• KSII Transactions on Internet and Information Systems (TIIS)
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• 제4권5호
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• pp.709-735
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• 2010

The reciprocal virtue of peer-to-peer networking has stimulated an explosion of peer population and service capacity, ensuring rapid content distribution in peer-to-peer networks. Critical issues such as peer churn, free riding, and skewed workload significantly affect performance results such as service agility, fairness, and resource utilization. To resolve these problems systematically, this study proposes a peer assignment scheme that supports fair peer-to-peer file sharing applications. The proposed scheme exploits the peer duality of both server-oriented peer capacity and client-oriented peer contribution. Accordingly, the system server can prioritize download requests and appropriately assign server peers to uploading file objects. Several functional extensions, including peer substitution and elimination, bandwidth adjustment, and distributed modification, help cope with subtle situations of service starvation and download blocking, and hence make the system design robust and amenable. Simulation results show this design is examined under both centralized and distributed peer-to-peer environments. Performance results confirm that the proposed mechanisms are simple but effective in maintaining service agility and fairness, without loss of overall service capacity in peer-to-peer files sharing systems.

• 한국수학교육학회지시리즈A:수학교육
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• 제55권4호
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• pp.503-522
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• 2016

The purpose of this study is to investigate the effects of peer-to-peer relay feedback strategy on achievement in mathematical problem solving and mathematical communication ability. The experimental instruction was given to 99 students. They were divided into two groups. In this research a strategy of peer-to-peer relay feedback is developed. To enhance lateral communication, students were instructed according to the strategy to read open-type problems, to write mathematical ideas individually and to share their ideas and get feedback in relay method with peers within a small subgroup. The results are as follows. 1) Mathematics achievement assessments were carried six times in the cleanup phases of the class. There was no difference at the 1st test. 2) The second t-test of mathematical communication abilities showed that there was meaningful difference and that peer-to-peer relay feedback was effective. But there was no difference on reading. 3) Peer-to-peer relay feedback strategy has a positive impact.

• 대한수학교육학회지:학교수학
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• 제13권1호
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• pp.127-153
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• 2011

수학학습에서의 개인차의 문제를 해결하는 현실적인 방법 중 하나가 교실에서 이뤄지는 또래교수이다. 일반적으로 또래교수는 기본학습과정을 먼저 끝낸 학습우수아가 기본학습과정을 이수하는데 어려움이 있는 학습부진아를 도와주는 방식으로 이뤄진다. 따라서 대부분의 또래학습에 관한 연구가 또래교사보다는 또래학습자의 학습에 초점을 맞춰왔고 이런 이유로 부진아 지도를 위한 방법 중 하나로 연구되어졌다. 그러나 또래교수가 학습 부진아에게 효과적인 방법이라고 할지라도 또래교사에게는 스스로 학습할 수 있는 기회를 제한할 뿐 아무런 이득이 되지 않는다면 효율적인 교수학적 방법이라고 보기 어렵고 윤리적이지도 못하다. 본 연구는 또래교수가 또래교사에게 어떤 영향을 미치는 지를 알아보는 것이 목적이다. 이를 위해서 또래교수가 이뤄지기 전과 후의 또래교사의 수학적 성향과 수학적 의사소통 능력의 변화를 살펴보았다.

• 한국지역사회생활과학회지
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• 제19권3호
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• pp.373-386
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• 2008

The purpose of this study was to examine the effects of parent-adolescent relationship and marital conflict perceived by adolescents on peer victimization. The subjects were 353 middle school students selected from two middle schools in the Incheon area. The instruments of research included the peer victimization index, the parenting behavior index, the parent-adolescent communication index, and the marital conflict inventory. The statistics used for this data were t-test, ANOVA, correlation analysis and multiple regression analysis. This study showed that middle school student's peer victimization was influenced significantly by the gender. Correlation analysis indicated that parenting behavior and peer victimization were significantly correlated. That is, oppressive, over protective and/or permissive attitudes of the parent were positively correlated with peer victimization. Intimacy and reasonable attitude were negatively correlated with middle school student's peer victimization. Also, parent-adolescent communication and peer victimization were significantly correlated. Especially, open communication was negatively correlated with peer victimization while problematic communication was positively correlated with peer victimization. Marital conflict perceived by adolescents was positively correlated with peer victimization. It was also found that gender, oppressive attitude, permissive attitude, open communication, and marital conflict were significant predictors of middle school student's peer victimization.

• 대한가정학회지
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• 제47권8호
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• pp.119-130
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• 2009

The purpose of this study was to investigate the interaction and effects of shame and parent-child communication on children and early adolescents' peer pressure. The subjects of this study were 359 children and early adolescents from 5th grade in elementary school to 2nd grade in middle school (187 boys, and 172 girls) in Daejeon city. The results of this research indicated that gender and age played a significant role on the effects of shame and parent-child communication on peer pressure. Open communication with mothers showed a positive relationship with boys' peer pressure, whereas open communication with father showed a negative relationship with boys' peer pressure. The interaction effects of shame and open-communication with fathers and mothers worked differently on peer pressure across gender and age. Interaction effects of shame and open communication with fathers and mothers were significant for boys, but not for girls. Interaction effect of shame and open communication with mothers was significant for children and adolescents.

• 한국보육지원학회지
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• 제18권6호
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• pp.127-144
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• 2022

Objective: The purpose of this study was to examine the relative influences of senior elementary school children's communication level with their fathers and peer competence on their happiness. Methods: The subjects of this study were 310 fifth and sixth grade students attending elementary school in Jeollanam-do. They responded to the level of communication with their fathers, peer competence, and happiness. For the data, t-test, Pearson's correlation analysis, and hierarchical regression analysis were performed. Results: First, there were some statistically significant differences according to gender differences in self-esteem and a sub-factor of happiness and the differences according to grades in open-type communication and problem-type communication. Second, it was found that children's happiness was highly correlated with communication with their fathers and peer competence. Third, the factors having the greatest relative influence on overall happiness were in the order of peer competence, open-type communication, problem-type communication, and gender. The variables influencing and the order of relative influence differed according to sub-factors of happiness. Conclusion/Implications: The present study revealed that peer competence has a significant impact on children's happiness. The results of this study suggest that research and development of convergent programs that can improve communication with fathers, peer competence, and children's happiness are necessary.

• 아동학회지
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• 제21권4호
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• pp.159-175
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• 2000

This study explored how communication with parents, relations with teachers and intra- and extra-mural activities were related to peer relationships. Data were collected from 453 middle school students in the city of Iksan. Results showed that students with more harmonious communication with parents reported more desirable peer relationships. More familiar and friendly relations with teachers was also associated with more harmonious peer relationships. As adolescents appeared more vigorous in intra- and extra-mural activities, they had friendlier peer relationships. Gender, communication with fathers, relations with teachers, and intra- and extra-mural activities had significant effects on peer relationships. Relations with teachers was the best predictor for peer relationships.

• 제어로봇시스템학회논문지
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• 제14권9호
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• pp.873-880
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• 2008

This paper deals with the peer-to-peer data communication to connect each distributed levels of developed unmanned system according to the JAUS. The JAUS is to support the acquisition of unmanned system by providing a mechanism for reducing system life-cycle costs. Each of distributed levels of the JAUS protocol divides into a system, some of subsystems, nodes and components/instances, each of which may be independent or interdependence. We have to distribute each of the levels because high performance is supported in order to create several sub-processor computing data in one processor with high CPU speed performance. To complement such disadvantage, we must think the concept that a distributed processing agrees with separating each of levels from the JAUS protocol. Therefore, each of distributed independent levels send data to another level and then it has to be able to process the received data in other levels. So, peer-to-peer communication has to control a data flow of distributed levels. In this research, we explain each of levels of the JAUS and peer-to-peer communication structure among the levels using our developed unmanned ground vehicle.

• Human Ecology Research
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• 제52권1호
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• pp.11-19
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• 2014

The purpose of this study was to analyze the effect of perceived parental neglect and abuse and peer attachment on school life adjustment according to children's gender. A total of 2,264 5th graders from the second Korea Child-Adolescent Panel Survey participated. The results were as follows: First, the boys had higher parental neglect and abuse scores than the girls, while the girls had higher peer attachment scores and higher school life adjustment scores than the boys. Second, every sub-element of school life adjustment was significantly negatively correlated with parental neglect and abuse regardless of the children's gender. Every sub-element of school life adjustment was significantly positively correlated with the 'communication' and 'trust' sub-elements of peer attachment regardless of the children's gender. In the case of the boys, the 'study activity' and 'peer relation' sub-elements of school life adjustment were significantly negatively correlated with the 'alienation' sub-element of peer attachment. For the girls, every sub-element of school life adjustment was significantly negatively correlated with the alienation sub-element of peer attachment. Finally, the factors of 'parental neglect and abuse', and the peer attachment sub-elements of 'communication', and 'trust' significantly predicted the boys' school life adjustment, while for girls, the significant predictors were 'parental neglect and abuse', 'communication', 'trust', and 'alienation'.

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