• 한국안전학회지
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• 제17권2호
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• pp.92-99
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• 2002

Safety-related motor operated valve(MOV) safety significance for Ulchin Unit 3 was categorized. The safety evaluation of MOV of domestic nuclear power plants affects the generic data used for the quantification of MOV common cause failure(CCF) events in Ulchin Units 3&4 PSA. Therefore, in this paper, MGL(multiple greek letter)parameter ${\beta}$, used for the evaluation of MOV CCF probabilities in Ulchin Units 3&4 probabilistic safety assessment(PSA), was re-estimated and the MOV safety significance was categorized. The re-estimation results of MGL parameter show that the value of(is decreased by 30% compared with the current value used in Ulchin Unit 3&4 PSA. The categorization results of MOV safety significance using the changed value of MGL parameter(show that the number of HSSCs(high safety significant components) is decreased by 54.5% compared with those using the current value of it used in Ulchin Units 3&4 PSA.

• Nutrition Research and Practice
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• 제3권2호
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• pp.162-166
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• 2009

The objectives of this study were to identify the dietary patterns associated with hypertension among Korean males. Data from the 2001 Korean National Health and Nutrition Survey of 1,869 men aged 20-65 years were used for the analysis. As an initial analysis, a factor analysis was applied to identify major dietary patterns among the subjects. Then logistic regression analysis was conducted to identify the pattern related with hypertension. As a result of the initial analysis, three major dietary patterns were identified. Dietary pattern 1 (traditional) was heavily loaded with vegetables, fish and cereal. Dietary pattern 2 (Western) was loaded with fast foods, bread, meats and dairy products. Dietary pattern 3 (Drinker) was loaded with mostly pork, beer and soju (Korean liquor). From the second stage of the analysis, there was a tendency of positive association between traditional patterns and hypertension risks. However, the tendency did not meet statistical significance level (p<0.05). In summary, unlikely findings from European and American studies, vegetables rich traditional dietary patterns did not show any protective effect on hypertension in Korean males. The Korean dietary practice, which is consuming salted vegetables instead of fresh vegetables, might have played a role in these findings. However, the full explanation of the findings remained to be answered with further investigation since none of the dietary patterns identified showed any statistical significance.

• 한국환경과학회지
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• 제18권2호
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• pp.169-176
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• 2009

The present study observed temperature in order to identify factors affecting temperature by zoning and to measure the intensity of their impact on temperature. The empirical results of analyzing observed data are as follows. In order to make up for multicollinearity, a problem in multiple regression analysis, and to give more specific explanations, this study conducted factor analysis and obtained desirable data with adequacy and statistical significance. In the correlation matrix, factors decreasing temperature were planted areas, water surfaces and grasslands, and those increasing temperature were bare grounds, paved areas, and building area. According to land cover patterns, commercial areas had the highest temperature lowering effect. Through the rotated component matrix, we found that factors are grouped into those decreasing temperature, those increasing temperature, and those with low significance in increasing or decreasing temperature. In order to solve the problem of multicollinearity in multiple regression analysis, we performed factor analysis between the land use patterns and temperature and confirmed the usability of factor analysis as a new analysis method in urban heat island.

• 한국컴퓨터정보학회논문지
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• 제22권11호
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• pp.125-133
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• 2017

Recently, as the programming education has become essential in school, discussion of how to teach programming has been important. This study performed a meta-analysis of the effect size depending on the teaching and learning method for the programming education. 78 research data selected from 45 papers were analyzed from cognitive and affective aspects according to dependent variables. The analysis from the cognitive aspect showed that there was no statistically significant difference in the effect size depending on whether or not the teaching and learning method was specified in the research paper. Meta-analysis of the research data where the teaching and learning method was designated displayed significances in CPS, PBL and Storytelling. Unlike the cognitive aspect, the analysis from the affective aspect showed that the effect size of the research data without the specified teaching and learning method was larger than those with specified teaching and learning method with a statistical significance. Meta-analysis of the data according to the teaching and learning method displayed no statistical significance. Based upon these research results, this study suggested implications for the effective programming education.

