2,111 research outputs found
Flutter of two parallel flat plates connected by an elastic medium
Flutter boundaries of parallel plates connected by elastic mediu
Ultracold Metastable Calcium Ensembles, a Medium for Matter Wave Amplification ?
We propose an experimental implementation of matter wave amplification by
optical pumping (MAO) with metastable calcium atoms. First experimental results
indicate that pumping rates can be significantly higher than in previous
experimental schemes and let it appear promising that the threshold condition
for generation of degeneracy can be reached.Comment: 6 pages, 2 PS figure
Flutter of buckled, simply supported, rectangular panels at supersonic speeds
Flutter analysis on buckled supported rectangular panels under supersonic surface flo
A preconditioner for the 3D Oseen equations
We describe a preconditioner for the linearised incompressible Navier-Stokes equations (the Oseen equations) which requires as components only a preconditioner/solver for each of a discrete Laplacian and a discrete advection-diffusion operator. With this preconditioner, convergence of an iterative method such as GMRES is independent of the mesh size and depends only mildly on the viscosity parameter (the inverse Reynolds number). Thus when the component preconditioner/solvers are effective on their respective subproblems (as one expects with an appropriate multigrid cycle for instance) a fast Oseen solver results
The Hardy-Littlewood-Sobolev theorem for Riesz potential generated by Gegenbauer operator
WOS: 000405167200002In this paper we introduced and studied the maximal function (G-maximal function) and the Riesz potential (G-Riesz potential) generated by Gegenbauer differential operator G(gimel) = (x(2) - 1)(1/2) (-gimel) d/dx (x(2) - 1)(gimel) (+) (1/2) d/dx. The L-p,L-gimel boundedness of the G-maximal operator is obtained. Hardy-Littlewood-Sobolev theorem of G-Riesz potential on L-p,L-gimel spaces is established. (C) 2016 Ivane Javakhishvili Tbilisi State University. Published by Elsevier B.V.grant of the Presidium of Azerbaijan National Academy of ScienceAzerbaijan National Academy of Sciences (ANAS)The author was supported by the grant of the Presidium of Azerbaijan National Academy of Science 2015. The authors are grateful to the referee for very valuable comments
Eccentrically stiffened shallow shells of double curvature
Buckling and vibration of eccentrically stiffened shallow shells of double curvatur
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