A laboratory study was conducted to examine gait changes associated with aging and the effect of these changes on initiation of slips and frequency of falls utilizing newly defined biomechanical parameters of slips and falls. Twenty-eight participants from two age groups (young and old) walked around a circular track at a comfortable pace wearing a safety harness. A slippery floor surface was p...

A new method to determine the shape and fall velocity of hydrometeors by using a single CCD camera is proposed in this paper, and a prototype of a video precipitation sensor (VPS) is developed. The instrument consists of an optical unit (collimated light source with multi-mode fibre cluster), an imaging unit (planar array CCD sensor), an acquisition and control unit, and a data processing unit....

Abstract. Collection efficiency transfer functions that compensate for wind-induced collection loss are presented and evaluated unshielded precipitation gauges. Three novel with wind speed fall velocity dependence developed, including a function from computational fluid dynamics modelling (CFD), an experimental threshold (HE1), linear (HE2). These alongside universal (KUniversal) climate-specif...

We present here a detailed study of the influence of the transverse motion of the atoms in a free-fall gravimeter. By implementing Raman selection in the horizontal directions at the beginning of the atoms’ free fall, we characterize the effective velocity distribution, i.e., the velocity distribution of the detected atom, as a function of the laser cooling and trapping parameters. In particula...

The red blood cell velocity and the arteriole-to-venule transit time of sodium fluorescein were measured in the pial microcirculation of 15 mice immediately before and after phlebotomy and hemodilution. The acute anemic state produced by die phlebotomy and hemodilution was accompanied by an increase in the velocity of the red blood cells and of the fluorescent plasma. Such increments in velocit...