• The Science & Technology
• /
• no.5 s.444
• /
• pp.42-44
• /
• 2006

"예쁜 그림 감상하듯 수학문제 풀었어요" - 황준묵 고등과학원 수학부 교수/ "신약개발로 생명 비밀 풀고파" - 김성훈 서울대학교 약학대학 교수/ "테라비트 낸드플래시도 가능할 것" - 황창규 삼성전자 반도체총괄 사장

• The Journal of the Korea Contents Association
• /
• v.10 no.4
• /
• pp.447-457
• /
• 2010

Mathematical principle is present in artwork or architectural building. It is important for middle school students to find these mathematical principles in artwork. But it is difficult to achieve original purpose of art education through student activity that only looks for mathematical principle present in artwork and architectural building. Thus, it is necessary for students to have activities to find mathematical principle in artwork for themselves through artistic experience and appreciation of artwork and to create, appreciate and express new artwork to which they apply the mathematical principle. In this article, I researched a couple of artwork or architectural buildings from this point of view in which mathematical principle is present. I also developed hypothetical teacher activities and student activities for program by providing artwork of Escher in which mathematical principle is present as an example.

• Journal of Educational Research in Mathematics
• /
• v.24 no.3
• /
• pp.443-465
• /
• 2014

Mathematics subject has been recognized as a subject in which we resolve some problematic situations through the logical and mathematical thinking according to mathematical concepts, principles, and rules. So we has focused on cultivating logical and mathematical thinking abilities when teaching and learning mathematics. However according to Bruner, we can use the narrative mode of thought which supplements the logical and scientific mode of thought when we think about logical and scientific matters, and we could make meanings by doing so. On the other hand, the Ministry of Education has announced recently that it would develope the textbooks of storytelling type of mathematics, and then many people have been interested in using stories in mathematics subject. The purposes of this article are to investigate the effects and the defects of using stories in mathematics subject, to probe the narrative characteristics of mathematics, and to inquire how using mathematics narrative can make students to make meaning about mathematics which compensates the defects of using stories in mathematics subject. And the main purpose is to inquire the implications of using mathematics narrative in teaching and learning mathematics.

• Journal of Biomedical Engineering Research
• /
• v.21 no.5
• /
• pp.441-448
• /
• 2000

방출단층영상 재구성을 위한 최대우도 기대값최대화(maximum likelihood expectation maximization, MLEM) 방법은 영상 획득과정을 통계학적으로 모델링하여 영상을 재구성한다. MLEM은 일반적으로 사용하여 여과후역투사(filtered backprojection)방법에 비해 많은 장점을 가지고 있으나 반복횟수 증가에 따른 발산과 재구성 시간이 오래 걸리는 단점을 가지고 있다. 이 논문에서는 이러한 단점을 보완하기 위해 계산시간을 현저히 단축시킨 배열된부분집합 기대값최대화(ordered subsets expectation maximization. OSEM)에 Gibbs 선행치인 membrance (MM) 또는 thin plate(TP)을 첨가한 OSEM-MAP (maximum a posteriori)을 구현함으로써 알고리즘의 안정성 및 재구성된 영상의 질을 향상시키고자 g나다. 실험에서 알고리즘의 수렴시간을 가속화하기 위해 투사 데이터를 16개의 부분집합으로 분할하여 반복연산을 수행하였으며, 알고리즘의 성능을 비교하기 위해 소프트웨어 모형(원숭이 뇌 자가방사선, 수학적심장흉부)을 사용한 영상재구성 결과를 제곱오차로 비교하였다. 또한 알고리즘의 사용 가능성을 평가하기 위해 물리모형을 사용하여 PET 기기로부터 획득한 실제 투사 데이터를 사용하였다.