• 한국HCI학회:학술대회논문집
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• 2009.02a
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• pp.1321-1329
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• 2009

Web technology has allowed the rise of services such as blogs or YouTube that make possible the sharing of opinions, perspectives, and experiences with other users through contents. Online services that promote such sharing of information and communication are known as social media. Recently, the explosive growth of these services displays the carry-over of the natural sociality that all humans possess as social creatures. This study took an exploratory approach in investigating what influential relationships are involved in forming new relationships through sharing and participation, as sharing and participation are core keywords of social media. In order to do this, relationship formations were observed in actual usage environments with the use of the diary study method and in-depth interviews. This study sought to deduce necessary elements in relationship formations and examine the influences of weak ties on participation and sharing.

• Korean Journal of Social Welfare Studies
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• v.45 no.2
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• pp.147-172
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• 2014

The purpose of this study is to analyze the cause-and-effect relationships among positive verbal expressions from family members, social network, and disability identity as the determinant factors of intention to work. To achieve the goal, 453 persons with disabilities and with experiences of using facilities for the disabled were studied, who were recruited for the national survey of domestic violence in 2010. For the research subjects, the cause-and-effect relationships among the major factors were examined by using a structural equation model. According to the results, disability identity and intent to work tended to be higher as they had experienced more of positive verbal expressions from their families. Moreover, a more participation in social activities increased disability identity, but not intent to work. Lastly, disability identity was found to be a determinant of intent to work. Based on the results, we provide suggestions to achieve social inclusion of people with disabilities by raising the intent to work.

• Journal of IKEEE
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• v.20 no.3
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• pp.235-240
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• 2016

In this study, we use the data collected from Twitter, as an SNS(Social Networking Service), for service innovation. This data was collected and processed by Flume. The data set in May 2016 was 4,766 and 15,543 from company S and company X, respectively. We were able to figure out the emotional atmosphere of the two companies through the sentiment analysis(SA) and to find out about the vertical relationship through the bibliometric analysis(BA). Furthermore, we were able to grasp the horizontal relationship through the social network analysis(SNA). It was concluded that SNS was worth while to derive an innovative item.

• Journal of KIISE:Computing Practices and Letters
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• v.16 no.4
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• pp.377-382
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• 2010

For business purposes, it is important to identify diffusion power users, a group of users who have big influence on other users in diffusing content. In this paper, we use the independent cascade model for determining diffusion power users, and to do so, we need a method for calculating the assimilation probability between users. This paper proposes the concepts of user delivery power and a way to quantifying the value of this. User delivery power is used to compute the assimilation probability with user content power. We analyze the proposed method by comparing its performance with those of existing methods through experiments using a real blog network data.

• The Journal of the Korea Contents Association
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• v.14 no.6
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• pp.93-107
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• 2014

Recently Korean film industry has continuously experienced a rapid growth and expanded its influence to foreign countries. Accordingly, there have been numerous studies in various research areas to investigate the characteristics of the industry. In this study, we applied social network analysis based on the attributes such as genres, ratings, distributors, nationalities, sizes, and profitability to divide the movies into several clusters with respect to their similarity. Results suggested that the ratings and nationality rather than the genre are the major factors to divide the motion picture market into clusters and the profitability also varies much across the clusters. Furthermore, estimation of the diffusion model showed the positive relationship between the success of a movie and the word-of-mouth effect, while the relatively unsuccessful titles exhibited a monotonic decreasing diffusion pattern with the high initial demand and the early peak time.

• Proceedings of the Korea Water Resources Association Conference
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• 2023.05a
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• pp.214-214
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• 2023

네트워크로 구성된 시스템은 물질, 에너지, 신호 등의 입력(input)이 주어졌을 때, 경로 추적, 즉 라우팅(routing)을 통해 출력(output)으로 연결되고, 이를 반응함수로 나타낼 수 있다. 같은 입력값이라도 네트워크에 따른 연결 구조와 라우팅 과정에서 소요되는 시간차에 따라 출력값이 달라질 수 있다. 좋은 예로 강우에 따른 유출반응함수를 나타내는 자연 하천망을 들 수 있다. 이론적으로 순간의 입력이 주어졌을 때 (입력의 지속시간이 0), 출력은 순간반응함수로 표현된다. 자연 하천망에 대한 선행연구에서는 강우강도에 따라 순간반응함수가 변화한다는 비선형성이 알려졌다. 하지만, 비선형성을 가져오는 물리적 과정에 대해서는 많은 연구가 필요하다. 이 연구는 격자 형태로 주어진 임의의 네트워크에서 각 격자에 대해 순간반응함수를 구하는 분포형 모형을 제시한다. 입력자료와 라우팅 방법에 따른 연결 구조 및 순간반응함수의 변화를 격자 별로 확인하고, 이를 통해 시스템의 비선형성을 고려할 수 있는지 고찰하였다.

