{HEAD ~ The method} may further include maintaining {TAIL ~ a similarity matrix} with entries corresponding to the average profile similarity between two channels during a given time period 
{ HEAD ~ The method } may further include maintaining { TAIL ~ a similarity matrix } with entries corresponding to the average profile similarity between two channels during a given time period
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH