Step-Change in Friction Under Electrovibration

Nanoscopic friction under electrochemical control.

We propose a theoretical model of friction under electrochemical conditions focusing on the interaction of a force microscope tip with adsorbed polar molecules whose orientation depends on the applied electric field. We demonstrate that the dependence of friction force on the electric field is determined by the interplay of two channels of energy dissipation: (i) the rotation of dipoles and (ii...

A step change in speed HARDWARE ACCELERATION IN FINANCIAL MARKETS A step change in speed

Managing change in general practice: a step by step guide.

B.J 1992;304:231-4 Over the past five years general practitioners have been challenged by proposals from both the government and the Royal College of General Practitioners to fundamentally change the administrative structure and day to day running of general practice.`'Changes range from individual practice based innovations, such as developing structured surveillance for chronic disorders and ...

Effect of Waveform in Haptic Perception of Electrovibration on Touchscreens

The perceived intensity of electrovibration can be altered by modulating the amplitude, frequency, and waveform of the input voltage signal applied to the conductive layer of a touchscreen. Even though the effect of the first two has been already investigated for sinusoidal signals, we are not aware of any detailed study investigating the effect of the waveform on our haptic perception in the d...

Headedness as friction in synchrony and language change

Contrary to what the title of this presentation may suggest I am not going to propose that headedness should replace the "noise" element (h). On the other hand, I will try to show the advantages of assuming that both headedness (of the resonance elements) and the noise element (h) may bring out phonetic friction but the phonological consequences of employing one, the other, or both mechanisms i...