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.
Analysis of active author. Each author represents a node, the size of the node is proportional to the strength of the collaboration link, each line represents a co-authoring relationship, and the line thickness indicates the strength of the collaboration link. The color of a node represents the cluster it belongs to.
