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 visualizations of exemplar networks generated via pure preferential attachment (left), pure inverse preferential attachment (center), and preferential attachment followed by inverse preferential attachment (hybrid model; right). Each network consisted of 100 nodes. The size of each node reflects its degree.
