• Nuclear Engineering and Technology
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• 제34권2호
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• pp.176-185
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• 2002

A 4-bundle shift refuelling method of CANDU6 F/H (Fuel Handling) System is analyzed to assess the operational flexibility and capacity of F/H system. The current 8-bundle shift refuelling scheme requires to refuel eight fuel bundles from a single fuel channel, and to refuel 14 fuel channels in a week on average assuming that the reactor is in a steady state. The analysis showed that the 4-bundle shift refuelling method increases F/M (Fuelling Machine) duty cycle and operator load. However, the fuellin’g method change from the 8- to 4-bundle shift refuelling ill not require additional team of operators. A marginal increase in the maintenance cost may be resulted in by the change of fuelling method and the increase of fatigue usage factors requires some components to be replaced during the FM lifetime.

• Journal of Nutrition and Health
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• 제47권6호
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• pp.416-425
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• 2014

Purpose: The purpose of this study was to investigate the stress, dietary habits, dietary behaviors, and health-related behavior of nurses. Method: The subjects of this study were 161 nurses studying at a cyber university. The general characteristics, stress, dietary habits, dietary behaviors, and health-related behavior of the subjects were surveyed using a self-administered questionnaire in October, 2010. The subjects were divided into two groups according to the working pattern: shift workers (n = 110) and non-shift workers (n = 51). Results: In the general characteristics, there were significant differences in marriage, monthly income, employment type, and job satisfaction between the two groups. Total stress score did not differ significantly between the two groups. In dietary habits, significant differences in meal regularity, skipping meals, skipping reasons, having regular mealtimes, frequency of snack and the snack time between shift workers and non-shift workers (p<0.05). Total score of dietary behaviors in shift workers was significantly lower than that in non-shift workers (p<0.05). Score of shift workers in taking three meals per day regularly was significantly lower than that of non-shift workers. In health-related behavior, a significant difference in sleeping time was observed between shift workers and non-shift workers. Dietary behavior showed negative correlation with shift work (r = 0.176) and positive correlation with health consciousness (r = 0.210) and perceived health status (r = 0.198) in subjects after adjustment for age, marriage, monthly income, and employment type (p < 0.05). Multiple regression analysis revealed that shift work, health consciousness, and perceived health status affected dietary behavior in subjects. Conclusion: These results indicate that shift working nurses had poor dietary habits and dietary behaviors, and these dietary behaviors are affected by their shift work, health consciousness, and perceive health status.

• 한국산업보건학회지
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• 제29권4호
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• pp.550-561
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• 2019

Objectives: The purpose of this study is to provide basic data for the improvement of the working environment for health prevention and related countermeasures for shift workers. This study was conducted based on the Fifth Korean Working Conditions Survey (KWCS), which analyzed the health effects of shift work forces and compared them with preceding studies. Methods: By analyzing secondary rates using raw data from the 5th KWCS, 4,870 (9.7%) of the 50,184 total study subjects were divided into shift work and 45,314 (90.3%) non-shift work groups based on the response to shift status. Variables that could affect work health issues were identified and corrected. A cross-analysis was conducted to examine demographic characteristics (gender, age, and education level) of the workers and occupation characteristics (monthly net earnings, employment type, occupation, working period up to now, workplace scale, type of work system, and weekly working hours). In order to find the work health issue ratio between the shift and non-shift work groups, logistic regression was analyzed and the association with health problems according to shift type by gender was looked at through cross-analysis. Results: According to the surveys conducted from the 1st KWCS (2006) to the 5th KWCS (2017), the proportion of shift workers continued to increase. Also, muscular pains in the lower limbs (hips, legs, knees, feet, etc.) (OR=1.135, 95%CI 1.031-1.251), headaches, eyestrain (OR=1.580, 95% CI 1.428-1.748), anxiety (OR=1.715, 95% CI 1.402-2.099), difficulty falling asleep (OR=1.391), and other problems (OR=7.392) were reported. In addition, back pain, muscular pains in shoulders, neck and/or upper limbs, muscular pains in lower limbs (hips, legs, knees, feet, etc.), headaches, eyestrain, depression, anxiety, overall fatigue resulted in significant results for both male and female shift workers. Depression and anxiety were higher in female shift/circulation compared to males. Conclusions: The social nets for the health and safety of shift workers should be explored in a variety of ways, including management and supervision of shift sites, attempts to reorganize and improve the shift system, development of workers' health recovery programs, promotion, systematic treatment, and compensation systems.

