In probabilistic design of materials for fracture-critical components in modern military turbine engines, a typical maximum design target risk (DTR) is 5 10 8 component failures/engine flight hour. This metric underscores the essential role of safety in a design process that simultaneously strives to achieve performance, efficiency, reliability, and affordability throughout the life cycle of th...

CONTEXT Deficits in static postural control related to fatigue have been investigated previously, but there is little evidence to link fatigue to performance measures of dynamic postural control. OBJECTIVE To investigate the effects of fatigue and gender on performance measures of the Star Excursion Balance Test (SEBT). DESIGN Mixed-model design. SETTING Research laboratory. PARTICIPANT...

There is little information available regarding how proprioceptive abilities decline as the amount of exertion increases during exercise. The purpose of this study was to determine the role of different levels of fatigue on knee joint position sense. A repeated measures design was used to examine changes in active joint reposition sense (AJRS) prior to and following three levels of fatigue. Eig...

The Eurocodes provide a simplified fatigue design control through the use of Fatigue Load Model 3 (FLM3) and a damage equivalent factor, λ, which is now widely used. In applying the Eurocode method, the first problem arises when designers try to determine the corresponding fatigue span length, especially for bridge static systems not listed. A second problem is that in case of long bridges, the...

In the purely theoretical approach of pavement design, percentage fatigue cracking is related to damage in a probabilistic manner according to the Miner’s law. Two methods that are currently widely in use are based on assumptions of damage distribution. One method assumes fatigue damage being normally distributed, while the other one assumes fatigue damage being lognormally distributed. Since m...

PURPOSE/OBJECTIVES To examine how attentional fatigue changed from the time of simulation to four months after the completion of radiation therapy and to investigate whether specific variables predicted initial levels and trajectories of attentional fatigue. DESIGN Descriptive, longitudinal study. SETTING Two radiation therapy departments. SAMPLE 73 women with breast cancer who received p...

PURPOSE/OBJECTIVES To identify differences in fatigue, other physical symptoms, and psychological symptoms and their relationship to quality of life (QOL) during chemotherapy and as long as one year after. DESIGN Longitudinal, descriptive design embedded in a pilot intervention study. SETTING Midwestern urban oncology clinics and patient homes. SAMPLE 25 Caucasian women, aged 40-65 years ...