• Structural Engineering and Mechanics
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• v.62 no.4
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• pp.417-430
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• 2017

Ultra high performance concrete (UHPC) has aroused interest around the world owing to superior mechanical and durability properties over conventional concrete. However, the application of UHPC in practice poses difficulties due to its inherent brittleness. UHPC filled in steel tube columns (UHPC-FSTCs) are capable of restricting the brittle failure of non-reinforced UHPC columns and forming a high performance member with enhancement of strength and ductility. Currently, research on UHPC-FSTCs remains very limited and there is relatively little information about the mechanical behavior of these columns. Therefore, this study presents a review of past experimental studies to have a deeper insight into the compressive behavior of UHPC-FSTCs under axial loading on entire section and on concrete core. Based on the test results obtained from Schneider (2006) and Xiong (2012), an analysis was conducted to investigate the influence of the confinement index (${\xi}$) and diameter to steel tube thickness ratio (D/t) on the strength and the ductility in short circular UHPC-FSTCs. Furthermore, the appropriateness of current design codes including EC4, AISC, AIJ and previous analytical models for estimating the ultimate loads of composite columns was also examined by the comparison between the predictions and the test results. Finally, simplified formulae for predicting the ultimate loads in two types of loading pattern were proposed and verified.

• International Journal of Advanced Culture Technology
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• v.8 no.2
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• pp.48-57
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• 2020

This study aims to examine the impact of Korean paternalistic leadership under a hierarchical structure on employee voice and also to compare the differences in leaders' behaviors-authoritarian, benevolent, and moral, and the effects on employee voice between governmental organizations and Quasi-government organizations. The sample of governmental organizations includes 195 employees under job control from at least middle-range or higher managers at local governments and local police agencies in Daegu and Busan metropolitan. The other sample also includes 189 employees reporting directly to managers with job control in public enterprises and government-funded Korean institutes in the same cities. This study employs t-test and regression analysis to test presumed hypotheses. As the results of the analysis, there is a significant difference in authoritarian leadership between governmental organizations and Quasi-government organizations, but both benevolent and moral leadership are not. Benevolent and moral leadership are positively related to employee voice, but authoritarian leadership is not. Based on the analytical results, this research suggests the theoretical implications and the limitations on the applicability of paternalistic leadership into the Korean cultural context for an expanded understanding of leadership theory and practical implications for managers in terms of improvement of employee voice.

• Journal of muscle and joint health
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• v.17 no.2
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• pp.113-123
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• 2010

Purpose: The purpose of this study was to identify the effects of a smoking cessation program on processes of change, situational temptation, and decisional balance in male university student smokers. Method: Utilizing a quasi-experimental design, 78 male university students consisted of an experimental group (n=48) and a control group (n=30). A smoking cessation program was applied to the experimental group for a period of 6 months while no program was given to the control group. Study questionnaires were used to measure outcome variables before and after the program. Descriptive analysis, $\chi^2$-test, t-test, and ANCOVA were used with SPSS 18.0 program for data analysis. Results: After treatment with this program, the experimental group showed significantly higher scores for processes of change (experiential and behavioral processes of change) than the control group. The experimental group also showed significantly lower scores for situational temptation (positive social, negative affect, and habit strength). Conclusion: The smoking cessation program may have positive effects on process of change and smoking temptation for male university student smokers.

• Journal of Fashion Business
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• v.16 no.6
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• pp.144-159
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• 2012

This study was to examine the effect of standards of selecting jeans and appearance management behavior on leisure lifestyle. Questionnaires were administered to 253 college students living in Deagu and Kyoungbuk. Data were analyzed by using frequency, factor analysis, regression analysis, t-test, and ${\chi}^2$-test. The findings are as follows. Factor structure of each concept appeared to be brand-valued, functionality valued and design-valued for standards of selecting jeans, diet management, exercise management, weight management and appearance satisfaction. Leisure lifestyle consisted of sports activity-type, sociality-type and self-management-type while value lifestyle consisted of active sociality-oriented, family-oriented and economic feasibility-oriented. There was a significant difference in brand-valued and design-valued of standards of selecting jeans and in frequency of wearing jeans male students showed higher than female students. The result of this study showed brand-valued, diet management, exercise management, weight management, and appearance satisfaction had significant effect on sports activity-type and design-valued and weight management had significant effect on sociality-type. Brand-valued affected self-management-type significantly and brand-valued, design-valued, diet management and appearance satisfaction had a significant effect on active sociality-oriented and brand-valued and diet management affected family-oriented.

• Perspectives in Nursing Science
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• v.8 no.2
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• pp.105-112
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• 2011

Purpose: The purpose of this study was to identify the predictors of job stress in hospital nurses. The predictors of job stress were the subject's general characteristics, communication style, critical thinking disposition and job satisfaction. Methods: 294 nurses who had worked in a hospital participated in this study. The data were analysed with descriptive analysis methods including a t-test, ANOVA, Scheffe test, Pearson correlation coefficient and multiple regression analysis. Results: The job stress score for nurses was 111.6. There was a statistically significant difference between job stress and marriage status (p<.001), education (p<.001), clinical career (p<.001), position (p<.001), communication style (p<.001), critical thinking disposition (p<.001), and job satisfaction (p<.001). Critical thinking disposition, job satisfaction and clinical career together accounted for 36.88% of the total variation in job stress. Conclusion: Based on the findings of this study, the development of a nursing intervention program that can lead to an improvement in critical thinking disposition is suggested.

