• Journal of Preventive Medicine and Public Health
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• v.50 no.2
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• pp.100-126
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• 2017

Objectives: The aim of this study was to measure income differences in smoking prevalence at the district level and to investigate correlations among area deprivation, smoking prevalence, and income differences in smoking prevalence, stratified by urbanity. Methods: Data were pooled from the Community Health Survey data of South Korea between 2008 and 2014. The age-standardized prevalence of smoking and its interquintile income differences were calculated. We conducted correlation analyses to investigate the association of the deprivation index with smoking prevalence and interquintile differences in smoking prevalence. Results: Across 245 districts, the median prevalence of smoking in men was 45.9% (95% confidence interval [CI], 43.4 to 48.5%), with an interquartile range (IQR) of 4.6% points. In women, the median prevalence was 3.0% (95% CI, 2.4 to 3.6%) and IQR was 1.6% points. The median interquintile difference in smoking prevalence was 7.4% points (95% CI, 1.6 to 13.2% points) in men and 2.7% points (95% CI, 0.5 to 4.9% points) in women. The correlation coefficients for the association between the deprivation index and smoking prevalence was 0.58, 0.15, -0.22 in metropolitan, urban, and rural areas, respectively, among men, and 0.54, -0.33, -0.43 among women. No meaningful correlation was found between area deprivation and interquintile difference in smoking prevalence. The correlation between smoking prevalence and interquintile difference in smoking prevalence was more evident in women than in men. Conclusions: This study provides evidence of geographical variations in smoking prevalence and interquintile difference in smoking prevalence. Neither smoking prevalence nor the deprivation index was closely correlated with interquintile income difference in smoking prevalence. Measuring inequalities in smoking prevalence is crucial to developing policies aimed at reducing inequalities in smoking.

• Journal of The Korean Society of Integrative Medicine
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• v.4 no.3
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• pp.93-100
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• 2016

Purpose : The purpose of this research is to measure the correlations among sleep quality, depression and department satisfaction in the students enrolled in the nursing college located in the B city. Method : 268 students enrolled in the nursing college located in the B city participated in this research from the 1st May 2016 to the 31st May 2016. SPSS 18.0 was applied to the collected data to calculate the frequency, percentage, average and standard deviation. In addition, t-test, ANOVA, Scheffe test and Pearson correlation coefficient were used for the analysis. Result : The result of the average sleep quality, depression and department satisfaction in the nursing college students were measured to be $2.41{\pm}0.57$, $3.59{\pm}0.50$ and $3.56{\pm}0.57$ respectively. The sleep quality based on the general characteristics indicated a significant difference when applied to the health status(F=4.46, p=.012). The depression indicated a significant difference when applied to the living with parents(t=-2.18, p=.030) and relationship with friends(F=8.62, p=.000). The department satisfaction indicated a significant difference when applied to the grade(F=3.45, p=.017), personality(F=3.46, p=.033), and reason for applying for their department(F=2.49, p=.044). As a result of analyzing the correlations among sleep quality, depression and department satisfaction in the nursing college students, the sleep quality indicated a negative correlation with the depression(r=-.528, p=.000) and a positive correlation with the department satisfaction(r=.144, p=.018). The depression indicated a negative correlation with the department satisfaction(r=.119, p=.051). Conclusion : It is necessary to conduct a replication research by increasing the number of the research subjects. In addition, it is necessary to conduct a systematic research on the factors influential on sleep quality, depression and department satisfaction in order to develop a program capable of enhancing the sleep quality and decreasing the depression.

• Journal of Advanced Navigation Technology
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• v.18 no.1
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• pp.7-13
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• 2014

In this paper, an effect on a GPS receiver by spoofing signal is analyzed and a GPS spoofing signal detection algorithm for GPS L1 C/A spoofing signal is proposed. A proposed detection algorithm monitors the correlation function distortion by the spoofing signal. If detected distortion is over a detection threshold, we can determine that the spoofing signal is received. The detection threshold is calculated from the statistical characteristics of a thermal noise. For verifying the suggested algorithm, a MATLAB-based simulation platform is implemented. This platform has functionalities to track GPS signal and measure the correlation values. By using this platform, the correlation function distortion by spoofing signal is observed. Also a performance of the algorithm proposed in this paper is applied and confirm the detection of a spoofing signal.

• Journal of Power Electronics
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• v.16 no.5
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• pp.1950-1963
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• 2016

A novel open-circuit fault diagnosis method for 3-phase 4-wire 3-level active power filters based on voltage error correlation is proposed in this paper. This method is based on observing the output pole voltage error of the active power filter through two kinds of algorithms. One algorithm is a voltage error analytical algorithm, which derives four output voltage error analytic expressions through the pulse state, current value and dc bus voltage, respectively, assuming that all of the IGBTs of a certain phase come to an OC fault. The other algorithm is a current circuit equation algorithm, which calculates the real-time output voltage error through basic circuit theory. A correlation is introduced to measure the similarity of the output voltage errors between the two algorithms, and OC faults are located by the maximum of the correlations. A FPGA has been chosen to implement the proposed method due to its fast prototyping. Simulation and experimental results are presented to show the performance of the proposed OC fault diagnosis method.

• Journal of Digital Convergence
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• v.15 no.5
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• pp.253-262
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• 2017

The purpose of this study was to analyze the correlation between psychosocial factors and therapeutic flow in stroke patients and identify the factors influencing therapeutic flow. Total 168 stroke patients from 15 hospitals were measure for depression, stress, self-efficacy, rehabilitation motivation and therapeutic flow. Factors that affect the therapeutic flow correlation as s result of negatively correlated with depression(r=-.349, p<.001), stress(r=-.290, p<.001), self-efficacy(r=.528, p<.001), rehabilitation motivation(r=.186, p<.05) was found in the positively correlated. Finally the effect on therapeutic flow in stroke patients variables affecting self-efficacy(${\beta}=.443$, p<.001) and depression(${\beta}=-.155$, p<.05) were the order of analysis. These result demonstrate that the therapeutic flow of storke patients was a significant correlation on psychosocial factors, future study will continue to be needed.

• Journal of Korean society of Dental Hygiene
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• v.17 no.6
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• pp.1171-1182
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• 2017

Objectives: The purpose of the study was to investigate the correlation between critical thinking and problem-solving abilities in dental hygiene students. Methods: This is a cross-sectional study. A self-reported questionnaire was completed by 386 dental hygiene students enrolled in Gwangju Health university from August 30, 2017 to September 2, 2017. The general characteristics of the subjects, their critical thinking and problem-solving abilities were measured for the study. The tool to measure critical thinking was adapted from Yoon which had a Cronbach' alpha of 0.77. The tool for problem-solving ability was adapted from that used in Heppner & Petersen, which had a Cronbach' alpha of 0.77. The collected data are analyzed using ANOVA, Pearson's Correlation analysis, and multiple regression using SPSS/Win 18.0 program. Results: The results show that critical thinking scored 3.45 while problem solving ability scored 3.20. The correlation between critical thinking and problem-solving abilities was found to be strong. The strongest positive correlation in problem-solving ability was critical thinking (p<0.001). The multiple regression analysis suggests that the factors affecting problem solving ability of the subjects was statistically significant. The significant variables included critical thinking (${\beta}=0.440$) (p<0.001), satisfaction with one's major (${\beta}=0.108$) (p<0.05), interpersonal relationships (${\beta}=0.104$) (p<0.05) and academic performance (${\beta}=0.086$) (p<0.05) with an explanatory power of 38.3%. Conclusions: It is necessary to develop a curriculum and learning method for critical thinking and problem-solving abilities in the dental hygiene students.

• Journal of The Korean Society of Integrative Medicine
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• v.7 no.4
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• pp.203-212
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• 2019

Purpose : The purpose of this study was to determine the correlation between the self-esteem of health science college students and their empathy for others. Methods : A survey was administered to 448 students from the five departments of health science (Occupational Therapy, Physical Therapy, Dental Hygienics, Nursing, and Medical Administration) at a college located in Busan, South Korea, between September 28 and November 2, 2017. To measure their self-esteem and empathy for others, the Self-esteem Scale and the Korean Empathy Quotient (K-EQ) Scale were used. Results : There were statistically significant differences in social skills as a sub-item of empathy skills based on age and department, as well as in emotion as a sub-item of empathy skills based on sex. Self-esteem and all the items of empathy showed meaningful differences based on monthly expenses, while self-esteem and cognition as a sub-item of empathy skills displayed significant differences based on source of monthly income. Noteworthy differences were also found in self-esteem and emotion as a sub-item of empathy skills based on satisfaction with current school life. Self-esteem and empathy skills were shown to have a positive correlation. Conclusion : According to the results of this study, self-esteem and empathy skills had a statistically significant correlation. Further research is needed to investigate how health science college students can improve their understanding of themselves and their empathy for others.

