• Korean Journal of Occupational Health Nursing
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• v.30 no.4
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• pp.216-223
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• 2021

Purpose: To evaluate the effect of a gymnastics program for eight weeks to maintain better body composition and decrease fatigue among factory workers. Methods: Data were collected in 54 female workers in their 50s and 60s in a factory located in the S city of the K region between April and July in 2019. The subjects were divided into two groups: 1) experimental group (n=27) received a 30 minute-gymnastics program three times per week, and 2) control group participated in lecture series about the principle and effect of the gymnastics program. Body composition and fatigue levels were measured before and after the intervention and analyzed using the SPSS 23.0 program. To evaluate the differences in demographic and clinical characteristics between the experimental and control groups, the chi-squared test and the t-test were used. Repeated measures two-way ANOVA was performed to evaluate the change between outcomes of the pre-and post-investigation. Pairwise comparisons were used to assess the differences between the groups and the time. Results: There are statistically significant differences in body fat mass (p<.001), body fat percentage (p<.001), basal metabolic rate (p<.001), and body mass index (p<.022) in the experimental group compared to the control group. In particular, there is a significant interaction between the groups and the time in body fat mass (F=6.308, p=.015), basal metabolic rate (F=11.397, p=.001), fatigue (F=6.933, p=.011). Conclusion: Our findings suggest that using the gymnastics program helps women in their 50s and 60s who work in factories promote better body composition and reduce fatigue levels.

• Journal of Acupuncture Research
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• v.29 no.5
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• pp.39-50
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• 2012

Objectives : The purpose of this study was to identify the effects of self-acupressure on the visual health of college students. Methods : A nonequivalent control group pretest-posttest design was used. Participants were determined by OSDI(ocular surface disease index) and the Schirmer test, they were assigned to an experimental group of 22 and control group of 22. The experimental group participated in self-acupressure, which were practiced 2 times a day, 5 days a week for 4 weeks. Results : Scores of ocular surface disease index, Schirmer test and ocular fatigue were significantly better in the experimental group after the intervention compared to the control group. Conclusions : The result indicate that self-acupressure is an effective nursing intervention for improving the dry eye syndrome and decreasing ocular fatigue in college students.

• Journal of Korean Biological Nursing Science
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• v.13 no.1
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• pp.29-36
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• 2011

Purpose: This study was develop an aromatherapy hand massage program and to evaluate the effects of aromatherapy on anxiety, depression, sleep disturbance and fatigue of the institutionalized elderly. Methods: The reserach design was a non-equivalent control group quasi-experimental study. The 42 subjects were divided into 2 groups. Aromatherapy hand massage was administrated to experimental group (N=20), and no treatment was administrated to the control group (N=22). Data was analyzed using the $x^2$-test, paried t-test, unparied t-test in the SPSS/Win 12.0 program package. Results: Experimental group showed significant differences in anxiety (p<.05), depression (p<.001 ), sleep disturbance (p<.05), fatigue (p<.05), with relation to the control group. Conclusion: The results showed that aromatherapy hand massage program was effective on anxiety, depression, sleep disturbance and fatigue of the institutionalized elderly. Thus this reserch suggests that this aromatherapy hand massage could be recommened as nursing intervention for quality of life of the institutionalized elderly.

• Women's Health Nursing
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• v.6 no.2
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• pp.305-315
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• 2000

The purpose of this study was to explore the psychoneuroimmunologic effect of aromatherapy massage and to compare the effect with that of massage. This study is designed as a nonequivalent control group pretest-posttest quasi-experimental study and each twenty postpartum mothers volunteered the experimental group and control group. For experimental group, researcher used massage with 2% Jojova oil mixed with Lavender and Rosemary oil (Bush Boake Allen Inc., USA) for 20 minutes, whereas for control group Jojova oil was used as luburicant for massage. Skin temperature was measured with YSI Tele-thermometer(Simpson electric Co., USA) and the concentration of IgA in salivary was analyzed by immunoturbididimetric assay(Cobas INTEGRA, Roche, Swiss) at pre and post test. Also at this time fatigue were measured by Rhoten Fatigue Scale through self-report. The data were analyzed using SAS and hypothesis was tested with unpaired t-test. The results were as follows : 1) Score of fatigue decreased significantly after use of aromatherapy massage. 2) Skin temperature increased significantly after use of aromatherapy massage. 3) Concentration of salivary IgA increased significantly after use of aromatherapy massage. In conclusion, from the standpoint of psychoneuroimmunologic view, the results suggest that aromatherapy massage have greater effect compared with massage and can be effective nursing intervention to enhance relaxation of mind and body in the postpartum mothers.

