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