• KSII Transactions on Internet and Information Systems (TIIS)
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• v.10 no.9
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• pp.4207-4222
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• 2016

In a P2P (Peer-to-Peer) VoD (video-on-Demand) streaming system, the nodes' load is an important factor which affects the system performance. In the system, some nodes may receive too many requests, which leads to overload. On the other hand, some other nodes may receive too few requests, which leads to low utilization. Therefore, designing a reasonable load balancing strategy is important. However, existing related studies cannot handle this problem effectively, because they don't have an efficient dynamic load information management mechanism, and they don't distinguish the difference of requests when transfer the nodes' load. In this paper, to manage the dynamic load information efficiently, we design a load management table for each node. Based on the load information, we propose a load balancing strategy which uses a request migration algorithm (LBRM). Through simulations, our scheme can handle the load imbalance problem effectively and improve the users' playback fluency.

• Child Health Nursing Research
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• v.15 no.2
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• pp.219-227
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• 2009

Purpose: This study was done to evaluate depression in child cancer survivors. Methods: The participants in this descriptive research were 103 adolescents who agreed to participate. All of the adolescents were diagnosed as completely cured but remained under follow-up observation as outpatients. A structured questionnaire including the depression scale developed by Shin et al. (1991), a self-esteem scale developed by Rosenberg (1965) and a social support scale developed by Kim & Park (1999), Lee (1997) were used for data collection. The data were analyzed using SPSS. Results: The mean scores were, for self-esteem, 36.01, for paternal support, 57.21, for maternal support, 59.98, for peer support, 22.19, for teachers support, 21.07 and for depression, 27.95. Scores for depression were significantly different according to academic achievement, satisfaction with appearances, diagnosis and prognosis. Depression was negatively correlated with self-esteem, paternal support, maternal support, peer support, and teachers support. Variables affecting depression were peer support and self-esteem, accounting for 47.0% of the variance. Conclusion: The findings indicate that peer support and self-esteem, follow by maternal, paternal and teachers support, are important variables in the occurrence of depression in these adolescents. Further study is needed to develop strategies to increase this support and self-esteem.

• Korean Journal of English Language and Linguistics
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• v.3 no.3
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• pp.453-497
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• 2003

The purpose of this study is to investigate social aspects of young EFL learners' interaction at the computer. Data were taken from the interactions of three pairs of fourth-grade primary school children who worked together on English learning software. Their interactions at the computer were videotaped and then all the talk produced by the students and the utterances emitted from the computer were transcribed. As for the analytical tools, the notion of ‘contextualization cues’ (Gumperz, 1982) and the concept of ‘positioning’ (Davies & Harre,1990) were employed. The analysis reveals that the roles of the students were not tied to a certain position, but rather dynamically changed during the course of interactive work according to the situation at hand. The dynamic changes in their positions were realized through various means; their capability in solving problems, their taking responsibility or assigning it to each other, or cooperation. There were also instances of peer teaching and motivated learning. In addition, the students showed autonomy in their learning activity. These findings suggest that both students in a dyad had their own place in performing task activities, contributing to solving problems and getting benefits from peer interaction. Furthermore, students' working together on English learning software may provide an environment which can promote cooperative attitude and responsibility for learning and enhance motivation and autonomy in their learning process.

• The Journal of Korean Association of Computer Education
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• v.15 no.2
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• pp.19-28
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• 2012

Recent popularity of smart devices and social media seem to increase much interests on social learning, Despite of positive expectation on technology-based social learning, there are not many successful cases and practices of how to apply hands-on technologies and measure educational results. In this study, we tried to promote idea-sharing among learners in a classroom using web-based peer-review of assignments on a specific topic. Then we investigated effects of idea-sharing among learners in terms of individual knowledge construction. Experimental results show that idea-sharing promotes knowledge convergence and divergence, and then knowledge construction at learner's own.

• Journal of the Korean Home Economics Association
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• v.43 no.9 s.211
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• pp.109-127
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• 2005

The present study examined the relationships among maternal attachment, self-concept, peer relationship, and school adjustment. The subjects were 293 Korean-Chinese elementary school students living in Yanji and Shenyang, China. The Inventory of Parent and Peer Attachment (Armsden & Greenberg, 1987), Social Competence Inventory(Doh & Falbo, 1999), and Self-Perception Profile for Adolesents(Harter, 1988) were used to measure the subjects' maternal attachment, and peer relationship, school adjustment, and self-concept, respectively. When structural equation modeling was applied, the results supported not only the model that maternal attachment and self-concept exert an influence on peer relationship, but also the model that they exert an influence on school adjustment. The results of this study suggest that the secure maternal attachment of Korean-Chinese works as an important mechanism that explains their peer relationship and adjustment at elementary school.

