• Proceedings of the Korea Water Resources Association Conference
• /
• 2011.05a
• /
• pp.373-373
• /
• 2011

Korean Government has been promoting Four River Restoration Project (i.e., Han, Geum, Nakdong, and Yeongsan rivers) since the second half of 2008. This project is expected to protect against floods and droughts by water resources management. Many researchers have study water resources management, but most studies were focused on direct runoff. However, in order to efficiently protect against floods and droughts, baseflow should be studied as well as direct runoff. Because baseflow has a great effect on streamflow, it needs to be correctly analyzed. For more accurate analysis of baseflow, direct runoff and baseflow from streamflow should be separated first. In this study, 12 flow gauging stations of four major rivers were selected, and flow data from them were obtained (2004-2010) through WAMIS and Web-based SWAT Bflow system (http://www.envsys.co.kr/~swatbflow) which was used to separate direct runoff and baseflow. Baseflow values of Pass 2 in SWAT Bflow system were used. As a result of this study, baseflow contribution was ranged from 23.4% to 68.6% and accounted for about 50% of streamflow. Through this study, it shows that in the case of the flow fluctuation, baseflow is more affected than direct runoff by changes in streamflow in a flood or dry season. Thus, baseflow estimation should not be overlooked for efficient water resources management. However, it has a limitation in this study that because this study used to select randomly 12 flow gauging stations, it did not show a common tendency on each watershed. It is important that flow gauging stations reflected on topographic characteristics of each watershed should be selected in a rigorous manner for further reliable and accurate baseflow estimation on four major rivers.

• Journal of The Korean Society of Integrative Medicine
• /
• v.7 no.3
• /
• pp.149-157
• /
• 2019

Purpose : This study aims to check the relationship between the size of curvature in scoliosis patients and the reduction rate of curvature after wearing a brace and the relationships of the size of curvature and correction angle with Body Mass Index (BMI). Methods : With 30 adolescent girls who had never worn a brace, their Cobb angle and BMI were measured before manufacturing braces, and their corrected Cobb angle was measured after wearing the manufactured scoliosis braces. Results : The size of the major curvature before wearing the brace and the reduction rate of the curvature after putting it on had a negative correlation in both the major curvature (r=-.465, p<.01) and the minor curvature (r=-.516, p<.01). The size of the minor curvature and the reduction rate of the minor curvature before and after putting it on also had a negative correlation (r=-.429, p<.05). As for the relationship between the size of curvature and BMI, they had a negative correlation in both the major curvature (r=-.141) and the minor curvature (r=-.123), and as for the relationship between the reduction rate of curvature and BMI after wearing the brace, they had a positive correlation in both the major curvature (r=.251) and the minor curvature (r=.136); however, it was not statistically significant (p>.05). Conclusion : In conclusion, the larger the size of curvature, the lower the reduction rate of curvature after wearing the brace became. The larger the size of curvature, the lower the BMI became. The higher the BMI, the higher the correction ratio of the brace became. Therefore, it is judged that it is necessary to provide early treatment and manage body composition before scoliosis progresses.

• Proceedings of the KSR Conference
• /
• 2000.11a
• /
• pp.142-149
• /
• 2000

It is required that the indoor-noise level of KHST (Korean high speed train) should be lower than 66 ㏈(A) at 350 km/h. In this study, the indoor-noise level of KHST has been predicted to determine the maximum allowable sound power levels of major noise sources. It is found that the indoor-noise requirement for KHST can be met by increasing the transmission losses of the floor and side-wall structures as well as by lowering the sound power levels of two major noise sources including the motor fans.

• Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference
• /
• 1998.10a
• /
• pp.82-90
• /
• 1998

Machines that normally operate under fluid film lubricated condition also experience surface damage. This is largely due to the failure of the lubricant film which leads to boundary lubrication. Thus, it is important to have a good understanding of boundary lubrication behavior. In this paper the major tribological parameters that influence the boundary lubrication properties are evaluated. It is shown that disk roughness, hardness and normal load affect the friction and wear of metals in boundary lubrication. Also, the mechanism of surface damage is attributed to abrasion and wear particle interaction.

• The Journal of the Korea Contents Association
• /
• v.17 no.3
• /
• pp.454-461
• /
• 2017

The Four Major Rivers Restoration Project was the multi-purpose green growth project on the four major rivers in South Korea. However, the Four Major Rivers Project has attracted significant criticism from various social groups and wider international groups, e.g. Friends of the Earth. This study reviews the four river restoration project from the standpoint of an evolutionary process of water paradigms. It reveals that the project has achieved its intended purpose yet, suggesting to apply some valuable lessons in the consideration of the integrated watershed management system. Finally, it urges to introduce tentatively named "Basic law on Water Management" preceded by enacting ordinances at local level, because it'll help us find out ways ahead for the Integrated Water law.

