• 한국직업건강간호학회지
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• 제24권2호
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• pp.103-113
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• 2015

Purpose: This study was to construct a structural equational model for explaining and predicting job stress of intensive care unit (ICU) nurses based on the Integrated model of stress of Ivancevich and Matteson (1980). Methods: The subjects of this study were 220 nurses at ICU. The data were collected from August 5 to 30, 2013 through self-reporting questionnaire survey. Results: According to the hypothetical model of this study, perceived nursing practice environment, perceived role conflict, perceived transformational leadership and perceived self-esteem showed statistically significant effects on job stress of ICU nurses directly. Professional self-concept indirectly affect job stress of ICU nurses. In conclusion, job stress of ICU nurses was directly influenced by nursing practice environment, role conflict, transformational leadership and self-esteem. Professional self-concept of the relationships among variables did not have a direct impact on job stress. Conclusion: Based on the results of this study, it is needed to develop stress management measures and programs considering these variables in order to adequately manage job stress of ICU nurses.

• 한국항공운항학회지
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• 제30권2호
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• pp.70-77
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• 2022

This study is a study to analyze the stress difference of pilots according to the category of aircraft. According to previous studies, pilot stress is affected by several factors such as flight time, fatigue regulation, and operating environment, and it is known that stress also affects cardiac variability. In this paper, we analyzed that there is a difference in stress according to the operating environment through airline pilots and pilots of educational institutions, and then tested the difference in stress between airplane pilots and helicopter pilots. This study differs in that it is a study that has almost no empirical research on pilot fatigue and stress considering the role of flight crew members and operational conditions for each mission. If we expand and verify the sample of the results for the stress difference in the future, it will be a great contribution to practical aviation safety research in connection with the fatigue risk management system in the future.

• 한국물환경학회지
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• 제24권1호
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• pp.99-106
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• 2008

With globally increasing interests in climate-soil-vegetation system, a new stochastic model of soil water and plant water stress is derived for better understanding of the soil water and plant water stress dynamics and their role in water-controlled ecosystem. The steady-state assumption is used for simplifying the equations. The derived model is simple yet realistic that it can account for the essential features of the system. The model represents the general characteristics of rainfall, soil, and vegetation; i.e. the soil moisture constitutes the decrease form of the steady-state and the plant water stress becomes increasing with the steady state when the rainfall is decreased. With this model, further deep study for the effects of soil water and plant water stress on the system will be accomplished.

• 농업과학연구
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• 제44권1호
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• pp.123-132
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• 2017

Nowadays, many people suffer from stress because of their jobs, studies, traffic, etc. Daily stress may cause many diseases (Garrett, 1991). One of the methods for reducing stress is experiencing a natural environment (Frumkin, 2001). Cibodas botanical garden (CBG) is one of the most famous travel destinations in Bogor, Indonesia. CBG has the potential for tourism activities. However, an economic assessment is required to verify their sustainability. The research objectives of this study were to identify the characteristics of tourism utilization in CBG, to analyze the economic tourism value of CBG, and to measure the effectiveness of traveling to a natural environment for reducing stress. The research method used was the survey. This study used three data analysis methods: (1) descriptive analysis which was used to identify the characteristics of tourists, (2) travel cost method (TCM), and (3) contingent valuation method (CVM). Results showed some differences in the characteristics of foreign and domestic tourists respondents in age, educational background, income level, number of dependents, and the frequency of their visits. CBG has a high economic value, amounting to IDR (Indonesian Rupiah) 5,508,932,605,405 or approximately USD (United State Dollar) 413,000,000. WTP (Willingness to Pay) of domestic tourist respondents was IDR 29,702 or USD 2.2 per visit, while the value of foreign tourist respondents reached IDR 39,700 or USD 2.9 per visit. Respondents found it preferable to pay more for tickets (WTP value) than to buy medication to reduce their stress.

• 한국융합학회논문지
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• 제8권8호
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• pp.105-114
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• 2017

본 연구는 임상 간호사 개인이 지각하는 환자관련 스트레스와 직무탈진의 관계에서 직무환경이 미치는 융합적 상호작용을 확인하기 위해 시도되었다. 본 연구의 대상자는 서울소재 상급종합병원에 근무하는 168명의 간호사였으며 자료는 2014년 7월 1일부터 15일까지 편의표집 되었다. 구조화된 설문지로 환자관련 스트레스, 직무환경, 직무탈진을 측정하였다. 연구결과 환자관련 스트레스는 직무탈진을 증가시키고 있었다. 환자관련 스트레스와 직무탈진의 관계에서 직무환경 요인의 역할을 분석한 결과 업무부하가 낮을수록 그리고 통제감, 보상, 공정성, 가치가 높을수록 환자관련 스트레스가 직무탈진에 미치는 부정적 영향이 감소하는 조절효과를 보여주었고, 커뮤니티는 직무탈진을 낮추는 주효과를 보여주었다. 이상의 연구결과로 볼 때 간호사의 직무탈진 완화를 위해 병원 차원의 직무환경 개선전략이 필요할 것으로 보인다.

• 한국환경보건학회지
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• 제34권2호
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• pp.117-123
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• 2008

Allergic diseases have been dramarically increased over recent years, especially in industrialized countries. Oxidative stress has been believed to playa significant role in the occurrence of the allergic inflammatory responses. Although previous studies concerning oxidative stress and systemic inflammation have been reported, few data is available, and other allergic diseases, except for asthma, are hardly studied about the association with oxidative stress. This study evaluated the relationship between allergic disease and Malondialdehyde (MDA) as an indicator of oxidative stress. The study population was 197 male adults living in an industrial area. The ISAAC questionnaire was used to confirm wheezing and rhinitis, and atopy was evaluated by skin prick test. MDA was analyzed by spectrophotometer. To examine bronchial hyperresponsiveness (BHR), methacholine test was performed, and the index of bronchial responsiveness (BR index) was calculated. We used multivariate logistic regression model and general linear model with SAS program. We found significant associations of MDA with brindex (p=0.023), rhinitis (p=0.016), atopy (p=0.03), adjusted by age, smoking, and body mass index (BMI). On the contrary, there was no significant difference of MDA with the status of asthma. Our result suggests that oxidative stress may playa major role in the occurrence of allergic response in male adults.

• 한국산업보건학회지
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• 제30권2호
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• pp.196-204
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• 2020

Objective: Chronic obstructive pulmonary disease(COPD) is characterized by persistent airflow limitations associated with chronic inflammatory response due to noxious particles or gases in the lung. Increasing oxidative stress associated with COPD. The aim of this study was to evaluate the influencing factors of biomarkers for oxidative stress in retired miners with COPD. Methods: The levels of total peroxide(TPx), total antioxidant capacity(TAC), and oxidative stress index(TPx/TAC ratio, OSI) in plasma as biomarkers for oxidative stress, serum C-reactive protein(CRP) as a biomarker for inflammation, and general characteristics were measured in 93 male subjects with COPD. COPD was defined as post bronchodilator FEV₁/FVC<0.7 by spirometry. Results: Mean levels of TPx(p=0.013), TAC(p=0.010), OSI(p=0.040), and CRP(p=0.024) were higher in current smokers. Levels of TPx(β=0.445, p<0.001), TAC(β=0.490, p<0.001), and OSI(β=0.351, p<0.001) were related to CRP levels, and CRP levels were related to %FEV₁ predicted(β=-0.295, p=0.003) and current smoking(β=0.214, p=0.032). Conclusions: These results suggest that oxidative stress was related to inflammation, and inflammation were related to decreasing %FEV₁ predicted and current smoking in retired miners with COPD.

• 한국직업건강간호학회지
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• 제24권2호
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• pp.114-121
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• 2015

Purpose: The purpose of this study was to assess the psychosocial work environment of hospital nurses to identify influences of psychosocial work environment on stress, depression, sleep disorder, and burnout. Methods: A total of 219 nurses working in one hospital were surveyed by using the Korean version of the Copenhagen Psychosocial Questionnaire (COPSOQ-K) mental health and psychosocial work environment. The impact of the psychosocial work environment on mental health was analyzed using multiple regression. Results: Mental health variables are correlated with each other. The psychosocial work environment variables and mental health variables are mostly correlated. To assess the psychosocial work environment that affects mental health the most, multiple regression was used. Work-family conflict was the most powerful explanation of all the mental health variables. Work pace, social community at work, mutual trust among employees, predictability, and influence were found to be affecting some mental health variables. Conclusion: To improve the mental health of nurses, it is necessary to consider work pace, social community at work, mutual trust among employees, predictability, influence focus on work-family conflict.

• 한국실내디자인학회논문집
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• 제36호
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• pp.76-83
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• 2003

The purpose of this study is to know how to improve environment of multi-bed room by investigating and analysing factors influencing to patients. 1 measured stress and satisfaction degrees about patient room for 4ㆍ5ㆍ6ㆍ7 men of domestic general hospital wards. The results of research show that patients of 4 bed room appeared the fewest stress and highest satisfaction degree among patients of other room styles. The patients positioned between two beds can give us more stress and fewer satisfaction than others. These results have proven that 4 bed room patients are offering comfortable environment than any other room types as a healing environment. When patient room area are more than 7.3$M^2$ per 1 person, bed interval space is more than 120cm, there is curtain between bed, transit space such as a toilet were established in patient room, patients' satisfaction appeared high.

• 한국정밀공학회지
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• 제21권4호
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• pp.148-153
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• 2004

It is well-known that the mechanical behavior of fiber-reinforced composites under hydrostatic pressure environment is different from that of atmospheric pressure environment. It is also known that the mechanical behavior of fiber-reinforced composites is affected by a strain rate. In this work, we investigated the effect of strain rate on the compressive elastic modulus, fracture stress, and fracture strain of carbon/epoxy composites under hydrostatic pressure environment. The material used in the compressive test was unidirectional carbon/epoxy composites and the hydrostatic pressures applied was 270㎫. Compressive tests were performed applying three strain rates of 0.05％/sec, 0.25％/sec, and 0.55％/sec. The results showed that the elastic modulus increased with increasing strain rate while the fracture stress was little affected by the strain rate. The results also showed that the fracture strain decreased with increasing strain rate.