The method 1, wherein {TAIL ~ the first power management event} is a power down event and {HEAD ~ the second power management event} is a power up event 
The method 1 , wherein { TAIL ~ the first power management event } is a power down event and { HEAD ~ the second power management event } is a power up event
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH