• Journal of the Korean Professional Engineers Association
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• v.28 no.3
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• pp.31-43
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• 1995

• JOURNAL OF ELECTRICAL WORLD
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• no.7 s.139
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• pp.27-31
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• 1988

• Korean Architects
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• no.4 s.157
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• pp.29-31
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• 1982

• Journal of the Korean Professional Engineers Association
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• v.7 no.27
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• pp.8-13
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• 1974

• Proceedings of the KSME Conference
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• 2001.06d
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• pp.104-109
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• 2001

The time to measure the size distribution using Condensation Nuclei Counter(CNC) and Differential Mobility Analyzer(DMA) can be shortened by classifying particles ramping the DMA voltage exponentially and continuously. In measurement, particles sampled at different time are mixed together going through sampling tube and CNC. Because the size distribution is inversed by using detector responses to sampling time intervals in this accelerated method, the mixing effects give inversion errors to the size distribution. The mixing effects can be considered by appling the transfer function with mixing effects to the data inversion. The inversion considering this effects gives birth to the size distribution shifted to the opposite direction of the size scanning.

• Journal of the Korean Society of Safety
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• v.8 no.3
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• pp.91-104
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• 1993

This paper is on the current and prospect of the most advanced explosive technics, special explosive technics. Futhermore, utmost needed and utmost centered interesting basic theory, struction explosive demolition is descirbed with counter Plan on the Problems of carrying out example and cuf out of it. Specified description noted on the four pollution especially noisy vibration, dust and disperse pollution with comprehensive counter plan. Although it has some insufficiency. I expect my paper will be to advance the explosive technics.

• Explosives and Blasting
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• v.11 no.4
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• pp.9-27
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• 1993

This paper is on the current and prospect of the most advanced explosive technics, Futhermore, utmost needed and centered interesting basic theory, The demolition is described with counter plan on the problems of carrying out example. Specified description noted on the pollution especially noisy, vibration, dust and disperse pollution with comprehensive counter plan. Although it has some insufficiency, 1 expect my paper will be to advance the explosive technics.

• Proceedings of the KIEE Conference
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• 1989.11a
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• pp.75-78
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• 1989

Insulation of P.E insulated cable under the field of high-voltage will be breakdown ultimately due to the degradation process called 'Treeing' which is generated in the insulation, so long as any counter-measure suppressing or eliminating it could not be provided. In this paper as a counter-measure Dodecyl Alcohol is mixed with P.E and Treeing under the temperature variation has been observed. Results show that the larger weight ratio of Dodecyl Alcohol is stronger the effect of suppressing Tree ing in the range from room temperature to 40$^{\circ}C$ and generated Treeing has been soon eliminated and it never again generated.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.26 no.11
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• pp.999-1011
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• 2015

In modern electronic warfare, RADAR is under constant threat of ECM(Electronic Counter Measures) signals from nearby jammers. The conventional linear frequency modulated(Linear-FM) waveform is easy to be intercepted to estimate its signal parameters due to its periodical phase transition. Recently, APCN(Advanced Pulse Compression Noise) waveform using random amplitude and phase transition was proposed for LPI(Low probability of Intercept). But random phase code signals such as APCN waveform tend to be sensitive to Doppler frequency shift and result in performance degradation during moving target detection. In this paper, random phase and code rate transition based radar waveform(RPCR) is proposed for Doppler tolerance improvement. Time frequency analysis is carried out through ambiguity analysis to validate the improved Doppler tolerance of RPCR waveform. As a means to measure the vulnerability of the proposed RPCR waveform against LPI, WHT(Wigner-Hough Transform) is adopted to analyze and estimate signal parameters for ECCM(Electronic Counter Counter Measures) application.

• International Commerce and Information Review
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• v.4 no.1
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• pp.69-86
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• 2002