• 한국산학기술학회논문지
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• 제17권12호
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• pp.611-620
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• 2016

기업들은 경쟁 속에서 성장한다. 경쟁은 성장의 기본 동력으로, 기업들은 경쟁 속에서 살아남기 위해 부단한 노력을 기울인다. Competitive rivalry-based theory에 따르면 기업은 경쟁 속에서 경쟁에 수반되는 위험을 회피하기 위해 경쟁기업들의 결정을 모방 한다고 한다. 본 연구는 국내 기업들의 투자 결정에 미치는 경쟁기업들의 영향에 대한 실증적인 연구이다. 본 연구의 연구 결과는 경쟁기업이 기업의 투자 결정에 통계적으로 상당히 유의한 영향을 미친다는 것과 이러한 영향은 기업 간 경쟁이 심화되면 될수록, 그리고 부채비율이 높아질수록 모방의 정도가 강해진다는 것을 보여주고 있다. 모험회피 이론에 의하면 기업들이 모방하는 이유는 경쟁에서 비용을 적게 들이고 손쉽게 정보를 얻으려하기 때문이라고 한다. 연구 방법론으로는 내생성 문제를 해결하기 위해 주가 수익률을 매개 변수로 사용하여 Two Stage Least Square(2SLS) 방법을 사용하여 경쟁기업들의 투자 결정이 기업의 투자 결정에 미치는 영향을 연구 분석하였다. 이 연구결과는 기업들이 투자결정하는데 있어서 어느 정도로 경쟁그룹을 인식하느냐에 대한 중요한 단서를 제공한다고 할 수 있다.

• 아동학회지
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• 제27권2호
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• pp.181-194
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• 2006

The influence of peer relationships and teacher's support on the development of self-concept was assessed in Chinese immigrant, Korean-Chinese, and Korean middle and high school students. Subjects were 205 Chinese immigrants in Seoul, Korea, 256 Korean-Chinese in Shenyang, China, and 368 Korean adolescents in Seoul and Ulsan, Korea. Data were analyzed by ANOVA, factor analysis, and multiple regression. Results showed that the self-concept score of Korean-Chinese was highest followed by Chinese immigrants in Korea, and Korean adolescents, in that order. The self-concept of Chinese immigrant adolescents was influenced by peer relationships, of Korean-Chinese by teacher's support, of Korean adolescents by both peer relationships and teacher's support.

• 대한가정학회지
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• 제46권7호
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• pp.85-93
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• 2008

The purpose of this research was to investigate the prevalence of peer harassment in preschool children and assess its influence on self-concept, hyperactivity, and behavioral problems. The participants were 4 and 5 year old children recruited from preschools and day care centers. Results indicated that a small group of children were identified as victims by self and teacher-reports. Negative self-concept and hyperactivity predicted self-reported victimization. In addition, hyperactivity, internalizing, and externalizing problems were significant contributors in teacher reported victimization.

• 아동학회지
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• 제23권3호
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• pp.1-15
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• 2002

The subjects of this study were 4th to 6th grade children and instruments were the Teenage Inventory of Social Skills, the Internal-External Control Scale, the Self-Esteem Scale, and the Peer Relations Questionnaire. In the concurrent study, children lower in social skills and in self-esteem and external in locus of control reported more bullying and victimization. Children higher in social skills and in self-esteem and internal in locus of control reported more prosocial behavior. In the prospective study, children lower in social skills were more involved in bullying and victimization. Children higher in social skills reported more prosocial behavior. The effects of locus of control and self-esteem on peer relations diminished over time. However, social skills had a significant influence on bullying, victimization and prosocial behavior up to two years later. Children lower in psychosocial development were more vulnerable to peer victimization.

• 가정과삶의질연구
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• 제30권1호
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• pp.15-28
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• 2012

The purpose of this study was to investigate the difference in self competence between children from multicultural families and children from Korean families, and to study how interparental conflict and peer relationship influence the self competence of children. The subjects of the present study were 138 children of multicultural families and 254 children of Korean families in the 3rd or 4th grade in Seoul, Daegu, Gyeong-gi province, and Gyeong-buk province. The instruments of measurement were the Children's Perception of Interparental Conflict, Friendship and the Perceived Competence Scale for Children. Date were analyzed by independent samples T-test, MANCOVA, ANCOVA and multiple regression using the SPSS program. The results showed there was significant difference in the self competence of children between those from multicultural families and those from Korean families, but there was no significant difference when income was controlled. Second, for children of multicultural families, gender, income, and the intensity of interparental conflict had significant influence on self competence while gender, aid, conflict, and disclosure of negative affect in friendship, and being a peacemaker in interparental conflict influenced self competence significantly in the case of children of Korean families.

• 가정과삶의질연구
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• 제24권5호
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• pp.239-249
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• 2006

The main purpose of this study was to examine the relations of children's shyness and maternal involvement in children's peer relations to children's social competence, and the relative influence of children's shyness and maternal involvement in children's peer relations on children's social competence. 195 mothers of 3-year-olds and their 13 teachers in Seoul and Gyeonggi province participated in the study. The data were obtained using three kinds of questionnaires regarding shyness, parental involvement, and social competence. Findings revealed that shy children showed less popularity leadership and social participation for both boys and girls. The more orchestrations mothers exerted, the more popularity leadership boys showed. And the more advice and support mothers provided, the more interpersonal adjustment girls showed. For boys, shyness was more influential on popularity leadership than maternal orchestrations were. Findings are discussed in terms of the role of shyness in children's early social competence for both boys and girls.

• Human Ecology Research
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• 제52권5호
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• pp.541-549
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• 2014

The purpose of this study was to analyze the effects of preschool children's behavioral and emotional regulation on their peer play behavior, focusing on gender differences. A total of 214 4- and 5-year-old children attending a child care center in South Korea participated in this study. The instruments used in this study were the Child Behavior Rating Scale, Emotion Regulation Checklist, and Penn Interactive Peer Play Scale. The collected data were analyzed using a Student's t -test, Pearson's partial correlation, and multiple regressions with the SPSS software ver. 16.0. The main results of this study are as follows: first, there was a significant gender difference in preschool children's behavioral regulation, emotional control, play interaction, and play disruption. However, there was no gender difference in preschool children's play disconnection. Second, preschool children's emotional control and behavioral regulation had positive effects on their play interaction irrespective of gender. Third, preschool children's emotional instability and emotional control had a positive influence on their play disruption irrespective of gender. Finally, the factors of behavioral regulation and emotional instability significantly predicted the boys' play disconnection, while for the girls, the significant predictor was emotional control. Further, implications for the use of early intervention targeting specific behavioral and emotional regulation problems have been discussed.

• Human Ecology Research
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• 제54권3호
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• pp.307-319
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• 2016

This study examined the influences of both peer and parent-child relationships on suicidal ideation in adolescents with a focus on interpersonal relationships in adolescence that can act as risks as well as protective factors for youth suicide. This study analyzed 5,440 middle and high school students drawn from data, the seventh Happy Planet Index of children-adolescent in Korea, and conducted a series of logistic regressions. The results are as follows. First, both direct and indirect involvement in the school violence affects suicidal ideation as a risk factor in peer relationships. However, the quality and quantity of close friends of adolescents do not represent a protective role against suicidal ideation insofar as they are exposed to school violence. Second, adolescents who live apart from one of their parents are vulnerable to suicidal ideation than those who live with two parents. Third, very poor parent-child relationships in adolescence are not necessarily associated with suicidal ideation in adolescents. Fourth, shared time or activities between parents and adolescents in terms of family meal times are more likely to reduce suicidal ideation in adolescents than the emotional characteristics (trustworthiness or a close relationship) of parents and adolescents. The findings provide implications that frequent contact and shared activities in terms of family dining may contribute to the prevention of adolescent suicide.

• 한국게임학회 논문지
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• 제16권4호
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• pp.7-14
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• 2016

본 연구에서는 청소년들의 게임이용에 있어서 또래집단의 영향력이 게임 과몰입에 어떠한 영향을 미치는지를 살펴보고자 하였다. 구체적으로 게임이용의 주관적 규범성을 중심으로 하여, 또래관계 내 정서적지지, 교우관계 스트레스, 친구들의 게임에 대한 태도가 게임 과몰입에 미치는 영향을 분석하였다. 연구결과, 또래관계 내 정서적지지가 낮을수록, 게임이용의 주관적 규범과 교우관계 스트레스가 높을수록, 게임 과몰입이 높아지는 것을 알 수 있었다. 한편, 친구들의 게임에 대한 태도는 게임 과몰입과 통계적으로 유의미한 관련이 없는 것으로 드러났다. 연구결과에 대한 논의를 통해 게임 과몰입에 있어서 또래집단이 가지는 의미와 중요성 및 연구의 한계점을 정리하여 제시하였다.

• Journal of Information Processing Systems
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• 제16권3호
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• pp.699-717
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• 2020

Propagation time on permissionless blockchain plays a significant role in terms of stability and performance in the decentralized systems. A large number of activities are disseminated to the whole nodes in the decentralized peer-to-peer network, thus causing propagation delay. The stability of the system is our concern in the first place. The propagation delay opens up opportunities for attackers to apply their protocol. Either by accelerating or decelerating the propagation time directly without proper calculation, it brings numerous negative impacts to the entire blockchain system. In this paper, we thoroughly review and elaborate on several parameters related to the propagation time in such a system. We describe our findings in terms of data communication, transaction propagation, and the possibility of an interference attack that caused an extra propagation time. Furthermore, we present the influence of block size, consensus, and blockchain scalability, including the relation of parameters. In the last session, we remark several points associated with the propagation time and use cases to avoid dilemmas in the light of the experiments and literary works.