Effort sponsored in part by the Defense Advanced Research Projects
Agency (DARPA) and Air Force Research Laboratory Air Force Materiel
Command, USAF, under agreements number F30602-99-2-0525 and DOD
DABT63-99-1-0004. The U.S. Government is authorized to reproduce and
distribute reprints for Governmental purposes notwithstanding any
copyright annotation thereon. This material is also based upon work
supported by the National Science Foundation under Grant No.
IIS-9812755. The views and conclusions contained herein are those of
the authors and should not be interpreted as necessarily representing
the official policies or endorsements, either expressed or implied, of
the Defense Advanced Research Projects Agency (DARPA), Air Force
Research Laboratory or the U.S. Government.
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