• Journal of the Korean Wood Science and Technology
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• v.45 no.3
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• pp.250-257
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• 2017

Eight hydrolyzable tannin compounds, such as gallic acid (1), methyl gallate (2), kurigalin (3), 1,2,3,6-tetra-O-galloyl-${\beta}$-D-(+)-glucose (4), 1,2,3,4,6-penta-O-galloyl-${\beta}$-D-(+)-glucose (5), 6-m-digalloyl-1,2,3,4,6-penta-O-galloyl-${\beta}$-D-(+)-glucose (6), isocorilagin (7), macabarterin (8), were isolated from the EtOAc and $H_2O$ soluble fractions of Katsura tree (Cercidiphyllum japonicum) leaves, wood and bark. Then antioxidative and anti-inflammatory activity were evaluated on the each isolated compound. The antioxidative test was DPPH radical scavenging activity and all of the isolated compounds indicated much higher antioxidative values compare to the controls, BHT and ${\alpha}$-tocopherol. In the anti-inflammatory test measuring nitric oxide (NO) inhibition activity, methyl gallate, 1,2,3,6-tetra-O-galloyl-${\beta}$-D-glucose and 1,2,3,4,6-penta-O-galloyl-${\beta}$-D-glucose inhibited NO production, and especially, methyl gallate showed high inhibition activity. However, the anti-inflammatory activity of the hydrolyzable tannins did not show positive effect. Based on the above results, the hydrolyzable tannins of katsura tree may be used as one of the natural biomass sources that can substitute with the synthetic antioxidant.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.6
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• pp.155-164
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• 2017

The purpose of this study is to identify correlations among married nurses' parenting stress, job involvement and intent to stay, as well as to clarify factors that affect nurses' intent to stay. This is a descriptive study conducted based on evaluation of 174 married nurses from one university hospital and two general hospitals (200 beds or above) located in C region, all of who had at least one child <6 years of age. Data were collected from Aug 20 until Sep 15, 2016, after which data were analyzed by aT-test, ANOVA, Pearson's coefficient, and stepwise multiple regression. The mean score of parenting stress was $2.67{\pm}0.54$ out of 4, while that of job involvement was $3.11{\pm}0.58$ out of 5, and intent to stay was $3.56{\pm}0.79$ out of 5. Intent to stay was significantly negatively correlated with parenting stress(r=-0.186, p=0.014), while it was positively correlated with job involvement(r=0.345, p<0.001). Factors influencing intent to stay were education level(${\beta}=0.28$, p=0.042), job satisfaction(${\beta}=0.60$, p<0.001), weekend work(${\beta}=0.20$, p=0.042), job involvement(${\beta}=0.31$, p<0.001) and parenting stress(${\beta}=-0.22$, p=0.038). These factors explained 36.8% of intent to stay(F=21.18, p<0.001). Overall, the results indicate that intervention strategies may be necessary to increase intent to stay by reducing parenting stress and enhancing job involvement.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.3
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• pp.1989-2001
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• 2015

This study was conducted to identify the recognition for nursing competency importance, nursing competency level, and their influencing factors of nurses in the long-term care hospitals. Participants were 243 nurses who were working in the 11 long-term care hospitals. Data were collected from August 25 to September 3, 2014. Data were analyzed using descriptive statistics, t-test, ANOVA, Pearson's correlation and multiple regression by SPSS 19.0. Mean scores of the recognition for nursing competency importance and nursing competency level were $4.21{\pm}0.48$ and $3.47{\pm}0.46$ respectively. Nursing competency level was significantly lower than the recognition for nursing competency importance. The variable influencing the recognition for nursing competency importance was the position(${\beta}=.19$). The variables influencing the nursing competency level were the recognition of nursing competency importance (${\beta}=.37$), age (${\beta}=.20$), current work experience (${\beta}=.13$), health status (${\beta}=.13$). The results suggest the need of developing measurement tool and nursing competency enhancement programs which can well reflect the characteristics of nursing competency required in the long-term care hospital.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.5
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• pp.617-625
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• 2017

This study examined the influence of self-efficacy and critical thinking disposition on the self-leadership of nursing students. The research subjects were114 nursing students in D city and K province. The data werecollected from November 9 to November 27, 2015, and analyzed by an independent t-test, one-way ANOVA, Pearson's correlation, and Stepwise multiple regression using the IBM SPSS/Win 20.0 program. The results showed that self-efficacy was 3.73, critical thinking disposition was 3.73, and self-leadership was 3.73. The self-leadership has positive correlations with self-efficacy and critical thinking disposition. Self-efficacy(${\beta}=.277$, p<.008), critical thinking disposition(${\beta}=.274$, p=.006), grade(${\beta}=.273$, p<.001), religion(${\beta}=.163$, p=.023),motivation of nursing(${\beta}=-.155$, p=.033) explained 45.6% of total variance of self-leadership of nursing students. The most significant predictor of self-leadership were self-efficacy, followed by critical thinking disposition. Therefore, it is necessary to develop aneducation program to improve the self-efficacy and critical thinking disposition of nursing students.

• Journal of Digital Convergence
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• v.12 no.6
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• pp.491-500
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• 2014

This study aimed to assess the influence of burnout with satisfaction of basic psychological needs among nurses. From oct, 25, 2013 to nov, 25, 2013, participants included 160 nurses from 6 major general hospital located in urban areas in Korea. Data for basic psychological needs and burnout were collected through a self-reported questionnaire and were analyzed with independent t-test and analysis of variance, Pearson's correlation analysis, and multiple linear regression analysis. This study shows negative correlations between burnout and autonomy(r=-.45, P<.001), competency(r=-.52, P<.001), relatedness(r=-.49, P<.001). The variables predicting burnout were autonomy(${\beta}=-.26$), competency(${\beta}=-.30$), relatedness(${\beta}=-.12$), age(${\beta}=-.17$), number of service years(${\beta}=.09$). These variables accounted for 34.3% of the variance of burnout in nurses. Our results indicated that it is necessary to increase basic psycological needs to decrease burnout. Therefore nursing managers should develop programs in order to increase autonomy, relatedness and competency.

• Journal of the Korea Convergence Society
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• v.9 no.6
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• pp.299-310
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• 2018

A Convergence study was conducted to investigate the factors influencing the health-related quality of life in patients with chronic neck pain and to present a strategy for effective program development. The participants of this study were 92 patients with chronic neck pain in a region and collected data by self-reported questionnaire. Data were analyzed using PASW 18.0 program, that descriptive statistics, t-test, ANOVA, correlation analysis and stepwise multiple regression analysis were performed. According to the results of stepwise multiple regression, the identified influencing factors were disability(${\beta}=-.403$, p<.001), depression(${\beta}=-.313$, p<.001), age(${\beta}=-.194$, p=.008), muscle disorder(${\beta}=-.176$, p=.009), education(${\beta}=-.151$, p=.043) with health-related quality of life in patients with chronic neck pain. The explanatory power($R^2$) by 5 variables was 67.1%(F=38.118, p<.001). It was found that it is important to consider the individual characteristics, physical function improvement and psychological support for improving the health-related quality of life in patients with chronic neck pain. Therefore, it is necessary to develop a health promotion program based on the factors influencing on the health-related quality of life and analyze its application effect.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.12
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• pp.589-596
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• 2017

The purpose of this study was to investigate factors affecting employment stress among Emergency Department students and reduce stress of employment. A questionnaire survey was administered to 276 students who experienced clinical practice among 4 emergency college students in Jeollabuk-do and Jeollanam-do at 4-year and 3-year colleges from September 10 to 15, 2017. Statistical analysis was performed using the SPSS 18.0 program and analyzed by t-test, ANOVA, Pearson's correlation coefficient, and multiple regression analysis. In the results, there were significantly negative correlations between clinical training stress and major satisfaction (r=-0.192, p=0.001), significantly positive correlations between career stress and clinical training stress (r=0.222, p<0.001), and significantly negative correlations between career stress and major satisfaction (r=-0.245, p<0.001). In the multi-regression analysis, the following was discovered: higher clinical training stress (${\beta}=0.157$, p=0.005), lower major satisfaction (${\beta}=-0.211$, p<0.001), and higher career stress. Junior students (${\beta}=0.237$, p<0.001) and senior students (${\beta}=0.288$, p<0.001) had the highest career stress. Subjects with medium-level financial status had high career stress (${\beta}=0.173$, p=0.012). Therefore, this study suggests that colleges should reduce clinical training stress among emergency medical technology students, and more job support centers should be opened and job management programs developed.

• The Journal of the Korea Contents Association
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• v.19 no.1
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• pp.316-328
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• 2019

The purpose of this study is to identify the factors affecting marriage motivation in colleger and to provide basic data for the countermeasures for decrease in marriage rate. The subjects of this study were 175 colleger from K-do. Data were collected from October 1st to October 10th, 2018 and analyzed using IBM SPSS WIN/21.0 to get frequency, percentage, average, standard deviation, t-test, ANOVA, Pearson correlation coefficient, and Multiple regression. The subjects' view on marriage was 3.35 points, view on children was 3.11 points, psycosocial maturity was 2.99, social pre-parental role recognition was 3.46, and marriage motivation was 2.81. The marriage motivation of the subjects was positively correlated with view on marriage (r=.38, p<.001), view on children (r=.50, p<.001) and psychosocial maturity (r=0.25, p=.001), and psychosocial maturity was positively correlated with social pre-parental role. The most important factor that affects the subjects' marriage motivation is their view on children (${\beta}=.407$, p<.001), followed by view on marriage (${\beta}=.329$, p<001), Gender (${\beta}=-.184$, p=.004), psychosocial maturity (${\beta}=.159$, p=009), religion (${\beta}=.126$, p=.003). The explanatory power was 52.1% (F=26.01, p<001). Therefore, a program promoting the views on children and marriage to improve marriage motivation, a customized program considering gender and religio, and further research promoting marriage motivation is needed.

• Journal of the Korean Applied Science and Technology
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• v.36 no.3
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• pp.726-736
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• 2019

The purpose of this study is to investigate the effect of University hospital nurses' self-efficacy and job performance on job satisfaction. The subjects of this study were 130 nurses working at a university hospital in C city and collected data using structured questionnaires. The collected data were analyzed using mean, standard deviation, t-test, ANOVA, Pearson's correlation and multiple regression analysis using spss 25.0. The results showed that the self-efficacy was 3.24 points for the average score, 2.74 points for the job performance, and 3.10 points for the job satisfaction. Self-efficacy, job performance, and job satisfaction were statistically correlated. The factors affecting job satisfaction were self-efficacy (${\beta}=.39$, p<.001), age at 30~34 years (${\beta}=-.27$, p=.001), Operating Room(${\beta}=-.17$, p=.029), Medical ward (${\beta}=-.17$, p=.025) and unmarried (${\beta}=-.20$, p=.012) and the explanatory power of the model was 30.4%. Based on the results of this study, it is necessary to develop a program to improve the job satisfaction considering the self-efficacy, age, working department of hospital nurse.

• Journal of the Korean GEO-environmental Society
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• v.9 no.7
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• pp.45-51
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• 2008

Triaxial compression tests on anisotropic rock specimens are carried out to investigate the failure strength characteristic of anisotropic rocks. The test core specimens were obtained in Daegu region. Test specimens are rock cores with the 7 different angles of bedding plane. The applied confining pressures were 5, 10, 20, 30, 40 MPa, and the rate of displacement was adopted 0.1%/min to fail the specimen within 5-15 min. The results were analyzed by using the failure criteria for anisotropic rocks proposed by Hoek & Brown (1980) and Jaeger (1960). The results of this study are summerised as follows: The results of inherent anisotropy show the shoulder type of anisotropy, and the effect of anisotropy is reduced as the confining pressure increases. The compressive strength of anisotropic rock shows the highest value at the ${\beta}$ (the angle of bedding plane) = $0^{\circ}$ and $90^{\circ}$ and the lowest value at $30^{\circ}$. The Hoek & Brown failure criterion for anisotropic rocks gives a relatively good agreement with the measured strength in all the range of ${\beta}$ angles, but the theory of Jaeger shows a reasonable agreement only in the range of ${\beta}=15^{\circ}$ and $45^{\circ}$.