Physics – Physics and Society
Scientific paper
2005-10-12
Physics
Physics and Society
Scientific paper
The World-Wide Web (WWW) is characterized by a strong community structure in which groups of webpages (e.g. those devoted to a common topic or belonging to the same organization) are densely interconnected by hyperlinks. We study how such network architecture affects the average Google rank of individual communities. Using a mean-field approximation, we quantify how the average Google rank of community webpages depends on the degree to which it is isolated from the rest of the world in both incoming and outgoing directions, and $\alpha$ -- the only intrinsic parameter of Google's PageRank algorithm. Based on this expression we introduce a concept of a web-community being decoupled or conversely coupled to the rest of the network. We proceed with empirical study of several internal web-communities within two US universities. The predictions of our mean-field treatment were qualitatively verified in those real-life networks. Furthermore, the value $\alpha=0.15$ used by Google seems to be optimized for the degree of isolation of communities as they exist in the actual WWW.
Maslov Sergei
Xie Huafeng
Yan Koon-Kiu
No associations
LandOfFree
Optimal ranking in networks with community structure does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Optimal ranking in networks with community structure, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optimal ranking in networks with community structure will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-686021