• International Journal of Safety
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• 제7권1호
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• pp.35-38
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• 2008

The purpose of this study is to extract typical body shape of Korean VDT workers based on the three-dimensional Korean shape data and recommendation supported by Korea Occupational Safety & Health Agency during VDT task. Desirable desk heights and chair heights for the selection of the VDT working posture is proposed by analyzing moment, compression and joint shear for lumbar and spine of Korean adult(male and female). The desirable heights for desk and chair can be selected by the least load method during VDT tasks. In the current work the figures of Korean 50th percentile offered by CATIA-HUMAN are used as the average body type of the grown-ups and this research is accomplished with the recommended size of all working attitude such as the height of a monitor except for the height of desk and chair and the degree of watching the monitor.

• 대한가정학회지
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• 제43권8호
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• pp.25-35
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• 2005

The purpose of the study was to investigate the relationship between parenting stress and, parenting efficacy and on parenting behaviors in mothers with young children. Ed. Note: confirm wording. A total of 222 mothers, each having children aged three to five, participated in the study. The data were analyzed through frequency, percentile, mean, standard deviation, Pearson's correlation, and multiple regression analysis. Results of this study indicate that parenting efficacy and stress were significantly related to parenting behaviors. The relationship between the mother's parenting stress and parenting behaviors was mediated by the mother's parenting efficacy. In conclusion, the mother's parenting efficacy and a perception of parenting stress turn out to be important factors in predicting parenting behaviors.

• 대한가정학회지
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• 제42권8호
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• pp.33-48
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• 2004

This study investigated the quality of after-school programs focused on artistic-physical activities, children's emotional regulation and social competence. The subjects were 224 elementary school children (1st through 6th grades) and 41 teachers. The measures were questionnaire(after-school activities), Assessment Profile for Early Childhood Programs(school-age), the Emotional Regulation Scale. and the Social Competency Scale. The data were analyzed by Cronbach's a, frequency, percentile, mean, and t-test. The results indicated that emotional regulation and, social competence were significantly different according to the quality of after-school programs： Children in a higher group of curriculum quality and interaction with teacher had better emotional regulation than did children in a lower group. Children in a higher group of curriculum quality and scheduling had better social competence(leadership and competence) than did children in a lower group.

• 대한가정학회지
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• 제35권5호
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• pp.265-277
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• 1997

The purpose of this study are to identify the type and the amount of household's individual retirement account for retirement fund and to investigate the factors contributing to a individual pension account holding and an assessment. Data used in this study consisted of 2,667 households from 1994 KHPS. Statistics employed to analyze the data are Mean, Frequency, Percentile, Logistic and OLS. the result of this study were as follows; Among 2,677 households' 426 households(15.9%) owned the individual retirement account. Most household heads with individual retirement fund are the salaried and self-employed. More households with individual retirement account have saving account, stock than those without individual retirement account. Age, occupation of household head, total income, stock ownership had significant effects on whether household having individual retirement account. And Age of household head, net worth, saving account ownership had significant effects on the assessment of individual retirement account holding.

• 대한기계학회논문집A
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• 제33권8호
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• pp.799-806
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• 2009

Thoracic injury from restraint loading is the principle causative factor of death, which was shown to be particularly significant for older drivers. To characterize thoracic response to belt loading of older drivers, detailed finite element models of the adult and aged thorax were developed. The geometry of the 50th percentile adult male was chosen for the adult FE model. The thoracic FE model was validated against data obtained from results of PMHS pendulum impact tests. The quantified patterns of age-related shape and well-established material changes were applied to the adult model to develop the aged model. Belt force and chest deflection were applied to the developed two types of models. Rib and clavicle fracture risk obviously increased in the aged model. This finding showed that larger rib angle and reduced material properties of the ribcage produced more higher risk of injury in the older driver.

• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2014년도 추계 종합학술대회 논문집
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• pp.411-412
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• 2014

The objective of this study was to evaluate relationships between the economic status and the oral health status. Data were obtained from the National Health Insurance Corporation database. The prevalence of dental caries and tooth loss were compared among the ten-percentile according to the level of the monthly income. The prevalence of dental caries and tooth loss were lower in the high level of monthly income than low level of monthly income group. There was a significant relationships between the economic status and the oral health status.

• 한국지역사회생활과학회지
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• 제14권1호
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• pp.1-12
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• 2003

The purpose of this study was to investigate the maternal parenting stress and related variables through early childhood in rural areas (Iksan and Kimpo). The subject were 134 mothers who have less than 5-year old children. The statistics used for this data were freguency, percentile, t-test, ANOVA, and multiple regression analysis. The main results obtained from this study were as follows. The degree of maternal parenting stress differed according to level of mother's education, sex of the child, physical and mental health of the mother, child rearing attitudes, mother's level of self-differentiation, marital satisfaction, and father's parenting support. Results of the regression analysis that the etiologic model of this study were that father's parenting support is the most effective variables in rural areas.

• 환경위생공학
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• 제3권1호
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• pp.75-85
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• 1988

An atomic absorption spectrophotometry analysis study of zinc, cadimium, lead, copper and mercury in human scalp hair samples of 699 subjects in 3 urban and 4 rural communities gave mean values of 170.33/187.00 ppm, 0.18/0.22 ppm, 8.43/8.62 ppm, 9.81/10.24 ppm and 2.13/1.20 ppm for male and female, respectively. The concentration did not differ significantly regardless ages. However, female was higher than male in overall concentration except that of mercury. The percentile methods was partially applied for a reference values of metals in Korean scalp hair to provide more appropriate data for further comparisons.

• 대한교통학회지
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• 제12권2호
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• pp.47-63
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• 1994

The purposes of this study are to identify Traffic Flow characteristics and to develop approach delay model of unsignalized intersection based on the travel speed in the conflicting area. The results of this study are as following ; 1. The cumulative frequency distributions of Left-turning speed show a few differences among approaches and they are distributed to lower range of speeds. On the other hand, those of through speed show obvious differences among bounds. The similar results also show in the analysis of Percentile speed. 2. The effectiveness of conflicting movements to travel speed in the conflicting area are analyzed using regression analysis. Left-turning speed model shows that Left-and Right-Conflicting speed. Through-speed model is also developed, when approaching through volume is less than 420vph. 3. Since the lost time due to the acceleration stop, and decelerlation is occured in the conflicting area, approach delay model is delivered using the travel speed models under the condition of small queuing delay.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2008년도 추계학술대회 논문집
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• pp.262-267
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• 2008

The long-term wind data are reconstructed from the short-term meteorological data to design the 4 MW offshore wind park which will be constructed at Woljeong-ri, Jeju island, Korea. Using two MCP (Measure-Correlate-Predict) models, the relative deviation of wind speed and direction from two neighboring reference weather stations can be regressed at each azimuth sector. The validation of the present method is checked about linear and matrix MCP models for the sets of measured data, and the characteristic wind turbulence is estimated from the ninety-percent percentile of standard deviation in the probability distribution. Using the Gumbel's model, the extreme wind speed of fifty-year return period is predicted by the reconstructed long-term data. The predicted results of this analysis concerning turbulence intensity and extreme wind speed are used for the calculation of fatigue life and extreme load in the design procedure of wind turbine structures at offshore wind farms.