the purpose of this study was to investigate the effect of caffeine ingestion on anaerobic power; fatigue index and blood lactate levels in boys athlete students. among voluntarers 16 subjects were selected and devided into two caffeine and placebo groups in a simple – randomized manner base on fatigue index in the pretest. they were asked to prevent from doing intensified activities 24 hours p...

OBJECTIVE The purposes of this research were to (1) compare the shear-peel bond strength (SPBS) of a band of a fixed space maintainer (SM) cemented with five different adhesive cements; and (2) compare the survival time of bands of SM with each cement type after simulating mechanical fatigue stress. MATERIALS AND METHODS Seventy-five teeth were used to assess retentive strength and another 50...

The aim of this study was to evaluate the reliability of isokinetic and isometric assessments of the knee extensor and the flexor muscle function using the Con-Trex isokinetic dynamometer. Thirty healthy subjects (15 males, 15 females) were tested and retested 7 days later for maximal strength (isokinetic peak torque, work, power and angle of peak torque as well as isometric maximal voluntary c...

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The vigilance of the driver is important for railway safety, despite not being included in the safety management system (SMS) for high-speed train safety. In this paper, a novel fatigue detection system for high-speed train safety based on monitoring train driver vigilance using a wireless wearable electroencephalograph (EEG) is presented. This system is designed to detect whether the driver is...

Background: Multiple sclerosis (MS) is the most prevalent autoimmune chronic disease globally. The current study was conducted to determine the relationship between fatigue severity and circadian rhythm sleep disorders among Iranian MS patients.  Methods: The statistical population of this cross-sectional study included MS patients who were members of the MS Association in Khorramabad City, so...

The full scale aircraft fatigue test(FSAFT)is crucial for determining the fatigue life (or service life based on flight hours) of an aircraft group and for understanding its performance during whole service life. So far, FSAFT is the only means in correctly obtaining the fatigue life of an aircraft group. The early locating and finding repairable cracks and damages in critical structures of the...

A series of biaxial High Cycle Fatigue tests at room temperature is performed to build up an extensive and well-documented database. The testing specimen is a maltese cross thinned in its centre with non homogeneous strain/stress fields. The experimental protocol uses exclusively full-field strain measurements. The strains (cyclic and residual) as well as the crack initiation detection are obta...