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벽의 역사적 고찰을 통한 공간의 변화에 관한 연구 - 공간 배열로서 평면적 사고에서 구성으로서 단면적사고로의 전환을 중심으로 -
유현석(Yoo, Hyeon-Seok),구영민(Koo, Young-Min) 대한건축학회 2019 대한건축학회 학술발표대회 논문집 Vol.39 No.2
The study departs from a historical investigation on the changes of role and meaning of the wall that defines the space as the basic substance of architecture. Based on the fact that the modern architectural space made conceptual and ideological changes from Le Corbusier"s “Domino” theory, this study attempts to redefine the interrelationship between walls and space as a theoretical and historical consideration that changes in perception of walls differentiated from classical architecture have transformed from the planar thinking of ‘arrangement’ of space to the sectional thinking of ‘composition’.
교육공학적 측면에서 본 국내 건축 기초디자인교육의 특성에 관한 연구 - 교육공학이론의 교수설계를 중심으로 -
유현석(Yoo, Hyeon-Seok),구영민(Koo, Young-Min) 대한건축학회 2019 대한건축학회 학술발표대회 논문집 Vol.39 No.2
Most of the design professors, except full-time professors at educational institutions, have rarely received professional training as educators, not architects, but the impact on the students as educators is infinite. The success or failure is often determined by ability and guidance. The purpose of this study is to analyze the current status of architectural basic design education in Korean universities and to grasp the characteristics of pedagogical aspects, and to draw implications for domestic architectural education. As part of the researcher"s long-term research, we will use it as the basic data for the subsequent research, which is to develop a basic design education program through spatial composition experiments.
양극산화 기법으로 제조한 TiO2 나노튜브의 촉매 도핑 연구 동향
유현석 ( Hyeon Seok Yoo ),최진섭 ( Jin Sub Choi ) 한국공업화학회 2015 공업화학 Vol.26 No.2
전기화학적 양극산화 기법으로 제조한 타이타늄 나노튜브는 타이타늄 특유의 강한 화학내구성 및 나노튜브의 높은 종횡비로 인하여 넓은 범위에 응용된 소재이다. 전해질의 구성 성분과 종류, pH, 전압, 온도 그리고 양극산화 시간이 타이타늄 나노튜브의 성상을 결정짓는 요소들이며 도핑을 통해 촉매능을 부여할 수 있다. 비금속 및 금속 원소 모두도핑 가능하며 도핑 방법 역시 다양하다. 도핑 방법에는 합금 양극산화, 열처리법, 함침법, 전기도금법 등 다양한 방법들이 이용되며 점차 간단하고 빠른 도핑 방법을 찾는 방향으로 연구가 진행되고 있다. 본 총설에서는 타이타늄 나노튜브의 생성 원리와 상용된 제법들에 관하여 기술하고 도핑과 그 응용 및 최근의 도핑 연구 동향을 다루도록 하겠다. Nanotubular TiO2 prepared by electrochemical anodization has been significantly used for various applications due to high aspect ratio structures showing a high chemical stability. Morphological properties of nanotubular titanium oxide are easily tailored by adjusting types and compositions of electrolyte, pH value, applied voltage, temperature and anodization time. Since their catalytic properties can be enhanced by doping foreign elements into TiO2, metal as well as non-metal elements are doped into TiO2 nanotubes using different methods. For example, single anodization, thermal annealing, precipitation, and electrochemical deposition have been applied to simplify the doping process. In this review, anodization of Ti to produce TiO2 and doping methods will be discussed in detail.
UV-감응형 에폭시 마스크를 사용한 균일한 분포의 터널형 알루미늄 에치 피트 형성 연구
박창현 ( Chang Hyun Park ),유현석 ( Hyeon Seok Yoo ),이준수 ( Junsu Lee ),김경민 ( Kyung Min Kim ),김영민 ( Young Min Kim ),최진섭 ( Jin Sub Choi ),탁용석 ( Yong Sug Tak ) 한국공업화학회 2013 공업화학 Vol.24 No.5
The high purity Al foil, which has an enlarged surface area by electrochemical etching process, has been used as an anode for an aluminum electrolytic capacitor. Etch pits are randomly distributed on the surface because of the existence of surface irregularities such as impurity and random nucleation of pits. Even though a large surface area was formed on the tunnel- etched Al, its applications to various fields were limited due to non-uniform tunnel morphologies. In this work, the selective electrochemical etching of aluminum was carried out by using a patterned mask fabricated by photolithographic method. The formation of etch pits with uniform distribution has been demonstrated by the optimization of experimental conditions such as current density and etching solution temperature.
연구 논문 : 전기화학적 마이크로머시닝 기술을 이용한 균일한 니오븀 표면 에칭 연구
김경민 ( Kyung Min Kim ),유현석 ( Hyeon Seok Yoo ),박지영 ( Ji Young Park ),신소운 ( So Woon Shin ),최진섭 ( Jin Sub Choi ) 한국공업화학회 2014 공업화학 Vol.25 No.1
본 연구에서는 micro-contact printing을 통하여 니오븀 호일 표면 위에 균일한 에칭 pits를 형성하였다. 균일한 보호층을 형성하고자 전해연마의 효과를 확인하였으며, 기존의 O2 플라즈마 공정 없이 손쉽게 균일한 에칭 pits를 형성시킬 수 있는 조건을 확인하였다. 메탄올 혼합 전해질을 사용하여 10 min 동안 에칭을 진행한 결과 니오븀 호일 표면 위에 지름과 간격이 각각 10 μm와 5 μm로 잘 정렬된 에칭 pits를 관찰하였다. We describe the preparation of highly-ordered etching pits on the Nb foil through a micromachining. The effects of electro-chemical polishing on the formation of uniformly-patterned protective epoxy layer was investigated. Unlike the previous proc-ess using O2 plasma, well-ordered etched pits were prepared without any dry processes. As a result, the Nb foil with the well-ordered pits of 10 μm × 5 μm could be obtained by electrochemical etching in methanolic electrolytes for 10 min.