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김명규(Myeong Gyu Kim),이창준(Chang Jun Lee),홍아름(Ah Reum Hong) 한국정보사회학회 2016 정보사회와 미디어 Vol.17 No.1
본 연구는 미디어의 본질인 ‘정보 전달’의 측면에서 효과적인 정보 확산 방법에 대한 연구이다. 특별히 미디어가 직접 이용자에게 정보를 전달하는 것보다 의견지도자라는 매개체를 통해 정보를 전달하는 것이 더 효과적이라는 2단계 유통이론을 기반으로, 미디어의 환경 변화를 반영한 온라인 의견지도력 측정 변수를 정립하여, 온라인 의견지도자를 식별하고 그들의 미디어 이용 패턴을 분석하였다. 요인분석을 이용하여 기존 연구를 바탕으로 새롭게 정의한 온라인 의견지도력 측정 변수를 정립하고, CART 분류 분석을 이용하여 온라인 의견지도력 중 유사한 미디어 이용 패턴을 보이는 자들을 집단화(clustering)하였으며, 미디어 레퍼토리를 유형화하여 미디어 이용 패턴을 분석하였다. 또한, 온라인 의견지도자의 내적, 외적 특성을 통해 기존 의견지도자와의 구분을 시도함으로써 온라인 의견지도자 그룹의 미디어레퍼토리 유형 형태의 차이점이 존재함을 밝혀냈다. 더 나아가, 온라인 의견지도자와 비의견지도자 그룹 간의 미디어 이용 형태를 미디어-시간, 콘텐츠-시간에 따라 분석하였으며, 마지막으로 미디어-콘텐츠-시간 3범주기준을 제시하고 온라인 의견지도자의 미디어 이용 형태를 분석하였다. 본 연구의 결과를 통해 정보 확산 매개체인 의견지도자들의 미디어 이용 패턴 분석을 통해 효과적인 정보 확산을 위한 함의를 제공하고 정보 공급자들에게 효과적인 정보 확산을 위한 미디어 레퍼토리 기반의 미디어 전략을 제안한다. This paper aims to analyze media utilization pattern of the online opinion leader who has an effect in information diffusion. There is a study ‘the two-step flow of communication theory’ about the effect of media related to information diffusion. This study says information delivery through opinion leader is more effective than direct delivery to user. In this perspective, opinion leader can be important medium to effective information diffusion. This paper focuses on 2 main ideas. One is to discern online opinion leader with online opinion leadership’s measuring variables reflected media environment change. The other is to analyze media utilization pattern of the online opinion leader. ‘2013 and 2012 Korea Media Panel Survey’ from KISDI(Korea Information Society Development Institute) is well-fitted data for this study. This data offer personality, media and contents use based on situation variables like ‘when’, ‘where’ and ‘what’. Using KISDI data, the new measuring variables for online opinion leadership are constructed by the factor analysis. The CART algorithm which is one of the classification tools in data-mining is used to classify online opinion leader group has similar media utilization pattern(media repertoires) based on calculated opinion leadership of sample. Then this paper analyzes online opinion leader group’s media use based on media-content-time. Through this analysis, we can investigate the media repertoires of online opinion leader and detailed media utilization pattern based on 3 categories. Using the results, we can take implications to information provider like companies and government for effective information diffusion strategy. Especially for companies, this paper can give implications for media and content strategy in product and service marketing.
이창준,심훈구,김운천,이송희,박형숙,Lee, Chang Jun,Sim, Hun Gu,Kim, Un Cheon,Lee, Song Hui,Park, Hyeong Suk Korean Chemical Society 2000 Bulletin of the Korean Chemical Society Vol.21 No.4
We present the results of computer simulation for the steady shear flows of rodlike molecules using nonequi-librium molecular dynamics simulation (NEMD) method. The model particle is a rigid rod composed of lin-early connected 6-sites and the Lennard-Jones 12-6 potential governs interactions between sites in different molecules. The system of rodlike molecules exhibits the change of orientational structure, that is, isotropic-nematic transition at high shear rates. We elucidate the nature of the ordered system developed from an isotro-pic phase by steady shear through an analysis of various quantities: orientational order parameters, orientational pair correlation functions, orientational distribution function, and snapshots of configurations. The effects of temperature and density on the shear rate dependence of orientational structure are described.
이창준(Chang-Jun Lee),이재성(Jae-Sung Lee),권기영(Ki-Yeoung Kweon),이승구(Seung-Kuh Lee),이영호(Young-Ho Lee) 한국유체기계학회 2006 유체기계 연구개발 발표회 논문집 Vol.- No.-
The present study aimed at clarifying unsteady flow characteristics of the industrial motors. High- resolution CCD camera(2k×2k, ES 4.0) and Nd-YAG laser are adopted to clarify flow characteristics of the motor. Quantitative velocity distribution and related flow information is presented and macro flow structure, generated via the motor axis and the cooling fan, also is investigated. Moreover, from the velocity field data, discharge flow rate through the air duct is compared at each measuring sections.
이창준,심훈구,김운춘,이송희,박형숙,Lee, Chang Jun,Sim, Hun Gu,Kim, Un Chun,Lee, Song Hui,Park, Hyeong Suk Korean Chemical Society 2000 Bulletin of the Korean Chemical Society Vol.21 No.3
Molecular dynamics simulation studies for thermotropic liquid crystalline systems conposed of rodlike molecules with 6 Lennard-Jones interaction sites wre performed in NPT ensemble. Within the range of temperature studied, the system exhibited isotropic and smectic phase. For the characterization of the smectic phase, we examined the structure of the liquid crystalline phase via the radial distribution function, its longitudinal and transverse components to the director, and other orientational correlation function, its longitudinal and transverse components to the director, and other orientational correlation functions. In the smectic A phase, our results showed a large anisotropy in translational motion (i.e.,$D_⊥ >> D_∥$), and the decay of the collective orientational correlation function of rank two became slower than that of the single particle orientational correlation function of rank one. Comments on the spontaneous growth of orientational order directly from the isotropic phase are given.