• Proceedings of the Korea Information Processing Society Conference
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• 2003.11a
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• pp.591-594
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• 2003

본 논문은 중심 화소의 FOD 성분값과 인접 가해 성분값의 평균으로 축소 성분값을 산출함으로써 FOD에 적응성을 부여한 디지털 영상 축소 알고리즘의 성능을 분석함에 그 목적이 있다. 제안된 방법은, 중심 화소의 우측 및 하측 인접 화소의 기울기의 크기를 이용하여 산출한 각각의 국부 가해 가중치를 우측 및 하측 인접 화소값에 곱한 후에 그 결과를 합산함으로써 인접 가해 성분값을 구하고 FOD 성분값과 이 인접 가해 성분값을 평균하여 축소 성분값을 구하는 과정을 전체 영역에 반복적으로 수행함으로써 축소 영상을 얻을 수 있다. 제안된 축소 방법에 따르면, 적은 연산량을 요하면서도 평균적으로 우수한 결과를 제공하는 FOD 방식의 장점을 취하면서 인접 화소의 유효 가해 성분을 각각의 국부 가해 가중치에 따라 축소 성분값에 적응적으로 반영함으로써 FOD의 단점인 몽롱화 현상을 효과적으로 억제시킬 수 있는 바, 개선된 정보 보존성을 제공할 수 있는 이점이 있다. 본고에서는 주관적인 성능과 하드웨어 복잡도 측면에서 제안된 방법과 기존의 각 방식에 대한 성능을 분석 평가한다.

• Korean Journal of Culture and Social Issue
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• v.24 no.1
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• pp.1-27
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• 2018

The purpose of this study was to identify the persistent and dynamic association between bullying and victimization. Gender differences in patterns of school bullying was hypothesized based on the literature. Analysis were based on waves 3-6 of the Korea Children and Youth Panel Survey, a nationally representative data of primary and secondary school students in South Korea (N = 1,881). Autoregressive cross-lagged model was employed to identify the reciprocal association between bullying and victimization in longitudinal data. As hypothesized, regardless of gender, lagged effects were statistically significant between each time points such that current bullying caused future bullying and current victimization led to future victimization. However, there was no cross-lagged effects of current victimization on future bullying nor current perpetration on future victimization for both male and female youth. Findings from this study may have implications for designing policies against school bulling. Not only is short-term intervention for handling immediate psycho-social maladjustment important, but so are long-term plans that prevent youth from falling into continued perpetration and victimization in the system of school bullying.

• Korean Journal of Culture and Social Issue
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• v.27 no.4
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• pp.391-410
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• 2021

The purpose of this study is to explore the mediating effect of violence justification, including actor-effect and partner-effect, in the process where the offense motive affects dating violence. The subjects of this study were 135 unmarried male and female couples aged 19 and over who were dating for more than 3 months, and each couple was subjected to a self-report scale on motives, justification of violence, and dating violence. Based on these paraphrasing, as a result of analyzing the path model using the Actor-Partner Interdependence Model, Men and women's motivations showed a direct effect on their dating violence, while women's motivations showed a significant partner effect on men's violence. The male's motivation also had a significant impact on his dating violence and partner's abuse of dating violence as a mediator for justification of his violence. On the other hand, the mediating effect of justifying violence in women was not significant. These results show that there is a gender difference between the motives for violence and the paths for justifying violence in the sex violence of men and women. Finally, the implications and limitations of this study, and suggestions for follow-up studies were discussed.

• Journal of The Korean Association of Information Education
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• v.6 no.3
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• pp.328-337
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• 2002

Looking at multimedia education contents from a design point of view, the instructor's design model may differ from the child's understanding model due to gap of the instructor's and child's knowledge. This fact implies it impacts the effectiveness of the education contents. The learning efficiency of Korean typography in WBI for children depends on the font-family, line space, font-size, the age of user, the output device such as the monitor, and other various factors. In this paper, we measured and analyzed on readability of Korean typography in WBI for children by reading speed method. The results of experiments show that readability depends on the font-family of typography, age(grade), and sex of children. In detail, "Goolymche" has the shortest time to be read, and girl and the highest grade students of elementary school have shorter time than boy and the lower grade students. Moreover, we consider the elegance of typography in WBI for holding children's interests because they prefer "Yopseoche". We provide some CSSs in WBI for children based on the experimental results, to used in school fields.

