For example, {HEAD ~ an implementation} may be performed as a method, or embodied as an apparatus configured to perform a set of operations, or embodied as an apparatus storing instructions for performing a set of operations, or embodied in {TAIL ~ a signal} 
For example , { HEAD ~ an implementation } may be performed as a method , or embodied as an apparatus configured to perform a set of operations , or embodied as an apparatus storing instructions for performing a set of operations , or embodied in { TAIL ~ a signal }
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL