• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.32 no.3
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• pp.102-110
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• 2004

A design code validated against the thermal analysis results of CFD and published RTE code for a regeneratively cooled combustion chamber has been developed. The major function of the code is to predict the regenerative cooling performance and stress of the chamber wall. Adopted are the empirical correlation for the evaluation of the heat transfer coefficient of hot gas and coolant, and theoretical formula for the fin effect of the channel rib. The hot-gas-side wall temperature from the present code shows 100 K difference at most compared to RTE results. It shows less than 10 % difference for the heat flux thrall through the chamber wall and hot-gas-side convective heat transfer coefficient. The major cause of the wall temperature difference is due to the underestimation of the fin effect of the channel rib.

• Journal of the Korean Society of Food Culture
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• v.18 no.5
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• pp.407-417
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• 2003

This study was performed to investigate nutritional intake, the dietary behaviors and plasma lipid profile between smokers and non-smokers of college male students in the Gyeonggi Area. Dietary behaviors and attitude toward smoking were investigated by questionnaires. The result obtained were as follows: There was no significant difference in anthropometric measurements between smokers and nonsmokers. There was no significant difference in dietary behaviors. However, smokers tended to eat more snacks and desserts than nonsmokers. In plasma lipid levels, smokers had higher levels of plasma triglyceride, LDL-cholesterol, VLDL-cholesterol and total cholesterol than that of non-smokers(p<0.05). HDL-cholesterol level of smokers was a lower than that of non-smokers although the difference was not significant. AI(Atherogenic Index), Total /HDL cholesterol ratio and LDL/HDL cholesterol ratio of smokers were significantly higher than that of non-smokers(p<0.01). BMI and SBP showed positive correlation with triglyceride(p<0.01) and VLDL-cholesterol(p<0.01). DBP showed positive correlation with triglyceride(p<0.001) and VLDL-cholesterol(p<0.01).

• Speech Sciences
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• v.9 no.3
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• pp.3-16
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• 2002

We examined some problems in speaker identification procedures: transformation of acoustic parameters into auditory scales, invalid measurement values, and comparability of spectral energy values across the frequency range. To resolve those problems, we analyzed the acoustic spectral energy of three Korean numbers produced by ten female students from narrow-band spectrograms at 19 proportional time points of each voiced segment. Then, cells of the first five spectral matrices were averaged to form a matrix model for each speaker. The correlation coefficients and sum of the absolute amplitude difference in each pair of the spectral models of the ten subjects were obtained. Also, some individual matrix models were compared to those of the same subject or the other subject with a similar spectral model. Results showed that in numbers '2' and '9' subjects could not be clearly distinguished from the others but in number '4' it shed some possibility of setting threshold values for speaker identification if we employed the coefficients and the sum of absolute difference. Further studies would be desirable on various combinations of the range of long-term average spectra and the degree of signal pre-emphasis.

• The Journal of Korean Academy of Orthopedic Manual Physical Therapy
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• v.13 no.2
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• pp.45-54
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• 2007

The purpose of this study was effect of hamstring length on one leg stance test(OLST) in 108 persons. (men 28, women 80). The active knee extension test(AKE) was applied 3 times on both leg and high score was selected. Then, one leg stance test(OLST) was applied 3 times on both leg and high score was selected. Also, persons divided two group that is normal hamstring length group and shortening group). The result were as follows : 1. The correlation analysis between Lt. hamstring length and one leg stance time was no significant relation($p_{Lt.}=0.271$, $p_{Rt.}=0.051$). 2. The correlation analysis between Rt. hamstring length and one leg stance time was no significant relation($p_{Lt.}=0.837$, $p_{Rt.}=0.334$). 3. The independent T -test between Lt. hamstring normal (knee extension > 150degrees) & shortening group (knee extension ${\leq}$ 150 degrees) in Lt. leg stance time was no significant difference(p=0.73), but in Rt. leg stance time was statistically significant difference(p=0.04). 4. The independent T-test between Rt. hamstring normal (knee extension > 150degrees) & shortening group (knee extension ${\leq}$ 150 degrees) in one leg stance time was no significant difference($p_{Lt.}=0.09$, $p_{Rt.}=0.16$).

• Journal of Oriental Neuropsychiatry
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• v.4 no.1
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• pp.155-164
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• 1993

In this study the author had attempted to establish a correlation among alcohol use and MMPI and lunar cycle. MMPI was carried on 2, April 1992(the last day of the second lunar month) and 15, June 1992(the fifteenth day of the fifth lunar month). These experiments took male and female students who were in WON KWANG University as subjects. The results of it suggested the followings. 1) Drinkers and normal subjects average of T-score in each scales were in a normal scores. 2) In every scales except L,K,Si scales drinkers showed higher scores than normal subjects. There was a significant difference on L, F, Pd, Pa, Sc, Ma scales. 3) On the fifteenth day of the month, drinkers showed Higher T-Scores than normal subjects in every scales excepts L,K,Si scales. There was a significant difference in Ma scale. 4) On the last day of the month, drinkers showed higher T-scores than normal subjects in every scales except L,K,Mf,Si scales. There was a significant difference on L, F, Pd, Sc, Ma scales. 5) Drinkers showed higher than normal subjects in symptom of neurosis and psychosis. As the results of above, human character changes to some extend according to alcohol use. There is a tendency that repeated drinking of college students prone to change into habitual drinking or alcoholic impairment. So controlled drinking among the college students is highly recommended.

• Journal of Distribution Science
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• v.17 no.7
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• pp.39-44
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• 2019

Purpose - This research was to help distribution of Go Bags (Survival Bag or Disaster Supplies Kit), which are useful for disaster preparedness, by surveying precomposed Go Bag items in internet shopping malls. Research design, data, and methodology - We checked 15 items including food, water, first aid kit, radio, flashlight or candles, battery, lighter or matches, whistle, blanket, towel, toilet paper, personal sanitations, raincoat, can opener, disaster manual in Go Bags based on the recommendations by the Ministry of the Interior and Safety. The number of items and price, domestic product, accreditation were compared using a Chi-square test. The Pearson's R was also used to summarize the strength of the linear relationship between the number of items and price, sub-items. Results - Mean of the sub-items was 21, and mean of the items was 8. There was a statistically significant difference between the number of items size and the price level (p=.014). There was also a statistically significant difference between the number of items and sub-items (p<.001), and correlation coefficient was a positive linear relationship of .467. Conclusions - Only eight were sold in the internet shopping malls as a precomposed Go Bag items. Even the approved Go Bags had no difference in the number of items. Higher prices had a relatively greater number of items, and it had a positive correlation between the size of sub-items and items.

• Journal of Korean Physical Therapy Science
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• v.8 no.1
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• pp.917-921
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• 2001

The purpose of this study was to examine the difference in measurements of passive range of motion(PROM) of shoulder when motions are assessed in sitting, as compared with supine and the intratester and intertester reliabilities for goniometric measurements of shoulder PROM using two different sizes of goniometers. * A thesis submitted to the committee of Graduate School of Public Health, Chungnam National University in partial fulfillment of the requirements for the degree of Master of Public Health conferred in February 2001. Fifty one adult male subjects were measured three times, in random order, for the six shoulder motions(flexion, extension, abduction, adduction, external rotation, and internal rotation) while sitting and supine by three different therapists. Data were analyzed to determine intraclass correlation coefficients (ICCs) and paired "t" values between trials for measurements with different goniometer and betweensitting and supine trials. There was statistical difference in measurement of shoulder motion between supine and sitting position and no statistical difference in goniometric type. The intratester intraclass correlation coefficients (ICCs) for all motions ranged from .87 to .98. The ICCs for the intertester reliability of PROM measurements of all shoulder motion ranged from .26 to .89. These findings suggest that reliable measures of PROM of the shoulder can be obtained using standard goniometry in a proper position.

• Journal of the Korea Fashion and Costume Design Association
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• v.17 no.3
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• pp.45-60
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• 2015

The purpose of this study is to classify individualism-collectivism into groups and analyze the difference of attitude toward uniform and evaluation criteria toward uniform. Questionnaires are being administered to 369 middle and high school girls in Deagu province. The Frequency, factor analysis, reliability analysis, cluster analysis, correlation analysis, ANOVA, Duncan-test, and t-test are used for data analysis. Individualism-collectivism factors are found to be other focus, individuality focus, competition consciousness, love of family, and self-esteem. Attitude toward uniform are categorized into fashion pursuit, symbol of role, conformity, color, and neatness. Evaluation criteria toward uniform is categorized into 7 factors: practicality, care, promotion, aesthetics, service, brand focus, and regulation focus. Individualism-collectivism are classify into three groups such as high individualism-collectivism, low individuality, and high individuality. Individualism-collectivism shows a significant correlation with the sub-variable attitude toward uniform and evaluation criteria toward uniform. The groups show a significant difference in the attitude toward uniform and evaluation criteria toward uniform. There is a significant difference among individualism-collectivism, attitude toward uniform, and evaluation criteria toward uniform by the middle and high school girls.

• Journal of Korean society of Dental Hygiene
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• v.15 no.4
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• pp.641-648
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• 2015

Objectives: The purpose of the study is to investigate the relationship between emotional labor, burnout and turnover intention in the dental hygienists. Methods: A self-reported questionnaire was completed by 326 dental hygienists in Seoul and Gyeonggido from September to October, 2013. The collected data were analyzed by SPSS/WIN 15.0 program. The questionnaire consisted of nine questions of the general characteristics of the subjects, ten questions of turnover intention, and fourteen questions of burnout. Each question was measured by Likert 5 point scale. Results: There was a significant difference in workplace and monthly income which had an impact on emotional expression(p<0.05). There was a significant difference in current workplace and monthly income which had an impact on emotional dissonance(p<0.05). Burnout had a significant difference(p<0.05) in age, religion, and turnover intention current workplace, employment condition, and the number of turnover. There was a positive correlation between burnout and turnover intention. It was shown that Emotional labor had a positive correlation with burnout and turnover intention and the explanation power was 18.1%. Conclusions: The dental hygienists are one of the most vulnerable emotional labor workers and are apt to feel exhaustion from the job and turnover intention. It is necessary to prepare for the burnout and turnover intention in the dental hygienists.

• Proceedings of the Technology Innovation Conference
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• 1999.12a
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• pp.296-327
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• 1999

Nowadays, there is a huge need of an extensive study to understand features and behavior modes of consumers who have an indefinite potential of purchase and to make EC a bullish market, Recently, the flow construct has been proposed as important for understanding consumer behavior on the cyber space. The purpose of this study is threefold. To investigate (1) the effect of the flow experience when navigating Internet shopping-mall sites and Internet on purchase intention and relational factors of this (2) the difference in the flow experiences between during the time of navigating Internet and during the time of navigating Internet shopping-mall sites. (3) the difference in purchase intention and relational factors of this between an experiential flow and a purposeful flow. The results show that (1) increase of the purchase intention on EC (or relational factors of this) in proportion to the degree of cognition of users' flow experience (2) By the separate motive of searching Internet shopping-mall sites, the flow experiences during the time of navigating Internet lead to different results (3) Although the difference in the purchase intention on EC between subjects is nonsignificant, it suggests that we need to focus on the fact that the correlation between the purchase intention on EC and the purposeful flow experience on Internet shopping-mall sites is greater than any other correlation. In the end of this study, The theoretical and practical implications of the study, limitations of the study, and future research implications are discussed.