• Proceedings of the Korean Society of Precision Engineering Conference
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• 2006.10a
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• pp.3-4
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• 2006

• The Mathematical Education
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• v.50 no.1
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• pp.27-40
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• 2011

The purpose of this paper is to analyze and discuss the viewpoint dealing with the fundamental figures-point, line segment, and angle-of elementary school teachers. In fact, our main subjects in this article are as follows; how do elementary school teachers deal with the fundamental figures?, what is the general notion about the fundamental figures of elementary school teachers? Our such subjects come from the survey results about the 'fundamental figures in J. A. Ko(2009); the elementary school students have a tendency to regard the fundamental figures as not mathematical figures. In this article, we discuss mainly the meta-cognitive shift in the transform of notion, for example, from 'congruent' concept to 'equal' concept, about the fundamental figures.

• Proceedings of the Korean Society of Computer Information Conference
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• 2017.07a
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• pp.336-337
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• 2017

본 논문에서는 이처럼 중요한 역할을 하는 무릎의 굽힘(flexion)과 폄(extension)에 대하여 측정을 한다. 무릎과 엉덩이를 펴고 골반을 중립상태로 두고 엎드려 무릎을 구부리고 편다. 일반인의 도수 측정 각도는 구부렸을 때 $110^{\circ}$에서 $135^{\circ}$ 사이의 값이 나온다. 여기서 구부렸을 때 고통을 호소하면 무릎 관절 및 근육에 이상이 있는 것이다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2017.07a
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• pp.338-339
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• 2017

안쪽번짐과 가쪽번짐이란 발목을 $90^{\circ}$중립자세가 되게하고 발 안쪽면과 바깥쪽면으로 구부리는 것을 말한다. 안쪽번짐의 각은 $20{\sim}35^{\circ}$가 정상이고 가쪽번짐의 각은 $10{\sim}20^{\circ}$가 정상이다. 발의 안쪽번짐과 가쪽번짐의 각이 정상치에 미달하거나 고통을 호소하면 이상이 있는 것이다. 따라서 그에 알맞은 치료법도 제시한다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2017.07a
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• pp.340-341
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• 2017

본 논문에서는 근골격계 질환 중에서 종종 발생하는 어깨 부위의 질환에 대하여 알아보도록 한다. 본 논문에서는 팔을 반듯이 위로 올렸을 때 통증이 발생하는 어깨 질환에 대한 도수치료법을 제시한다. 실험에서는 도수진단을 위하여 팔을 반듯이 위로 올릴 때 팔의 각도를 입력하고, 이상이 발생할 시 진단 및 치료법까지 시스템에서 제시한다.

• Communications of Mathematical Education
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• v.22 no.4
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• pp.505-514
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• 2008

In this paper we study on derivation of formulas for roots of quadratic equation, cubic equation, and quartic equation through method analogy. Our argument is based on the norm form of polynomial. We also present some mathematical content knowledge related with main discussion of this article.

• Journal for History of Mathematics
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• v.18 no.4
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• pp.67-84
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• 2005

In this paper, We make mathematics be more interesting and have students participate in class actively through studying the cultural value of mathematics and the ethnic custom mathematics. For studying probability of the usage of Wooden Die for Drinking Game as ethnic custom mathematics which was used in the United Shilla. We study how to apply our methods to our current school curriculum

• Analytical Science and Technology
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• v.29 no.6
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• pp.300-304
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• 2016

The asphalt antistripping agents were synthesized from ethylenediamine (ED) or N,N'-bis(2-hydroxyethyl)ethylenediamine (HEED) with three different fatty acids. The formation of amide bonds were successfully performed and confirmed by FT-IR and $^1H-NMR$ data. The adhesive properties of antistripping agents were compared in terms of contact angle and BBS test. The reaction product of ED with waste animal fat exhibited the most hydrophobic by the contact angle measurement, and the strongest water resistance of 94 % by BBS test. However, the reaction product of ED with waste vegetable oil showed the strongest absolute bond strength of ca. 3610 and 3227 kPa for before and after water conditioning, respectively. For the bond strength in general, the reaction products of ED were superior to HEED reaction products, and the reaction products of animal fat and waste vegetable oil were superior to those of pure soybean oil.

• Journal of Korean Home Economics Education Association
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• v.25 no.1
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• pp.55-66
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• 2013

The purposes of this study were to examine major satisfaction and career decision level of Home Economics Education major college students, to investigate factors influencing on major satisfaction and career decision level, and to provide basic informations for career counseling. A survey was conducted to students majoring Home Economics Education at four universities, and students majoring Korean Language Education and Mathematics Education at one same university in Seoul from October to November, 2011. General satisfaction in major of Home Economics Edu. students was above average, but social perception satisfaction was low. The social perception satisfaction was lower for Home Economics edu. students than Korean Language edu. and Mathematics edu. students. There were significant differences in major satisfaction by university and class standing, but no significant difference by gender. Students showed the lowest value in Home Economics teacher as considering job, and most of students considered teacher and major unconcerned job. Students considering major concerned job showed higher major satisfaction compared to students considering major unconcerned job. Career decision level was medium and there were not significant differences in career decision level by major, university, class standing, gender, considering job. Career decision level was affected positively by only general satisfaction in major.

• The Mathematical Education
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• v.44 no.2 s.109
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• pp.179-200
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• 2005

In this article, we compared and analyzed the Korean 7th National Mathematics textbooks and Harcourt Math textbooks in America focused on the area of geometry for the elementary school students. We expect that this article would contribute to the elementary school teacher for the reorganization of the elementary school mathematics curriculums.