• Journal of Acupuncture Research
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• v.39 no.3
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• pp.170-181
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• 2022

This review evaluated the efficacy of electroacupuncture (EA) for chronic fatigue syndrome. Randomized controlled trials (RCTs) using EA as an intervention for patients with chronic fatigue syndrome were identified in 6 databases (PUBMED, EMBASE, CNKI, J-STAGE, KMBASE, OASIS). Fatigue indicators were used as the primary outcome measures. The quality-of-life index, efficiency rate, and level of pain were used as secondary outcome measures. There were 408 patients from seven RCTs included in this study. Meta-analysis showed that EA was significantly associated with fatigue relief compared with the control group (n = 141 SMD = -1.55, 95% CI; -2.58 - -0.52, p = 0.003, I² = 92%). In addition, EA had a statistically significant improvement in quality of life compared with the control group (n = 176, SMD = -2.29, 95% CI; -3.68 - -0.90, p = 0.001, I² = 96%). One study reported ten cases of bleeding, however, no serious adverse events were reported in any of the included studies. This review determined that EA may have a greater clinical effect than the control group for fatigue relief and improved quality of life. However, there were several risks of bias identified. Not all of the RCTs accurately reported the research method, all studies were conducted in 1 country (China), and the number of studies included were small.

• Wind and Structures
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• v.16 no.3
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• pp.263-278
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• 2013

The fatigue load of a turbine blade has become more important because the size of commercial wind turbines has increased dramatically in the past 30 years. The reduction of the fatigue load can result in an increase in operational efficiency. This paper numerically investigates the load reduction of large wind turbine blades using active aerodynamic load control devices, namely trailing edge flaps. The PD and LQG controllers are used to determine the trailing edge flap angle; the difference between the root bending moment and its mean value during turbulent wind conditions is used as the error signal of the controllers. By numerically analyzing the effect of the trailing edge flaps on the wind turbines, a reduction of 30-50% in the standard deviation of the root bending moment was achieved. This result implies a reduction in the fatigue damage on the wind turbines, which allows the turbine blade lengths to be increased without exceeding the designed fatigue damage limit.

• The Korean Journal of Health Service Management
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• v.12 no.4
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• pp.229-239
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• 2018

Objectives: This study aimed to investigate the effects of auricular acupressure on fatigue and depression among patients undergoing chemotherapy for breast cancer. Methods: A nonequivalent control group nonsynchronized design was employed. Data were collected from December 2017 to May 2018, in the cancer center at a hospital located in B city. The experimental group received auricular acupressure four times a day, for 5 days, followed by a 2-day rest period. The control group received routine nursing care. The data were analyzed with independent t-tests, using the SPSS 21.0 program. Results: The level of fatigue and depression was lower in the experimental group as compared to that in the control group(t=5.29, p<.001; t=2.21, p=.038, respectively). However, depression scores increased post-intervention in the experimental group, as compared to the pre-intervention scores. Conclusions: The findings confirmed that auricular acupressure decreased fatigue however, depression scores increased post-intervention in the experimental group, as compared to the pre-intervention.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.36 no.2
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• pp.203-210
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• 2012

The main rotor control system is an important structural part of a helicopter that manages the thrust and control force of the helicopter. The main rotor control system consists of a swashplate assembly, scissor assembly, pitch rod assembly, guide, etc. The main rotor control system must endure various loads, such as the thrust and control force, and must meet the optimized fatigue safety life. The rotating swashplate is an important structure influenced by the pitch rod load and rotating scissor load. In this paper, the accuracy of a result about the rotating swashplate part of the main rotor control system is proven through comparison between fatigue test and FEM results. Based on this result, we estimate the lifetime and deduce the fatigue safe lifetime.

• Journal of Korean Academy of Nursing
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• v.45 no.4
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• pp.587-594
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• 2015

Purpose: To identify the effects of foot reflexology massage on fatigue, stress and depression of postpartum women. Methods: A nonequivalent control group pre-post design was used. A total of 70 women in a postpartum care center were recruited and were assigned to the experimental group (35) or control group (35). Foot reflexology massage was provided to the experimental group once a day for three days. Data were collected before and after the intervention program which was carried out from December, 2013 to February, 2014. Data were analyzed using Chi-square test, Fisher's exact test, and t-test. Results: The level of fatigue in the experimental group was significantly lower than the control group (t= - 2.74, p=.008). The level of cortisol in the urine of women in the experimental group was significantly lower than the control group (t= - 2.19, p=.032). The level of depression in the experimental group was significantly lower than the control group (t= - 3.00, p=.004). Conclusion: The results show that the foot reflexology massage is an effective nursing intervention to relieve fatigue, stress, and depression for postpartum women.

• Journal of Korean Clinical Nursing Research
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• v.21 no.2
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• pp.180-187
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• 2015

Purpose: This study was done to identify the effects of semen sinapsis albae acupressure on fatigue and sleep among patients undergoing chemotherapy for breast neoplasms. Methods: The design was a nonequivalent control group nonsynchronized design. Participants were 46 hospitalized patients (23 in the experimental group and 23 in the control group) who were undergoing chemotherapy during November and December 2014. The experimental group underwent routine chemotherapy nursing care and at the same time received acupressure on the spots of Zoksamli, Samumgyo and Shinmun. The control group underwent routine chemotherapy nursing care. The data were analyzed using test and t-test with the SPSS 21.0 program. Results: The level of fatigue in the experimental group was lower than in the control group (t=5.82, p<.001). The level of sleep in the experimental group was higher than in the control group (t=-5.16, p<.001). Conclusion: The findings of the study indicate that acupressure is an effective nursing intervention to decrease fatigue and increase sleep in patients with breast neoplasm undergoing chemotherapy.

• Journal of Korean Academy of Fundamentals of Nursing
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• v.9 no.2
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• pp.226-236
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• 2002

Purpose: The purpose of this study was to investigate the effects of aromatherapy on the level of anxiety and fatigue in student nurses who were undergoing their first clinical practice. Method: A non-equivalent. control group. pretest-posttest design was used. A convenience sample of 42 student nurses were selected. They were assigned to experimental and control groups. The aromatherapy using lavender, geranium and camomile was given to the experimental group for four consecutive days while the control group only rested. Result: 1. Anxiety scores for the experimental group were significantly lower than those of the control group on the $2^{nd},\;3^{rd}$ and $4^{th}$ days of clinical practice. 2. Fatigue scores for the experimental group were significantly lower than those of the control group on the $2^{nd},\;3^{rd}$ and $4^{th}$ day of clinical practice. Conclusion: The results support the conclusion that aromatherapy using selected essential oils is an effective intervention for relieving anxiety and fatigue in student nurses experiencing their first clinical practice. However differences between aromatherapy and massage were not clear. Further investigation needs to be done.

• Journal of Korean Public Health Nursing
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• v.22 no.2
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• pp.224-236
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• 2008

Purpose: The principal objective of this study was to assess the relationships of depression, fatigue, BMI, and health locus of control between urban and rural female middle school students. Methods: The study subjects included 377 girls in randomly-sampled middle schools in urban and rural provinces. The data were collected via self-recorded questionnaires from April 21.- to May 2. 2008, and analyzed using the SPSS Win 12.0 program. Results; 1) The mean score of depression was $10.22{\pm}5.72$ (urban), $10.81{\pm}4.92$ (rural). 2) The mean fatigue score was $50.43{\pm}1.57$ (urban), $51.90{\pm}9.70$ (rural). 3) BMI was classified into 3 groups: leptosomic, normal weight, and obesity groups. The mean BMI score was $18.73{\pm}2.05$ (Seoul), and $20.31{\pm}3.26$ (provincial). 4) The internal locus of control was higher than the external locus of control (urban). 5) Fatigue was correlated with depression (r=.512, p=.000) in both areas. The health locus of control was correlated with Fatigue (r=.153, p=.042) in province. Conclusion: An effective program to reduce the levels of fatigue and depression for middle school girls and to maintain normal weight is required. In particular, the high-risk depression group can be managed through community mental health care center deep interviews, and close observation.

• The Journal of Internal Korean Medicine
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• v.11 no.2
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• pp.80-93
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• 1990

Review of Literature on Languor and fatigue. According to comparative studies of Oriental and Western medical Literature on the Languor and fatigue on causes and symptom, flowing results were obtained. 1. Common etiologies of the Languor and fatigue in Western medicine are firstly exhaustion of energy, secondly variation of control center-neurotic and body fluid control-, thirdly variation of a living body physico chemical state, forthly production of middle metabolic product, fifthly psychological instability. 2. The expression of the Languor and fatigue in Oriental medicine are consumption, dificiency of vital energy(氣虛), illness caused by overexertion and dificiency of essence of life(精虛). The caure of the Languor and fatigue are dificiency in spleen and stomach(脾胃虛弱), dificiency of both the lung and kidney(肺腎兩虛), the six excessive(六淫), irregular life and excessive mental labor. 3. The symptomes of the Languor and fatigue in western medicine are systemic feeling of fatigue, dislike of work, Dizziness, general fatigue, anorexia, painful body, nerveous prostration. anxiety and decrese of energy, and in oriental medicine dificiency of vital energy, general pain, sinking of vital energy(氣虛下階) in adequate nutrition, confusion and slow speaking.

• Korean Journal of Applied Biomechanics
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• v.24 no.2
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• pp.111-119
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• 2014

The purpose of this study was to investigate the effects of localized muscle fatigue and whole body fatigue on postural control during single-leg stance after impairment induced by heel raise and the Harvard step test. Thirty-eight university students (19 men: age, $20.1{\pm}0.2$ yrs; height, $175.0{\pm}5.23cm$; weight, $66.8{\pm}5.6kg$; body mass index, $21.8{\pm}1.7kg/m^2$, 19 women: age, $20.6{\pm}1.1yrs$ ; height, $163.6{\pm}6.7cm$; weight, $58.8{\pm}4.6kg$; body mass index, $22.0{\pm}2.2kg/m^2$) were participated in this study. Subjects performed a series of single-leg postural tasks prior to, following, and 24 hours after completing: heel raise or the Harvard step test. This study showed that the root mean squared distance and velocity in the anteroposterior and mediolateral planes of the center of pressure decreased significantly due to heel raise exercise-induced fatigue. Furthermore, the root mean squared distance in the anteroposterior and mediolateral planes, and the 95% confidence ellipse area of the center of pressure also decreased significantly 24 hours after completing the Harvard step test. In conclusion, this study showed that both heel raise exercise- and Harvard step exercise-induced fatigue affects postural control during single-leg stance in AP and ML planes. Furthermore, this study suggests that changes in the postural control strategy may have occurred after the fatigue protocols during single-leg stance. Also vision can attenuate the postural deficits associated with the fatigues. In order to clarify these results, further studies using other equipment and variables are necessary.