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DARPA (Army/AMCOM/REDSTONE AR) [W31P4Q-08-1-0009]; BES DOE [DE-FG02-07ER46394]; Air Force Office [FA9550-08-1-0446]; DARPA/ARO [W911NF-08-1-0249]; KAUST Global Research Partnership ; World Premier International Research Center (WPI) ; MEXT (Japan) ; NSF [DMS 0706436, CMMI 0403671]; China Scholarship Council (CSC) [20073020]