• 한국수학교육학회지시리즈E:수학교육논문집
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• 제35권3호
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• pp.233-255
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• 2021

본 연구의 목적은 수학불안을 줄이기 위한 프로그램의 계획·실행을 위한 중학생용 수학불안 검사 도구의 개발과 타당화에 있다. 본 연구에서는 중학생용 수학불안 검사 도구 개발 및 타당화 과정을 설명하고, 구인타당도를 검증하기 위한 탐색적 요인분석과 확인적 요인분석 과정을 자세하게 기술하였다. 연구 결과로 수학교과, 수학태도, 수학시험, 환경 등 4개 요인 30문항으로 이루어진 중학생용 수학불안 검사 도구 MASS-M이 개발되었다. MASS-M은 중학생의 수학불안 요인으로서 '수학시험' 요인, '환경' 요인, 특히 수학적 처치를 설명하는 '수학교과' 요인과 심리적 처치를 설명하는 '수학태도' 요인을 포함한다. 본 연구에서 도출한 MASS-M은 중학생의 수학불안을 측정하기 위해 타당화한 검사 도구로써, 중학생의 수학불안 관련 연구에 일관성을 유지하고 더 나아가 중학생의 수학불안을 처치하기 위한 프로그램 개발의 토대가 되기를 기대한다.

• 대한수학교육학회지:학교수학
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• 제13권1호
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• pp.127-153
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• 2011

수학학습에서의 개인차의 문제를 해결하는 현실적인 방법 중 하나가 교실에서 이뤄지는 또래교수이다. 일반적으로 또래교수는 기본학습과정을 먼저 끝낸 학습우수아가 기본학습과정을 이수하는데 어려움이 있는 학습부진아를 도와주는 방식으로 이뤄진다. 따라서 대부분의 또래학습에 관한 연구가 또래교사보다는 또래학습자의 학습에 초점을 맞춰왔고 이런 이유로 부진아 지도를 위한 방법 중 하나로 연구되어졌다. 그러나 또래교수가 학습 부진아에게 효과적인 방법이라고 할지라도 또래교사에게는 스스로 학습할 수 있는 기회를 제한할 뿐 아무런 이득이 되지 않는다면 효율적인 교수학적 방법이라고 보기 어렵고 윤리적이지도 못하다. 본 연구는 또래교수가 또래교사에게 어떤 영향을 미치는 지를 알아보는 것이 목적이다. 이를 위해서 또래교수가 이뤄지기 전과 후의 또래교사의 수학적 성향과 수학적 의사소통 능력의 변화를 살펴보았다.

• 한국수학교육학회지시리즈D:수학교육연구
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• 제13권2호
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• pp.109-122
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• 2009

This study investigates the change in two theoretical constructs, attitudes toward mathematics and mathematics self-efficacy, among college students involved in a learning community model. The case of this study was a developmental mathematics class offered at a historically black college located in the southeastern United States. Subjects included 31 students enrolled in an introductory mathematics course, some of whom participated in a learning community (treatment group). The participants completed mathematics attitudes and mathematics efficacy instruments twice: at the beginning of the semester and again at the end. Data was analyzed using descriptive statistics and a non-parametric statistic. The results showed that students' attitudes toward mathematics and mathematics self-efficacy are strongly correlated; the mathematical problem-solving efficacy changed significantly over time and it is significantly higher in the treatment group than in the control group; and the treatment group produced better outcomes. These findings indicate that a learning community model can increase students' mathematics self-efficacy beliefs. It is recommended that mathematics self-efficacy and attitudes toward mathematics be measured over an extended period of time when a learning community is implemented.

• 대한수학회지
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• 제32권1호
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• pp.115-139
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• 1995

Our purpose in this paper is to prove a new version of the nonlinear Chernoff theorem and to discuss the equivalence between resolvent consistency and converge nce for nonlinear algorithms acting on different Banach spaces. Such results are useful in the numerical treatment of partial differential equations via difference schemes.

• 한국물환경학회지
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• 제40권4호
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• pp.179-194
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• 2024

Biophysicochemical processes in water environments and treatment systems have been great concerns of engineers and scientists for controlling the fate and transport of contaminants. These processes are practically formulated as mathematical models written in coupled differential equations. However, because these process-based mathematical models consist of a large number of model parameters, they are complicated in analytical or numerical computation. Users need to perform substantial trials and errors to achieve the best-fit simulation to measurements, relying on arbitrary selection of fitting parameters. Therefore, this study adopted a Bayesian calibration method to estimate best-fit model parameters in a systematic way and evaluated the applicability of the calibration method to biophysicochemical processes of water environments and treatment systems. The Bayesian calibration method was applied to the microbial growth-decay kinetics and flocculation kinetics, of which experimental data were obtained with batch kinetic experiments. The Bayesian calibration method was proven to be a reasonable, effective way for best-fit parameter estimation, demonstrating not only high-quality fitness, but also sensitivity of each parameter and correlation between different parameters. This state-of-the-art method will eventually help scientists and engineers to use complex process-based mathematical models consisting of various biophysicochemical processes.

