• Proceedings of the KIEE Conference
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• 2005.07e
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• pp.121-123
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• 2005

In a poor economic situation, electrical contracting business face many difficulties by means of a keen competition and a sudden change of a policy issue although it is the basis of a national industry. Therefore, the fact is that we are in need of professional management structure for planing a systemic and continuos development of electrical contracting business operation. Moreover, we consider a necessity of medium which give a general flowchart to a person who get ready to go into the electrical contracting business market. However, these research haven't been achieved yet. We would like to introduce electrical contracting management guide which was published in america by translating into korean and we expect that it laid the foundations of research activities.

• Proceedings of the KIEE Conference
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• 2005.07e
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• pp.43-45
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• 2005

Electric accidents, like getting electrified, sometimes happen to people working on electricity. A highly probable reason why these electric accidents happen is that workers are used to skip confirming disconnection of electricity when they work. It is mostly because they have little understanding of electricity. To overcome this, various applications such as 'electric detecting stick' are invented to check existence of electricity on working environment. But, they have not been popular due to inconvenience of carrying. So, we made a new instrument. It is a kind of nipper on which electric detecter is installed. Detecting existence of electricity is less burdensome via this tool we made.

• Proceedings of the KIEE Conference
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• 2005.10a
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• pp.158-160
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• 2005

Electric accidents, like getting electrified, sometimes happen to people working on electricity. A highly probable reason why these electric accidents happen is that workers are used to skip confirming disconnection of electricity when they work. It is mostly because they have little understanding of electricity. To overcome this, various applications such as I electric detecting stick' are invented to check existence of electricity on working environment. But, they have not been popular due to inconvenience of carrying. So, we made a new instrument. It is a kind of nipper on which electric detecter is installed. Detecting existence of electricity is less burdensome via this tool we made.

• Proceedings of the KIEE Conference
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• 2003.07a
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• pp.148-150
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• 2003

A meaning of power quality has changed, which affects on an environmental change of existing electricity supply markets. Today, it should take both consumers and suppliers into consideration to develop information and communication technology and to increase the use of power and electronic equipments. As a result, it is necessary to develop a system to monitor power quality and to display data. In this paper, a system, as a power quality monitoring equipment, which can use protective replays with progress of microprocessor technology and provide information in the intranet/internet circumstances using web-based architecture is described.

• JOURNAL OF ELECTRICAL WORLD
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• s.312
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• pp.74-80
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• 2002

전력자유화를 앞두고 전력회사의 e비지니스에 대한 대처가 가속화되고 있다(전력관계 e비지니스를 전력e비지니스라 함). 사외전자거래, 고객서비스에서부터 새로운 사업에 이르기까지 광범위한 영역에서 인터넷의 활용이 넓어지고 있으며, 앞으로 더욱 진전될 전망이다. 본고에서는 전력자유화 시대를 위한 IT(Information Technology)를 활용한 전력e비지니스의 개요와 IT솔류션의 제공에 필요한 요소기술에 대하여 소개한다. 전력자유화를 위해 전력회사는 전력사업에서 종합에너지사업, 그리고 신규사업의 기업가치 증대를 위해 노력하고 있다. 이러한 대처노력에 대해 경영개혁$\cdot$업무개혁$\cdot$IT기술 등을 융합하여 기업컬래버레이션을 실현하는 토털솔류션이 요구되고 있다. 또한 전력회사에서는 전력e비지니스의 일환으로서 전자상거래 전자신청 등의 B2B 비지니스와 그것들을 지탱하는 PKI(Public Key Infrastructure : 공개건(키)기반), 시큐어리티 비즈니스 등의 시큐어리티 인증비지니스가 주목을 받고 있다. 또 기반을 지탱하는 데이터 솔류션 비즈니스에 대해서도 비즈니스기반이 정비되어 업무시스템 개혁 및 신규비지니스로 이용될 수 있게 되었다. 이러한 동향을 기초로 Web시스템 구축 기반기술, 시큐어리티 기반기술을 토대로 하여 시스템연대 기반기술, 데이터 교환공유 기반기술, 데이터분석 기반기술, 멀티미디어정보 기반기술, 개발지원 기반기술을 통합하여 IT솔류션으로 제공함으로써 전력e비지니스의 토털솔류션 제공의 가속화를 도모하고 있다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2012.07a
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• pp.411-412
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• 2012

본 논문에서는 인간의 가장 기본적이며 기초적인 운동인 걸음걸이로부터 검출할 수 있는 걸음 수 및 보행분석을 위해 전도성 섬유를 이용한 전기용량성압력 센서를 깔창형태로 개발하였다. 개발된 깔창 형태의 센서는 보행시의 압력을 측정하여 보행신호를 검출하고, 검출된 신호를 이용하여 걸음 수 및 보행 분석을 실시하였다. 개발된 센서의 성능 검증을 위하여 상용 만보계 및 관찰자의 수계로 도출된 보수를 비교하였으며, 자세에 따른 압력차이를 측정하였다. 기존의 상용 만보계는 저속(1 Km/h)으로 걸었을 때 보수가 잘 측정되지 않은 반면 개발된 센서는 저속에서도 관찰자 수계대비 정확한 보수를 도출 할 수 있었다. 또한 자세에 따라 압력 값을 토대로 사용자의 자세를 모니터링 할 수 있음을 보였다. 본 연구는 향후 스마트폰과 무선 연동하는 스마트 보행관리 시스템을 개발하기 위한 기초연구이다.

• 전기의세계
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• v.28 no.9
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• pp.43-50
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• 1979

Silicon nitride films were chemically deposited on silicon substrates by reacting SiCl$_{4}$ and NH$_{3}$ in a nitrogen atmosphere at 700~1100 .deg.C. The deposition rate increased rapidly with deposition temperature upto about 1000 .deg.C, and became less temperature dependent above this temperature. The etch rate of films in buffered HF solution decreased, with an increase of deposition temperature, and a heat treatment at a temperature higher than that of the deposition considerably reduced the etch rate. It indicates that the heat treatment resulted in a densification of the films. Surface charge density of 3~4 * 10$^{11}$ /cm$^{2}$ was determined from the C-V characteristics of MNS diode, and it was also found that surface charge density depended on deposition temperature, but not film thickness. The current-voltage characteristics displayed a logI-V$^{1}$2/ dependence in the temperature range of 300~500.deg.K. Measurement of the slope of this characteristics and its dependence on temperature and bias polarity suggest that conduction in sili con nitride films arises from the Poole-Frenkel mechanism.

• 전기의세계
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• v.27 no.6
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• pp.49-53
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• 1978

This paper investigates on the electric input characterisitcs of plasma electron beam in H$_{2}$ gas chamber with various pressures, effected by the shape and dimension of hollow screen cathode during electron beam is formed. The result are as follows: (1)Electron beam is formed in the region of positive resistance on the characteristic curve which shows the relation between the voltage and current of electron beam, independent of the shape and dimension of hollow screen cathode. (2)At a given electron beam current, electron beam voltage increases with the decreases of hollow screen cathode length and screen mesh number of it. (3)At a given electron beam current, electron beam voltage increases with the diameters of hollow screen cathode and electron beam hole of it.

• The Transactions of the Korean Institute of Electrical Engineers B
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• v.48 no.10
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• pp.523-529
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• 1999

In the case of the large power transformer, the grain-oriented material is usually used. So, to obtain more accurate results, anisotropy and non-linearity of the material must be considered. The Newton-Raphson(NR) method is generally used for analyzing these non-linear properties, but it consumes so much time, especially when the number of nodes is large or the shape of the model is complex. The transmission line modeling (TLM) method is successfully adopted to the analysis of non-linear properties with FEM, but it has not been adopted to the analysis of the anisotropic material. In this paper, the formulation of the TLM method considering anisotropy is developed and the adoption to the 3-phase transformer is presented.

• The Transactions of the Korean Institute of Electrical Engineers B
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• v.51 no.2
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• pp.92-98
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• 2002

It is necessary to measure the solar cell parameter fur understanding characteristic of solar cell and applying to many other fields. Since photovoltaic system consists of solar cell module, which are connected each other in series and parallel, it is not proper to apply a solar cell parameter to photovoltaic system. Therefore, to estimate the solar tell module and to solve the problem of the established algorithm is on demand. In this paper the authors have improved the accuracy of solar cell module Parameter estimation by compensating series and Parallel resistance, and developed a new parameter estimation algorithm, which can be applied to photovoltaic system without high cost measuring equipment. And the validity of proposed algorithm is verified by the simulation and experimentation.