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Deterministic and stochastic perturbations of area preserving flows on a two-dimensional torus
Averaging Markov Process Hamiltonian Flow
2015/9/29
We study deterministic and stochastic perturbations of incompressible flows on
a two-dimensional torus. Even in the case of purely deterministic perturbations,
the long-time behavior of such &...
Averaging of incompressible ows on two-dimensional surfaces
two-dimensional surfaces incompressible
2015/9/29
We consider a process on a compact two-dimensional surface which consists
of the fast motion along the stream lines of an incompressible periodic vector eld
perturbed by white noise. It gives rise ...
Proper affine actions and geodesic flows of hyperbolic surfaces
hyperbolic surfaces geodesic fl ows
2015/9/29
Let €0 O.2; 1/ be a Schottky group, and let † D H
2=€0 be the corresponding
hyperbolic surface. Let C.†/ denote the space of unit length geodesic currents
on †. The cohom...
Deterministic and stochastic perturbations of area preserving flows on a two-dimensional torus
Averaging Markov Process Hamiltonian Flow Gluing Conditions Diffusion on a Graph
2015/9/28
We study deterministic and stochastic perturbations of incompressible flows on a two-dimensional torus. Even in the case of purely deterministic perturbations, the long-time behavior of such ...
Averaging of incompressible flows on two-dimensional surfaces
Averaging Markov Process Incompressible Flow Gluing Conditions Diffusion on a Graph
2015/9/25
We consider a process on a compact two-dimensional surface which consists of the fast motion along the stream lines of an incompressible periodic vector field perturbed by white noise. It gives rise t...
Computation of flows with shocks using the Spectral Difference method with artificial viscosity, I: Basic formulation and application
Spectral Difference Artifi cial viscosity Compressible fl ows
2015/7/3
The present work combines the Spectral Difference method with an artificial viscosity based approach to enable high-order computation of compressible fluid flows with discontinuities...
Analysis and shape optimization in incompressible flows with unstructured grids
Adjoints Unstructured grids Incompressible fl ows
2015/7/3
The reduced gradient evaluations provide major computa tional savings for unstructured grids and its accuracy and use for canonical and industrial problems is a major contribution of this study. The d...
A Spectral Difference method for viscous compressible flows with shocks
Spectral Diff erence method viscous compressible fl ows shocks
2015/7/3
The current work focuses on applying an artificial viscosity approach to the Spectral Difference (SD) method to enable high-order computation of compressible fluid flows with discont...
On nonlinear preconditioners in Newton–Krylov methods for unsteady flows
unsteady fl ows preconditioning Newton–Krylov methods matrix-free methods
2015/7/2
The application of nonlinear schemes like dual time stepping as preconditioners in matrix-free Newton Krylov-solvers is considered and analyzed, with a special emphasis on unsteady viscous flows...
New developments in the analysis of column-collapse pyroclastic density currents through numerical simulations of multiphase flows
column-collapse pyroclastic density multiphase fl ows
2015/1/4
A granular multiphase model has been used to
evaluate the action of differently sized particles on the dynamics of fountains and associated pyroclastic density currents.
Capital flows and the risk-taking channel of monetary policy
Bank leverage monetary policy capital fl ows risk-taking channel
2014/3/18
We study the dynamics linking monetary policy with bank leverage and show that adjustments in leverage act as the linchpin in the monetary transmission mechanism that works through fluctuations ...
Capital flows and the risk-taking channel of monetary policy
Bank leverage monetary policy capital fl ows risk-taking channel
2014/3/18
We study the dynamics linking monetary policy with bank leverage and show that adjustments
in leverage act as the linchpin in the monetary transmission mechanism that works through fluctuations...
DECISION SUPPORT SYSTEMS USING 3D OGC SERVICES AND INDOOR ROUTING – EXAMPLE SCENARIO FROM THE OWS-6 TESTBED
OWS-6 Decision Support Systems Indoor Routing Emergency Response 3D Visualization
2014/6/11
The OGC OWS testbeds are conducted annually with partners from the industry, research institutes and universities. A Decision Support Scenario (DSS) has been designed for investigating the combination...
Net Inflows and Time-Varying Alphas: The Case of Hedge Funds
Hedge funds performance asset pricing models unobserved components models
2014/6/25
The growth in the size of the hedge funds industry has led some investors to worry about a decline in alphas, associated with reduced arbitrage opportunities in international financial markets. ...
Asymmetric mixing transport: A horizontal transport mechanism for sinking plankton and sediment in tidal flows
sinking plankton sediment tidal fl ows
2014/5/30
A mechanism is described for the net horizontal transport of sinking plankton or sediment by oscillatory tidal
flows. The mean motion of the plankton or particles is driven by the modulation of...