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- 저자 : 김종기(Jong-Ki Kim) (검색결과 146 건)
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레이저 다이오드를 이용한 고형암 치료를 위한 간질성 광역학 치료법 개발
김종기,김기홍,Kim Jong-Ki,Kim Ki-Hong 한국의학물리학회 2005 의학물리 Vol.16 No.2
Photodynamic therapy (PDT) is one of the expectable current cure operation methods. Tumor tissue is treated by abundant oxygen in a body and generated singlet or free radical from exterior laser diode and photosensitizer. Current problem of PDT is the low penetration power of the light beam in a deep seated large tumor and solid tumor thus results in low treatment outcome. In the study, we tried to develop interstitial photodynamics therapy treatment to solve this problem. As the accurate determination of light dosimetry in biological tissue is one of the most important factors affecting the effectiveness of PDT, parameters used in this study are the optical property of biological tissue. Since biological tissues have large scattering coefficient to visible light the penetration depth of a biological tissue in visible light region is only $15\~20$ mm. We showed that it is possible to measure fluence rate and penetration depth within the biological tissues by Monte Carlo simulation very well. Based on the MC simulation study, the effectiveness of interstitial photodynamic therapy on tumor control in solid tumor was proved through in vivo animal experiment.
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SPI 신뢰성 확보를 위한 SPICE 기반 6시그마 적용 사례 연구
김종기,서장훈,박명규,Kim Jong-Ki,Seo Jang-Hoon,Park Myeong-Kyu 대한안전경영과학회 2005 대한안전경영과학회지 Vol.7 No.4
The international SPICE (Software Process Improvement and Capability determination) Project ISO/IEC 15504(SPICE : Software Process Improvement and Capability determination) is an emerging International Standard on SPA(Software Process Assessment). A prime motivation for developing this standard has been the perceived need for an internationally recognized software process assessment framework that pulls together the existing public and proprietary models and methods. A SPICE assessment can be considered as one of representative SPA model since assessors assign ratings to indicators and metrics to measure the capability of software process. But this models doesn't provide a systematic measurement procedures and dynamic method for SPI(Software Process Improvement). Through the evaluation of SPICE is capable of providing a substantiated basis for using the notion of capability, as well as providing information for nacessary improvements to the standard using 6sigma process. As a result, this paper propose a measurement procedure and guidelines for application of 6sigma process to guarantee the reliability in SPI and suggest the structure to support SPI on overall organization.
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김종기,양재호,Kim, Jong-Ki,Yang, Jae-Ho 한국해양바이오학회 2007 한국해양바이오학회지 Vol.2 No.4
High quality of purified alginate and fucoidan is required for the medical uses to prevent the unexpected side effects from the contaminated endotoxin present in the materials. We attempted to establish an efficient and fast mass scale production method for the highly purified poly-G alginate from the sea weeds. In addition, lab scale method was established to obtain the fraction of higher purity from the commercially available fucoidan source (about 85% purity).
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김종기(Kim Jong Ki),김용규(Kim Yong Kyu),이준호(Lee Jun Ho),김백현(Kim Back Hyun),신덕호(Shin Duck Ho),이기서(Lee Gey Seo) 한국철도학회 2006 한국철도학회 학술발표대회논문집 Vol.- No.-
The signalling systems, which are currently used in Urban Transit, are mostly using track_circuit based train control systems. However, as the development of radio communication technology, the radio communication technology based train control systems (of railway systems) are developed. In addition, the relevant studies are promoted in many countries. In this paper, "Track circuit Based Train Control" system and "Communication Based Train Control" system will be studied.
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SNS에서의 그룹 형성이 정보공유 활동에 미치는 영향에 관한 연구
김종기 ( Jong Ki Kim ),김진성 ( Jin Sung Kim ) 한국정보시스템학회 2013 情報시스템硏究 Vol.22 No.2
By virtue of the development and widespread of social network services, the importance of SNS for an individual`s social capital formation as well as people`s act of sharing information is increasingly highlighted. However, there are still few empirical studies on successful formation of SNS, people`s attitude towards participation in SNS, and the brisk act of sharing information in the SNS as yet. This study performed an analysis that, in terms of forming the successful SNS, people`s attachment to the group in SNS induces the attitude towards the participation in SNS, and the information-sharing act on the basis of the socio-psychological theory. For this purpose, this study carried out empirical study by dividing the influential factors into the attachment to online group, and attachment to the members in SNS group on the basis of trust. This study set up the component factors in trust as high-dimensional factors, and used SPSS 18.0 and Smart PLS 2.0 as analysis tools. Analysis results confirmed that group formation in SNS and people`s attachment to the group were significantly influence attitude towards participation in SNS as well as information sharing behavior. This result implies that group formation in SNS plays an important role in active use of SNS.
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사회적 자본과 개인 동기가 정보공유와 커뮤니티 촉진에 미치는 영향: 중국의 가상커뮤니티를 중심으로
김종기 ( Jong Ki Kim ),대상 ( Shuang Dai ),김재현 ( Jea Hyun Kim ) 한국정보시스템학회 2016 情報시스템硏究 Vol.25 No.1
Purpose Virtual communities change the way people communicate and share information. The purpose of this paper is to find how internet social capital and individual motivations influence the information sharing in virtual communities. This study considers the social capital theory, individual motivations, information sharing, and community promotion to construct a theoretical model. Design/methodology/approach Social capital focuses on three dimensions that include 6 factors: social interaction ties, centrality, shared language, shared vision, trust and reciprocity. Individual motivations include 2 factors: reputation and enjoy helping. To confirm the research model and the hypotheses, 426 effective questionnaires were used for the final analysis. Findings The result of data analysis demonstrates that social interaction ties, centrality, shared language, trust, and reciprocity were significant in affecting information sharing behaviors. However, reputation, enjoy helping, and shared vision does not appear to have a significant influence on information sharing behaviors. The information sharing was positively related to community promotion.
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