• The Journal of the Korea Contents Association
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• v.16 no.11
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• pp.253-263
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• 2016

We analyzed the social issue 'image of the elderly' using Big Data and Social Network Analysis. First, we analyzed the words extracted by the text mining technique by inputting the keyword 'elderly'. As a result of analysis, the image of the elderly viewed through media such as cafes, blogs, etc. Representing the trend of the public was using the word 'Senior' the most. The image of the elderly is expressed using the word having the highest frequency in the top 10, "The elderly are 'Senior' people who are respected by society, they are organized to earn money, to earn their qualifications, to health, and to 'Seniors' who desire to work healthy up to 100 years old". The purpose of this study is to differentiate from the existing analysis method by analyzing the macro-level image of the elderly including the social discourse by collecting vast amount of data and analyzing it with the social networking technique. When the image of the elderly that the public perceives is positively expressed as 'Senior', it can be said that the direction of the current elderly policy is evaluated as a desirable direction. On the other hand, it was able to feel the 'desire' of the public who wanted to be evaluated. Therefore, the policy direction of the elderly to be applied in the future should be the policy that enables the elderly to be perceived as 'Necessary existence' in society by taking on social roles. In addition, we proposed to implement the policy of the elderly that reflects priorities such as job creation, welfare, and alienation that can activity and maintain health.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.36 no.6
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• pp.601-609
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• 2018

The Smart City Plan specifies that it should reflect the content of the Smart City Comprehensive Plan, which is the upper plan while presenting the basic direction, promotion strategy, service establishment and operation plans of a smart city construction project. However, there are not enough empirical studies on whether plan contents are systematically established according to smart city planning hierarchy. In this study, we are to use the social network analysis to find out the local government's smart city plan is actually highly connected to the Smart City Comprehensive Plan, a master plan at national level. To this end, we conducted a social network analysis on Gwangmyeong and Chuncheon, which were recently approved for smart city planning. First, 108 keywords were derived from the 2nd Smart City Comprehensive Plan, and the connectivity between these keywords and Smart City Planning was analyzed. The results of the social network analysis showed that the total connections of Smart City Planning in Gwangmyeong was 371, which was higher than 307 in Chuncheon, and the average degree of connection per keyword and network density were also higher in the Gwangmyeong Smart City Planning than the Chuncheon Smart City Planning. The results of the study showed that the Smart City Planning actually had a high connectivity with the Smart City Comprehensive Plan, and the keywords with high connection centrality were different for each local government. The result of this study can be used as a basis for judging whether there is a high correlation between plans.

• Journal of Korea Entertainment Industry Association
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• v.14 no.4
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• pp.169-186
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• 2020

This study selected 127 powerful Korean film producers, directors, and actors whose stable audience drawing power has been proven over the past seven years from 2013 to 2019, and viewed their network through social network analysis(SNA) to explain their power structure. It also explained the changes compared to the results of previous studies conducted on box office hits from 1998 to 2012. The producers who showed the highest audience drawing power over the past seven years were KANG Hae-jung, JANG Won-seok, LEE Eugene, HAN Jae-duk. BONG Joon-ho, KIM Yong-hwa, and RYOO Seung-wan as directors and SONG Kang-ho, HA Jung-woo, and HWANG Jung-min as actors were confirmed to exhibit the most stable audience drawing power. Meanwhile, the network formed by the 127 leading producers, filmmakers, and actors was analyzed based on closeness/ degree/eigenvector/betwenness centrality, and the result discovered a strong network involving JANG Won-seok, HAN Jae-duk, CHO Jin-woong, Don LEE, and HWANG Jung-min. This study is meaningful in that it included producers, the position which has never been discussed in previous local studies to analyze the network influencing star casting, and selected accurate box office hits by checking whether the concerned films actually reached break-even point rather than simply relying on the number of audiences or total revenue they garnered. Nonetheless, it left a hole to be filled in that it did not include the role of the management companies in the network. Therefore, a relevant follow-up discussion would be needed.

• Proceedings of the KSR Conference
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• 2011.10a
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• pp.1785-1792
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• 2011

남북분단 60년 한반도의 남북철도 역시 분단되어 왔으나 2007년 5월19일 경의선과 동해선에서 동시에 열차시험운행을 통해 단절되었던 남북철도가 다시 연결되었다. 그러나 이후 경의선 열차 운행이 잠정 중단됨으로써 남북철도 운행은 언제 깨어날지 모르는 깊은 동면에 들어갔다. 남북철도 연결은 정치 사회적인 의미를 고려하지 않더라도 남북한을 하나의 교통망으로 묶는 실질적 수단인 동시에 한반도를 대륙과 연결함으로써 고립에서 벗어날 수 있는 중요한 기회를 제공하는 도구임에 분명하다. 분단 이후 남한과 북한의 철도는 상이(相異)한 시스템을 유지해 왔고, 북한은 오랜 경제난으로 철도보수와 현대화가 뒤쳐져 있는 상황이다. 이는 남북철도가 현대사회에서 요구하는 교통수단으로 정착되기 위해서는 수많은 정책적 기술적 현안들을 해결해야 함을 의미한다. 본 고에서는 남북철도 연결에 수반되는 여러 현안 중 재원조달방안을 중심으로 1)그동안 학계에서 제안된 기존 방법론들을 조사하고, 2)최근 새로운 투자방법으로 주목받고 있는 실물옵션에 대해 설명하고, 3)이를 남북철도 개발에 적용하는 방법에 대해 다루고자 한다.