The Simulation Engine accepts simulation inputs and calculates {TAIL ~ various outputs} and notifies the system of the status of the simulation at a given time in order to obtain {HEAD ~ appropriate feedback} 
The Simulation Engine accepts simulation inputs and calculates { TAIL ~ various outputs } and notifies the system of the status of the simulation at a given time in order to obtain { HEAD ~ appropriate feedback }
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD