• 전자공학회논문지B
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• 제29B권11호
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• pp.85-92
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• 1992

In this paper we propose a diffusion neural network model. In this model, each excitatory and inhibitory neuron has the capability of diffusing external excitations. We show that this model can be used for the detection of intensity changes of an input image. The relations between the diffusion coefficient, the iteration number of diffusion, and the detected spatial frequency are analyzed. The calculation time is reduced than that of a LOG(a Laplacian of a Gaussian) method.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2000년도 하계학술대회 논문집 B
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• pp.876-878
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• 2000

In this paper, the characteristic of the Linear DC motor(LDM) are analyzed by using 3 Dimensional Equivalent Magnetic Circuit Network (3D EMCN), the movement of mover substitutes for the movement of magnetization in permanent magnet expressed by Fourier series, thrust characteristic analysis is performed and the appropriateness of analysed result is verified by comparing with the results of 2 Dimensional Finite Element Method (2D FEM) and experiment.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2009년도 춘계학술대회
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• pp.105-107
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• 2009

본 논문에서는 대형 매장 혹은 임의의 공간과 공간사이에 다른 뮤직콘텐츠를 필요로 할 때 이를 해결해 줄 수 있는 멀티 스트리밍 플랫폼에 대해 연구한다. 사용자의 인터넷 사용을 겸하기 위해 NAT를 구성하고, Multi-Channel Connection을 위한 Application 설계방법과 그에 따른 Multi Stream을 위한 Hardware Path를 구현하는 방법을 제안한다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2002년도 ICCAS
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• pp.102.3-102
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• 2002

$\textbullet$ Human and computer interface(HCI) $\textbullet$ Voice recognition $\textbullet$ Image recognition $\textbullet$ Neural network $\textbullet$ Hopfield net

• 한국컴퓨터정보학회논문지
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• 제8권1호
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• pp.44-50
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• 2003

이동(Wireless ＆ Mobile) 통신단말기 사용자가 내부 네트워크 안의 정보서버로 접속을 원할 시에, 불법적인 침입으로부터 무선네트워크의 자원을 보호하기 위해 무선 정보보안이 요구된다. 이동통신단말기의 무선네트워크에 접속 시 정보보호를 위해 유일한 경로에 설치된 무선방화벽이 필요하다. 본 논문에서 방화벽의 주요 기능인 패킷필터링, NAT(Network Address Translate), 인증, 무결성, 그리고 감사기록 기능들이 무선상태에서 이루어지도록 무선방화벽을 설계한다. 그리고 무선방화벽상태에서 패킷 필터링, NAT, 인증, 무결성, 그리고 감사기록 기능을 구현하고, 기능들을 확인한다. 그리고 무선 방화벽의 연구개발을 위한 발전적인 제안을 통해 한국 무선방화벽의 기능향상과 성능개선에 도움을 주고자 한다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2002년도 ICCAS
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• pp.90.1-90
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• 2002

Counters for the various kinds of bank notes require high-speed distinctive point extraction and recognition for notes. In this paper we propose a new point extraction and recognition algorithm for bank notes. For distinctive point extraction we use a coordinate data extraction method from specific parts of a bank note representing the same color. The recognition algorithm uses a back-propagation neural network that has coordinate data input. The proposed algorithm is designed to minimize recognition time.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 하계학술대회 논문집 D
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• pp.2483-2485
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• 2003

As design a network system that should command and response to do tasks by PLC, to make factory automation for being distributed facilities which are not guaranteed procedure, through polling method, commands are send orderly by PLC and responses are answered by each sub-unit. It make a guarantee of sequence and drive a master-slave operation in network. This method help to distribute procedure systems and make possible dividing tasks to each unit. To make this method, network protocol's format have Master or Slave ID and tasking data and Master's command or Slave unit's report. In network interpret algorithm, skip algorithm are included and it make guarantee of protecting data though network are in noise. Data that are made by this method are send to PC to transmit long-distance user by internet.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2002년도 하계학술대회 논문집 B
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• pp.773-775
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• 2002

This paper deals with 3 Dimensional(3D) analysis of magnetic flux density of High Temperature Superconducting(HTS) motor using 3D Equivalent Magnetic Circuit Network (EMCN). When the Finite Element Method (FEM) is applied to an analysis of 3D models, it takes much time to the pre-process work required for 3D modeling and to solve the differential equation. Compare with 3D FEM, the result of 3D EMCN by using the magnetic resistance and magnetomotive force is exact and rapid. The accuracy of 3D EMCN is verified by comparing the 3D EMCN analysis with that of 3D FEM in HTS motor.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2011년도 춘계학술대회
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• pp.543-545
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• 2011

기반 구조 시스템 없이도 모바일 단말기 노드 사이에서 이동성 보장, 무선 네트워크를 구성할 수 있는 MANET VoIP에 많은 관심을 받고 있다. 하지만 이런 편리성과 다르게 유선 네트워크 시스템보다 외부 네트워크 공격자에 의해 시스템의 접근과 변경이 쉽기 때문에 보안 문제에 큰 이슈가 되고 있다. 이 논문에서는 기본적인 웹 망에서 보안 문제를 해결하는 NAT와 방화벽(Firewall)이 MANET VoIP에서 적합한지 알아보고 이를 해결할 수 있는 기술을 제안한다.

• 한국전산유체공학회지
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• 제19권1호
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• pp.47-56
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• 2014

Since a typical plate heat exchanger is made up of a huge number of unitary cells, it may be impossible to predict the aero-thermal performance of the full scale heat exchanger through three-dimensional numerical simulation due to the enormous amount of computing resources and time required. In the present study, a simple flow-network model using the friction factor correlation and a thermal-network model based on the effectiveness-number of transfer units (${\varepsilon}$-NTU) method has been developed. The complicated flow pattern inside the cross-corrugated heat exchanger has been modeled into flow and thermal networks. Using this model, the heat transfer between neighboring streams can be considered, and the pressure drop and the heat transfer rate of full-scale heat exchanger matrix are calculated. In the calculation, the aero-thermal performance of each unitary cell of the heat exchanger matrix was evaluated using correlations of the Fanning friction factor f and the Nusselt number Nu, which were calculated by unitary-cell CFD model.