• Journal of applied mathematics & informatics
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• v.18 no.1_2
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• pp.603-611
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• 2005

We present some geometric applications of extremal length. The method of extremal length leads a simple proofs of theorems. And we consider the applications of extremal length to the boundary behavior of analytic functions and derive theorems in connection with the conformal mappings. It shows us the usefulness of the method of extremal length.

• Journal of applied mathematics & informatics
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• v.24 no.1_2
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• pp.17-30
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• 2007

A new scheme for solving the Vlasov equation using a compactly supported wavelets basis is proposed. We use a numerical method which minimizes the numerical diffusion and conserves a reasonable time computing cost. So we introduce a representation in a compactly supported wavelet of the derivative operator. This method makes easy and simple the computation of the coefficients of the matrix representing the operator. This allows us to solve the two equations which result from the splitting technique of the main Vlasov equation. Some numerical results are exposed using different numbers of wavelets.

• Journal of applied mathematics & informatics
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• v.24 no.1_2
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• pp.305-312
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• 2007

Using a weaker version of the Newton-Kantorovich theorem [6] given by us in [3], we show how to refine the results given in [8] dealing with the analyzing of the effect of small perturbations in problem data on the solution. The new results are obtained under weaker hypotheses and the same computational cost as in [8].

• Proceedings of the Korean Vacuum Society Conference
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• 1993.02a
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• pp.29-31
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• 1993

NH3-pplasma treatment has been used for ppassivation of native-oxide-contaminated GaAs surface. Ex-situ band-gapp pphotoluminescence(ppL) measurement shows enhanced intensity for the treated surfaces. Auger electron sppectroscoppy(AES) shows that the treated surface contains nitrogen atoms but no arsenic atoms, which leads us to sppeculate that the graded GaN thin layer was formed on the surface. Based on these results, new metal-insulator-GaAs structure is ppropposed.

• Proceedings of the Korean Society of Embryo Transfer Conference
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• 2006.10a
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• pp.34-35
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• 2006

• Proceedings of the Korean Information Science Society Conference
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• 2011.06d
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• pp.225-226
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• 2011

IP traceback is an solution for Defending against distributed denial-of-service attacks, the Fragment Marking Scheme is the famous method for IP traceback problem. In this paper, we are interested in understanding the reconstruction process at the victim of Fragment Marking Scheme deeply and make us more clearly about its limitation based on some papers mentioning it.

• Proceedings of the Computational Structural Engineering Institute Conference
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• 2001.04a
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• pp.489-494
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• 2001

This paper deals with a dynamic modeling of artillery system loaded by gun charge explosion during firing condition. Geometric and elastic gun data are used to modify a projectile interaction model. The maximum impact force on gun barrel was 15,000 N and the gun barrel moved about 1.3 m. A cannon bal] was presented to travel in the flexible gun, the traveling distance was about 23,000 m, and the angular velocity was about 10rad/sec. The artillery dynamic system using the multi-body dynamics enables us to obtain the data for the fatigue analysis.

• Bulletin of the Korean Chemical Society
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• v.25 no.9
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• pp.1326-1330
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• 2004

Several new derivatives of oxazolidinone phosphonate, that are expected to show biological activity, were prepared efficiently by previously published methods. ${\gamma}$-Ketophosphonate 1 was synthesized using pentacovalent oxaphosphorane chemistry followed by reductive amination with aromatic amine of oxazolidinone 4. Biological activity of the synthetic compounds has been studied. One of the synthetic compounds showed promising result for us to pursue further studies.

• Proceedings of the Korean Institute of Intelligent Systems Conference
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• 2002.12a
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• pp.419-422
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• 2002

본 논문에서는 신경망에 비해 보다 단순화되고 빠르게 수렴하는 특성을 보이는 방사 기준함수 구조를 초기에 설계하기 위한 초기화 방법을 제안한다. 이를 위해 웨이블릿 변환을 이용한 분석 기법을 사용하였고, 주어진 문제에 적합한 방사 기준 함수 구조를 초기에 최적 상태로 결정하였다. 시간-주파수 평면에서 지역화 특성이 대상 함수를 근사할 수 있는 특성을 지닌 방사 기준 함수를 선택, 결정하여 은닉층을 구성할 경우, 근사 능력을 지닌 초기 구조를 결정함에 있어서 장점을 지닌다. 제안된 구조는 다층 전방향 신경망 또는 정규 배열된 방사 기준함수 구조에 비해 주어진 문제에 대해 좋은 성능을 보인다.

• Journal of the korean veterinary medical association
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• v.30 no.3
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• pp.187-194
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• 1994

이 자료는 사단법인 미국 수의공중보건협회(N.A.S.P.H.V.; National Association of State Public Health Veterinarians, Inc.)에서 제정한 동물 관견병 관리대책 컴펜디움 1993(Compendium of Animal Rabies Control, 1993)을 미합중국 연방정부(U.S. Federal Government), 보건후생성 공중보건국 전염병관리센타(US Department of Heal and Human Services, Public Health Service, Center for Disease Control and Prevention(CDC) Atlanta, Georgia 30333)에서 발행되는 MORBIDITY AND MORTALITY WEEKLY REPORT Volume 42, No RR-3(March 26, 1993)에 수록한 것인데, 우리나라의 광견병 방역대책 수립을 위한 참고자료로 활용하기 위하여 그 내용을 번역 소개한 것이다.