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조정구(Junggoo Cho) 한국예술종합학교 미술원 조형연구소 2006 Visual Vol.3 No.-
While I took a survey of the old center of Seoul: Jong-ro and Chung-gye-chun for the last few years, I realized that there is a inhabitant subject that live in the city. It adapts to the built-environment and sometimes, transforms itself, and reconstructs the built-environment in which it resides. This subject can be defined as ‘a unit of management that has a specific function and possesses space in the urban built-environment’, I named it “gigan”. Here, I intended to explain how I got to define “gigan”, the context of its definition and nature, and also show a wide variety of ways of its existence through examples. In the latter part, focusing on the relationship between “gigan” and the built environment, I tried to show the relationship between “gigan” and the general buildings, and the vitality of the buildings could be created by possession of “gigan”. And finally, in the “World without boundaries”, I tried to evaluate “gigan” as a medium that makes a unique environment in the city beyond the boundaries of possession or architectural types and also tried to reveal the value of the built environment that it reconstructs.
온라인 변압기 탭 절환에 의한 고효율 계통연계형 태양광 발전용 PCS
구태근(TaeGeun Koo),송두익(DuIk Song),조정구(JungGoo Cho) 전력전자학회 2009 전력전자학술대회 논문집 Vol.2009 No.1
본 논문은 온라인 변압기 탭 절환에 의한 계통연계형 태양광 발전용 PCS에 관한 것으로, 저주파 변압기로 구성된 절연형 PCS에서 변압기 1차 권선에 탭을 두고 태양전지 출력 전압 크기에 연동하여 탭을 절환함으로써 PCS의 출력전류를 낮게 유지할 수 있는 고효율 PCS를 제안한다. 본 논문에서는 안정적인 온라인 탭 절환과 효율향상의 타당성을 실험을 통해서 검증한다.