• 농촌계획
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• 제20권1호
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• pp.127-134
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• 2014

This study, in order to complement instability of analysis result stemming from the choice between reference point and comparison point which is pointed out as the defect of shift-share analysis, conducted shift-share analysis using Gross Regional Domestic Product (GRDP) trend of Geumgang area, Chungcheongnam-do for the period from 2000 to 2011. As a result of the analysis, (1) industries that had both the positive Regional Share Effect (RSE) and Industrial Mixed Effect (IME) were service industries such as manufacturing industry, electricity gas, transportation industry, art, etc., which are positively influencing the regional industry. (2) industries that had both the negative RSE and IME were other service industries such as wholesale and retail businesses, lodging industry, food industry, real estate business and leasing service, business service industry, public administration, etc., which provide basic livelihood services for the residents. (3) industries that had the positive RSE and negative IME were agriculture, forestry and fishery industry, mining industry, construction industry, and educational service industry. (4) industries that had the negative RSE and positive IME were info-communications industry, financial and insurance businesses, health industry, etc.

• 한국직업건강간호학회지
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• 제27권4호
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• pp.191-202
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• 2018

Purpose: This study analyzes the relationship between work-life conflict and turnover intention among hospital nurses. Furthermore, it seeks to determine whether the relationship between the two varies depending on the shift work condition of the nurses. Methods: A total of 435 nurses working at five tertiary hospitals were included in the study. The questionnaire included items on turnover intentions, work-life conflicts, sociodemographic factors, working conditions, and internal and external resources. Results: The level of work-life conflict among shift work nurses was higher than that of non-shift work nurses. The turnover intention was also higher for shift work nurses than for non-shift work nurses. Results from the multivariate logistic regression analysis revealed that the work-life conflict of nurses had a positive relationship with turnover intention. The effect of work-life conflict on turnover intention was greater for shift work nurses than for non-shift work nurses. Conclusion: Work-life conflict had a greater impact on the turnover intention of hospital nurses working under shift work conditions. Based on this study's findings, it can be suggested that, in order to reduce high turnover intention, it will be necessary to make specific efforts to balance work-life conflict and improve working conditions.

• 한국직업건강간호학회지
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• 제29권2호
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• pp.133-139
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• 2020

Purpose: This study aimed to identify the influence of consecutive night-shift work and working time on insomnia among hospital nurses. Methods: A descriptive correlational research designutilizing secondary data analysis was adopted. Data on consecutive night-shift work, working time, and insomnia were collected from 64 hospital nurses using a Fitbit activity tracker and questionnaires, and analyzed using hierarchical logistic regression. Results: Consecutive night-shift work for more than three days had a significant influence on insomnia among hospital nurses. Weekly working hours also accounted significantly for the variance in insomnia, exceeding the influence of consecutive night-shift work. Conclusion: Development and implementation of proper schedules to control consecutive night-shift work and working time is important to alleviate insomnia among hospital nurses.

• 한국직업건강간호학회지
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• 제33권1호
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• pp.1-11
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• 2024

Purpose: This study aimed to analyze the factors influencing the well-being of middle-aged non-shift female workers using health-determinant models. Methods: This study analyzed data from the fifth Korean Working Conditions Survey (KWCS), involving 5,449 participants. A hierarchical multiple regression analysis was employed to examine the relationships between various factors and well-being. Results: The analysis identified key factors affecting well-being in middle-aged female non-shift workers, including supervisor support, presenteeism, satisfaction with the working environment, autonomy in working hours, support from coworkers, workplace discrimination, occupation, work-life balance, sleep problems, workplace size, weekly work hours, and sickness absence. This study confirms that the well-being of middle-aged non-shift female workers is influenced by factors at the individual, social, and community levels as well as by conditions related to love. Conclusion: To enhance the well-being of middle-aged female non-shift workers, it is essential to reinforce positive factors such as support from coworkers and superiors. Additionally, addressing and mitigating negatively influencing factors such as workplace discrimination and sleep problems is crucial in promoting well-being. By implementing measures to improve these aspects, organizations and policymakers can contribute to a healthier and more supportive work environment for middle-aged, non-shift female workers.

• 정신신체의학
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• 제29권2호
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• pp.111-120
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• 2021

연구목적 이전 연구에 따르면 교대근무는 인간의 자연적인 일주기 리듬에 적응하기 어렵게 만들어 각종 건강문제를 일으킨다. 특히 교대근무자는 근무 일정과 연관된 수면의 어려움을 호소하는 경향이 있으며, 알코올을 수면유도를 위한 자가약으로 사용하는 경우가 있다. 현재까지 교대근무와 수면 및 음주와의 관련성에 관한 명확한 기전이 밝혀지지 않고 있는 상태이다. 따라서 이 연구에서는 교대근무와 수면과의 관련성을 확인하고, 교대근무로 인한 수면의 변화가 음주를 유발하는지에 대해 분석하고자 한다. 방 법 이 연구는 국민건강영양조사 제6기, 제7기 자료 중 2014, 2016, 2018년도를 분석대상으로 하였으며 총 11360명(남성 5704명, 여성 5656명)을 연구대상인원으로 포함시켰다. 6 am-6 pm사이의 근무형태를 주간근무, 이외의 근무형태를 교대근무로 정의하였으며 로지스틱 회귀분석을 통하여 교대근무와 수면의 질, 교대근무와 고위험 음주, 음주량 및 음주 횟수의 관계를 분석하였다. 또한 매개분석을 통하여 수면이 교대근무와 음주의 관계를 매개하는지 여부를 분석하였다. 결 과 교대근무는 남성과 여성에서 수면 질과 유의한 음의 관계를 보였다(남성 OR=1.37, 95% CI=1.11-1.70, 여성 OR=1.26, 95% CI=1.05-1.50). 교대근무와 음주와의 관계에서는 남성의 경우 유의한 관계가 나타나지 않았으나, 여성의 경우 교대근무와 음주횟수에서 유의한 양의 관계를 보였다(OR=1.34, 95% CI=1.04-1.72). 매개분석 시행 시 여성의 수면 질은 교대근무와 음주횟수의 관계를 부분매개하는 것으로 나타났다. 결 론 이 연구의 결과는 교대근무가 수면의 어려움을 유발하며, 여성의 경우에서는 수면의 부분매개효과를 통해 음주를 유발할 수 있음을 시사한다. 여성이 수면장애에 대한 대처방안으로 음주를 선택할 가능성이 높은 점을 고려할 때, 여성 교대근무자에 대한 보다 적극적인 중재방안이 마련된 필요가 있다.

• Journal of Korean Biological Nursing Science
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• 제13권3호
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• pp.229-237
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• 2011

Purpose: The objective of this study was to investigate the relationships between sleep quality, fatigue, depression and health promoting behavior by shift-work patterns in university hospital nurses. Methods: A cross-sectional, descriptive survey was conducted using a convenient sample. The self-administered questionnaires were given to 165 nurses (shift workers 91, non-shift workers 74) employed in two university hospital located in Seoul and Gyeunggi-do. Data were collected from February to March, 2010. Results: The shift workers showed significantly lower sleep quality and health promoting behavior, and higher fatigue than non-shift workers. There were significant correlations between fatigue, depression and health promoting behavior in shift workers. There were significant correlations between sleep quality, fatigue, depression and health promoting behavior in non-shift workers. In multiple linear regression analysis, after controlling for total work experiences, predictor of health promoting behavior in shift workers was only fatigue (${\beta}$=-.29, p<.001). Predictors of health promotion behavior in non-shift workers were depression (${\beta}$=-.37, p=.002) and fatigue (${\beta}$=-.27, p=.023). Conclusion: This study failed to provide a clear explanation why sleep quality does not have a comparable effect on health promotion behaviors of shift-workers as well as non-shift workers. However, future research is needed to determine the various risk factors influencing on health promotion behaviors by which shift-work pattern exacerbates fatigue.

• 한국산업보건학회지
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• 제33권2호
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• pp.206-214
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• 2023

Objectives: To determine the effect of the various type and number of shift work on sociopsychological stress in the university hospital nurses in Seoul, South Korea. Methods: Data was collected through a self-administered questionnaire that included general characteristics, the type and number of shift work in the past 4 weeks and the an sociopsychological stress based on PWI-SF. Logistic regression analysis was conducted to analyze the effect of shift work by types on sociopsychological stress of university hospital nurses using SAS 9.4 and it adjusted general characteristics by the additional models. Results: When the number of night shift work 3 or 4 compared to 0, sociopsychological stress was significantly high(OR=2.16, 95% CI=1.29-3.65). When 5 or more, it was higher(OR=2.39, 95% CI=1.55-3.72). Two continuous night shift work compared to 0 increased sociopsychological stress(OR=2.37, 95% CI=1.49-3.81) and 3 or more even more(OR=2.70, 95% CI=1.72-4.27). If the shift work type changes 14 or 15 times compare to below 11, sociopsychological stress is increased and even higher when 15 or more times but it's not significant after adjusting for covariates. Conclusions: It suggests that workplace with nurse expose to shift work should be on lookout for more than three night shift work, more than two continuous night shift work and more than 14 shift work change which can lead to burnout, absenteeism, depression and decreased productivity.