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.
Network structures and centrality indexes. (A) Network of all students. (B) Network of junior high school students. (C) Network of senior high school students. (D) The strength centrality value among all students, junior high group, and senior high group. (E) The bridge centrality value among junior high group and senior high group.
