BACKGROUND Night work has been reported to be associated with various mental disorders and complaints. We investigated relationships between night work and anxiety, depression, insomnia, sleepiness and fatigue among Norwegian nurses. METHODS The study design was cross-sectional, based on validated self-assessment questionnaires. A total of 5400 nurses were invited to participate in a health s...

This paper describes a finite element based method for simulating the effects of material removal, associated with fretting wear, on fretting fatigue parameters in a spline coupling. An incremental wear simulation technique is implemented with a single tooth finite element model of the coupling for symmetric loading, assuming equal wear on all teeth, using a comparatively coarse mesh model, for...

INTRODUCTION Despite the high prevalence of tendon injuries, the etiology of tendon rupture is poorly understood. Degeneration due to cumulative microtrauma resulting from overuse has been widely discussed as a major contributor to tendon failure. However, existing biomechanical models of fatigue have largely focused on the relationship between the applied stress and the number of cycles to fai...

OBJECTIVES To determine, using longitudinal analyses, if retirement is followed by a change in the risk of incident chronic diseases, depressive symptoms, and fatigue. Design Prospective study with repeat measures from 7 years before to 7 years after retirement. SETTING Large French occupational cohort (the GAZEL study), 1989-2007. Participants 11 246 men and 2858 women. MAIN OUTCOME MEASUR...

This study clarified relationships between morningness-eveningness typology and cumulative fatigue or depressive state in Japanese male workers. 959 male chemical factory workers answered a questionnaire that included the MEQ, SDS, CFSI, age, marital status, sleep indexes, life habits, and labor load. Logistic regression analysis was performed with SDS and CFSI as objective variables. We obtain...

Fatigue life of Ti alloys is decreased by tensile stress dwell even at room temperature, which called Cold Dwell (CDF). CDF similar to creep-fatigue some metals (stainless steel, Ni-base alloy, and so on) in the point decrease fatigue with or strain high temperature. In this study, time exhaustion rule ductility based on linear cumulative damage were calculated for assessments. case rule, total...

The surge in keyboard design innovation is widely attributed to concern about the physical effects of keyboarding on users' arms and hands. Those effects range from fatigue and discomfort to more serious medical problems often referred to as cumulative trauma disorders, or CTDs. Examples of this class of chronic disorders include carpal tunnel syndrome, tendonitis, "tennis elbow" and other ailm...

Vicarious trauma can be a problem for those who work and research in areas where clients or participants are survivors of sexual violence. The aim of this study was to explore the trauma experiences of sexual violence researchers from different countries, identifying the issues that traumatized them and the protective strategies they found effective. This article reports on a moderated electron...

Children comprise a significant portion of the agricultural workforce and are exposed to many workplace hazards, including farm machinery, pesticides, poor field sanitation, unsafe transportation, and fatigue from doing physically demanding work for long periods. Migrant farmworker children face the additional hazard of substandard or nonexistent housing in the fields. Children account for a di...