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- 저자 : 김창근(Chang-Geun Kim) (검색결과 118 건)
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A Hierarchical Multicast for Dynamic Adaptation to Network Congestion Status
김창근,송진국,구명모,Kim, Chang-Geun,Song, Jin-Kook,Gu, Myeong-Mo The Korea Institute of Information and Commucation 2008 한국정보통신학회논문지 Vol.12 No.8
멀티캐스트 응용에서 네트워크 혼잡상태에 동적 적응을 위한 방법으로 SARLM이 있다. 이 방법에서는 혼잡이 발생하면 혼잡지역의 전송률 감소로 인하여 비 혼잡지역에서 가용 대역폭의 낭비가 발생한다. 본 논문에서는, 네트워크 혼잡에 동적 적응을 위한 계층적 멀티캐스트를 제안한다. 제안한 방법에서는 지역마다 대표자를 선택하여 혼잡상태일 때, 전송률 감소를 방지하기 위하여 멀티캐스트 송신자로부터 전송된 패킷을 혼잡지역 대표자에게 유니캐스트로 계층적 전송하고, 혼잡지역 대표자는 지역 수신자들에게 멀티캐스트로 전송한다. 실험 결과, 제안기법이 혼잡상태에서 수신자들의 전송률을 향상시키고 가용 대역폭을 보다 더 효율적으로 이용함을 알 수 있었다. There is SARLM scheme for dynamic adaptation to network congestion status which arises from multicast applications. However, in this scheme, when congestion occurs in a local, the waste of available bandwidth occurs in non-congestion local because of reducing of transmission rate in congestion local. In this paper, we propose a hierarchical multicast for dynamic adaptation to network congestion. In proposed scheme, we select a representative in each local. while congestion status. It receives packet from multicast sender and hierarchically transmits packet to the representative in congestion status by unicast for preventing decrease of transmission rate and the representative in congestion local transmits packet to the receivers in local by multicast. In experimental results, it was known that the proposed scheme could improve transmission rate of receivers in congestion status and more efficiently used available bandwidth.
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CD-ROM화된 중화민국 국립중앙도서관의 중국서지시스템
김창근,Kim, Chang-Geun 한국도서관협회 1991 圖協會報 Vol.32 No.6
본 고는 1969년 4월 창간된 중화민국 대북시 소재 국립중앙도서관 뉴스레터인 국립중앙도서관통신 Vol. 22, No, 4(1991, 2)에 수록된 기사를 번역한 것이다. 역자는 경제수준으로 비교할 때 항상 우리나라와 경쟁관계에 있는 대만이 정보분야 정책입안과 실행에 있어서는 우리의 현실보다 훨씬 더 앞서 있다는 사실에 부러운 한편 아연해하는 심정으로 본 기사내용을 도서관계 여러분에게 보다 널리 알리고 싶어서 도서관문화의 지면을 빌어 소개하고자 합니다.
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김창근,정연홍,김일,Kim, Chang-Geun,Jung, Youn-Hong,Kim, Il 한국정보통신학회 2007 한국정보통신학회논문지 Vol.11 No.4
최근 인터넷 쇼핑몰 등을 통한 전자상거래가 증가하면서 웹페이지를 탐색하는 방문자의 관심도를 분석하여 개인화 등에 활용되는 예가 증가하고 있다. 웹사이트 방문자의 관심도 분석 방법으로는 클릭스트림 기반의 분석 방법이 이용되고 있지만, 이러한 기법은 인터넷 쇼핑 몰과 같이 많은 양의 정보를 제공하는 웹페이지의 경우에는 방문자가 어떠한 정보에 관심이 많은지에 대한분석이 어렵다. 웹페이지와 같이 많은 양의 정보를 제공하는 경우에 제한된 크기의 모니터로는 한 화면에 모든 정보를 표현하기가 어렵다. 따라서 웹페이지를 표현하는 웹브라우저는 이러한 표현의 한계를 극복하기 위하여 페이지 스크롤 기능을 제공하고 있다. 본 논문에서는 이러한 문제를 해결하기 위하여 웹브라우저 내에서 스크롤바 위치와 윈도우 커서의 움직임을 주기적으로 수집하여 사용자의 관심도를 분석하는 웹페이지 관심도 분석 시스템을 제안하고 분석 및 설계하였다. There has been increasing of using Internet shopping mall like an e-business, and it means that the analysis technique of appetence for webpase visitors logging into the case of analyzing the degree of concern and using them in the personalization has been absolutely advanced. For heavy web pages, it is impossible to use click-stream based analysis in analyzing interest for each area by what kind of information the visitors are interested in to. A web browser of a limited size has difficulty in expressing on a screen information about what they want, or what hey are looking for. Pagescrolling is used to overcome such a limitation in expression. In this study, a analyzing system of degree of concern for Webpage is presented, designed and implemented using page scrolling to track the position of the scroll bar and movements of the window cursor regularly within a window browser for real-time transfer to analyze user's interest by using information received from the analysis of the visual perception area of the web page.
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김창근(Chang-Geun Kim),김봉조(Bong-Jo Kim),이철순(Cheol-Soon Lee),이소진(So-Jin Lee),이동윤(Dongyun Lee),서지영(Ji-Yeong Seo),최재원(Jae-Won Choi),이영지(Young-Ji Lee),이윤정(Youn Jung Lee),임은지(Eunji Lim),차보석(Boseok Cha) 대한생물치료정신의학회 2021 생물치료정신의학 Vol.27 No.3
Objectives:The purpose of this study was to investigate the relationship between serum vitamin D concentration and resilience in patients hospitalized with bipolar disorder. Methods:Serum vitamin D levels were measured on day 1 of hospitalization in 64 patients with bipolar disorder, who were diagnosed according to the Diagnostic and Statistical Manual of Mental Disorders, 4th Edition. The Connor-Davidson Resilience Scale and the Korean version of the Inventory for Depressive Symptomatology (KIDS) were administered to these patients, and symptoms of mania were evaluated using the Young Mania Rating Scale (YMRS). Patients were then categorized into vitamin D sufficient and deficient groups based on a serum vitamin D cut-off of 20 ng/mL. Analysis of covariance (ANCOVA) was performed to compare the resilience between the two groups, and multiple linear regression was performed to determine the association between serum vitamin D levels and resilience. Results:The vitamin D deficiency group had more depressive episodes than the sufficient group (p<0.05). ANCOVA showed that the vitamin D deficient group had significantly lower resilience scores than the sufficient group (p= 0.034). Moreover, multiple regression analyses conducted by controlling age, sex, body mass index, season of blood sampling, KIDS scores, and YMRS scores, showed a significant association between serum vitamin D concentration and resilience in patients with bipolar disorder (p=0.001). Conclusions:This study suggested that vitamin D deficiency is associated with resilience as a protective factor against stress and trauma in patients with bipolar disorder. Further research is warranted to determine the causal relationship between vitamin D levels and resilience.
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김창근 ( Chang Geun Kim ) 한국윤리학회 2014 倫理硏究 Vol.96 No.1
This article will critically evaluate the view of ‘our way’ on human rights of North Korea and suggest implications for unification education, based on the three issues on universality of human rights. Unification education should not be affected by logical opposition or ideological conflict surrounding the human rights issues in North Korea. The Implications based on serious understanding on the ‘Universality of human rights’ should be foundation of unification education. On the basis of univerality and historicity of human rights, we shall be able to evaluate about mistakes of the viewpoint on human rights of North Korea. North Korea`s self-rescue efforts are clearly limited. We should have an interest in human rights issues of Korth Korea and be involved wisely. Through unification education, the importance of internal and external social solidarity for the improvement of human rights in north korea should be paid attention and building and expanding of human rights culture should be emphasized. As the recent discussion on ‘Responsibility to Protect’(R2P) has shown, the importance of international human rights norms that constrain national sovereignty is increasingly being magnified. Unification education should contribute to expand the framework of human rights discourse. The situations of human rights in North Korea is not fatefully involved in cultural relativism. We need to find practical meaning of human rights and the role of unification education while checking and applying the values on human rights of the universality of human rights.
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