• Steel and Composite Structures
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• 제11권2호
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• pp.115-130
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• 2011

Considering the randomness of material parameters in the laminated composite plate, a scheme of stochastic finite element method to analyze the displacement response variability is suggested. In the formulation we adopted the concept of the weighted integral where the random variable is defined as integration of stochastic field function multiplied by a deterministic function over a finite element. In general the elastic modulus of composite materials has distinct value along an individual axis. Accordingly, we need to assume 5 material parameters as random. The correlations between these random parameters are modeled by means of correlation functions, and the degree of correlation is defined in terms of correlation coefficients. For the verification of the proposed scheme, we employ an independent analysis of Monte Carlo simulation with which statistical results can be obtained. Comparison is made between the proposed scheme and Monte Carlo simulation.

• 한국패션뷰티학회지
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• 제6권1호
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• pp.48-52
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• 2008

The purpose of the study is to look at the middle and high school student's recognition of beauty Arts. The collected data were analyzed by frequency analysis, factor analysis, reliability test, t-test, correlations analysis, from which the result is as follows. Firstly, the lower levels of beauty art are comprehensive interest, personal interest professional interest, effort type, management type and consumption type. Secondly, Beauty art interest and attitude by gender and school levels showed meaningful difference. Thirdly, there is meaningful correlations between beauty art interest and beauty art attitude.

• 유체기계공업학회:학술대회논문집
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• 유체기계공업학회 2000년도 유체기계 연구개발 발표회 논문집
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• pp.110-115
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• 2000

The mean streamline analysis using the empirical loss correlations has been developed for performance prediction of industrial mixed-flow fan impellers in the present study. New simple, but effective, models for the additional Euler input work characteristic and an internal recirculation loss due to internal flow reversal under the low flowrate conditions are proposed in this paper. Comparison of overall performance predictions with six sets of test data of mixed-flow fans is accomplished to demonstrate the accuracy of the proposed models. Predicted performance curves by the present set of loss models agree fairly well with experimental data for a variety of mixed-flow fan impellers over the entire operating conditions. The prediction method presented herein can be used efficiently in the conceptual design phase of mixed-flow fan impellers.

• 복식
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• 제47권
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• pp.47-60
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• 1999

The purpose of this study was to investigate relationship between individualism collectivism clothing behaviors and clothing purchasing motives among high school students and the difference of individualism collectivism clothing behaviors and clothing purchasing motives according to demographic variables. And we also took a close look at how they turned out in their actual clothes-buying. The questionaire survey was used toward 55 high school students in seoul region during October 1998. SAS package program were used to analyze the gatherd data. Frequency Percentage Factor Analysis Duncan test Correlation Analysis and so on. The conclusion based on the results are as follow; 1. The analysis of correlations among individualism collectivism clothing behaviors and motivations showed that there are significant correlations among them 2. There are significant differences in individualism collectivism clothing behaviors and clothing purchasing motives according to demographic variables. 3. There also are significant differences in what motivates them to buy clothes and what they actually purchased(=their motives to buy clothes and their actual purchasing).

• 패션비즈니스
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• 제2권4호
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• pp.28-39
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• 1998

The purpose of this study was to demonstrate the information sources according to the benefit segmentations of New kids' jeans wearing. The subject consisted of 392 adolescents in Seoul and Honsung area. For analysis of data, confirming factor analysis, correlations, stepwise regression analysis were applied. The results were as follow ; 1. The benefit segmentation dimensions of New kids' jeans wearing were brand royalty, personality, fashionality, and utility pursuit. 2. According to the correlations between the benefit segmentation and the information sources, brand royalty was positive correlation with all information sources. Similary, both personality and fashionality were positive correlation with market initiated and neutral information. The other hand. only utility was negative correlation with neutral information. 3. In influences of the information sources according to the benefit segmentations, market initiated information is high valued in personality, fashionality, utility, and brand royalty. Neutral information is high valued in fashionality.

• Nuclear Engineering and Technology
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• 제28권6호
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• pp.532-541
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• 1996

Theoretical and numerical study on heat transfer and evaporation in the vertical channel has been carried out and basic correlations have been derived for the heat transfer evaluation of PCCS. Analysis program was developed with low-Reynolds-number k-$\varepsilon$ model and surface transfer rates were calculated for the turbulent natural convection in the vertical channel. In relation to dry cooling by buoyancy-driven air, first, the system parameters which govern overall heat transfer rate are determined through the adequate nondimensionalization procedure. After comparison with existing experimental data, numerical results are used to derive heat transfer correlation by sensitivity calculations. In relation to wet cooling by falling water film, numerical analysis are carried out for evaporation process with real film surface conditions and evaporation correlation is derived through analogy concept and correction factors.

• 한국원자력학회:학술대회논문집
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• 한국원자력학회 1998년도 춘계학술발표회논문집(1)
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• pp.437-442
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• 1998

Film boiling is the heat transfer mechanism that can occurs when large temperature differences exist between a cold liquid and hot material. In the nuclear reactor safety analysis, film boiling has become an important issue in recent years. During severe accident, hot molten corium fall into relatively cool water, and fragment into spheres or sphere-like particles. If the steam explosion is triggered, the thermal energy of corium is converted into the mechanical energy that can threaten the integrity of reactor vessel or reactor cavity. One of the important concerns in the heat transfer analysis during pre-mixing stage is the film boiling heat transfer between the corium and water/steam two-phase flow. Until now, considerable works on film boiling heat been performed. However, there is no available correlation adequate for severe accident analysis. In this study, boiling heat transfer correlations have been developed, and their applicable ranges heat been enlarged and their prediction accuracy has been enhanced.

• 한국인쇄학회:학술대회논문집
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• 한국인쇄학회 2001년도 국제학술발표회
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• pp.35-43
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• 2001

• 한국IT서비스학회지
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• 제14권3호
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• pp.49-65
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• 2015

As South Korean large business groups, also known as Chaebol, have broadened their influence in the domestic economy, it is important to analyze the influence of internal transactions among Chaebol affiliates on their performance. In this paper, relationship between internal transactions and efficiency of Chaebol affiliates has been analyzed. Top five Chaebol groups in South Korea are selected; they include Samsung, Hyundai Motors, LG, SK, and Lotte group. Based on internal transactions among affiliates, social networks are constructed for each Chaebol group to analyze centrality, network structures and cliques. Data Envelopment Analysis (DEA) was conducted to examine the efficiency of the Chaebol affiliates. Then, correlations between the degree centrality and the efficiency of Chaebol affiliates were analyzed, and the network structures of Chaebol groups are presented. The result shows that positive correlations between degree centrality and efficiency are observed among four Chaebol Groups. This paper shows that the Social Network Analysis (SNA) techniques can be used in the empirical research for the analysis of internal transactions of Chaebol groups.

• 한국융합학회논문지
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• 제11권11호
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• pp.309-319
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• 2020

본 연구에서는 팬데믹 상황(COVID-19)에서 일반인이 경험하는 불안, 사회적 지지, 신뢰 간의 관계가 어떠한지를 살펴보고, 사회적 지지와 불안의 관계에서 신뢰가 어떠한 영향을 미치는지 확인하였다. 첫째, 각 변인들 간 관계를 알아보기 위해 상관분석을 실시한 결과, 사회적 지지와 불안은 부적 상관관계를 보였고, 사회적 지지는 사회신뢰와 정적 상관을 보였으나, 정부신뢰와는 유의미한 상관을 보이지 않았다. 또한 정부신뢰와 사회신뢰 모두 불안과 부적 상관을 보였다. 둘째, 사회적 지지가 사회신뢰를 통해 불안에 영향을 미칠 것이라는 가설을 검증하기 위해 회귀분석을 실시한 결과, 사회적 지지와 불안 간의 관계를 사회신뢰가 부분 매개하는 것으로 나타났다. 이러한 결과를 토대로 논의 및 제안점을 제시하였다.