The lost of nonentun and stiffness due to ablation nay significantly influence the vibrations of a solid propellant grain. This paper presents an analytical study of the axial shear vibrations of a long hollow cylinder that is subjected to tine dependent body forces in the axial direction. The outer surface of the cylinder is bonded to a rigid case, and the inner radius increases monotonically ...

We report on a novel pumping scheme for stimulated Raman scattering (SRS) that uses a Bessel beam. We have used this scheme for SRS from molecular vibrations in acetone and from a polariton mode in a LiIO(3) crystal. A nearly diffraction-limited Stokes beam was observed along the cone axis of the Bessel beam. The generation mechanism of the Stokes beam is identified as being due to noncollinear...

[1] D. A. Zogas and G. K. Karagiannidis, “Infinite-series representations associated with the bivariate Rician distribution and their applications,” IEEE Trans. Commun., vol. 53, no. 11, pp. 1790–1794, Nov. 2005. [2] A. A. Abu-Dayya and N. C. Beaulieu, “Switched diversity on microcellular Ricean channels,” IEEE Trans. Veh. Technol., vol. 43, no. 6, pp. 970–976, Nov. 1994. [3] K. S. Miller, Mult...

The concept of pseudo-Bessel correlated beams is introduced, and their scintillation properties on propagation through turbulence are investigated. By using the Rytov approximation, the scintillation index of pseudo-Bessel correlated beams is formulated in weak turbulence. The study of scintillation is extended into strong turbulence by numeric simulations. It is shown that by choosing an appro...