Figure 17.
Locomotion direction is 45° direction with x-axis (a) Phase 1; (b) Phase 2; (c) Phase 3; (d) Phase.
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.