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LED Headlamp를 적용한 LHPS 냉각성능 해석
강병도(Byungdo Kang),박경석(Kyoungsuk Park),손성만(Sungman Son) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The influence of the heat sources on LED junction temperature are Engine room air, Back plate, Electric power device, and so on. LED headlamp cooling system is considered to be an important subject for high light efficiency. Because LED Chip will be problem When LED junction temperature be over 135℃. In this Study, the Looped Heat Pipe System is considered to prevent LED Chip fall. The LHPS is consist of evaporator part, condenser part, heat pipe part. The working fluid of LHPS is HCFC-123.
UCC웹사이트 서비스품질이 지각된 가치와 사용자만족에 미치는 영향
강병서,조철호 한국고객만족경영학회 2008 고객만족경영연구 Vol.10 No.2
Recently according to quantitative growth of UCC, competition is more intensive, therefore, value as well as web-site quality are considered as important factors for raising company performance. In this paper, we examined casual relationship among UCC web-site quality, value, user satisfaction and loyalty intention using research model. As a result of this, we empirically confirmed casual relationship among every theoretically possible constructs. Also, we testified and confirmed that value is important factors preceding user satisfaction and loyalty intention. The objective of this study is to explore factors affecting value and user satisfaction and to find role of value between UCC web-site quality and user satisfaction. Empirical results of this study are as follows. Firstly, it is important for relevant companies to deliver major factor such as ease of use, technique quality and entertainment. Secondly, these relevant companies should find differential service factor be suitable to themselves according to users' needs, and they should apply them in strategic marketing plan. 최근 사회적 이슈가 되고 있는 동영상 UCC와 관련 웹사이트에 대한 연구는 사회적 중요성에도 불구하고 관련 연구는 부족한 실정이다. 본 연구는 UCC웹사이트를 선택하는 속성과 그에 따른 가치와 사용자 만족도를 조사하고자 하였으며, 궁극적으로 관련기업에게 고객만족과 충성의도를 제고시킬 수 있는 방안을 마련하고자 하였다. 연구 결과, 가치를 매개로한 간접효과와 직접효과를 감안한 총 효과 측면에서 보면 오락성, 기술품질, 편리성의 순으로 사용자만족에 영향을 미치는 것으로 나타났다. 이러한 결과는 사용자의 UCC제작활동이 기술적 편리성을 추구하는 전형적인 취미 또는 오락적 성격이 강함을 발견할 수 있다. 결론적으로 UCC웹사이트 운영기업에서 가치를 고려한 서비스의 제공은 오락성, 기술품질, 편리성에 중점을 두어야 하고 신뢰성은 최소요건으로써 기본적으로 유지되어야 한다. 따라서 UCC웹사이트 운영기업들을 사용자의 니즈와 이들이 느끼는 가치를 고려하여 서비스 총 효과를 계량적으로 파악하여 이를 사용자만족을 제고하기 위한 기업전략에 적용시키는 것이 중요하다.
강병도(Byungdo Kang),이호상(Hosang Lee),박경석(Kyoungsuk Park) 한국자동차공학회 2008 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Technologies for vehicle lamps have been rapidly advanced in line with recent development of Information Technology. Advanced countries in automobile industry, for example. USA, Europe or Japan have been aware of significance of future vehicle development and thus they have invested huge research efforts in R&D to preoccupy new technologies. In accordance with these trends, development of cutting edge technologies for future vehicle research projects have been promoted, led by government since 2003. More importantly, outcome resulting from research should be reflected when the safety standards for future vehicle are established In this study, new emerging technologies and trends of international safety standard for vehicle lamps in foreign countries were investigated. In addition, need for application of these technologies to domestic safety standards were analyzed.
3상 PWM 인버터의 단일제어루프 전압제어기의 설계 및 제어
강병의(B.H. Gang),고재석(J.S. Gho),조준석(J.S. Cho),최규하(G.H. Choe),곽철훈(C.H. Kwak),김진홍(J.H. Kim) 전력전자학회 2001 전력전자학술대회 논문집 Vol.2001 No.7
There are two ways in the output voltage control method in PWM inverter. One is the double loop voltage control composed of inner current control loop and outer voltage control loop. Because it shows fast response and low steady state error, utilized in many application. The Other is single loop voltage control method composed of voltage control loop only. It's characteristics shows lower performance in case of high output impedance than double loop voltage control. But in low output impedance, it shows good control performance in all load range than double loop control.<br/> In this paper, single loop voltage control rule and gain was developed analytically, and these were verified through computer simulation and experiment.