• 한국생활과학회지
• /
• 제21권6호
• /
• pp.1029-1042
• /
• 2012

The purpose of this study was to explore relationships between preschooler's aggression and social skills, maternal management strategies of peer relations and parenting behaviors and preschoolers' internet-game addictive inclination. Participants included seventy-seven (77) 5 to 6-year-old preschoolers (44 boys, 33 girls) and their mothers. The Aggressive Behavior Scale (Lee & Choi, 2001), the Social Skill Rating Scale (Suh, 2004), the Maternal Parenting Behaviors Scale (Rhu & Lee, 2007) and the Parental Involvement Checklist (Park, 2001) were used in this study. The Internet Game Addiction Scale (Korea Agency for Digital Opportunity and Promotion, 2006) was used to identify higher and lower addictive level of internet-game inclination. Collected data were analyzed by descriptive statistics and t-test. Major findings revealed that preschooler's social skills, maternal management strategies of peer relations and parenting behaviors showed a predictable correlation to preschooler's internet-game addictive inclination.

• 디지털산업정보학회논문지
• /
• 제6권3호
• /
• pp.37-47
• /
• 2010

In this paper, we propose an UCC broadcasting system in P2P based IPTV environments. Proposed system applies P2P based multiple chain architecture. UCC broadcasting system transfers data from not ISP server but UCC server peer that is included in DSLAM to joined peers. Therefore an algorithm to manage join and departure of peers have to modified. In this paper we propose an algorithm that does not increase an uplink bandwidth of DSLAM that include UCC server when peer joins to the UCC channel. We will show the improved performance of proposed scheme rather than general method with respect to the uplink bandwidth of DSLAM that include UCC server.

• 디지털산업정보학회논문지
• /
• 제6권4호
• /
• pp.75-81
• /
• 2010

Due to the increasing use of smart phones, using Wifi, Wibro of mobile devices spread. Accordingly, Need of using peer-to-peer file sharing between mobile devices is growing. However, common Peer-to-Peer(P2P) system is too complex and is not suitable to be applied to mobile devices. Thus, the need of research has shown to improve way in a mobile environment that has a constraints as mobility and the scope of communication. Among them, there is a Chord as contents look up algorithm. Chord is the issue. Chord as the DHT-based P2P protocol shares files, index-key and distributed key across the network. However, exist Chord doesn't consider the mobility. So, It has a lot of problems in the mobile environment. Thus, in this paper, I will try to explore an appropriate way of Chord in a mobile environment.

• 디지털산업정보학회논문지
• /
• 제7권4호
• /
• pp.1-6
• /
• 2011

In this paper, search-efficient Bi-directional-Chord(B-Chord) is proposed in P2P (peer-to-Peer) overlay network. Chord is the most popular P2P Look-up protocol. However, it applied to the mobile environment, the search success rate become lower and the request delay time increases. That is big problem. Thus, by improving the existing Chord, in this paper proposed B-Chord reduces the request delay time to in a mobile environment. Proposed B-Chord have the two Finger table and can search by selecting Finger table depending on the value of Key. By use these bi-directional, it can reduce the number of nodes Hop and search delay time. Thus, As a result, it will be able to increase the search success rate in a mobile environment.

• 한국인터넷방송통신학회논문지
• /
• 제16권6호
• /
• pp.65-73
• /
• 2016

수퍼피어 네트워크에 기반을 둔 P2P 시스템은 기존의 하이브리드 P2P 시스템과 순수 P2P 시스템이 결합된 장점을 나타내고 있다. 수퍼피어는 어떤 일반 피어들의 집단에 대해 서버처럼 동작하는 특수한 피어이다. 수퍼피어들의 네트워크를 구성하는 문제는 수퍼피어 네트워크에 기반을 둔 P2P 시스템에 있어서 중요한 문제 중의 하나이다. 기존의 P2P 시스템들은 2 계층으로 구성된 피어들에 기반을 두고 있다. 하나는 일반피어들로 구성된 계층이고 다른 하나는 수퍼피어들로 구성된 계층이다. 수퍼피어 네트워크는 랜덤 그래프의 형태를 가지고 있는 것이 일반적이다. 그러나 대규모 일반 피어들을 수용하기 위해서는 수퍼피어 네트워크 또한 그에 맞도록 확장되어야 한다. 본 논문에서는 이러한 대규모 P2P 시스템을 위한 트리 기반의 수퍼피어 네트워크의 계층적 구성 방법이 제안된다. 먼저 두 개의 계층으로 구성되는 단순 수퍼피어 네트워크의 구성이 소개되고, 그것을 일반화 그리고 확장 시키면서 다중 레벨 수퍼피어 네트워크로 확장하는 알고리즘이 제안된다. 단순 수퍼피어 네트워크도 좋은 특징을 가지고는 있으나, 제한된 레벨의 수 때문에 규모성에 문제를 나타낼 수 있어, 좋은 규모성과 클라이언트 노드들에 관한 관리의 용이성을 보여주는 확장 수퍼피어 네트워크라고 하는 k-레벨의 수퍼피어 트리로 확장 시킨다.

• 가정과삶의질연구
• /
• 제32권3호
• /
• pp.147-156
• /
• 2014

The purpose of this study was to investigate the moderating effect of negative emotionality on the association between mother-child intimacy and peer acceptance based on differential susceptibility model. According to differential susceptibility model, negative emotionality and difficult temperament is potential differential susceptibility factors. The participants were 3-year-old children recruited from preschools and daycare centers. Teachers completed measurement of negative emotionality. Peer acceptance was measured by peer nomination. Mother-child intimacy was reported by mothers. The results presented that negative emotionality significantly moderated the relation between mother-child intimacy and peer acceptance only for boys. For boys with high level of negative emotionality, mother-child intimacy significantly predicted peer acception. However, for boys with low level of negative emotionality, mother-child intimacy did not associate with peer acception. For girls, negative emotionality did not significantly influence the association between mother-child intimacy and peer acceptance. These findings support differential susceptibility hypothesis that vulnerable children are susceptible to positive parenting effects.

• 한국생활과학회지
• /
• 제13권5호
• /
• pp.659-672
• /
• 2004

This study examines different individual, family, and school environmental variables that affect victimization by peer aggression among adolescents. The sample consists of 868 seventh and eighth graders. Statistics and method for data analysis include Cronbach's alpha, percentage, means, standard deviation, Pearson correlation, multiple regression, and hierarchical regression. The major findings of this study are as follows: First, adolescents, both withdrawn and aggressive, have lower achievement in school work. Boys experience more direct victimization by peer aggression. Adolescents, especially boys, often experience indirect victimization by peer aggression, when they become withdrawn, own lower self-esteem, and have lower achievement in school work. Second, adolescents have more direct victimization by peer aggression when their parents are negligent of them. Also, adolescents seem exposed to indirect victimization by peer aggression when they receive more physical and emotional abuse and negligence from their parents. Third, adolescents experience more victimization by peer aggression-whether it's direct or indirect, when they cannot get adjusted to peer relations and get teachers' supervision. Fourth, as to direct victimization by peer aggression, withdrawal, one of the individual variables, is the most reliable prediction followed by gender, negligence, adaptability in peer relations, aggression, and teacher's supervision in sequence. For indirect victimization by peer aggression, withdrawal is the most reliable prediction followed by adaptability in peer relations, gender, physical and emotional abuse, and negligence in sequence.

• 가정과삶의질연구
• /
• 제22권4호
• /
• pp.115-126
• /
• 2004

The purpose of this study was to examine the relationships among parents' marital conflict perceived by school-aged children, children's aggression, and peer harassment six hundred thirty seven 5th and 6th graders (306 girls and 331 boys) participated in this study. Each participant completed a children's perception of parental conflict scale, a children's aggression scale, and a peer harassment scale. Major findings of this study are as follows: 1) In terms of physical harassment, boys were bullied and victimized more than girls. 2) Children's aggression was positively related to the physical and relational peer harassment. Parents' marital conflict was positively related to children's aggression. There was a statistically significant relationship between parents marital conflict and physical and relational peer harassment. 3) Parents' marital conflict and children's aggression influenced physical and relational harassment for both boys and girls.

• 가정과삶의질연구
• /
• 제27권5호
• /
• pp.115-122
• /
• 2009

This study investigated the mediating and moderating effects of teacher preference on the relationship between behavior problems and peer victimization. The subjects were 520 children in the fifth and sixth grades. Children completed peer nominations that assessed peer victimization. Teachers rated children's internalizing, externalizing problems and teacher preference. The full mediating effect of teacher preference was found in externalizing problems and the partial mediating effect was found in internalizing problems. Moreover, the moderating effect of teacher preference was found only in internalizing problems, which suggests that high teacher preference protects internalizing problems from peer victimization.

• 가정과삶의질연구
• /
• 제25권1호
• /
• pp.77-85
• /
• 2007

This study investigates aggressive children's perceptions of their social acceptance in conjunction with peer ratings of social acceptance. The subjects were 520 children in the fifth through sixth grades. Children completed questionnaires that assessed self-perceptions of social acceptance. In addition, they completed peer nominations that assessed peer victimization, aggression, and peer acceptance, while their teachers rated children's externalizing problems. The results suggest that aggressive children's self-perceived social acceptance is inflated in relation to the ratings of their peers. For aggressive-rejected children, a highly positive self-perception was shown to be not a protective factor, but rather a defensive posture that places the children at added risk.