• Title/Summary/Keyword: T-test analysis

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A Study on the Relationship among Hair Tissue Mineral Analysis, Autonomic Functions and Obesity (모발미네랄검사와 자율신경기능 및 비만도와의 연관성 연구 - 한의학적 변증 응용을 위한 -)

  • Lim, Hyung-Ho;Kim, Ho-Jun;Jin, Sung-Sun;Song, Jae-Chul;Shin, Hyun-Taeg;Song, Yun-Kyung
    • The Journal of Korean Medicine
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    • v.28 no.1 s.69
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    • pp.249-259
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    • 2007
  • Objectives : We performed this study to analyze correlation among hair tissue minaral ratio, autonomic function and obesity. Methods : Subjects were gathered from January 2005 to March 2007. This study was carried out on 263 subjects who had visited Garosero oriental clinic and had no previous cardiovascular disease and thyroid disease. Heart rate variability (HRV) parameters, tissue mineral ratio and obesity degree were statistically compared with correlation and T-test analysis. Results : The results of this study are summarized as follows : 1. Normal group were predominant over obesity group in HRV parameters(SDNN, RMSSD, VLF, LF, HF). 2. Ca/P, Ca/K, Na/K and Fe/Cu, Na/Mg ratio in hair tissue mineral ratio have correlation with BMR, BMI and waist circumference. 3. Ca/P ratio has correlation with LF norm in HRV, and Na/K with HF, Na/Mg with LF, equally. Conclusions : Taken together these results may suggest that there are significant relationships between hair tissue mineral analysis and HRV.

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A Study on the Fluid Mixing Analysis for the Shell Wall Thinning Mitigation by Design Modification of a Feedwater Heater Impingement Baffle (급수가열기 충격판 설계변경에 따른 동체감육 완화에 관한 유동해석 연구)

  • Kim K. H.;Hwang K. M.;Jin T. E.
    • Journal of the Korea Society for Simulation
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    • v.14 no.2
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    • pp.35-43
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    • 2005
  • Feedwater heaters of many nuclear power plants have recently experienced wall thinning damage, which will increase as operating time progresses. As it is judged that the wall thinning damages have generated due to local fluid behavior around the impingement baffle installed in downstream of the high pressure turbine extraction steam line to avoid colliding directly with the tubes, numerical analyses using PHOENICS code were performed for two models with original clogged impingement baffle and modified multi-hole impingement baffle. To identify the relation between wall thinning and fluid behavior, the local velocity components in x-, y-, and z-directions based on the numerical analysis for the model with the clogged impingement baffle were compared with the wall thickness data by ultrasonic test. From the comparison of the numerical analysis results and the wall thickness data, the local velocity component only in the y-direction, and not in the x- and z-direction, was analogous to the wall thinning configuration. From the result of the numerical analysis for the modified impingement baffle to mitigate the shell wall thinning, it was identified that the shell wall thinning may be controlled by the reduction of the local velocity in the y-direction.

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The effects of self-efficacy on job satisfaction of dental technician (치과기공사의 자기효능감이 직무만족에 미치는 영향)

  • Jung, Hyo-Kyung
    • Journal of Technologic Dentistry
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    • v.32 no.2
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    • pp.77-90
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    • 2010
  • Purpose : The purpose of study was to survey self-efficacy and job satisfaction for 500 dental technicians. Methods : The subjects were composed of 500 dental technicians in Daegu Metropolitan city and Gyeong-buk. This study was done using the Statistical Package for Social Sciences 17.0 for Windows. As for the analysis methods, the study used the frequency analysis, percentage, mean, t-test, analysis of variance, multiple regression analysis. Results : Self-efficacy of dental technician shows self confidence(M= 3.56), self regulatory efficacy(M=3.48), task difficulty preference(M=3.46). Job satisfaction of dental technician shows affairs satisfaction(M=3.58), colleague satisfaction(M=3.57), promotion satisfaction(M=3.48), salary satisfaction(M=3.56). Self-efficacy which affect on job satisfation was self confidence and self regulatory efficacy. Conclusion : A sense of self-efficacy and degree of job satisfaction are high when the sense of the degree of job satisfaction could be high only through a high sense of self-efficacy. In order to promote dental technician and dental hygienist of self-efficacy and job satisfaction, education and career and monthly salary is required high.

Development of the Transition Shock Scale for Newly Graduated Nurses (신규간호사의 전환충격 측정도구 개발)

  • Kim, Eun-Young;Yeo, Jung Hee;Yi, Kyeong Im
    • Journal of Korean Academy of Nursing
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    • v.47 no.5
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    • pp.589-599
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    • 2017
  • Purpose: The purpose of this study was to develop a scale to assess the transition shock experienced by newly graduated nurses, and test the validity and reliability of the scale. Methods: The initial items were identified through a review of literature and in-depth interviews with nine newly graduated nurses. Content validation of the items was evaluated by five nurse professors and three nurses. Participants were 269 newly graduated nurses who worked at six acute care hospitals in Busan, Ulsan, and Yangsan, South Korea. Data were analyzed using item analysis, exploratory and confirmatory factor analysis, criterion related validity, and internal consistency. Results: The final scale consisted of 18 items and six factors (conflict between theory and practice, overwhelming workload, loss of social support, shrinking relationship with co-workers, confusion in professional nursing values, and incongruity in work and personal life), which explained 71.3% of the total variance. The six subscale model was validated by confirmatory factor analysis. Cronbach's alpha for the total items was. 89. Convergent validity was evaluated by analyzing total correlation with burnout (r=.71, p<.001) and turnover intention (t=5.84, p<.001). Conclusion: This scale can be used in the development of nursing interventions to reduce the transition shock experienced by newly graduated nurses.

The Influence of Social Face Sensitivity on Vanity and Consumption Behavior (체면민감성이 허영심과 소비행동에 미치는 영향)

  • Park, Eun Hee
    • Human Ecology Research
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    • v.51 no.4
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    • pp.413-424
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    • 2013
  • The purpose of this study is to examine the influence of social face sensitivity on vanity and consumption behavior. Questionnaires were administered to 461 college students living in Deagu Metropolitan City and Kyungbook province. Frequency, factor analysis, reliability analysis, regression analysis, and t-test were used for data analysis. Social face sensitivity was categorized into consciousness of being embarrassed, social formality, other consciousness and prestigiousness. Vanity factors were found as physical price, achievement concern, achievement price, and physical concern. Consumption behavior were categorized into 5 factors such as ostentatious consumption, impulsive buying, external information search, brand trust, utilization of internet information and material-oriented. Consciousness of being embarrassed, social formality, and other consciousness, the sub-variables of social face sensitivity had significant effects on achievement concerns and physical concerns. Other consciousness of social face sensitivity had significant effects on all factors of consumption behaviors. There was significant differences in the prestige of social face sensitivity and physical concerns of vanity and ostentatious consumption, impulsive buying, and also in external information search and utilization of internet information of consumer behavior. This indicates that women showed high physical concerns for vanity and ostentatious consumption, impulsive buying, external information search and utilization of internet information of consumption behavior while men care more about prestigiousness of social face sensitivity.

The Effect of Female Adolescents' Rejection Sensitivity, Impulsivity and Guilt on Binge Eating Behavior (여자 청소년의 거절민감성, 충동성 및 죄책감이 폭식행동에 미치는 영향)

  • Yoon, Chae Rim;Shin, Joo Young;Kim, Jung Min
    • Journal of Families and Better Life
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    • v.32 no.3
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    • pp.31-44
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    • 2014
  • The purpose of this study is to examine the effect of female adolescents' rejection sensitivity, impulsivity and guilt on their binge eating behavior. Questionnaires on rejection sensitivity, impulsivity, guilt and binge eating behavior were administered to 607 female adolescents in Changwon and Ulsan. Of 572 collected copies, 402 were deemed valid and statistically analyzed through frequency analysis, mean and standard deviation, t-test, Pearson's correlation analysis, multiple regression analysis and stepwise multiple regression analysis using SPSS Win 12.0. The results of the study were as follows: 1) School type was found to make a significant difference in rejection sensitivity, overall impulsivity, guilt and binge eating behavior; however, its influence was not significant on the sub-factors of impulsivity: motor impulsivity, unplanned impulsivity and cognitive impulsivity. 2) For female middle school students, rejection anger sensitivity, rejection depression sensitivity and motor impulsivity were found to have a significant influence on binge eating behavior for both middle school and high school girls. Guilt, however, was found to be influential for female high school students only. 3) Impulsivity was found to have a partial mediating effect on the relationship between female adolescents' rejection sensitivity and binge eating behavior.

Effects of Parental Leadership and Verbal Control Modes on Preschool Children's Leadership (부모의 리더십과 언어통제유형이 유아의 리더십에 미치는 영향)

  • Jang, Young Ae
    • The Korean Journal of Community Living Science
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    • v.26 no.2
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    • pp.249-259
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    • 2015
  • This study examines the effects of parental leadership and verbal control modes on preschool children's leadership. The sample included 202 children between the ages of 4 and 5 and their mothers, and data were collected using an index of parental leadership, an index of parental verbal control, and an inventory of preschool children's leadership. A statistical analysis was conducted using a t-test, a correlation analysis, and a multiple regression analysis. According to the results, there were significant differences in preschool children's leadership according to the child's age. According to a correlation analysis, parental leadership and verbal person-oriented control modes had significant positive correlations with preschool children's leadership, and imperative control and position-oriented control modes had negative correlations. In addition, parental leadership and verbal control modes were significant predictors of preschool children's leadership. In particular, parents' communication skill, relationship skill, group activity skill, person-oriented control mode, and position-oriented control mode were significant predictors of preschool children's leadership.

The use of eccentric beam elements in the analysis of slab-on-girder bridges

  • Chan, Tommy H.T.;Chan, Jeffrey H.F.
    • Structural Engineering and Mechanics
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    • v.8 no.1
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    • pp.85-102
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    • 1999
  • With the advent of computer, the finite element method has become a most powerful numerical method for structural analysis. However, bridge designers are reluctant to use it in their designs because of its complex nature and its being time consuming in the preparation of the input data and analyzing the results. This paper describes the development of a computer based finite element model using the idea of eccentric beam elements for the analysis of slab-on-girder bridges. The proposed method is supported by a laboratory test using a reinforced concrete bridge model. Other bridge analytical schemes are also introduced and compared with the proposed method. The main aim of the comparison is to prove the effectiveness of the shell and eccentric beam modelling in the studies of lateral load distribution of slab-on-girder bridges. It is concluded that the proposed finite element method gives a closer to real idealization and its developed computer program, SHECAN, is also very simple to use. It is highly recommended to use it as an analytical tool for the design of slab-on-girder bridges.

A Study on High School Students' Body Satisfaction, Attitude toward Appearance and Clothing (고등학생의 신체만족도, 외모와 의복에 대한 태도에 관한 연구)

  • Lee, Eun-Hee
    • Korean Journal of Human Ecology
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    • v.10 no.1
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    • pp.49-58
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    • 2007
  • The purpose of this study was to investigate to relation between body satisfaction, attitude toward appearance and clothing of high school students. Method of posing a questionnaire is adopted to obtain stochastic data required for pertinent analysis. This is the investigation of which 356(male 169, female 187) high school students located in Choongnam and Junrabookdo province. In this statistical analysis, SPSS 11.5 for Windows Program was utilized to calculate percentage, mean and standard deviation, Factor analysis, Cluster analysis, t-test, One-way Anova, Duncan' multiple range, Pearson's correlation coefficient. The results of this research were as follows: The results of analysing the factors to the response body satisfaction, attitude toward appearance emerged three dimensions(Waist & hip, face, stature & figure part), three dimensions(needs value conformity toward appearance). Sex have significant effects on the body satisfaction, attitude toward appearance and clothing of high school students. Body satisfaction of high school students had an effects on attitude toward appearance and clothing attitude i. e. sexual attractiveness, fashion pursuit, modesty. Body satisfaction had negative correlations with attitude toward appearance and modesty of clothing. However, body satisfaction had positive correlations with sexual attractiveness and self-expression of clothing. As a conclusion, high school students' body satisfaction and attitude toward appearance constituted important characteristics which could affect clothing attitude directly.

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An Analysis of the Body Measurement for Men s Clothing Design (성인 남자의 의복 설계를 위한 신체계측 분석 연구)

  • Lee, Myung-Hee;Jang, Jeong-Ah;Yang, Jin;Park, Jeong-Soon
    • The Research Journal of the Costume Culture
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    • v.4 no.2
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    • pp.265-275
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    • 1996
  • The purpose of this study is to analysis men's measurement and index to provide the fundamental information for he clothing design which can reflect the characteristic of their bodies The items of study were composed 34 items in measurement and 3 1items in index. An anthropometric database used for this study was the 1992 national anthropometric survey of Koreans. The range of sample was 1,059 men from 25 to 55 years old. The results obtained are as follows. 1) Men showed statue to waist height was 5 to 3, statue to trochanter height was 2 to 9 and waist height to torso was 5 to 2.1. 2) We have obtained 8 factors from the result of factor analysis in index. 3) As the result of cluster analysis about somatotype, men were types tow which were contrary to each other. And as the result of t-test between type 1 and type 2, upper body (factor 5), at factors(factor2, 6), and body proportion (factor 4) were intent to each other. Therefore type 1 was peculiar about the factors of 2, 5, 6, and type 2 was about factor.

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