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.
There is only one turning point leading to an irreversible bistable switch. At the threshold A + ≈ 80, the system switches on and remains on even when the stimulus is removed.
