• 충청수학회지
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• 제37권2호
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• pp.67-74
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• 2024

Maximal surfaces have a prominent place in the field of differential geometry, captivating researchers with their intriguing properties. Bearing a direct analogy to the minimal surfaces in Euclidean space, investigating both their similarities and differences has long been an important issue. This paper is aimed to give a local characterization of maximal surfaces in 𝕃³ in terms of their geodesic curvatures, which is analogous to the minimal surface case presented in [8]. We present a classification of the maximal surfaces under some simple condition on the geodesic curvatures of the parameter curves in the line of curvature coordinates.

• 한국지능정보시스템학회:학술대회논문집
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• 한국지능정보시스템학회 2001년도 The Pacific Aisan Confrence On Intelligent Systems 2001
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• pp.410-420
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• 2001

A primitive conceptualization is defined as the set of all intended situations. A non-primitive conceptualization is defined as the set of all the pairs every of which consists of an intended knowledge system and the set of all the situations admitted by the knowledge system. The reality of a domain is considered as the set of all the situation which have ever taken place in the past, are taking place now and will take place in the future. A conceptualization is defined as precise if the set of intended situations is equal to the domain reality. The representation of various elements of a domain ontology in a model of the ontology is considered. These elements are terms for situation description and situations themselves, terms for knowledge description and knowledge systems themselves, mathematical terms and constructions, auxiliary terms and ontological agreements. It has been shown that any ontology representing a conceptualization has to be non-primitive if either (1) a conceptualization contains intended situations of different structures, or (2) a conceptualization contains concepts designated by terms for knowledge description, or (3) a conceptualization contains concept classes and determines properties of the concepts belonging to these classes, but the concepts themselves are introduced by domain knowledge, or (4) some restrictions on meanings of terms for situation description in a conceptualization depend on the meaning of terms for knowledge description.

• 한국수학교육학회지시리즈A:수학교육
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• 제23권2호
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• pp.5-11
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• 1985

There arc numerous techniques available to appraise pupil achievement in elementary school mathematics. The teacher must utilize a variety of approaches to assess pupil growth in the mathematics curriculum. Each evaluation technique has its strengths as well as weaknesses. Thus, a specific evaluation technique may be utilized as a check on other approaches to appraisal. Pupil achievement must be assessed in terms of stated relevant understandings. skills, and attitudinal objectives. It is not adequate to appraise pupil growth in terms of understandings objectives only. Pupils must also be assessed in terms of skills objectives. The understandings acquired by learners must be utilized; thus, skills objectives need to be stressed adequately in ongoing units of study in elementary school mathematics. Adequate emphasis also needs to be placed upon pupils achieving attitudinal goals. Desireable attitudes on the part of learners aid in achieving understandings and skills objectives. A defensible program of evaluation would then stress that pupil achievement be adequately appraised in terms of understandings, skills, and attitudinal objectives.

• 한국수학교육학회지시리즈E:수학교육논문집
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• 제36권3호
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• pp.335-353
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• 2022

본 연구의 목적은 수학 문장제 해결에 기초가 되는 수학과 용어의 유형에 따른 한국어학습자의 이해 특성 및 오류유형을 파악하여 한국어학습자의 문장제 해결에 효과적인 교수·학습 지도 방안 마련을 위한 기초 자료를 제공하는 것이다. 이를 위해 학교에서 별도의 한국어 수업을 듣는 한국어학습자 4명을 대상으로 교육과정 등재 용어와 교과서에 사용된 교육과정 미등재(정의/무정의) 용어에 대한 구체적인 개념이미지를 분석하는 사례 연구를 하였다. 연구 결과 첫째, 한국어학습자가 수학과 용어에 대하여 적합한 개념정의를 정립할 수 있도록 충분한 시각화 자료를 활용하여 지도할 필요가 있다. 둘째, 한국어학습자의 가정 내 사용 언어와 수학과 용어에 대한 적합한 개념이미지 형성 사이의 구체적인 관계를 파악할 필요가 있다. 셋째, 능동형 용어보다 의미 이해에 어려움을 겪고 있는 피동형 용어에 주의하여 지도할 필요가 있다. 넷째, 일상의 의사소통에 어려움이 없는 한국어학습자의 경우에도 수학 교과서에 사용되는 교육과정 미등재 일상어에 대하여 지도할 필요가 있다. 다섯째, 용어에 대한 설명에서 나타난 한국어학습자의 언어적 특성이 반영된 오류 유형을 고려하여 수학과 용어를 지도해야 할 것이다. 이러한 인식은 언어적 배경이 다른 한국어학습자의 문장제 해결 지도에 도움이 될 것으로 기대된다.

• East Asian mathematical journal
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• 제36권2호
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• pp.173-201
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• 2020

Mathematical modeling has been emphasized because it offers important opportunities for students to both apply their learning of mathematics to a situation and to explore the mathematics involved in the context of the situation. However, unlike its importance, mathematical modeling has not been grounded in typical mathematics classes because teachers do not have enough understanding of mathematical modeling and they are skeptical to implement it in their lessons. The current study analyzed the data, such as video recordings, slides, and surveys for teachers, collected in four lessons of teacher education in terms of mathematical modeling. The study reported different kinds of tasks that are authentic with regards to mathematical modeling. Furthermore, in teacher education, teachers' identities have separated a mode as learners and a mode as teachers and conflicts and intentional transition were observed. Analysis of the surveys shows what teachers think about mathematical modeling with their understanding of it. In teacher education, teachers achieved different kinds of modeling tasks and experience them which are helpful to enact mathematical modeling in their lessons. However, teacher education also needs to specifically offer what to do and how to do it for their lessons.

• 한국수학교육학회지시리즈A:수학교육
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• 제52권1호
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• pp.111-128
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• 2013

The purpose of this study was to examine and analyze the cognitive demand of the mathematical tasks suggested in the middle school textbooks. In particular, it aimed to reveal the overall picture of the level of cognitive demand of the mathematical tasks in the strand of geometry in the textbooks. We adopted the framework for mathematical task analysis suggested by Stein & Smith(1998) and analyzed the mathematical tasks accordingly. The findings from the analysis showed that 95 percent of the mathematical tasks were at high level and the rest at low level in terms of cognitive demand. Most of the mathematical tasks in the textbooks were algorithmic and focused on producing correct answers by using procedures. In particular, the high level tasks were presented at the end of each chapter or unit for wrap up rather than as key resources.

• 한국수학교육학회지시리즈D:수학교육연구
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• 제19권4호
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• pp.195-209
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• 2015

The current study investigated meaning of Jigsaw model application in teaching and learning mathematics based on the literature research and analysis of Jigsaw models. Through related literature, properties of the tasks of the expert sheets in mathematics are examined. Then the advantages of the application of Jigsaw in mathematics are discussed in terms of the realizing mathematical connections and promoting positive affective outcomes of Korean students in mathematics.

• 대한수학회지
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• 제55권1호
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• pp.131-146
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• 2018

We generate ring class fields of imaginary quadratic fields in terms of the special values of certain eta-quotients, which are related to the relative norms of Siegel-Ramachandra invariants. These give us minimal polynomials with relatively small coefficients from which we are able to solve certain quadratic Diophantine equations concerning non-convenient numbers.

• 대한수학회보
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• 제50권4호
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• pp.1277-1288
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• 2013

Wulan and Zhu [16] have characterized the weighted Bergman space in the setting of the unit ball of $C^n$ in terms of Lipschitz type conditions in three different metrics. In this paper, we study characterizations of the harmonic Bergman space on the upper half-space in $R^n$. Furthermore, we extend harmonic analogues in the setting of the unit ball to the full range 0 < p < ${\infty}$. In addition, we provide the application of characterizations to showing the boundedness of a mapping defined by a difference quotient of harmonic function.

• 대한수학교육학회지:수학교육학연구
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• 제14권3호
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• pp.283-304
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• 2004

본 논문은 1년 동안 학생중심 수학교실문화를 구현하려고 노력하는 3명의 초등학교 교사들을 대상으로 6개의 수학교실문화를 분석함으로써 교사중심에서 학생중심의 문화로 바꿔나가는 과정을 상세하게 탐색한다. 연구대상 교실 모두에서 일반적인 사회적 규범과 관련하여 학생중심 교수법의 전형적인 양상이 구현된 반면에, 사회수학적 규범과 수학적 관행 측면에서는 학생들의 아이디어가 수학적 담화와 활동의 중심이 되는 정도에 따라서 유사성보다는 차이점이 부각되었다. 이러한 연구 결과를 바탕으로 수학교실문화 개선의 난제, 사회수학적 규범과 수학적 관행의 중요성, 교사의 역할 등에 관해 논의한다.