• East Asian mathematical journal
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• 제39권1호
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• pp.65-73
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• 2023

In this paper, we present an optimal control strategy to prevent the EMT process by downregulating the level of overexpressed β-catenin in the cytoplasm. To do this, we propose a mathematical model that expresses relationship between the Wnt signaling pathway and TGF-β in cancer cells. We also define an optimal control problem considering the side effects that occur simultaneously with the method for controlling the concentration of β-catenin. Finally numerical simulations show that treatment effect is quantitatively changes depending on the concentration of core proteins of the Wnt signaling pathway.

• East Asian mathematical journal
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• 제38권3호
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• pp.357-363
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• 2022

Immunological imbalance eventually results in the development of various diseases. A typical example is an imbalance of cytokines with immunomodulatory abilities. In this paper, we propose a two-variable delay model to anti-pro-inflammatory cytokine therapy for autoimmune diseases, which are caused by an imbalance between the pro and anti-inflammatory cytokines. The interaction between pro- and anti-inflammatory cytokines were modeled mathematically to investigate the relevance of cytokines in disease processes. The delay time was estimated to maintain the stability of a biologically important steady state. In particular, the effects of delay with anti-pro-inflammatory cytokines therapy in autoinflammatory diseases were studied.

• 한국초등수학교육학회지
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• 제16권1호
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• pp.97-124
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• 2012

이 연구는 아동문학을 활용하여 수학 수업을 운영하는 것이 학생들의 수학적 의사소통과 수학적 태도에 어떠한 영향을 미치는지 알아보는 것을 목적으로 한다. 연구를 실행하기 위해 초등학교 6학년 학생들을 대상으로 수학 6-나 단계 교과 내용을 재구성하여 아동문학을 활용한 세 가지 유형의 수업방식을 10주간 20회에 걸쳐 현장에 적용하였으며, 그 효과를 수학적 의사소통 능력 측면과 수학적 태도 측면에서 분석하였다. 수학적 의사소통 능력에 대한 효과를 알아보기 위해 사전, 사후 개방형 문항 검사를 실시하여 t-test로 검증하였으며, 수학적 태도에 대한 영향을 알아보기 위해 사전, 사후 설문검사를 실시하여 t-test와 공변량분석으로 결과를 각각 검증하였다. 또한 학습 상황에서 일어나는 의사소통 과정 및 수학적 태도의 양상을 관찰하기 위해, 아동문학을 활용한 수업 과정을 캠코더로 촬영하여 그 중 각 유형별 수업을 임의로 선택하여 프로코콜 분석을 실시하였으며, 또한 학생들의 활동 모습을 관찰하고 인터뷰한 내용을 분석하였다. 본 연구 결과 아동문학을 수학 수업에 적용하면, 교과서 중심의 일반적인 수학 수업을 진행했을 때보다 학생들의 수학적 의사소통 능력과 수학적 태도에 긍정적인 영향을 미치는 것으로 나타났다.

• 대한수학회논문집
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• 제12권2호
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• pp.427-456
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• 1997

This paper concerns constructing wavelet bases on the unit interval, where a new boundary treatment is provided to overcome certain drawbacks of eariler constructions. Wavelet expansions on the unit interval usually suffer from artificial boundary effects and poor convergence at the boundaries. Many researchers have suggested a solution to the drawbacks. From a practical point of view, their solutions also have a common disadvantage. This paper provides a new solution using biorthogonality near the boundaries, that avoids the disadvantage while preserving their advantages.

• 한국수학교육학회지시리즈D:수학교육연구
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• 제4권1호
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• pp.1-22
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• 2000

The purpose of this study was to investigate the effects of using graphing calculators on students' understanding of the linear and quadratic function concepts. The populators of this study are tenth graders at high school in Seoul, one class for the treatment group and another class for the comparison group, and experiment period is 14 weeks including two weeks for school regular exams.Function tests used in the study was proposed which described a conceptual knowledge of functions in terms of the following components: a) Conceptual understanding, b) Interpreting a function in terms of a verbal experission, c) Translating between different representations of functions, and d) Mathematical modeling a real-world situation using functions. Even though the group test means of the individual components of conceptual understanding, interpreting, translating, mathematical modeling did not differ significantly, there is evidence that the two groups differed in their performance on conceptual understanding. It was shown that students learned algebra using graphing calculators view graphs more globally. The attitude survey assessed students' attitudes and perceptions about the value of mathematics, the usefulness of graphs in mathematics, mathematical confidence, mathematics anxiety, and their feelings about calculators. The overall t-test was not statistically significant, but the students in the treatment group showed significantly different levels of anxiety toward mathematics.