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Pig Pluripotent Stem Cells as a Candidate for Biomedical Application
최광환,이창규 사단법인 한국동물생명공학회 2019 한국동물생명공학회지 Vol.34 No.3
Stem cells are progenitor cells that are capable of self-renewal and differentiation into various cells. Especially, pluripotent stem cells (PSCs) have in vivo and in vitro differentiation capacity into three germ layers and can proliferate infinitely. The differentiation ability of PSCs can be applied for regenerative medicine and tissue engineering. In domestic animals, their PSCs have a potential for preclinical therapy as well as the production of transgenic animals and agricultural usage such as cultured meat. Among several domestic animals, a pig is considered as an ideal model for biomedical and agricultural purposes mentioned above. In this reason, studies for pig PSCs including embryonic stem cells (ESCs), embryonic germ cells (EGCs) and induced pluripotent stem cells (iPSCs) have been conducted for decades. Therefore, this review will discuss the history of PSCs derived from various origins and recent progress in pig PSC research field.
최광환 대한설비공학회 1998 설비저널 Vol.27 No.6
우리나라의 여름 기후는 고온 다습한 특징을 갖고 있다. 고온 다습한 지역에서는 습도가 쾌적성을 결정하는데 중요한 요소가 되기 때문에, 습도가 높으면 온도가 그다지 높지 않더라도 쉽게 무더위를 느낀다. 이러한 계절적 특성을 없애 쾌적한 생활을 영위하기 위하여 생활의 질적 향상과 더불어 공조장치의 수요가 매년 두드러지게 증가하고 있다. 특히, 실내의 경우에는 공조장치 중 대표적인 에어컨(air conditioner)으로 냉방을 행함으로써 고온 다습한 여름철의 거주공간을 개선하고 있다. 그러나 고온 다습한 환경하에서의 과다한 에어컨 사용은 인체의 온열 환경적 측면에서 오히려 불리하다. 왜냐 하면, 에어컨에서는 여름철에 잠열(latent heat)을 고려해야 함에도 불구하고 단지 현열비(sensible heat factor)로 취출온도를 결정하고 있기 때문이다. 그 결과, 실내가 과다하게 냉각되어 재실자에게 불쾌감은 물론, 심지어 냉방병도 초래할 수가 있다.
최광환 한국이벤트컨벤션학회 2007 이벤트 컨벤션 연구 Vol.3 No.1
This paper was written to provide some efficient execution methods, the standards to decide upon the successfulness and failure, and the methods to a systematic accumulation of the know-how and experience of an event to set forth a theory to event. The major task to solve the above-mentioned questions is to establish the event strategy model which everyone can share and apply. As the event strategy model renders the common perspectives and decision standards, it enables to provide the standards to judge the success and failure of events and the basis for accumulating event know-hows. As a result on a persuasive communication basis, the factors that construct an ad strategy has proven to be practical to substitute in to the factors, for an event strategy model. To add, it is better in terms of efficiency to apply the distinct factors of an ad strategy on the basis of a USP Discipline on an event strategy model than applying various ad strategic models. This study is aimed that understand experience orientation of potential visitors and find relations between program preference, physical elements importance, visiting intension with experience orientation. Visitor's experience orientations not only have direct effect to visiting intension, but also have indirect effect through the program and physical elements. Therefore, all six hypotheses are adopted. The implication of this study is that must provide distinct experience according festival resource type and program specific character because experience orientation influence differently to program and festival type. I suggested operation devices on relation of the program and the physical element, and as program preference influence strongly to visiting intension, I emphasized importance of program. Also, I showed the result that have to design distinct program on each festival event type.
최광환,이준엽 한국관광학회 2010 관광학연구 Vol.34 No.3
This study examined the critical success factors of local festivals and developed variables for measuring the critical success factors. Based on the review of previous literature on the success factors of a local festival and in-depth interviews of 40 local festival specialists, 166 measurement variables were initially derived. Then 18 festival specialists closely looked at the face validity of variables two times. After these procedures, 82 variables were factor analyzed using a sample of 350 local festival planners, academics and staffs. Finally, a confirmatory factor analysis was performed to test the reliability and validity of the measurement model. Results of the confirmatory factor analysis suggested seven critical success factors of a local festival(i.e., `field management capability, locality of content, level of interest by local residents, establishment of long term vision, satisfaction level of spectators, comfort of festivals environment, validity of festival strategies) and. 22 measurement variables.