• Proceedings of the Korea Information Processing Society Conference
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• 2014.04a
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• pp.967-970
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• 2014

인터넷 게시판이나 트위터 같은 온라인 매체는 쉬운 접근성과 실시간 특성으로 어떤 사건에 대한 사용자들의 반응이 즉각적으로 나타난다. 또한, 실시간으로 엄청난 양의 데이터가 생성되고 있어 이 데이터를 잘 분석한다면 실제 사회에서 나타나는 다양한 현상들에 대해 파악할 수 있다. 최근 주식 시장에서도 이러한 온라인 데이터들을 분석하여 주가 변동이나 주식 시장 상황을 이해하려는 연구가 시도되고 있다. 이 논문에서는 주식 토론방의 게시물과 주가 사이에 어떤 상관관계가 있는지를 분석하고, 이를 이용한 주식 투자 종목 추천 시스템을 제안하고자 한다. 먼저 주가와 주식 토론방 게시물들 사이의 상관관계를 분석하기 위해서 KOSPI200에 속한 회사 중 55개의 회사를 대상으로 주가와 주식 토론방 게시물을 분석하였다. 2008년부터 2013년까지 6년 동안 각 회사의 주가와 게시물의 상관관계를 분석한 결과 개별 주가와 게시물 수 사이에는 특별한 상관관계가 나타나지 않았다. 하지만 주가와 게시물 수의 상관관계가 높을수록 주식 수익률이 높은 경향을 보였다. 이 논문에서는 주가와 게시물 수의 상관관계 정보를 이용한 투자 종목 추천 알고리즘을 제안하였고, 모의투자 실험을 통해 제안 방법의 효율성을 보였다. 2008년 1월부터 2013년 12월까지의 주가와 주식 토론방 데이터를 이용한 모의투자 실험에서 제안 방법으로 구성한 포트폴리오의 1개월 평균 수익률은 약 1.82%로, 주식 네트워크 특성을 이용한 기존 방법보다 약 0.64% 높은 수익률을 보였다. 또한, 마코위츠의 효율적 포트폴리오와 KOSPI200 수익률보다 각각 약 0.85%와 1.48% 높게 나타났다.

• Korean Journal of Social Welfare
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• v.62 no.1
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• pp.391-415
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• 2010

Recently, there were some welfare embezzlement cases of public social workers. The purpose of this study is to explore public perceptions of public social workers by analysing the comments named "datgeul" in the internet media discussion rooms("toronbang") about welfare embezzlement cases of public social workers. The results show that the main discourse about public social workers to perform a dual role as the public servants and social workers on the front line of public social welfare is that they are the victims of both a public official system and welfare administration system. In addition, social workers in public sphere are still recognized as service personnels with sacrifice and commitment rather than as professionals. Finally, the implications of this study were discussed to improve public perceptions of social welfare professionals.

• KIPS Transactions on Software and Data Engineering
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• v.3 no.10
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• pp.441-450
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• 2014

The stock market is constantly changing and sometimes the stock prices unaccountably plummet or surge. So, the stock market is recognized as a complex system and the change on the stock prices is unpredictable. Recently, many researchers try to understand the stock market as the network among individual stocks and to find a clue about the change of the stock prices from big data being created in real time from Internet. We focus on the correlation between the stock prices and the human interactions in Internet especially in the stock message boards. To uncover this correlation, we collected and investigated the articles concerning with 57 target companies, members of KOSPI200. From the analysis result, we found that there is no significant correlation between the stock prices and the article volume, but the strength of correlation between the article volume and the stock prices is relevant to the stock return. We propose a new method for recommending stock portfolio base on the result of our analysis. According to the simulated investment test using the article data from the stock message boards in 'Daum' portal site, the returns of our portfolio is about 1.55% per month, which is about 0.72% and 1.21% higher than that of the Markowitz's efficient portfolio and that of the KOSPI average respectively. Also, the case using the data from 'Naver' portal site, the stock returns of our proposed portfolio is about 0.90%, which is 0.35%, 0.40%, and 0.58% higher than those of our previous portfolio, Markowitz's efficient portfolio, and KOSPI average respectively. This study presents that collective human behavior on Internet stock message board can be much helpful to understand the stock market and the correlation between the stock price and the collective human behavior can be used to invest in stocks.

• Korean Architects
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• no.1 s.429
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• pp.51-63
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• 2005

을유년 새해가 밝았다. 우리 협회도 올해로써 불혹의 나이에 접어들었다. 인생으로 치면 황금기를 맞은 것이다. 그러나 회장의 불신임, 감사의 사퇴 등 얼룩진 여파가 지금도 계속되고 있는가 하면 원칙이나 냉철한 손익분석도 없이 지엽적인 것 때문에 중앙제와 연합제가 소용돌이치고 있는 현실이다. 40년간 20여분의 회장이 재임하였다. 굳이 이들의 개인별 평가를 하지 않더라도 협회의 성장과 쇠락, 단결과 분열 등은 회장의 철학과 리더십에 기인한다는 것은 보편적 사실이다. 이제 한 달 후면 새로운 회장을 선임하게 되고 대행체제의 막을 내린다. 다시는 이러한 일이 없도록 하기 위하여, 좀 더 나은 내일의 협회를 위하여 우리 협회의 이상적인 회장상을 그려보는 특집을 마련하였다. 지면상 많은 분의 글을 싣지는 못하였으나 우리 협회를 관심 있게 지켜보는 외부 인사를 포함하여 서울과 지방 등 다양한 의견을 듣고자 하였다. 입후보 예정자들은 이들의 바람과 스스로를 비견하여 진퇴를 명확히 해야 할 것이고, 회원들은 인터넷을 통한 협회 회원 토론방에 활발한 자기 의견을 개진해 줄 것을 당부한다. 그리하여 대의원들은 지역, 학교, 친불친을 떠나 회원들이 원하는 회장에 가장 가까운 후보자에게 투표해야 할 것이다. 이번 특집이 좀 더 나은 협회의 내일을 여는데 조금이라도 기여하기를 바란다.

• Journal of the Korean Society for information Management
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• v.29 no.3
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• pp.61-77
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• 2012

This study investigated what web users share on a health website and how the demographic characteristics of users reflect health information sharing behavior. By using a content analysis method, this study analyzed 1,042 randomly chosen messages in the discussion board of a health website. The results revealed that the health website users emotionally supported other users, provided health information, and built relationships between them. Two third of the health website users shared his/her thoughts or feelings about ALS (Lou Gehrig's Disease) on the health website and one fourth of the health website users connected with others who had ALS. A half of the users actively provided information as a direct response to a question. No significant differences were discerned with regard to total posting frequency by age and gender effect. However, the male users in the 50s answered questions to others more actively and tried to manage their life better than the other age groups.

• International Commerce and Information Review
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• v.3 no.2
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• pp.93-111
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• 2001

The purpose of this paper is to study the mechanism of Acquisition of Customer Knowledge through Web Site at Global Electronic Commerce Times in Korea. The major findings of this paper is that the models of inter-business alliance network for EC based on contents, types of participating company, categories of business of participating company, modes of alliances, and concentrated industry or function are various and complex. Therefore all companies should know this result and reflect in their business strategy.

• Archives of design research
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• v.18 no.4 s.62
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• pp.25-34
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• 2005

The purpose of the present study is to investigate the characteristics of the current Victorian-style interior by reviewing the basic Victorian-style house in the past. this research was analyzed various prior studies and literatures, and found the following results: First, the Victorian-style house and interior space showed various historical trends and adopted every style from Gothic to rococo, and sometimes more than one style influenced a single place. Its formality was applied depending on the function and standard of each room. Second, the interior had many decorative things with free, irregular or other patterns, influenced by Romanticism and Naturalism. The several environmental factors such as air pollution and hygienic matter were also related with its trend. the dramatic changes in the kitchen and sanitary facilities were appeared based on the technical development, and affluent design styles were also used. All these reflected the characteristics of the Victorian age. In conclusion, the characteristics of Victorian-style were influenced by many factors including: (a) the trend of Romanticism and Naturalism, (b) consideration of family convenience based on the technical development, (c) the Socio-Environmental factors like air pollution and the social norm, and (d) reflection of the individual value in accordance with frequent contacts with foreign cultures. In this respect, it is necessary to reevaluate the Victorian-style after paying due regard to such factors.