• Environmental engineer
• /
• v.24 s.245
• /
• pp.107-109
• /
• 2007

• Environmental engineer
• /
• v.24 s.248
• /
• pp.98-102
• /
• 2007

• Journal of the Korea Construction Safety Engineering Association
• /
• s.43
• /
• pp.107-110
• /
• 2007

• Journal of the Korea Construction Safety Engineering Association
• /
• s.53
• /
• pp.63-70
• /
• 2011

• Journal of the Korea Construction Safety Engineering Association
• /
• s.48
• /
• pp.94-102
• /
• 2009

• Journal for History of Mathematics
• /
• v.18 no.3
• /
• pp.25-38
• /
• 2005

We briefly survey the history of Chinese mathematics which concerns the resolution of right triangles. And we analyse the problems Yucigugosulyodohae(劉氏勾股述要圖解) which is the mathematical book of Chosun Dynasty and contains the 224 problems about right triangles only. Among them, 210 problems are for resolution of right triangles. We also present the methods for generating the Pythagorean triples and constructing polynomial equations in Yucigugosulyodohae which are needed for resolving right triangles.

• School Mathematics
• /
• v.11 no.3
• /
• pp.415-429
• /
• 2009

In this study, in order to use history of mathematics in mathematical learning effectively, we investigate application of history of mathematics shown textbooks in simultaneous equations. History of Mathematics can be used in order to enhance comprehension and increase interest in an introduction to the simultaneous equations. It also can be used to help motivate middle school students to solve the simultaneous equations with much interest during the development phase, and develope open thinking and reflective thinking in the enrichment learning.

• The Journal of the Convergence on Culture Technology
• /
• v.8 no.1
• /
• pp.441-452
• /
• 2022

Training using metacognition in a learning environment is one of the topics that have been continuously studied since the 1990s. Metacognition can be broadly divided into declarative metacognitive knowledge and procedural metacognitive knowledge (metacognitive skills). Accordingly, metacognitive training has also been studied focusing on one of the two metacognitive knowledge. The purpose of this study was to examine the role of metacognitive skills training in the context of mathematical problem solving. Specifically, the learner performed the prediction of problem difficulty, estimation of problem solving time, and prediction of accuracy in the context of a test in which problems of various difficulty levels were mixed within a set, and this was repeated 5 times over a total of 5 weeks. As a result of the analysis, we found that there was a significant difference in all three predictive indicators after training than before training, and we revealed that training can help learners in problem-solving strategies. In addition, we analyzed whether there was a difference between the experiment group and control group in the degree of test anxiety and math achievement. As a result, we found that learners in the experiment group showed less emotional and relationship anxiety at 5 weeks. This effect through metacognitive skill training is expected to help learners improve learning strategies needed for test situations.

• Journal of the KSME
• /
• v.23 no.6
• /
• pp.448-458
• /
• 1983

보의 처짐(deflection of beam) 및 부정정보(statically indeterminate beam)의 문제는 수문이나 압력용기등을 비롯한 각종 구조물의 강도계산에서 설계자가 자주 부딪치는 문제이다. 일반적으로 분포하중이나 집중하중 또는 집중 모우멘트가 작용하는 보, 특히 부정정 보의 경우 해석하기 쉬운 방법을 찾아 모우멘트-면적법, 중첩법, 3-모우멘트의 방정식등을 사용하여 반력이나 반력 모우멘트, 처짐량 등을 계산하고 있다. 그러나 이들 방식들은 일률적으로 어느 경우에나 적용하기에 적합한 것은 아니고 복잡한 각종 정리나 공식들을 사용하여야 하며 공액보(conjugated beam)의 반력을 구한다든가, 선도의 면적을 구하기 위하여 힘든 계산을 행하여야 하는 등 쉽지 않아, 부정정 보를 풀어야 할 경우가 발생할 때마다 좀 더 쉬운 접근방법이 없을까 하는 애로를 느껴왔다. 그러던 차 특이함수를 도입하여 문제의 해결을 시도하여 본 바, 복잡한 공식들을 외울 필요 없이 규칙적이고 일률적인 방법으로 쉽게 문제의 해결이 가능하기에 여기 간단히 풀이 방법을 소개하고자 한다.

• Proceedings of the Korean Society of Computer Information Conference
• /
• 2018.07a
• /
• pp.421-422
• /
• 2018

작업 순서 결정 문제의 목표는 다양한 작업들에 대한 최적의 처리 순서를 결정하여 총 처리시간이나 납기 지연과 관련된 지표들을 최소화하는 것이다. 나아가, 실제 생산 현장에서는 작업 처리 순서를 결정할 때, 긴급도나 고객과의 관계 등과 같은 요인을 고려하여 일부 작업들을 특정 시간 내에 완료해야 할 수 있으며, 이 같은 제약 조건을 완료 시간 제약이라 한다. 본 논문에서는 완료 시간 제약을 갖는 작업 순서 결정 문제의 개념과 특성에 대해 살펴보고, 이러한 문제를 풀이하기 위한 알고리즘 개발에 후보 순위 접근법을 적용할 것을 제안한다.