• Journal of Educational Research in Mathematics
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• v.21 no.2
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• pp.149-163
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• 2011

While the affective aspects are emphasized in the current mathematics curriculum in Korea, it is just indicated a superficial degree. Therefore in this study, based on consideration for internal representational system theories, a dynamic viewpoints of self-system processes, socio-constructivist perspectives, and motivation theories, we discuss the meaning of affective competency, the motive of mathematics learning, mathematical identity of students, social environments and affective experiences, then we suggest an affective frame in mathematical learning. Hereby, we suggest what should be considered in affect instructions and the alternative goal of mathematical education in affective aspects.

• The Mathematical Education
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• v.50 no.1
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• pp.13-25
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• 2011

The Goals of mathematics education for the lower grades of primary school is to shape the basic concepts and the skills of mathematics. To achieve this goal, it is necessary an assessment which is able to help the students' learning activities by precisely diagnosing their basic mathematical capability. It should lend the students an assistance in diagnosing and revising their problems throughout teacher's cognitive participation in the process of mathematical problem solving. I would like to suggest the dynamic assessment as one of these kinds of approaches. In order to prove the utilities of this way, it was examined the necessity of dynamic assessment on the basis of the Vygotsky's theory after looking into the characteristics of the contents and methods of the mathematics education for the lower grades of primary school. Next, I researched the principles of the dynamic assessment and embodied the assessment tool to evaluate the mathematical achievement of the lower grades of the primary school. Lastly, it was provided the examples of the dynamic assessment tool in order to assist the practice of it.

• Journal of the Korean School Mathematics Society
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• v.11 no.3
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• pp.513-541
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• 2008

The purposes of the study were to investigate whether the use of the Geometer's Sketchpad(GSP) is more effective than the use of traditional tools such as ruler and protractor to enhance eighth- grade students' understanding of quadrilaterals and geometric reasoning ability and to examine how the use of the software affects on the development of students' understanding and reasoning ability. According to the results of the posttest, there was a significant difference in student achievement between students using GSP and students using ruler and protractor. Students using GSP significantly outperformed students using ruler and protractor on the posttest. Student interview data showed that the use of the GSP was more effective in developing students' geometric reasoning ability. Students using GSP achieved higher degrees of acquisition for van Hiele level 2 and 3 than students using ruler and protractor. Dynamic visual representations and hands-on experiences provided in GSP learning environment helped students approach quadrilateral concepts more conceptually and realize their pre-existing conceptual errors and re-conceptualize their mathematical ideas.

• Journal of Environmental Policy
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• v.12 no.3
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• pp.73-96
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• 2013

This aim is to explore the change of lifestyle caused by climate change and develop available adaptation policies against climate threats in Central Asia with the perspective of nomadism, which depends entirely on natural ecosystem. This article also attempts to pinpoint the dynamics between nomadic lifestyle and adaptation options for the resilience of nomadic community against climatic change threats. The adaptation options and opportunities as well as the impacts of land use change and nomadic pastoralists' lifestyle caused by climate change cannot be overemphasized. We suggest that nomadic lifestyle may aggravate the degree of vulnerability to climate change threats, whereas the capacity of nomad to successfully adapting to new environment in developing countries can be superior to that of settler lifestyle in one place in developed countries.

• Journal of the Korean Home Economics Association
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• v.27 no.3
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• pp.173-182
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• 1989

이 연구의 목적은 전통적으로 남성 주도적인 전문직 진출을 희망하는 여대생(이 연구에서는 법률가 및 의사직, 이하 비 전통적인 여성이라 부름)과 전통적으로 여성 주도적인 전문직 진출을 준비중인 여대생 (이 연구에서는 교사 및 간호사직, 이하 전통적으로 여성 이라 부름)을 구분 할수 있는 개인의 성격 및 가족환경의 특성을 검토하는 것이었다. 남성 주도적인 전문직에 진출을 준비하거나 그 분야에 종사하는 여성들의 특성에 대한 연구가 많이 발표되었으나 그 특징들의 중요성이 상대적으로 얼마나 비중이 있는지는 연구되어 있지 않다. 발단론적 환경이론(Developmental-Contextualism)과 직업 발달에 대한 역동적 상호관계 모델(Dynamic Interaction Model)이 본 연구의 이론적 체계를 이루고 있다. 이 연구에 포함성의 위치, 심리적 남성특성, 출신가정의 사회경제수준, 그리고 부모의 뒷받침과 이해였다. ANOVA 결과에 의하면 비전통적인 여성들이 자아존중감, 학교성적 성취도, 내적 통제성, 심리적 남성특성, 그리고 출신가정의 사회경제수준 면에서 전통적인 여성에 비해 훨씬 높은 수준을 나타내었다. 단계적 분별 분석 (Stepwise Discriminant Analysis) 결과에 따르면, 심리적 남성 특성, 내적 통제성, 학교성적 성취도, 그리고 출신가정의 사회경제수준이 위 두집단의 여성들을 분별하는 가장 뛰어난 특성들이었으며 전체 표본의 76.99%가 이 요인들에 의해 정확하게 분류되었다. 이 연구의 결과를 토대로 볼 때, 역동적 상호관계모델은 여성의 직업발달을 연구하는데 있어서 이론정립과 검사에 유효한 도구로 보이며, 이 연구에 포함한 변수들은 비 전통적인 여성들의 특성을 정확하게 묘사하는데 상당한 공헌을 하고 있었다. 마지막으로, 비전통적인 여성들의 직업발달을 연구하는데 있어서 "능력특성군(Competency-related traits)"의 변수들을 좀 더 정확하게 분류할 필요가 있으며, 이 변수들과 여성의 직업발달의 관계를 자세히 연구할 필요가 있다고 본다.요가 있다고 본다.

