“…The value of plus/minus 2 seconds is used to determine if a cell is close to the next as it is a fair interval to account for separate activities while making room for network lags especially in the case of chat protocols that could have constant cells. For example, [10,11,12,13,20,21,22,23,30,31,32,33] become [11.5, 21.5, 31.5]; the cells with timestamps 10, 11, 12 and 13 were clustered as a unique cell with timestamp 11.5 and a unique cell count of 4. Cell aggregation is done to group events together and ease the extraction of features.…”