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.
Random position machine (RPM) was used to simulate the effects of weightlessness. (A) RPM set up. Left panel is the controller to control the rotation speed and direction; right panel shows the inner and outer frames. (B) The flask specially designed for RPM. (C) The internal structure of the flask, which is tightly capped by silicone pad and screws, and three glass slides are placed into the flask at a time.
