• Communications of Mathematical Education
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• v.32 no.4
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• pp.495-517
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• 2018

This paper is based on the effects of Zone of Proximal Development and scaffolding theory of social constructivist, Russian psychologist Vygotsky. He insisted that a social interaction play a fundamental role in the development of cognition. This study is to examine the efficient of the scaffolding types in Math class. The ZPD is the distance between a student's ability to perform a task under adult guidances or with peer collaboration and the student's ability solving the problem independently. To conduct the research was grouped into an experimental first grader five students in H high school in Y county. After class, students were questioned through Semi-structured interviews. The results of this study are below. First, Students were satisfied with the class mixed micro-scaffolding types and Macro-scaffolding types and improved their math thinking ability and the ways of solving problems. Second, The results of the class showed that students' ability to perform a task was transferred to the higher level through the help of a teacher or peers. Students could have more time to listen to peers' opinions and to say their own thoughts freely than they were under the lecture method instruction. Third, Students were interested in math through the experimental class. That's because the appropriate help of the scaffolding type, a cooperate study, relative with real life, using an engineering tools. They made a change of perception.

• Korean Journal of Child Studies
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• v.36 no.4
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• pp.143-161
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• 2015

This study aims to examine the relationship between mothers' attachment levels, types of verbal control, and infants' language development. The selected participants comprised 224 infants, aged 24-35 months and their mothers (224) at 25 long day care centers located Goyang-si, Gimpo-si in Gyeonggi-do, Incheon and Seoul. The major findings of this study were as follows. First, there were significant differences in mothers' attachment levels, types of verbal control, and infants' language development depending on the mothers' employment status. Secondly, to assess the relative influences of two variables which were significantly associated with infants' language development, the sociodemographic variables of mothers and infants, including infants' age and mothers' employment status, were controlled in order to conduct hierarchical regression analysis. The results revealed that imperative-oriented verbal controls, person-oriented verbal controls, and contact seeking all influenced infants' overall language development.

• Proceedings of the Korea Society of Poultry Science Conference
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• 2002.11a
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• pp.133-135
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• 2002

This study was designed to investigate the effects of dietary isoflavones(IF) on bone ash content in young chicks. Daidzein(DE) and genistein(GE), aglycone forms of IF, were added to purified-type basal diet containing calcium at 50% of NRC requirement. The two IF at two different levels(1.0 and 2.0 mM) were added to the diets prepared to be very low in IF using soy protein concentrate(SPC) as the only source of protein. The diets Including control with no IF-added were fed for three weeks. One hundred, Hy-Line Brown, day-old male chicks were divided into five dietary groups with four replicates and five chicks per replication. General performances of the chicks were not affected by the dietary treatments. Serum alkaline phosphatase(ALP) activities, an indicator for bone formation, of the birds fed DE diet were lowered compared to those fed GE and control diets. However, the levels of IF did not show any differences in the responses. Bone ash o/o of birds fed the IF diets were significantly increased compared to that of control group (p〈0.05), and, however, not affected by levels of IF in diets. Bone breaking strength measured with an Instron appeared to be equivalent among the birds of all treatments. The observations that equivalences in bone ash o/o and bone breaking strength even with lowered activity of ALP by DE ingestion compared to GE suggest a necessity of further investigation.

• Journal of Korean Elementary Science Education
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• v.22 no.1
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• pp.1-14
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• 2003

This study investigated the effects of the cognitive acceleration program devised for accelerating the development of formal reasoning ability of students. ‘Thinking Science’ activities developed by the Cognitive Acceleration through Science Education(CASE) project were implemented to 420 students in 5th grade aged 10+ in four elementary schools over a period of two yea. Homogeneity between the experimental group and control group was tested with SRT II, and the improvement of formal reasoning ability of the students was tested with SRT III. The results were analyzed by treatment, gender, and cognitive levels of the students. Statistically significant gains were shown in the CASE group compared with those in the control group. Cognitive level of girls in the CASE group increased as compared with the control group, while there was moderate effect in boys for the primary school. These results implied that the thinking science activities were effective in cognitive acceleration of girls aged 10+. It was shown that much more CASE students in concrete operational level shifted to formal operational level as compared with the control group while there were no significant effects in the other levels for primary school.

• School Mathematics
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• v.11 no.4
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• pp.745-771
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• 2009

To acquire the hints of the development of children's multiplication strategies, this study tried to find the differences between the students who learned multiplication and the students who didn't. And we also tried to explore their acquired computational resources. As a result, we confirm that there is a certain direction on the development of children's multiplication strategies according to their grades and the level of acquirement of mathematical knowledge. Moreover, we comprehend that commutative law is an important part of the strategies on two-digit multiplication and that acquisition of the computational resources must precede the learning of multiplication strategies. In the end part, this article proposes a new taxonomy of strategies for multiplication. To support our proposal, we integrated the prior researches with our findings.

• Proceedings of the KAIS Fall Conference
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• 2011.05b
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• pp.724-727
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• 2011

본 연구에서는 2010년 교육과학기술부 국가 수준 교육과정에 기초하여 연구 개발한 유아교육 자료 "유아의 창의 인성 함양을 위한 영상매체 활용프로그램"을 활용하여 영상매체가 유아의 창의성 발달에 어떠한 영향을 미치는지 살펴보았다. 창의성의 하위요인으로는 유창성, 융통성, 독창성, 상상력으로 나누어 살펴보았다.

• Communications of Mathematical Education
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• v.12
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• pp.185-200
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• 2001

증명은 수학에서 기초적이고도 중요한 주제이다. 추측을 만들어내고 자신에게는 물론 타인에게까지 그 추측을 정리로서 확신시키는 활동은 수학활동에서의 핵심이라고 할 수 있다. 그러나 현재의 증명 학습지도에서는 학생들의 수준보다는 높은 증명 발달단계를 제시하고 있다는 보고와 함께 기존의 지도방법의 개선책을 요구하고 있다. 따라서 본고에서는 몇 가지 증명의 발달 단계를 정리해 보고 Balacheff의 증명 4단계를 토대로 하여 증명활동을 점진적인 구성으로 제시한다.

• Review of Korea Contents Association
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• v.2 no.1
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• pp.50-62
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• 2004

국제적인 규모의 많은 행사, 그리고 전반적인 생활수준의 향상으로 인해 외국을 방문하는 관광객의 수는 비약적으로 늘어났다. 또한 전 세계적인 네트 인프라의 발달로 인해 해외여행 중 어디에서나 인터넷을 쉽게 접할 수 있게 되었다. 그러나, 발달된 컴퓨팅 환경 속에서도 각 나라 별로 쉽게 문서를 작성하는 데는 아직 많은 어려움이 존재한다. 자국어를 포함한 한 두개의 외국어를 이용하여 콘텐츠를 작성하는 것은 어느 정도 가능하다 할지라도 그 숫자가 두세개 이상인 경우는 콘텐츠 작성에 많은 어려움이 존재한다.(중략)한다.(중략)

• Broadcasting and Media Magazine
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• v.27 no.4
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• pp.59-65
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• 2022

최근 미디어 발달은 융합된 형태로 구성되고 있으며, 실감 혹은 사실감에 입각한 체험의 양질의 성장이 필요한 시대를 영위하고 있다. 공간을 기반으로 다양한 랜드마크로 미디어의 장르를 표현하고 있으며, 실감미디어는 무한 확장의 개념에서 발달하고 있다. XR(eXtended Reality)의 성장에 따른 융합된 H/W와 S/W를 기반으로 대규모 공간과 다중체험 그리고 수준 높은 그래픽 퀄리티를 요구하고 있으며, 이에 기반한 국내 최초 공간기반 XR 콘텐츠 국립광주박물관의 신한선의 여정의 제작 과정을 소개한다.

• Electric Engineers Magazine
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• v.190 no.6
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• pp.50-54
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• 1998

에너지자원이 없는 우리나라는 과거부터 전기소비절약이 강조되어 왔으나 생활수준이 크게 향상된 오늘날 이러한 내핍위주 형태의 소비절약은 한계가 있고 문화의 발달로 쾌적하고 편리한 생활을 위한 전력수요가 지속적으로 증가되고 있는 실정이다.