• Polymer(Korea)
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• v.25 no.3
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• pp.435-440
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• 2001

The objective of this study was to examine the effect of oxidation inhibitor contents on the work of adhesion, fracture toughness, and impact strength of the unidirectional carbon-carbon composites (C/C composites). The molybdenum disilicide ($MoSi_2$) used as an oxidation inhibitor was impregnated with phenolic resins to improve the anti-oxidation properties of the composites in different concentrations of 4, 12 and 20 wt%. Based on Wilhelmy equation, the work of adhesion of C/C composites was calculated by contact angle methods. Fracture toughness and impact strength were pressured by three-point bending test for the critical intensity factor ($K_IC$) and Izod test method, respectively. As a result, the composites made with $MoSi_2$ resulted in an increasing of both fracture toughness and impact strength. Especially, the composites made with 12 wt% $MoSi_2$ content showed the highest value of London dispersive component, $W_A\;^L$, in work of adhesion, resulting from improving the interfacial adhesion force among fibers, filler, and matrix in this system.

• Korean Journal of Occupational Health Nursing
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• v.26 no.3
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• pp.142-150
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• 2017

Purpose: The purpose of this descriptive, cross-sectional study was to identify the factors affecting health-related quality of life by examining the relationships among posttraumatic stress, health-related work limitations, and family support in firefighters. Methods: The data were collected from 390 firefighters working in four fire stations located in the G district using self-report questionnaires. The collected data were analyzed using descriptive statistics, t-test, one-way ANOVA along with the $Scheff{\acute{e}}$ test, and multiple regression. Results: As per the results of multiple regression analysis, the factors affecting health-related quality of life in firefighters were posttraumatic stress, health-related work limitations, and family support. This model explained 31% of the variance in health-related quality of life (F=30.03, p<.001). Conclusion: Considering the findings of this study, there is a need to reduce posttraumatic stress and health-related work limitations and develop family support toward firefighters.

• Journal of Technologic Dentistry
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• v.23 no.2
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• pp.105-119
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• 2002

This study was designed to grasp the degree of job stress affecting dental technicians and the degree of the symptoms of their job stress. With this in mind, the researcher selected a total of 170 dental technicians living in Seoul and Incheon, conducting a research in a period ranging from August 1,2001, to August 20, 2001. The researcher made use of a structured questionnaire whose reliability and feasibility are proved. The questionnaire is composed of a total of 55 questions: thirteen questions related to the subjects' general characteristics; 28 questions connected to the measurement of job stress and fourteen questions linked with the measurement of job-stress symptoms. The researcher analyzed the findings with the aid of SPSS(Statistical Package for Social Sciences). The research came to draw the following conclusions on the basis of frequency, percentage, T-test, and F-test, multiple regression. I. The analysis into the job stress of the subjects indicates that there is a significant difference in difficult questions among their work places, working hours, academic background, job satisfaction and jobs(P<.05). The job stress stands at 3.48 on the average, and the area of conflict among too much work and job performance turns out to be highly perceived. 2. The analysis into the degree of the symptoms of the job stress of the subjects shows that there is a significant difference in work place, working hours, job satisfaction and the continual maintenance of job(P<.05). The symptoms of job stress accounts for 2.65 on the average. Physical symptoms turn out to be highly perceived; The response 'My arms and legs are killing me' proves to stand for 3.03. 3. The correlation between job stress and the symptoms of job stress turns out to be significant(r=0.519, P<0.001), and there is a significant correlation between the average points of each job-stress area and the average points of the symptoms of job stress. All in all, it is necessary that dental technicians themselves should make positive efforts to control and relieve stress and that more efficient programs should be implemented with a view to dealing with stress.

• Journal of the Korea Convergence Society
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• v.9 no.7
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• pp.347-354
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• 2018

The purpose of this study was to investigate the factors affecting job satisfaction of nurses in nursing care service ward. The subjects were 127 nurses, nursing job satisfaction, nursing intuition, and nursing work environment using the 5 - point Likert scale. Data were analyzed by t-test, ANOVA, correlation and regression analysis using SPSS WIN 23.0 program. The results showed that the correlation between job satisfaction and independent variables in nursing and nursing care service ward was significant in nursing professionalism (r = .90, p <.001) and nursing work environment (r = .75, p <.001). In addition, factors affecting job satisfaction were in the order of nursing professionalism and nursing work environment (F = 31.516, p <.001), and explanatory power was 84.1%. Therefore, Therefore, the necessity of nursing convergency strategy for improvement of these is suggested.

• Journal of the Korea Convergence Society
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• v.9 no.7
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• pp.105-115
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• 2018

This study examined convergence factors influencing the job embeddedness of nurses in general hospitals. Data were collected using a structured questionnaire. Data were analyzed using t-test, ANOVA, Pearson's correlation coefficient, and multiple regression. The job embeddedness in participants showed a significant correlation between job stress (r=-.50, p<.001), meaning of work (r=.70, p<.001), and calling (r=.58, p<.001). The significant factors influencing the job embeddedness were meaning of work (${\beta}=.57$, p<.001) and job stress (${\beta}=-.19$, p=.008); these factors explained 51.2% of the variance. Based on these findings, nursing college need to develop a curriculum to foster meaning of work and calling in clinical practice courses and to remain nurses.

• Journal of the Korea Convergence Society
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• v.11 no.7
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• pp.389-397
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• 2020

This study is a descriptive research to investigate the effects of nurses', job embeddedness and nursing work environment on turnover intention. The participants were conducted in 4 general hospitals with more than 300 hospital beds located in G metropolitan city and targeted 203 nurses who understood and agreed with the purpose of the study, and conducted from october to december 2019. The data were analyzed using SPSS 23.0 program, frequency analyzed t-test, ANOVA, Pearson's correlation, and Multiple regression. The factors influencing on turnover intention of clinical nurses were found to have negative effects on job embeddedness and nursing work environment. Therefore, it is necessary to develop and train programs to increase the job embeddedness of clinical nurses. At the same time, efforts should be made to improve the nursing work environment to reduce the turnover intention of their.

• Journal of Korean Society of Occupational and Environmental Hygiene
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• v.15 no.2
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• pp.114-123
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• 2005

We analyzed the demographic and job features of 197 shipyard workers with work-related musculoskeletal disorders(WMSDs) compensated by the Industrial Accident Compensation Insurance Act, and the features of the disorders, the causes of operation and the induced behaviors. The three shipbuilding companies surveyed were located in Busan Metropolitan city and Gyungsangnam-do. The results were as follows. 1. The ages of WMSDs patients in shipyard were $43.6{\pm}8.6$ and the job tenure was $14.3{\pm}5.6$. The 40's of them was 40.1%, and the 30's was 29.4%. Patients less than 5 year-work duration were 85.3%, and ones more than 16 year-work duration 6.6%. In occupations, welders were 32.5%, pre-welders 17.3%, and setting engineers 6.6%. 2. The causes of WMSDs in shipyard were works(95.4%) and outer crash or accident shock (3.6%). Based on the standard of the NIOSH induced behaviors, the causes were awkward posture (62.9%), excessive movement(19.3%) and repetitive movement(13.7%). 3. The compensated WMSDs by body part was the highest, 36%, in the spines, 32.0% in both the upper limbs and the spines, and 14% in the upper limbs. The number of cases of WMSDs in body were 96 in the cervical, 79 in the lumbar and 72 in the shoulders. 4. As a result of chi-square test(${\chi}^2$) between diagnosis and operation in body, welding and spot welding had the most diagnoses in all parts of the body among other occupations. Chi-square test(${\chi}^2$) between diagnosis and induced behavior in body showed that awkward postures recorded the highest rate and repetitive movements was the second. 5. The most hazardous occupation was the welding(incidence rate=9.7) and the most hazardous behavior was the awkward posture.

• Journal of Korean Academy of Nursing Administration
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• v.12 no.3
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• pp.415-423
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• 2006

Purpose: This study was to identify the effects of the application of elastic compression stockings during the hours of work on edema and pain of lower extremity in hospital nurses. Method: The participants were categorized into three groups, 15 for an experimental group of the application of Thigh-Length (T-L) elastic compression stocking, 15 for another experimental group of the application of Knee-Length(K-L) elastic compression stocking and 15 for a control group. The data were analyzed by $X^{2}-test$, ANOVA, Repeated Measures ANOVA and Sheffe-test using SPSS Win 12.0 program. Result: As a result of the study "There are significant differences in lower extremity edema among three groups." was partly supported. "There are significant differences in girth of ankle after work among three groups." was supported(Rt.:F=4.56, p=.016; Lt.: F=5.82, p=.006). "There are significant differences in girth of calf after work among three groups." was not supported(Rt. : F=1.76, p=.183; Lt. : F=1.94, p=.155) "There are significant differences in lower extremity pain after work among three groups." was supported(Rt. : F=95.33, p=.000; Lt. : F=81.33, p=.000). Conclusion: The results of this study revealed that the application of elastic compression stockings during the hours of work is effective for the relief of edema and pain of lower extremity in hospital nurses.

• Journal of Digital Convergence
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• v.18 no.8
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• pp.293-299
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• 2020

The study aimed to identify convergence effects of nurses' competence of convalescent hospitals. During from July 2019 to August 2019, data were collected from 161 nurses of 8 convalescent hospitals in D city using structured questionnaires. Data were analyzed using SPSS / WIN 25.0 program by t-test, ANOVA, Pearson's correlation, and Stepwise Multiple regression. The findings showed that nursing confidence of nurses at convalescent hospitals was explained 55% by value of work, organizational communication satisfaction, graduate school, no experience of leave of absence, and two shifts work type. The results indicate that to promote nursing competence of participants, it is necessary to improve value of work and organizational communication satisfaction and to provide job training program for re-employed nurses or to graduate school.

• Journal of Families and Better Life
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• v.33 no.5
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• pp.87-102
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• 2015

The purpose of this study was to examine the relationship between job stress, turnover intention, and the moderating roles of motivation for child care work. The subjects were 238 child-care teachers who were worked at child-care centers in Seoul. Questionnaires were used to rate job stress, turnover intention, and the motivation for child care work of teachers. The collected data were mainly analyzed by descriptive statistics, t-test, one-way ANOVA, Duncan test, Pearson's correlation and the multiple regression analysis. The main results of this study were as follows. First, there were differences in turnover intention according to individual characteristics such as career at the current child-care center and total career. Second, job stress was positively correlated with turnover intention, and negatively correlated with active motivation and material motivation. And turnover intention was negatively correlated with active motivation and material motivation. Third, a moderator effect of the active motivation was found in the relationship between the job stress and the turnover intention. Especially the active motivation is suggested to reduce the negative results of job stress and turnover intention. Therefore, the results indicate the importance of the active motivation which is considered as an aptitude, interest, affection for children and self realization when child-care teachers make a decision to enter the child-care work profession.