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