• Journal for History of Mathematics
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• v.24 no.2
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• pp.31-46
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• 2011

[ ${\ll}$ ]n divisions of figures(${\pi}{\varepsilon}{\rho}{\acute{\iota}}\;{\delta}{\iota}{\alpha}{\iota}{\rho}{\acute{\varepsilon}}{\sigma}{\varepsilon}{\omega}{\nu}\;{\beta}{\iota}{\beta}{\lambda}{\acute{\iota}}o{\nu}$)${\gg}$ is one of the works written by Euclid, but little known to us. In this paper, we introduce this Euclid's book on divisions of figures with its brief history, analyse its contents, and discuss how to use it in mathematics education.

• Proceedings of the Korea Contents Association Conference
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• 2017.05a
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• pp.345-346
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• 2017

종이책은 출판의 오랜 역사적, 기술적 과정을 통해 고유한 사용자 인터페이스를 형성해왔다. 전자책은 1970년대 이후 디지털 출판 방식에 의해 출현하고 최근 HTML5 기반의 이퍼브(EPUB)3.0 형식이 확산되었다. 전자책은 전통적 종이책 편집의 사용자 인터페이스 요소들을 상당부분 지니고 있으면서도 많은 부분을 포함하지 못하고 있다. 본 연구는 기술와 미디어 변화에 따라 '사용자가 인터페이스를 통해 상호작용을 하면서 가지게 되는 전체적인 느낌과 경험이 변화된다는 관점에서 종이책과 전자책의 인터페이스를 비교 분석한다. 이 작업을 통하여 공통점과 차이점이 지니는 의미를 분석하고, 전통적 출판의 편집요소가 어떻게 전자책 편집 수준을 높이고 전자책을 통해 더 진화된 인터페이스와 사용자 체험을 제공할 수 있게 활용될 수 있는지를 연구한다.

• The Mathematical Education
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• v.38 no.1
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• pp.1-14
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• 1999

It has already been fifty years since the Korean peninsula was divided into two nations, South and North Korea. Owing to forming different political and social structures with each other, we can conjecture that there are much heterogeneity in education. On the assumption that education plays important role in coming to an accommodation and in restoring homogeneity of the Korean race after unification, we consider the investigation of the contents of mathematics text-book of secondary schools as a meaningful research to make provision against unification. In this paper, we shall investigate the learning contents, and the teaming substances and sequences in mathematics of secondary schools between South and North Korea by falling into four regions; algebra and statistics, analysis and geometry. By grasping the special features of terms, teaming subject matters and learning substances, and clarifying their distinctions, we shall present some reforms measure of distinctions.

• Journal of the Korean Society for Library and Information Science
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• v.36 no.3
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• pp.275-286
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• 2002

This paper estimates the relative efficiency of 29 university libraries in Seoul by data envelopment analysis. We employed library space, staff and book collection as inputs, and book circulation and reader visits as outputs. The result shows that average efficiency score is 0.5248 and only 3 libraries are efficient. Inefficiency is estimated to be 47.52%. Reorganization may be necessary in order to achieve greater efficiency.

• Journal for History of Mathematics
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• v.28 no.6
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• pp.311-320
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• 2015

In 1613 the official-scholar LI Zhi-zao (李之藻) of the Ming Dynasty, in collaboration with the Italian Jesuit Matteo RICCI (利瑪竇), compiled the treatise Tongwen Suanzhi (同文算指). This is the first book which transmitted into China in a systematic and comprehensive way the art of written calculation that had been in common practice in Europe since the sixteenth century. This paper tries to see what pedagogical lessons can be gleaned from the book, in particular on the basic operations in arithmetic and related applications in various types of problems which form the content of modern day mathematics in elementary school education.

• Journal of Ubiquitous Convergence Technology
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• v.2 no.1
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• pp.12-17
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• 2008

In this paper, the 128bit AES block cipher algorithm OCB (Offset Code Book) mode for privacy and authenticity of high speed packet data was efficiently designed in C language level and was optimized to support the required capacity of contents server using high performance DSP. It is known that OCB mode is about two times faster than CBC-MAC mode. As an experimental result, the encryption / decryption speed of the implemented block cipher was 308Mbps, 311 Mbps respectively at 1GHz clock speed, which is 50% faster than a general design with 3.5% more memory usage.

• Journal of Information Management
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• v.32 no.1
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• pp.71-86
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• 2001

The advancement of Internet and information technology allows people to access information and knowledge resources without the limit of time and place. Recent the development of various readers and wireless communication technologies has made It possible to facilitate the widespread use of electronic books. This paper is describes the definitions, features and advantages of e-books, and examines researches of technologies standards, and digital rights managements related to e-books in Korea and other countries. It also observes a future growth in the production and utilization of e-books in libraries.

• East Asian Economic Review
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• v.19 no.3
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• pp.223-241
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• 2015

This paper examines the existence of value premium in the Chinese stock markets and empirically provides its explanation. Our results suggest that the value premium does exist in the Chinese markets, and investor sophistication is significant in explaining its existence. In particular, there is supporting evidence that the value premium could be driven by individual investors, whereas stocks that are mostly held by institutional investors are value-premium free. We briefly discuss the implications of our findings.

• The Korean Journal of Applied Statistics
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• v.11 no.2
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• pp.389-401
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• 1998

This paper introduces CybeRClass(Cyber Regression Class). CybeRClass uses the technique of animation arid voice to teach regression analysis. The structure of this system make it possible to extend to multivariate analysis methods such as discriminant analysis and cluster analysis. Tools for multimedia is Multimedia ToolBook, and Xlisp-Stat is used for statistical computation and statistical graphics.

• Journal for History of Mathematics
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• v.15 no.2
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• pp.101-112
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• 2002

Gu-Jang-San-Sul is a book of Chinese ancient mathematics and has had an impact on Korean mathematics. The book is organized into nine chapters and each chapter is composed of problems, answers, and their computation algorithms. The contents reflect the practicality of Chinese mathematics. Especially the first chapter covers the computation of fractions for land surveying. This paper suggests how the computation methodology is used in teaching fractions for primary school students. Five strategies for fractions related to the reduction, addition, subtraction, multiplication, and division are followed by: 1) developing the ability to apply rules to problems by practicing the computation process according to the given algorithm; 2) developing the communication skill by comparing the differences of various computation algorithms; 3) setting computation problems; 4) understanding the characteristics of terminology in mathematics; and 5) being exposed to new ideas in mathematics.