• The KIPS Transactions:PartB
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• v.14B no.1 s.111
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• pp.5-12
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• 2007

This paper gives a novel approach that can be represented an image efficiently with its region and shape information together. To do this, we introduced a region-centralized shape descriptor(RCSD) that the size of region only exists at a center point. RCSD consists of circles with three parameters, the distance and the angle between the tenter points, and the diameter, respectively We verified the RCSD parameters to have an information of shape. We can be proved this by reconstructing the shape from the given parameters and evaluated the difference between the its image and the original one. To get this image, we find the estimated points on the contour from the parameters, and connect them by using an interpolation. According to the evaluation, we obtained 88% performance for real images, and showed that it can be used efficiently for representing the binary images. Also we cu make RCSD parameters to be the normalized patterns to have an invariant of its scale or position, and expand them to improve the quality of the performance.

• Proceedings of the Korean Information Science Society Conference
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• 2005.11b
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• pp.265-267
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• 2005

최근 포유동물의 유전체에는 알려진 것보다 훨씬 많은 RNA 전사체가 발현되고 있음이 밝혀지고 있으며, 그 중에 많은 부분이 non-coding RNA로 알려지고 있다. 세포 내에서 non-coding RNA의 기능이 훨씬 다양해지고, 중요해지고 있는 상황에서 새로운 non-coding RNA를 정의하고, 탐색하는 것은 가장 시급한 과제이다. 본 연구에서는 이전 연구에서 RNA 공통 구조 학습을 위해 제안되었던, esRCSG (evolutionary search for RNA common-structural grammar) 알고리즘의 성능 향상을 위해, committee machine을 도입한다. Committee machine은 마지막 세대에서 최적화된 RNA 공통 구조 기술자 (RCSD)와 차상위로 최적화된 기술자들 중 양성데이터와 음성데이터의 치역을 합쳤을 때 특이도는 거의 변화가 없으면서 민감도의 증가가 가장 큰 기술자들의 집합이다. Committee machine은 특히 family type의 서열의 가진 특정 ncRNA에서 좋은 성능 향상을 보인다. microRNA를 이용한 성능평가에서 특이도의 변화가 거의 없이 민감도의 성능이 약 1.5배 향상되는 결과를 보였다. 이러한 특이도와 민감도가 높은 기술자를 이용함으로써 새로운 non-coding RNA를 예측하는 것을 약속할 수 있을 것이다.

• Journal of applied mathematics & informatics
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• v.32 no.1_2
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• pp.161-169
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• 2014

We in this paper obtained the theoretical results for multivariate stochastic processes which help us to extended negatively orthant dependent(ENOD) structures among hitting times of the processes. In addition, some applications are given to illustrate these concepts.

• Proceedings of the Korea Concrete Institute Conference
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• 1999.10a
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• pp.729-732
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• 1999

In this paper, the Mohr-Coulomb criterion was adopted to predict the bonding failure load of the reinforced concrete beams strengthened by the externally bonded steel plates. Based on this criterion, a nonlinear analysis program of APSB(Analysis Program for Strengthened Beams) and nonlinear finite element analysis program of RCSD-SB (Reinforced Concrete Structural Design - Strengthened Beams) were developed. Numerical results were then compared with experimental results and good agreements were obtained.