Average radiation efficiency with the variation of finger position
: (a) 2 mm at 15 GHz, (b) 1.5 mm at 28 GHz, and (c) 1.5 mm at 60 GHz.
Hughes, Van Gemmert, and Stelmach (2011, in press) used digitized data on finger positions
(sampled at 100 hertz or every l0 milliseconds), rather than video recordings, to derive data on velocity and acceleration during braille reading.
Artist Lessons feature original artists showing how to play their hit songs with everything from finger positions
and techniques to the story behind the song.
The finger movement axis points out of the page and the area maps the space of finger positions
for both players.
 Palm guide: A platform to stabilize wrist and finger positions
for use when registering or scanning a person's palm vein pattern.
It has letters on it which show the correct finger positions
for various notes.
Ingrains correct hand and finger positions
Most of what goes into effectively using chopsticks comes from using the right muscles and finger positions
. It's a case of practice makes perfect.
There is also an animated keyboard which displays the correct finger positions
as the music plays.