• Journal of the Korean BIBLIA Society for library and Information Science
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• v.25 no.1
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• pp.173-191
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• 2014

The purpose of this study is to analyze and identify the characteristics in the current library classification research, and to provide suggestions for the future in this area. This study covers the published studies in library classification from 2004 to 2013. They include the research on Korean Decimal Classification (KDC), Dewey Decimal Classification and others. The results show that the main purpose in those studies is to improve current KDC system. A suggestion is provided in this study to concentrate on specific classification systems for school libraries and small libraries, for digital collections.

• Journal for History of Mathematics
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• v.22 no.1
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• pp.41-52
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• 2009

Dutch mathematician Simon Stevin published De Thiende(The Tenth) in 1583. In that book Stevin suggested new numerical notation which could express all numbers. That new notation was decimal fraction system. In this article I will argue that Stevin invented new decimal fraction system with two main purposes. The explicit purpose was to invent a new system which could be used easily by practical mathematicians. The implicit purpose which cannot be found in De Thiende alone but in his other writings was to break the Aristotelian tradition which separated geometry and arithmetic which dealt continuous magnitude and discrete numbers respectively.

• School Mathematics
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• v.4 no.4
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• pp.643-655
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• 2002

In this paper we emphasize the introduction of ‘incommensurability’ on the teaching and learning the irrational number because we think of the origin of number as ‘ratio’. According to Greek classification of continuity as a ‘never ending’ divisibility, discrete number and continuous magnitude belong to another classes. That is, those components were dealt with respectively in category of arithmetic and that of geometry. But the comparison between magnitudes in terms of their ratios took the opportunity to relate ratios of magnitudes with numerical ratios. And at last Stevin coped with discrete and continuous quantity at the same time, using his instrumental decimal notation. We pay attention to the fact that Stevin constructed his number conception in reflecting the practice of measurement : He substituted ‘subdivision of units’ for ‘divisibility of quantities’. Number was the result of such a reflective abstraction. In other words, number was invented by regulation of measurement. Therefore, we suggest decimal representation from the point of measurement, considering the foregoing historical development of number. From the perspective that the conception of real number originated from measurement of ‘continuum’ and infinite decimals played a significant role in the ‘representation’ of measurement, decimal expression of real number should be introduced through contexts of measurement instead of being introduced as a result of algorithm.

• Journal of the Korean Society for Library and Information Science
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• v.5
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• pp.152-178
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• 1978

This has been designed for an attempt to survey a library use competency in order to provide basic information to plan more effective library use instruction for high school students. To get necessary data, a questionnaire was sent to 450 students in the 7 sample high schools in Seoul, and $80\%$ of them responded. The followings are the analysed results. 1. $42\%$ of them responded that they have heard about the decimal classification and $15\%$ of all the students have ever used decimal classification to search for the materials. 2. $3.6\%$ responded that they can understand the decimal classification and $66\%$ of all the students want to know about decimal classification. 3. $94\%$ responded that they have heard about the catalog cards and $41\%$ of all the students used catalog cards to search for the materials. 4. $29\%$ responded that they can understand the catalog cards and $68\%$ of all the students want to know about the catalog cards. 5. $61\%$ responded that they can use reference books. 6. $55.6\%$ responded that they know about the parts of a book. 7. $11\%$ responded that they can footnote. Reviewing the results of this study, library use competency of high school students can be said to be below level. And more effective approach is expected.

• Journal of Elementary Mathematics Education in Korea
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• v.23 no.1
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• pp.1-17
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• 2019

In this study, prospective teachers were involved in arranging the teaching sequence of multiplication and division of fractions and decimal numbers based on their experience and knowledge of school mathematics. As a result, these activities provided an opportunity to demonstrate the prospective teachers' perception. Prospective teachers were able to learn the knowledge they needed by identifying the differences between their perceptions and curriculum. In other words, prospective teachers were able to understand the mathematical relationships inherent in the teaching sequence of multiplication and division of fractions and decimal numbers and the importance and difficulty of identifying students' prior knowledge and the effects of productive failures as teaching methods.

• Journal of the Korean Society for Library and Information Science
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• v.42 no.4
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• pp.291-310
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• 2008

The U.S. Library of Congress proposal to change the subject heading of Tok Island(in Korea called Dokdo) to Liancourt Rocks was controversial. Therefore the status of Dokdo, national notation(Dokdo or Tokdo), and international notation used to identify the island were examined. In this examination, Tok Island's classification in the Korea Decimal Classification(KDC), Library of Congress Classification(LCC), and Nippon Decimal Classification(NDC) were compared and analysed, and a proposal for the role of libraries in the future was given.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.19 no.2
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• pp.129-146
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• 2008

Notes in library classification systems are inevitable tools for creating and building of classification numbers. The purposes of this study are to make better notes in Korean Decimal Classification(KDC) by analyzing and comparing notes in other library classification system and to assign the most appropriate classification numbers based upon the better notes. In order to achieve these purposes, analyzing notes in Dewey Decimal Classification(DDC) and KDC was carried. And the comparison of notes used in 000 Computer science, information, general works in DDC and KDC was done. Based upon these analysis, additional notes and their various forms were suggested.

• Journal of Educational Research in Mathematics
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• v.26 no.2
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• pp.159-172
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• 2016

This study examines the approach of introduction of the real numbers through the infinite decimal, which is suggested by Lee Ji-Hyun(2014; 2015) in the aspect of the overcoming the double discontinuity, and analyses Li(2011), which is the mathematical background of the foregoing Lee's. Also, this study compares these construction methods given by Lee and Li with the traditional method using the nested intervals. As a result of analysis, this study shows that Lee Ji-Hyun(2014; 2015) and Li(2011) face the risk of the circulation logic in making the infinite decimal corresponding each point on the geometrical line, and need the steps not using the 'limit to a real number' in order to compensate the mathematical and educational defect. Accordingly, this study raises the opinion that the traditional method of defining the infinite decimal as a sequence by using the geometrical nested intervals axiom would be a appropriate supplementation.

• Journal of the Korean Society for Library and Information Science
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• v.46 no.3
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• pp.181-201
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• 2012

This study aims to analyze and compare the structures of auxiliary tables regarding places - for example, Korea using several decimal classification systems such as DDC, UDC, KDC and NDC. For each auxiliary table, the codes were described in detail and the special characteristics were discussed. The common characteristics and the different aspects of different decimal classification systems were investigated as well as divisions of Korea in Korean Wikipedia and an administrative district classification system. This study suggests a new basic summary for the expansion of codes of Korea in auxiliary table in DDC with its principles and options and it will be useful for revising process of many decimal classification systems.

• Journal of Educational Research in Mathematics
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• v.21 no.2
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• pp.121-134
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• 2011

Stevin is known as the inventor of decimal fractions, even though many mathematicians had the concept of decimal fractions and used it before Stevin. Why? To respond to such a question, we studied about its significance which 'La Disme' had in the history of mathematics. These can be summarized as its notational aspect, the manner of developing the book, the conceptual revolution and the practical purpose. And the chapter and verse of are little known when compared to its reputation. So in this paper we considered its contents in detail and discussed some didactical implications in relation to teaching and learning of decimal fractions in elementary school : importance of place values, similarity of calculation to natural numbers, using common fractions to justify, emphasis on the applications of decimal fractions, relation to measuring units, necessity of teaching number sense, using notational aspects.