Results 201 to 210 of about 138,150 (266)
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On the reliability and validity of central fatigue determination
European Journal of Applied Physiology, 2021Physical performance fatigue can be ascribed to both peripheral and central components. Central fatigue, however, is an elusive entity, consisting of cognitive/sensory component and presumably also a neuro-physiological component that are difficult to tease apart and assess independently of each other. The most widely accepted method for the assessment
Dotan, Raffy +2 more
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Journal of Vibration and Acoustics, 1989
There are many fatigue test and statistical procedures to establish the life distribution function Q = Q(N) at constant stress (S) level. But the stress distribution function, Q = Q(S), at specified life (N) is more important to the designer, and it remains less developed.
V. A. Avakov, R. G. Shomperlen
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There are many fatigue test and statistical procedures to establish the life distribution function Q = Q(N) at constant stress (S) level. But the stress distribution function, Q = Q(S), at specified life (N) is more important to the designer, and it remains less developed.
V. A. Avakov, R. G. Shomperlen
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Validity and reliability of a scale to assess fatigue
Psychiatry Research, 1991A visual analogue scale to evaluate fatigue severity (VAS-F) was developed and tested in a sample of 75 healthy individuals and a sample of 57 patients undergoing medical evaluation for sleep disorders. The scale consists of 18 items related to fatigue and energy, has simple instructions, and is completed with minimal time and effort.
K A, Lee, G, Hicks, G, Nino-Murcia
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Progress in Structural Engineering and Materials, 1998
AbstractThis review summarizes the state‐of‐the‐art in fatigue reliability. Reliability analysis methods must be tailored to unique characteristics of the fatigue process, eg complicated limit‐state formulations and large‐variance random variables. Methods discussed include the lognormal format, a closed‐form method that has proved to be extremely ...
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AbstractThis review summarizes the state‐of‐the‐art in fatigue reliability. Reliability analysis methods must be tailored to unique characteristics of the fatigue process, eg complicated limit‐state formulations and large‐variance random variables. Methods discussed include the lognormal format, a closed‐form method that has proved to be extremely ...
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Material Fatigue and Reliability of MEMS Accelerometers
2008 IEEE International Symposium on Defect and Fault Tolerance of VLSI Systems, 2008MEMS (microelectromechanical system) reliability has been a very important issue, especially for safety-critical applications. Due to the diversity and multiple energy domains involved, MEMS devices are vulnerable to various failure mechanisms. MEMS reliability under different failure mechanisms should be analyzed separately. Since most of MEMS devices
Xingguo Xiong, Yu-Liang Wu, Wen-Ben Jone
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Fatigue reliability of steel bridges
Journal of Constructional Steel Research, 1999Abstract A fatigue reliability analysis is performed for steel girder bridges. The data base for the live load model is obtained by weigh-in-motion (WIM) measurements. Bridge structures were selected to determine the site-specific truck parameters and component-specific stress spectra. Stress cycles are presented as cumulative distribution functions.
Maria M Szerszen +2 more
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Fatigue And Reliability Of MIM 42CrMo4
World PM2022 Proceedings, 2022MIM 42CrMo4 is a versatile low alloy steel and commonly used in the forging industry. Its properties can be varied with a tailored hardening and tempering treatment over a wide range of strength|ductility combinations. Its high ductility is beneficial for gears, connecting rods, crankshafts, pistons and other automotive and machinery components.
Markus Schneider +4 more
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Fatigue Reliability and Design
Journal of the Structural Division, 1974At present, the fatigue provision in most design specifications in this country is based upon test data presented in the form of modified Goodman diagrams. The recent AISC specification is based upon a constant-range criterion. In any event, neither the randomness of fatigue lives nor that of applied loads is being considered.
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