Skew-varicose instability in two-dimensional generalized Swift-Hohenberg equations

We apply analytical and numerical methods to study the linear stability of stripe patterns in two generalizations of the two-dimensional Swift-Hohenberg equation that include coupling to a mean flow. A projection operator is included in our models to allow exact stripe solutions. In the generalized models, stripes become unstable to the skew-varicose, oscillatory skew-varicose, and cross-roll instabilities, in addition to the usual Eckhaus and zigzag instabilities. We analytically derive stability boundaries for the skew-varicose instability in various cases, including several asymptotic limits. We also use numerical techniques to determine eigenvalues and hence stability boundaries of other instabilities. We extend our analysis to both stress-free and no-slip boundary conditions and we note a crossover from the behavior characteristic of no-slip to that of stress-free boundaries as the coupling to the mean flow increases or as the Prandtl number decreases. Close to the critical value of the bifurcation parameter, the skew-varicose instability has the same curvature as the Eckhaus instability provided the coupling to the mean flow is greater than a critical value. The region of stable stripes is completely eliminated by the cross-roll instability for large coupling to the mean flow

Das PC-Einstiegspaket - DAISY (Datenverarbeitungs- und Informationssystem) Benutzerhandbuch

With disquette. Mit DisketteCopy held by FIZ Karlsruhe / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman

Estimating money demand functions for South Asian countries

Money demand function, Cash-in-advance model, Panel cointegration, Panel Granger causality, C22, C23, E41, E52, P52,

A Technique for Small-area Poverty Analyses

This paper proposes a technique for undertaking poverty analyses at city level, by studying the implementation of Costa Rica's social housing policy in the medium-sized city of Liberia. The technique was appraised in relation to its capacity to explore the links between social housing, poverty and inequality, the effects of the implementation of the selected policy and the differences between targeting implementation strategies. The technique helps to clarify the effects that housing policies have on poverty reduction in Liberia. In particular, the use of an urban residential segregation approach in small-area poverty analyses allows the identification of concrete deprived urban areas and the prioritisation of feasible pro-poor land-based actions; therefore, it shows potential as a tool for urban planning and local decision-making