• Proceedings of the KIEE Conference
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• 2007.07a
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• pp.870-871
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• 2007

As the system with current is heat generation system, it has to be analyzed to consider effect in virtue of temperature. Hence this paper examined the solution of the coupled thermalelectro-mechanical problem. Mechanical modeling, force computation, electromagnetic field solution, and heat transfer modeling are addressed. It accomplished electro-mechanical coupled system analysis considering a temperature, the analysis method is by using extracted circuit parameters with resistivity by heat transfer analysis and inductance by electromagnetic analysis.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 1999.11a
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• pp.81-84
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• 1999

For the research of the effects on suspension solution with YBCO and BSCCO for elcectrophoretic deposition to prepare superconducting thick-film wire, it was investigated that the preheating technique for the superconducting powders in vacuum system was used with various solvent solutions of acetone, ethanol, toluene and buthanol for electrophoresis. As a result it was useful to remove the influence of remaining and adsorbed solvent solution which was existed between and on the particle surfaces when the specimens of superconducting wire by electrophoresis were treated in vacuum of 10$\^$-3/ Torr and temperature around 200$^{\circ}C$ in bell-jar system. From the prepared superconducting wire samples, the critical current density, Jc was measured by 4-point prove method in liquid N$_2$ at the value of 10$\^$3/ to 10$\^$4/ A/$\textrm{cm}^2$, respectively, for the YBCO and BSCCO superconducting wires.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2000.07a
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• pp.909-912
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• 2000

We synthesized polypyrrole (PPy) nanotubules by oxidative polymerization of the pyrrole monomer within the pores of a polycarbonate template. The electrochemical behavior was investigated using cyclic voltammetry. The redox potential was about -0.5 V vs. Ag/AgCl reference electrode, while the potential was about 0 V for PPy film. It is considered as the backbone grows according to the pore wall. Therefore, it is possible to be arranged regularly. That leads to improvement in the electron hopping. By electrochemical doping of glucose oxidase (GOx) on PPy nanotubules, an enzyme electrode has been fabricated. The kinetic parameter of biochemical reaction with glucose was evaluated. The formal Michaelis constant and maximum current calculated by computer were about 11.4 mmol $dm^3$ and 170.85 A respectively. Obviously, an affinity for the substrate and current response of the PPy nanotubules enzyme electrode are rather good, comparing with that of PPy film.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2005.07a
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• pp.292-293
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• 2005

An electromagnetic memory effect observed in superconducting YBCO system was studied. From the measurement of differential conductance, it was cleared that the mechanism of electromagnetic memory can not be explained by using conventional flux flow model. By changing the density of external magnetic flux, changes in inductance of a coil in which a superconducting bar is inserted were also measured. It was concluded that the electromagnetic memory effect aries from the interaction between the trapped magnetic flux and the weak link of the filament formed in the superconducting bar.

• Proceedings of the KIEE Conference
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• summer
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• pp.394-396
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• 2004

In order to reduce the sheath circulating current, same arrangement and balanced length of cable are required for the underground cable system. But practically, changing the whole arrange of cable which is already constructed is impossible. Therefore, It is necessary to apply the restraining-unit of sheath circulating current at the cross-bonding wire of insulated joint because the impedance of restraining-unit is able to reduce sheath circulating current at a normal condition. Even at a transient state, the restraining-unit must maintain electrical and mechanical characteristics. In this paper, the features of restraining-unit developed by LG Cable as well as the electrical test results are described. It proves that the restraining-unit is applicable to the underground cable system where sheath circulating current rises.

• Proceedings of the Korea Information Processing Society Conference
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• 2012.11a
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• pp.1129-1132
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• 2012

최근 환경보호를 위한 그린IT 기술이 주목을 받으면서 정부차원의 스마트 그리드가 부각되고 있다. 스마트 그리드는 궁극적으로 전력을 효율적으로 사용하여 소비자는 전력사용 요금을 절감하고 정부는 환경을 보호할 수 있게 된다. 하지만, 정부 차원에서의 일방적인 전력관리에는 한계가 있고 전력을 소비하는 사용자 역시 능동적으로 전력 사용량을 줄여야 큰 효과를 볼 수 있다. 따라서 본 논문은 임베디드 센서네트워크를 기반으로 일반 사용자도 댁내에서 혹은 빌딩에서 능동적으로 사용할 수 있는 스마트 전력절감 시스템을 제안한다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2019.01a
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• pp.377-380
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• 2019

To accommodate for the difficult task of satisfying application's system timing constraints, we are developing Splash, a real time stream processing language for embedded AI applications. Splash is a graphical programming language that designs applications through data flow graph which, later automatically generates into codes. The codes are compiled and executed on top of the Splash runtime system. The Splash runtime system supports two aspects of the application. First, it supports the basic stream processing functions required for an application to operate on multiple streams of data. Second, it supports the checking and handling of the user configurated timing constraints. In this paper we explain the implementation of the first aspect of the Splash runtime system which is being developed using a real time communication middleware called DDS.

• Proceedings of the Korea Information Processing Society Conference
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• 2023.11a
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• pp.934-935
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• 2023

반려묘 수가 늘어나는 현대 사회에서 동물 의료 낙후 지역의 보호자는 고양이의 정확한 건강 상태를 파악하기 어렵다. 본 논문에서는 고양이가 가장 흔하게 걸리는 질병인 '결막염'을 비대면으로 진단하고자, 전이학습(Transfer Learning) 기반의 딥러닝 모델을 이용한 웹 애플리케이션을 개발 및 배포하였다. 이를 통해 고양이 결막염 발병 여부 조기 진단 및 치료비 절감, 반려묘 보호자의 편의성 증대 및 동물 의료 서비스의 지역 편차를 줄이는데 기여하고자 한다.

• Proceedings of the KIEE Conference
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• 2004.07c
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• pp.1790-1792
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• 2004

This paper deals with the lightning test methods on aircraft. It shows lightning current and voltage test waveforms referred to SAE ARP 5412. According to this standard, to test lightning effects, mixes appropriately 5 waves for current and 4 waves for voltage depend on structure and comparison information.

• 전기의세계
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• v.26 no.5
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• pp.65-73
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• 1977

This paper work treats with the basic characteristics to be investigated in development of a single-phase linear induction motor. The results of this research work have established some important characteristics which should be taken into consideration in the design and construction of this linear motor, And it is also proven that the development of high-voltage linear machine with large capacity is possible.