Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
(a) Traveling distance of the imaging tube (tube 1) as a function of the SMA drive voltage during the SMA contraction and expansion phase. (b) A video showing the continuous motion of tube 1 when the SMA is electrically driven with a triangle waveform. Upper portion: full view; lower portion: zoomed view. (QuickTime, 5MB)
