• Journal of Korean Society for Quality Management
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• v.24 no.3
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• pp.94-110
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• 1996

Two regression models for explaining the tire performances (especially conering coefficients) by tire design and experimental factors are built. One is the ordinary regression model, and the explaining variables in the model are selected by a stepwise method. The other model is built by a modern nonparametric regression technique, called projection pursuit regression. Then two models are compared and combined, so that the relationship between the tire performances and design factors are well figured out. The optimal experimental design issue and future research ideas are also discussed.

• Nuclear Engineering and Technology
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• v.53 no.12
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• pp.4189-4200
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• 2021

In this study, the relationship between the environmental radiation dose rate and meteorological variables was investigated with multiple regression analysis and big data of those variables. The environmental radiation dose rate and 36 different meteorological variables were measured on Ulleung Island, Republic of Korea, from 2011 to 2015. Not all meteorological variables were used in the regression analysis because the different meteorological variables significantly affect the environmental radiation dose rate during different periods, and the degree of influence changes with time. By applying the Pearson correlation analysis and stepwise selection methods to the big dataset, the major meteorological variables influencing the environmental radiation dose rate were identified, which were then used as the independent variables for the regression model. Subsequently, multiple regression models for the monthly datasets and dataset of the entire period were developed.

• Proceedings of the Korean Society of Crop Science Conference
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• 2005.04a
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• pp.172-173
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• 2005

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.7
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• pp.173-181
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• 2019

The purpose of this study was to identify the effects of gender role conflicts, professional nursing value on career preparation behaviors of male nursing university student. Data were collected from 127 male nursing university student in grade 2-4 by using structured questionnaires from July 1 to November 30, 2018. The collected data were analyzed by descriptive statistics, independent t-test, ANOVA, Pearson's correlation coefficients and stepwise multiple regression by using SPSS Win 24.0 program. Multiple regression analysis showed that the predictors of career preparation behaviors were professional nursing values(${\beta}=0.28$, p=.001), satisfaction with major (${\beta}=0.23$, p=.006), club(${\beta}=.19$, p=.020) and the regression equation explained 20.8% of career preparation behaviors. Based on the results of this study, it is necessary to provide career educational programs considering according to the academic year of male nursing students and to develop educational programs to improve the nursing professionalism of male nursing students.

• The Journal of Korean Academic Society of Nursing Education
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• v.11 no.2
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• pp.135-141
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• 2005

Purpose: This study was to investigate the factors influencing performance of preceptors and preceptees. Method: The selectees were composed of 27 preceptors and 27 preceptees. The preceptors were given twenty six hours of education and training concerned with theory and practice and then the preceptors mentioned above gave the preceptees vis-a-vis education and training for four weeks. The data were collected through a questionnaire survey of general characteristics, performance, autonomy, empowerment, organizational commitment. The data were analyzed using t-test, ANOVA, Pearson's correlation coefficient, and the Stepwise multiple Regression. Results: The differences of performance, autonomy, organizational commitment and empowerment were found to have a significance between preceptors and preceptees in preceptorship. The performance was significantly correlated between autonomy, organizational commitment and empowerment of the preceptors and preceptees. Stepwise multiple Regression analysis for performance revealed that the most powerful predictor was empowerment. These variables accounted for 37.7%(preceptors) and 54.6%(preceptees) of variance of the performance. Conclusion: The findings above indicated that the preceptorship was significant as nursing management intervention to increase nurses' performance. Therefore it may be necessary further to develop and apply, such as performance, autonomy, empowerment, organizational commitment in preceptorship.

• Korean Journal of Adult Nursing
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• v.26 no.4
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• pp.444-454
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• 2014

Purpose: The purpose of the study was to examine the relationships among pain belief, perceived social support, coping strategies, and quality of life of people with noncongenital spinal cord injury and to identify factors influencing quality of life. Methods: A correlational predictive design was used. The data were collected from 197 people with noncongenital spinal cord injury with questionnaires in 2012 in Korea. The data were analyzed using descriptive statistics, t-tests, one-way ANOVA, Pearson's correlation coefficients, and stepwise multiple regression using SPSS/WIN 18.0. Results: Pain belief, perceived social support, and coping strategies were correlated significantly with the quality of life. As a result of stepwise multiple regression analysis, pain belief, perceived social support, coping strategies, damaged area, and time since injury were discovered to account for 59.1% variance of the quality of life. The variable that most affected the quality of life was pain belief followed by perceived social support and coping strategies. Conclusion: The results of the study clearly demonstrate the importance of pain control, social support, and coping skills in order to improve quality of life among people with noncongenital spinal cord injury.

