Prueba piloto para la elaboración perfil epidemiológico de discapacidad en el municipio de Madrid

A pesar de los esfuerzos para implementar estrategias que permitan determinar la frecuencia de discapacidad en Colombia, aún persisten problemáticas metodológicas y de recolección de la información. Lo anterior implica una necesidad creciente de implementar sistemas de vigilancia en salud pública en los que la discapacidad sea considerada como una condición de interés. En alianza con el Centro Ambulatorio Gustavo EscallónCayzedo-Madrid Fundación Santa Fe de Bogotá (Cagec) y la Secretaría de Desarrollo Social del municipio de Madrid (Cundinamarca), se diseñó una guía metodológica y una ficha de recolección de información para la población con discapacidad, bajo los lineamientos de la Clasificación Internacional del Funcionamiento, de la Discapacidad y la Salud (CIF)

Spectral theory for the failure of linear control in a nonlinear stochastic system

We consider the failure of localized control in a nonlinear spatially extended system caused by extremely small amounts of noise. It is shown that this failure occurs as a result of a nonlinear instability. Nonlinear instabilities can occur in systems described by linearly stable but strongly nonnormal evolution operators. In spatially extended systems the nonnormality manifests itself in two different but complementary ways: transient amplification and spectral focusing of disturbances. We show that temporal and spatial aspects of the nonnormality and the type of nonlinearity are all crucially important to understanding and describing the mechanism of nonlinear instability. Presented results are expected to apply equally to other physical systems where strong nonnormality is due to the presence of mean flow rather than the action of control.Comment: Submitted to Physical Review

Generation of defects and disorder from deeply quenching a liquid to form a solid

We show how deeply quenching a liquid to temperatures where it is linearly unstable and the crystal is the equilibrium phase often produces crystalline structures with defects and disorder. As the solid phase advances into the liquid phase, the modulations in the density distribution created behind the advancing solidification front do not necessarily have a wavelength that is the same as the equilibrium crystal lattice spacing. This is because in a deep enough quench the front propagation is governed by linear processes, but the crystal lattice spacing is determined by nonlinear terms. The wavelength mismatch can result in significant disorder behind the front that may or may not persist in the latter stage dynamics. We support these observations by presenting results from dynamical density functional theory calculations for simple one- and two-component two-dimensional systems of soft core particles.Comment: 25 pages, 11 figure