• 한국수학교육학회지시리즈A:수학교육
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• 제49권4호
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• pp.501-522
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• 2010

In this study, 'Instruments of the achievement attribution in mathematical learning' was develop to investigate the reasons of mathematical learning achievement by reflecting Korean middle school and high school students' psychological characters and learning context in mathematical learning. To develop the appropriate items for the achievement attribution in mathematical learning, after reviewing attribution literature thoroughly, first version of the instrument was developed and Exploratory Factor Analysis and Confirmatory Factor Analysis were conducted. Then, to reduce the effect of the gender difference and achievement level difference, Differential Item Functioning was performed. Also, using Multiple group Confirmatory Factor Analysis, this instrument was investigated to see whether this can be used for both middle school and high school. The final items for success attribution are 3 items for luck, 3 items for effort, 2 items for ability. The failure attribution were composed of 3 items for luck, 3 items for effort, 2 items for ability, and 2 items for other. The instrument was developed by using large samples and psychometric analysis. Therefore, mathematic teachers can use this instrument efficiently to make a foundation for better learning environment so students' cognitive area and affective area can be harmonized.

• Korean Journal of Mathematics
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• 제14권1호
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• pp.125-136
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• 2006

Using the Bumping algorithm for the shifted rim hook tableaux described in [5], we construct Schensted insertion and deletion algorithms for shifted rim hook tableaux. This may give us the combinatorial proof for the orthogonality of the second kind of the spin characters of $S_n$.

• Kyungpook Mathematical Journal
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• 제58권4호
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• pp.627-635
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• 2018

In this paper, we use the notion of characters of transformations provided in [8] by Purisang and Rakbud to define a notion of weak regularity of transformations on an arbitrarily fixed set X. The regularity of a semigroup of weakly regular transformations on a set X is also investigated.

• 한국초등수학교육학회지
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• 제16권1호
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• pp.39-61
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• 2012

학교 교육을 통하여 창의적인 인간을 양성해야 한다는 요구가 계속되고 있다. 특히 2011 수학과 교육과정 개정에서는 수학적 창의성과 인성을 길러주는데 초점을 두고 있다. 이를 위해 교육 현장에서 학생들의 창의성 개발을 위한 구체적인 방안의 모색이 필요하다. 이에 본 연구에서는 수학적 창의성의 요소를 추출하고, 창의성 개발을 위한 수업 모델을 탐색해 보았다. 먼저, 수학적 창의성에서의 논점과 수학적 창의성의 요소를 인지적, 정의적, 태도적 측면으로 알아보았다. 이러한 요소들은 수학적 창의성 개발 수업에서 창의성 개발에 영향을 주는 요소이며, 창의성을 평가하는 요소가 될 것이다. 이러한 기저를 바탕으로 수학 학습에서 학생들의 수학적 창의성을 기를 수 있는 8가지 수학과 창의성 개발 수업 모델을 제시하였다. 8가지 수학적 창의성 개발을 위한 수업 모델은 수학의 특성과 최근에 강조되는 수학교육 이론 및 창의성 이론을 바탕으로 하였다.

• 한국수학교육학회지시리즈E:수학교육논문집
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• 제27권4호
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• pp.391-406
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• 2013

우리의 수학 용어는 대부분 한자말로 되어 있다. 수학을 가르치고 배우는 사람 대부분이 한글 세대인 현 상황에서는 한자말 수학 용어를 쉽게 이해할 수 있는 장치를 마련해야 하는데, 부적절해서 잘못된 개념을 심어줄 수 있는 용어는 피하고 뜻은 다르지만 소리가 같은 용어는 가능하면 한글만으로도 구별할 수 있도록 해야 한다. 이런 과정에서 토박이말을 활용할 여지가 있으며, 국가 교육과정이 중요한 역할을 할 수 있다. 여기서는 구체적인 예를 통해 수학 용어의 바람직한 개선 방향을 살펴본다.

