• Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference
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• 2004.11a
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• pp.99-107
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• 2004

Lubrication characteristics between a cylinder block and a valve plate for high speed bent-axis type hydraulic pump play an important role in volumetric efficiency and durability of pump. In this paper, a finite element method is presented for the computation of the pressure distribution between a cylinder block and a valve plate for high speed bent-axis type hydraulic pump. Also, a Runge-Kutta method is applied to simulate the cylinder block dynamics of three-degrees of freedom motion. From the results of computation, we can draw two major conclusions. One is related to the fluid film characteristics between a cylinder block and a valve plate and the other is related to the average leakage that is determined by the pressure gradient and the clearance near the discharge port. The numerical results of cylinder block dynamics were compared with the experimental results using eddy-current type gap sensors those are fixed at a pump housing.

• The Journal of Korean Society for School & Community Health Education
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• v.20 no.1
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• pp.29-41
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• 2019

Objects: This study examined the relations among college students' personality characteristics, drink motivation, and drinking behavior. This study also examined the mediating effect of drink motivation on the relationship between college students' personality characteristics and drinking behavior. Methods: The subjects of this study were 210 college students(male: 50, female: 160) attending a university in Chungnam. College students completed the personality characteristics, drink motivation, and drinking behavior scales. The data was analyzed by means of Pearson's correlation coefficients and regressions. Results: Results indicated that college students' neuroticism and extroversion were significantly related to drinking behavior. Also, college students' social motivation and coping motivation were significantly related to drinking behavior. Especially, social motivation fully mediated the relationship between college students' neuroticism and extroversion and drinking behavior. Coping motivation fully and partially mediated the relationship between college students' neuroticism and extroversion and drinking behavior. Conclusions: In this study, the personality characteristics directly influence the drinking behavior, but they found the influence on the drinking behavior through the drink motivation. In particular, it is very necessary to intervene in the development of health education programs that can intervene in drink motivation for college students with neurotic characteristics.

• The Journal of Korean Society for School & Community Health Education
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• v.16 no.2
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• pp.59-67
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• 2015

Objectives: To study about cognitive degree of drinking evil of the department of nursing science students in a partial area. Methods: The data were collected by questionnaire from the 249 nursing science students. The analysis of the data was used by SAS program(ver. 9.2). Technical statistics analysis was used in general characteristics and drinking related characteristics and cognition of objects. T-test was used in cognitive degree of social evil by drinking as characteristics of objects. Logistic regression was used in factors affecting on cognitive degree of social evil by drinking. Results: Cognitive degree of social evil by drinking was low as more drinking related outlay expenses and was high as more moderation in drinking and publicity experience. Conclusions: University and the government authorities must consider the serious and importance of the problem and enforce moderation in drinking and publicity for nursing science students and develop education program and prepare the publicity material.

• Journal of the Korean Data and Information Science Society
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• v.17 no.4
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• pp.1219-1235
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• 2006

This study aimed to inquire the relationship among wellness, quality of life and socio-demographic variables in Korean middle school students. 'Korean Wellness Scale for Middle school students(K-WSM), Quality of Life Scale, and other socio-demographic data were surveyed to 1,200 students in national wide area. For the results, ANOVA, Pearson's Correlation, and Multiple regression were conducted. With demographic variables, sex, religion, & academic achievement of students, social economic status(SES) and living with both of parents were positively related to wellness and quality of life. But grade and physical disease of student didn't show significant relationships. The relationship between wellness and quality of life showed high correlation (r=.66, p < .05). Among the wellness subscales, spiritual and social wellness showed significant predictive power. In the end, the contributions and limitations of this study were discussed.

• Proceedings of the Korean Vacuum Society Conference
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• 2009.02a
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• pp.271.2-271.2
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• 2009

• Biomolecules & Therapeutics
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• v.14 no.1
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• pp.56-65
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• 2006

Adverse drug events (ADEs) are the most common type of adverse events in medical practice. Hospital admissions related to ADEs cost high and should be monitored to prevent them. While concerns about the ADEs are increasing, the frequency and characteristics of admissions related to ADEs have not been reported in Korea. The objective of the study was to assess the rate of hospital admission related to ADEs and their characteristics through ADE signal-based retrospective reviews of medical records. As results, a total of 1,420 patients had ADE signals suggesting potential ADEs from 3,494 patients who discharged from an academic medical center over one month period. Six pharmacists independently assessed the presence of ADEs after the review of patients' medical records. Among the 3,494 discharges, 62 admissions (1.8%) were found to be realted to ADEs. Of admissions with ADEs, 83.9% were moderate (category F by the NCC MERP classification), 37.2% were preventable, and 85.5% were type A reaction. The most frequent suspected drugs causing ADEs were antineoplastics (48.9%), and the most frequent ADE signal detecting hospital admissions related to ADEs was white blood cell count (24.2%). Hospital admissions related to ADEs were found through screening the ADE signals. The ADE signal-based retrospective review could be a practical approach for identifying hospital admissions related to ADEs.