• Korean Journal of Community Nutrition
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• v.7 no.1
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• pp.58-66
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• 2002

The purpose of the study was to develop and evaluate the reliability of a semi-quantitative food frequency questionnaire (SFFQ) intended to measure mainly nutrient intake (energy, protein, fat, calcium and iron) related to growth in pre-schoolers in Korea. Based on foods with up to 90 cumulative percent contribution of the 5 nutrients, we developed a SFFQ for 86 foods. In order to evaluate the reliability of both nutrient and food intakes, caregivers of a sample of 101 children aged 4 to 6 years completed the SFFQ repeatedly at 3 month intervals. There were small differences in the nutrient intakes assessed by the SFFQ ranging from 0.55% to 9.91%. There were no significant differences in nutrient values calculated from the repeat questionnaires, except in the case of niacin and vitamin C. The Pearson correlation coefficients of most of the nutrients ranged form 0.54 to 0.75 (mean = 0.66). When energy intake was adjusted, there was approximately a 0.2 decrease in the correlation coefficient of most nutrients, due to the high correlation of energy intake with other nutrients (r=0.7-0.9). The amount of food intake differed by 0.1 to 66.4% (mean = 17.5%), depending on the food item. Out of 86 foods, 74 foods (86%) showed less than a 30% difference in intake and 30 foods (35%) showed less than a 10% difference. Only 6 (7%) out of the 86 foods presented statistically significant differences in intake. The Spearman correlation coefficients of most food intakes assessed repeatedly by the SFFQ ranged from 0.4 to 0.7. Reproducibility of the nutrient and food intakes found in this study was better or similar to those found in cases of Korean adults. Therefore, the SFFQ developed in the present study can be a useful tool to assess the dietary intake of pre-schoolers in Korea.

• Journal of the Korean Society of Clothing and Textiles
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• v.1 no.1
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• pp.1-5
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• 1977

'Adolescence' is a critical period in the process of growing and aging but important in that an adolescent becomes aware of and begins to look about him or her self. Especially with girls in their late teens (15$\~$18), they pay more attention to their looks and clothes than the boys do, which affects to some extent the formation of their personality and their behavior. From this point .of view. it is significant to establish the standard size of high-school girls' clothes. This study aims to measure high-school girls in size and to establish the standard size of their clothes; furthermore. to enable them to lead a satisfactory living with more appropriate size of clothes. The results, analyzed by two different representing items which resulted in little difference, are as belows: 1) Stature had a significant correlation with posterior waist height; bust girth had the most significant correlation with weight. and also some considerable correlation with other representing items; 2) The F-test result showed significant difference on $1\%$ level over all the items between the measured (Y) and the estimated (Y); the correlation among the representing items was considerable also; 3) When the measurement increases in stature by 4cm, bust girth by 4cm. and posterior shoulder width by 2cm respectively, the increase or decrease in other items are as shown on Table 4. Since this study was carried out in girls' high-schools in Seoul, it is expected to extend its further study throughout the nation. thus contributing to comprehending the whole truth of people's body-size and promoting the fabrication and modelling of the original clothes for the nation by the strict standard size up to making ready-made clothes with no difficulty in setting the standard and model size.

• Journal of the Korean Society of Clothing and Textiles
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• v.21 no.7
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• pp.1124-1138
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• 1997

This study intended to investigate the concept of Clothing Involvement and Brand and to provide useful basic data for building on affective brand strategy. The purpose of this study is as follows: first, It is to measure the result of Brand Extension attitudes and Brand Extension items by clothing involvement (high involvement/low involvement). Second, It is to classify the factors of Clothing Involvement which suggested in theoretical research and to clarify correlation between clothing involvement factor and brand evaluation, brand extension attitudes. Third, It is to investigate the affect that clothing involvement, demographic variable and brand type on Brand Extension Evaluation. Subjects of this study were the adult women in Seoul, who were extracted by sampling randomly during the fall of 1995. Questionnaire was used as major method of gathering data. They were analyzed by the SAS method such as Frequency, Anova, Duncan, Correlation, multiple regression, Factor analysis. Main result of this study were as follows : 1. In brand extension attitude evaluation by high-involve group and low-involve group, quality, reputation and buying intension of brand extension attitudes showed significant difference. B brand extension attitudes and items of high-involve group was high compare to low-involve stoup. High-involve group evaluated watch, underwear, shoes and stocking of extension items highly, and there is no involvement difference of perfume, parasol, cushion. 2. In order to classify the dimension of Clothing Involvement, it was carried out factor analysis. 1 found that Clothing Involvement was composed of 4 factors, namely, interest - fashion.perceived risk symbolism. Correlation between clothing involvement and brand extension attitude was as followed; Interest factor of clothing involvement was correlated the existing brand attitude. Brand preference of the existing brand attitude was related the image of brand extension attitude, interest of advertising was the quality and the reputation-image was the buying intension. 3. For evaluation of a factor influenced on Brand Extension, it was produced multiple -regression test. Demographic variables and brand types had some influence of Clothing Involvement and Clothing Involvement had on brand extension. 27% of interest, 26% of symbolism was explained by brand types and 15% of fashion, 6% of perceived risk was explained by brand types, demographic variables. And, 10% of brand extension was explained by interest, fashion and symbolism.