• Journal of Korean Society of Transportation
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• v.34 no.5
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• pp.449-464
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• 2016

The purpose of this study is to test applicability of cut-through roundabouts at a congested intersection and to provide the traffic volume ranges for theirs application. Various test scenarios were developed according to variation of total traffic volume, left-turn ratio to total traffic volume, and ratio of major road traffic volume to minor road traffic volume. In addition, three intersection types of cut-through roundabout, roundabout, and signalized intersection were compared with respect to delay times for each scenario, resulted from the simulation using VISSIM. In case of the ratio of major road traffic volume to minor road traffic volume, 6:4, the delay times of cut-through roundabout decreased up to 30% of left-turn ratio to total traffic volume for 400vphpl, up to 20% for 500vphpl, up to 10% for 600vphpl. In case of the ratio, 7:3, they are the same as 6:4 for 400vphpl, 500vphpl, and 600vphpl but they decreased up to 30% for 300vphpl and up to 10% for 700vphpl. In case of the ratio, 8:2, they are the same as 7:3 for 400vphpl, 500vphpl, and 700vphpl but they were reduced by 10% to 30% for 300vphpl and 20% for 600vphpl. It is concluded that the smaller left-turn ratio to total traffic volume as well as the ratio of minor road traffic volume to major road traffic volume is, the more effective in reducing delay times the cut-through roundabout is. Cut-through roundabouts can be expected to reduce delay times at a signalized intersections with traffic conditions above-mentioned.

• Journal of Oral Medicine and Pain
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• v.15 no.1
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• pp.9-25
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• 1991

타액의 유동학적 성질은 타액의 윤활작용 및 구강내 경조직, 연조직 보호작용에 영향을 미친다. 그러므로 타액의 유동성을 잘 이해하면, 구강내 기능적 불편감의 평가와 인공타액의 개발에 필요한 중요한 정보를 얻을 수 있다. 저자는 전단율 변화에 따른 타액점도 변화의 연령 및 성별에 따른 차이를 알고자, 각 연령층별로 구강건조증으로 고통받은 병력이 없으며 타액채취시 약물을 복용하고 있지 않은 남녀 각 20명씩 총 240명을 대상으로 자극시 분비된 타액의 점도를 cone-and-plate 형태의 점도계를 이용하여 전단율 11.3에서부터 450.0(/sec )사이에서 측정하였다. 또, 20대 남녀 각각 20명의 경우, 자극시 분비 된 전타액의 점도와 함께 비자극시 분비된 전타액, 자극시 분비된 이하선 타액, 자극시 분비된 악하선 설하선 혼합타액의 점도를 같은 방법으로 측정한 결과 다음과 같은 결론을 얻었다. 1. 타액은 점탄성의 성질을 가지는 non-Newtonian 유체로서 점도와 전단율 사이의 관계는 점근선으로 표시될 수 있었다. 2. 자극시 분비된 전타액의 점도는 연령이 높을수록 증가된 양상을 보였으나, 남자의 경우 50대 이상에서 가장 높고 여자의 경우 30대에서 가장 높았다. 3. 자극시 분비된 전타액의 점도는 20대, 30대, 40대에서 여자가 남자보다 높았다. 4. 타액 점도는 자극시 분비된 악하선 설하선 혼합타액에서 가장 높았으며, 비자극시 분비된 전타액, 자극시 분비된 전타액, 자극시 분비된 이하선 타액 순이었다.

• Journal of the Korean Home Economics Association
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• v.42 no.12 s.202
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• pp.141-160
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• 2004

This study investigated the divorce and post-divorce adjustment of divorced men and women in their 20s and 30s and explored the sex differences. For this empirical analysis, the data was collected from 230 divorced men and women in their 20s and 30s who lived in the Seoul metropolitan area from Sep. 23rd to Oct. 20th, 2002. The questionnaire for the survey dealt with demographic information and other scales. The major findings of the research project were as follows: First, although men and women experienced a similar level of pre-divorce conflicts, women were more likely to want to divorce. Second, although women had worse physical and psychological condition and more difficult problems than men after divorce, women more readily accepted their divorce reality than men. Divorce was not the best but the second best way to escape from a bad marriage for women. The results of the current research are expected to contribute to the pre-marital preparation and divorce adjustment programs.

• Journal of Life Science
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• v.29 no.1
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• pp.45-51
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• 2019

This study is to investigate the effects of the physical activity and intake of improved food levels on male body compositions. Forty men were assigned to a percentage of body fat (PBF) group (20 men with physical exercise and food) and CONTROL group (20 men with exercise, food intake is free) for this six-month study. An aerobic capacity test to measure maximum oxygen consumption ($VO_2$ max) was performed to precisely determine the exercise intensities during the experimental conditions. After exercise and food control, the body weight of 20s with exercise and food (A) and only exercise (B) decreased about 2.3 kg and 0.4 kg after 6 months, respectively. If the p-values were 0.697(between baseline and 3 months), 0.535(between 3 months and 6 months), and 0.617(between baseline and 6 months), respectively, then 20s men had evidence of that a significant main effect does not exist amongst the observations of the outcome or within-weights. Their skeletal muscle mass (SMM) of both groups increased slightly through exercise. Although the decrease in total body weight of 30s was correlated with the increase in SMM, there was not shown significant. While total body water decreased in 20s, 40s, and 50s except 30s men, all other values did not shown significant differences. The physical activity and intake of improved food levels were contributed with lost a lot of weight, decrease of SMM and body fat.

• Journal of Korean Ophthalmic Optics Society
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• v.6 no.1
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• pp.71-76
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• 2001

In this study, the variation of astigmatism axis according to the age was studied 4227 eyes of healthy eyes. The refractive errors were measured by objective and subjective refraction. The astigmatism among the total eyes was 76.5%. With-the-rule, against-the-rule and oblique astigmatism were 51.4%, 31.7% and 16.9%, respectively. The frequency of with-the-rule was the highest and against-the-rule was the lowest of all the astigmatism in the refractive error. In relation to the age and astigmatism, the with-the-rule was 68.3% in the 10's age group which was the highest among the astigmatism and the against-the-rule was 10.3% in the 50's age group and upward which was the lowest among the astigmatism. The difference in the with-the-rule and against-the-rule ratio was a little in the 30's age group. As they aged, the tendency of the with-the-rule was increased between 10's and 20's age group continually. And the tendency of the against-the rule was increased between 30's and 50's age group and upward. There was a decrease in with-the-rule and an increase in against-the-rule, with the age increase. The oblique astigmatism relationship to age could not be determined.

• Journal of the Korean Society of Food Science and Nutrition
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• v.36 no.3
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• pp.318-326
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• 2007

The purpose for this study was to investigate the health status according to the age and BMI by interviewing male workers in their twenties and thirties in the Daegu Gyeongbuk region. The body measurement was assessed by height, weight, BMI, body circumference (waist, hip), waist-hip ratio and body fat mass. The health status has been analyzed and assessed as normal group, health concerned group and health suspected groups. Weight, percent ideal body weight (PIBW), BMI and body circumference (waist, hip) and waist-hip ratio was proven higher according to the order of obese group, overweight group and normal group. Waist-hip ratio was proved to be higher in the thirties group than the twenties. Body fat mass was higher in the obese, overweight and normal groups. In the concerns of health status, the ratio of health concerned group and health suspected group increased according to the increase of BMI. Blood pressure (SBP, DBP) was higher in the obese group than in the normal group and overweight groups, and blood glucose was higher in the thirties than in the twenties. SGOT, SGPT, ${\gamma}-GTP$ has been proven higher in the obese group than in the normal group and overweight group, ${\gamma}-GTP$ was higher in the thirties than in the twenties. Investigating the correlation of the anthropometric characteristics and biochemical characteristics, the heavy weight resulted in heavier BMI, PIBW, body circumference (waist, hip), waist-hip ratio and higher body fat mass. Blood pressure (SBP, DBP), total cholesterol, blood glucose, SGOT, SGPT and ${\gamma}-GTP$ all became higher according to these influences. In conclusion, male workers have to recognize that health status becomes worse and possibilities of chronic disease prevalence rate increases according to aging and the increase of BMI. Accordingly, it is necessary to make an effort to prevent chronic diseases.

• 건강소식
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• v.35 no.3
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• pp.30-31
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• 2011

20대는 사회활동이 왕성한 시기로 스트레스, 운동 부족, 불규칙한 생활로 몸에 이상이 생기기 시작하는 시기다. 또 졸업과 취직, 직장생활, 출산과 육아 등 긴장의 연속인 생활을 하면서 술, 담배, 스트레스 등으로 몸이 혹사당하는 시기이기도 하다. 3월에는 20대의 건강검진에 대해 알아본다.

• Proceedings of the Korean Information Science Society Conference
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• 2008.06b
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• pp.286-291
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• 2008

현재까지의 컴퓨터그래픽스 기술은 물체의 시각적 표현에만 집중되어 왔다고 할 수 있다. 그러나 컴퓨터그래픽스 기술의 발전으로 앞으로는 3차원 데이터가 단지 표현에만 그치지 않고 모든 분야에서의 물체 해석과 예측 시뮬레이션 정보처리에서 활용되어 갈 것이다. 본 논문에서는 3차원 얼굴 데이터를 이용하여 사람의 나이에 따른 얼굴의 변화를 시뮬레이션한 결과를 소개한다. 20대, 30대, 40대, 50대의 3차원 얼굴 데이터로부터 60대의 얼굴을 예측하는 방법을 소개한다. 동일한 인물의 20대부터 50대까지의 실제 얼굴 데이터를 얻는 것은 어려운 일이므로 본 연구에서는 20대의 얼굴데이터만을 가지고 50대까지의 얼굴을 추측하여 생성한 후에 60대의 얼굴을 예측하는 방법을 제공한다.

• Journal of the Korean Society of Clothing and Textiles
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• v.40 no.2
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• pp.342-352
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• 2016

This study examined the fashion culture of 20-30s working women through clothing norm relationships in the workplace. A literature research was conducted along with qualitative research, in-depth interviews in order to understand the domestic working environment and fashion culture such as lifestyle and consumer culture characteristics of 20-30s working women. The results were: First, it showed that the increased number of members having various inclinations caused subcultures through an increase of women's economic activities and transition to a knowledge-information society in domestic work places that changed into a business casual that recognized employees' autonomy and diversity. Second, in the working place, clothing norms coexist as stipulated by statutes, company rules, and official documents as well as others implied by experiences of sanction against members. Workplace closing norms are classified into norms of exposure that draw attention to clothes and casual clothes. Third, it showed that factors pressuring clothing norms are classified as external pressures and by spontaneous self-censorship that cause conflict and confusion with working women's fashion according to the degree of pressure. Two kinds of pressure by others (or types of departments and members) were observed.

• Journal of the Korean Institute of Landscape Architecture
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• v.44 no.3
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• pp.37-46
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• 2016

This study intends to analyze the characteristics of imageability elements of the tourism space using the spatial cognitive mapping method. For this purpose, this study selects Nami Island as a study site and collects spatial cognitive maps or sketches of the study area focused on tourists in their 20s and 30s after they visit the site. The results of frequency analysis on imageability elements of Nami Island show that paths, landmarks, and edges are more frequently cognized to tourists in their 20s and 30s than districts and nodes. This study determines a new imageability element of the tourism space, "moving objects," such as or bikes or animals. Tourism planners or landscape designers can consider these useful imageability elements as important planning factors in order to improve and clarify the images of tourism spaces.