• School Mathematics
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• v.13 no.1
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• pp.19-36
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• 2011

This study provides middle school students with an opportunity to construct elementary functions with dynamic geometry based on the proportion between lengths of triangle to activate students' intuition in handling elementary algebraic functions and their geometric properties. In addition, this study emphasizes the process of justification about the choice of students' construction method to improve students' deductive reasoning ability. As a result of the pilot lesson study, this paper shows the characteristics of the students' construction process of elementary functions and the roles the teacher plays in the process.

• Proceedings of the Korea Information Processing Society Conference
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• 2008.11a
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• pp.1154-1157
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• 2008

오늘날은 실용성 있는 생활 영어교육이 절실히 필요한 시대로서 영어 교육은 무엇보다도 의사소통 능력 개발에 중점을 두고 있다. 영어 학습을 시작하는 초기 학습자 단계에서 가장 우선적으로 직면하게 되는 것이 바로 어휘 학습이다. 기존 영어 단어 학습 시스템은 학습자에게 지나치게 많은 단어들을 단순한 방법을 통해서 학습하게 함으로써 심리적 부담을 주고 있다. 심리언어학에서는 언어 이해의 과정이 단순히 제시된 것을 그대로 받아들이는 수용의 과정이 아니라 학습자가 이미 보유한 경험과 개념을 근거로 활성망의 확산을 통해 적절한 관계를 찾는 역동적·능동적 과정이라는 이론이 있다. 본 논문에서는 언어 학습 이론을 바탕으로 단어들 사이의 관계를 부각시킴으로써 추론과 기억에 도움을 주는 영어 단어 학습 시스템을 제안한다. 본 시스템은 단어들 간의 관계를 정의한 단어 관계 망을 중심으로 단어 학습 순서를 결정할 수 있고, 이미지 및 게임 기능을 지원하여 단어학습의 흥미를 유발하는 특징이 있다. 본 학습시스템을 실제 단어 학습에 적용해 본 결과 학습자들의 만족도가 높았다.

• Journal of Educational Research in Mathematics
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• v.14 no.3
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• pp.327-345
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• 2004

This study attempts to discuss holistic information in order to identify the characteristics of interactions using a graphing calculator. The use of a graphing calculator was divided into three stages: Visual, Analytical, and Self-regulated. The last stage can be called the Self-regulated instrument stage, because this last stage, the use of the calculator, is generally characterized as students actively controlling their ongoing efforts through self-regulating. The accomplishments of the operation can be divided into three levels: Immature, Maturing, and finally, Mature level. First, the characteristics of the Leading Statements were investigated to figure out who has the main role in cooperative learning. This study can support the previous study, which showed that computers could help improve the self-esteem of low-level students. Second, the point of transformation is referred to as the Turning Point. Several functions were observed in the Turning Point: student, instrument, and teacher. Third, when the students convert-sations reach a lull in class and then resume due to certain primary factors without the teachers intervention, this is a case of what is referred to as Structuralization. And last, in this study, the graphing calculator can be used as an auxiliary stimulus to help students control their stress and their attitudes, which in turn can also improve students social interaction.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2015.07a
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• pp.326-327
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• 2015

본 논문에서는 화재의 움직임 정보에 기반하여 역동적인 화재를 감지하는 기법을 제안한다. 우선 감시 카메라와 같은 고정형 감시 장치로부터 얻어진 색 정보를 분리하기 쉬운 좌표계로 변환하고 이전에 수집된 데이터들로부터 얻어진 사전 정보로부터 화염 영역을 추출한다. 또한 화염 영역의 가장자리가 움직임이 매우 크다는 사실에 기반하여 광흐름 벡터로 얻어진 시간적 분산값을 이용한 움직임 모델을 생성한다. 화염 영역은 움직임 모델과 결합되며 오탐을 걸러내기 위해 충분한 양의 화재 영역이 중첩될 때 최종적으로 화재를 판별한다. 본 논문에서 제안한 방법은 실험 결과에서 우수한 탐지 능력을 보인다.

• Investigative Magnetic Resonance Imaging
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• v.17 no.3
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• pp.192-199
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• 2013

Purpose : To retrospectively evaluate the diagnostic performance of dynamic contrast-enhanced MR imaging (DCE-MRI) in detecting recurrent prostate cancer after HIFU of clinically localized cancer, as compared with T2-weighted imaging (T2WI). Materials and Methods: Twenty-six patients with increased prostate-specific antigen levels after HIFU were included in this study. All MR examinations were performed using T2WI and DCE-MRI, followed by transrectal ultrasound-guided biopsy. MRI and biopsy results were correlated in six prostate sectors. Residual or recurrent cancer after HIFU was defined as local tumor progression if biopsy results showed any cancer foci. Two independent readers interpreted the MR images. Results: Of 156 prostate sectors, 51 (33%) were positive for cancer in 17 patients. For detecting local tumor progression, the sensitivity of DCE-MRI and T2WI was 80% and 57% for reader 1 (P < 0.001) versus 84% and 61% for reader 2 (P < 0.001), respectively. The specificity and overall accuracy between DCE-MRI and T2WI showed no statistical difference in both readers (P > 0.05). Interobserver agreement of DCE-MRI and T2WI was moderate and fair, respectively. Conclusion: For detecting local tumor progression of prostate cancer after HIFU, DCE-MRI was more sensitive than T2WI, with less interobserver variability.