• Journal of Korean Academy of Nursing Administration
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• v.21 no.2
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• pp.154-163
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• 2015

Purpose: This descriptive study was done to identify factors that influence stress related to clinical practice for nursing students. Methods: Structured questionnaires were used to collect data from 278 students from two nursing colleges located in G metropolitan city and one nursing college in C region. Results: The factors that most influenced stress for the nursing students during their clinical practice were critical thinking disposition, clinical competence, year, and gender. Especially, the result showed that higher critical thinking disposition and clinical competence correlated with lower stress in clinical practice. Conclusion: The results indicate that improving nursing students' critical thinking ability and clinical competence would help to relieve stress during clinical practice and increase the ability to cope with stress efficiently. The development of a variety of teaching and learning strategies and education in both theoretical and clinical practice education would be necessary to achieve this goal.

• Journal of Korean society of Dental Hygiene
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• v.11 no.5
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• pp.823-831
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• 2011

Objectives : This study was to investigate the level of emotional labor and stress on job satisfaction and the significant factors influencing job satisfaction in oral health professional. Methods : Data were obtained from a cross-sectional survey of 297 oral health professional(mean age=$29.95{\pm}8.10$). Participants in the study were recruited when they attended the dental health form in Gwangju. Emotional labor was classified into two factors: external, inner. Stress consisted of four factors: sleep disorder&anxiety, self-confidence, health&vital, social role work. job satisfaction included growth development, stability chase. The data was analysed using t-test, one-way ANOVA, Pearson correlation and multiple regression. Results : The mean score of emotional labor and score was 3.13 out of a maximum 7 points. job satisfaction was negatively correlated with emotional labor and stress. job satisfaction explained 32.0%. Conclusions : Based on the findings, The emotional labor and stress was correlated with job satisfaction. These results suggest that further development should be continued to develop the effective emotional labor and stress to improve the job satisfaction of oral healthcare professional.

• Nuclear Engineering and Technology
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• v.48 no.6
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• pp.1412-1422
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• 2016

Austenitic stainless steels (ASSs) are widely used for nuclear pipes as they exhibit a good combination of mechanical properties and corrosion resistance. However, high tensile residual stresses may occur in ASS welds because postweld heat treatment is not generally conducted in order to avoid sensitization, which causes a stress corrosion crack. In this study, round robin analyses on stress intensity factors (SIFs) were carried out to examine the appropriateness of structural integrity assessment methods for ASS pipe welds with two types of circumferential cracks. Typical stress profiles were generated from finite element analyses by considering residual stresses and normal operating conditions. Then, SIFs of cracked ASS pipes were determined by analytical equations represented in fitness-for-service assessment codes as well as reference finite element analyses. The discrepancies of estimated SIFs among round robin participants were confirmed due to different assessment procedures and relevant considerations, as well as the mistakes of participants. The effects of uncertainty factors on SIFs were deducted from sensitivity analyses and, based on the similarity and conservatism compared with detailed finite element analysis results, the R6 code, taking into account the applied internal pressure and combination of stress components, was recommended as the optimum procedure for SIF estimation.

• Journal of Korean Academy of Nursing
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• v.42 no.1
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• pp.136-147
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• 2012

Purpose: This study was conducted to compare the degree of depression between men and women and to identify factors influencing their depression. Methods: Participants in this cross-sectional descriptive study were 263 persons over 65 years old (men: 103, women: 160). Data were collected through face to face interviews using questionnaires and were done in two urban areas in 2010. Research instruments utilized in this study were SGDS, MMSE-K, SRH, FILE, sleep pattern scale, family and friend support scale, and social support scale. Multivariate regression analysis was performed to identify factors influencing depression in elders. Results: The proportions of participants with depression were significantly different between men and women (52.4% vs. 67.5%). Regression model for depression in elderly men significantly accounted for 54%; disease stress (32%), economic stress (10%), perceived health status (4%), and family support, educational level, age, and hypertension. Regression model for depression in elderly women significantly accounted for 47%; disease stress (25%), perceived social loneliness (8%), friend support (5%), family stress (4%), and sleep satisfaction, and family support. Conclusion: Results demonstrate that depression is an important health problem for elders, and show gender differences for factors influencing depression. These results could be used in the developing depression prevention programs.

• Structural Engineering and Mechanics
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• v.56 no.4
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• pp.589-603
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• 2015

The mixed-mode stress intensity factors of 2-D angled cracks are evaluated by Petrov-Galerkin natural element (PG-NE) method in which Voronoi polygon-based Laplace interpolation functions and CS-FE basis functions are used for the trial and test functions respectively. The interaction integral is implemented in a frame of PG-NE method in which the weighting function defined over a crack-tip integral domain is interpolated by Laplace interpolation functions. Two Cartesian coordinate systems are employed and the displacement, strains and stresses which are solved in the grid-oriented coordinate system are transformed to the other coordinate system aligned to the angled crack. The present method is validated through the numerical experiments with the angled edge and center cracks, and the numerical accuracy is examined with respect to the grid density, crack length and angle. Also, the stress intensity factors obtained by the present method are compared with other numerical methods and the exact solution. It is observed from the numerical results that the present method successfully and accurately evaluates the mixed-mode stress intensity factors of 2-D angled cracks for various crack lengths and crack angles.