• Korean Journal of School Psychology
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• v.16 no.1
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• pp.17-38
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• 2019

This study was conducted to identify the relationship between child abuse and school violence and whether aggression and depression have any mediating effects on this relationship. This study analyzed the responses of 1,937 eighth grade students. The main results of this study were as follows. First, child abuse was positively correlated with school violence aggression and school violence victimization. Second, aggression and depression mediated the effect of child abuse on aggression and victimization, respectively. Third, aggression mediated the effect of child abuse on victimization. Fourth, although there was a reciprocal causal relationship between aggression and victimization, school violence victims who were abused by their parents were less likely to be the perpetrators of violence themselves. These findings have implications regarding the use of counseling intervention to prevent violence in schools.

• Journal of the Korea Convergence Society
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• v.11 no.2
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• pp.297-307
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• 2020

This study focused on the problem behavior after drinking, and examined the effects of temperament of adult drinker on offensive behavior and analyzed the sequential mediating effects of aggression and drinking behavior. To this purpose, 299 subjects were assessed through the Temperament and Character Inventory(TCI)-for adults, Korean Aggression Questionnaire, and Korean Alcohol Use Disorder diagnosis. As the results, 'Novelty seeking' had the highest level of explanation for aggression. In the relationship between 'Novelty seeking' and offensive behavior, mediating effect of aggression and drinking behavior were significant. In its course, sequential mediating effect of both was shown as complete mediation. This result implies that the aggression and drinking behavior were the factors of connecting 'Novelty seeking' and offensive behavior, and the characteristic of 'Novelty seeking' does not have direct influence on offensive behavior but only through aggression and offensive behavior that it has such effect.

• The Journal of the Korea Contents Association
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• v.17 no.8
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• pp.597-609
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• 2017

The aim of this study is to identify factors that the victimization by family violence has influence on peer violence perpetration through the mediation of anxiety and aggression in out-of-school youths. Subjects consist of 169 out-of-school youths in Chungbuk and data are analyzed by regression analysis with 18.0 version. The findings of this study are as follows. First, the victimization by family violence has positive influence on peer violence perpetration. Second, when the mediating effect of anxiety and aggression is tested, aggression only plays a mediating role between family violence victimization and peer violence behavior. On the basis of the results, this study suggest that we make efforts such as prompt intervention for out-of-school youths and their's family after school dropout, the reinforcement of family relationship, family function and youth competency, and the transition of social perception regarding out-of-school youths to decrease family and peer violence.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 1999.04a
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• pp.179-180
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• 1999

• Journal of Digital Contents Society
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• v.9 no.1
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• pp.17-26
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• 2008

This paper has for its object to propose AFOD(Adaptive First-Order Decimator) which sets a value of decimated element as an average of a value of neighbor intelligible component and a output value of FOD(First-Order Decimator) for the target pixel, and to analyze its performance in terms of subjective image quality and hardware complexity. In the proposed AFOD, a target pixel located at the center of sliding window is selected first, 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 local intelligible weight. Next, a value of neighbor intelligible component is defined by adding a value of the right neighbor pixel times its local intelligible weight to a value of the lower neighbor pixel times its intelligible weight. Since the proposed method adaptively reflects neighbor intelligible informations of neighbor pixels on the decimated element according to each local intelligible weight, it can effectively suppress the blurring effect being the demerit of FOD. It also possesses the advantages that it can keep the merits of FOD with the good results on average but also lower computational cost.

• Journal of Korean Society of Forest Science
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• v.89 no.5
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• pp.609-617
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• 2000

To inverstigate the boring insects in Pinus densiflora forests, bait logs were set up in healthy-looking forests of Chunchon Hongchon and in damaged forests(gall formation rate 70----) by Thecodiplosis japonensis of Pyongchang Jeongsun. The period of investigation was from April to August in 1999. Boring insects investigated were 35 species of 12 families. Five species of them were unrecorded species from Korea. Natural enemies investigated were 5 species of 2 families. The prefered parts of tree according to species of boring insects were lower trunk in Siphalinus gigas and 3 other species, middle-stem in Monochamus sutor and 7 other species, and top stem in Orthotomicus suturalis and 1 other species. Hylurgops interstitialis were found in all parts of tree. Sap wood was attacked by Xyleborus validus Cerambycidae, heart wood by Hylobitelus haroldi Siphalinus gigas, and cambium region by Pissodes nitidus P. obscurus Shirahoshizo insidiosus Scolytidae.