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Dispersion Polymerization 을 이용한 단분산성의 가교 Poly ( methyl methacrylate ) 입자의 제조
김진웅,서경도 ( Jin Woong Kim,Kyung Do Suh ) 한국공업화학회 1998 응용화학 Vol.2 No.1
Highly monodisperse poly(methyl methacrylate)(PMMA) microparticles crosslinked with urethane acrylates containing carboxylic groups were produced by dispersion polymerization in methanol solution. Different from conventional crosslinkers, the urethane acrylate employed as a crosslinker showed an excellent effect on maintaining the monodispersity of PMMA microparticles even in the moderate crosslinker concentration (to about 10 wt%). This was believed that the urethane acrylate helped forming the monomer-swellable surface of primary particles, because of its structurally long tetramethylene oxide groups in its molecule. However, at high concentration and low molecular weight of the urethane acrylate, bimodal distributions were observed, which was attributed to the serious increase of the crosslinking density.
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김진겸(Jin-Kyum Kim),김경진(Kyung-Jin Kim),김우석(Woo-Suk Kim),이윤혁(Yoon-Huck Lee),오관정(Kwan-Jung Oh),김진웅(Jin-Woong Kim),김동욱(Dong-Wook Kim),서영호(Young-Ho Seo) 한국방송·미디어공학회 2019 방송공학회논문지 Vol.24 No.1
This paper introduces the analysis and development of digital holographic data codec technology to effectively compress hologram data. First, the generation method and data characteristics of the hologram standard data set provided by JPEG Pleno are introduced. We analyze energy compaction according to hologram generation method using discrete wavelet transform and discrete cosine transform. The quantization efficiency according to the hologram generation method is analyzed by applying uniform quantization and non-uniform quantization. We propose a transformation method quantization method suitable for hologram generation method through transform and quantization experiments. Finally, holograms are compressed using standard compression codecs such as JPEG, JPEG2000, AVC/H.264 and HEVC/H.265 and the results are analyzed.
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청소년의 학업스트레스가 게임 과몰입에 미치는 영향: 부모-자녀 의사소통과 또래관계의 매개효과
김진웅 ( Kim Jin Woong ),홍서준 ( Hong Seo Joon ),김욱진 ( Kim Wook Jin ) 한국보건사회연구원 2020 保健社會硏究 Vol.40 No.3
This study analyzed verify the impact of teenager academic stress on game overindulgence and the dual mediating effects of parent-child communication and peer relationship in this relationship. To verify the cause of game overindulgence in the long term and causal way, the structural equation model was analyzed using the data from the 5th (2018) of the game user panel survey, and 287 middle school students, 295 high school students, and 582 teenagers who responded to the survey were sampled and analyzed. The analysis results are as follows. First, it has been confirmed that the higher the academic stress of teenagers, the more indulged they are in gaming. Second, in the relationship between academic stress and game overindulgence among teenagers, parent-child communication and peer relationships were found to have individual mediating effects, respectively. Based on the above findings, policy and practical implications were proposed on how to solve the problem of overindulgence in gaming among youths.
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지상파 방송의 공적 책무 : KBS, MBC, SBS를 중심으로
김진웅(Jin Woong Kim) 청운대학교 방송예술연구소 2008 미디어와 공연예술연구 Vol.3 No.-
본 연구에서는 공적 책무(성)에 대한 이해와 동시에 공적 책무와 지상파방송의 상호관련성에 관한 이론적, 실천적 차원의 접근을 시도하고자 한다. 방송의 공적 책무성은 무엇을 의미하는가, 공익성 공적 서비스 등은 공적 책무성과 어떻게 연관되는가, 우리나라 지상파방송이 수행해야 할 공적 책임은 어떤 것인가 등이 주요 논의의 대상이다. 특히 우리나라 3대 지상파방송, 즉 KBS, MBC, SBS를 중심으로 공적 책무가 각각 어떻게 부여되고 실현되어야 하는지 설명하려고 한다. 따라서 흔히 제기되는 지상파방송질서의 문제점을 지적하거나 비판하기 보다는 현재의 제도를 전제로 한 차원에서 방송의 책임에 관한 논의를 중심에 놓는다. 법제적 차원에서 책무규정이 좀 더 정교화 되어야 하고, 방송사 차원에서는 능동적으로 적합한 책무성의 가이드라인을 제시하는 것이 필요하다고 본다. This study examines public accountability of terrestrial broadcasters, especially KBS, MBC and SBS, in Korea, Public accountability understand a new role for public broadcasters in context of changing media environment, and is responsibility in return for the privilege of public channels. Theoretically there is close relationship between public accountability and public interest, which based on the public broadcasting system in tradition. Public accountability is a response to public ownership, public funds and public channel, and therefore includes not only public program service, public control system and active service for the audience. In practice, it can not be given to all free channels the same accountability, but different. For example, KBS has very strict public accountability, because it is based on public characteristics for ownership, financing and free channel. On the other hand belongs to the public accountability SBSs basically public service for audience included public program service. But it is very impotent for all public channels to survive in the future.
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