{HEAD ~ These parameters} are used to specify a piecewise continuous function of {TAIL ~ time} as an input signal 
{ HEAD ~ These parameters } are used to specify a piecewise continuous function of { TAIL ~ time } as an input signal
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH