A sensitive, systematic search for feeble, macroscopic forces arising from the exchange of hypothetical ultra-low-mass bosons was made by observing the differential acceleration of two different test body pairs toward two different sources. Our differential accelerometer —a highly symmetric, continuously rotating torsion balance —incorporated several innovations that effectively suppressed syst...

Whole body vibration (WBV) is traditionally monitored using accelerometry, but optical motion analysis techniques may provide a means to investigate both vibration exposure and kinmatic joint motions simultaneously. While each method has strengths and weaknesses, the objective of this work is to combine these methods into an efficient and effective methodology to obtain three dimensional motion...

whole body vibration can deteriorate health bringing about or back pain or spinal column injury, resulted from continuing exposure to vibration. also exposure to vibration can cause disorder in central nervous system and adversely influence vascular and skeletal systems. in this research, the vibration of universal 650m tractor seat and its effect on the operator in five levels of engine speeds...

KARATE TOURNAMENTS CONSIST OF TWO EQUALLY IMPORTANT KARATE DISCIPLINES: the kumite and kata competitions. Due to being based both on the distinctive selection of movement techniques and their kinematic and kinetic patterns, we hypothesized that the elite kumite and kata competitors could differ regarding their anthropometric and physical performance profiles. Thirty-one senior male karate compe...

Understanding the kinematics and costs of locomotion is fundamental to unravelling how animals exploit resources resolve life-history trade-offs, as well in assessing potential disturbance. Early insights into terrestrial, aerial aquatic were obtained using cinematographic recording on treadmills (Taylor et al., 1970) wind tunnels (Tucker, or water flumes (Schmidt-Nielsen, 1972). In addition pr...

semi-active base isolation system has been proposed mainly to mitigate the base drift of isolated structures while in most cases, its application causes the maximum acceleration of superstructure to be increased. in this paper, designing optimal semi-active base isolation system composed of linear base isolation system with low damping and magneto-rheological (mr) damper has been studied for co...