Global instability

Control of Global Instability In

The effect of base suction on a plane wake was found to produce significant changes on wake dynamics. The wake is produced by merging two boundary layers from the trailing edge of a splitter plate in a two stream water tunnel. A threshold suction speed exists which is equal to half of the free stream velocity. If the suction speed is below the threshold, the wake flow is unstable. If the suctio...

International Institutions for Reducing Global Financial Instability

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Global Instability in Strongly Nonhomogeneous Systems

A Global Forecasting Model of Political Instability

Prior studies of civil conflict using panel studies or econometric models have provided inconsistent results. This paper presents the results of a new study, using case-control methods, to identify risk factors for political instability two years prior to event onset. The models we derive are surprisingly simple, and yet are able to identify states that will or will not experience political ins...

Global axisymmetric Magnetorotational Instability with density gradients

We examine global incompressible axisymmetric perturbations of a differentially rotating MHD plasma with radial density gradients. It is shown that the standard magnetorotational instability, (MRI) criterion drawn from the local dispersion relation is often misleading. If the equilibrium magnetic field is either purely axial or purely toroidal, the problem reduces to finding the global radial e...