• Korean Journal of Environment and Ecology
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• v.9 no.2
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• pp.182-186
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• 1996

The annual increasing rate of visitors was 9.5% in Odaesan National Park from 1989 to 1995. Ninety three percent of total visitor of Odaesan National Park has visited Woljongsa and Sogumgang area in which a motorcar access is convenient. Climbing rate of Pirobong(peak) were less seven percent of total cisitors at Woljongsa in summer and less twelve point six percent in autumn. Visiting pattern showed difference by area, seasons and a day of the week. Using rate of motorcars was higher in summer than in autumn

• Proceedings of the Korean Society of Precision Engineering Conference
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• 1995.10a
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• pp.247-250
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• 1995

The development and empirical validation of a mathematical model for predicting the depth of deformed layer in a machined surface are presented. The main assumption for develioping this model is that there is a linear relationship between plastic strain and the depth to which it extends. The model relates the work required to shear the workpice material to the work needed to compress the workpiece material ahead of the cutting tool. The results show that the percent difference between the calculated and the measured depth of deformed layer ranges form 4 percent to 19 percent. An improvement of the model is suggested through application of actual distribution data of plastic strain.

• Proceedings of the Korean Society of Agricultural Engineers Conference
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• 2005.10a
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• pp.294-299
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• 2005

The agricultural water demand that is calculated in present is difference with practical one by various situations in field. And, by various change, agricultural water demand can not estimate by agricultural land area simply. Considering various situations in field, calculated practical agricultural water demand and applied it to Korea Water Evaluation And Planing System (K-WEAP) in this study. The studied area is Seongju. The studied results showed that agricultural water demand calculate about 5.8 percent higher than existing one, and the agricultural water demand that is applied to K-WEAP calculate about $4{\sim}5.5$ percent higher. Total Agricultural water demand increased about 0.5 percent until 2011.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2014.11a
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• pp.57-58
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• 2014

For durability design to protect against chloride-induced corrosion, it is important to estimate the amount of chlorides on the surface. However, it is difficult to estimate the airborne chlorides, a boundary condition, due to the difference between the amount of chlorides attached to a surface of an actual structure and that in the air. Therefore, in this study the attachment rate analysis of airborne chlorides was evaluated for 13 types of finish materials. As a result, despite differences in the amount of airborne chlorides according to the finishing type, it was found that 60 percent of airborne chlorides were attached to mortar, 30 percent were attached to steel, and 25 percent were attached to tiles compared with the amount of chlorides in the air.

• Journal of Preventive Medicine and Public Health
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• v.19 no.2 s.20
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• pp.293-306
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• 1986

A Health Interview Survey at Chuncheon city was conducted to assess level of illness by stratified random sampling method. Sample size was 6,007 and the prevalence of illness in period of 15 days was studied. 1) Prevalence rate of illness among Chuncheon citizen was 20.8 percent, and that of acute condition was 10.8 percent and chronic condition, 10.0 percent. 2) There was significant difference in prevalence rate by sex, especially the prevalence rate of chronic illness. 3) High positive correlation was noted between aging and prevalence rate of chronic illness. But negative correlation was noted in case of acute illness. 4) Multiple regression analysis on morbid state by socioeconomic variables was not seen to be appropriate for this survey, especially the analysis of acute illness. 5) Estimation of anual prevalence rate could not be possible because of seasonal variation of disease prevalence.

• The Korean Journal of Food And Nutrition
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• v.23 no.4
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• pp.453-461
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• 2010

The purpose of this study was to evaluate nutrient and food intake status and dietary, quality according to obesity based on nutrient and food group intake, in female university students. Surveys were conducted using questionnaires and 3 days, dietary record in 360 female university students residing in Seoul. The subjects were divided into two groups by percent of body fat: an overweight group(percent of body fat more than 23%, n=249) and normal group(percent of body fat below 23%, n=111). The overweight group had a larger proportion of subjects who binged compared to the normal group. There was no significant difference in energy intake between the two groups. The densities of plant calcium and dietary fiber in the overweight group were significantly lower than those of the normal group. However, animal fat density was significantly higher in overweight subjects. The Korean's dietary diversity score(KDDS) of the overweight group was 4.65, and that of the normal group was 4.67, indicating no significant difference. There was no significant difference of DQI-I between the overweight group(50.8) and normal group(51.1). However, the macronutrient ratio score was significantly lower in the overweight group. These results indicate that overweight female college students may have improper dietary habits, and have lower overall balance aspect macronutrient ratios.

