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정전용량센서를 이용한 대구경 비구면 형상의 기상측정에 관한 연구
김건희,원종호,Kim, Geon-Hee,Won, Jonh-Ho 한국기계가공학회 2003 한국기계가공학회지 Vol.2 No.3
This paper described about on-machine profile measurement of aspheric surfaces using contact probing technique in ultra precision machine. A contact probe has been designed as a sensing device to obtain measuring resolutions in nanometer regime using a circle leaf spring mechanism and a capacitive-type sensor. The contact probe which is installed on the z-axis is In touch with the aspheric objects which is fixed on the spindle of the diamond turning machine(DTM) during the measuring procedure. The x, z-axis motions of the machine are monitored by a set of two orthogonal plane mirror type laser interferometers. As a results, the developed contact probe on-machine measurement system showed 10 nanometers repeatability with a ${\pm}2{\sigma}$ and uncertainty of 200 nmPv.
김건희,진호,양순철,김명상,국명호,이성호,육인수,Kim, Geon-Hee,Jin, Ho,Yang, Sun-Chol,Kim, Myung-Sang,Kook, Myung-Ho,Lee, Sung-Ho,Yuk, In-Soo 한국천문학회 2007 天文學論叢 Vol.22 No.3
The KASINICS (Korea Astronomy and Space science Institute Near Infrared Camera System) is a ground-based near-infrared (NIR) imaging instrument. KASINICS has offner relay optics to reduce unwanted infrared light. For the offner optics, we adopted an ultra precision machining process which is installed at KBSI (Korea Basics Science research Institute). Since the offner relay optics is made of aluminum 6061 metal material, we did several tests to reach the specification. We found that a 0.497mm radius nose bite and 220m/min machining speed are best tool and condition to make this offner optics with the precision machine. In this paper, we report the technical method of ultra precision machining and results of the KASINICS offner optics.
FRAC의 시스템 분석을 통한 기존의 미술관과 다른 구조적 이점 연구
김건희(Kim Geon-Hee),정태종(Jeong, Tae-Jong) 대한건축학회 2023 대한건축학회 학술발표대회 논문집 Vol.43 No.2
Fonds Régionaux dArt Contemporain (FRAC) was established in 1982. Its founded purpose was decentralization of modern art activity. And it also has special strategy. Those were installed in every 23 région and every FRAC are connected in one system. The goal of FRAC is to promote modern art and disseminate it to many people. This foundation use its systemic advantage to make various exhibition and education program. In this study, FRAC will be compared with other gallery and museum. As a result, FRAC has remarkable strong points and it is sustained and reinforced by its own network system.
현대 건축의 위상학적 설계방식의 장점에 대한 들뢰즈 생성의 개념을 통한 해석
김건희(Kim Geon-Hee),정태종(Jeong, Tae-Jong) 대한건축학회 2023 대한건축학회 학술발표대회 논문집 Vol.43 No.2
Architects tried to break through the limitations of existing modern architecture through topological design methods. Topological design methods allow new structures to be created by escape existing homotopy. These design processes are interpreted in response to the process of philosopher Gilles Louis René Deleuzes dichotomy, monism, and pluralism concept. Architects created new concepts by breaking down dichotomous architectural concepts, which created added value. In this study, those advantages are understood through the concept of Deleuzes creation. These buildings open new possibilities that cannot be done in buildings where existing dichotomous concepts remain.
김건희(Geon-Hee Kim),김윤중(Youn-Joong Kim),국명호(Myung-Ho Kook),이선규(Sun-Kyu Lee),홍권희(Kweon-Hee Hong) 한국기계가공학회 2007 한국기계가공학회지 Vol.6 No.2
This paper describes development of low cost precision machine that has a vacuum chuck. This study mainly aims to find out a cutting condition for maintaining optimum surface condition and to examine cutting characteristics of the precision machine that is equipped by diamond bites. The cutting materials is oxygen free copper. Several experiments were carried out to find out the main factors that affect the surface roughness such as principal axis RPM(rotation per minute), feeding speed, and cutting depth. As a result, we obtain The optimum cutting condition of the developed precision machine.
