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