• Journal of the Korean Data and Information Science Society
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• 제17권3호
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• pp.933-943
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• 2006

For multiply Type-II censored samples from two-parameter Rayleigh distribution, we derive some approximate maximum likelihood estimators of parameter in the Rayleigh distribution when the other parameter is known. We also compare the proposed estimators in the sense of the mean squared error for various censored samples.

• Journal of the Korean Data and Information Science Society
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• 제18권3호
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• pp.817-826
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• 2007

In this paper, we derive the approximate maximum likelihood estimators of the scale parameter and the location parameter in a generalized extreme value distribution under multiply Type-II censoring by the approximate maximum likelihood estimation method. We compare the proposed estimators in the sense of the mean squared error for various censored samples.

• 한국의류학회지
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• 제36권8호
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• pp.791-801
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• 2012

We performed an assessment of wearing, purchasing, satisfaction, and the fit of brassieres according to body and breast type for college women to provide basic data on the manufacture of an ergonomic brassiere. The classifications of domed and conical breast type or projecting and conical breast type were unclear. Flat breast were dissatisfied with the shape of small and flat, and drooping breast were dissatisfied with the shape of big, projected, and drooping. In purchasing a brassiere, the majority of subjects were ignorant of their brassiere size, and over 80% of the subjects bought a brassiere without trying it on. Over 50% of those surveyed said they found it difficult to buy a well-fitted brassiere, particularly for the flat and drooping breast type. Over 70% of those surveyed wore a brassiere of 3/4 cup size, the slim body type wore a brassiere of 1/2 cup size; however, the obese body type wore a brassiere of full-cup size. The flat-breast or slim-body wore a brassiere of a thick pad type but projecting-breast or drooping breast wore brassiere of a thin pad type. Many of the subjects wore an unfitted brassiere in cup size and under bust size. In the classification of breast type, there were slight differences between the breast type that they recognized and the breast type that they were shown. There were distinctions in function, satisfaction, and fitness based on breast type. Therefore, the development of an ergonomic brassiere should considered the characteristics of breast type for fitness and comfort.

• 컴퓨터교육학회논문지
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• 제22권3호
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• pp.79-87
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• 2019

본 연구는 이중부호화, 매체풍부성, 인지부하의 정도가 다른 e-러닝 콘텐츠가 학습에 미치는 영향을 살펴보고자 실행되었다. 이를 위해 e-러닝 콘텐츠의 학습내용 요약과 설명의 정보제시방식을 정보 양과 종류에 띠라 분류한 후, 교수실재감과 학업성취도에 미치는 영향을 살펴보았다. 요약 제시방식은 텍스트형과 텍스트+그림형으로, 설명 제시방식은 음성형과 음성+영상형으로 구분하였다. 본 연구의 결과는 다음과 같다. 첫째, 요약방식 중 텍스트+그림형의 교수실재감이 텍스트형보다 의의 있게 높았다. 둘째, 설명방식 중 음성형의 학업성취도가 음성+영상형보다 의의 있게 높았다. 셋째, 요약방식과 설명방식 간에 교수실재감과 학업성취도에서 유의미한 상호작용이 있었다.

• Journal of the Korean Society for Industrial and Applied Mathematics
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• 제15권4호
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• pp.277-290
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• 2011

We define some multi-type asset models derved from L$\acute{e}$vy proceses which emphasize coefficients of stochastic differential equations. Also these asset models can be represented by Doleance-Dade linear equations derived from jump-type semimartingales which are decomposed by various terms of time basically. For these asset models, we can construct optimal portfolio strategy by using filtered various information at each check time.

• Journal of the Korean Data and Information Science Society
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• 제18권3호
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• pp.793-801
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• 2007

For multiply Type-II censored samples from a half-triangle distribution, the maximum likelihood method does not admit explicit solutions. In this case, we propose some explicit estimators of the location parameter in the half-triangle distribution by the approximate maximum likelihood methods. We compare the proposed estimators in the sense of the mean squared error for various censored samples.

