• The Pure and Applied Mathematics
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• v.30 no.3
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• pp.237-248
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• 2023

The aim of this paper is to study the concept of s-topological d-algebras which is a d-algebra supplied with a certain type of topology that makes the binary operation defined on it d-topologically continuous. This concept is a generalization of the concept of topological d-algebra. We obtain several properties of s-topological d-algebras.

• The Mathematical Education
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• v.52 no.4
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• pp.483-496
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• 2013

In this study, we investigated the structure of the mathematics education scholars' co-authorship relationship in papers registered at the National Research Foundation of Korea by social network analysis. The data were 354 scholars from 257 papers in 4 journals from 2009 to 2013 based on 'the 2009 revised Korean National Curriculum'. For the analysis, Pajek3 and UCINET6.3 were used. The results of this study were as follows: First, each of the mathematics education scholars is connected on average with about 5 paths of intermediate collaborators. Second, Analyses of the first component group found distinguishable scholar groups' characteristics depending on their affiliations, majors, and job statuses. Third, there were scholars having high values in network degree centrality measures despite not having high numbers in published papers. On the contrary, there sere scholars having high numbers in published papers despite not having high values in network analysis. Finally, I suggested the directions for the future research with the limitations of this study.

• Journal of the Korean Mathematical Society
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• v.30 no.2
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• pp.457-464
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• 1993

• The Mathematical Education
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• v.46 no.1 s.116
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• pp.19-31
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• 2007

This study is to explore the ways in which the affective characteristics of Korean middle school students have been developed and the ways in which they have an effect on their mathematics achievements by using TIMSS (the Trends in International Mathematics and Science Study) data of 1995, 1999, and 2003. In addition, this study investigates the differences in affective variables between boys and girls toward mathematics. The result of the study indicates that the affective characteristics of Korean middle school students have changed a little, but that its effect on mathematics achievement increased a lot from 1995 to 2003. This study also shows that the Korean students study mathematics to get a job than to enter a university. However, girls have come to study it harder before going to college and it seems to have an impact on their mathematics scores; this happened in 1999. So we can infer from it that the decreasing in the difference between boys and girls in mathematics achievement may have been influenced by the girls' learning motivation to go to college. Lastly, it should be said that another analysis is needed to find out the reason for the devaluation of the importance of mathematics among the Korean middle school students.

• Communications of Mathematical Education
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• v.19 no.4 s.24
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• pp.769-785
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• 2005

The affirmative feature which web based learning and problem based learning in the self directed learning having on-line and off-line study it amalgamates in connection Blended Learning method and specially in mathematics subject as a service course. We introduce a model of BL lecture of Mathematics and tried to find a new way for the quality improvement of university education.

• Communications of the Korean Mathematical Society
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• v.20 no.3
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• pp.487-503
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• 2005

Some companions of Gruss inequality in 2-inner product spaces and applications for determinantal integral inequalities are given.

• Journal of applied mathematics & informatics
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• v.28 no.1_2
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• pp.523-529
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• 2010

In this paper, we obtain some recurrence relations for the quotient moments of the lower record values from the generalized extereme value(GEV) distribution. We also deduce some recurrence relations for the negative moments from the GEV distribution.

• Bulletin of the Korean Mathematical Society
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• v.38 no.2
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• pp.413-425
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• 2001

We use the branching rules on SU(3) to show that if two Aloff-Wallach spaces $M_{k,l}\;and\;M_{k',l'}$ are isospectral for the Laplacian acting on smooth functions, they are isometric. We also show that 1 is the non-zero smallest eigenvalue among all Aloff-Wallach spaces and compute the multiplicities.

• East Asian mathematical journal
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• v.10 no.2
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• pp.295-297
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• 1994

• Communications of the Korean Mathematical Society
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• v.8 no.2
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• pp.225-231
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• 1993