김건희(Kim, Geon-Hee),이희정(Lee, Hee-Chung) 한국도시설계학회 2016 도시설계 : 한국도시설계학회지 Vol.17 No.2
본 연구는 서울시를 대상으로 시민들은 주로 어떤 요소를 인지하여 도시이미지를 형성하고 있는지 도출하고, 인지지도에 나타난 서울의 공간구조를 분석하고자 한다. 데이비드 그레이엄 쉐인의 이론을 적용하여 랜드마크, 특정장소, 공간축, 복합중심의 네 가지 요소로 인지지도에 나타난 이미지구조를 분석하였다. 그 결과는 다음과 같이 요약할 수 있다. 첫째, 서울의 대표적인 도시이미지 요소는 한강이며, 그 외에 도심 ㆍ 강남 ㆍ 여의도가 시민들에게 강하게 인지되어 있었다. 둘째, 한강은 서울의 대표적인 도시이미지 요소이지만 서울의 공간구조를 결정하는 물리적 경계로써의 이미지가 강하다. 셋째, 서울은 한강을 경계로 도심으로 대표되는 강북과 강남구로 대표되는 강남이 서로 이질적인 도시이미지를 형성하고 있는 문제점이 나타났다. 넷째, 서울의 도시이미지는 주로 랜드마크와 특정장소의 단일요소로 인지되고 있어, 여러 지역이 복합중심으로 구조화 될 수 있도록 도시이미지의 제고가 필요하다. 이러한 연구 결과는 시민의 인식을 반영한 도시이미지의 제고와 도시 관리의 방향을 제시해준다는 점에서 의의가 있다. This study aims to identify the physical image elements of Seoul’s image and to analyze the spatial structure of the city image. The study analyzes the cognitive map by applying the theory of David Grahame Shane. Four elements for analyzing the image structure are landmarks, enclaves, armatures, and heterotopias. The conclusions of the study are as following. First, the Han River appeared as the most striking element of Seoul’s image. Image elements other than the Han River are mainly distributed in the city centers of Gangnam and Yeouido. Second, the Han River is a representative image element of Seoul and has a strong image as a physical boundary that determines the city’s spatial structure. Third, Gangbuk and Gangnam have formed a heterogeneous urban image. Fourth, due to the variety of city images, many regions in Seoul should be recognized as heterotopias. This study is significant in that it offers signposts for the direction of urban management and improving the city image so that it reflects citizens’ consciousness.
Y2K주택과 카사 다 뮤지카의 위상학적 연산 비교를 통한 도시공간구조 해석
김건희(Kim Geon-Hee),조현호(Cho, Hyeon-Ho),정태종(Jeong, Tae-Jong) 대한건축학회 2023 대한건축학회 학술발표대회 논문집 Vol.43 No.1
This study will confirm that the topological structure and spatial relationship are maintained even when the scale changes through the comparison of Rem Koolhaass buildings, Y2K house and the Casa da Musica. variation, a topological calculation, is methods that can varies the one homotopy into different scales. using this, we will see whether the logic used in Casa da Musica and Y2K House can be applied on a larger scale. just as the topological structure was maintained on the scale of house and music hall, it was thought that it could be maintained on larger, urban scale. so it can examine whether the same topological operations can be used to produce larger scale variations. and the same logic will be applied to understand the existing building and urban space.
김건희(Kim, Geon-Hee),김혜민(Kim, Hye-Min),이현수(Lee, Hyun-Su) 한국체육과학회 2018 한국체육과학회지 Vol.27 No.5
The purpose of this study was to analyze the level of motor behavior according to the sociodemographic characteristics of persons with physical disabilities and to compare the difference of self-efficacy, decision balance and to verify the validity of the transtheoretical model by analyzing the effect of sub - variables on the level of participation in the exercise. The subjects were residents of the Gyeongnam area, who were participating in physical exercise at the welfare center and physical sports center. Prior to the questionnaire distribution, 359 subjects were selected through convenience sampling. Exploratory factor analysis and internal consistency analysis were performed to test the validity and reliability of the questionnaire. Multivariate analysis was conducted to compare and analyze the level of exercise participation according to the level of exercise participation and demographic characteristics. The regression analysis was performed to confirm the effect of self-efficacy, decision balance, and exercise behavior change on the level of exercise participation. The statistical significance level(p) was set at .05. The results of this study are as follows. First, the distributional difference of the exercise participation level by age group was significant(x²=33.40, df=10, p<.001). Second, According to the analysis of technical statistics according to gender and age, there was a significant difference in the cognitive process, which is a sub - factor of the process of changing the motor behavior, in the 20-30th and 40-50th groups(p<.05). Third, the sub-variable self-efficacy, decision-balancing, and behavioral change process influence the level of exercise participation.