• Journal of Korean Academy of Fundamentals of Nursing
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• v.17 no.3
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• pp.409-418
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• 2010

Purpose: The purpose of this study was to identify factors affecting professional burnout in intensive care unit (ICU) nurses. Method: Data were obtained through questionnaires from 240 ICU nurses working in hospitals of 500 beds or more in two cities in South Korea. Data analysis was done with t-test, ANOVA, Scheffe test, Pearson correlation coefficients and multiple stepwise regression with SPSS WIN 14.0. Result: Work stress was positively correlated with level of professional burnout and there was a negative correlation between hardiness and professional burnout. Social support was negatively correlated with level of professional burnout. Hardiness had a positive correlation with social support and a negative correlation with work stress. The explained variances for burnout was 44.7% and factors affecting professional burnout in the ICU nurses' were work satisfaction, work stress, social support, and hardiness. Conclusion: The findings indicate that high levels of stress coupled with low levels of hardiness and social support in ICU nurses result in high levels of professional burnout. Reducing work stress and the level of professional burnout in ICU nurses and increasing work satisfaction can be done by enhancing the mediating factors of hardiness and social support through educational efforts and nursing and administrative support.

• Transactions of the Korean Society of Mechanical Engineers
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• v.19 no.4
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• pp.981-989
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• 1995

A new weight function approach to determine SIF(stress intensity factor) using single-layer potential has been presented. The crack surface displacement field was represented by one boundary integral term whose kernel was modified from Kelvin's fundamental solution. The proposed method enables the calculation of SIF using only one SIF solution without any modification for the crack geometries symmetric in two-dimensional plane such as a center crack in a plate with or without an internal hole, double edge cracks, circumferential crack or radial cracks in a pipe. The application procedure to those crack problems is very simple and straightforward with only one SIF solution. The necessary information in the analysis is two reference SIFs. The analysis results using present closed-form solution were in good agreement with those of the literature.

• Transactions of the Korean Society of Automotive Engineers
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• v.24 no.3
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• pp.279-284
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• 2016

Finite element analysis along with DOE scheme has been performed to obtain robust design of crankshaft assembly. This study focused on obtaining optimized fillet radius of crankshaft mainly by statistical approach. 27 design cases using 3 factors with 3 levels are constructed by design of experiment. Changes of design factors and noise factor may influence the durability of crankshaft system. General two stages of robust design may enhance the durability of crankshaft model. Increasing crank arm thickness was adopted as a shrink step and change of fillet radius was used as a shift step. By combining these two steps, the stress concentration at the fillet area is reduced and adequate fillet radius is determined for the robust design of crankshaft.

• Proceedings of the KSME Conference
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• 2000.04a
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• pp.165-169
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• 2000

A simple method was suggested to calculate the stress intensity factor for a one-sided patched crack with finite thickness. To consider out-of-plane bending effect resulting from the load-path eccentricity, the spring constant as a function of the through-thickness coordinate z was calculated from the stress distribution in the un-cracked plate, ${\sigma}_{yy}(y=0,\;z)$, and the displacement for the representative single strip Joint, $u_y(y=0,\;z)$. The stress Intensity factors were obtained using Rose's asymptotic solution approach and compared with the finite element results. In short crack region, two results had a little difference. However, two results were almost same in long crack region. On the other hand, the stress intensity factor using plane stress assumption was more similar to finite element result than plane strain condition.

• Journal of the Korean Society of School Health
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• v.6 no.1
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• pp.78-92
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• 1993

The purpose of this study is to find out the stress causes of the primary students in Korea, through the three major methods, life event score, multiple regression about stress causes and G.H.Q. path-diagram. A survey was made of 889 students who were selected among students of six primary schools in seoul and Ka-pyeng, from Sep. 28 to Oct. 2. 1992. The results of this study are summarized as follows : 1. Life event score Among the children's life events, (deaths of family) (degrade of school record) (the increase of absence days) (divorce of parents) (trouble with relationship) are high ranking in life event score. Besides, (scolded by teacher and parents) (beginning of extracurricular work) are spread stress causes. In conclusion, these stress causes are shown by two aspects, home, school, and so children are under stress circumstance in both places. These stress causes vary with area and sex. 2. Multiple regression about stress causes and G.H.Q. This study analysed how a stress caused by home life affects the children's health of mind and body. The most influential factors are , and these factors vary with area and sex. 3. Path-diagram This study proved that socio-psychological school environment raises children to secede from school, and this secession that operates as a stress cause affects children's health of mind and body. This serial process is analysed by path analysis, and made out a path-diagram. In conclusion, as expected socio-psychological,school environment affects the children's health of mind and body. This is shown by two aspects : positive, negative. This stress causes vary with area and sex.