• Journal of the Korean Mathematical Society
• /
• v.29 no.1
• /
• pp.127-140
• /
• 1992

• Journal of the Korean Mathematical Society
• /
• v.16 no.2
• /
• pp.95-105
• /
• 1980

• Bulletin of the Korean Mathematical Society
• /
• v.13 no.2
• /
• pp.149.2-149.2
• /
• 1976

• Journal of the Korean Mathematical Society
• /
• v.9 no.2
• /
• pp.85-89
• /
• 1972

• East Asian mathematical journal
• /
• v.11 no.1
• /
• pp.27-34
• /
• 1995

• Research in Mathematical Education
• /
• v.17 no.1
• /
• pp.63-78
• /
• 2013

Trigonometric ratios are difficult concepts to teach and learn in middle school. One of the reasons is that the mathematical terms (sine, cosine, tangent) don't convey the idea literally. This paper deals with the understanding of a concept from the learner's standpoint, and searches the orientation of teaching that make students to have full understanding of trigonometric ratios. Such full understanding contains at least five constructs as follows: skill-algorithm, property-proof, use-application, representation-metaphor, history-culture understanding [Usiskin, Z. (2012). What does it mean to understand some mathematics? In: Proceedings of ICME12, COEX, Seoul Korea; July 8-15,2012 (pp. 502-521). Seoul, Korea: ICME-12]. Despite multi-aspects of understanding, especially, the history-culture aspect is not yet a part of the mathematics class on the trigonometric ratios. In this respect this study investigated the effect of history approach on students' understanding when the history approach focused on the mathematical terms is used to teach the concept of trigonometric ratios in Grade 9 mathematics class. As results, the experimental group obtained help in more full understanding on the trigonometric ratios through such teaching than the control group. This implies that the historical derivation of mathematical terms as well as the context of mathematical concepts should be dealt in the math class for the more full understanding of some mathematical concepts.

• Journal of the Korean Operations Research and Management Science Society
• /
• v.23 no.2
• /
• pp.157-185
• /
• 1998

One of the essential issues in model systems is how to represent and manipulate mathematical modeling knowledge. As the bases of integrated modeling environments, current modeling frameworks have limitations: lack of facility to coordinate different users perpectives and lack of mechanism to reuse modeling knowledge. In this paper, multi-facetted modeling approach is proposed as a basis for the development of integrated modeling environment which provides facilities for (1) independent management of modeling knowledge from individual models； (2) object-oriented conceptual blackboard concept； (3) multi-facetted modeling； and (4) declarative representation of mathematical knowledge. The proposed multi-facetted approach is illustrated using multicommodity transportation models.

• East Asian mathematical journal
• /
• v.33 no.2
• /
• pp.123-147
• /
• 2017

This paper discusses and searches for mathematical analysis and efficient algorithm for types of wallpapers. We study some previous classification methods, develop a systematic process, and present some examples of determining types of wallpaper through our algorithm. Through this approach, we expect to introduce a mathematical perspective on relation between real life and mathematics.

• Communications of Mathematical Education
• /
• v.20 no.2 s.26
• /
• pp.271-282
• /
• 2006

Although the mathematical power is considered important in the 7th curriculum, there is not concrete and systematic approach. To implement the mathematical power in the school mathematics, the several suggestions are given including the introduction of educational mathematics.

• The Korean Journal of Physiology and Pharmacology
• /
• v.23 no.5
• /
• pp.305-310
• /
• 2019

The physiomic approach is now widely used in the diagnosis of cardiovascular diseases. There are two possible methods for cardiovascular physiome: the traditional mathematical model and the machine learning (ML) algorithm. ML is used in almost every area of society for various tasks formerly performed by humans. Specifically, various ML techniques in cardiovascular medicine are being developed and improved at unprecedented speed. The benefits of using ML for various tasks is that the inner working mechanism of the system does not need to be known, which can prove convenient in situations where determining the inner workings of the system can be difficult. The computation speed is also often higher than that of the traditional mathematical models. The limitations with ML are that it inherently leads to an approximation, and special care must be taken in cases where a high accuracy is required. Traditional mathematical models are, however, constructed based on underlying laws either proven or assumed. The results from the mathematical models are accurate as long as the model is. Combining the advantages of both the mathematical models and ML would increase both the accuracy and efficiency of the simulation for many problems. In this review, examples of cardiovascular physiome where approaches of mathematical modeling and ML can be combined are introduced.