• The Korean Journal of Emergency Medical Services
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• v.24 no.1
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• pp.103-115
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• 2020

Purpose: This descriptive study investigated the relationship between death awareness and life ethics awareness, according to life stress, among students in the department of paramedics. Methods: General characteristics were identified using means and frequency, and the differences between the two military models were analyzed using the χ²-test and t-test by dividing them into lower and higher groups based on the mean life stress score (99.76 points). Results: Those with high life stress had higher death awareness than those with low life stress at 114.11 points. In contrast, those with low life ethics experienced more severe life stress with a score of 145.61 points (t=-2.609, p=.010)(t=-2.953, p=.003). The death recognition attitude and bioethics according to the degree of living stress-showed a significant correlation between the low and high groups (r=.188, p=.043) (r=.201, p=.042). Conclusion: Paramedic students require education on how to cope with life stress. However, access to education is limited to people living in modern times. As a potential solution to this problem, observing videos on the Internet is recommended. Moreover, we suggest accessing Internet and smart phone applications for advertising/educational purposes.

• The Journal of Korean Physical Therapy
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• v.24 no.3
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• pp.191-197
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• 2012

Purpose: This study investigated the relationship between degree of stress and quality of life in mothers of children with cerebral palsy. Methods: This study's subjects were 77 mothers of children under 10 years of age with cerebral palsy. The instrument is a self-administered, structured, written questionnaire. The tool that measured the degree of stress was created by modifying the questionnaire by Park (2004). Quality of life for all mothers with cerebral palsy was evaluated by the ShortForm-36 Health Questionnaire. To verify the effects on degree of stress and quality of life arising from general characteristics, t-tests and ANOVAs were conducted. The correlation between degree of stress and quality of life was analyzed via Pearson's correlation analysis. Results: The mothers' degree of stress was rated as 2.69 out of 5; their quality of life was rated as 53.07 out of 100. There was a significant negative correlation between quality of life and the age of cerebral palsy and positive correlations between quality of life and mother's age, background, and family income. Degree of stress among mothers has a positive correlation with quality of life. Conclusion: This study provides basic data about the relationship between degree of stress and quality of life in mothers of children with cerebral palsy.

• Journal of Ginseng Research
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• v.44 no.2
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• pp.267-273
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• 2020

Background: Continuous exposure to high temperatures can lead to heat stress. This stress response alters the expression of multiple genes and can contribute to the onset of various diseases. In particular, heat stress induces oxidative stress by increasing the production of reactive oxygen species. The liver is an essential organ that plays a variety of roles, such as detoxification and protein synthesis. Therefore, it is important to protect the liver from oxidative stress caused by heat stress. Korean ginseng has a variety of beneficial biological properties, and our previous studies showed that it provides an effective defense against heat stress. Methods: We investigated the ability of Korean Red Ginseng and Korean black ginseng extracts (JP5 and BG1) to protect against heat stress using a rat model. We then confirmed the active ingredients and mechanism of action using a cell-based model. Results: Heat stress significantly increased gene and protein expression of oxidative stress-related factors such as catalase and SOD2, but treatment with JP5 (Korean Red Ginseng extract) and BG1 (Korean black ginseng extract) abolished this response in both liver tissue and HepG2 cells. In addition, JP5 and BG1 inhibited the expression of inflammatory proteins such as p-NF-κB and tumor necrosis factor alpha-α. In particular, JP5 and BG1 decreased the expression of components of the NLRP3 inflammasome, a key inflammatory signaling factor. Thus, JP5 and BG1 inhibited both oxidative stress and inflammation. Conclusions: JP5 and BG1 protect against oxidative stress and inflammation induced by heat stress and help maintain liver function by preventing liver damage.

• Journal of Korean society of Dental Hygiene
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• v.16 no.3
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• pp.409-415
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• 2016

Objectives: The purpose of the study is to investigate the correlation between stress and oral health in some high school students. Methods: The subjects were 224 students from three high schools in Daejeon, Daecheon, and Incheon. from November to December, 2015. A self-reported questionnaire was filled out from November to December, 2015. The questionnaire consisted of general characteristics of the subjects, awareness toward stress, stress-coping pattern, oral health-related quality of life and oral health care. Data were analyzed by SPSS 18.0 program. Results: In the analysis of academic stress level by the general characteristics and stress level, higher stress group showed higher experience in stress expectation(high group 16.43, subgroup 9.21), internal stress(high group 13.97, subgroup 6.16), expression type stress(high 10.06, sub-4.95). The higher stress group had emotional stress management in stress-coping pattern and less experience in difficulty of tooth brushing, chewing discomfort, and oral health-related quality of life management(p<0.001). Conclusions: The stress had a negative impact on the oral health related quality of life. The high school students should be able to manage the physical and mental stress. It is necessary to provide the continuous oral health care management against the stress by the dental hygienists.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.29 no.2 s.233
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• pp.341-349
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• 2005

Damage often occurs on the surface of railway wheel by wheel-rail contact fatigue. It should be removed before reaching wheel failure, because wheel failure can cause derailment with loss of life and property. The increase or decrease of the contact fatigue life by the metal removal of the contact surface were shown by many researchers, but it has not explained precisely why fatigue life increases or decreases. In this study, the effect of metal removal depth on the contact fatigue life for railway wheel has been evaluated by applying finite element analysis. It has been revealed that the residual stress and the plastic flow are the main factors determining the fatigue life. The railway wheel has the initial residual stress formed during the manufacturing process, and the residual stress is changed by thermal stress induced by braking. It has been found that the initial residual stress determines the amount of metal removal depth. Also, the effects of the initial residual stress and metal removal on the contact fatigue lift has been estimated, and an equation is proposed to decide the optimal metal removal depth for maximizing the contact fatigue life.

• Transactions of the Korean Society of Machine Tool Engineers
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• v.11 no.2
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• pp.43-49
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• 2002

SB41 material is welded automatically and is investigated some effects of the welding residual stress in the growth and propagation of fatigue crack, so as to study the fatigue behaviour in the welding residual stress field. The summarized results are as follows; 1) In case of the load amplitude is constant, as the stress ratio is changing to 0.1, 0.33 and 0.5 the propagation life is constant but the growth life decreases. And than, when maximum load or minimum load is constant as the stress ratio increases the growth life and propagation life. 2) It was shown that fatigue crack propagation ratio da/dN was almost constant regardless of the stress ratio change at constant load amplitude and that the larger stress ratio, the slower was the fatigue crack propagation ratio. 3) The opening ratio U is influenced by $K_max$ but it isn't only the function of $K_max$ because data range is very large. 4) The fatigue life of the specimens on tensile compressive residual stress field was decreased and increased respectably more than that of the base metal.

• Journal of Korean Public Health Nursing
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• v.30 no.3
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• pp.470-482
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• 2016

Purpose: The purpose of this study was to investigate the moderated effects of coping strategies in the relationship between life stress and psychological well-being in university students. Methods: Self-report questionnaires were used to collect the data from 278 university students. The data were analyzed using descriptive statistics, pearson correlation coefficient and hierarchial multiple regression. Results: Psychological well-being is negatively associated with life stress and avoidance coping, and positively associated with problem solving coping. Results showed that there were significant moderated effects of coping strategies in the relationship between life stress and psychological well-being. Under high life stress levels with high problem solving coping and low avoidance coping, there was a high level of psychological well-being. Moreover, life stress and coping strategies interacted well with each other to affect psychological well-being. A negative correlation between life stress and psychological well-being was remarkable for the high problem solving coping group and high avoidance coping group. Conclusion: The study results suggest that in order to improve psychological well-being, it is necessary to provide intervention programs to promote problem solving coping and to reduce the avoidance coping for university students.

• The Journal of Korean Academic Society of Nursing Education
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• v.25 no.1
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• pp.125-135
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• 2019

Purpose: This study was conducted to determine the mediator effect of social support in the association between stress for college life and depression among nursing students. Methods: The participants of the study were 201 university students in A and C cities. Self-report questionnaires were used to measure the variables. In the data analysis, the SPSSWIN 25.0 program was utilized for descriptive statistics, Pearson's correlation, Sobel test and multiple regression analysis. Results: Mean scores of stress for college life, depression and social support were 2.56, 4.12 and 0.61, respectively. Stress for college life and depression showed a significant positive correlation (r=.60, p<.001), while depression and social support showed a significant negative correlation (r=-.46, p<.001). Lastly, stress for college life and social support showed a significant negative correlation (r=-.55, p<.001). The analysis of the mediator effect of social support in the association between stress for college life and depression showed that social support had a significant mediator effect. Conclusion: Among nursing students, social support may be a mediator in the association between stress for college life and depression. Therefore, strategies for nursing intervention to improve social support should be developed for nursing students.

• Journal of the Korean Ceramic Society
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• v.30 no.3
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• pp.229-235
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• 1993

Thermal history and thermal stress of alumina specimen, which occured from thermal shock process, were calculated by finite difference method. Stress intensity factor and crack growth in cyclic thermal fatigue were calculated from single thermal shock temperature history and thermal stress. Cyclic thermal life were estimated by bending strength after cyclic thermal shock under critical thermal shock temperature. Calculated stress intensity factor was compared with real experimental thermal fatigue life of specimen. Fatigue life until critical stress intensity factor and real experimental result were comparable.

• Journal of Families and Better Life
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• v.15 no.4
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• pp.183-200
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• 1997

The purpose of this study was to identify the stress of remarried elderly in their remarried life. There were 10 remarried elderly respondents. The data was collected by in-depth personal interview. Focusing on the situation of remarried family life the remarried elderly perceived various stress. Those were the stress from the status of remarried person and the stress from relations with their own children/ new spouse/ new spouse's children/ ex-spouse and ex-kin/ sibling and relatives and friends. The results of this study could be a useful material for elderly's remarriage preparation program.