천체관측용 적외선 광학계 초정밀 가공

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.

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.

지적장애아동의 이동운동능력과 또래놀이 상호작용에 커뮤니티 스키핑 프로그램의 효과 분석

김건희 ( Geon Hee Kim ),김혜민 ( Hye Min Kim ),박진우 ( Jin Woo Park ),이현수 ( Hyun Su Lee ) 한국특수체육학회 2015 한국특수체육학회지 Vol.23 No.1

본 연구는 커뮤니티 스키핑 프로그램을 개발하여 지적장애아동에게 적용시킴으로써 그에 따른 이동운동능력과 또래놀이 상호작용에 미치는 효과를 규명하는데 목적이 있다. 이를 위해 부산시에 소재하고 있는 H스포츠센터와 H특수학교에 소속된 지적장애아동을 편의표집하여 총 16명(실험군8, 통제군8)의 연구대상을 선정하였고, 커뮤니티 스키핑 프로그램은 실험집단을 대상으로 주2회(50분) 12주간 적용하여 전체 24회기로 구성하였다. 측정도구는 Ulrich이 개발한 대근운동능력측정 검사도구인 TGMD-Ⅱ의 하위요인 중 이동기술검사지와 Fantuzzo, Manz 그리고 McDermott(1998)의 설문지를 수정·보안하여 사용한 신은수, 권미경, 정형빈(2010)의 설문지를 사용하였으며, 자료 분석방법은 SPSS 18.0을 이용하여 공변량분석을 실시하였다. 이를 통해 나타난 결과는 첫째, 프로그램에 참여한 지적장애아동은 참여하지 않은 지적 장애아동보다 이동운동능력의 하위요인(달리기, 갤롭, 멀리뛰기, 홉, 립, 슬라이드)에 유의한 영향을 미치는 것으로 나타났다. 둘째, 프로그램에 참여한 지적장애아동은 참여하지 않은 지적장애아동보다 또래놀이상호작용의 하위요인 중 놀이단절은 감소하여 유의한 영향을 미치는 것으로 나타났으며, 놀이상호작용과 놀이방해는 유의한 영향을 미치지 않은 것으로 나타났다. 이에 추후 연구에서는 지적장애아동의 지속적인 관찰과 측정을 통해 다양한 프로그램으로 접근하여 차별화된 교육을 실시할 수 있는 커뮤니티 스키핑프로그램의 개발과 적용에 대한 연구가 필요할 것으로 생각된다. 또한 다양한 장애유형과 장애등급별 프로그램을 적용하여 그 효과를 검증하는 지속적인 추후 연구가 이루어져야 할 것으로 생각된다 The purpose of this study was to find out how a community skipping program influences the changes in the locomotion skills and interactive peer play of children with intellectual disabilities and to develop and apply appropriate community skipping programs on to the basis of accurate analysis and education programs. For this purpose, 16 children with intellectual disabilities from the ‘H’ welfare center and the ‘H’ special education school in the city of Busan in the way of convenient sampling, and they were divided into 8 experiment group members and 8 control group members were sampled. The community skipping program was applied for the experiment group two times a week (50 minutes each day) for 12 weeks, consisting of a total of 24 times of application. For measuring tools, TGMD-Ⅱ(Test of Gross Motor Development-Ⅱ) test sheet of Ulrich(1985) and the survey sheets of Eun-Soo Shin, Mi-Kyung Kwon, Hyun-Bin Jeong(2010) which were recomposed by revising and supplementing referred to PIPPS(Penn Interactive Peer Play Scale) of Fantuzzo, Manz and McDemott were used. The method of data analysis was implemented for the covariate analysis by using SPSS 18.0. The results are as follows. Firstly, participants with intellectual disabilities in the experimental group in the program showed a higher capacity for locomotion skills (running, galloping, horizontal jumping, hopping, leaping, and sliding) than the children those who did not participate in. Secondly, the children with the intellectual disabilities that participated in the program showed more declining rate for play disconnection than those who did not participate, while did not show any significant changes in play interaction and disruption compared to those who did not participate in. When all the results were combined, significant results in the play interaction and play disruption, sub-factors of the interactive peer play by increasing the experiment period were expexted. So it will take a variety of trials to complete the differentiated community skipping program. And also, it will need continued researches to verify the effects from different programs according to types and ranks of disability.

마그네슘을 6 wt.% 함유한 알루미늄 합금의 저항 점용접성 평가

김민규(Mingyu Kim),김세현(Sehyeon Kim),황인성(Insung Hwang),김동윤(Dong-Yoon Kim),김영민(Young-Min Kim),이승환(Seung Hwan Lee),유지영(Jiyoung Yu) 대한용접·접합학회 2021 대한용접·접합학회지 Vol.39 No.5

To ensure safety and reduce the weight of vehicles, studies are being actively conducted on different aluminum alloys that have strength higher than conventional aluminum alloys. The development of high-performance aluminum alloys through magnesium content control is underway. Research on manufacturing techniques, such as, welding for application to the car body parts of these materials is required. In this study, the resistance spot weldability of an aluminum alloy with 6 wt.% magnesium (Al-6Mg) was evaluated and compared with the commercial aluminum alloy 5052, 6061 (Al5052, Al6061). The suitable welding range of the Al-6Mg was found to have a welding current of 24 ㎄ to 28 ㎄, and a similar level of Al6061. The welding heat input was almost the same for the three materials, which resulted in no difference in the diameter of the nuggets. There was no significant difference of the porosity ratio between Al-6Mg and Al5052; however, the porosity ratio of Al6061 was higher. The alloy with the highest tensile shear strength, hardness and energy absorption of a welded joint was Al-6Mg. The low porosity ratio and high hardness of the Al-6Mg alloy caused the relatively high tensile shear strength and energy absorption of the welded joint.

문화예술교육정책 안에서 미술영재의 선발현황과 개선방향

김건희(Geon-hee Kim) 한국문화관광연구원 2012 문화정책논총 Vol.26 No.2

반구형 천장 흡음재 형상 및 흡음률 변화에 따른 오픈 플랜 오피스의 스피치 프라이버시 영향

김건희(Kim, Geon-Hee),문완기(Moon, Wan-Ki),안수경(An, Su-Kyeong),장서진(Jang, Seo-Jin),홍주영(Hong, Joo-Young) 대한건축학회 2023 대한건축학회논문집 Vol.39 No.10

[정밀가공 부문] 자유형상 광학계 초정밀가공기술

김건희(Geon Hee Kim) Korean Society for Precision Engineering 2022 한국정밀공학회 학술발표대회 논문집 Vol.2022 No.5

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.

서울시 공간구조의 인지특성에 관한 연구

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.

지체장애인의 운동참여수준에 따른 단계적 변화모형분석

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.