Background: Workers who use hand-held vibrating tools may experience finger blanching attacks due to episodic vasospasm in the digital vessels. In occupational medicine, the pathological consequences to the exposure to handtransmitted vibration are known as vibration induced white finger (VWF). In many cases, workers are recommended to use anti-vibration gloves and a standard procedure (ISO 108...

Recent studies on autonomous vehicles focus improving driving efficiency and ignore comfort. Because acceleration jerk affect comfort, we propose a comfort regenerative braking system (CRBS) that uses artificial neural networks as vehicle-control strategy for conditions. An vehicle is mainly determined by the control algorithm of vehicle. If passenger’s initially predicted based deceleration li...

We critically assess limits on the maximum energy of protons accelerated within superbubbles around massive stellar clusters, considering a number different scenarios. In particular, we derive under which circumstances acceleration above peta-electronvolt (PeV) energies can be expected. While external forward shock superbubble may account for particles up to 100 TeV, internal primary shocks suc...

introduction air pollution has harmful effect on human health and the environment. accordingly, considerable effort has been put to analyze the air pollutants. one important issue is the spatial distribution of these pollutants. dispersion of the pollutants released from sources on the ground is mostly driven by the planetary boundary layer where turbulent flow causes mixing of the content of t...

In a well forgotten memoir of 1890, Andrei Markov devised a convergence acceleration technique based on a series transformation which is very similar to what is now known as the WilfZeilberger (WZ) method. We review Markov’s work, put it in the context of modern computeraided WZ machinery, and speculate about possible reasons of the memoir being shelved for so long.