• 대한화학회지
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• 제57권1호
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• pp.115-126
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• 2013

이 연구에서는 과학 탐구의 본성에 대한 명시적-반성적 탐구 학습 프로그램을 개발하고 적용하여 그 효과를 과학 탐구의 본성을 직접 가르치지 않은 암시적 탐구 수업과 비교하였다. 또한, 개발된 프로그램 및 암시적 탐구 수업에 대한 학생들의 인식을 비교하였다. 중학교 2학년 학생들을 두 집단에 배치하였다. 처치 집단에서는 과학 탐구의 본성에 대한 명시적-반성적 탐구 학습 프로그램을 실시하였고, 통제 집단에서는 과학 탐구의 본성과 관련된 내용을 제외하고 처치 집단과 동일한 탐구 활동을 사용한 수업을 실시하였다. 연구 결과, 처치 집단의 수업이 학생들의 과학 탐구에 대한 인식론적 견해를 향상시키는데 효과적이었다. 그러나 두 집단의 과학 성취도와 과학 수업에 대한 즐거움에는 통계적으로 유의미한 차이가 없었다. 처치 집단의 학생들은 과학 탐구의 본성에 대한 소집단 토론 활동을 수업의 장점으로 생각하였으며, 소집단 토론 활동이나 과학 탐구의 본성에 대한 이해, 자신의 생각을 글로 쓰고 발표하는 활동 등을 어려움으로 인식하는 것으로 나타났다. 이에 대한 교육학적 함의를 논의하였다.

• Educational Technology International
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• 제9권2호
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• pp.79-95
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• 2008

This paper aims to investigate modeling scripts based on the mode of group interaction in a computer-supported collaborative learning environment. Based on a literature review, this paper assumes that group interaction and its mode would have strong influence on the online collaborative learning process, and furthermore lead learners to create and share significant knowledge within a group. This paper deals with two different modes of group interaction- distributed and shared interaction. Distributed interaction depends on the external representation of individual knowledge, while shared interaction is concerned with sharing knowledge in group action. In order to facilitate these group interactions, this paper emphasizes the utilization of appropriate CSCL scripts, and then proposes the conceptual framework of CSCL scripts which integrate the existing scripts such as implicit, explicit, internal and external scripts. By means of the model regarding CSCL scripts based on the mode of group interaction, the implications for research on the design of CSCL scripts are explored.

• 대한수학회보
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• 제50권3호
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• pp.929-934
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• 2013

In this short note we discuss degrees of twisted Alexander polynomials and demonstrate an explicit example of a closed 3-manifold which is related to the degree formula due to Friedl, Kim and Kitayama.

• Journal of applied mathematics & informatics
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• 제20권1_2호
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• pp.171-180
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• 2006

Two infinite classes of special finite groups considered (The group G is special, if G' and Z(G) coincide). Using certain sequences of numbers we give explicit formulas for the Fibonacci lenghts of these classes which involve the well-known Wall numbers k(n).

• 한국전산유체공학회:학술대회논문집
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• 한국전산유체공학회 2006년도 PARALLEL CFD 2006
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• pp.243-246
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• 2006

• 대한수학회보
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• 제60권6호
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• pp.1497-1522
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• 2023

In this paper we compute the Bredon homology of wallpaper groups with respect to the family of finite groups and with coefficients in the complex representation ring. We provide explicit bases of the homology groups in terms of irreducible characters of the stabilizers.

• 대한수학회논문집
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• 제35권2호
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• pp.481-486
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• 2020

Let K be a number field. Here we give an explicit description of the group (O_K/I)* for most ideals I. In particular, we give a complete characterization of such group for those ideals I that are coprime to the different ideal 𝒟_K.

• ETRI Journal
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• 제23권4호
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• pp.202-204
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• 2001

In this letter, we propose a new multicast scheme, named Xcast+, which is an extension of Explicit Multicast (Xcast) for an efficient delivery of multicast packets. The mechanism incorporates the host group model and a new control plane into existing Xcast, and not only does it provide the transparency of traditional multicast schemes to senders and receivers, but it also enhances the routing efficiency in networks. Since intermediate routers do not have to maintain any multicast states, it results in a more efficient and scalable mechanism to deliver multicast packets. Our simulation results show distinct performance improvements of our approach compared to Xcast, particularly as the number of receivers in a subnet increases.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2004년도 추계학술대회
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• pp.79-84
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• 2004

Strain energy due to the mechanical interaction between self-accommodation groups of martensitic phase transformation is called interaction energy. Evaluation of the interaction energy should be accurate since the energy appears in constitutive models for predicting the mechanical behavior of shape memory alloy. In this paper, the interaction energy is evaluated in terms of theoretical formulation and explicit finite element calculation. A simple example with two habit plane variants was considered. It was shown that the theoretical formulation assuming elastic interaction between the self-accommodation group and matrix gives larger interaction energy than explicit finite element calculation in which transformation softening is accounted for.

• 대한수학회지
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• 제42권2호
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• pp.203-222
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• 2005

Thompson series is a Hauptmodul for a genus zero group which lies between $\Gamma$o(N) and its normalizer in PSL2(R) ([1]). We construct explicit ring class fields over an imaginary quadratic field K from the Thompson series $T_g$($\alpha$) (Theorem 4), which would be an extension of [3], Theorem 3.7.5 (2) by using the Shimura theory and the standard results of complex multiplication. Also we construct various class fields over K, over a CM-field K (${\zeta}N + {\zeta}_N^{-1}$), and over a field K (${\zeta}N$). Furthermore, we find an explicit formula for the conjugates of Tg ($\alpha$) to calculate its minimal polynomial where $\alpha$ (${\in}{\eta}$) is the quotient of a basis of an integral ideal in K.