Grad student productivity

I know Jorge Cham has done something like this. But I would like to present my findings here...
The graph above shows productivity of a grad student wrt amount of workload. The slopes of two sides of the curve are affected by student's interests, time of year, his dedication and motivation from peers.

Comments are welcome !!

P.S. Is there a journal/conference where I can submit this ???

P. P.S. Its Friday, 30th May 20:50 hrs here. But for some god forsaken reason, blogspot is showing date as Saturday 31st May.