ScienceDaily: Science & Society News

How central are online social networks to our lives? Posted: 26 Feb 2015 09:24 AM PST Social networks such as Facebook, LinkedIn and Twitter play an increasingly central role in our lives. Centrality is also an important concept in the theory of social networks. Centrality of an individual, called a "node" in network theory, measures its relative importance within a network. Researchers have now studied the problem of dynamics and evolution of node's centrality.