendency appears: the more the voluntary associations network, the less participation in the health enterprise. Conclusion: CBHOs(Community-Based Health Organizations) enhances residents' spontaneity and cohesion to increase the capability of the local community. If the surveyed healthy network, together the community health project, are used for various community development projects, the existing CBOs including CBHOs will be reorganized and furthered newly. For this it will be needed to construct an effective partnership of healthy network by restructuring the existing networks of voluntary associations.

• Journal of Information Processing Systems
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• 제10권2호
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• pp.271-282
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• 2014

The advancement of knowledge society has enabled the social network community (SNC) to be perceived as another space for learning where individuals produce, share, and apply content in self-directed ways. The content generated within social networks provides information of value for the participants in real time. Thus, this study proposes the social network community activity-based content model (SoACo Model), which takes SNC-based activities and embodies them within learning objects. The SoACo Model consists of content objects, aggregation levels, and information models. Content objects are composed of relationship-building elements, including real-time, changeable activities such as making friends, and participation-activity elements such as "Liking" specific content. Aggregation levels apply one of three granularity levels considering the reusability of elements: activity assets, real-time, changeable learning objects, and content. The SoACo Model is meaningful because it transforms SNC-based activities into learning objects for learning and teaching activities and applies to learning management systems since they organize activities -- such as tweets from Twitter -- depending on the teacher's intention.

• 한국콘텐츠학회논문지
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• 제16권5호
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• pp.720-731
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• 2016

본 연구는 마을공동체미디어의 관계와 소통 구조를 이해하기 위하여 네트워크 분석방법을 통해 커뮤니티 미디어 참여자 네트워크의 관계망 특성을 분석하였다. 연구대상으로 서울시 마포구의 마포FM을 선정하였으며 네트워크 분석 방법에 기초하여 마포 FM의 생산자를 중심으로 형성되어 있는 참여자들의 네트워크의 밀도와 네트워크 중심성을 분석하였다. 또한 분석 결과의 해석과 이해를 위하여 추가적으로 참여자에 대한 심층 인터뷰 실시하였다. 분석 결과, 마포FM은 지역 활동가를 중심으로 하는 마을공동체 조직가의 역할을 수행하고 있으나 일반 주민들의 참여의 정도와 소통 방식은 이론적 논의와는 달리 낮은 밀도와 소수에 집중되어 있는 낮은 수준의 관계성을 보여주고 있었다. 이러한 결과의 원인과 배경을 이해하기 위하여 참여자 네트워크에 포함된 활동가들의 심층 인터뷰 자료를 분석하고 이를 바탕으로 국내 커뮤니티미디어가 공동체와 그 구성원을 위한 콘텐츠의 생산과 공유를 어떻게 진작 시킬 것인지를 논의하였다.

• 대한전자공학회논문지TC
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• 제47권1호
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• pp.91-98
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• 2010

본 논문은 커뮤니티 기반의 유비쿼터스 네트워크에서 대리 서명 기법을 적용한 커뮤니티 멤버들 간의 상호 인증 기법 및 안전한 커뮤니티 생성 권한 위임 기법을 제안한다. 커뮤니티 기반의 유비쿼터스 네트워크에서는 사용자가 필요로 하는 네트워크 서비스 및 응용서비스를 제공해주기 위해 다양한 상황인식 정보가 수집 되고 활용된다. 또한 사용자는 학업, 게임, 정보 공유, 사업, 회의 등의 다양한 목적에 의해 다양한 커뮤니티를 생성할 수 있다. 그러나 커뮤니티 기반의 유비쿼터스 네트워크의 경우 공격자에 의해 상황인식 정보가 위조 및 도용되어 악의적인 목적으로 사용될 수 있다. 또한 악의적인 목적으로 커뮤니티를 생성할 수 있다. 제안하는 기법은 위임 서명 기법을 이용하여 커뮤니티 멤버들 간의 상호 인증 및 비밀 키를 교환 할 수 있도록 지원하고, 안전하게 커뮤니티 생성 권한을 위임할 수 있도록 하였다. 또한 기존 RSA 서명 기법과의 비교 분석을 통해 전체 계산 시간이 감소함을 확인하였다.

• 응용통계연구
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• 제29권4호
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• pp.719-728
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• 2016

본 연구에서는 한국과 미국의 사물 인터넷 관련 특허 초록을 수집하여 키워드 네트워크 및 키워드 커뮤니티 네트워크를 구축하고 네트워크 분석을 실시하였다. 먼저 TF-IDF 가중치를 적용하여 중요 키워드를 추출하고 이 중요 키워드와 상관관계가 높은 키워드들을 재추출하여 핵심 키워드를 선정하였다. 선정된 키워드를 중심으로 키워드 네트워크를 구축한 다음 네트워크 탐지를 시행하여 키워드 커뮤니티 네트워크를 재구축하여 기술 간의 연결 관계를 분석하였다. 본 연구에서 생성한 키워드 커뮤니티 네트워크는 특허의 내용을 예측할 수 있을 뿐만 아니라 커뮤니티 간의 연결 관계를 분석함으로써 기술 간의 연관 관계도 파악할 수 있다. 키워드 커뮤니티 네트워크 분석 결과 한국은 보안, 반도체, 이미지 프로세스와 같은 사물 인터넷의 기반 기술 분야의 특허가 중요한 특허 기술로 나타난 반면 미국의 경우 스마트 홈, 대화형 매체 그리고 통신 등과 같은 사물 인터넷 환경, 응용 분야의 기술이 중요한 기술로서 자리잡고 있음을 알 수 있다.

• 환경생물
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• 제36권3호
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• pp.370-376
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• 2018

It is important to consider interaction between species in understanding structure and function of the biological community. Current ecological issues such as climate change and habitat loss emphasize the significance of the concept of species interaction in that varying species' interaction across environmental gradients may lead to altered ecological function and services. However, most community studies have focused on species diversity through analysis of quantitative indices based on species composition and abundance data without considering species interactions in the community. 'Ecological network analysis' based on network theory enables exploration of structural and functional properties of ecosystems composed of various species and their interactions. In this paper, network analysis of Cheonggye stream as a case study was presented to promote uses of network analysis on ecological studies in Korea. Cheonggye stream has a simple biological structure with link density of 1.48, connectance 0.07, generality 4.43, and vulnerability 1.94. The ecological network analysis can be used to provide ecological interpretations of domestic long-term monitoring data and can contribute to conserving and managing species diversity in ecosystems.

• 농촌계획
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• 제23권2호
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• pp.9-17
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• 2017

Rural development policy has changed from hardware based development to community revitalization. The purpose of this study is to analyze social network of collaborative activity among rural organizations as fundamental of community. The material used in this study is a record of collaborative activites in the community newsletter of Hong-Dong area. 161 of collaborative activities (links) and 75 of organizations (nodes) are investigated in network. 6 collaborative activity type ('Education', 'Socializing', 'Meeting', 'Culture', 'Event' and 'Labor') is classified. 'Socializing' is inclusive of approximately half of whole network (50.67%). Closeness centraization, degree centralization and betweenness centralization are measured on top in 'Education', 'Meeting' and 'Event' type. Scatter plot analysis using degree and betweenness centrality index, 'Maeul Revitalization Center', 'Balmak Library', 'Woori-Maeul Medical Co-op', 'Support Center for Female Farmers', 'Hongdong Middle School' and 'Mundang Sustainable Agriculture Education Center' are resulted as the core organization in network. Geographical distribution of collaborative activity is not only concentated in Hong-Dong Myeon but also networked with adjacent administrative district. This study finds its purpose in the detailed analysis of network characteristics of collaborative activity within Hong-Dong area which is representative developed rural community in Korea.