Thus, {HEAD ~ the accumulated count} is proportional to {TAIL ~ themgnitude} of accumulation of the unburned particulates 
is proportional to
Thus , { HEAD ~ the accumulated count } is proportional to { TAIL ~ themgnitude } of accumulation of the unburned particulates
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH