• 한국대기환경학회지
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• 제15권4호
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• pp.385-392
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• 1999

This study was carried out to investigate the constituents of inorganic ions of precipitation in Mokpo and Yeochon area from Jan. 1996 to Dec. 1997. The volume-weighted mean pH of precipitation was 5.7(4.8~7.8) at Mokpo, and 5.6(5.1~7.4) at Yeochon area, respectively. The non-seasalt(nss) anion concentrations were found in order of $nss-SO^{2-}_4>NO^-_3>nss-Cl^-$ at two areas. The portion of $nss-SO^{2-}_4;and;NO^-_3$ was 71~84% out of anions. The the non-seasalt cation concentrations were found in order of $NH^+_4>nss-Ca^{2-}>nss-Mg^{2+}>nss-K^-$ at two areas. The portion of $NH^+_4;and; nss-Ca^{2+}$ was 85~92% out cations. Compared regionally the year concentraton of $nss-SO^{2-}_4$, the result of Yeochon was 3 times higher than that of Mokpo in 1996, while the results of two regions were almost similar in 1997. The reason was that Yeochon was restricted area of the use of 0.5% sulfur B-C oil, controlled air pollution emission area, controlled semitotal amounts of air pollution emission area and partial operating of factories in 1997. There were no ions having high correlation with $H^+,;but;nss-SO^{2-}_4,;NO^-_3,;NH^+_4;and;nss-Ca^{2+}$ showed high correlation coefficient each other. It seems that these ions have little correlation with $H^+$ because they are washed out on binding state. Factor analysis showed that the first factor was complicated factor containing anthropogenic and soil resource, the second factor was sea-salt resource and the third factor was independent behavior of hydrogen at Mokpo. While, the first factor was complicated factor containing anthropogenic and sea-salt resource, the second factor was $Ca(NO_3)_2$ salt and the third factor was $NH^+_4;and;SO^{2-}_4$ synergied by resource and combination at Yeochon.

• 패션비즈니스
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• 제5권2호
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• pp.117-127
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• 2001

This study identified self-image of the eldery wemen by relatied to body-satisfaction, self-image, shopping-orientatons. For study, a questionnaire was used a method of mearsurement and eldery women in seoul and kyunggi were selected as a sample. Data was processed by SPSS PC+ program and analyzed by using frequency, percentage, t-test, factor analysis and Pearson's correlation. As a result, the body-satisfaction of eldery women was very low, their pursuiting self-image was gracios, younger, noble. The self-image classified grace attraction factor, intelligence factor and activity factor. Relationship between body-satisfaction and self-images was significant to gracious attractive factor and active factor. The shopping-orientatons classified brand name disply factor, personality pride factor, pratical benefit factor, prudence factor, planning purchase factor. Shopping-orientatons and self-images were significant to Pearson's correlation. The aim of this study help fashion contractors and retailers to establish effective marketing strategies.

• 대한안전경영과학회:학술대회논문집
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• 대한안전경영과학회 2008년도 추계학술대회
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• pp.303-316
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• 2008

For the past 25 years, Korean semiconductor has experienced enormous growth to be the highest production country in the world. Semiconductor industry is very time sensitive and driven by technology and process, and requires 24-hour full operation. The environment includes many different types of equipment, utilities, different gases and toxic chemicals as well as high voltage electricity. We have performed a survey with 3-shift engineers and workers in one line. The content of the questionnaire was about the correlation between fatigue and performance shaping factor (work type and work ability), and as a result we were able to deduce the correlation, p-value and the pattern of scatter plot. The shape of the model was made of 4 blocks for fatigue, 5 blocks for work type and 5 blocks for work ability, i. e. 14 blocks in total. As a conclusion to this findings, there was a correlation between fatigue and work type and work ability specifically in semiconductor industry, and we need some effort to reduce this.

• 패션비즈니스
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• 제20권4호
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• pp.36-49
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• 2016

The objective of this study was to examine the effects of appearance management behaviors on career decision level among female college students. Based on previous studies on appearance management behaviors and career decision level, the items for a questionnaire were developed. For the study, we conducted a questionnaire survey among 292 students from women's university in Seoul. Factor analysis, correlation analysis and multiple regression analysis were performed using SPSS statistics 23. Results of this study are as follows. First, the factor structure of appearance management behavior had three factors: 'fashion & hair,' 'skin & plastic surgery,' and 'body shape.' The reliability and validity of the factor structure were proved. Second, a significant correlation was found between sub-factors in appearance management behaviors. Career decision level showed a significant correlation only with body management factor. Third, the appearance management behavior of female college students was found to have a partially significant effect on career decision level. For higher grade students, fashion & hair factor and body shape factor had positive effects on career decision level. For lower grade students, body shape factor had a positive effect on career decision level while skin & plastic surgery factor had a negative effect on career decision level. Therefore, to increase career decision level, managing appearance through keeping fit body shape is crucial. This study also suggests that as one elevates to a higher grade, the importance of management and keeping interest toward fashion is important.

• 설비공학논문집
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• 제14권12호
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• pp.1004-1013
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• 2002

Turbulent carbon dioxide flows and cooling heat transfers under supercritical state in a straight duct with a square cross-section are numerically analyzed employing low Reynolds number $\kappa-\varepsilon$ model and algebraic stress model. The flow is assumed to be (quasi-incompressible. Predicted Nusselt number and friction factor are compared with the experimental data, Blasius correlation for friction factor and Dittus-Boelter correlation for Nusselt number. Computational results for the Fanning's friction factor agree well with the all Rohsenow and Choi's correlation, Liou and Hwang's experimental data and Blasius correlation. The results obtained by algebraic stress model agree more with the Liou and Hwang's experimental data, while the results obtained by low Reynolds number $\kappa-\varepsilon$ model agree more with Blasius correlation. In the computation of Nusselt number, Dittus-Boelter correlation can not exactly fit the computational results. Therefore we propose the new correlation$Nu=0.053Re^{0.73}Pr^{0.4}$for the turbulent cooling heat transfer of carbon dioxide under supercritical state.

• 대한한의진단학회지
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• 제13권2호
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• pp.34-44
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• 2009

Background : Currently, as a method of standardization of prescription, questionnaire for Buzhongyiqi-Tang[補中益氣湯] was developed, and which is a Objectives : The purpose of this thesis is to testify whether differentiation of Lao Juan Shang[勞倦傷] etiology is relative to mobility of gastric smooth muscle. Methods : The subjects(20 to 65 years old; 14 males, 46 females) were isolated from drinking alcohols for 24 hours before the experiment, and fasted for 8 hours, and measured for electrogastrography(EGG) and they filled out Questionnaire for Buzhongyiqi-Tang. Results : 1. Six factors from the factor analysis of Questionnaire for Buzhongyiqi -Tang were named and classified as Spleen-Qi deficiency syndrome factor [脾虛] (factor 1), Lung-Qi deficiency syndrome factor [肺虛] (factor 2), Working factor [習慣] (factor 3), Yin-Fire factor [陰火] (factor 4), Jung-Qi deficiency syndrome factor [中氣虛] (factor 5), and Stomach-Qi deficiency syndrome factor [胃虛] (factor 6). 2. As for the reliability of Questionnaire for Buzhongyiqi-Tang, we used Cronbach's alpha coefficient. Cronbach's alpha coefficient was 0.772 for the mean of the item-total. 3. Lung-Qi deficiency syndrome factor(factor2) had significant correlation with Bradygastria Time (r=-0.312, p<0.05). 4. Working factor(factor3) had significant correlation with Bradygastria Time (r=-0.329, p<0.05). 5. Yin-Fire factor(factor4) had significant correlation with Power Ratio (r=-0.328, p<0.05). Conclusions : It is shown that Bradygastria Time and Power Ratio tended to decrease against postprandial DP increased and postprandial frequency decreased in normal case.

• 대한안전경영과학회:학술대회논문집
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• 대한안전경영과학회 2009년도 추계학술대회
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• pp.187-201
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• 2009

Semiconductor industry is based on equipment industry and timing industry. In particular, semiconductor process is very complex and as semiconductor-chip width tails and is becoming equipment gradually more as a high technology. Equipment operation is primarily engaged in semiconductor manufacturing (engineers and operator) of being conducted by, equipment errors have also been raised. Equipment operational data related to the error of korea occupational safety and health agency were based on data and production engineers involved in the operator's questionnaire was drawn through the error factor. Equipment operating in the error factor of 9 big item and 36 detail item detailed argument based on the errors down, and 9 big item the equipment during operation of the correlation error factor was conducted. Each of the significance level was correlated with the tabulation and analysis. Using the maximum correlation coefficient, the correlation between the error factors to derive the relationship between factors were analyzed. Facility operating with the analysis of error factors (big and detail item) derive a relationship between the model saw. The end of the operation of the facility in operation on the part of the two factors appeared as prevention. Safety aspects and ergonomics aspects of the approach should be guided to the conclusion.

• Nuclear Engineering and Technology
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• 제38권8호
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• pp.809-818
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• 2006

The existing experimental data related to the turbulent mixing factor in rod arrays is examined and a new definition of the turbulent mixing factor is introduced to take into account the turbulent mixing of fluids with various Prandtl numbers. The new definition of the mixing factor is based on the eddy diffusivity of energy. With this definition of the mixing factor, it was found that the geometrical parameter, ${\delta}_{ij}/D_h$ correlates the turbulent mixing data better than Sid, which has been used frequently in existing correlations. Based on the experimental data for a highly turbulent condition in square rod arrays, a correlation describing turbulent mixing dependent on the parameter ${\delta}_{ij}/D_h$ has been developed. The correlation is insensitive to the Re number and it takes into account the effect of the turbulent Prandtl number. The proposed correlation predicts a reasonable mixing even at a lower S/d ratio.

• 한국문헌정보학회지
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• 제46권2호
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• pp.245-260
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• 2012

본 연구의 목적은 Kor-Factor2의 평가요소인 연평균 논문 수 대신 '총 논문 수의 십분위수'를 적용하여 지수 값과 질적 양적 평가요소 사이의 연관성의 변화를 분석하고, 다른 평가지표와 비교하여 등재학술지와 등재후보학술지를 구별해내는 정도를 평가하는 것이다. 지수 값과 질적 양적 평가요소 사이의 연관성의 분석은 지수 값과 평가요소 사이의 상관계수를 구하여 Kor-Factor2의 경우와 비교하는 방식으로 이루어졌다. 학술지 등재 상태의 구별 능력에 대한 평가는 Kor-Factor2, IF 및 학술지 h-지수를 비교 대상으로 하여 각 지수 값을 구하고, 등재후보학술지 집단과 등재학술지 집단으로 나누어 두 집단의 지수 값 평균 차이에 대한 독립표본 t-검정을 실시하였다. 연구 결과 본 논문에서 총 논문 수의 십분위수를 적용하여 제안한 지표가 Kor-Factor2와 비교하여 지수 값과 질적 평가요소 사이의 연관성이 양적 평가요소와의 연관성에 비해 높은 것으로 나타났으며, 학술지의 등재 상태에 따른 차이 구별 능력에 있어서도 Kor-Factor2, IF, 학술지 h-지수에 비해 우수한 것으로 나타났다.

• 한국전자파학회논문지
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• 제21권12호
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• pp.1401-1411
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• 2010

본 논문에서는 전자파 장해 측정용 야외시험장과 전자파 내성 시험장인 완전 무반사실과의 상관계수를 이용하여 완전 무반사실에서 전자파 허용 기준을 제시하였다. FAR Project(SMT4-CT96-2133), CISPR/A/665/DTR, CISPR A/665/DTR 문서들을 분석하고, 이 문서들과 이론적인 수식들을 이용하여 야외시험장과 완전 무반사실의 이론적인 상관계수를 도출하였다. 실험적인 상관계수를 도출하기 위해서 피시험기기를 제작하였으며, 제작된 피시험기기의 전기장 세기를 10 m 야외시험장과 3 m 완전 무반사실에서 측정하였다. 또한, 다중 소스원을 갖는 피시험기기를 위한 허용 기준을 제시하기 위해서, 전기 다이폴과 자기 다이폴의 방사 이론을 프로그램화 하였다. 이 프로그램을 이용하여 다중 소스원을 갖는 피시험기기를 위한 상관계수를 도출하였다. 이론적, 실험적 상관계수를 이용하여 완전 무반사실에서 전자파 허용 기준을 새롭게 제시함으로써 완전 무반사실이 야외시험장의 전자파 방사(EMI) 대체 시험장으로서 활용될 수 있음을 확인하였다.