Night shift employment involves displacing sleep to the daytime. For female workers, the opportunity for daytime sleep is influenced by routine housework demands, which aggravates sleep deprivation. Allowing naps to be taken during the night shift of work is a frequent practice at some hospitals and can help reduce the effects of sleep deprivation. We hypothesize that an association between dom...

The Employee Timetabling Problem (ETP) is a general class of problems widely encountered in service organizations (such as call centers for instance). Given a set of activities, a set of demand curves (specifying the demand in terms of employees for each activity for each time period) the problem consists of constructing a set of work shifts such that each activity is at all time covered by a s...

INTRODUCTION Irregular work schedules often results in a disruption of the normal circadian rhythm that can causes sleepiness when wakefulness is required and insomnia during the main sleep episode. METHOD Two physicians using the Sleep-EVAL system interviewed 817 staff members of a psychiatric hospital. The interviews were done during the working hours. In addition to a series of questions t...

Baehr, Erin K., Louis F. Fogg, and Charmane I. Eastman. Intermittent bright light and exercise to entrain human circadian rhythms to night work. Am. J. Physiol. 277 (Regulatory Integrative Comp. Physiol. 46): R1598–R1604, 1999.—Bright light can phase shift human circadian rhythms, and recent studies have suggested that exercise can also produce phase shifts in humans. However, few studies have ...

There is evidence that work schedules may influence rates of unhealthy behaviors, suggesting that addressing work schedule challenges may improve health. Health Risk Assessment (HRA) survey responses were collected during 2000-2008 in a multinational chemical and coatings manufacturer. Responses of 26,442 were sufficiently complete for analysis. Rates of smoking, lack of exercise, moderate to h...

The broad implications of catastrophic regime shifts have prompted the need to find methods that are not only able to detect regime shifts but more importantly, identify them before they occur. Rising variance, skewness, kurtosis, and critical slowing down have all been proposed as indicators of impending regime shifts. However, these approaches typically do not signal a shift until it is well ...

Municipality of Tehran with huge number of employees and with the aim to reduce stress and promote the work efficiency, seriously wants to achieve suitable and utilizable studies. Osipow's job stress test is one of the best tools to reach this aim. Data population includes securities building of municipality of Tehran (88 persons from region 18 and 72 persons from region 20), who were randomly ...

Background andObjectives: Nurses comprise a majority of healthcare professionals. Therefore, their quality of life can directly impact the performance of health system at different level. The aim of this study was to explore the potential impact of work shift on physical, mental, and social aspects of nurses’ health.   Methods: A sample of 300 nurses from hospitals of the Rasht city situated ...

OBJECTIVE Light exposure during night work suppresses melatonin production, and night work has been associated with an increased cancer risk. There is little information, however, about the interrelationships of night work, urinary melatonin levels, and levels of plasma steroid hormones in women. METHOD We examined the reproducibility of morning urinary measurements of 6-sulfatoxymelatonin ov...

Title:Rotating night shifts too fast may cause anxiety, decreased attention performance and may impact prolactin levels during the daytime after night shifts-a case control study 1. The manuscript of " Rotating night shifts too fast may cause anxiety, decreased attention performance and may impact prolactin levels during the daytime after night shifts-a case control study " submitted to " BMC p...