• 한국전자파학회논문지
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• 제24권2호
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• pp.161-167
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• 2013

전자파 노출에 대한 동물실험에서는 실험동물 내에서의 SAR 값을 정확히 추정하는 것이 매우 중요하다. 본 논문에서는 동물의 수와 동물 간의 거리, 물병의 존재 여부에 따른 마우스(mouse)와 랫트(rat) 내의 SAR 값의 변화량을 분석하였다. 마우스와 랫트는 전자파 잔향실(reverberation chamber) 내에 위치한 케이지(cage) 안에서 CDMA, WCDMA 주파수의 전자파에 노출시켰다. 시뮬레이션 결과, 물병의 물의 양에 대한 SAR 값의 변화보다 실험동물의 마릿수가 증가할 때 SAR 값의 변화가 더 컸다. 마우스와 랫트가 케이지 내에 한 마리만 있을 경우에 비해, 마우스는 케이지 내에 세 마리가 있을 때 전신 평균 SAR 값의 변화량은 850 MHz와 1,950 MHz에서 각각 최대 15.3 %, 14.9 %이며, 랫트의 경우에는 케이지 내에 두 마리가 있을 때 각각의 주파수에서 최대 18.7 %, 21.1 %의 변화를 보였다. 결론적으로 실 노출 환경에서의 노출 조건에 따른 SAR 값의 변화량은 무시할 수 없다는 결론을 도출하였다.

• Korea-Australia Rheology Journal
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• 제21권3호
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• pp.175-183
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• 2009

This article describes the numerical investigation of blood flow in the stenosed artery bifurcation with acceleration of the human body. Using the commercial software FLUENT, three-dimensional analyses were performed for six simulation cases with different body accelerations and bifurcation angles. The blood flow was considered to be pulsation flow, and the blood was considered to be a non-Newtonian fluid based on the Carreau viscosity model. In order to consider periodic body acceleration, a modified, time-dependent, gravitational-force term was used in the momentum equation. As a result, flow variables, such as flow rate and wall shear stress, increase with body acceleration and decrease with bifurcation angle. High values of body acceleration generate back flow during the diastolic period, which increases flow fluctuation and the oscillatory shear index at the stenosis.

• 한국해양공학회지
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• 제27권1호
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• pp.80-84
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• 2013

This study is to develop the simplified formulae for added mass coefficient of a 2-D floating body with a semi-circle section in a finite water depth. The semi-circle floating body may represent a simplified midship section transformed by Lewis form, which can be used for the ship motion analysis by strip theory. Since the added mass coefficient varies with motion frequencies and sea bottom effect, the correction factor representing the effect of water depth and frequencies is developed for accurate prediction of added mass. Using a two-dimensional numerical wave tank (NWT) technique based on the boundary element method (BEM) including sea bottom boundary the reference values of added mass are calculated to develop the correction factor. For verification and effectiveness of the formulae, the predicted added mass coefficients for various frequencies and water depth ratios are compared with the calculated values from NWT technique.

• 복식
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• 제53권1호
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• pp.117-128
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• 2003

For the advance of Korea's ready-made clothes industry into China, we need some information about the body types of the Chinese and the sizes of ready-made clothes. The purpose of this study is to prepare basic data about the reality and process of the size establishment of clothing sizes in China. The conclusions are as follows. 1. Clothing size establishment was made three times in 1981, 1991, and 1997. At present, the version of 'GB/T 1335-1997 Size' is used. 2. 'GB/T 1335-1997 Size' is composed as follows. \circled1 Based on the drop values of chest girth and waist girth, 4 (Y. A, B, C) body types of adult men and women were chosen. \circled2 Sizes contains Ho and Hyoung, 'Ho' refer to height (cm) and serve as the standard of length, while 'Hyoung' indicate chest girth (cm) and act as the standard of girth. \circled3 The size divisions of the 3 basic items for adults are 5cm (height), 4cm (chest girth), and 2cm (waist girth). So they are named '5ㆍ4, 5ㆍ2 size series', \circled4 For grading in dress production, approximate values to the means of the 2 basic items are called 'center types'.\circled5 Other necessary items for clothing design besides 3 basic items are named 'control items'. \circled6 For babies, children, and adolescents, no body type classification is established. Instead, size series are established according to body height.

