• Proceedings of the Zoological Society Korea Conference
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• 1998.10b
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• pp.219.2-219
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• 1998

No Abstract, See Full Text

• Bulletin of the Korean Mathematical Society
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• v.42 no.4
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• pp.691-701
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• 2005

We study the strong stability for linear differential systems in connection with too-similarity, and investigate the asymptotic equivalence between linear differential systems.

• Proceedings of the Korean Institute of Communication Sciences Conference
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• 2004.07a
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• pp.222-222
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• 2004

• Proceedings of the Zoological Society Korea Conference
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• 1998.04a
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• pp.44.2-44
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• 1998

No Abstract, See Full Text

• Proceedings of the Zoological Society Korea Conference
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• 1996.10a
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• pp.131.2-131
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• 1996

No Abstract, See Full Text

• Proceedings of the Zoological Society Korea Conference
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• 1997.10b
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• pp.128.1-128
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• 1997

No Abstract, See Full Text

• Proceedings of the Korean Institute of Landscape Architecture Conference
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• 1999.03a
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• pp.38-39
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• 1999

• Proceedings of the IEEK Conference
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• 2004.08c
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• pp.810-813
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• 2004

In this paper, a background initialization for video surveillance proposed. The proposed algorithm is that the background images are sampled n frames during ${\Delta}t$ All Sampling frames are divided by $M{\times}N$ size block every frame. Average values of pixels for same location block of the sampling frames during ${\Delta}t$t are taken. then the maximum intensity $\alpha$ and the minimun intensity $\beta$ is obtained, respecticely. The intial by $M{\times}N$ size block, then average intensity $\eta$ of pixels for the block is obtained. If the average intensity $\eta$ is out of the initial range of the background image, it is decided the moving object image, and if the average intensity $\eta$ is included in the initial range of the background image. it is decided the background image. To examine the propriety of the proposed algorithm in this paper, the accuracy and robustness evaluation results for human and car in the indoor and outdoor enviroment. the error rate of the proposed method is less than the existing methods and the extraction rate of the proposed method is better than the existing methods.

• Journal of The Korean Association of Information Education
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• v.5 no.3
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• pp.389-400
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• 2001

The Internet Game is widespreaded quickly on web, and there are many kinds of funny games for users to use easily, so that can be applied to ICT(Information Communication Technology)education. In this paper, we provide the analysis on the usage of Internet games for children and teachers that is conducted by the decision tree algorithm, which is one of the popular data mining techniques. The results show the pattern of children's and teachers' usages of Internet games.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2003.07a
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• pp.219-222
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• 2003

In this paper, we designed a Ku-band BPF(Band Pass Filter) by microstrip line that most usually used a microwave device design and fabrication. Here a substrate of designed BPF were silicon substrate(${\varepsilon}_r=11.8$), and metal line was copper and silver/copper structure. And a configration of BPF was used hairpin pattern. A center frequency of designed BPF was 10GHz and their FBW(Fractional Band Width) was 20%(2GHz). It presented simulated results obtained for a 10GHz filter which yields an insertion loss of 0.1dB that ripple value related chebyshev reponse. Finallt we tried to make that a 30dB attenuation frequency was 20% of center frequency.