• Research in Community and Public Health Nursing
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• v.23 no.3
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• pp.296-306
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• 2012

Purpose: This study was conducted to measure the relationships between ecological factors and Navy personnel's physical activity (PA) based on McLeroy's Ecological model. Methods: A cross-sectional survey was conducted with a convenience sample of 184 Navy personnel working in 10 Navyships. A self-reporting questionnaire consisted of measures of intrapersonal, interpersonal, organizational and community factors related to Navy personnel` s PA. Data were analyzed by descriptive statistics, $x^2$-test, t-test, analysis of variance, and hierarchical multiple regression using SPSS/WIN 17.0 programs. Results: Their mean PA level was $2,848.1{\pm}3,344.5$ MET-min/week, and mostly moderate level (50.5%). Hierarchical multiple regression analysis showed that religion, working department, working type, perceived health status and community environment were significant PA correlates. Conclusion: Community environmental factors as well as intrapersonal factors were significantly associated with Navy personnel's PA, indicating that community health nurses should expand an approach for individual-level behavioral change to incorporate Navy personnel specific community environmental barriers into PA interventions.

• Research in Community and Public Health Nursing
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• v.20 no.3
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• pp.296-306
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• 2009

Purpose: This study was to identify variables influencing health risk behaviors in adolescents on the basis of the PRECEDE model. Methods: Data were collected from 434 middle school students in Chungbuk Province for two weeks in July 2008. The instrument for this study was a self-reported questionnaire. The SPSS/WIN 12.0 program was used for data analysis, which included t-test, one way ANOVA, Scheffe's test, Pearson's correlation coefficients, and stepwise multiple regression analysis. Results: Adolescents' level of health risk behaviors ($47.32{\pm}7.98$) was below medium. Physical inactivity ($6.73{\pm}2.23$) and Internet addictive behavior ($6.36{\pm}2.11$) were major health risk behaviors. The perceived level of school health education ($30.74{\pm}9.84$) was low. Family function and general self efficacy explained 14.3% of variance in health risk behaviors. Family function was a major predictor of health risk behaviors ($R^2$=.108, p=.000). However, the perceived level of school health education was not a significant predictor of health risk behaviors. Conclusion: For the prevention of health risk behaviors in adolescents, it is necessary that the family and the school collaborate with each other in educational strategies in order to strengthen influential factors such as family function and general self-efficacy.

• Research in Community and Public Health Nursing
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• v.28 no.2
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• pp.216-225
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• 2017

Purpose: The purpose of the study was to analyze the effects of self-care behavior, empowerment, and social support on glycosylated hemoglobin in patients with type 2 diabetes. Methods: The data were collected during the period of July 1 to July 31, 2016. In total, 172 participants were recruited from outpatients who had been diagnosed with type 2 diabetes at a health care center, a health promotion center at National Health Insurance Corporation, and a tertiary hospital. Statistical data were analyzed with SPSS 20.0 using frequency analysis, t-test, ANOVA, $Scheff{\acute{e}}$ test, Pearson's correlation coefficients, and hierarchical regression analysis. Results: The study results showed that self-care behavior (${\beta}=-.34$, p<.001), empowerment (${\beta}=-.34$, p<.001), and social support (${\beta}=-.20$, p=.018) were found to be influential factors affecting glycosylated hemoglobin, with an overall descriptive power of 69%. Conclusion: Self-care behavior, empowerment, and social support are considered to be important factors in blood glucose management for the patients with type 2 diabetes. Therefore, self-caring blood glucose programs and internal synchronizing education through social support and empowerment need to be improved.

• Journal of Korean Foot and Ankle Society
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• v.5 no.1
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• pp.13-17
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• 2001

Objectives: This study was done to determine the prevalence of radiographic ankle osteoarthritis (OA) in Korean women with clinical primary ankle OA. Methods: This analysis involved 160 Korean women who visited our out patient clinic due to ankle joint pain. Ankle AP and lateral weight-bearing radiographs were evaluated retrospectively to check whether they have radiographic OA or not. Radiographs were read for features of ankle OA using School classification. Demographic factors and radiographic findings in both radiographic ankle OA group and non-radiographic ankle OA group were analyzed by the student t-test, the chi square test and the Pearson's analysis. A p value <0.05 was considered significant. Results: The prevalence of radiographic ankle OA in Korean women is 18.2 % in patient between 18 and 39 years and is 55.6 % in patient over 40. There was significant difference between two groups with age (P<0.001) and relatively strong correlation between radiographic OA and age (r=0.474, P<0.001). Conclusion: These results show that the prevalence of Korean women with radiographic changes of ankle OA was 45 % and there was relatively strong correlation between age and radiographic ankle OA.

• Human Ecology Research
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• v.53 no.3
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• pp.293-307
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• 2015

Social commerce has a large impact on the emergence of the concept of society and individual lives that is recognized as one of the most important business areas in the Internet environment. A marketing agency, Trend Monitor (http://www.trendmonitor.co.kr), conducted a survey on social commerce usage and satisfaction level; subsequently, we used survey result data from 221 adult males and females for our research sample. Data analyses were conducted by reliability test, confirmatory factor analysis, t -test or one-way analysis of variance, and structural equation model (SEM) with IMB SPSS ver. 21.0 and ver. AMOS ver. 21.0. This study focused on multi-dimensional consumer innovativeness and found three elements of acceptability, competence, and distribution. Empirical verification through SEM presented data that suggests the three consumer innovativeness factors have a direct positive effect on social commerce that causes factors to indirectly affect satisfaction levels. This study indicated that the main consumption patterns in modern society take advantage of social commerce and satisfaction by improving a market economy to promote restoration. First, this study considers consumer innovativeness to have three factors. Secondly, research results help to understand relations between consumer innovativeness, use and satisfaction with social commerce that can help the social commerce industry establish effective market strategies through consumer innovativeness. The conclusion discusses implications for academic research and marketing strategies.