Specifically, FIG 8 depicts a plurality of {HEAD ~ spectral regions} denoted as {TAIL ~ regions A E} 
denoted as
Specifically , FIG 8 depicts a plurality of { HEAD ~ spectral regions } denoted as { TAIL ~ regions A E }
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL