• Journal of the Korea Safety Management & Science
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• v.10 no.2
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• pp.15-24
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• 2008

This study was to investigate the relationship of VDT(visual display terminal) work condition and fatigue severity in the financial office workers. Questionnaires were completed by 662 persons in VDT workers of Post Office from January to May 2006. Multidimensional Fatigue Scale(MFS) that was developed in Korea Occupational Safety &Health Agency to estimate the degree of fatigue was used for study. In results, 149 persons(22.5%) in VDT workers were felt low fatigue severity, 351 workers(53.0%) were middle, and 162 workers (24.5%) were high. So it was appeared that one in four VDT workers felt the high fatigue severity. And woman VDT workers felt more fatigue severity than man. Also, fatigue severity was increased with increasing work time. Our findings suggest that VDT workers in financial office need proper health program to prevent occupational fatigue and disease.

• Steel and Composite Structures
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• v.23 no.2
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• pp.239-250
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• 2017

In the concept of two-parameter fatigue failure criterion, the material fatigue failure is determined by the damage degree and the current stress level. Based on this viewpoint, a residual strength degradation model for stud shear connectors under fatigue loads is proposed in this study. First, existing residual strength degradation models and test data are summarized. Next, three series of 11 push-out specimen tests according to the standard push-out test method in Eurocode-4 are performed: the static strength test, the fatigue endurance test and the residual strength test. By introducing the "two-parameter fatigue failure criterion," a residual strength calculation model after cyclic loading is derived, considering the nonlinear fatigue damage and the current stress condition. The parameters are achieved by fitting the data from this study and some literature data. Finally, through verification using several literature reports, the results show that the model can better describe the strength degradation law of stud connectors.

• The Journal of Internal Korean Medicine
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• v.29 no.1
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• pp.219-230
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• 2008

Objectives : Consumption is a chronic wasting disease, in oriental medicine concept. Fatigue is a common symptom experienced by many people who have consumption. However, there has been little study about the relationship between consumption and fatigue in the Oriental medicine. For this reason, we attempted to investigate the present status of fatigue of outpatients, and its relation with consumption index, public health practice index, Chalder fatigue scale and Subjective Symptoms of Fatigue Test. Methods : The subjects were 149 outpatients who complain fatigue between Nov. 1, 2006 and Oct. 31, 2007. We measured degree of consumption by consumption index. We measured degree of fatigue by Chalder fatigue scale and Subjective Symptoms of Fatigue Test. Public health practice were investigated by "Breslow's 7 health practice". Results : Studies have shown that a group who disregard public health practices have higher numerical value, in part of $q\grave{i}-x\bar{u}$, $xu\grave{e}-x\bar{u}$, and Physical symptoms than a group more concerned with public health practice. A group who has fatigue for a period over 6 months are more likely to be $q\grave{i}-x\bar{u}$, $y\bar{i}n-x\bar{u}$, Chalder fatigue scale, neuro-sensory symptoms than a group fatigued for less than 6 months. Among the subjects, 81 (55.5%) were considered as 'fatigue patients' by the Chalder scale. Chalder fatigue scale, according to the Subjective Symptoms of Fatigue Test, consumption also, The more increase of Subjective symptoms of fatigue test, the more of consumption scale. Conclusions : This study has shown that there is a link between consumption and fatigue. Moreover, oriental medicine's consumption is more concrete than fatigue scale, so consumption index will have wide application to the study of fatigue.

• Korean Journal of Occupational Health Nursing
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• v.9 no.2
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• pp.86-93
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• 2000

This study was conducted to find out the degree of tiredness, accumulated tendencies of fatigues in accordance with 3 types of circadian rhythms and 3 types of perceived fatigue signs such as physical, psychological and neurosensory aspects in before and after work at night. Samples were chosen from the 217 intensive care units nurses working in 13 general hospitals which had 3 shift rotating systems, Data were collected from November to December in 1999. Two hundreds seventeen respondents were classified by 3 circadian types such as 59 morning, 110 middle and 48 evening. Circadian type was measured by the circadian type scale which was designed by ${\ddot{O}}stberg$ and Home (1976). in order to estimate the level of tiredness, the investigator used the fatigue checklist designed by the Labor and Health Institute of Japan(1970). Analysis was done by frequency a percentages, ${\chi}^2$ test and repeated measures ANOVA test. The result of this study were as follow: 1. In the general characteristics of the subjects circadian types, moderate type had the large proportion at 50.7% and morning type had 27.2% and evening type had 22.1%. 2. According to the 3 types of fatigue signs, the highest general tendency was 'General weakness' and 'Feeling of headsore' for physically perceived sign, 'Drowsiness' for psychological sign, and 'Uncomfortableness in sight seeing' for neurosensory sign. 3. The most frequently complained fatigue were observed in physical symptoms among physical, mental, and neurosensual symptoms. The percentage of complained was higher after night work than before the work started. 4. There was not any statistical significant difference between the circadian type and the degree of physical, mental, neurosensory fatigue. 5. There was not any statistical significant difference in regarding to each date of night shift except difference between 1st and 2nd days of fatigue perceived physically. Therefore, the study concluded that the fatigue perceived by night shift nurses might be related with shift working condition rather than circadian types.

• Journal of the Korea Convergence Society
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• v.9 no.12
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• pp.281-286
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• 2018

The purpose of this study was to evaluate the degree of heterophoria variations according to visual fatigue induced by increasing number of examinations while repeating binocular vision examinations. Twenty - one adults in their twenties who had no heterotropia other eye disease or systemic disease underwent binocular vision examinations. As the examinations progressed, the degree of heterophoria increased in both orthophoria and heterophoria. When the distance examinations was repeated 5 times, orthophoria increased degree of $1.56{\Delta}$ heterophoria. and heterophoria increased degree of $1.63{\Delta}$ heterophoria. When the near examinations was repeated 5 times, orthophoria increased degree of $1.78{\Delta}$ heterophoria. and heterophoria increased degree of $2{\Delta}$ heterophoria.. As the number of examinations increased, the result gradually deviated from the normal range as visual fatigue increased. The degree of the variation is judged to be enough to make the wrong prescription in the clinic. In conclusion, it was found that the binocular vision examinations should be conducted more accurately and promptly.

• 제어로봇시스템학회:학술대회논문집
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• 2003.10a
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• pp.2471-2474
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• 2003

This paper focuses on the stability and operability of a man-machine system considering a human operator. Some papers' main interest has been the stability only, but the operability such as fatigue is also the other main interest. In a man-machine system, feelings such as motional, visual, and kinesthetic are important since those enable operators to work easily or fatigue operators. A model of a man-machine system has been developed. Motional, visual, and kinesthetic feelings may be considered as feedbacked sensor signals. We also have quantified the degree of fatigue with respect to reference operation. This is a performance index to be optimized. Several methods are presented to optimize the degree of fatigue and the stability of the integrated system. Examples are presented to show that the usefulness of the proposed modeling method and fatigue mitigating algorithm.

• Journal of Korean Academy of Nursing
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• v.37 no.6
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• pp.855-862
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• 2007

Purpose: The purpose of this study was to identify the factors influencing fatigue in patients with chronic obstructive pulmonary disease. Methods: A descriptive correlational study design was used. A convenience sample of 125 subjects was recruited from the outpatient respiratory clinic at a large university hospital. Data was collected from June to October, 2005 using structured questionnaires, an oxygen saturation test, a 6-minute walking test, and a pulmonary function test. Results: Subjects had a slightly low degree of fatigue. The fatigue showed a significant correlation with emotion(r=.589, p= .000), dyspnea(r=.304, p= .001), self-efficacy(r=-.278, p= .002), and symptom experience(r=.238, p= .008). Emotion(34.7%) and dyspnea(5.8%) were significant predictors to explain fatigue. Conclusion: This study provides comprehensive understanding of the influencing factors on fatigue in patients with chronic obstructive pulmonary disease. Nursing interventions to decrease negative emotion and dyspnea for management of fatigue is suggested.

• The Korean Journal of Rehabilitation Nursing
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• v.9 no.2
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• pp.153-160
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• 2006

Purpose: This study was performed to examine present health condition on community clients and the degree of cognition on community oriental health promotion program. Method: Research design is cross-sectional descriptive study, 300 residents who live in S city were selected. The period of data collection was from October 2005 to April 2006. The research instruments used were the VAS of fatigue, headache, pain, Depression, anxiety to examine present physical and psychological health condition and questionnaire on the degree of cognition on Oriental Health Promotion Program. SPSS 10.0 was used for statistics. Results: The range of fatigue, headache, pain, depression, anxiety was 2.09-3.75. The degree of cognition on program was 2.67. As for the degree of cognition on oriental health promotion program according to general characteristics of subject, there was significant difference(F=3.79, p=.038) between below 65 years(2.88) and above 65 years(3.12). Conclusion: We are trying to develop oriental health promotion program fit to property of community, especially elderly.

• Journal of muscle and joint health
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• v.7 no.1
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• pp.131-147
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• 2000

Almost all patients with rheumatic disease experience fatigue. The fatigue affects the patient's life extensively at home and at work, therefore it is necessary to investigate the nature of the fatigue which the patients perceive. The purpose of this study is to explore the nature and pattern of fatigue of the patients with rheumatic diseases. Rheumatoid arthritis is typical disease for its joint involvement which leads to deformity. Whereas lupus is a characteristic systemic autoimmune disease and the fibromyalgia is characterized by the general bodyache and multiple local tenderness. The prevalence of these diseases and the fatigue was known to be higher in women than men. Therefore the subjects were woman patient diagnosed as rheumatoid arthritis, lupus or fibromyalgia, and they were recruited from the H-Rheumatic Disease Hospital. The two instruments, the Multidimensional Assessment of Fatigue by Belza(1995) and the Piper Fatigue Scale by Piper, et al(1995) were used to explore the nature and pattern of self-reported fatigue. In total, the data from 157 patients were analysed by the SPSS-PC program for statistical analysis. The results were as follows: 1. Most patients with rheumatic disease experienced fatigue and the degree of fatigue was at the middle range by the scores of the two instruments. 2. The degree of fatigue of the patients with fibromyalgia was the highest and the next was that of the patients with lupus and the fatigue of the patients with rheumatoid arthritis. But there were no statistically significant differences among the patients with three rheumatic diseases, except the subcategory, the meaning of fatigue of the Piper Fatigue Scale. 3. Even when the period of the symptom and pain were covariated, there were no statistically significant differences among patients with three rheumatic diseases. The fatigue of the patients with lupus and fibromyalgia is rarely investigated in Korea and this study can be the base for the further understanding of the patients with rheumatic diseases. Therefore repeated studies are required to identify the factors to affect the fatigue and to understanding the nature of the diseases and to develop the nursing interventions to alleviate the fatigue.

• Asian Oncology Nursing
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• v.10 no.1
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• pp.30-37
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• 2010

Purpose: The purpose of this study was to identify the relationship between physical activity and fatigue in patients with cancer. Methods: The participants of the study were 118 patients who had been diagnosed with cancer at least more than three months before at a university hospital. Physical activity was measured by IPAQ Korean version (2006), and fatigue by the Revised Piper Fatigue Scale. The collected data were analyzed using frequency, percentage, t-test, ANOVA, Pearson correlation coefficient. Results: Continuous physical activity overall in this study was on average $2,154.03{\pm}2,845.86$ MET, and the overall degree of fatigue of the participants was $4.47{\pm}1.80$. There were significant negative correlations between fatigue and moderate physical activity. Conclusion: The findings of the study suggested that moderate physical activity is effective for improving fatigue in cancer patients.