• Korean Journal of Child Studies
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• v.21 no.3
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• pp.85-105
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• 2000

The purpose of this study was to examine the influences of victimization by peers on self-esteem and the role of father/mother attachment and friendship with a range of 354 2nd-grade junior high school students(169 boys and 185 girls). The subjects reported victimization, father/mother attachment, friendship(number of friends and presence of a best friend), self-esteem and their peers rated victimization, too. The result indicated that (1) Victims in the end of the second semester were also those who were victimized by peers in the end of the first semester, (2) The victimization by peers effected on self-esteem in boys and girls, (3) The interaction effect of victimization and parent attachment on self-esteem was statistically significant only for boys, and friendship on self-esteem was statistically significant only for girls.

• Journal of the Korean Home Economics Association
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• v.42 no.12 s.202
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• pp.55-67
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• 2004

The purpose of this study was to investigate the associations between adolescent risk behaviors and correlates of risk behaviors. Questionnaires were completed by 955 high school freshmen in the Daegu${\cdot}$Kyungpook area and included measures of risk behaviors, coping, self-esteem, social competence, attitudes toward risk behaviors, parental attachment, autonomy, parental monitoring, and peers' risk behaviors. The major findings were as follows. (1) Parental attachment, autonomy, and appropriate parental monitoring were positively correlated with adolescent coping, self-esteem, social competence, and peers' desirable behaviors, but were negatively associated with peers' risk behaviors and attitudes toward risk behaviors. (2) Of all the variables, peers' risk behaviors and favorable attitudes toward smoking had the greatest influence on adolescent drinking and smoking, following by favorable attitudes toward drinking, social competence, and gender (3) Similar to adolescent drinking and smoking, of all the variables, peers' risk behaviors had the greatest influence on adolescent delinquency, following by favorable attitudes toward smoking and gender.

• Korean Journal of Childcare and Education
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• v.15 no.5
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• pp.1-22
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• 2019

Objective: This study aimed to explore whether and how infants showed their empathy in everyday lives at a childcare center. Methods: The participants of this research were 10 infants (23~31 months) attending a one-year-old classroom in a childcare center located in Seoul, and the data were collected primarily thorough participant observations. Results: The infants showed four categories of empathy in their everyday lives. The first one was related to the safety of their peers; it was presented when the infants found out that their peers were sick, in trouble, and having a hard time separating from their parents, or when they found possible risks to their peers. The second one was related to the achievement of their peers; it was presented when the infants noticed their peers trying hard to continue their play. The third one was related to the infants' pleasure; it was presented when they felt shared interests and joy with their peers. The fourth one was related to the infants' self-reflection; it was presented when the infants found out that what they had been doing made their peers upset. Conclusion/Implications: These results demonstrate infants' ability to empathize with others and also imply the need to support their development of empathy continuously.

• Journal of Korea Multimedia Society
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• v.11 no.10
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• pp.1409-1419
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• 2008

Inauthentic resources can be easily spread by P2P (Peer-to-Peer) participants due to the openness and anonymity of P2P networks. A possible way to restrict the distribution of inauthentic resources and prevent malicious peers from joining P2P networks is to exploit peers' reputation which reflect their past behaviors and are also helpful to predict peers' future behaviors. There is a possibility that some peers intentionally plays along with other peers in order to increase/decrease its reputation through false feedback exchanges. Therefore, we propose a new reputation management scheme, called TrustRRep (Trustable Resource sharing service using Reputation) scheme, which improves the trustworthiness and efficiency of P2P networks by identifying peers who give false feedback. The TrustRRep scheme is also capable of providing peers with the trustworthiness of shared resources by discriminating resources distributed by malicious peers. We implement the proposed TrustRRep scheme on the NS-2 simulator for evaluating its performance compared to the recent reputation management work available in literature. A case study on simulations shows that the proposed reputation management scheme yields efficient performance in terms of the minimal download ratio and dissemination of inauthentic resources, the efficient identification of peers who give false feedback, and the provisioning of the trustworthiness of peers' reputation. It also shows that the proposed TrustRRep scheme imposes the restrictions of participating P2P networks on a malicious peers by diminishing its trust value.

• Journal of the Korea Society of Computer and Information
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• v.16 no.2
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• pp.121-129
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• 2011

With advances in wireless networks and advent of powerful mobile devices such as smart phones, the demand for mobile IPTV services has been increasing. It is essential to minimize the energy consumption of mobile devices because their battery capacity is limited. In this paper, we therefore propose a new streaming structure in P2P-based mobile IPTV systems to minimize the energy consumption of mobile peers using agent peers. Agent peers can decrease the energy consumption of mobile peers significantly by performing streaming functionality and exchanging control messages for joining and leaving overlay networks in place of corresponding mobile peers. Finally, by simulation experiments using an energy model, we show that our proposed streaming structure can increase the lifetime of mobile peers using agent peers.

