• Journal of the Korean Home Economics Association
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• v.32 no.1
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• pp.133-150
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• 1994

This study was a survey of the taste for color arrangement and the relation to taste with food color. The term of investigation and object was the same as before mentions. The data-treatment was determinded by frequence percentage chi-square and F-test as measured by SAS program for PC and statistical figures were obtained by GDAS. The results were as follows;1. In the taste of arrangement for food, color. The most frequent colors were green and white followed by a yellowish green red. In preference 50's object was difference from another aged. It's significance was showed orange yellow pink and white. 2. In the relation of food color and taste term the color shown a pungent sweet hot and delicious taste was red and a sour astringent sweet taste was orange and anastringent bitter delicate hard taste was brown and a proteiny sofe sweet delicate taste was yellow and a cool taste was yellow and a cool taste was green, and a cool, bitter taste was blue and an astrngent taste was pink, and a bitter hard, tasteeless taste was black and a proteiny sofe taste was white. But in the case of any a bitter taste it's significance was shown.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2003.05a
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• pp.236-243
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• 2003

본 연구의 목적은 수작업 반복성 평가의 체계적인 연구를 위해 최근 5년간의 반복성에 관한 기존 연구 30여 편을 중심으로 반복성 평가 방법들을 조사하여 비교 분석하는 것이다 기존연구들의 비교 분석 결과, 평가하고자 타는 반복성의 근본적인 이해가 부족하여 반복성 정의에 대만 일관성이 없을 뿐만 아니라 반복 수준의 구분 기준에 대한 척도간 비교가 어렵고 결과의 일관성도 없었다. 본 연구에서는 기존 연구들의 무분별만 평가로 인한 문제점을 해결하기 위하여 시간(time)과 빈도수(frequence)를 기준으로 타는 평가 적도의 새로운 분류 체계를 제안하였다. 마지막으로 평가 적도의 측정과 분서에 사용되는 방법들을 조사하여 정리하였다. 본 연구의 결과는 수작업의 반복성 평가를 위한 척도의 사용지침을 제공할 뿐 아니라 추후 반복성 평가의 체계적인 방법론을 구축하는데 근간이 될 수 있을 것이다.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 1997.04a
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• pp.41-45
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• 1997

To design a control system, it is a elementary point that the stability of the system should be guaranteed. Also, the phase of the system plays an important role for its frequence performance. In this paper, we present two stability criterion of repetitive control system with phase-lead and lag compensator. First, the stability criterion for the servo control system with phase-lead and lag compensator is shown by using small-gain theorem. Second, for the repetitive control system with the compensator, the stability criterion, also, is determined by using small-gain theorem. Two stability criterions show the same results that the stability depends on a coefficient of the phase-lead and lag compensator under some condition in servo control system and repetitive control system.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2001.05a
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• pp.1210-1216
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• 2001

The impinging tones by high-speed plane jets are investigated for the characteristics of edgetone generation based on experimental observations. Experiment has been performed for edgetones with a slit nozzle and a wedge system. The jet in the experiment is varied from low to high subsonic speed to obtain the effect of the speed on the frequency characteristics of impinging tones. The experimental data obtained previously for edgetones and platetones by various nozzles are compared with the present edgetone data for the condition of tone generation, the frequency ranges and the effective source point. It is found that the jet speed has no fundamental influence on the impinging tone characteristics. Regardless of the jet speed, the effective source point is about a quarter wavelength downstream from the edge tip. With increase in jet speed, the influence of the nozzle configuration is decreased and the operating frequencies show good coincidencies by normalized parameters based on the slit thickness.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 1992.11a
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• pp.11-13
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• 1992

The dielectric reliability of the Thin $SiO_2$ films of wet oxidation on n-type Si substrates has been studied by using self-healing method of breakdown and according to injection time high frequence C-V tests. These experiments have been performed to investigate the dielectric breakdown mechanism of a thin film in which positive charge generation during high-field Fowler-Nordheim tunneling are considered. In addition, The weak spots and robust areas are distinguished so that the localized dielectric breakdown could be described.

• Proceedings of the KIEE Conference
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• 2015.07a
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• pp.426-428
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• 2015

The NGK suspension insulators are subjected in harsh environments in service above 40 years long time. The long term reliability of the insulators is required for both mechanical and electrical performances. This study describes some electrical performances according to KEPCO-standard. There was fail in electrical and mechanical performance test such as galvanizing, low-frequence wet flashover voltage, puncture and combine mechanical & electrical strength test. The NGK suspension insulators of 1968 were shown lower electrical and mechanical performance than those of 1979.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.2 no.2
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• pp.75-83
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• 2003

Recently, the machine tools have been needed for high speed and accuracy to increase productivity. The most Important thing to get a more stabilized machine is to know the frequency response which has an effect on manufacture a lot. This problem should be considered seriously by many researchers. There are many application programs about FEM but Just using FEM program to get information of the object is not enough to put our confidence in the stability of the machine tool design. Therefore, the purpose of this research is to make a study for proving one of the ways to design to produce stabilized a machine more efficiently by comparing FRT method and FEM. At these two tests, we can learn about the frequency response area causing resonance and we can reconfirm the result to trust.

• Journal of Korea Multimedia Society
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• v.21 no.4
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• pp.493-498
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• 2018

In this paper, we provide the performance analyses of a dual-hop amplify-and-forward(AF) relay transmission composed of asymmetric radio-frequence(RF) and free-space optical(FSO) links. In the mixed RF/FSO system, a relay is equipped with two receive antennas for RF signals and one additional transmit antenna for FSO signals. In order to improve a performance of RF link, a switch-and-stay (SSC) diversity technique is applied at the relay which can provide a proper link performance with a low complexity. Specifically, we offer the performance analyses of the proposed system in terms of outage probability and secrecy outage probability. In numerical examples, we compare the system performances with no diversity and selection combining systems and verify our analytical results via computer-based Monte-Carlo simulations.

• The Research Journal of the Costume Culture
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• v.15 no.1 s.66
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• pp.169-178
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• 2007

The purpose of this study was to compare consumers' post acquisition behavior by analyzing the influence of familiarity of jeans, and pursued image. The data was collected by using survey, three stages of pre-tests, and main survey conducted in the U.S and Korea. A total of 520 participants from each country(260 males and 260 females) was used. The results of this study is as follows. Familiarity of jeans and pursued image of jeans wear were compared between Korean and American students. As a result, there was difference between the countries on familiarity that the U.S showed higher familiarity, frequence of wearing and owned quantity. Pursued image was consisted of unique factor and activity factor and Korean students showed higher score on pursuing individualistic image. The results of this study would provide marketing strategy for fashion marketers of global jean brands.

• Proceedings of the KIEE Conference
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• 2002.04a
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• pp.183-185
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• 2002

This paper proposes the test method for the testing of a RLC parallel circuit on the electronic circuit board. This method utilizes a guarding circuit and a phase detection circuit. The guarding circuit separates electrically the tested device or circuit from printed circuit board. Phase detector estimates the phase difference from two signals, voltage and current. This method computes R. L and C value from phase difference($\theta$) and impedance value(Z) obtained by enforcing two other frequence stimulus under the guarding state.