• Proceedings of the Korean Geotechical Society Conference
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• 한국지반공학회 2009년도 세계 도시지반공학 심포지엄
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• pp.194-205
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• 2009

In geotechnical engineering, the mechanical characteristics of soil, the main material of geotechnical engineering, is highly related to the confining stress. Reduced-scale physical modeling is often conducted to evaluate the performance or to verify the behavior of the geotechnical systems. However, reduced-scale physical modeling cannot replicate the behavior of the full-scale prototype because the reduced-scale causes difference of self weight stress level. Geotechnical centrifuges are commonly used for physical model tests to compensate the model for the stress level. Physical modeling techniques using centrifuge are widely adopted in most of geotechnical engineering fields these days due to its various advantages. In this paper, fundamentals of geotechnical centrifuge modeling and its application area are explained. State-of-the-art geotechnical centrifuge equipment is also described as an example of KOCED geotechnical centrifuge facility at KAIST.

• Women's Health Nursing
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• 제29권1호
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• pp.32-43
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• 2023

Purpose: This study investigated the dietary behavior of experienced shiftwork nurses and aimed to identify factors related to dietary behavior. Methods: This study was a secondary analysis based on the Shift Work Nurses' Health and Turnover study (2018-2021) among Korean nurses. In total, 247 experienced (>12 months) shiftwork nurses were included in this study. The participants' dietary behavior, depression, level of occupational stress, fatigue, physical activity, and general characteristics were measured. Descriptive statistics, Pearson correlation coefficients, independent t-test, one-way analysis of variance, the Kruskal-Wallis test, and multiple regression analysis were conducted. Results: The dietary behavior score of the participants using the Mini-Dietary Assessment Index was 29.35±5.67. Thirty percent of the participants were depressed, the participants experienced moderate occupational stress, and 74.1% of the participants engaged in an inadequate amount of physical activity. The factors influencing shiftwork nurses' dietary behavior were having child(ren) (β=.16, p=.027), depression (β=-.13, p=.032), level of occupational stress related to occupational climate (β=-.13, p=.035), and an inadequate amount of physical activity (β=-.17, p=.006). These factors explained 10.4% of the variance in experienced shiftwork nurses' dietary behavior scores. Conclusion: Experienced nurses with child(ren) tended to have healthier diets. However, a higher level of occupational stress related to occupational climate, depression, and engaging in an inadequate amount of physical activity were associated with a higher risk of having an unhealthy diet. Therefore, strategies are needed to encourage physical activity and alleviate adverse occupational climate and depression among experienced nurses.

• Journal of the Korea Safety Management & Science
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• 제17권2호
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• pp.55-66
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• 2015

In the perspective of industrial health management, it is important for the employee to decrease their job stress, to improve their productivity and quality of labor. In this study, the job stress, and it's influence on PWI(Psychosocial Wellbeing Index) were investigated by the questionnaire survey of 138 industrial workers who had studied assistive technology in college. The contents of questionnaire consist of the demographic characteristics, job-related characteristics, job stress and psycho-social stress. We evaluated job stress by KOSS-SF(Korean Occupational Stress Scale-Sort Form) and psychosocial stress by PWI-SF(Psychosocial Well-being Index-Short Form). To analyze the results, we evaluated the exposure level of KOSS and PWI by demographic characteristics and job-related characteristics using significance tests. Also, we estimated the relationship among demographic characteristics, job-related characteristics, job stress and psychosocial stress, using correlation analysis. As a results, all workers were found to be in a group under the high risky stress. It showed that the scale index of female's job non-autonomy and pwi were much larger than those of male's. Therefore, to guarantee job autonomy of female workers should be more emphasized, to improve their working environment. Job type had significant relationships with many job stress category; physical environment, job demand, job instability and organization culture. Regarding pwi, the scale index of the workers who is in charge of the civil service such as contacting the disabled and the aged in person, were much larger than that of the other workers. Accordingly, the job stress management program including physical environment, job demand, job instability and organization culture, should be suggested, to decrease the stress of the workers in charge of the disabled and the elders service. The strongest predictors of pwi was organization system through maximum positive relations between organization system and pwi. Therefore, it indicates that improvement of organization system such as a fair merit rating, a manpower supply, demand plan and department cooperation is urgently needed to reduce pwi.

• Journal of Korean Foot and Ankle Society
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• 제19권3호
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• pp.128-131
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• 2015

Capsuloligamentous injury at the first metatarsophalangeal (MTP) joint is a common traumatic injury during physical activity, particularly on artificial turf. Mechanism of injury include excessive flexion, extension, or valgus stress. We report a non-operatively treated capsuloligamentous injury at the first MTP joint, which did not occur traumatically but developed by a stress-related mechanism in a collegiate rower.

• Korean Journal of Psychosomatic Medicine
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• 제1권1호
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• pp.45-51
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• 1993

Stress perception was investigated in 53 outpatients with extrinsic type of bronchial asthma, using GARS scale and other questionnaires. 40% of the patients were found to be psychosomatic. The patients were more likely to consider their physical symptoms as severe than the allergist Severity of symptoms rated by the allergist had significantly positive correlation with scores of stress perception related to changes in relationship. However, no significant correlation was found between severity of symptoms rated by patients and scores of stress perception. Psychosomatic group was significantly higher in scores of stress perception related to illness and injury, financial burden, and change or no change in routine than non-psychosomatic group. Female. older age, higher education. presence of religion. and presence of psychological stressors at onset and/or aggravation of the illness were found to increase stress perception. These findings indicate ant extrinsic asthmatics an less likely to perceive psychological stress than physical symptoms, and that they are less vulnerable to psychological stressors than patients with other diseases.

• Health Policy and Management
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• 제26권4호
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• pp.325-332
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• 2016

Background: Workplace violence was recognized to be social problems that might impact the health status and the job satisfaction of employee in hospitals. This study investigated the current status of violence and job stress among hospital employees working at administration and discharging department. Methods: The study subjects were 213 administrative employees working at 20 general hospitals. Data were collected by self-administered questionnaire that included information such as demographics, job-related characteristics, experience of violence, and job stress. The violence was classified as verbal violence, physical threat, and physical violence occurred by patients and caregivers. Analysis of variance, t-tests, correlation analysis, and multiple linear regression analysis were performed to examine the associated factors with job stress. Results: The levels of verbal violence, physical threat, and physical violence were $1.64{\pm}1.08$, $0.54{\pm}0.67$, and $0.04{\pm}0.17$, respectively. The score of job stress was $2.74{\pm}0.50$ and it was associated with age, existence of spouse, drinking frequency, subjective health status, disease history, night-time treatment, and public health administration career in simple analysis. In multiple linear regression analysis, the level of verbal violence experience was significantly associated with job stress (B=0.09, p=0.001). Also physical threats (B=0.18, p<0.001) and physical violence (B=0.48, p=0.008) showed positive association with job stress. Conclusion: This study attempted to examine the association between experience of violence and job stress in administrative employees at medical institutions. Levels of violence showed positive correlation with the job stress. Environment improvement to protect employee from violence and management of employees who experienced workplace violence are needed to reduce the job stress.

• Journal of Korean Biological Nursing Science
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• 제15권1호
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• pp.8-14
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• 2013

Purpose: The purpose of this study was to investigate factors related to obesity of mid-age women and to examine the relationship between obesity and chronic diseases including diabetes, hypertension, and heart disease. Methods: Using data from Korean American adults living in California, we analyzed the health behavior (diet, exercise, smoking, and binge drinking) and psychological stress of obese women with body mass index ${\geq}25$ by using chi-square test. Logistic regression was used to investigate independent effects of obesity on chronic diseases, after controlling for risk factors. Results: The prevalence of obesity appeared about 16.9%. The Obese group was less likely than the non-obese group to eat vegetables and more likely feel psychological stress. There were no significant differences in smoking, alcohol intake, and physical exercise between the two groups. Obesity was strongly related to chronic diseases (OR=4.642, 95% CI=1.328-16.222). Conclusion: This study suggests that obesity of mid-age women could be reduced by encouraging health behavior such as eating vegetables daily, performing physical exercise regularly, and taking care of emotional stress. Diet and physical activity interventions and emotional supports should be developed for weight loss and prevention of weight gain in mid-age women.

• The Journal of Korean Medicine
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• 제32권6호
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• pp.67-73
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• 2011

Objectives: To examine the overview of fatigue-related health conditions in the Korean general population. Methods: Data were collected from 2,203 adults (1,126 men and 1,077 women) via a self-reporting questionnaire and their sleeping, exercise, stress, physical problems, use of functional food, and fatigue status were analyzed. Results: The average sleeping hours was about $6.6{\pm}2.0$ hrs per day, and 24.3% of subjects didn't exercise (over 30 min) in a week. Around 16.5% of subjects were under severe stress, and 46.1% (36.9% male vs. 55.6% female) had had trouble with at least one form of physical distress including dyspepsia, headache or muscular pain. 45.4% (37.2% male vs. 53.9% female) of subjects used functional supplements. 46.3% (42.8% male vs. 50.0% female) of subjects complained of chronic fatigue, and they were significantly different compared with no-fatigue subjects regarding severe stress status (8.6% vs. 24.0%), frequency of physical distress (33.2% vs. 69.9%), and use of functional supplements (41.6% vs. 49.8%). Conclusion: This result first reports the features of fatigue-related health conditions including prevalence of chronic fatigue in the Korean population. This data could be helpful to develop fatigue-focused traditional Korean medicine in the future.

• The Journal of Korean Academy of Orthopedic Manual Physical Therapy
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• 제19권1호
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• pp.9-20
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• 2013

Background: This study was conducted to provide preventive measure for the musculoskeletal disorders in automobile parts manufacturing workers. Method: The author surveyed to the musculoskeletal symptoms prevalence and its related factors from 10th to 17th April 2011 with structured self administered questionnaires. 223 out of 225 collected questionnaires were used for final analysis, excluding 2 questionnaires with no valid response. Based on the diagnostic criteria of NIOSH (National Institute for Occupational and Health), an investigation was made into the prevalence of musculoskeletal symptoms as well as into the factors related to individual items. Results: The prevalence of musculoskeletal symptoms according to the criteria of NIOSH was the highest in the shoulder (52.9%), followed by the neck (39.%), the hand/wrist (35%), the waist (29.6%), the arm/elbow (24.7%), and the leg/food (23.8%). One-way analysis showed that among general characteristics, age was the musculoskeletal risk factor with the greatest effect. Whereas among work-related characteristics, significant risk factor didn't find. Yet it was shown that among ergonomic work postures, high degree of musculoskeletal risk was shown by the posture involving frequent and repetitive movement of the arm and the hand/wrist and also by the posture involving standing for a long time. Multiple regression analysis showed that musculoskeletal risk was 1.795 times higher in those age 50 and over than in those under age 50; 1.67 times higher in the high risk stress group than in the low risk stress group; and 1.131 higher in the group involving the repetitive use of the hand/arm than in the other groups (p<.05). Conclusion: The prevalence and stress score of automobile parts manufacturing workers were higher than other occupation workers. Among general characteristics, drinking and smoking were shown to be related to stress score; while age was shown to have significant effect on musculoskeletal risk.

• Journal of the Korean Home Economics Association
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• 제49권9호
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• pp.111-120
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• 2011

The purpose of this research was to investigate the effects of child, day care, and home variables that influence physical and relational aggression of preschool children. The participants were 338 four and five year olds recruited from day care centers. Children's self-regulation, day care experiences and parenting stress were reported by mothers. Children's aggression and the teacher-child relationships were measured by teachers. The results showed that self-regulation was negatively correlated with physical and relational aggression. Years of day care experiences and parenting stress were positively related with physical and relational aggression. Moreover, teacher-child conflicts were positively associated with physical as well as relational aggression.