The causes of vibration hazards to motorcycle mail deliverers have been considered to be due to the vibrations from the motorcycle, strain on the rider's hands and arms, cold conditions, and duration of the operation and others, and the rider's muscle tone in handling the motorcycle rises as the stability of the motorcycle decreases. In this report, the steering angle and banking of the motorcy...

In the current study, the mechanical and hypothermic damage induced by vibration and cold storage on human mesenchymal stem cells (hMSCs) stored at 2-8°C was quantified by measuring the total cell number and cell viability after exposure to vibration at 50 Hz (peak acceleration 140 m s(-2) and peak displacement 1.4 mm), 25 Hz (peak acceleration 140 m s(-2), peak displacement 5.7 mm), 10 Hz (pea...

In a laboratory experiment, six male subjects were exposed to sinusoidal (0.8, 1.6, 3.15, 6.3 and 12.5 Hz) or random octave band-width white noise (mid-frequencies identical to those of the sinusoidal vibrations) whole-body vibration in xor y-directions, at six levels of magnitude (0.4, 0.8 and 1.6 m/s2 r.m.s. nonand frequency-weighted) with two repetitions. In order to examine time effects, ad...

This review article deals with some effects of neck muscle proprioception on human balance, gait trajectory, subjective straight-ahead (SSA), and self-motion perception. These effects are easily observed during neck muscle vibration, a strong stimulus for the spindle primary afferent fibers. We first remind the early findings on human balance, gait trajectory, SSA, induced by limb, and neck mus...

The morbidity of osteoporosis is increasing fast recently due to people change their daily habits from dynamic events to sedentary activities based on the progress of technology. Osteoporosis makes bones become fragile loose, which cause back pain, loss of height, kyphosis, or even very prone to fracture, fractures and other symptoms. Osteoporosis is already one of the world's largest epidemic,...

In 2002, the Parliament and Commission of the European Community agreed "minimum health and safety requirements" for the exposure of workers to the risks arising from vibration. The Directive defines qualitative requirements and also quantitative requirements in the form of "exposure action values" and "exposure limit values". The quantitative guidance is based on, but appears to conflict with,...

Previous measurements of whole-body vibration associated with earth-moving equipment at surface coal mines have highlighted the significance of the hazard. Considerable variability in measurement amplitudes, even within the same equipment type operated at the same site, has been noted. However, the measurements have previously been undertaken for relatively short durations. Fifty-nine measureme...

Editorial Hand-arm vibration syndrome: a new clinical classification and an updated British standard guide for hand transmitted vibration Raynaud's phenomenon of occupational origin known in the 1950s as "the vibration syndrome" or "vibration induced white finger (VWF)" has, in the 1980s, been renamed "the hand-arm vibration syndrome ." This occupational hazard has, since 1890, afflicted operat...

While it seems that whole body vibration (WBV) might be an effective modality to enhance physical performance, the proper prescription of WBV for performance enhancement remains unknown. The purpose of this study was to compare the immediate effect of various WBV accelerations on counter movement jump (CMJ) height, the duration of any effect, and differences between men and women. Forty-four pa...

a portable and light pneumatic branch shake system was designed and manufactured in this research for harvesting fruits that can be harvested by shaking branch. required air flow and electric current are provided for operating system from category containing electrical generator and air compressor on wheelbarrows and portable chassis. vibration is equipped by programmable logic controller (plc)...