The beginning and the end, respectively, of {HEAD ~ a respective period} having a period duration T are thereby placed arbitrarily into {TAIL ~ the respective minimum} of the angle of inclination ψ 
The beginning and the end , respectively , of { HEAD ~ a respective period } having a period duration T are thereby placed arbitrarily into { TAIL ~ the respective minimum } of the angle of inclination ψ
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH