• 대한가정학회지
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• 제49권1호
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• pp.17-25
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• 2011

This study examined the impact of academic achievement and maternal differential treatment on academic self-concept among adolescent siblings. The sample consisted of 438 students attending middle schools in Seoul (M = 15.2 yrs.), who had a sibling. Data were analyzed using Structural Equation Modeling. Academic achievement compared with a sibling and maternal differential treatment had direct effects on academic self-concept, indicating that children with higher academic achievement scores than their sibling and with perceived maternal differential treatment reported a significantly higher academic self-concept. Also, the relationship between academic achievement as compared with a sibling and academic self-concept was mediated by maternal differential treatment. These findings could be used in educational settings as a basis for improving the academic self-concept of early adolescents.

• 아동학회지
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• 제14권2호
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• pp.35-47
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• 1993

The purpose of this study was to examine children's sociability as a function of sex of child, number and sex of sibling, and birth order. Children's responses were compared with mothers' responses on social participation and interpersonal adjustment. Subjects were 506 4th and 5th grade children and their mothers. Results showed that mothers' perceptions of their child's sociability were different from those of the children. 'Number of sibling' differences between only children and others were found, with onlies being most likely to show lower scores in interpersonal adjustment. Sex differences in sociability were clearly demonstrated by both children and mothers; that is, boy's interpersonal adjustment scores were lower than girls' scores. Two-way ANOVA data revealed that second-born boys and first-born girls were most likely to obtain higher scores. For siblings, elder sisters showed the highest interpersonal adjustment scores, regardless of sex of younger sibling.

• 한국응용곤충학회지
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• 제29권2호
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• pp.132-135
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• 1990

Anopheles quadrimaculatus( Say) 자매종 간의 미토콘드리아 DNA의 제한효소 절단부위변이를 Aedes albopictus의 마토콘드리아 cDNA를 probe로 이용하여 조사하였다. DNA hybridization에 의해 두 속간에는 mtDNA 영기서열의 상당한 상동성이 있음을 알 수 있었다. 개체 모기로부터 분리한 DNA를 제한효소를 사용하여 절단한 결과 자매종간에 다른 양상을 볼 수 있었으며 Hind III에 의한 mtDNA 절편만으로도 자매종들을 동정할 수 있었다.

• 아동학회지
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• 제23권3호
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• pp.139-148
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• 2002

This study examined differences in children's social competence by number, birth order, and sibling relation types. The subjects were 489 three- to five-year old boys and girls enrolled in 4 kindergartens in Seoul and Gyeonggi Province. Instruments were the California Preschool Social Competency Scale and a questionnaire for the home environmental variables. Data were analyzed by ANCOVA, Tukey test and Cronbach ${\alpha}$. The major findings were that siblings' social competence was higher than only children, first-born children's social competence was higher than the later born, and older brother's social competence was higher than younger brothers and sisters.

• 노동경제논집
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• 제32권2호
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• pp.1-25
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• 2009

본 연구는 2006년도 고령화연구패널 자료를 이용하여 자녀 수가 자녀의 교육성과에 미치는 영향을 실증분석한다. OLS 추정 결과, 자녀 수가 증가함에 따라 자녀의 질, 즉 교육수준이 낮아진 것으로 나타났다. 이러한 실증 결과는 자녀의 수와 질의 대체관계 모형에 부합한다. 그러나 자녀 수의 내생성을 통제하기 위해 첫째 자녀의 성별을 도구변수로 이용한 추정 결과에서는 자녀 수의 증가가 자녀의 교육수준에 통계적으로 유의한 영향을 미치지 않는 것으로 나타났다. 이러한 결과는 자녀 1인당 교육투자액의 감소에 따른 교육수준의 저하가 자녀 수 증가로 인한 다른 효과에 의해 상쇄될 수 있음을 보여준다.

• Animal cells and systems
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• 제9권1호
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• pp.13-18
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• 2005

Cannibalism plays important roles at the levels of both individual and population. To enhance overall rate of successful survival and reproduction, salamander larvae may have evolved to consume both conspecifics and heterospecifics. Consuming conspecifics could result in decreased inclusive fitness possibly by killing relatives. In several salamander species, discrimination of salamander larval siblings from non-siblings and heterospecifics to avoid such a risk has been reported. To determine whether the Korean salamander larvae consume non-siblings more often than siblings and to analyze prey preferences of the salamander larvae in several different experimental conditions, a series of foraging experiments was conducted in the laboratory. We found that 1) large cannibal larvae preyed on small sibling more often than small non-sibling in a mixed group of sibling and non-sibling, 2) cannibal larvae prefered to consume live, weak, and small larvae to dead, healthy, and large larvae, and 3) cannibal larvae consumed heterospecific tadpoles more often than conspecific nonsibling larvae in a mixed group. In addition, the larval density was positively correlated with the occurrence of spacing behavior, one of the agonistic predator behaviors among salamander larvae.

• International Journal of Contents
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• 제3권3호
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• pp.6-14
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• 2007

In this paper, we design and implement a XML Repository System(XRS) that exploits the advantages of DBMSs and IRSs. Our scheme uses BRS to support full text indexing and content-based queries efficiently, and ORACLE to store XML documents, multimedia data, DTD and structure information. We design databases to manage XML documents including audio, video, images as well as text. We employ the non-composition model when storing XML documents into ORACLE. We represent structured information as ETID(Element Type Id), SORD(Sibling ORDer) and SSORD(Same Sibling ORDer). ETID is a unique value assigned to each element of DTD. SORD and SSORD represent an order information between sibling nodes and an order information among the sibling nodes with the same element respectively. In order to show superiority of our XRS, we perform various experiments in terms of the document loading time, document extracting time and contents retrieval time. It is shown through experiments that our XRS outperforms the existing XML document management systems. We also show that it supports various types of queries through performance experiments.

• 한국컴퓨터정보학회논문지
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• 제12권5호
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• pp.65-72
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• 2007

동적인 XML 문서에서 빈번히 발생하는 갱신에 대한 고려를 하지 않는 레이블링 기법들은 XML 문서 트리의 갱신이 일어날 때 마다 변화된 레이블 정보를 반영하기 위해서 전체 XML 트리를 재탐색하여 전체 노드의 레이블을 다시 계산하는 리레이블링(relabeling)과정이 필요하다. 이러한 리레이블링은 갱신이 빈번히 일어나는 동적인 XML 문서에서는 비용이 상당히 크다는 단점이 있다. 이런 단점을 해결하기 위해 리레이블링 과정이 필요 없는 레이블링 기법으로 프라임 넘버 레이블링 기법(prime number labeling scheme)이 제안되었다. 그러나 프라임 넘버 레이블링 기법은 문서가 갱신될 때 XML 문서 트리의 노드 간 형제순서(sibling order)를 갱신하는 문제는 고려하지 않고 있다. 이러한 형제순서의 갱신과정은 XML 문서 트리의 많은 부분을 재탐색하고 재기록 하여야 하므로 많은 비용이 필요하게 된다. 따라서 본 논문에서는 XML 문서 트리의 재탐색과 재기록이 필요 없이 형제순서를 유지할 수 있는 형제순서 값을 갖는 프라임 넘버 레이블링 기법을 제안한다.

• 대한통합의학회지
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• 제9권3호
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• pp.1-8
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• 2021

Purpose : There is a lack of research on this field in the Republic of Korea, especially those that have seen the effect of interaction between siblings through sensory integration therapy (SIT). Therefore, this study sought to find out the effectiveness of SIT with siblings through the Revised Knox Preschool Play Scale (RKPPS) and playtime. Methods : The experimental group consisted of 10 disabled children, and 10 normal siblings of the disabilities joined the program as a helper. In addition, 10 children with disabilities conducted the intervention as a control group. The difference between the experimental group and the control group is whether they participate with their sibling or not during the intervention period. The present study was conducted a SIT for 40 minutes per week for the experimental and the control group and then had 10 minutes of an interview with the parents of children with disabilities. A total of 10 programs were implemented for 10 weeks. Results : The experimental group showed statistically significant differences in space management, material management, pretense/symbolic, participation, and total scores. The control group showed significant differences between pre and post results in the participation and the total scores. The experimental group and the control group showed significant differences in the pre-post comparison results. The comparison of post-intervention between both groups of the RKPPS and playtime results showed a statistically significant increase in the experimental group. Conclusion : The sibling SIT showed better play level and time than the individual therapy. However, comparisons before and after the intervention in the level of play showed significant results only in participation and total scores in the control group. Clinically, it is recommended to make good use of sibling relationships when applying SIT, and if that is not possible, continuous observation is needed that children who received treatment become familiar with the environment in which they can be treated.

• Child Studies in Asia-Pacific Contexts
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• 제2권1호
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• pp.11-27
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• 2012

We examined play interactions between siblings when one child has autism in a Vietnamese American and a European American family. Analysis was based on video recorded free play sessions with each set of siblings at their home. Interviews with the typically developing sibling and parents also provided supplemental data to aid our knowledge about their play behavior. This study describes the role of the typically developing sibling in play and the types of play engaged in by siblings. Findings indicate that the two sets of siblings differed in their play behavior. Specifically, significant differences were noted in the role of the typically developing sibling in play, and the types of play engaged in by the siblings. The perceptions of the typically developing siblings and parents regarding autism also differed across families, significantly affecting their play behavior. Implications for research are described.