• 복식
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• 제51권1호
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• pp.87-96
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• 2001

This study, dealing with obese bodily figures from the viewpoint of garment shape, was conducted with obese male children of late school ages(nine to eleven years old) to provide data for making ready-made clothing for obese children by directly measuring and analysing the bodily figure of the upper body of them. The results of the study are summarized as follows. 1. According to the basic statistics, for most of obese children the values of the measuring items by ages appeared to be large, and the results of comparison with the National Anthropometric Survey of Korea made in 1997 showed that the values were more large than those of standard physical conditions. 2. It was shown that in the correlation between items the upper breast circumference had a high correlation with all items, and the weight did with the following items such as circumference, height, width and thickness. 3. The results of the principal component analysis showed that six main components hand an explainable power of more than 75.60% for all materials. The first factor was thickness and obesity of the upper body, the second one the height, the third one the length of front and rear sides, the fourth one the width of neck, the fifth one the length of shoulder, and the sixth one the breast width and the wrist circumference.

• Journal of Radiation Protection and Research
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• 제39권1호
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• pp.1-6
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• 2014

원전에서는 방사성핵종의 체내 섭취에 따른 작업종사자의 내부 방사능을 측정하기 위하여 전신계측기(WBC)를 이용하고 있다. 이 계측기는 인체 내 방사성핵종의 침적위치를 고려하여 다양한 측정 모드를 선택하여 측정할 수 있으나, 대부분 전신 모드를 적용하고 있다. 그런데 전신 모드를 적용한 내부방사능 측정값은 WBC 측정 모드 중에서 가장 보수적인 값을 나타내는 특성이 있고, 따라서 내부피폭 방사선량이 과대평가되는 문제점이 있다. 이러한 문제점을 해결하기 위해 WBC, 팬텀, 표준 방사선원을 이용하여 WBC의 측정 모드별 방사능측정 실험을 수행하였다. 이 결과에 대해 통계적 분석방법을 적용하여 WBC의 상부 및 하부 검출기 계측비율에 따라 WBC의 측정 모드를 선정할 수 있는 정량적인 기준을 제시하였다.

• 한국식생활문화학회지
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• 제8권1호
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• pp.63-71
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• 1993

The purpose of this paper it to investigate the differences in prevalence of obesity and body fat distribution on the variances of age. Height, weight, skinfold thickness and girth circumference on about 422 women residing in Cheju, Korea were surveyed. The results of analysis of the survey are as follows : 1) All the antropometric measurements except height were shown to increase with age. Weight is at its highest level between the age of 50-59. The measurement of skinfold thickness and girth circumference between the ages of 20-39 of the female subjects are significantly higher than the above 40's. However, there is no significant difference among the middle aged women. 2) Physical indices tend to increase according to age. Both BMI and RBW of women in their 50's are at their highest values, however, the index values of the women in their 60's decreased slightly (p<0.05). On the contrary, there is no significant difference in the percentage of body fat and total body fat content among the middle aged women surveyed. 3) According to this survey, 15.6% of the 422 subjects are assessed as being obese ; more specifically 4.4% of women in their 20's, 12.6% in 30's, 25.6% in 40's, 22.5% in 50's and 17.3% in 60's. 4) 39.4% among obese women proved to be upper body type women. Because the frequency of upper body type women became higher as the obese women aged, there is possibility that the pattern of fat distribution can change. 5) Weight is the most highly correlated with BMI(r=0.91), whereas weight as correlated with RBW, percentage of BF and WHR are 0.8, 0.66 and 0.44 respectfully. The conclusion of this survey is that it is better to estimate the value of total body fat and percentage of body fat than the value of BMI in the analysis of prevalence of obesity and its related factors of middle aged women.

• 동아시아식생활학회지
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• 제3권2호
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• pp.29-40
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• 1993

A variety of studies show that a centraized rather than a generalized pattern of subcutaneous fat distribution is more directly associated with disorers of carbohydrate and lipid metabolism, as possibly hypertension, This study was an attempt to observe the relationship of body fat distribution, blood lipids, blood pressure and exercise in 85 healthy men and women. Within this group there was a gradation of fat distribution progressing from LBSO and UBSO defined on the basis of WHR. This paper reports the relationship of body fat distribution defined by WHR to plasma glucose, lipids, blood pressure, and exercise in this population. Although the obesity indices(RBW and BMI) were slightly higher in the UBSO group, significant differences existed between UBSO and LBSO groups with respect to WHR blood pressure, and total cholesterol concentration in female. WHR values were substantially different and this was primarily due to greater degrees of differences in waist as opposed to hips circum ference. Although no significant differences existed between UBSO and LBSO groups with respect to age, body weight, and hips circumference, energy intake, total cholesterol, LDL-cholesterol and WHR values were substantially different in male. Positive, significant correlations were found between WHR and both systolic and diastolic blood pressure and between WHR and the total plasma cholesterol concentration and age. When 26 pairs of exercise and nonexercise groups were matched according to sex, age and body weight, blood pressure and blood lipids were significantly lower in the exercise groups than those in the nonexercise groups. In conclusion, these findings suggest that an altered blood lipid profiles will manifast in men and women with upper body obese. Furthermore these findings suggest that exercise and physical activity may be beneficial for controlling blood lipids and blood pressure in healthy adults.

• 한국전자파학회논문지
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• 제25권2호
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• pp.137-148
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• 2014

본 논문에서는 인체 부착형 Ultra-Wideband(UWB) Multiple-Input Multiple-Output(MIMO) 안테나를 제안하고, 인체의 영향을 고려한 안테나 성능과 인체에 미칠 수 있는 영향에 대한 분석을 하였다. 제안된 안테나는 사각 모노폴 형태의 두 안테나와 격리도 특성을 개선하기 위하여 안테나 사이에 위치한 plunger형 isolator로 구성되어 있다. 안테나의 근거리장에 인체가 존재할 때, 인체가 안테나에 미치는 영향을 분석하기 위하여 시뮬레이션과 측정을 수행하였다. 측정 결과, Specific Absorption Rate(SAR) 값은 공급전력 0.5 mW에서 안테나 1, 2 각각 0.132, 0.08 W/Kg으로 1 g 평균 전자파 흡수율을 1.6 W/kg으로 제한한 FCC 지침을 초과하지 않음을 알 수 있다.

• 복식
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• 제56권6호
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• pp.114-131
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• 2006

An Asian Ethnic Look is based on its own values of traditional costumes and the fashion accessories that are influenced by its own genre within their own culture. In this thesis, it contemplates the study of visual values and the traditional influences of the Modern Western Designers and Asian Designers' definitions and the considerations of an Ethnic look in the countries like Middle East, India, Korea, China and Japan. The standard procedure to understand their Visual and Aesthetic values is acknowledgement of body. From that foundation, an Asian Ethnic Look and its Visual and Aesthetic Values were researched through out the Middle East Asian Look, Indian Look, Korean Look, Chinese Look and Japanese Look which effective after 1990's. The studies are further researched to the comparisons and interpretations of the Western Designers and the Asian Designers, and the definitions of an Asian Ethnic Look and its Visual and Aesthetic Values in between those. According to each country's religious attitudes, a beauty of concealment and a beauty of negative space appeal which emphasize an ethics on humanity and non-materialistic attitudes. It takes meanings of a phenomenon of nature's worship, Yin-Yang five elements of principles, oneness of body-mind and oneness of universe-mankind. Following the studies of Visual and Aesthetic Values of an Asian Ethnic Look, in 1990's Western Designers' interpretations were prominent use of the Asian Traditional Motif3. However, the interpretations of the Asian Designers were based on their own traditional ethics and they minimized decorative elements but enhanced naturalism, feminism, calm and sober designs compare to the past. The Asian Designers' interpretations of their visual values were based on their Asian mentality, beauty and its straightforward genuine perspective and respects of their own culture.