entering a time delay value corresponding to {HEAD ~ the initial time} delay {TAIL ~ τp} into the memory of the computing machine 
entering a time delay value corresponding to { HEAD ~ the initial time } delay { TAIL ~ τp } into the memory of the computing machine
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH