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광학계의 배율 변화를 고려한 DFF 기반의 형상 측정법
신영수(Y. S. Shin),김경범(G. B. Kim) 한국정밀공학회 2004 한국정밀공학회 학술발표대회 논문집 Vol.2004 No.10월
Errors resulting from magnification variations of optical system are largely generated in three-dimensional shape measurements. In the case of measuring the surface morphology of tiny objects based on DFF, images are acquired with a very small interval and then magnification changes are minimized. However, the magnification variations are actually existed in optical system and so focus measures in DFF are wrongly or ambiguously extracted. In this paper, a methodology based on DFF with the magnification changes is proposed to make more accurate measurement in surface morphology with high depth discontinuity, compared with previous ones. Several experiments show that the proposed method outperforms existing ones without magnification changes.
지역사회를 대상으로 한 당뇨병 및 당내인성장애 유병률 연구
이홍규(H . K . Lee),김성연(S . Y . Kim),고창순(C . S . Koh),민헌기(H . K . Min),이종구(C . G . Lee),안문영(M . Y . Ahn),김용익(Y . I . Kim),신영수(Y . S . Shin),박용수(Y . S . Park) 대한내과학회 1997 대한내과학회지 Vol.52 No.2
Objectives: Since Korea has been going through a rapid westernization we hypothesize that the rates of diabetes mellitus may begin to be more similar to that seen in the United States or Europe. To determine the prevalence of diabetes mellitus and impaired glucose tolerance(IGT) in Yonchon County of Korea, we performed a population-based survey on diabetes mellitus with random cluster sampling of residents>29 yr of age using oral glucose tolerance test(QGTT). Methods: The study was based on a population- based cross-sectional study with random cluster sampling of residents>29 yr of age. Of 3804 registered residents over 29 yr of age, a total of 2520 (66%) participants had a standard 75g OGTT, completed a detailed questionnaire and had standard anthropometric data collected. Resuls: The raw prevalence of diabetes was 9.1%, and the prevalence of IGT was 11.8%. The prevalence of undiagnosed diabetes(4.7%) was almost 1.4 times higher than that of previously diagnosed diabetes(3.3%). The age- and sex-adjusted prevalence of diabetes mellitus and IGT in people over 30yrs of age, as assessed by the 1990 Korea Population Census, were 7.4 and 9.7%, respectively. Conclusion: The prevalence of diabetes in Yonchon County was substantially higher than previously suggested. The high ratio of the numbers of undiagnosed to diagnosed cases is also of important concern. There has been a need to investigate these increasing prevalence using the same comparative methodologies.
Identification of Sex-Specific DNA Sequences in the Chicken
송기덕,신영수,한재용,Song, K.D.,Shin, Y.S.,Han, Jae Y. The Korean Society of Poultry Science 1993 韓國家禽學會誌 Vol.20 No.4
닭에서 적절한 성감별 방법을 개발하고 닭의 성분화 기작의 기초자료를 얻기 위하여 배아의 섬유아세포의 염색체를 분석하고, W 염색체 특이적인 반복염기서열과 50∼60%의 유사성을 보이는 random primer로 PCR 증폭을 실시하여 성을 판별하는 방법이 이용되었으며, 닭에서 성분화에 관련된 유전자를 분리하기 위해 W 염색체 특이적인 반복염기서열을 클로닝하였고, PCR을 이용하여 ZFY와 SRY 염기서열을 증폭하였다. 닭의 배아섬유세포의 염색체 분석 결과 Z 염색체와 W 염색체를 구분함으로써 배아의 성을 직접적으로 판별하는 것이 가능하였으며 , 암닭의 DNA를 Xho Ⅰ와 Eco RI로 절단하여 생성되는 band를 이용하여 성을 판별하는 것이 가능하였다. Xho Ⅰ와 Eco RI family를 클로닝하고, colony hybridization을 통해 Xho Ⅰ과 염기서열이 유사한 80∼100개의 clone을 동정하여, 이들 두 그룹간 DNA homology는 매우 유사하였다. 150개의 random primer 중 W 염색체 특이적인 반복 염기서열과 유사성을 보이는 primer 7개를 screening하였으며, 이 중 3개의 primer는 닭에서 자성과 웅성간의 차이를 나타내었다. 닭에서 성분화에 관련된 유전자를 동정하기 위하여 포유류의 ZFY와 SRY유전자의 PCR증폭을 실시하였다. ZFY를 증폭한 결과, 자성과 웅성간의 차이를 발견할 수 없었으며, 이는 닭에서 ZFY는 상염색체 또는 Z 염색체에 존재함을 시사한다. SRY의 증폭에서는 성간의 차이가 확인되었으나, 이 유전자가 Z 염색체에 존재하는지 W 염색체에 존재하는지 혹은 상염색체 존재하는지 여부는 연구가 필요하리라 사료된다. This study was performed to find out the reasonable sexing methods In the chicken, obtain the basic information for the mechanisms related to chicken sexual differentiation and identify the genes which known to involved in chicken sex differentiation. The chromosome analysis of chicken embryonic fibroblast was a simple method to determine sex of chicken by means of Z and W chromosome identification. The bands of female chicken genomic DNA digested with Xho Ⅰ and Eco RI restriction endonuclease showed to be useful in direct sex determination and these repetitive sequences of Xho Ⅰ and Eco RI families were proposed to be very homologous in their sequences by colony hybridization analysis. Seven of 150 random primers were selected to amplify the W chromosome-specific band by using arbitrary primed PCR and three of them were useful to identify the sex of chicken. To identify the sex differentiation genes in the chicken, PCR for the amplification of ZFY and SRY sequences was performed. ZFY and SRY sequences were amplified successfully in the chicken genome, implying that chicken genome might have the sex-related conserved sequences similar to mammalian ones. The PCR products of ZFY amplification were the same in both sexes, suggesting that these sequences may be located on autosome or Z chromosome. The profile of PCR amplification for SRY sequences showed variation between sexes, but this result was not enough to specify whether the SRY gene in chicken is on the autosome or sex chromosome.
차량 샤시 부품의 피로 해석을 위한 도로 부하 측정시 샘플링 주파수 설정에 관한 고찰
서경원(K.W.Suh),신영수(Y.S.Shin),정관영(K.Y.Jung) 한국자동차공학회 1998 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1998 No.11_2
In road load acquisition of the vehicle chassis component for fatigue-related test, there are different aspect to sampling frequency between frequency analyst and fatigue analyst. If acquired data from road are used for simulator, natural frequencies of components and actuation frequency are concerned, but for fatigue analyst's sake much large sampling frequency is used to catch peaks and valleys.<br/> Modern road load acquisition technique uses PC based instruments and can apply about hundred or thousand kilohertz sampling frequency But their storage devices are limited for long time acquisition, so some compromises are required.<br/> This paper describes experimental examination on setting of the sampling frequency for road load acquisition of vehicle chassis component. Data from different sampling frequencies are compared by rainflow count for fatigue analysis and proper sampling frequency is determined.<br/>
김경범(G. B. Kim),신영수(Y. S. Shin) 한국정밀공학회 2005 한국정밀공학회 학술발표대회 논문집 Vol.2005 No.10월
A hybrid focus method with multiple laser slits has been newly proposed and it is based on the integration of DFD and DFF. Rough depth information is estimated using DFD equipped with multiple laser slits, and then DFF is applied to only each specific depth range using the depth information resulting from DFD. The proposed hybrid method gives more accurate results than DFD and DFF, and faster measurement than DFF. Its performance has been verified through experiments of calibration blocks with sharp depth discontinuity.