• Journal of the Korean Data and Information Science Society
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• 제25권3호
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• pp.643-653
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• 2014

In this paper, we propose some estimators for the extreme value distribution based on the interval method and mid-point approximation method from the progressive Type-I interval censored sample. Because log-likelihood function is a non-linear function, we use a Taylor series expansion to derive approximate likelihood equations. We compare the proposed estimators in terms of the mean squared error by using the Monte Carlo simulation.

• 한국엔터테인먼트산업학회논문지
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• 제13권3호
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• pp.43-54
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• 2019

본 연구는 인터넷 뉴스에 보도된 작은 결혼식의 특성을 분석하고, 활성화 방안을 제시하는데 목적이 있다. 자료는 2012년부터 2018년까지 인터넷 뉴스 248개이며, 빈도분석과 카이제곱 검정을 실시하였다. 연구결과는 다음과 같다. 절약형은 2016년에, 축의금 개선형은 2015년에 많은 비율로 보도되었다. 작은 결혼식 장소로 절약형과 무료형은 공공기관을, 소규모형은 호텔을, 특색형은 야외와 하우스를, 축의금 개선형은 호텔과 공공기관이 많이 보도되었다. 절약형, 특색형과 무료형은 정보전달로 많이 보도되었으며 소규모형과 축의금 개선형은 사례 유형으로 많이 보도되었다. 사례는 공공기관과 호텔을, 정보전달은 공공기관을 작은 결혼식 장소로 많이 보도되었다. 사례와 정보 전달은 호의적인 비율이 높고, 의견은 호의적인 비율과 비호의적인 비율이 유사하게 보도되었다. 일반인은 절약형, 유명인은 소규모형으로 보도되는 비율이 많았다. 또한 일반인은 공공기관을, 유명인은 호텔을 작은 결혼식 장소로 보도되는 비율이 많았다. 작은 결혼식에서 비용을 절약한 항목은 장소 대여 비용, 피로연 비용, 예복 비용, 화환/장식 비용, 사진 촬영 비용 등이 많았으며 혼수나 예단, 주택, 예물에 대한 비용을 절약한 비율은 적었다.

• 한국정보통신학회논문지
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• 제3권2호
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• pp.447-453
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• 1999

In MHD power generation system, enthalpy of the working gas is convened to electric power directly through expansion in generator channel. It means that electric power can be generated without a moving mechanical linkage such as turbine blades. The principle of MHD generation is based on Faraday'law of induction that eletromotive force(u$\times$B) is generated when the working gas of velocity u flows a channel in which magnetic field of strength(B) exists. In this paper, helium gas seeded with cesium is used as working gas. There are two types of generator in MHD generation; linear type faraday and disk type hall generator. Rogowski coils having the bandwidth of the 100(Hz) ~ 20(kHz) were used for measuring current flowing MHD disk channel. Optimum load resistor value of the MHD generator studied was 2.5[$\Omega$]. Disk type hall generator's generation performance is the main target of this paper, which superiors to linear type Faraday generator in many points. Isentropic efficiency and enthalpy extraction rate of disk type shock tube driven hall generator is discussed here.

• 한국컴퓨터정보학회논문지
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• 제24권6호
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• pp.141-149
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• 2019

This study was attempted to contribute to enhancing the quality of practical education by using Q-methodology to find out how nursing students cope with a mistake during clinical practice. From October 3rd to 26th, 2016, 30 Q-statements were selected through in-depth interviews and prior papers to identify response patterns for mistakes in the 3rd to 4th grade of the Department of Nursing at K University. The analysis using the QUANL program has four types. the first type was named the frankness type, the second type was named the forwardness type, the third type was named the evasion type, the fourth type was named the anxiousness type. In this paper we proposed that the practical guidance instructor and the field instructor need to understand the individual recognition style of each student and to develop coping strategies considering the individuality and to cooperate with education and guidance. In addition, in order to establish a positive cognitive formation and coping method in case of a mistake, it is necessary to educate management about mistakes in systematic nursing student clinical practice.