• Journal of Korean Clinical Health Science
• /
• v.1 no.2
• /
• pp.49-57
• /
• 2013

Purpose. This study was purposed to seek for a way to enhance the self-efficacy of students in dental hygiene department at deciding their careers by analyzing the relationship between the self-efficacy and the major satisfaction. Methods. The investigator conducted a survey targeting 253 students attending on dental hygiene departments in two 3-year-graduate colleges and 1 university located in Busan from May 1st to May 30th, 2013. The used research instruments were the major satisfaction questionnaire and the Career Decision-Making Self-Efficacy Scale Short Form(CDMSES-SF). The survey was conducted in self-administered questionnaire. The data was analyzed with SPSS (ver 12.0) and also conducted t-test, ANOVA and multi-regression analysis. Results. It was found that self-efficacy level of students in dental hygiene department was $3.22{\pm}0.38$ point, and their major satisfaction level was $3.27{\pm}0.47$ point. The factors enhancing the self-efficacy of students in dental hygiene department at deciding their careers were identified as the curriculum satisfaction, the relationship satisfaction, and the recognition satisfaction. It was identified that more these elements were increased, the higher the self-efficacy level was enhanced. Conclusions. In order to enhance the self-efficacy of students in dental hygiene department at deciding their careers, it is considered that the curriculum should be organized carefully under reasonable plan, and there should be more active communication between professors and students as well as students each other. Besides there needs some educational programs to inspire the pride and sense of duty for the dental hygiene department.

• The Korean Journal of Food And Nutrition
• /
• v.5 no.2
• /
• pp.116-122
• /
• 1992

This survey was carried out to investigate the effect of self-consciousness of nutrition knowledge and health on the nutrition knowledge and on food habits between two groups of college women, a nutrition majors and a non-majors. Questionnaires were completed by 214 nutrition majors and by 145 nutrition non-major, Nutrition majors group scored significantly higher than nutrition non-majors in the nutrition knowledge. And nutrition non-majors scored significantly higher than nutrition majors in the food habits. Most of the subjects belonged to 'Fair' and 'Poor' food habit group. And also there was a significant correlation between the nutrition knowledge score and food habits score in nutrition majors and non-majors. There was a significant and positive correlation between nutrition knowledge score and food habits score in majors but it was not observed in non-majors. The higher majors had a self-consciousness of nutrition knowledge, the higher they had habit score and nutrition knowledge score, but in non-majors it was not observed. And non-majors who had a self-consciousness of health were healthier, they were higher in the food habits scores than the jai ors. The main curriculum it is important for a good food habits that one has a responsible nutrition education in main curriculum. For the Improvement of nutrition education program we should transmit the nutritional information through an effective mass media (i.e. Radio, TV, Newspaper).

• Journal of Engineering Education Research
• /
• v.13 no.6
• /
• pp.80-86
• /
• 2010

The purpose of this study is to explore the factors that influence the choice of a major in a sample of 655 science students enrolled in 14 high schools. It was found that more than 80 percents of students had already chosen their desired majors by the second year of high school. Half intended to apply for medical colleges. The preference of medical colleges was more pronounced in high-ranking students. It was found that students who scored highly on career decision level assessments were more likely to major in science. The most important determinant for students in choosing majors was subject interests. Career concerns and students' grades also influenced the choice of majors. In this study, it is concluded that the career decision level of students and subject interests influenced their choice of major. These findings suggest the career development programs and efforts to expose students to various career paths will increase the ability to make informed educational decisions.

• Journal of Digital Convergence
• /
• v.15 no.1
• /
• pp.497-507
• /
• 2017

The purpose of this study was to investigate the relationship among major satisfaction, career preparation behavior and career sense maturity of sports-related university students. To achieve the objective of this study 221 students in sports-related university were investigated with convenience sampling method. Frequency analysis, exploratory factor analysis, confirmatory factor analysis, correlations analysis and structural equation model analysis were executed using SPSS Statistics v21 and SPSS Amos v21. As the results, the following conclusion was derived. First, it was discovered that the major satisfaction had static influence to the career preparation behavior. Second, it showed that the major satisfaction gave static influence to the career sense maturity. Third, it showed that the career preparation behavior affected the career sense maturity.

• Journal of the Korean Society of Food Culture
• /
• v.9 no.3
• /
• pp.289-301
• /
• 1994

The purpose of this study was to investigate housewives' perception, interest and consumption of organic food, and to identify the variables influencing on them. The sample was selected from 411 housewives living in Seoul from 1st of September to 20th of September in 1993. Used statistical methods were frequency, percentage, mean, Cronbach's ${\alpha}$, factor analys, ANOVA, Duncan's multiple range test, t-test, correlation, regression analysis and Path analysis. The major results are as follows: 1) Housewives' perception degree of organic food in its variety, easy availability and contribution to health was relatively high level, but price level, reliability and packing condition was somewhat low level. Out of housewives' many images of organic food, taste health care, quality and necessity factors can be implicated. 2) Housewives' interest degree of organic food is somewhat high level 3) Housewives' consumption degree of organic food was relatively low level and was affected by their perception of oraganic food. 4) Frequency to use seasonings was the major independent variable which influenced to housewives' perception degree of organic food, while recognition on enviornmental contamination was the major independent variable which influenced to their interest degree of organic food, and their total perception on organic food was the major independent variable which influenced to their consumption degree of oragnic food. Therefore, it is considered that their total perception to it can decide the demand of organic food 5) Housewives' perception and interest degree of it was the major intervening variable which influenced to their consumption degree of oragnic food.