• 대한한의진단학회지
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• 제16권3호
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• pp.41-48
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• 2012

Objectives: The aims of this study are to design a optimized mechanical structure of digital tongue imaging system (DTIS) equipped with LEDs in aspects of object distance and camera angle of coverage. Methods and Results: We tried to find optimized object distance while recording a rectangular object of common tongue size. In case object distance is 22 cm or less, edge of the rectangle was not taken beyond the shooting range. In contrast, if object distance is 40 cm or more, the rectangle image was too small. Therefore when considering the variation of subjects, we selected distance of 35-40 cm as appropriate object distance for the DTIS. We also tried to find optimized angle between camera view axis and horizontal line. We photographed from the side of the face of 7 adults with exposed tongue. We drew an exposed tongue lines to connect the tongue tip points and the tongue root points by using the photos acquired from the side faces. And then we calculated the tongue exposure angles between the vertical line and the exposed tongue lines. Mean tongue exposure angle was $28.3^{\circ}$ when tongue was lightly exposed and $13.3^{\circ}$ when maximally. So we determined $73^{\circ}$ as appropriate slope angle of part in contact with face of the DTIS and by considering that the standard variation was great, we designed control gears to adjust the slope of the camera view axis and to regulate the object distance. Conclusions: We designed a optimized mechanical structure in object distance and slope angle of part in contact with face of the DTIS.

• 대한한의진단학회지
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• 제16권1호
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• pp.9-18
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• 2012

Objectives The aim of this study is to propose an optimized tongue colour interpolation method to achieve accurate tongue image rendering. Methods We selected 60 colour chips in the chips of DIC color guide selector, and then divided randomly the colour chips into two groups. The colour chips of a group (Gr I) were used for finding the optimized colour correction factor of error and those of the other group (Gr II) were used for verifying the correction factor. We measured colour value of the Gr I colour chips with spectrophotometer, and took the colour chips image with a digital tongue image system (DTIS). We adjusted colour correction factor of error to equal the chip colour from each method. Through that process, we obtained the optimized colour correction factor. To verify the correction factor, we measured colour value of the Gr II colour chips with a spectrophotometer, and took the colour chips image with the DTIS in the two types of colour interpolation mode (auto white balance mode and optimized colour correction factor mode). And then we calculated the CIE-$L^*ab$ colour difference (${\Delta}E$) between colour values measured with the spectrophotometer and those from images taken with the DTIS. Results In auto white balance mode, The mean ${\Delta}E$ between colour values measured with the spectrophotometer and those from images taken with the DTIS was 13.95. On the other hand, in optimized colour correction factor mode, The mean ${\Delta}E$ was 9.55. The correction rate was over 30%. Conclusions In case of interpolating colour of images taken with the DTIS, we suggest that procedure to search the optimized colour correction factor of error should be done first.

• KDI Journal of Economic Policy
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• 제32권4호
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• pp.1-34
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• 2010

본 연구에서는 국내 최초로 총 2,210만명의 개인신용 전수미시자료에 기초하여 차주별 특성 및 금융업권별로 부채상환능력을 비교 분석하고, 거시경제 충격에 따른 금융권역별 총부채상환비율(DTI)과 불량률의 변화, 차환위험 분석 등을 통해 가계부채의 건전성을 평가하였다. 실증분석 결과, 차주별로는 저소득 근로자와 고소득 자영업자의 부채상환부담이 상대적으로 높고, 금융업권별로는 캐피탈 및 카드사의 저소득 차주군, 상호저축은행의 고소득 차주군, 은행과 제2금융권 금융회사로부터 복수의 부채를 보유한 차주군의 부채상환능력이 특히 취약한 것으로 분석되었다. 시나리오 분석 결과, 향후 연간 금리 상승폭이 3%p, 소득감소율이 5% 수준 이내인 경우 가계의 부채상환부담 및 불량률 상승효과는 금융권이 현재의 자기자본으로 충분히 흡수할 수 있는 것으로 나타났다. 그러나 세부 권역별로는 캐피탈, 카드사, 상호저축은행 등 이미 차주의 DTI가 높은 제2금융권을 중심으로 가계부채의 부실화 가능성이 있는 것으로 분석되었다. 최근 가계부채 증가가 고소득층의 주택담보대출을 중심으로 이루어져서 상대적으로 안전하다는 견해가 있으나 고소득 차주군, 특히 자영업 고소득 차주군의 DTI 및 고위험군 비중이 높게 나타나, 향후 DTI 규제, 금리 상승 등으로 만기도래하는 일시상환형 주택담보대출의 차환이 어려울 경우 주택가격 하락과 함께 가계부실이 증가할 수 있음에 유의할 필요가 있다. 본 분석 결과는 기존의 거시총량지표를 이용한 가계부실위험 모니터링과 더불어 CB 등 미시자료를 이용한 차주 단위 분석을 결합하여 거시건전성 감독 차원에서 보다 심층적인 가계부채의 위험관리가 필요함을 시사한다.

• 한국자동차공학회논문집
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• 제11권1호
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• pp.112-120
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• 2003

In this paper, dynamic track tension fur high mobility tracked vehicle is investigated by multibody dynamic simulation techniques. This research focuses on a heavy military tracked vehicle which has sophisticated suspension and rubber bushed rack systems. In order to obtain accurate dynamic track tension of track subsystems, each track link is modeled as a body which has six degrees of freedom. A compliant bushing element is used to connect track links. Various virtual proving ground models are developed to observe dynamic changes of the track tension. Numerical studies of the dynamic track tension are validated against the experimental measurements. The effects of pre-tensions, traction forces, fuming resistances, sprocket torques, ground profiles, and vehicle speeds, for dynamic responses of track tensions are explored, respectively.