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골프중계방송 해설자의 공신력, 시청만족, 재시청 의도간의 관계 연구
이용건(Yong Gun Lee),이정학(Jeoung Hak Lee),이민섭(Min Seob Lee),박영민(Young Min Park) 한국사회체육학회 2011 한국사회체육학회지 Vol.0 No.45
The purpose of this study was to offer basic empirical data about golf broadcasting to elevate the standard of quality by understanding public trust of commentator in golf broadcasting and identifying their satisfaction with watching TV and intention to re-watch. To achieve this purpose, subjects were selected among or from the customers using golf driving ranges and screen-golf club in Seoul and Gyeonggi area. Total of 348 surveys were distributed and 307 samples were used as final validity sample. The data was analyzed by frequency analysis, reliability analysis, exploratory factor analysis, correlation analysis, simple and multiple regression in accordance with the purpose of the study by using SPSS Version 17.0. Following results were obtained from above analysis. First, building public trust of golf commentator from broadcasting station(expertise, reliability, dynamic, popularity factor)was shown to have a statistically significant influence on the viewers satisfaction. Second, viewers satisfaction was shown to have statistically significant influence on the intention to re-watch. Third, for the public trust of golf commentator from broadcasting station, expertise and dynamic factor were shown to have a statistically significant influence on the intention to re-watch.
유재영,이명노,조용건,Yoo, Jae-Young,Lee, Myung-Noh,Jo, Yong-Gun 한국정보통신학회 2010 한국정보통신학회논문지 Vol.14 No.9
본 논문에서는 효율적이고 효과적인 정보 흐름을 가능하게 해주는 네트워크와 네트워크의 잠재력에 집중하고자 한다. 네트워크 중심 환경하에서 운용되는 군 지휘 통제 시스템을 포함하는 모든 네트워크들은 복잡하게 얽혀있다. 따라서 복잡도의 특성을 이해하고, 그에 따른 효과는 무엇이며, 어떻게 측정할 수 있을지에 대해서 알아본다. 우리는 정보의 접근성에 의한 효과와 네트워크화에 기반하는 중복성에 의한 효과에 대해서 결과를 제시하였다. We focus on the network itself and its ability to enable efficient and effective information flow. All networks are complex to a greater degree, including military command and control systems operating in a network-centric environment. It requires to understand the nature of complexity, what its effects are, and how to quantify them. In this paper, we present the beneficial effects of information accessibility and network-based redundancy into a single metric.
염료감응형 태양전지에서의 고분자 전해질 종류에 따른 이온전도도와의 상호관계
차시영(Cha, Si-Young),김수진(Kim, Su-Jin),이용건(Lee, Yong-Gun),강용수(Kang, Yong-Soo) 한국신재생에너지학회 2007 한국신재생에너지학회 학술대회논문집 Vol.2007 No.11
Poly(ethylene glycol) dimethyl ether (PEGDME)/fumed silica/ 1-methyl -3-propylimidazolium iodide (MPII)/I₂ mixtures were used as polymer electrolytes in solid state dye-sensitized solar cells (DSSCs). The contents of MPII were changed and the concentration of I₂ was fixed at 0.1 mole% with respect to the MPII. The maximum ionic conductivity was obtained at [EG]:[MPII]:[I₂]=10:1.5:0.15. It was supposed that the maximum of ionic conductivities would match with that of cell efficiencies, if the ionic conductivity is a rate determining step in the sol id state DSSCs. However, the maximum composition did not show the maximum solar cell performance, indicating the mismatch between ionic conductivity and cell performance. This suggests that the ionic conductivity may not be the rate controlling step in determining the cell efficiency in these experimental conditions, whereas other parameters such as the electron recombination might play an important role. Thus, we tried to modify the surface of the TiO₂ particles by coating a thin metal oxide such as Al₂O₃ or Nb₂O<sub>5</sub> layer to prevent electron recombination. As a result, the maximum of the cell efficiency was shifted to that of the ionic conductivity. The peak shifts were also attempted to be explained by the diffusion coefficient and the lifetime of electrons in the TiO₂ layer.
MFI형 제올라이트 분리막을 이용한 에틸벤젠/파라자일렌 분리에 대한 연구
이기천 ( Gi Cheon Lee ),전유권 ( Yu Kwon Jeon ),주영환 ( Young Hwan Chu ),최성환 ( Seong Hwan Choi ),서영종 ( Young Jong Seo ),설용건 ( Yong Gun Shul ) 한국화학공학회 2013 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.51 No.4
본 연구에서는 물리적 특성이 유사한 에틸벤젠과 파라자일렌의 혼합물을 분리하고자 MFI형 제올라이트(TS-1, ZSM-5, Silicalite-1) 분리막을 제조하였으며 이를 이용하여 기상에서 분리 실험을 진행하였다. 제올라이트 입자가 코팅된 분리막을 제조함에 있어서 마이크로웨이브 합성 방법을 사용하여 합성 시간을 단축하였으며, 500 nm 내외의 균일한 입자를 튜브타입의 지지체 막에 안착시켜 제올라이트 입자가 3∼4 μm두께로 치밀하게 코팅된 분리막을 제조하였다. 제조한 분리막으로 에틸벤젠/파라자일렌 혼합물 원료의 혼합비를 변경하여 투과 분리한 결과 에틸벤젠:파라자일렌=5:5 비율에서 가장 높은 분리도를 가짐을 알 수 있었다. 세 종류의 서로 다른 제올라이트 물질(TS-1, ZSM-5, Silicalite-1)을 각각 코팅하여 제조된 분리막을 이용하여 160∼220℃의 실험온도에서 에틸벤젠/파라자일렌을 투과 실험을 실시한 결과, TS-1 분리막이 1,666 mol/m2*s*Pa의 가장 높은 투과 플럭스를, Silicalite-1 분리막이 1.73의 가장 높은 분리도를 200℃의 온도에서 각각 보임을 확인할 수 있었다. Ethylbenzene (EB) which has a similar physical properties with p-xylene (pX) was separated from EB/pX mixture by using MFI-type zeolite (TS-1, ZSM-5, and Silicalite-1) coated membranes. The zeolites were synthesized by microwave method to reduce the synthesis time and uniformly formed zeolite particles were coated on the α-almina tubular support with a thickness of 3-4 μm. Separation factor and permeation flux of the synthesized zeolite coated membranes were measured to survey the best performance of ethylbenzene separation from different composition of EB/pX mixtures. When the EB/pX mixture of 5:5 molar ratio applied for the separation experiment, it represented the highest separation factor. We also have studied about the effect of the atomic composition of zeolites on the separation performance within the temperature range from 160 to 220℃. TS-1 showed the highest permeation flux of 1,666 mol/㎡*s*Pa and Silicate-1 showed the highest separation factor of 1.73 at 200℃ respectively.
다중물리 유한요소해석에 의한 SiC 단결정의 용액성장 공정 설계
윤지영,이명현,서원선,설용건,정성민,Yoon, Ji-Young,Lee, Myung-Hyun,Seo, Won-Seon,Shul, Yong-Gun,Jeong, Seong-Min 한국결정성장학회 2016 한국결정성장학회지 Vol.26 No.1
용액성장법에 의한 SiC 단결정 성장은 Si 또는 Si-금속합금의 융액으로부터 SiC를 성장시키는 방법으로서, 통상의 상부종자 용액성장법(Top Seeded Solution Growth)에서는 Si 융액을 담는 흑연도가니로부터 C가 Si 융액에 용해되고 용해된 C이 상부에 위치한 종자결정으로 이동하여 종자결정상에 SiC 형태로 재결정화하는 단계를 거쳐 SiC의 단결정을 성장시키는 과정을 거치게 된다. SiC 용액성장에 있어서는 SiC의 단결정성장을 위하여 흑연도가니의 형상, 크기, 재질 및 상대적 위치 배열 등 온도제어와 유체흐름 제어를 위해 다양한 공정변수를 선정해야한다. 본 연구에서는 용액성장공정의 설계를 위해 상용의 유한요소해석 패키지인 COMSOL Multiphysics를 이용하여 전자기장해석, 열전달해석, 유체해석에 대한 다중물리해석모델을 구축하고 이 모델을 이용하여 결정성장공정을 설계하였다. 해석결과에 기초하여 2 inch off-axis 4H-SiC 단결정을 종자결정으로 적용하여 $1700^{\circ}C$에서 상부종자 용액성장법에 의하여 SiC 단결정을 성장시켰다. 광학현미경 및 고분해능 X선회절분석을 통해 결정성을 분석한 결과 해당 성장조건에서 양호한 품질의 단결정이 성장함을 확인하였다. 이로써 본 연구에서 구축된 다중물리해석모델이 SiC의 용액성장 공정설계에 유효함을 확인하였다. A top-seeded solution growth (TSSG) is a method of growing SiC single crystal from the Si melt dissolved the carbon. In this study, multiphysics modeling was conducted using COMSOL Multiphysics, a commercialized finite element analysis package, to get analytic results about electromagnetic analysis, heat transfer and fluid flow in the Si melt. Experimental results showed good agreements with simulation data, which supports the validity of the simulation model. Based on the understanding about solution growth of SiC and our set-up, crystal growth was conducted on off-axis 4H-SiC seed crystal in the temperature range of $1600{\sim}1800^{\circ}C$. The grown layer showed good crystal quality confirmed with optical microscopy and high resolution X-ray diffraction, which also demonstrates the effectiveness of the multiphysics model to find a process condition of solution growth of SiC single crystal.
김선영(Kim, Sun-Young),전라선(Jeon, La-Sun),이용건(Lee, Yong-Gun),강용수(Kang, Yong-Soo) 한국신재생에너지학회 2007 한국신재생에너지학회 학술대회논문집 Vol.2007 No.11
Supramolecules containing double hydrogen bonding sites at their both chain ends were self-polymerized to become solid state polymer and were utilized to improve the efficiency of solid state DSSCs. Hydrogen bonding sites were attached at the chain ends of PEG of Mw=2000, such as pyrimethamine and glutaric acid. The solar cell with the solid state supramolecular polymer electrolyte resulted in the overall energy conversion efficiency of 4.63 % with a short circuit current density (J_{sc}) of 10.41 mAcm^{-2}, an open circuit voltage V_{oc}, of 0.71 V and a fill factor (FF) of 0.62 at one sun condition ([oligomer]:[1-methyl-3-propyl imidazolium iodide (MPII)]:[I₂] = 20 : 1 : 0.19, active area = 0.16 cm², TiO₂ layer thickness = 10 {mu}m). The ionic conductivity of the sol id state electrolyte was 5.11{times}10^{-4} (S/cm). The cell performance was characterized by electrochemical impedance spectroscopy and ionic conductivity.