From geometric quantization to Moyal quantization

We show how the Moyal product of phase-space functions, and the Weyl correspondence between symbols and operator kernels, may be obtained directly using the procedures of geometric quantization, applied to the symplectic groupoid constructed by ``doubling'' the phase space.Comment: 7 two-column pages, RevTeX, UCR--FM--03--9

Nonlinear and Adaptive Control of Flexible Space Structures

Introduction An important class of spacecraft missions involve deployed payload apertures attached to cantilevered flexible appendages. Dynamic response of attitude control and LOS pointing for such systems can involve nonlinear control structure interaction. A benchmark problem for slewing and pointing control of a realistic flexible spacecraft is provided by the NASA/ IEEE SCOLE design challeng