• 한국수학교육학회지시리즈A:수학교육
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• 제40권1호
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• pp.15-25
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• 2001

The purpose of this thesis is to search the situation of an outbreak of the fallacy and methods of its treatment. We regard intuition as origins of genuine knowledge, but it sometimes raises the fallacy by intrinsic characters of itself. It makes an examination of the fallacy of the sense of sight like an optical illusion to instance that of sense. The sense of sight is an important factor in an intuitive cognition. However, its activity without thinking raises the fallacy of intuition in the process to observe and judge the things. I point out the fallacy of intuition which originates from terms and concepts in mathematical problems. The concept of mean velocity is representative. In this case, students make a mistake which means velocity can be solved by dividing the sum of v$_1$ and v$_2$ into two. The methods which overcome the fallacy of intuition are balance of intuition and logic, overcome of functional fixedness, the development of intuitive models and the development of metacognitive ability.

• Journal of Information Processing Systems
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• 제17권1호
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• pp.1-13
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• 2021

In this research, we study the problem of font image skeletonization using an end-to-end deep adversarial network, in contrast with the state-of-the-art methods that use mathematical algorithms. Several studies have been concerned with skeletonization, but a few have utilized deep learning. Further, no study has considered generative models based on deep neural networks for font character skeletonization, which are more delicate than natural objects. In this work, we take a step closer to producing realistic synthesized skeletons of font characters. We consider using an end-to-end deep adversarial network, SkelGAN, for font-image skeletonization, in contrast with the state-of-the-art methods that use mathematical algorithms. The proposed skeleton generator is proved superior to all well-known mathematical skeletonization methods in terms of character structure, including delicate strokes, serifs, and even special styles. Experimental results also demonstrate the dominance of our method against the state-of-the-art supervised image-to-image translation method in font character skeletonization task.

• 한국수학교육학회지시리즈A:수학교육
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• 제58권2호
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• pp.225-237
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• 2019

수학 교과의 그림은 내용의 핵심을 잘 전달하면서 한편으로는 수학의 어려움을 완화시켜주는 복합적인 역할을 해야 한다. 본 연구는 그림과 글의 상호 보완적 관계, 그리고 그림의 감정 표현이라는 두 요소를 초등학교 수학 교과서 그림과 내용의 연계성을 보는 관점의 예로 제시하고, 중국, 일본, 인도, 미국 등의 외국 교과서를 이 관점에서 조사하여 우리나라 교과서 그림 제작에 대한 시사점을 얻었다. 이는 그림을 읽고 의미를 해석하는 과정을 수학 공부의 일부로서 다루어야 한다는 것, 등장인물이 가진 개성과 감정을 더욱 풍부하고 자유롭게 표현해야 한다는 것 등이다.

• 한국통신학회논문지
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• 제22권6호
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• pp.1160-1169
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• 1997

This paper presents an algorithm to separate vowels from consonants in Korean characters captured in noisy environment andto recognize them. The algorithm has been originally developed for recognition of the usage code (which is represented by a single Korean character) in the license plates of Korean vehicles. It, however, could be easily adopted to other applications with minor changes, in which character recognition is needed and the environment is noisy. The key ideas of the algorithm are to localize the vowels utilizing Hough transformation and to separate the vowels from consonants utilizing mathematical morphology. We observed that the presented algorithm effectively separates vowels even if the vowels and consonants are joined together after thresholding. We also observed that our algorithm outperforms some conventional algorithms especially when the input images are noisy. The details of the comparison study are presented in the paper.

• 한국수학사학회지
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• 제27권1호
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• pp.31-45
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• 2014

The book Su Hak Ip Mun(數學入門, Introduction to Mathematics) is one part of 5 sections of the book Seung Aeh Ill Chan(升厓日簒), which is a hand written manuscript in Chinese characters and the author and the date of writing is unknown. The book Seung Aeh Ill Chan begins with the song of division table so called Guguiga(九歸歌). We first investigate and compare the writing pattern of this with other old Korean mathematical books. Next, we investigate typical expression and calculation methods of mathematical contents and terminologies used in Su Hak Ip Mun and also figure out oddities of writing pattern of mathematical expression and cultural circumference of several problems dealt in the book. From these analysis and investigation, we estimate the writing date of Su Hak Ip Mun later than the year 1723 on which Su Ri Jeong On(數理精蘊) was first published. And we presumably guess that Guguiga and Su Hak Ip Mun are made not for practical use or theoretical purpose but for text to teach students.