• 한국산업보건학회지
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• 제28권4호
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• pp.374-381
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• 2018

Objective: This study was carried out to examine the factors affecting the fatigue and health promotion behavior of hairdressers and their respective levels. The data were collected from 195 hairdressers working in beauty shops in Daegu and Gyeongsangbuk-do Province using self-administered questionnaires over the period from July 1 to July 31. Methods: A multiple regression model was used to study the factors influencing fatigue and health promotion behavior among hairdressers. Results: This study showed a statistically significant difference in perceived fatigue levels and health promotion behavior according to age, family type, education level, work period, work position, and fatigue level in the past one week. In addition, multiple regression showed that statistically significant factors affecting perceived fatigue were education level, work period, and fatigue level in the past one week. Statistically significant factors affecting health promotion behavior were age and fatigue level in the past one week. The level of perceived fatigue among hairdressers tended to be higher than other workers, and their level of practice of health promotion behavior was generally lower. Conclusions: The improvement of the work environment, such as through the distribution of a proper workload considering workers' characteristics and strengthening of exercise programs to reduce the fatigue level and promote health practices among hairdressers is needed.

• 지역사회간호학회지
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• 제18권2호
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• pp.276-283
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• 2007

Purpose: This present study has been conducted on female workers' shorter working hours in order to look into their fatigue level and the correlation between fatigue and working hours. Method: We surveyed 237 respondents using a questionnaire from June 1st to June 20th, 2005. Results: The means of total fatigue complaint was 3.45. The fatigue level was significantly higher in the lower age group, unmarried group, manager group and shorter working duration group. And the fatigue level was significantly correlated to working hours and work intensity. In the results of stepwise multiple regression, factors affecting the fatigue level were the change of work intensity, age, regular diet habit, working hours and the type of occupation. Conclusion: It is necessary to prepare the health promotion programs, which can reduce female workers' fatigue level and relieve the intensity of their works.

• 부모자녀건강학회지
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• 제4권1호
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• pp.1-18
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• 2001

Fatigue after delivery affect women's birth experience and interrupt the process of labor. Finally woman cannot have a positive birth result and will experience a postpartum fatigue. But researches about fatigue during the labor are lacked. Nurse help adapting a mother's role, bonding with new baby, recovering after birth, and improving woman's quality of life through decreasing fatigue during the labor and intercepting a continued postpartum fatigue. So it is very important that measuring a fatigue and confirming relationships between fatigue and factors affecting fatigue. The purpose of this study was measuring the level of fatigue within 4hours after delivery and identifing factors affecting fatigue. The ultimate goal was to contribute to improving a birth experience and adapting after birth through decreasing the level of fatigue and interventions. The data was collected for this study at the hospital of two universities and the third hospital in Seoul from Aug. 15. to Nov. 10. 2000. The subjects were 106 of mothers who deliveried a normal newborn and were tested within four hours after birth. The instruments were The Visual Analogue Scale for fatigue, The State Anxiety Inventory, and The Labor Support Inventory. The data were analyzed by using percentage, mean, SD, t-test, ANOVA, Pearson correlation. The results of this study were as follows; (1) The level of fatigue during the labor was 61.48point. (2) The deferences according to general and obstetric character affecting fatigue founded that there were Significant differences according to job(t=2.659, p=0.009), and the type of delivery(t=-2.035, p=0.044). (3) The deferences according to factors affecting fatigue revealed that there was significant difference according to quality of sleep(F=2.935, p=0.037). The significant fatigue and the fatigue after delivery was anxiety(r=0.343, p=0.000). The above findings indicate that the level of fatigue during the labor is higher than during pregnancy and postpartum. Woman having a job, delivering by vacuum was more fatigued. The level of fatigue according to a quality of sleep was significant difference. The poor quality of sleep, higher level of fatigue. And the more anxiety after delivery, the more fatigue. So, the variable nursing interventions for lessening the level of fatigue through appling the situation for rest, relaxation during the labor to reserve energy, and decreasing anxiety should be provided for mothers.

• 감성과학
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• 제4권2호
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• pp.63-68
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• 2001

조명 색온도에 따른 작업자의 피로도를 평가하기 위하여 세 종류의 조명 색온도(2700 K, 4000 K, 6500 K)를 실험변수로 하여 모니터상에서 오류수정 작업이 수행되었다. 색온도의 변화에 따른 인체의 영향을 평가하기 위하여 먼저 주관평가와 작업수행도의 상관관계를 분석하였다. 시각피로·정신피로와 집중도에 관한 주관평가를 실시한 결과, 2700 K에서 시각피로 및 정신피로가 가장 적고 집중도가 높으며 작업수행도가 가장 좋았다. 6500 K에서 정신피로를 가장 많이 느끼고 집중도가 제일 낮았으나, 시각피로를 가장 많이 느낀 4000 K에서의 작업수행도가 가장 낮았다. 결과적으로 세 가지 색온도 조건 중 2700 K가 모니터상의 오류수정 작업에 가장 적합하다고 할 수 있다.

• 재활간호학회지
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• 제9권1호
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• pp.81-86
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• 2006

Purpose: The purpose of this study was to investigate the relationship between the level of pain and fatigue in rheumatoid arthritis patients. Method: The subjects for this study were 120 patients registered in S University Hospital, and the period of data collection was from June 20, 2005 to October 15, 2005. Results: The research instruments used in this study were the Graphic Rating Scale of Pain and Fatigue, and the cronbach's ${\alpha}$ of Fatigue scale was .90. In data analysis, SPSSWIN 12.0 program was used for descriptive statistics. The results were as follows. 1) The range of total pain scores was from 10 to 100 and the mean score of the pain in rheumatoid arthritis patients was 53.70. 2) The range of total fatigue scores was from 20 to 58 and the mean score of the fatigue in rheumatoid arthritis patients was 36.04. 3) There was a significant difference in pain according to duration of disease(F=3.934, p<.05). 4) There was a significant difference in fatigue according to duration of disease(F=3.442, p<.05). 5) The level of fatigue was significant correlation with the level of pain in rheumatoid arthritis patients(r=.217, p<.01). Conclusion: The level of fatigue was significant correlation with the level of pain in rheumatoid arthritis patients. Therefore nursing interventions decreasing the pain perceived by rheumatoid arthritis patients are needed to decrease there fatigue levels.

• 한국직업건강간호학회지
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• 제22권3호
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• pp.208-217
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• 2013

Purpose: This study is a correlative study to assess the relationships of fatigue, stress, and burnout among the pregnant nurses in hospital. Methods: The subjects in this study were 103 nurses aged between 22 and 40 who were confirmed as pregnant by the OBGY (Obstetrics and Gynecology) hospital and working at medical facilities located in J-province of G city during the period of July 15 through September 15, 2010. Results: The level of fatigue of pregnant nurses showed an average of 5.60 out of 10 points, and the level of stress showed an average of 25.91. In terms of burnout, the average was 2.72 out of 5 points. The results of the correlative study to assess relationships among fatigue, stress and burnout showed significant positive correlation between burnout and fatigue (r=.47, p<.001) and stress (r=.53, p<.001) and between stress and fatigue (r=.58, p<.001). Therefore, the results show that increased level of fatigue and stress leads to increased level of burnout. Conclusion: The results of the study showed that higher level of fatigue and stress led to higher level of burnout. Therefore, to minimize the burnout of pregnant nurses, many efforts are required in the hospital policy and for the strategies to reduce burnout.

• 대한기계학회논문집
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• 제15권6호
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• pp.1839-1851
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• 1991

Fatigue crack behavior is studied through the two-level rotary bending test with the deep non-through radial holed notch specimens of low carbon steels(SM22C). The main factors investigated are the effects of the damage zone size around crack tip and phenomena of closing or opening of the crack tip. Obtained results are summarized as follows. Fatigue crack behavior in second level stressing slightly lower than fatigue limit is closely related to the size of damage zone produced by the first level stress higher than fatigue limit and to the phenomena of crack closing and opening for the second level stress. The non-propagating crack limit condition depends upon the crack length l$_{1}$ propagated under the first level stress and the magnitude of second level stress .sigma.$_{2}$ lower than the fatigue limit. The non-propagating crack limit condition is expressed by following eq. $\sigma_2^{6.1}{\times}l_{1}=7.35{\times}10^{6}[(kg_{f}mm^{6.1}(mm)]$

• Journal of Mechanical Science and Technology
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• 제18권11호
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• pp.1989-1995
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• 2004

Finite element analysis(FEA) is the most popular numerical method to simulate plasticity-induced fatigue crack closure and can predict fatigue crack closure behavior. Finite element analysis under plane stress state using 4-node isoparametric elements is performed to investigate the detailed closure behavior of fatigue cracks and the numerical results are compared with experimental results. The mesh of constant size elements on the crack surface can not correctly predict the opening level for fatigue crack as shown in the previous works. The crack opening behavior for the size mesh with a linear change shows almost flat stress level after a crack tip has passed by the monotonic plastic zone. The prediction of crack opening level presents a good agreement with published experimental data regardless of stress ratios, which are using the mesh of the elements that are in proportion to the reversed plastic zone size considering the opening stress intensity factors. Numerical interpolation results of finite element analysis can precisely predict the crack opening level. This method shows a good agreement with the experimental data regardless of the stress ratios and kinds of materials.

• 한국항공운항학회지
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• 제20권1호
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• pp.76-85
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• 2012

Air traffic controllers often experience fatigue and stress on the job due to work-related factors. Performance impairment resulting from fatigue and stress is an important concern for aviation safety. The goal of this research was to investigate fatigue and stress factors for air traffic controllers. The research involved an extensive literature review of fatigue and stress in the air traffic control environment and surveyed fatigue and job stress level of Korean air traffic controllers compared to other occupation groups. Results of survey showed that fatigue and stress levels of air traffic controllers were significantly higher than other occupation groups. Specially air traffic controllers reported that night work created high level of fatigue and perceived that physical environment and job demand induced high level of stress. In addition, implications for fatigue and stress management were discussed.

• Composites Research
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• 제12권2호
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• pp.62-69
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• 1999

복합재료가 피로하중을 받으면 재료 내부에 손상이 누적되며, 이는 재료의 물성 변화로 나타난다. 본 연구에서는 손상을 나타내는 인자로 피로계수를 사용하였다. 피로계수와 참고계수로 정의되는 손상함수로부터 복합재료의 피로수명 예측을 이론적으로 연구하였다. 제안된 모델들은 인가 응력 수준, 피로주기 및 피로수명의 함수로 유도하였다. 예측 결과는 유리섬유/에폭시 복합재료와 유리섬유/폴리에스터 복합재료를 사용한 다중응력 피로 실험 데이터를 이용하여 검증하였다.