• Journal of Korean Academy of Nursing
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• v.34 no.5
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• pp.809-819
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• 2004

Purpose: The purpose of this study was to investigate the effect of a comprehensive rehabilitation program on physical function, immune response, fatigue and quality of life in mastectomy patients. Method: The subjects included fifty-five patients with breast cancer (27 in the control group and 28 in the experimental group). The subjects in the experimental group participated in a comprehensive rehabilitation program for10 weeks, which was composed of 1 session of education, 2 sessions of stress management, 2 sessions of exercise, and 1 session of peer support group activity per week. Result: The results revealed anincrease in shoulder extension, abduction, external rotation, and internal rotation of the affectedupper extremity, and in shoulder extension and abduction of the healthy upper extremity. Also an increase in quality of life and a decrease in fatigue were significantly higher in the experimental group than the control group. However, the results revealed that the natural killer cell ratio of the experimental group increased but there was no significant difference from that of the control group. Conclusion: The 10-week comprehensive rehabilitation program showed a large affirmative effect on physical function, fatigue and quality of life of breast cancer patients after a mastectomy.

• Journal of the Korean Society for Precision Engineering
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• v.20 no.1
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• pp.214-221
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• 2003

In this study, based on the effect of the interaction of fracture mechanics by graphite and fatigue limit phenomena of the microscopic observation various matrix structure, spheroidal ratio, size of graphite and distribution etc. parameters containd with Ductile Cast Iron. Therefore, in this study, different ferrite-pearlite matrix structure and spheroidal ratio of graphite of 70%, 80% and 90%, GCD40, GCD45-1 and GCD45-2 series and three different ferrite-pearlite matrix structure, GCD 45-3, GCD 50, GCD 60 series, all of which contain more than 90% spheroidal ratio of graphite, were used to obtain the correlation between mean size of spheroidal graphite and fatigue strength. (1) 73% pearlite structure had the highest fatigue limitation while 36% pearlite structure had the lowest fatigue limitation among ferrite-pearlite matrix. the increase in spheroidal ratio with increasing fatigue limitation, 90% had the highest, 14.3% increasing more then 10%, distribution range of fatigue life was small in same stress level. (2) (equation omitted) of graphite can be used to predict fatigue limit of Ductile Cast Iron. The Statistical distribution of extreme values of (equation omitted) may be used as a guideline for the control of inclusion size in the steelmaking processes.

• Journal of the Korean Society for Precision Engineering
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• v.11 no.4
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• pp.114-125
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• 1994

Fatigue behavior and life prediction method were presented for themal-mechanical and isothermal low cycle fatigue of 12 Cr forged steel used for high temperature applications. In-phase and out-of-phase thermal-mechanical fatigue test from 350 .deg. C to 600 .deg. C and isothermal low cycle fatigue test at 600 .deg. C, 475 .deg. C, 350 .deg. C were conducted using smooth cylindrical hollow specimen under strain-control with total strain ranges from 0.006 to 0.015. The phase difference between temperature and strain in thermal-mechanical fatigue resulted in significantly shorter fatigue life for out-of-phase than for in-phase. Thermal-mechanical fatigue life predication was made by partitioning the strain ranges of the hysteresis loops and the results of isothermal low cycle fatigue tests which were performed under the combination of slow and fast strain rates. Predicted fatigue lives for out-of-phase using the strain range partitioning method showed an excellent agreement with the actual out-of-phase thermal-mechanical fatigue lives within a factor of 1.5. Conventional strain range partitioning method exhibited a poor accuracy in the prediction of in-phase range partitioning method in a conservative way. By the way life prediction of thermal-mechanical fatigue by Taira's equivalent temperature method and spanning fartor method showed good agreement within out-of-phase thermal-mechanical fatigue.

• Journal of the Korean Institute of Oriental Medical Informatics
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• v.19 no.2
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• pp.21-28
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• 2013

Background The aim of this study is assessing the adaption of the Sasang Constitutional herbal tea to the patient complained fatigue. Method Five times assessments were accomplished for 8 weeks using Chalder fatigue scale and visual analogue scale of health status. Herbal tea was served on the point of 4 weeks from 1st visit. Results Chalder fatigue scale and visual analogue scale of health status were significantly improved. Conclusion Sasang Constitutional herbal tea can be used for the control of chronic fatigue.

• Proceedings of the Korean Society of Machine Tool Engineers Conference
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• 1998.10a
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• pp.115-120
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• 1998

This paper is especially concerned with the weldment between support beam and square bar that plays important roles in control box of Expansion Joint as a bridge structure. Fatigue strength of the weldment is dependent on notch radius from welding defects and material properties. From which, tensile strength($\sigma$ult) and fatigue notch factor(Kf) become important factors to predict fatigue life. The fatigue notch sensitivity(η) for metals can be divided into two types : high and low notch sensitivity. In this work, the Expansion Joint weldment was found to have low notch sensitivity. Fatigue test of real structure was performed up to 106cycles to be compared with predicted endurance limit.

• Proceedings of the KSME Conference
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• 2008.11a
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• pp.1600-1602
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• 2008

Various applications of exoskeleton system are reported in the area of military, healthcare, and industries. More the user gets help from exoskeleton system, more power is consumed. To resolve this design conflict, we suggest an energy efficient exoskeleton system which compensates muscle fatigue in isotonic and isometric contraction conditions. Fatigue compensated exoskeleton significantly reduced muscle fatigue while consumed less operation power. In addition, the level of fatigue compensation can be managed by motor control using various input profile. It can make user customized exoskeleton system.