Paraguay: el gobierno de Lugo, el Parlamento y los movimientos sociales

Resumen: Apoyándose en un balance de las elecciones y de los movimientos sociales, el autor sostiene que el nuevo gobierno de Fernando Lugo enfrenta sin fuerzas propias sólidas y suficientemente organizadas la reacción de rechazo de una sociedad donde el establishment corrupto y conservador ha modelado a su antojo, durante más de medio siglo, un aparato estatal prebendario, clientelista y patrimonial. Espera en consecuencia de un doble proceso de revolución cultural y de movilización popular Abstract: Based on the assessment of elections and social movements, the author claims that the new Government by Fernando Lugo, lacking its own forces with enough strength and organizational qualities, faces the rejection reaction of a society where the corrupt and conservative establishment has shaped in its own way, for over half a century, a states prebendary, clientelist and patrimonial machine. He looks forward to a double process of cultural revolution and popular demonstratio

Kink stability, propagation, and length scale competition in the periodically modulated sine-Gordon equation

We have examined the dynamical behavior of the kink solutions of the one-dimensional sine-Gordon equation in the presence of a spatially periodic parametric perturbation. Our study clarifies and extends the currently available knowledge on this and related nonlinear problems in four directions. First, we present the results of a numerical simulation program which are not compatible with the existence of a radiative threshold, predicted by earlier calculations. Second, we carry out a perturbative calculation which helps interpret those previous predictions, enabling us to understand in depth our numerical results. Third, we apply the collective coordinate formalism to this system and demonstrate numerically that it accurately reproduces the observed kink dynamics. Fourth, we report on a novel occurrence of length scale competition in this system and show how it can be understood by means of linear stability analysis. Finally, we conclude by summarizing the general physical framework that arises from our study.Comment: 19 pages, REVTeX 3.0, 24 figures available from A S o

Towards hardware acceleration of neuroevolution for multimedia processing applications on mobile devices

This paper addresses the problem of accelerating large artificial neural networks (ANN), whose topology and weights can evolve via the use of a genetic algorithm. The proposed digital hardware architecture is capable of processing any evolved network topology, whilst at the same time providing a good trade off between throughput, area and power consumption. The latter is vital for a longer battery life on mobile devices. The architecture uses multiple parallel arithmetic units in each processing element (PE). Memory partitioning and data caching are used to minimise the effects of PE pipeline stalling. A first order minimax polynomial approximation scheme, tuned via a genetic algorithm, is used for the activation function generator. Efficient arithmetic circuitry, which leverages modified Booth recoding, column compressors and carry save adders, is adopted throughout the design