• Journal of Korean Academy of Fundamentals of Nursing
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• v.16 no.4
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• pp.506-514
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• 2009

Purpose: This study was conducted to define factors influencing psychosocial adaptation of patients with a permanent colostomy. Independent variables including perceived stress, stoma care self-efficacy, self-care behavior, self-esteem and family support were used to predict psychosocial adaptation. Method: The data was analyzed using the SPSS pc program window version 12.0 for descriptive statistics, Pearson correlation coefficients and stepwise multiple regression. Ninety patients with a permanent colostomy were recruited between September 2007 and May 2008. The reliability of the instruments was tested with Cronbach's alpha which ranged from .78 to .92. Result: The results were as follows: The mean psychosocial adaptation score was 3.05. There were significant correlations between all the predictive variables and psychosocial adaptation (r= .63~ -.43, p<.001). Stepwise multiple regression analysis showed that self-esteem (40%), stoma care self-efficacy (7%), perceived stress (2%), and self-care behavior (2%) accounted for 51% of the variance in psychosocial adaptation. Conclusion: These findings indicate that to improve psychosocial adaptation of patients with permanent colostomy, the major related factors identified in this study should be considered.

• Journal of Korean Academy of Nursing
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• v.34 no.7
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• pp.1288-1297
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• 2004

Purpose: The purpose of this study was to investigate the factors influencing health promoting lifestyle in the elderly. Method: The subject of this study was 305 elderly person over the age of 60, living in rural and urban, Korea. For the analysis of collected data, descriptive statistics, t-test, analysis of variance and stepwise multiple regression were used for statistical analysis with SPSS statistical program. Results: The average item score for the health promoting lifestyle was 2.46, The higher score on the subscale was nutrition(2.65). The lowest score on the subscale were physical activity(2,36) and stress management(2,36). General characteristics showing statistically significant difference in health promoting lifestyle were age, residential district, live together spouse, education, religion and pocket money in the elderly. Stepwise multiple regression analysis revealed that the most powerful predictor of health promoting lifestyle in the elderly was prior related behavior(R2=.554). A combination of prior related behavior, perceived benefits of action, perceived self-efficacy, commitment to a plan of action, and interpersonal influences accounted for $64.3\%$ of the variance in health promoting lifestyle in the elderly, Conclusion: The factors influencing on health promoting lifestyle for elderly were prior related behavior, perceived benefits of action, perceived self-efficacy, commitment to a plan of action, and interpersonal influences.

• Journal of Korean Academy of Nursing
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• v.32 no.6
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• pp.812-822
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• 2002

The Purpose of this study was to identify the relationship among leadership style of nurse managers, job satisfaction, organizational commitment, and turnover intention. Method: The subjects were 468 nurses and 19 head nurses who were working at the 3 general hospitals in seoul. The data were collected from July 6 to September 14, 2001 by the structured questionnaires. For data analysis, descriptive statistics, ANOVA, Pearson correlation coefficient, and stepwise multiple regression with SAS package were used. Result: 1) The score of the nurse managers' transformational leadership perceived by surbodinates' were higher than that of the nurse managers' transactional leadership. Among 5 subdimensions of the leadership styles perceived by surbodinates', the scores of 'charisma' and 'intellectual stimulation' were highest and 'management by exception' were lowest. 2) 'Charisma', 'intellectual stimulation', 'individual consideration' and 'contingent reward' were positively related to all of variables except 'turnover intention'. 'Management by exception' was negatively related to all of variables and was positively related to 'turnover intention'. 3) 'Job satisfaction' was positively related to 'organizational commitment' and 'Job satisfaction', 'organizational commitment' were negatively related to 'turnover intention'. 4) As a result of stepwise multiple regression analysis, the key determinants of 'turnover intention' were 'organizational commitment' and this explained 44.4% of the total variance of it.

• Korean Journal of Adult Nursing
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• v.18 no.1
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• pp.71-80
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• 2006

Purpose: This study was to investigate the factors influencing the quality of life of patients with hemophilia and to provide the data for health promoting intervention in order to improve their quality of life. Method: The subjects of this study were involved 186 male patients with hemophilia by convenience sampling. These results were analyzed statistically by frequency, percentage, t-test, ANOVA, Pearson Correlation Coefficient, and Stepwise multiple regression. Results: There were significant differences in the quality of life according to the frequency of bleeding. Quality of life showed negative relationships and health problems, bleeding, limitation of joint motion, and depression with stepwise Multiple Regression analysis for quality of life revealed that the most powerful predictor was depression. Depression, health problem, and limitation of joint motion accounted for 64.6% of the variance in the quality of life of patients with hemophilia. Conclusion: Therefore it is necessary to develop nursing interventions with these variables to increase the quality of life for patients with hemophilia.