• Korean Journal of Culture and Social Issue
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• v.13 no.3
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• pp.111-125
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• 2007

This study focused on novice drivers. Novice drivers get involved in more traffic accidents than the other drivers because of less driving experience. The aim of this study is to investigate the relationship between driving confidence levels and speeding, drunken driving, and traffic accidents. 192 drivers responded driving confidence levels questionnaire and driving experience items. 'Circumstance Insensibility', 'Unsafe Driving', 'Incautious Driving', and 'Self-efficacy of Driving' had significant relations with speeding in novice divers group. Especially, 'Circumstance Insensibility' showed a significant relation with speeding, drunken driving and traffic accidents. In the result of path analysis, driving confidence levels explained 22% of the speeding, 12% of the drunken driving and 21% of the traffic accidents in novice drivers group. 'Circumstance Insensibility' was most effective for traffic accidents of novice drivers. We verified that 'Self-efficacy of Driving' affects on traffic accidents via speeding.

• Journal of Digital Convergence
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• v.14 no.4
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• pp.459-469
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• 2016

The purpose of this study is to classify the subtypes of perpetrators of school violence based on their psychological characteristics. In order to classify the students, questionnaires/interviews which consist of 6 factors (Cognitive Impulsivity, Unplanned Impulsivity, Depression, Anxiety, Peer Conformity, and Self assertion) and 19 questions were administered to 86 perpetrators of school violence. Then, a two-step cluster analysis was performed with the survey results of 74 perpetrators. As a result, three clusters were identified and named as follows: 1) Impulsive Vulnerability, 2) Emotional Vulnerability, and 3) Social Vulnerability. Scrutinizing the detailed characteristics of each cluster, the first cluster, Impulsive Vulnerability, showed higher scores on Cognitive Impulsivity and Unplanned Impulsivity, compared to the other two clusters, while Depression and Anxiety scores were lower. The second cluster, Emotional Vulnerability, showed higher scores on Depression and Anxiety, while Cognitive Impulsivity and Unplanned Impulsivity scores were lower. The third cluster, Social Vulnerability, showed the highest score on Peer Conformity among the three clusters. However, Self assertion scores were the lowest in this cluster, and Cognitive Impulsivity, Unplanned Impulsivity, depression, and anxiety scores were lower than in the others. This study will provide a useful insight for facilitating teachers and parents' understanding of the psychological characteristics of school violence perpetrators and thereby contributing to effective intervention.

• Research in Plant Disease
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• v.19 no.1
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• pp.31-35
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• 2013

Thirteen soybean cyst nematode (SCN) (Heterodera glycines) populations collected in Korea were examined in their HG type by their reproductivity on 7 Plant Introduction indicators for the identification of HG type. Six HG types were identified, HG type 0, 2, 5, 2.5, 1.2.7, and 2.5.7. HG type 2.5 was the most frequent (4 samples, 30.8%), followed by HG type 2.5.7 (3 samples, 23.0%). About 76.9% of SCN populations were reproduced on PI 88788, followed by PI 209332 (61.5%), PI 548316 ('Cloud') (30.8%), and PI 548402 ('Peking') (7.7%). No population could reproduce on PI 90763, PI 437654, thus, they could be used for resistant source for developing SCN resistant soybean in Korea.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.4 no.4
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• pp.391-397
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• 2003

This paper is about the digital image decimation algorithm which generates a value of decimated element by an average of a target pixel value and a value of neighbor intelligible element to adaptively reflect the merits of ZOD method and FOD method on the decimated image. First, a target pixel located at the center of sliding window is selected, then the gradient amplitudes of its right neighbor pixel and its lower neighbor pixel are calculated using first order derivative operator respectively. Secondly, each gradient amplitude is divided by the summation result of two gradient amplitudes to generate each intelligible weight. Next, a value of neighbor intelligible element is obtained by adding a value of the right neighbor pixel times its intelligible weight to a value of the lower neighbor pixel times its intelligible weight. The decimated image can be acquired by applying the process repetitively to all pixels in input image which generates the value of decimated element by calculating the average of the target pixel value and the value of neighbor intelligible element.

• Communications of Mathematical Education
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• v.31 no.3
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• pp.279-290
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• 2017

This study proposes a self learning material for understanding the key contents of Galois theory. This material is for teachers who have learned algebraic structures like group, field, and vector space which are related with Galois theory but do not clearly understand how algebraic structures are related with the solvability of polynomials and school mathematics. This material is likely to help them to overcome such difficulties. Even though proposed material is used mainly for self learning, the teachers may be helped once or twice by some professionals. In this article, two expressions 'solvability of polynomial' and 'solvability of equation' have the same meaning and 'teacher' means in-service mathematics teacher.

• Korean Journal of Culture and Social Issue
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• v.13 no.1
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• pp.1-41
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• 2007

This study examines factors that influence delinquent behavior among Korean adolescents using longitudinal analysis. A total of 1,012 students completed a questionnaire when they were Grade 6 and 739 students completed a follow-up questionnaire when they became Grade 9. Results of multiple regression analysis indicate that the following variables predicted delinquent behavior of Grade 9 students: Bullying, previous delinquency, experience of punishment, victimization, social efficacy, and moral disengagement. The above six variables have direct and mediating influence of delinquent behavior. Relational factors also influenced delinquent behavior. Social exclusion from friends reduce social efficacy, which increases victimization and which in turn increases bullying, leading to greater delinquency. Parental rejection, social exclusion from friends and hostility from teachers increase moral disengagement, which increases bullying, leading to delinquency. Low academic achievement increases the likelihood of being punished, which increases bullying, leading to delinquency. The results indicate that moral disengagement and social efficacy are mediating factors of delinquency and negative life-events (i.e., social exclusion from friends, rejection from teachers, hostility from parents and low academic achievement) increase the likelihood that Korean adolescents will engage in delinquent behavior. Implications of the results for future research are discussed.

• Journal of Digital Convergence
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• v.10 no.1
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• pp.77-86
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• 2012

The significances of this study are that it offers the possibility of empirical measure, and analysis of the relevance among the temperament according to the degree of Internet addiction, parental rearing behaviors, and committing school violence and that, based on this, were drawn policy suggestions to prevent school violence according to the degree of Internet addiction. According to the results of this study it was revealed that there are differences in Internet addiction depending on the demographical and sociological characteristics. The result of investigating the impact of Internet addiction's degree on the actions of committing school violence shows that the level of general activities is high in the group of young people of Internet addiction and addiction risk, their low access/withdrawal temperament and mood temperament affect significantly the actions of committing school violence, and in parenting behavior mother's high expectations and low supervision affect youth Internet addiction and school violence. Thus, policy suggestions to prevent school violence according to Internet addiction were presented y dividing the role of government and schools, and homes.

• Korean Journal of School Psychology
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• v.17 no.1
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• pp.87-107
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• 2020

The purpose of this study was to examine the mediating effect of functional and dysfunctional expressions of anger on the relationship between covert narcissism and dating violence among college students. The study also investigated gender differences with regard to covert narcissism, dating violence, and functional and dysfunctional expressions of anger. To this end, 339 college students (133 males, 206 females) with heterosexual dating experiences in the Busan Metropolitan area were recruited. They responded to the Covert Narcissism Scale, the Revised Conflict Tactics Scale 2, and the Korean adaptation of the State-Trait Anger Expression Inventory. The results were as follows. First, covert narcissism, dating violence, and functional and dysfunctional expressions of anger differed significantly by gender. Second, there were statistically significant correlations between covert narcissism, dating violence, and functional and dysfunctional expressions of anger. Third, multiple regression analysis showed that dysfunctional expressions of anger for males were positively correlated with dating violence while functional expressions of anger were negatively correlated. For females, dysfunctional expressions of anger were positively correlated with dating violence while functional expressions of anger were not significantly correlated. Fourth, dysfunctional expressions of anger completely mediated the relationship between covert narcissism and dating violence for both males and females, but functional expressions of anger had no mediating effect. These results suggest that dysfunctional anger expression control program should be developed for students which may help those with covert narcissistic tendencies to functionally express their anger. Future research should analyze dating violence prevention and counseling programs.

• Journal of the Korea Society of Computer and Information
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• v.27 no.8
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• pp.203-210
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• 2022

In this study, we tried to examine the longitudinal mediating effects of school violence damage experience and aggression in the relationship between child maltreatment experiences and school bullying experiences. For the analysis data for this purpose, the 3rd, 5th, 6th, and 7th data of the Korean Children and Youth panel data of the Korea Youth Policy Research Institute were used. A total of 1,813 data were analyzed using the statistical program SPSS 26.0 and Amos 26.0 version as a multivariate latent growth model. As a result of the analysis, it was possible to confirm the mediating effects of school violence victimization experiences and aggression. These results suggest that multilateral efforts are needed to lower the level of maltreatment, school violence victimization, and aggression that affect the school bullying experiences. Based on the results of this analysis, this study specifically suggested practical measures to prevent adolescents' maltreatment experiences from being reproduced as school bullying experiences.

• Korean Journal of Social Welfare
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• v.64 no.1
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• pp.79-100
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• 2012

The predominant concern of the study consist in: (1) the direct effect of social commitment on teachers' intervention efficacy for helping both victims and offenders in school violence situation; (2) the indirect effects of both teachers' perceptions of offenders and victims, and fairness of school regulations on teachers' intervention efficacy. Research is based on a survey conducted with 351 teachers(84 males and 267 females) from 10 middle schools located in different districts of the city of Daegu. In order for subjects to verify research questions, structural equation models in teachers' intervention efficacy for helping both victims and offenders were explored. In order to verify the difference between mediators' effect, along with total indirect effect and each individual mediator's effects, bias-corrected bootstrapping analysis by using Mplus were employed. The major findings of the study supported the significance on direct effect of social commitment, and indirect effect of both fairness of school regulations and teachers' perceptions toward offenders and victims, on teachers' intervention efficacy. However, the indirect effect of fairness of school regulations(.025) was far outweighed by teachers' perceptions(.224) toward offenders and victims. In conclusion, the above findings claim our attention in that they provide a range of practical implications for teachers and other related professionals including school workers who are engaged in helping out both victims and offenders in school violence situation.