• 한국산학기술학회논문지
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• 제4권4호
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• pp.409-417
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• 2003

본 논문에서는 세계적인 추세에 있는 전력산업의 규제완화와 지구규모적인 환경문제, 전기의존도의 증가, 수용가의 다양한 요구 등 배전계통을 둘러싼 환경변화에 대응할 수 있는 차세대 전기에너지공급시스템의(FRIENDS)의 기본개념과 운용모델을 제안하여, 기존계통에의 도입적용에 대한 구체적인 실현형태를 제시한다. 특히, 배전계통의 목표관리로 수행되고 있는 수용가전압의 전압관리 측면에서 FRIENDS의 운용모델과 기존의 전압관리 운용방안을 비교ㆍ평가하는 수법을 제시하여, FRIENDS의 운용효과를 정량적으로 평가한다. 여기서, 차세대 배전계통은 유연하게 계통구성을 변화시킬 수 있고, 수용가에 멀티메뉴 서비스를 제공할 수 있으며, 각종 설비의 고효율운전을 가능하게 하는 고유연ㆍ고신뢰ㆍ고효율 전기에너지유통시스템을 말한다.

• 가정과삶의질연구
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• 제18권1호
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• pp.153-166
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• 2000

The relations between friendships peer aggression and victimization by peers were examined with a sample of 426 second-grade junior high school students(210 boys and 216 girls) Data were collected using questionnaires regarding friendship(number of friends and presence of a best friend) peer aggression and victimization by peers. The number of friends was significantly related to peer aggression both in boys and girls indicating that the more friends they had the less peer aggression they showed. Peer aggression didn't vary as a function of the presence of a best friend. The number of friends was also significantly related to victimization both in boys and girls. The more friends they had the less victimization they experienced. Victimization varied as a function of the presence of a best friend only in adolescent boys in which those having a best friend were rated by peers to experience less victimization, Victimization was related to peer aggression both in boys and girls. T e more victimization they experienced the more peer aggression they showed.

• 아동학회지
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• 제18권2호
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• pp.47-56
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• 1997

This study investigated the agreement between 3 assessments of preschoolers' friendship: peer nominations, teacher nominations, and behavioral observations. The relationship between friendship, social status, social competence, and play behaviors was also investigated. The subjects were 44 5-year-olds. Teachers were asked to rate the children's social competence; play behaviors were observed during free play time. The results indicated high agreement between the 3 assessments. Popular children were more likely to have friends than other social status groups. Children without friends were more hesitant than children with friends. Children with friends were more accepted by peers and engaged in cooperative social play more than children without friends.

• 아동학회지
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• 제25권6호
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• pp.35-52
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• 2004

The purpose of this study is to explore the relation among mother's rearing attitude in infancy, children's self-concept and the relationship with friends in childhood by using the longitudinal data originated by the Korean Institute for Research in the Behavioral Sciences(KIRBS). Specifically, using Structural Equation Modeling(SEM), the causal relation among the mother's rearing attitude in infancy, children's self-concept and the relationship with friends in childhood were examined across a 8-year-period. The subjects were 68 children(38 boys and 30 girls) from the KIRBS longitudinal data. The results showed that mother's rearing attitude in infancy can be consequential environmental variable factor, and children's self-concept do not play an essential intermediate role between mother's rearing attitude in infancy and the relationship with friends in childhood. This study used a newly attempted method in the field of Human Development.

• 아동학회지
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• 제14권1호
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• pp.109-127
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• 1993

This study examined compensatory patterns of support among three types of children's peer relationships: school friendships, nonschool friendships, and sibling relationships. Specifically, this study investigated (1) the degree to which children with unsupportive school friendships turn to nonschool friends and siblings to compensate for the provisions they lack from school friends, and (2) the potential protective effects of substitute support on such children's adjustment. Subjects for this study were drawn from a sample of 297 sixth graders attending 3 public schools in Seoul. 6 teachers and 594 of parents of subjects also participated in the study. Subjects completed their questionnaires in their own classroom. The teachers and parents completed their forms within 1 week. The data were analyzed by two-way ANOVA and $Scheff{\acute{e}}$ test. The results of this study were as follows: (a) When compared with the average, aggressive children and isolated children perceived their school friendship as low support. (b) Isolated, aggressive, and average children differed in their perceptions of support from nonschool friends and their favorite siblings. (c) The children who have unsupportive school friendships experienced greater socioemotional difficulties than did children with supportive school friendships. (d) The extent that sibling and nonschool friends provided the support lacking in their school friendships, isolated and aggressive children experienced diminished emotional distress.

• 한국생활과학회지
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• 제14권6호
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• pp.947-959
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• 2005

This study examined (1) whether romantic partners' or close friends' acceptance-rejection perceived by college students is related to their psychological adjustment indicated by hostility/aggression, dependency, negative self-esteem, negative self-competence, emotional unresponsiveness, emotional instability, and negative world view; (2) whether parents' behavioral control in childhood and romantic partners' or close friends' behavioral control perceived by college students are related to their psychological adjustment; (3) how parents' behavioral control and acceptance-rejection in childhood perceived by college students are related with each other; and (4) how romantic partners' or close friends' behavioral control and acceptance-rejection perceived by college students are related with each other. The subjects were 163 college students enrolled in universities located in Seoul or Kyungki-do in Korea. The results indicated that college students' perceptions of their romantic partners' or close friends' acceptance-rejection are related to their psychological adjustment, that college students' perceptions of their parents' behavioral control and romantic partners' or close friends' behavioral control are related to their psychological adjustment, and that college students' perceptions of parents' behavioral control are related to their perceptions of parents' hostility/aggression, indifference, and rejection and the results were the same for the romantic partners' or close friends' behavioral control and acceptance-rejection.

• 가족자원경영과 정책
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• 제10권4호
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• pp.87-107
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• 2006

A study of 117 Korean immigrant women who had husband and(or) children in Hawaii found the relation between social networks and psychological well-being. Social networks composed supporters, support structure, and support contents. Psychological well-being examined family life satisfaction, family life stability, and women's psychological health. Results showed as followed. First, the choice of immigration place among Korean immigrant women and her family based on other family members and friends lived in there. Second, her supporters were family and relatives, Korean friends, foreign friends, religions, belonged organizations and groups, public agencies in Hawaii, and mass-media. The best supporters of them was family and relatives and they mostly provided mental health to Korean immigrant women. Family, Korean friends, foreign friends, and religions tended to support emotional assistance. Third, the level of psychological well-being was higher. Her level of psychological health was higher than the others. Fourth, the best predictors of psychological well-being were child existence, occupation, and immigration duration. Fifth, psychological well-being significantly distinguished different relations of supporters from support structure of social network. The number and support duration with foreign friends supporter and the support duration and the level of perceived useful support content highly related with psychological well-being.

• 한국생활과학회지
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• 제12권5호
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• pp.713-735
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• 2003

The purpose of this study was to investigate the effects of the characteristics of maternal social networks on maternal expectation for their own children to examine the path that social networks had an effect on the self-esteem and the emotional intelligence of children through maternal expectation for their own children. The data used in this study were collected from 524 fourth to sixth graders and their mothers residing in Daejeon using structured questionnaire. The major findings of the study were as follows : (1) Among social network characteristics, proportion of friends and neighbors, proximity, direction and interference had a negative effect, and proportion of mothers of child's friends, frequency of contact, intimacy, emotional support, service support had a positive effect on maternal expectation for their own children. (2) Among social network characteristics, proportion of mothers of child's friends had a direct effect and proportion of friends, neighbors, and mothers of child's friends, proximity, frequency of contact, intimacy, direction, emotional support, service support, and interference had an indirect effect on children's emotional intelligence through maternal expectation for their own children. (3) Among social network characteristics, proportion of kin and mothers of child's friends, intimacy, service support, material support and interference had a direct effect, and proportion of neighbors and mothers of child's friends, proximity, frequency of contact, direction, service support had an indirect effect on children's emotional intelligence through maternal expectation for their own children.

• 한국콘텐츠학회논문지
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• 제20권2호
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• pp.265-276
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• 2020

본 연구는 국내에서 출판된 그림책 중 상상친구를 주제로 한 총 30권의 그림책을 대상으로 상상친구 그림책의 출판 경향과 상상친구의 외적인 특성에 대해 연구하였다. 연구결과 첫째, 상상친구 그림책의 원전 출판 국가는 서구권의 나라가 대부분이었으며, 동양권에서는 한국과 일본에서 일부만 출판되었다. 분석된 책의 다수가 픽션 그림책이었으며, 상상친구와 관련된 책이 2000년 이후로 꾸준히 출판되고 있었다. 둘째, 그림책에서나타난 상상친구의 외적 특성은 주인공 및 상상친구의 성별, 주인공과 상상친구의 이름, 상상친구의 현시 여부, 상상친구의 유형, 상상친구의 수로 분석하여 결과를 나타내었다. 그림책에 나타난 상상친구를 가진 주인공은 여성의 비중이 남성보다 높았으며, 주인공의 이름과 함께 상상친구의 이름을 구체적으로 제시하고 있는 경우가 많았다. 분석된 그림책에서 상상친구가 주인공에게는 구체적 형태로 나타나고 있으나 주인공외 타인에게 보이지 않는 경우가 대부분이었다. 상상친구의 유형은 동물, 사람, 기타 순으로 나타났으며 주인공이 1명의 상상친구를 가진 경우가 많았다.

• 한국수소및신에너지학회논문집
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• 제34권6호
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• pp.581-586
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• 2023

As the development of alternative energy is required due to the depletion of fossil fuels, interest in the use of hydrogen energy is increasing. Hydrogen is a promising clean energy source with high energy density and can lead to the application of environmentally friendly technologies. However, due to difficulties in production, storage, and transportation that prevent the application of hydrogen-based eco-friendly technology, research on reforming reactions using dimethyl ether (DME) is being conducted. Unlike other hydrocarbons, DME is attracting attention as a hydrogen carrier because it has excellent storage stability and transportability, and there is no C-C bond in the molecule. The reaction between DME and steam is one of the reforming processes with the highest hydrogen yield in theory at a temperature lower than that of other hydrocarbons. In this study, a hydrogen reforming device using DME was developed and a catalyst prepared by supporting Cu in alumina was put into a reactor to find optimal hydrogen production conditions for supplying hydrogen to fuel cells while changing reaction temperature (300-500℃), pressure (5-10 bar), and steam/carbon ratio (3:1 to 5:1).