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윤경한(Kyoung Han Yoon) 한국안광학회 2000 한국안광학회지 Vol.5 No.2
In this study. to valuate the visual acuity of presbyopia. the study was researched by the amplitude accomodation method. The major findings was as follows 1. The add power was ranged from +0.50 Dptr to +4.00 Dptr. 2. Add power ≤ +1.00 Dptr was measured in 38 -44 ages. 3. The +1.25 Dptr ≤Add powers ≤ +2.00Dptr was measured in 45 - 50 ages. 4. The +1.50 Dptr ≤ Add power ≤ +3.00 Dptr was measured in 51 - 55 ages. 5. The +2.50 Dptr ≤ Add power ≤ +4.00 Dptr was measured in 56 - 65 ages. 6. They put on their glasses for near purpose in 60%.
크로스 실린더법과 적·녹검사를 이용한 정밀구면 굴절력에 관한 고찰
윤경한(Kyoung Han Yoon) 한국안광학회 1999 한국안광학회지 Vol.4 No.2
In this study, It obtained results that the exact spherical diopter to practice test by using Cross cyliner lens and Red Green Card method. In the test used to the 1750 eyes of middle and high school students. The results was as follows ; 1. Using Cross cylinder lens method, I tested a exact spherical diopter after accommodation. At -0.25 Dptr the ratio of spherical Dptr error limits were measured as 58o and al: -0.75 Dptr they were oppeared as 1%, at -1.00 Dptr they are not measured. In this method , the error limits of exact spherical Dptr was 91 % from 0 Dptr to -0.25 Dptr. 2. Using Red · Green Card method, they were measured as 45% at -0.25 Dptr. and measured as 20% at -0.50 Dptr. From the result of these test, Cross cylinder lens method was a better detailed method than Red · Green Card method.
윤경한(Kyoung Han Yoon),강명기(Myung Ki Kang) 한국안광학회 2000 한국안광학회지 Vol.5 No.1
In this study, It obtained that how myopitic astigmatism eyes appear in highschool students. The results were as follows. 1. In test, myopitic astigmatism eyes of men students are measured 60% in ratio and women students are measured are 57% in ratio. 2. In -1.00 ≥ cyl $gt; 0.00 Dptr, myopitic astigmatism eyes are measured 82% in ratio and in -1.50 ≥ cyl $gt; -1.00 that is measured 12% in ratio. 3. In -2.00 $gt; cyl, myopitic astigmatism eyes are measured 6% in ratio. 4. In the kind of astigmatism, The direct astigmatism axis is 81 % in ratio and each of the indirect astigmatism axis and the oblique astigmatism is 5%, 14% in ratio.
서명원(Myung-Won Suh),문영준(Young-Jun Moon),윤경한(Kyoung-han Yoon),권성진(Seong-Jin Kwon) 한국자동차공학회 2003 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this paper, driving characteristics of ASV (Advanced Safety Vehicle) equipped with ACC (Adaptive Cruise Control) system are investigated by vehicle dynamic simulation, which is embodied in VR (Virtual Reality) environment. The vehicle model contains the nonlinear subcomponents of engine, torque converter, automatic transmission and wheels. Longitudinal controller for ACC system is established by using sliding control theory and headway time policy. VR environment enables the visualization of vehicle motions and simulation reality on various conditions. Also, we research the real-time simulation algorithms that synchronized vehicle dynamic simulation with graphic rendering.
김광열 ( Kwang Yeol Kim ),최지영 ( Ji Young Choi ),이민혜 ( Min Hye Lee ),이운주 ( Un Joo Lee ),변자민 ( Ja Min Byun ),김유진 ( Yu Jin Kim ),윤경한 ( Kyung Han Yoon ),황인경 ( In Kyoung Hwang ),엄유진 ( Yu Jin Um ),김진숙 ( Jin Su 전북대학교 의과학연구소 2014 全北醫大論文集 Vol.38 No.1
전 흉벽통증을 호소하던 고령의 환자가 강직성척추염으로 확인 된 LOAS의 한 예로 고령의 환자에서도 염증성 관절염의 원인으로 LOAS가 가능하며 전형적인 임상양상과는 구별되는 비전형적인 증상패턴을 보일수 있음을 나타내는 증례이다. Ankylosing spondylitis(AS) is the major subtype of an interrelated heterogeneous group of inflammatory rheumatic diseases now named spondyloarthritides. Clinical features of this group include spinal and peripheral joint oligoarthritis (predominantly of the lower limbs), enthesitis, and at times, specific organ involvement such as anterior uveitis, psoriasis, and chronic inflammatory bowel disease. Clinical onset of AS after the age of 45 years is uncommon. Late-onset AS(LOAS) is characterized by severe disease, marked elevation of laboratory measurements of inflammation, and more frequent involvement of the peripheral joints (predominantly the shoulders) and the cervical spine as compared with early-onset Late onset AS. We report a case of LOAS with atypical symptom. We described a 50-year-old patient who presented with chest wall pain mainly, marked elevation of laboratory inflammatory markers, severe disease course and was successfully treated with anti-TNF inhibitor.
한범구,김정근,백제현,이우진,윤경한,주동표,조도현 한국키틴키토산학회 1998 한국키틴키토산학회지 Vol.3 No.4
We proposed a quantitative empiric equation for the effect of reaction time and reaction temperature on chemical deacetylation of chitin. The mathematic formula was proved to be in good agreement with the experimental values within 1.94% of AAD. According to the estimated results by the equation, optimal reaction temperature and reaction time were 413-433K and 60 minutes or less, respectively.