• 수산해양기술연구
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• 제48권1호
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• pp.51-58
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• 2012

As a basic study to improve hooking ability of long line fishing gear, which is widely used around Jeju-do coast, the researcher performed hooking experiment of parrot fish by manufacturing and installing 7 kinds of model long line fishing gears, whose thickness of branch line are different and 8 kinds of model long line fishing gear, whose length of branch line are different, in indoor circular aquarium, which is installed for the model experiment of thickness and length of branch line that are various by fishing implement and improper. The hooking rate depending on thickness and length of branch line was calculated and the effect of thickness and length of branch line on hooking rate was analyzed. Its results are as follows. When branch line was thin and long, high hooking rate appeared. In the scope of value setting, the relationship between thickness ($B_t$) of branch line and total hooking rate ($Th_r$) can be shown as following formula as. In the scope of value setting, the relationship between length ($B_t$) of branch line and total hooking rate ($B_t$) can be shown as $Th_r=-20.83B_t+26.04$. Through Pearson correlation analysis, the coefficient of correlation between thickness of branch line and hooking rate was -0.718. Therefore it showed significance in 0.01 significance level. Through Pearson correlation analysis, the coefficient of correlation between length of branch line and hooking rate was 0.431. Therefore it showed significance in 0.01 significance level.

• 한국학교보건학회지
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• 제19권2호
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• pp.75-88
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• 2006

Purpose : This study are the secondary data of Global Youth Tobacco Survey(GYTS) developed by the WHO and United State Center for Disease Control(CDC) and Prevention to trace tobacco use among youth in youth in countries across the world. This study was carried out to serve for a basis for antismoking campaigns and to prevent adolescents from smoking by analyzing the smoking by analyzing the smoking realities factors. Methods : This study is a cross-sectional school-based survey, which employed a two-stage cluster sample design to produce a nationally representative sample of middle school students aged 13 to 15 years olds. Seventy-five schools were selected. All schools containing grade 1, 2 and 3 that contained 40 or students were included in the sampling frame. Results : The results of this study were as follows ; 1. The proportion of smoking students in middle school was 6.4% and the rate of smoking in male students(7.4%) was higher than it of in female students(5.5%). 2. 26.5% of all respondent had a experience to try smoke and the results showed that the rate of trying smoking in male students was increased by grade more than female students. 3. According to test of significance in regression analysis, the independent variables such as sex, school grade, smoking parents, friends distinction, pocket money and others showed statistical significance. 4. There was a statistical significance between smokers and nonsmokers in proportion to the completing the preventive education for nonsmoking(p=0.0023) and the acquirement of knowledge on smoking(p<.0001). 5. Finally there was a statistical significance between the exposure to anti-smoking campaign(p=0.0053) and tobacco advertisement in the mass media and the smoking(p=0.0036). Conclusion : All things considered, the health education for tobacco control in school need to be developed from an elementary school. I suggest that prevent smoking program in school need to be revitalized and be made more accessible for everyone who wish to quit. And the government should develop the regulation on total banning promoting cigarette advertising and smoking scene in the movie for young people.

• 한국임상보건과학회지
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• 제2권4호
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• pp.239-246
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• 2014

Purpose. to describe the prevalence of refractive error according to aging in young children in South Korea. Methods : From July 2013 to June 2014, five hundred subjects( 250 male subjects, 250 female subjects; aged between 7 and 12 years) were performed in refraction test using the Auto-Refraction. Myopia, hyperopia, astigmatism, and anisometropia were defined as spherical equivalent(SE)${\leq}-0.50$ diopters, SE ${\geq}+2.00$ D, cylinder error ${\geq}0.75$ D and SE difference${\geq}1.00$ D between binocular eyes, respectively. Results. The refractive error by spherical equivalent among all subjects was myopia 80.41%, astigmatism 44.89%, emmetropia 18.27%, anisometropia 16.92%, and hyperopia 1.32%. The prevalence of myopia increased with age. but hyperopia was decrease. Myopia and astigmatism were much more common in male than females although the difference was not statically significant. Emmetropia and hyperopia were much more common in female than males although the difference was not statically significant. The prevalence of spherical equivalent was much common from -1.00 diopter to 0.99 diopter. On the other hand, the prevalence of myopia was much more than hyperopia. There was a statistical significance between 9 year and 10 year of female in the spherical equivalent power(p>0.05). In all another group of age, there was not a statistical significance as aging in spherical equivalent power(p>0.5). However, there was a statistical significance between male and female as age in the spherical equivalent power(P>0.01). Conclusions: Myopia was the most common refractive error in Korea young children, while hyperopia was decreased after 7 years. There was a statistical significance as age between male and female at spherical equivalent power(P> 0.01). these results suggested that the analysis of the refractive error as age at young children can give the useful diagnosis data for the correction of visual function.

• 한국생활과학회지
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• 제18권2호
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• pp.523-534
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• 2009

The purposes of this study were to identify brand equity factors influencing on brand preference and to investigate the effects of preference, price acceptability, distribution proximity, and appropriateness on brand performance of domestic and imported cosmetics brands. A total of 300 women aged between 20 and 49 years were surveyed on two domestic brands and two imported brands that were well-known to consumers during the month of September, 2006, in Seoul, Daejeon, Gyeonggi-do, and Chungcheong-do. The data were analyzed with factorial analysis, multiple regression analysis, ANOVA, Cronbach's ${\alpha}$, etc., using the SPSS 12.0. The result of the study included: 1) Four factors of brand equity were identified: brand image, social reputation, quality, and brand awareness. 2) Brand image, quality, appropriateness, and brand performance of the domestic brands were higher than those of the imported brands. But brand awareness of the imported brands was higher than that of the domestic brands. 3) Brand preference of the domestic brands was affected by social reputation, quality, brand image, and brand awareness in order of significance. And brand performance of the domestic brands was affected by brand preference, appropriateness, price acceptability and distribution proximity in order of significance. 4) Brand preference of the imported brands was affected by brand image, social reputation, brand awareness, and quality in order of significance. And brand performance of the imported brands was affected by appropriateness, price acceptability, brand preference, and distribution proximity in order of significance.

• 공학교육연구
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• 제9권1호
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• pp.43-60
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• 2006

이 연구의 목적은 공학교육의 교육목표에 맞는 교수목표 및 교수방법의 질 개선에 있어서 현재 재학 중인 공과대학의 학생들이 인식하고 있는 교육목표에 따른 교수목표 및 교수방법의 중요도를 조사 분석하는 것이다. 이 연구의 모집단은 전라북도 지역에 소재하는 공과대학생이고, 표본은 유층 임의표집으로 종합대학 5개교를 3개 계열로 분류하여 표집하였다. 이 연구의 결과는 다음과 같다. 첫째, 학생들은 엔지니어 및 사회 구성원으로서의 자질 교육을 위해서 교수목표 및 교수방법에 대해 태도 견해의 학습이 다른 교수목표에 비하여 중요하다고 인식하였다. 둘째, 특성화된 전문가 및 자율적 자기발전을 추구하는 자질 교육을 위해서 기능 작업의 학습이 다른 교수목표에 비하여 중요하다고 인식하였다. 이러한 결과는 학생들이 인식하는 공학교육의 교수목표와 방법의 중요도 수준은 변인에 따라 조금씩 차이가 있었으나, 모든 영역에서 3점(중요함)과 4점(매우 중요함) 사이에 분포되었다.

• 사상체질의학회지
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• 제16권3호
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• pp.46-58
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• 2004

1. Objectives This study was performed by means of perceptual evaluation of the voices of Sasang Constitution. 2. Methods 73 female subjects were classified by means of 3 kinds of Questionnaire papers(QSCCII, QSCCI, Sasang Pattern Identification Questionnaire). So they were categorized into 3 groups, 23 Soyangin, 28 Taeumin and 22 Soeumin. 73 voice samples were presented three times to a group of 5 judges. The time interval between ratings was 14 days. The four goals of this study were to evaluate the intraobserver reliability between each rating, to evaluate the interobserver reliability, to evaluate the reliability between the each rating and Questionnaire result and to make the notion of the consensus of Sasang Constitution's Voice. 3. Results & Conclusions The intraobserver reliability between the first and second rating showed significance statistically among all observers. And the intraobserver reliability between the second and third rating showed significance except one observer. The interobserver reliability among the three ratings showed significance statistically except one to two observers in the first rating and other one to another one in the second rating. In the reliability between the each rating and Questionnaire result, one in the first rating, other one in the second rating and another two in the third rating showed significance. To make the notion of the consensus of Sasang Constitution's Voice, classification into 4 categories was made: clear/hoarse, high/low, fast/slow, powerful/powerless. The voice of Soyangin group was classified as powerful and fast, and that of Taeumin group as powerful, hoarse and low and that of Soeumin group as powerless and slow.