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박은천(Eunchurn Park),강형구(Hyung-Goo Kang),최준성(Jun-Sung Choi),김은성(Eunsung Kim),김만철(Man-Cheol Kim) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.10
In this paper with the background features on which measuring the transverse left-right and up -down vibration of wheel bogie and body by wireless measurement system performance evaluation systems which can assess the running behavior of high speed trains based on UIC code 518-OR and evaluate the ride comfort of them based on ISO code 2631 and UIC code 513 were developed. The characteristics of dynamic vibration are generally analyzed by an acceleration of a car body of high speed train and the acceleration can be applied to evaluation of running safety. In this paper also matching system of distance from tachometer and vibration from accelerometer was programmed in development software and the SD card embedded system which prevent to loss of data in wireless measurement was mounted on this system. Finally the software perform to analysis with filtering and statistical post-process in the unit sections and zones and focus on developing the capability monitoring in the main control center. For the verification of this system the running behavior and safety factor were analyzed based on field measured data of the Cheonjun-gunnum-sun turn out point in the new KTX railway.
비만인과 정상인의 근육둘레비율 및 수분분포와 BMI의 상관성 연구
박원형 ( Won Hyung Park ),김동건 ( Dong Gun Kim ),차윤엽 ( Yun Yeop Cha ),김진연 ( Jin Yeon Kim ),박병철 ( Byung Cheol Park ),윤용관 ( Yong Kwan Yoon ),편기욱 ( Ki Wook Pyun ),황만영 ( Man Young Hwang ) 한방재활의학과학회 2005 한방재활의학과학회지 Vol.15 No.2
Objectives : This study aims to confirm the importance of behavior habit and exercise, especially leg exercise in obese. Methods : Out of 2247 people, we divided 1125 people in normal group(BMI<25) and 1122 people in obese group(BMI.25). We measured each arm, leg, abdomen muscle circumference and right and left water difference using BIA. We Investigated whether ratio of leg muscle circumference to arm and abdomen has differences by statistics between each groups. And analyzed correlation with BMI. We also investigated right and left water distribution difference of two group`s limbs and the correlation with BMI. Statistical analysis was performed by using SPSS program. Results : 1. In obese group, ratio of leg muscle circumference to arm and abdomen is significantly lower than normal group(P<0.001).2. Ratio of leg muscle circumference to arm and abdomen were negatively correlated with BMI(r=-0.461, r=-0.462, P<0.001). And partial correlation coefficient controlled for age and sex is -0.528, -0.632(P<0.001). 3. In the case of women, there was right and left water distribution difference as statistical in leg. In the case of Obese, the difference is serious. Conclusions : These results suggest that exercise and activity of lower limbs is more needed in the field of obesity treatment and prevention.