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안경테 및 안경테 부품 설계를 위한 머리와 얼굴 치수 연구
최계훈 대구보건대학교 2012 대구보건대학 論文集 Vol.32 No.-
The purpose of this study was to understand and take advantage of the help of parts about the head and face about dimensions of anthropometry for measurement data frames, design of products frames, and convenience products. Methods: Size Korea survey conducted by Age, Mean of sex average and standard deviation and teh minimum valus and maximum were investigated from 2010 to 2011. Results: Head and parts of the face of the theorem related to the design of parts, frames and frames items in 21 dimensions, and peopl of Korea by comparing the values of each are presented in the paper to know the change in dimensions on the head and face area could be.
안경광학과 학생들의 현장(임상)실습 만족도에 따른 취업 성향 분석
최계훈,Choi, Gye-Hun 한국임상보건과학회 2016 한국임상보건과학회지 Vol.4 No.4
Purpose. This research study is to understand the effects of field (clinical) Practice on employment choice and decision. Method. The research study conducts a questionnaire survey of trainees who received field (clinical) Training during the period of 2016 summer vacation to analyze the data, utilizing Likert 5 rating scales and conduct a statistical analysis with the tool of SPSS 18.0. Results.. As for the satisfaction of the participation of Practice, girl students account for the high rate (75.1%) compared with boy students (61.7%). Regarding the satisfaction of each Practice spot, ophthalmic clinic reaches the high rate (77.8%) compared with optical shop (65.7%). Practice about practice courses (53.2%) of regular subjects have somewhat close correlations compared with theory courses (46.8%). 75.2% of respondents in the group that shows the high satisfaction of the participation of Practice replied that they would decide employment as an academic major after Practice. And the figure is proved to assume a high ratio. Conclusion. The analytic research outcome indicates that those trainees who received Practice in an ophthalmic clinic have higher satisfaction than those who received Practice in an optical shop. There is the high accomplishment of employment in relation to academic major area instead of other area, after Practice.
보건계열 중 간호과와 안경광학과 학생들의 학습 성향 분석
최계훈,소명숙 대구보건전문대학교 2006 대구보건대학 論文集 Vol.26 No.-
The lst grade of Nur (Department of Nursing), ACT was higher than REF, but ACT was lower than REF in the 2nd and 3rd grade. SEN was increased in the 2nd grade more than lst grade, but it was decreased in the 3rd grade, VIS as well. The case of SEQ, it developed a tendency to increase as their grade was higher. The Oph (Department of Ophthalmic Optics) showed a tendency to REF, but it changed to propensity of ACT in the 2nd grade. And also propensity of SEN was much higher than INT when they were in the lst grade, but the gap was reduced when they were 2nd grade. As the grade was higher, the students had preference of VIS over VRB and the gap of the preference between VIS and VRB was increased, the propensity of SEQ was increased as well. Therefore the first students in the Department of Nursing showed strong propensity of ACT and they changed to the propensity of REF after. The students of the Department of Ophthalmic Optics showed the opposite propensity. The other learning propensity showed that the propensity of the first grade maintained to upper grade.
최계훈(Choi, Gye-Hun),김상연(Kim, Sang-Yeoun) 한국산학기술학회 2011 한국산학기술학회논문지 Vol.12 No.3
직경 400mm 순티타늄 잉고트(Gr2)를 제작하고 성분 분석한 결과 산소함량이 0.073wt%이고 철함량이 0.03wt%로서 ASTM Gr.2 규격을 만족하였다. 이들을 가공하여 42mm 선재를 만들고 18단 열간 압연하여 9mm 선재 를 만들었다. 10단 열간 가공한 15.8mm 선재를 표면에서 부터 중심부로 가면서 경도 분석한 결과 Hv150~200로서 거 의 일정한 값을 나타내고 있었다. 최종 9mm 선재는 열간 압연기에 인입시 온도에 따라 항복강도와 연신율은 달랐지 만 인장강도는 근사한 값을 나타내었으며 모두 ASTM B863규격을 만족하였다. After pure titanium Ingot(G2) with 400mm in diameter was manufactured, the analysis of its ingredients showed that the oxygen content was 0.073wt% and the iron content was 0.03wt%, which made ASTM Gr.2 standardization satisfactory. The processed titanium ingot produced 42mm wire rod, and hot rolling of 18th phase produced 9mm wire rod. The hardness analysis of 15.8mm wire rod, which was processed in hot rolling of 10th phase from the surface to the center, resulted in almost constant value with Hv150~200. The last 9mm wire rod had a different yield strength and elongation percentage depending on the temperature as it was led in to a hot roller. However, tensile strength revealed an approximate value and made ASTM B863 standardization satisfactory.
박경주,김영규,최계훈,백상훈,황성기,곽진석,이종훈,권진혁,박이순,Park, Gyeung-Ju,Kim, Young-Gyu,Choi, Gye-Hun,Baik, Sang-Hoon,Hwang, Sung-Ki,Gwag, Jin-Seog,Yi, Jong-Hoon,Kwon, Jin-Hyuk,Park, Yi-Soon 한국광학회 2009 한국광학회지 Vol.20 No.5
액정표시장치의 고효율 백라이트 집광시트로 활용하기 위하여 배면 개구형 집광시트를 설계 및 분석하였다. Microlens array sheet, 피라미드 array sheet, 그리고 cone array sheet에 대해서 자체 정렬에 의한 배면 개구 형성 특성을 비교 분석한 결과, microlens array sheet가 가장 우수하였고, 다음으로 피라미드 array sheet였으며, cone array sheet가 가장 부적합하였다. Optical sheets with apertures on the opposite side of the substrate are designed and analyzed in order to use them as high efficiency light concentration sheets in LCD edge-lit backlight. Formation of apertures by self-aligning exposure were analyzed for the microlens array sheet, pyramid array sheet, and cone array sheet and the microlens array sheet showed the best performance for the formation of apertures by the self-aligning exposure.
합성광학계의 OSLO를 통한 optical focus 의 최적화
김대년(Dae Nyoun Kim),최계훈(Gei Hun Choi) 한국안광학회 2000 한국안광학회지 Vol.5 No.1
This study was to calculate spot size, focus shift and optical focus by use of OSLO when 3 wavelength, wv₁= 0.588u. wv₂ = 0.486u and wv₃= 0.656u in composite lens optics system & ocular optical system were respectively here, Entrance Beam Radius ( ㎜ ) 1 ㎜, Field angle ( deg ) 5.7296u - 0.5 ㎜, Image Aperture 0.053055 ㎜. Exit Aperture 0.903711 ㎜. Reflective focal length 25.181544 ㎜, Petzval radius -19.21839 ㎜, n = 1.523. It was found that a range of spot size was 0.002 ㎜ ∼ 0.07 ㎜ when a range of back curvature radius was 1 ㎜ ∼ 30 ㎜. and 0.0005 ㎜ ∼ 0.002 ㎜ when of it more than 50 ㎜. Focus shift, 50 ㎜ a range 3 kinds of lens was small, and it saw that of all tendency was high up to 1 ㎜ ∼ 15 ㎜ and up to 25 ㎜ beyond that limits, it was going down and then going up again, optical focus 100 ㎜ lens was best and the value when optimization with this lens was 60 ± 1 ㎜.