We report on the mechanical fatigue behavior of printed, organic, thin-film transistors (OTFTs) based on a polymer semiconductor, investigated by repeatedly applying strain to the flexible OTFT devices and assessing their electrical characteristics after 60,000 bending cycles. As part of our investigation, we established that the rates of reduction in source/drain currents in the OTFT device de...

This study examined the prevalence of common infections among employees in different work schedules. Self-administered questionnaire data from the Maastricht Cohort Study on "Fatigue at Work" (n = 12,140) were used. Job title was used as a matching variable between day and shift workers to control for their different work environment. We used a multilevel analysis of a two-level structure, in w...

Passive collagenous structures such as rabbit medial collateral ligament exhibit fatigue behavior under cyclic loading: the larger the magnitude of repetitive loading, the fewer the number of loading cycles until failure [1]. A knowledge gap exists as to whether the human ACL might also exhibit fatigue behavior under cyclic loading. If so, this would help explain why an ACL rupture can occur du...

Fatigue in Multiple Sclerosis (MS) is one of the most debilitating symptoms in patients with Multiple Sclerosis (pwMS). It interferes significantly with career as well as participation in everyday life activities. It is an enormous burden to the pwMS, his/her family and friends. Direct and indirect costs are extraordinary, both financial and psychosocial. Ongoing scientific studies struggle to ...

Medium-carbon steel is commonly used for the rail, wire ropes, tire cord, cold heading, forging steels, cold finished steel bars, machinable steel and so on. Its fatigue behavior analysis and fatigue life estimation play an important role in the machinery industry. In this paper, the estimation of fatigue life of medium-carbon steel with different surface roughness using established S-N and P-S...

A systematic investigation of the fretting fatigue behavior of the titanium alloy Ti-6Al-4V in both the mill-annealed (MA) and the solution-treated and overaged (STOA) conditions was carried out. A sphere-on-flat fretting fatigue device was used that facilitated real-time control and monitoring of all the relevant parameters such as the contact geometry, contact (normal and tangential) loads, a...

BACKGROUND In multiple sclerosis (MS), treatment discontinuation leads to a higher risk of relapse, poorer quality of life and greater economic impact. OBJECTIVE The objective of this work is to evaluate treatment discontinuation in MS, the reasons for this and the reasons for treatment resumption. METHODS A French national Web-based survey was carried out between May and August 2011. A tot...

The study of fatigue behaviors for nickel-base superalloys is very significant because fatigue damage results in serious consequences. In this paper, two kinds of heat treatment procedures (Pro.I and Pro.II) were taken to investigate the effect of heat treatment on microstructures and fatigue behaviors of a nickel-base superalloy. Fatigue behaviors were studied through total strain controlled m...

Fatigue compromises the reliability of macroscopic metallic components utilized in a variety of technological applications. However, the fatigue behavior of thin metal films and smallscale components used in microelectronics and mechanical microdevices has yet to be explored in detail. The fatigue behavior in (sub)micron thin films is likely to differ from that in bulk material, since the volum...

Modern vehicles are designed to protect occupants in the event of a crash. However, passenger protection can be combined with collision avoidance. Statistics have shown that human error is the number one contributor to road accidents. Advanced driver behavior and monitoring systems have been developed by manufacturers in recent years and many have been proven to be effective systems in the prev...