• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.15 no.1
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• pp.1-15
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• 2016

This study aims to develop a model by which city bus drivers who are likely to cause an accident can be figured out based on the information about their actual driving records. For this purpose, from the information about the actual driving records of the drivers who have caused an accident and those who have not caused any, significance variables related to traffic accidents are drawn, and the accuracy between models is compared for the classification models developed, applying a discriminant analysis and logistic regression analysis. In addition, the developed models are applied to the data on other drivers' driving records to verify the accuracy of the models. As a result of developing a model for the classification of drivers who are likely to cause an accident, when deceleration ($X_{deceleration}$) and acceleration to the right ($Y_{right}$) are simultaneously in action, this variable was drawn as the optimal factor variable of the classification of drivers who had caused an accident, and the prediction model by discriminant analysis classified drivers who had caused an accident at a rate up to 62.8%, and the prediction model by logistic regression analysis could classify those who had caused an accident at a rate up to 76.7%. In addition, as a result of the verification of model predictive power of the models showed an accuracy rate of 84.1%.

• Korean Journal of Childcare and Education
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• v.10 no.4
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• pp.159-176
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• 2014

This study aims to examine the suggestions by studies that family predictors are related to developmental outcomes more strongly for children reared principally by their parents compared to those with extensive child care experience. Zero-order correlations between family predictors and developmental outcomes were conducted and the significance of differences in correlation coefficients between the two child care groups were examined. There was no evidence that there exist systematic differences between the two groups in predictive power of family factors except a few exceptions. At 2 years, social parenting style was more strongly associated with communication ability in the extensive child care group. At 3 years, some HOME subscales were related to a child's expressive and receptive vocabulary skills in significantly greater magnitudes in the mother care group. The findings also implied the potential contribution of child care environment on developmental outcomes for those who spend extensive hours in nonmaternal care.

• Journal of Gifted/Talented Education
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• v.21 no.4
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• pp.961-977
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• 2011

The purpose of this study was to investigate the relationship between learning motivation and task commitment and find sub factors of learning motivation that affect task commitment. For this study 30 science gifted student (4th and 5th grade in elementary school) participated. The survey instruments used for this study were Academic Motivation Scale and Task Commitment Scale. The statistical methods employed for data analysis were the correlation analysis and multiple regression analysis. The result of this study were as follows: First, the learning motivation and task commitment of science gifted students showed similar levels. But there was differences of strength each sub factors of learning motivation and task commitment. Second, there was a significant positive correlation between learning motivation and task commitment. Also, learning motivation has the explanatory power of predictive variable for the task commitment approximately 49.3%. Expecially learning motivation has significant positive correlation with responsibility and self-control that sub factors of task commitment. Among the sub factor of learning motivation, confidence has most correlations with sub factors of task commitment and significant impact on task commitment. This result indicate that we need to develop learning motivation to improve task commitment and especially develop learning motivation program to grow up confidence of science-gifted.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.5
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• pp.2304-2314
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• 2013

The purpose of this study is to explore the relationships between the empowerment, nursing performance, job satisfaction and turnover intention of long-term care hospital nurses. The subjects were 258 nurses at a long-term care hospital in B and U city. The data were collected from November 23, 2012 to January 21, 2013. Data were analyzed by SPSS win 20.0 program. The mean score of empowerment was 3.22, nursing performance was 3.78, job satisfaction was 3.25 and turnover intention was 2.87. Empowerment was correlated with nursing performance and job satisfaction positively, but correlated with turnover intention negatively. As a result of multiple regression, empowerment has 50.3% of the explanatory power on job satisfaction, 13.4% on nursing performance, and 21.9% on turnover intention. The significant predictive factors of nursing performance and job satisfaction were information and support in empowerment. In addition, turnover intention was resources in empowerment. These results suggest that empowerment improvement programs should be focused on developments to improve the quality of nursing.

• Korean Journal of Psychosomatic Medicine
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• v.17 no.2
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• pp.75-81
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• 2009

Objectives : This study aimed to evaluate the clinical usefulness of Korean version of Strengths and Difficulties Questionnaire(SDQ-Kr) by comparing with Korean version of Childhood Behavior Checklist (K-CBCL). Methods : The parent version of SDQ-Kr and K-CBCL were administered to parents of 313 children in psychiatric clinic, 91 children referred for psychiatric consultation from pediatric clinic and 93 control children in pediatric clinic. All children aged 4-11 years old. Children in psychiatric clinic were diagnosed with one of followings;ADHD, emotional disorders and oppositional/conduct disorder. Mean scores were compared among three groups by gender. Coefficients were calculated for corresponding problem scales and total scores of both questionnaires. ROC analysis was performed for discriminant validity to distinguish psychiatry and pediatrics samples, and also to distinguish diagnostic groups of psychiatry sample. Results : The psychiatry sample showed highest means of problem scales and total scores, followed by consultation and control sample of pediatrics. SDQ-Kr and K-CBCL were significantly correlated, and equally able to distinguish those samples with SDQ-Kr showing better results. Within the psychiatry sample, SDQ-Kr had higher predictive power for all diagnostic groups. Conclusion : This study supports clinical usefulness of SDQ-Kr. We suggest that SDQ-Kr could be used not only as a diagnostic tool for children in psychiatric clinic but also as an effective and efficient screening instrument for children in need for psychiatric evaluation in pediatric clinic.

• Korean Journal of Clinical Laboratory Science
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• v.50 no.3
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• pp.245-252
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• 2018

We evaluated the possible clinical application of Non HDL-cholesterol and triglyceride to HDL-cholesterol ratio as a metabolic syndrome predictor for the elderly in Korea. 1,543 elderly persons aged 65 years or older who visited the health examination center of Gyeonggi Regional General Hospital from January 2015 to December 2017 and had a health checkup were enrolled in this study. Metabolic syndrome was diagnosed based on the American Heart Association/National Heart, Lung, and Blood Institute (AHA/NHLBI) standards. Abdominal obesity was assessed by the Asia-Pacific standards presented at the World Health Organization (WHO) West Pacific Region. Non-HDL-cholesterol was calculated as the difference between total cholesterol and HDL-cholesterol. The metabolic syndrome predictive power was higher for triglyceride to HDL-cholesterol ratio than for Non HDL-cholesterol. After correcting for related factors, triglyceride to HDL-cholesterol ratio was higher in the $4^{th}$ quartile, which had a higher risk of developing metabolic syndrome, than in the $1^{st}$ quartile. The optimal cutoff value for the triglyceride to HDL-cholesterol ratio that predicts the onset of metabolic syndrome was 2.8. triglyceride to HDL-cholesterol ratio can be a simple and practical indicator of the risk of metabolic syndrome.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.10 no.5
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• pp.1100-1108
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• 2009

The Objectives: The purpose of this study is to identify the factors related to management of DM in Korea. Methods: The subjects selected by using data of National Health and Nutrition Survey(NHANS) in 2005 were 415 adults, aged 20 and older, and diagnosed with DM. This study used data mining algorithms. This study validated the predictive power of data mining algorithms by comparing the performance of logistic regression, decision tree, and Neural Network on the basic of validation, it was found that the model performance of decision tree was the best among the above three techniques. Result: First, awareness of DM was positively associated with age, residential area, and job. The most important factor of DM awareness is age. Awareness rate of DM with 52 age over is 76.1%. Among the ${\geq}52$ age group, an important factor is family history. Among patients who are 52 years or over with family history of DM, an important factor is job. The awareness rate of patients who are 52 age over, family, history of DM, and professionals is 95.0%. Second, treatment of DM was also positively associated with awareness, region, and job. The most important factor of DM treatment is DM awareness. Treatment rate of patients who are aware of DM is 84.8%. Among patients who have awareness of DM, an important factor is region. The awareness rate of patients who are aware of DM in rural area is 10.4%. Conclusion: Finally, the result of analysis suggest that DM management programs should consider group characteristic of DM patients.

• Journal of Korean Home Economics Education Association
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• v.22 no.2
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• pp.45-60
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• 2010

The purpose of this study was to analyze the effect of knowledge and perception of environmental problems on pro-environmental behavior of youth. The data used for this study were collected using questionnaire. The sample for this study consisted of 654 junior and high school students living in Seoul and Gyeong-gi Province. Descriptive statistics and multiple regression analysis were used to analyze the data. The following is a summary of the major findings. (1) The significant variables affecting pro-environmental behavior of youth were need of environmental education, source of environmental knowledge, level of perception on air pollution and scarcity of resources and energy, sex and total amount of allowance of students. These variables explained 20.5% of variance of pro-environmental behavior. (2) Environmental education related variables were the best predictor of pro-environmental behavior; knowledge of environmental problem variables had limited predictive power. (3) Recommendations for teaching-learning strategies have been suggested to enhance youth's pro-environmental behavior in school.

• Korean Educational Research Journal
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• v.40 no.1
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• pp.1-16
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• 2019

The purpose of this study is to explore the relationship between parental attitudes, teachers' autonomy support as perceived by high school students, and the self-directed learning abilities of high school students. A total of 341 high school students from South Korea participated in the study. A survey instrument was used to measure parental attitudes, teacher autonomy support, and students' self-directed learning ability. The results of the study are as follows. First, the rearing attitudes of parents were perceived by the participants as oriented more toward being attainable and relatively less self-directed. There were no significant differences between male and female students, though male students were more likely to perceive their parents' attitudes as more attainable-oriented. The results also show that, in terms of self-directed learning skills among high school students, the more goal-oriented, compassionate, and autonomous the parental attitudes are, the likelier are students to have developed self-directed learning skills. Second, the male students were more aware of the autonomy support of teachers than were the female students. This shows that the results have significant predictive power over the self-directed learning ability among high school students. Accordingly, the perception of autonomy support by teachers affects the development of self-directed learning among students. We can therefore conclude that self-directed learning skills develop most effectively in students who are supported by their teachers.

• Korean Journal of Social Welfare
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• v.37
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• pp.449-473
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• 1999

The purpose of this study is to investigate the relationship between suicidal ideation and psycho-social factors such as depression, stress, self-esteem, and support from family, friends, and teachers. Data from a sample of 224 male and female high school sophomore students. The results were analyzed by t-test, one-way ANOVA, person's correlation, and multiple regression. The findings of this research are as follows. Firstly, there was no statistically significant gender difference in suicidal ideation. However females reported greater suicidal ideation than males. Secondly, there were a statistically significant gender differences in depression. stress, self-esteem, and support from teachers. Thirdly, the variables in the cause model accounted for 42.3% for males, and 36.4% for females, of the variance in suicidal ideation. Fourthly, there were gender differences in the predictive power of variables within the cause model for suicidal ideation. Depression, self-esteem. and stress were found to be significant predictors of suicidal ideation in males. On the other hand, depression and lack of family support were shown as significant predictors of suicidal ideation in females. These findings suggest that the following approaches should be taken in order to decrease suicidal ideation among adolescents. With males self-esteem should be strengthened, depression should be reduced, and stress should be managed. With females family problems need attention, and depression need to be reduced.