• Korean Journal of Child Studies
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• v.29 no.4
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• pp.135-146
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• 2008

This study explored mediating effects of the preschooler's emotional intelligence between maternal parenting behaviors and exclusion by peers. Subjects were 138 4- to 5-year-old preschoolers(92 boys, 46 girls) and their mothers. Exclusion by peers was measured by the Child Behavior Scale(Ladd & Profilet, 1996), maternal parenting behaviors were measured by the Parenting Questionnaire(Park, 1999), and preschooler's emotional intelligence was measured by the Emotional Intelligence Questionnaire(Lee, 1998). Data were analyzed by descriptive statistics and multiple regression analysis. Results showed that preschooler's emotional self-awareness mediated the effects of both maternal sensitive behaviors and maternal hostile/refusal behaviors on preschooler's exclusion by peers.

• Korean Journal of Child Studies
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• v.21 no.1
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• pp.307-322
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• 2000

This study examined the relation between parent attachment, peer rejection, and friendship in 768 eighth grade students and victimization by peers in early adolescence. The subjects reported on father attachment, mother attachment, and victimization. Victimization was also rated by peers and teachers. The subjects were assessed on peer rejection and friendship(number of friends and presence of a best friend). The results indicated that (1)Father attachment and mother attachment were negatively related to self-reported victimization; (2)Peer rejection was positively related to victimization; (3)The number of friends was negatively related to victimization rated by peers, and victimization rated by peers varied as a function of the presence of a best friend only for girls; (4)The relation between parent attachment and victimization was not mediated by peer rejection or friendship, which indicated that parent attachment had a direct influence on victimization.

• Korean Journal of Child Studies
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• v.23 no.3
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• pp.35-49
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• 2002

This study examined the developmental characteristics of friends and disliked peers in 169 children and adolescents, including 44 preschool children, 43 primary school, 42 middle school, and 40 university students. Their descriptions of 2 same gender friends and 2 disliked same gender peers were categorized with an 81 category coding system. Comparisons across age and sex were made by a cross-tabulation test. Results showed that the reported characteristics of friends and disliked peers varied by age, but there was no sex difference. That is, younger children liked their friends because they played together, their friends were generous and attractive, but older children liked friends because they had some similarity, were reliable allies, caring and concerned. Younger children's disliked peers were aversive, aggressive and hyperactive while older children's disliked peers were dissimilar and snobbish.

• Korean Journal of Child Studies
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• v.33 no.6
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• pp.35-49
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• 2012

The purpose of this study was to investigate the relationship between covert/overt narcissism, self-control, and peers' vulgar slang use and school aged boys' and girls' vulgar slang use. The subjects consisted of 263 boys and 256 girls in the 5th and 6th grades attending elementary schools located in Daegu and Gyeongbuk Province. The data collected were analyzed by means of t-test, paired t-test, Pearson's correlation, simple regression, multiple regression, using the SPSS Win 19.0. The results were as follows. 1) School aged boys' and girls' vulgar slang was found to positively associated with covert/overt narcissism. 2) School aged boys' and girls' vulgar slang use was found to be negatively associated with self-control. 3) School aged boys' and girls' vulgar slang use was found to be positively associated with peers' vulgar slang use 4) Among the variables of covert/overt narcissism, self-control, and peers' vulgar slang use, peers' vulgar slang use was the best predictor for school aged boys' and girls' vulgar slang use.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.4 no.5
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• pp.799-818
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• 2010

In traditional unstructured P2P file sharing network, each peer establishes connections with a certain number of randomly chosen other peers. This would lead to redundant traffic and P2P network partition in mobile ad hoc network (MANET). We propose an approach to construct an efficient unstructured P2P overlay over MANET using underlying cluster-based routing (CBRP). One of the peers in the P2P network is used as a root-peer to connect all peers. Each peer maintains connection with physically closer peers such that it can reach the root-peer. The peer constructs a minimum-spanning tree consisting of itself, its directly connected neighbor peers and 2-hop away neighbor peers to remove far away redundant links and to build an overlay closer to the physical network. Due to on-demand nature of inter-cluster routing of CBRP, the positioning algorithm for MANET is used to retrieve the file by a peer from the source peer via shorter path in the physical network. We can show by simulation that our approach performs better in comparison with the existing approach.