• Proceedings of the Korea Concrete Institute Conference
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• 2005.05b
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• pp.121-124
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• 2005

As a countermeasure about that, in this situation that suggest utilizing mixed drush sand and particle washed sand, this study is reviewing and comparing, as a experimental and positive test, mixed both workability and engineering properties of mortar, The purpose of this study make a suggestion that is fundamental data for utilizing mixed crush sand and particle washed sand.

• The Bulletin of The Korean Astronomical Society
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• v.34 no.1
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• pp.85.2-85.2
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• 2009

• The Bulletin of The Korean Astronomical Society
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• v.34 no.1
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• pp.86.1-86.1
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• 2009

• The Bulletin of The Korean Astronomical Society
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• v.34 no.1
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• pp.86.2-86.2
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• 2009

• Journal of applied mathematics & informatics
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• v.23 no.1_2
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• pp.581-588
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• 2007

We reconsider the classical orthogonal polynomials which are solutions to a second order differential equation of the form $$l_2(x)y'(x)+l_1(x)y'(x)={\lambda}_ny(x)$$. We investigate two characterization theorems of F. Marcellan et all and K.H.Kwon et al. which gave necessary and sufficient conditions on $l_1(x)\;and\;l_2(x)$ for the above differential equation to have orthogonal polynomial solutions. The purpose of this paper is to give a proof that each result in their papers respectively is equivalent.

• Bulletin of the Korean Chemical Society
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• v.27 no.1
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• pp.130-132
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• 2006

• 월간산업보건
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• no.7 s.243
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• pp.74-75
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• 2008

• Proceedings of the Korean Information Science Society Conference
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• 2005.07a
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• pp.466-468
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• 2005

본 논문의 연구에서는 IEEE 802.l1e MAC (Medium Access Control) 프로토콜을 NS-2 등과 같은 저명한 시뮬레이터들보다도 진보적인 NCTUns 시뮬레이터를 이용하여 개발하였다. 구현한 시뮬레이레션 모듈을 기반으로 다양한 측면의 실험하여 그 성능을 검정하였고, 본 논문에서는 특히 EDCA (Enhanced Distributed Channel Access)의 성능 결정에 중요한 요인이 되는 주요 파라미터에 대해서 성능을 분석하였다.

• Bulletin of the Korean Space Science Society
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• 2009.04a
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• pp.60.3-61
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• 2009

• Bulletin of the Korean Space Science Society
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• 2009.04a
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• pp.61.1-61.1
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• 2009