• Korean Journal of Child Studies
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• v.30 no.4
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• pp.33-46
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• 2009

In this analysis of relationships among parent-child communication style, child's sense of identity, and their effects on child's peer relationships, a survey was conducted of 506 6th grade students in 3 elementary schools of Incheon City. Data were analyzed by t-test, ANOVA, Pearson's correlation, and multiple regression analyses. Results showed that : girls had higher scores in academic identity and more positive factors in peer relationships than boys; when communications between parents and children were more open, peer relationships were more positive and less negative; children with a stronger sense of identity had more positive factors in peer relationships; social identity was the most influential factor in positive and general identity was the most influential factor in negative peer relationships, respectively.

• Korean Journal of Child Studies
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• v.31 no.1
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• pp.19-33
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• 2010

This study examined the effects of family climate, peer support and self-esteem on children's self-regulation. The participants in this study were 369 children (M=11.78 year) who completed questionnaires regarding family climate, peer support, self-esteem and self-regulation. Data were analyzed means by of a Structural equation model using AMOS 7.0. Our results indicated that (1) family climate, peer support and self-esteem were directly linked with children's self-regulation (2) the associations between family climate or peer support and children's self-regulation were mediated by children's self-esteem. These results imply that family climate and peer support are important antecedent variables in predicting children's self-regulation as well as their relative levels of self-esteem.

• Korean Journal of Child Studies
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• v.19 no.1
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• pp.43-53
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• 1998

This study investigated the relations among maternal cognition, maternal supervisory/monitoring behaviors, and their children's peer competence. The participants were 40 kindergarten children and their mothers. The mothers completed a questionnaire concerning maternal beliefs about children's social skills. Also their supervisory/monitoring behaviors were observed in the context of child-peer interactions. Children's peer competence was measured using a sociometric status measure and a peer acceptance rating scale. Maternal beliefs were related both to the quantity/quality of maternal supervisory/monitoring behaviors and to children's peer competence. Maternal supervisory/monitoring behaviors were also related to children's actual peer competence.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• v.13 no.1
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• pp.177-188
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• 2002

Objectives：The major goal of this study was to investigate and compare the behavior problems and mothers' rearing pattern between adolescent psychiatric patients either neglected or rejected by peer and those who were neither neglected nor rejected by peer. Methods：Adolescent psychiatric patients(N=25) performed peer neglect scale, peer reject scale. And their mothers performed the part of Child Behavior Checklist(CBCL), Maternal Behavior Research Instrument(MBRI), the scale for the maternal concern about the social life of their own patients, and the scale for maternal concern about the friendship of their own patients. According to the score of the peer neglect scale and the peer reject scale, we divided the patients into 'peer neglect-reject' group(n=15) and ‘on-loneliness’ group(n=10), and compared the scores of other scales between each group. Also, we investigated the correlation among all scales. Results：1) The scores of the part of CBCL(p<.05), depressed/anxious subscale of CBCL(p<.05) and thought problem subscale of CBCL(p<.01) in peer neglect-reject group were significantly higher than those in non-neglect group. The score of peer neglect scale was significantly correlated with that of the part of CBCL(r=.516), depressed/anxious subscale of CBCL(r=.483), thought problem subscale of CBCL (r=.651), social problem subscale of CBCL(r=.517). And the score of peer reject scale was significantly correlated with that of attention subscale of CBCL(r=.414), thought problem subscale of CBCL(r=.446), social problem subscale of CBCL(r=.531). 2) But, each group was not significantly different on the scores of MBRI, the scale for the maternal concern about the social life of their own patients, and the scale for maternal concern about the friendship of their own patients. And there were no significant correlation between the scores of peer neglect / peer reject scale and those of scales for maternal rearing pattern. Conclusion：The thought problem and depression/anxiety problem of adolescent psychiatric patients neglected or rejected by peer were estimated more higher than those of adolescent psychiatric patients neither neglected nor rejected by peer. But, from the view of maternal rearing pattern, each 2 groups seemed not to be different. Further research using more subjects will be needed.

• Korean Journal of School Psychology
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• v.8 no.2
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• pp.153-173
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• 2011

In a group of 353 elementary students, the present study examined the moderation effects of prosocial behaviors and social competence in the relations between overt/relational aggression and peer status (social preference and perceived popularity). The results indicate that both overt aggression and relational aggression lowered social preference regardless of gender. Prosocial behaviors and social competence did not buffer the negative influence of aggression on social preference. Among boys, overt aggression was a significant predictor of increased perceived popularity. Although inconsistent, relational aggression also predicted boys' perceived popularity. However, among girls, relational aggression, not overt aggression, was associated with perceived popularity. The moderation effects of prosocial behaviors and social competence were significant only among boys. In other words, boys' aggression, although it lowers social preference, contributes to their social influence and dominance when it is effectively combined with positive characteristics. It is necessary to develop new intervention strategies which reflect the adaptive function of aggression within peer groups.