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TFT-LCD 3차원 시뮬레이션에서의 광 경로에 대한 고려
최경욱,김기범,박우상,Choi Kyoung-Uk,Kim Gee-Bum,Park Woo-Sang 한국전기전자재료학회 2006 전기전자재료학회논문지 Vol.19 No.2
We report a novel simulation method to calculate optical transmission considering the real paths of optic introduced in a unit pixel of TFT-LCDs using three-dimensional molecular director simulation of the tensor model. The simulation of optical path transmission profile was carried out by calculating new permittivity considered the real paths of optic in liquid crystal cell. As a result, it was clarified that the electro-optic characteristics such as movement of disclination line, contrast ratio and transmittance profile show a large difference according to the viewing angle compared with the conventional method.
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체질량 지수와 운동, 흡연, 음주와 관계 : 일개 병원 건강진단자료에 근거한
김기범,이정희,이석기 朝鮮大學校 附設 醫學硏究所 2006 The Medical Journal of Chosun University Vol.31 No.3
Backgrounds: Obesity is known to be a risk factor of adult disease. This study is aimed to identify the prevalence rate of obesity, factors related to BM1(Body Mass Index) which is used as a measure of obesity, and the prevalence rates of hypertension and diabetes which are both obesity-related diseases. Methods: We reviewed 1,189 people who underwent National health examination at the Health Examination Center in National Police Hospital from March 1, 2005 through May 31, 2005. And we evaluated their BMIs, ages, whether they exercised regularly, how many pieces of cigarette per day they smoked, and how many days per week they drank alcohol. Hypertension and diabetes mellitus were chosen to be the obesity-related diseases in this study. Results: The subjects of this study were 1,189 people, and they were 561 males(47.2%) and 626 females(52.9%). The average age of the males and the females were 49.9±13.9 and 50.9±11.7, respectively. The BMI of the males was 24.6+2.7㎏/ ㎡, which was higher than the females, with 23.0±3.1 ㎏/㎡. The BMI of the males increased as their ages increased through their forties, and started to decrease from their fifties, In females, the lowest BMI was checked in their 20s, and the BMI kept increasing as the ages increased, In males, the group of regular exercise showed lower BMI than the group of no exercise(P<0.05), and was less than the one of the group who smoke more than 20 pieces, In both males and females, the BMI of the group who drank alcohol more than 3 days per week was higher than the one of the group who drank alcohol less than 3 days per week(males P<0.01, females P<0.05). In female, there was no difference of BMI whether they exercised more or smoked more. Conclusion: The BMI was higher in males than females, In males, there were a increase of BMI through their forties and a decrease of BMI from their fifties, In females, the BMI kept increasing as the ages increased. Smoking and Exercise made significant differences in males only, as the BMI of the male group who smoked less than 20 pieces of cigarette per day was lower than the one of the male group who smoked more than 20 pieces, and also the BMI of the male group of regular exercise was lower than the one of no exercise, In both males and females, the more they drank, the higher BMI they showed. The prevalence rates of hypertension and diabetes increased as the BMI increased.
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