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.
Schematic view of particle tracking. A probe particle is embedded within the network that constrains it. Its thermal motion reflects fluctuations of the network, providing a measure of the network elasticity. The average mesh size, ξ, is shown by the arrow.
