• Nuclear Engineering and Technology
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• 제26권1호
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• pp.100-107
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• 1994

가압경수로용 핵연료붕 내압을 계산하는 데 있어 현재의 결정론적 방법에 의한 과다한 보수성을 줄이기 위하여 통계적 계산 방법론을 개발하였다. 개발된 통계적 방법론은 반응표면 분석 방법과 Monte Carlo 계산 방법을 이용하였다. 반응표면 분석 방법을 이용하여 핵연료 제조관련 변수와 성능관련 변수를 고려하여 회귀식을 유도하였으며, 이 식의 검증은 F-test, $R^2$ 및 $C^{p}$-test 방법을 사용하여 수행하였다. 회귀식으로 부터 예측된 봉내압은 결정론적 방법을 사용하여 계산된 값과 잘 일치하였다. Monte Carlo 계산으로 구한 핵연료봉 내압의 분포는 거의 정상분포로 나타났다. 본 연구에서 개발된 통계적 방법론으로 구한 95/95 봉내압과 현재 사용되고 있는 결정론적 방법론의 봉내압과 비교한 결과 결정론적 방법론의 과다한 보수성을 크게 줄일 수 있었다.다.

• 한국지역지리학회지
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• 제10권1호
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• pp.96-109
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• 2004

지방자치단체의 역할이 커지면서 도시마케팅에 대한 관심이 증대하고 있는 시점에서 본 연구는 대구시를 중심으로 도시이미지를 측정하고 분석하였다. 국가이미지의 개념을 응용한 본 연구는 2 단계로 구성되었다. 연구 1에서 대구와 서울지역의 대학생들을 대상으로 대구시 및 서울시의 도시이미지를 측정하여 도시이미지 차원을 도출하고 각 도시 이미지를 비교하였다. 연구 2에서는 대구 경북과 서울 경기 지역민들을 대상으로 대구시의 도시이미지 차원을 검정하고 거주지역과 인구통계적 특성에 따라 차이가 있는지 분석하였다. 연구 1에서 경제수준, 시민성, 보수성, 발전가능성의 4 차원으로 추출된 도시이미지는 연구 2에서 검정되었다. 대구시의 이미지는 보수성이 가장 높고 경제수준이 가장 낮은 것으로 인식되었는데, 연구 1의 결과 보수성과 시민성에서 서울시보다 높고 경제수준에서 더 낮은 것으로 인식되었다. 연구 2의 결과 거주지역에 상관없이 고소득, 고학력, 미혼, 젊은 층은 대구시의 이미지를 보수적이며, 시민성과 발전가능성은 낮은 것으로 인식하여 부정적으로 지각하고 있는 것으로 나타났다. 또한 2 단계 모두에서 대구지역 응답자가 서울지역 응답자보다 대구시의 이미지에 대해 보다 부정적이었다.

• 한국의상디자인학회지
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• 제16권1호
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• pp.77-89
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• 2014

This study looked into the effect of the life style of single females in 20s and 30s on beauty behavior recognition, and spss 17.0 is used for data analysis method. As for the statistical analysis method in order to validate the measurement tools, reliability verification is conducted and life style groups are sampled using K-means taking into account factor scores by life style. To find out the difference between general beauty behavior recognition and life style, descriptive statistics and One Way ANOVA were carried out, and Duncan Test was implemented for the post examination method. Multiple regression analysis was also carried out to figure out the effect of life style on beauty behavior recognition. The result is as follows. First, according to the results of reliability verification and factor analysis for the lifestyle type and the recognition of the behavior for beauty, the types of the life style of the subjects were divided into Economic Utility, Convention Conservatism, Self Development, Showy Consumption, and Appearance Oriented, and the recognition of the behavior for beauty was named as Makeup and Hair, Cosmetic Surgery, Body Care, and Skin Care. Second, as to the recognition of the behavior for beauty based upon the lifestyle, the Appearance Oriented in Showy Consumption recorded the highest. Third, the analysis of the influence of the style on the recognition of the behavior for beauty showed that the behavior recognition for Makeup and Hair and for Skin Care was affected by the life style of Self Development, Showy Consumption, and Appearance Oriented; the behavior recognition for Cosmetic Surgery was affected by the life style of Conventional Conservatism, Showy Consumption, and Appearance Oriented; and again the behavior recognition for Body Care was by that of Economical Utility and Showy Consumption.

• 한국지진공학회논문집
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• 제5권5호
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• pp.47-56
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• 2001

원전 격납건물은 내진 안정성을 확보하기 위해 설계단계에서 여유나 보수성을 부여하게 된다. 원전 구조물의 내진성능 평가는 이러한 여유나 보수성을 배제한 실질적인 성능 및 응답을 기준으로 평가하게 된다. 본 연구에서는 내진성능 평가에 고려되는 구조물의 성능 및 응답관련 계수들 중 그 기여도가 비교적 큰 비탄성 에너지 흡수계수의 산정방법에 대한 비교를 수행하였다. 또한 각종 방법에 따라 산정된 비탄성 에너지 흡수계수에 따른 HCLPF(high confidence of low probability of failure)값의 변화를 분석하였다. 연구결과 원전 격납건물의 비탄성 에너지 흡수계수는 1.5~1.75로 나타났다. 구조물의 내진성능을 명확히 평가하기 위해서는 먼저 구조물의 비선형 거동 및 연성도를 정확히 평가하여야 함을 알 수 있다.

• Nuclear Engineering and Technology
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• 제47권2호
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• pp.204-211
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• 2015

Probabilistic safety assessment (PSA) has had a significant role in quantitative decision-making by finding design and operational vulnerabilities and evaluating cost-benefit in improving such weak points. In particular, it has been widely used as the core methodology for risk-informed applications (RIAs). Even though the nature of PSA seeks realistic results, there are still "conservative" aspects. One of the sources for the conservatism is the assumptions of safety analysis and the estimation of failure frequency. Surveillance, diagnosis, and prognosis (SDP), utilizing massive databases and information technology, is worth highlighting in terms of its capability for alleviating the conservatism in conventional PSA. This article provides enabling techniques to solidify a method to provide time- and condition-dependent risks by integrating a conventional PSA model with condition monitoring and prognostics techniques. We will discuss how to integrate the results with frequency of initiating events (IEs) and probability of basic events (BEs). Two illustrative examples will be introduced: (1) how the failure probability of a passive system can be evaluated under different plant conditions and (2) how the IE frequency for a steam generator tube rupture (SGTR) can be updated in terms of operating time. We expect that the proposed model can take a role of annunciator to show the variation of core damage frequency (CDF) depending on operational conditions.

• 패션비즈니스
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• 제9권2호
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• pp.84-99
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• 2005

This is a study about the fashion value of generation y, those who were junior and high school students between 1990 and 2004 in the U. S. This study was mainly based on the street culture and fashion of American teenagers the author observed in New York from 1997 to 2004, and referred to articles carried by major American journals, the result d Census 2000, statistical data reported by well-credited American research institutions. To overview the values generation y applies to their fashion, this study picked 8 principal values generation y pursues in their fashion and put them in four sets of contrasting pairs, as in conformity vs. Individuality, authenticity vs. trendiness, comfort vs. sexuality, rebelliousness vs. conservativeness. The results are as follow. First, when it comes to fashion, generation y desires to be noticed by others, but is afraid d being too different from their peers. Second, generation y stresses authenticity in their fashion. But, they are very much interested in mass fashion trend as well, and the pursuit of authenticity itself can be just a trend. Third, generation y wants their fashion to be "not only sexy and feminine, but also sporty and athletic" all at the same time. Forth, generation y uses fashion to visualize their rebelliousness. But their rebellious spirit is diluting amid the rise of neo-conservatism. As a conclusion, generation y's fashion has changed the way that compromises contrasting values, and in the process, were created unique new styles.

• 한국전산구조공학회논문집
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• 제34권5호
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• pp.309-317
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• 2021

이 논문에서는 박스형 전력구의 지진응답해석에 사용되는 응답진도법의 보수성을 평가하였다. 이를 위해 25가지 전력구 단면과 각 전력구에 대한 2개의 지반조건을 고려한 총 50개 예제를 선정하였다. 응답진도법의 보수성을 평가하기 위해 동적 지반-구조물 상호작용을 고려한 정밀해석법에 의한 응답과 비교하였다. 비교결과, 정밀해석 응답에 대한 응답진도법에 의한 응답의 비로 정의한 응답비의 평균이 1.0에 근접하며, 응답비의 표준편차도 5% 이내로 매우 작아서, 응답진도법에 의한 해석이 정밀해석법과 일관됨을 알 수 있었다. 마지막으로 응답진도법에 의한 응답에 하중계수 1.1을 적용하면 전력구의 보수적인 내진설계가 가능할 것으로 나타났다.

• 한국의류학회지
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• 제21권6호
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• pp.988-1002
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• 1997

The objectives of this study are to consider about the research of a costume and a discussion about a system of costume by practical science scholar in the late period of Chosun Dynasty. The result are descrived as follows: 1. The purpose that practical sciellce scholars researched a costulne was not only the intellectual research but also to make a basis in order to reform a uncorrected costume's system. Their study had two point. The one was the investigating research about the origin and change of the costume. The other was the study about a formation of costume. 2. The practical science scholars determined the directions to reform a wrong costumes' system on the basis of the research about a costume. They had three directions. Those were a conservatism, a rationalism to think the realities of life and a reformation. 3. The practical science scholars' thinking was to pursue the origin form and the practical use. This two axis show the direction to improve our costulne's culture now a day.

• 한국농촌건축학회논문집
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• 제6권1호
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• pp.1-12
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• 2004

This study is for figuring out the relationship between the transition of the religious outlook and the design of worship space in Korean churches after the year of 2000. Analyzing the design samples of worship spaces which are appeared in architectural and interior design publications, it is found out that the modernity in architectural and interior design is presented in many worship spaces. And the progressive effort for the renewal of the worship service is projected to composition of the pulpit and others. But the conservatism of the Korean church has not been eliminated yet. These phenomena are considered to be same in the most cases of rural community church.

• International Journal of Costume and Fashion
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• 제17권1호
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• pp.29-39
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• 2017

This study seeks to understand the consumer meanings of wearing classic styles. A qualitative research method was adopted, and 16 participants in the United States were interviewed and asked to define a classic fashion or style and why they wear one. Grounded theory was used for the research. The findings revealed three themes: (1) A classic style represents conservatism in style; (2) Style pragmatism refers to the positive attributes of wearing a classic style; and (3) consumers expect to continue to wear that classic style in the future. Those who are fashion-forward also expect to wear classic clothing in the future as they grow older. For people who do not follow fashion, classic is also a safe choice. The implications of these findings are discussed.