• Korean Journal of Child Studies
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• v.33 no.4
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• pp.107-127
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• 2012

This study investigates the factors influencing service outcomes of group homes and residential care centers, as well as the factors causing any differences between the two service outcomes. 119 and 137 5-6th graders were selected from group homes and residential care centers respectively, using the cluster sampling method. Multiple regression and Blinder-Oaxaca decomposition were used in this study. The results revealed that 'stigma', 'school adjustment', and 'social support' were significant factors influencing service outcomes among children in group homes, while 'stigma', 'primary caregivers' attitude', and 'peer relations' were identified as significant factors among children in residential care centers. The study also found that the mean service outcome score for group homes was higher than that of residential care centers. The 74 percent of this difference in the mean scores was due to the difference in children' characteristics of the two out-of-home care service types. The remaining 26 percent of this difference was due to unobserved characteristics. Finally, the implications of this study in child welfare practices were also discussed.

• Journal of Korean Public Health Nursing
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• v.14 no.1
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• pp.1-11
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• 2000

The purpose of this study was to examine self-esteem and toothbrushing behavior in college students. The research was conducted from August 26 to September 16. 1999. Totally 1003 students consisted of whom 875 in college and 128 in university were surveyed. Questionnaires including period. frequency. method. and time of toothbrushing and self-esteem were obtained. The data were analysed by descriptive statistics. t-test, Pearson Correlation Coefficient and ANOVA. A significant level of statistical difference was 5 percent. The results were summarized as follows: 1. The average score of self-esteem was $28.358\pm4.928$. 2. The average score of toothbrushing behavior $52.63\pm11.12$. 3. 54.8 percent of the students who were surveyed reported that they brushed their teeth after breakfast and after dinner. 42.9 percent did so twice a day. and 50.2 percent did Rolling method. 4. The Pearson Correlation Coefficient between the self esteem and toothbrushing behavior showed a positive correlation(p=.005), 3. The level of self-esteem was significantly varied with toothbrushing period (p=.000), toothbrushing frequency (p=.020)' and toothbrushing time (p=.003). From the above findings. we found out self-esteem might play a significant role in mediating changes in oral health behavior.

• Korean Journal of Organic Agriculture
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• v.27 no.4
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• pp.425-436
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• 2019

This paper analyzed the necessity of family management agreement in management succession and the intention of signing it. To this end, 139 management successors were surveyed and the factors affecting the family management agreement were analyzed. The main analysis results are as follows. Firstly, Priority in the management agreement system was the highest participation in decision-making with 34.5 percent, or 19 people, followed by the sharing of management roles and the distribution of revenues and expenses with 27.3 percent, respectively. Secondly, An analysis of the difference between cohabitation with parents and the need for a family management agreement showed that 70.2 percent of successors and 51.7 percent of non-residents shared the opinion that a family management agreement is needed. Finally, according to the analysis, the lower the age of the heirs, the higher the willingness to sign the family management agreement, the more likely the successor who graduated from a related university in the agricultural industry, and the more likely the successor who is a farmer in an urban area, the more willing he is to sign the family management agreement.

• Korea journal of population studies
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• v.9 no.2
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• pp.42-52
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• 1986

An attempt had been made to obtain current information on induced abortion among currently married women aged 15 to 44. The source of data was 1985 National Fertility and Family Planning Survey conducted by Korea Institute for Population and Health in may 1985. 1. At the time of the survey, 53 percent of currently married women aged 15 to 44 had experienced induced abortion: 25.5 percent of the respondents who had experienced induced abortion only one time and another 27.6 percent more than two times. 2. The proportion of women who had experienced induced abortion seemed to increase according to the advance in age. It seemed that there was no significant difference in the experience rate of induced abortion by academic career, and there was inverse relationship between the experience rate of induced abortion and the age at first marriage. The experience rate if induced abortion by the number of living children was highest among those who had three children as 65.6 percent. 3. To analyze the effect of induced abortion on fertility, this study employed multiple regression analysis as a statistical technique. Instead of index representing fertility level the number of living children served as dependent variable. Independent variables used in analysis included age, age at first marriage, education level, ideal number of children, religion, frequency of induced abortion, total number of pregnancies and participation in labor force. Standardized partial regression coefficient of induced abortion was no less than -0.61. So, it can be concluded that induced abortion offered the great contribution on the birth control. A consistant health education and efficient management of family planning program would be essential for effectiveness of contraceptive practice.