• Journal of Korean society of Dental Hygiene
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• v.17 no.6
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• pp.1121-1134
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• 2017

Objectives: The purpose of this study is to analyze the factors affecting the self-perceived halitosis of adults and to utilize them as basic data for the development of prevention and management program to reduce of self-perceived halitosis. Methods: A questionnaire survey of 301 adults in their 20s and 50s living in Gwangju and Jeonnam selected by convenience sampling from July 1, 2017 to August 31, 2017 was conducted to investigate oral health status and behavior, fatigue and perceived stress. Statistical analysis was performed using frequency analysis, independent t-test, one way ANOVA, Pearson's correlation analysis, and multiple regression analysis. Results: The degree of self-perceived halitosis was higher in married (2.51) and unemployed (2.71), with tongue brushing (2.68), intention to participate in halitosis education (2.57), taking medication (2.73), coated tongue (2.82) and there was both otolaryngology and gastrointestinal disease (2.72) and periodontal disease (2.89) (p<0.05). Fatigue (${\beta}=0.237$), periodontal disease (${\beta}=0.196$), and coated tongue (${\beta}=0.237$) affect the self-perceived halitosis (p<0.001). Conclusions: The self-perceived halitosis in adults was correlated with fatigue and perceived stress. Also fatigue, periodontal disease, coated tongue factors were analyzed as factors influencing self-perceived halitosis. Additional studies such as prevention and management of periodontal disease and coated tongue, which is a factor of self-perceived halitosis in adults, and development of programs to reduce self-perceived halitosis for fatigue management, which is an external factor, are necessary.

• Journal of the Ergonomics Society of Korea
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• v.32 no.1
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• pp.139-144
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• 2013

Objective: The current study investigated a non-obtrusive measure for detecting physical fatigue based on the analysis of formant frequencies of human voice. Background: Fatigue has been considered as a main cause in industrial and traffic accidents. Therefore, it is critical to detect worker's fatigue for accident prevention. Method: After running exercises on a treadmill, participants were instructed to read a sentence and their voices were recorded under four different physical fatigue levels. Korean vowels of "아", "어", "오", "우", and "이" from the voice recorded were then used to collect formant 1 frequencies. Results: Results of separate ANOVAs showed a significant main effect of physical fatigue on formant 1 frequency of "아", "어", and "이". Furthermore, post-hoc comparisons revealed that formant 1 frequency of "아" was most sensitive to physical fatigue level employed in this experiment. Conclusion: Formant 1 frequencies of some vowels significantly decrease as the physical fatigue level increases. Application: Potential application of this study includes the development of a measure of physical fatigue state that is free from sensor attachment and requires little preparation.

• Korean Journal of Adult Nursing
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• v.28 no.4
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• pp.378-387
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• 2016

Purpose: The purpose of this study was to describe the impact of fatigue and distress on self-efficacy among breast cancer survivors and to provide a base for development of nursing intervention strategy to improve self-efficacy. Methods: A descriptive research design was used. The subjects were 158 patients who were either being treated or were receiving follow-up care at a university breast center in D City from May 30 to August 30, 2014. Structured questionnaires, Revised Piper Fatigue Scale, Distress Thermometer, and Self-Efficacy Scale for Self-Management of Breast Cancer were used to measure fatigue, distress, and self-efficacy. Data were analyzed using t-test, ANOVA, Pearson's correlation coefficients, and multiple regressions. Results: The mean scores of fatigue, distress, and self-efficacy were 3.83, 4.31, and 3.77, respectively. There were significant differences among participants in terms of educational background, current treatment methods, perceived health status, economic burden for fatigue and perceived health status for distress. Self-efficacy was impacted by age, educational background, marital status, average monthly income, perceived health status, and medical expenses. Fatigue, age, and the burden on medical expense had the most impact on self-efficacy, accounting for 17% of the variance. Conclusion: Fatigue should be managed to improve self-efficacy of breast cancer survivors. Therefore, nursing programs designed to decrease fatigue may be helpful.

• Journal of Korean Academy of Nursing
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• v.37 no.3
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• pp.365-372
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• 2007

Purpose: The purpose of this study was to identify degrees of fatigue and influencing factors for fatigue in cancer patients. Method: Data was collected by questionnaires from 115 cancer patients at 3 hospitals in Seoul. The research instruments utilized in this study were fatigue, physical symptoms, depression, family support, and health promoting behaviors. Data was analyzed using the pearson correlation, t-test, ANOVA, and stepwise multiple regression with SPSS/WIN 12.0. Result: The mean score of fatigue for cancer patients was 12.90(range: 6-36). Fatigue for cancer patients according to age group and weight change showed a significant difference. Fatigue for cancer patients showed a significantly positive correlation to physical symptoms and depression. There was a negative correlation between family support and health promoting behaviors. The significant factors influencing fatigue for cancer patients were physical symptoms, health promoting behaviors, depression, and age group, which explained about 45.9%. Conclusion: The results suggest that symptoms and depression management, nursing interventions and practices for providing health promoting behaviors according to age are needed to manage the fatigue in cancer patients.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.31 no.4
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• pp.126-132
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• 2023

During the COVID-19 pandemic, there have been many changes in the aviation industry as a whole. Passenger traffic has decreased, but on the contrary, the international transport demand for cargo planes has never been higher. Due to their geopolitical location when flying to major cities around the world, Korea's international pilots are bound to have relatively more jet lag-causing routes than their American or European-based pilots. Through this study, we tried to analyze the degree of fatigue and fatigue weighting factors according to operating conditions for domestic pilots. As a result of the study, the following conclusions were drawn. Despite the variety of models, routes, and fatigue between individuals, it was found that the 3 Pilot operation route was concentrated as a representative fatigue route. Most of the individual fatigue improvement request sections showed higher fatigue as the night flight section was longer among the 3Pilot routes for more than 12 hours, and 43 out of 90 participants (Korean Air pilots) focused on 3Pilot (two captains and one pilot) as fatigue-intensive operating conditions. Therefore, it proposes an improvement in the system of applying 12-hour unification standards according to Korea's geopolitical international operating conditions and time difference standards.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.35 no.2
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• pp.88-97
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• 2012

The muscle strengths in various postures are still used in the workplace, although mechanization and automation have been continuously accomplished. The aim of this study is to measure the maximum muscle strength and analyze the muscle fatigue during the various wrench jobs which are one of the upper limbs related works. Four hundreds and eighty five college students (243 males and 242 females) participated in this study. Twelve muscle strengths which are using for pulling, pushing, lifting and lowering the wrench with various postures are measured. For every moment, the muscle strengths for both hands were measured. In each measurement, five seconds averaged value and peak value were collected. The averaged value of preferred hand and non-preferred hand was compared. Also, the averaged value of opposite movement was compared through t-test. The fatigue of agonist for each movement was analyzed using EMG analysis. The result of this study can provide some basic information not only in designing the tools in work but also in selection, training and management of workers.

• Journal of Korean Society for Quality Management
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• v.45 no.3
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• pp.393-401
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• 2017

Purpose: The purpose of this study is to propose retrofit measures for KDX-II KVLS hull crack, also, enhance safety and quality of ship. Also, this study suggest to how to retrofit about hull crack of the ship and how to improve operability of the ship. Methods: Retrofit measures of KDX-II KVLS hull crack reach a conclusion through global structure analysis and fatigue analysis. Concerned about thermal deformation due to welding around the KVLS, in addition to, verify to safety of KVLS. Results: Based on result of global structure analysis establish retrofit measures for KDX-II KVLS hull crack. Additionally, through fatigue analysis establish final retrofit measures. The results of retrofit measures are allowed both stress level and fatigue life. Conclusion: Retrofit measures for ship hull crack based on global structure analysis and fatigue analysis improves operability and quality of the ship. Especially, KDX-II ship is the best battleship in our country. Considering the importance of KDX-II, this study improves both Korea navy's combat power and ability to carry out the mission.

• The Korean Journal of Health Service Management
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• v.6 no.2
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• pp.91-99
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• 2012

The aims of this study were to investigate the relationship of depression, fatigue and quality of life (QOL) in middle-aged adults in Jinju city. This survey was conducted from October to November, 2010 and 230 responses from the survey were used. The data was analyzed by descriptive statistics, t-test, ANOVA, Pearson correlation, and stepwise multiple regression. The average score of the participants' depression was $13.16{\pm}8.26$ out of 60. the average fatigue score was $21.46{\pm}4.79$ out of 44. The average QOL score was $85.90{\pm}9.49$ out of 130. Among general characteristic of the participants level of QOL was statistically significant for gender, educational level, exercise. There was a significantly corrleation among depression, fatigue and QOL. The results revealed that depression, educational level, exercise were the significant predictors to affect the QOL in middle-aged adults. Low level of depression, higher educational background, and active exercise were closely correlated with QOL. To improve QOL in middle-aged adulthoods for the community, the programs which include lowering depression, encouraging exercise should be designed.

• Proceedings of the Safety Management and Science Conference
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• 2008.11a
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• pp.303-316
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• 2008

For the past 25 years, Korean semiconductor has experienced enormous growth to be the highest production country in the world. Semiconductor industry is very time sensitive and driven by technology and process, and requires 24-hour full operation. The environment includes many different types of equipment, utilities, different gases and toxic chemicals as well as high voltage electricity. We have performed a survey with 3-shift engineers and workers in one line. The content of the questionnaire was about the correlation between fatigue and performance shaping factor (work type and work ability), and as a result we were able to deduce the correlation, p-value and the pattern of scatter plot. The shape of the model was made of 4 blocks for fatigue, 5 blocks for work type and 5 blocks for work ability, i. e. 14 blocks in total. As a conclusion to this findings, there was a correlation between fatigue and work type and work ability specifically in semiconductor industry, and we need some effort to reduce this.

• Journal of Korean Academy of Fundamentals of Nursing
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• v.22 no.4
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• pp.387-397
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• 2015

Purpose: This study aimed to evaluate nutritional status and fatigue, and to identify the relationship between nutritional status and fatigue in gynecological cancer patients receiving chemotherapy. Methods: Participants were 106 outpatients who had uterine, ovary, or breast cancer and a descriptive cross-sectional design was used. Nutritional indicators including biochemical and anthropometric measures, the Subjective Global Assessment (SGA) scale, and the Piper's Revised Fatigue Scale were completed. Results: About thirty-nine percent of the patients were malnourished based on the SGA. Serum hemoglobin and total lymphocyte levels were less than the normal ranges, although anthropometrics were normal. The women experienced moderate fatigue with a mean score of $5.84{\pm}2.00$. Nutritional status was significantly different by age, education, employment status, and monthly income. The women also had different nutritional status and fatigue depending on the type of cancer and chemotherapy. Fatigue was significantly related to SGA scores, serum hemoglobin, triceps skinfold thickness and mid-arm muscle circumference. Conclusion: The results of this study highlight an urgent need to provide adequate nutritional support and fatigue management with individualized strategies for gynecological cancer patients on chemotherapy.