• The Korean Journal of Food And Nutrition
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• v.27 no.6
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• pp.1182-1192
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• 2014

The object of this study was to employ effective marketing methods using SNS by determining how food-related SNS usage characteristics have influence on dine-out motivation and restaurant satisfaction and how this affects people's quality of lie. Survey respondents were men and women who have had used some kinds of food-related SNS. The survey included general characteristics of respondents, food-related SNS usage characteristics, dine-out motivation, restaurant satisfaction, and food-related quality of life. Food-related SNS usage characteristics were divided into convenience, effective time-spending, and informative; Dine-out motivation was sorted into entertainment motivation and social motivation by factor analysis. Analysis of the connections between the variables by AMOS showed that among food-related SNS usage characteristics, convenience did not have a significant influence on either entertainment or social motivation. Informative had a positive effect on entertainment motivation (p<0.05), but not on social motivation. On the other hand, effective time-spending through food-related SNS had an impact on both entertainment (p<0.001) and social (p<0.05) motivation. Moreover, the effect of dine-out motivation on restaurant satisfaction showed that entertainment motivation (p<0.05) and social motivation (p<0.01) both have significant influences on restaurant satisfaction. Also, restaurant satisfaction turned out to affect quality of life (p<0.05). As a result of this study, the usage of food-related SNS did not directly influence customers' restaurant satisfaction and quality of life; (p<0.05). As a result of this study, the usage of food-related SNS did not directly influence customers' restaurant satisfaction and quality of life; however, it had an impact on dine-out motivation and gain pleasure of dining out and help improve the quality of life in the long run; thus, it is believed that marketing strategies thorough SNS by restaurant industry are required.

• Journal of Digital Convergence
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• v.17 no.12
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• pp.353-365
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• 2019

This study examined satisfaction with clinical training according to school system and school-related characteristics and analyzed the effect of satisfaction by clinical training task on the overall satisfaction with clinical training. Participants were convenience sampled from students of K University in Gangwon-do (n=279) and K University in Gyeonggi-do (n=154) who have undergone clinical training. The overall satisfaction with clinical training in dental hygiene students differed according to the school system, school-related characteristics, satisfaction by clinical training topic, and satisfaction by clinical training task. Satisfaction by clinical training task had an effect on overall satisfaction with clinical training. Thus, substantial effort, such as ensuring appropriate contents and methods of training.

• The Journal of Korean Society for School & Community Health Education
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• v.20 no.3
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• pp.1-13
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• 2019

Objectives: The purpose of this study was to examine whether demographic and socio-economic characteristics, health behaviors and health status are related to academic achievement in Korean adolescents. Methods: Data from the 14th Korea Youth Risk Behaviors web-based Survey(KYRBWS) administered in 2018 were analyzed; 60,040 students in middle and high school participated in the survey. It was conducted frequency analysis, Rao-Scott chi-square test and multiple logistic regression analysis after adjusted for variables such as age, school grade. Results: The significant influencing factors on academic achievement were family economic status, living with parents, subjective health status, smoking experience, alcohol use experience, eating breakfast, sleeping, internet use during weekdays, depressive symptom(p<.001). The odds ratio for achieving higher academic achievement compared with those who never smoked was 1.50(p<.001). Conclusion: I found that students' undesirable health behaviors affect their academic performance. To improve academic achievement, I recommend intervention programmes such as school health promotion that reduce undesirable health related behaviors.

• Journal of the Korean Society of Clothing and Textiles
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• v.23 no.7
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• pp.941-952
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• 1999

The purposes of this study were to provide the fundamental data on elementary school girls' somatotype for their clothing construction by contemplating the stage of physical growth dividing into the period of school age and characterizing the variation of body type according to the school age. The results are as follows : 1. Form the results of one-way variables analysis and multiple comparson test(Duncan's test) classification of the period school age can be divided into 'early grade(1 2 grade)' ' middle grade(3 4 grade)' and 'later grade(5 6 grade)' 2. As the results of analyzing Mean Coefficient of Variation and Standard Deviation graph for direct and indirect measurments and index especially of the Coefficient Variation that explain individual difference of growth the items of height indicates individual difference related with height of lower body of early grade group the items of length individual difference related with length of upper body of later grade group and the items of circumference make little difference. The items of anagle makes pretty higher value that direct measurements and especially in lower angle of chest make a distinctive difference, This fact proves that children's somatotype change from the belly part extruded forwards of early and middle grade to the upper body part slanted slightly forward of later grade.