• Kyungpook Mathematical Journal
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• 제47권1호
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• pp.81-89
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• 2007

In this paper, we introduce the concept of a system of asymptotically quasinonexpansive type mappings. Furthermore, we define a $k$-step iterative sequence approximating common fixed point for a system of asymptotically quasi-nonexpansive type mappings and study its stability in real Banach spaces.

• 한국수학사학회지
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• 제30권3호
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• pp.137-162
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• 2017

The Chinese algebraic method, the tian yuan shu, was developed during Song period (960-1279), of which Li Ye's works contain the earliest testimony. Two 18th century editors commentated on his works: the editor of the Siku quanshu and Li Rui, the latter responding to the former. Korean scholar Nam Byeong-gil added another response in 1855. Differences can be found in the way these commentators considered mathematical objects and procedures. The conflicting nature of these commentaries shows that the same object, the quadratic equation, can beget different interpretations, either a procedure or an assertion of equality. Textual elements in this paper help modern readers reconstruct different authors' understandings and reconsider the evolution of the definition of the object we now call 'equation'.

• 한국학교수학회논문집
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• 제18권3호
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• pp.311-334
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• 2015

본 연구는 글로벌 초등수학교육 콘텐츠를 구성하기 위한 노력의 일환으로 한국, 중국, 일본, 미국의 수학과 교육과정을 비교 분석한 것이다. 본 논문에서는 도형 영역을 중심으로 4개 국가의 수학과 교육과정에서 다루는 내용을 비교 분석하여 공통점과 차이점을 면밀하게 도출하였다. 이를 토대로 도형 영역과 관련하여 우리나라 수학과 교육과정 개발에 제공하는 시사점을 기술하였다.

• East Asian mathematical journal
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• 제28권5호
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• pp.617-630
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• 2012

In this paper, the problem of iterative approximation of common fixed points of asymptotically nonexpansive is investigated in the framework of Banach spaces. Weak convergence theorems are established. A necessary and sufficient condition for strong convergence is also discussed. As an application of main results, a variational inequality is investigated.

• Journal of applied mathematics & informatics
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• 제36권5_6호
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• pp.491-504
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• 2018

In this article, we consider a fourth order nonlinear difference system. By making use of the critical point theory, we obtain some new existence theorems of at least one periodic solution with minimal period. Our main approach used in this article is the variational technique and the Saddle Point Theorem.

• 한국수학교육학회지시리즈D:수학교육연구
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• 제17권1호
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• pp.29-46
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• 2013

Introduction: According the 2011 Taiwanese Government Statistics, the lower secondary school enrollment number of the new-immigrant-children is about 200,000. As known, most of the new immigrants are from the Southeast Asian countries, such as Vietnam, China, Indonesia, Thailand, the Philippines and Cambodia. In order to satisfy the increasing needs and demands on education of the children of new immigrant (CNI, henceforth), Taiwanese government not only develops, but also puts the after-school learning assistance policy into practice from 2006. Therefore, the main purpose of this study is to explore the mathematics achievement of the CNI after the implementation of the after-school learning assistance policy (AsLA policy, henceforth). Purposes: Firstly, to compare the mathematics achievement of the CNI by countries. Secondly, to compare the mathematics performance among the CNI, the children from high-risk family (CHRF, henceforth) and the children of general families. Samples: The 2,452 samples, selected from two junior high schools located in central Taiwan, include 157 CNI, 522 CHRF. Methods: The main method used in this study is interval fuzzy number (IFN, henceforth) in order to compare the mathematics achievement of the children after the implementation of the AsLA policy from different type of families. Results: To reach the two purposes of this study. We can find the effectiveness of mathematics performance from three group's children of new immigrants, high-risk, general family. Therefore, the results provide one of the ways to review the new immigrant's education policy of after-school learning assistance in Taiwan.

• 한국초등수학교육학회지
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• 제15권3호
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• pp.599-617
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• 2011

본 연구의 목적은 2009 개정 수학 교육과정에 따른 교과서 작업에 즈음하여 중국 교과서와 우리나라 교과서를 비교 분석함으로써 현재 교과서의 개선점을 지적하고 새 교과서 작업에 시사점을 주고자 한다. 분석 대상은 중국 인민교육출판사의 초등수학 교과서와 2007 개정 교육과정에 따른 우리나라 교과서이다. 분석 영역은 수와 덧셈, 뺄셈으로 제한했다. 본 연구의 결과는 한국 교과서가 상대적으로 많은 언어적 표현의 사용, 할 일이 정해진 활동, 수학적 개념의 확장에서 유사한 절차 사용, 수와 연산 영역에서 더 큰 수의 사용, 다양하지 못한 수 감각 활동으로 나타났다. 이에 우리나라 교과서가 수학적 흥미와 도전감, 기초기본 개념 형성에서 상대적으로 취약하다는 것을 말해준다.

• 한국수학교육학회지시리즈A:수학교육
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• 제43권4호
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• pp.349-379
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• 2004

In Korea, the new system of college entrance examination is established and it will be conducted from the year 2005. There are many worries for the mathematics examination of the new system in the society of mathematics in Korea. In this study, we compare the characteristics of the mathematics examination for the college entrance examination of Korea to those of China, Japan, France, England and German. From this comparison, we point out some predictable problems of the new system of Korea and suggest some complemental methods.

• East Asian mathematical journal
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• 제32권4호
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• pp.443-464
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• 2016

The purpose of ths study is to compare and analyze the sequence of teaching multiplication facts in the elementary school mathematics. Generally, the multiplication in the elementary school mathematics is composed of the followings; concepts of multiplication, situations involving multiplication, didactical models for multiplication, and multiplication strategies for teaching multiplication facts. This study is focusing to multiplication facts, especially to the sequence of teaching and multiplication strategies. The method of this study is a comparative and analytic method. In order to compare textbooks, we select the Korean elementary mathematics textbooks(1st curriculum~2009 revised curriculum) and the 9 foreign elementary mathematics textbooks(Japan, China, Germany, Finland, Hongkong etc.). As results of comparative investigation, the sequence of teaching multiplication facts is reconsidered on a basis of elementary students' mathematical thinking. And the connectivity of multiplication facts is strengthened in comparison with the foreign elementary mathematics textbooks. Finally multiplication strategies for teaching multiplication facts are discussed for more understanding and reasoning the principles of multiplication facts in the elementary school mathematics.

• 한국지능시스템학회:학술대회논문집
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• 한국퍼지및지능시스템학회 1993년도 Fifth International Fuzzy Systems Association World Congress 93
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• pp.915-916
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• 1993

In this paper, the fuzzy ISODATA algorithm is applied to forecasting liquefaction of sand in the antiseismic structures. According to the data of the earthquake taken place in Tang Shan in 1976, we construct a model of mathematics, on which we forecast 32 samples in the earthquake of Tang Shan. The correct rate of forecast is 90.7 %.