Fig. 1.
Mean time-spent fractions for RIOPA (by city) and National Human Activity Pattern Survey (NHAPS) participants (Klepeis et al., 2001).
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.