Density estimates on a parabolic spde

We consider a general class of parabolic spde's [formula] with (t, x) [member of] [0, T]×[0, 1] and [epsilon]Wt,x, [epsilon] > 0, a perturbed Gaussian space-time white noise. For (t, x) [member of] (0, T]×(0, 1) we prove the called Davies and Varadhan-Léandre estimates of the density p[epsilon]t,x of the solution u[epsilon]t,x

Combination Strategies for Semantic Role Labeling

This paper introduces and analyzes a battery of inference models for the problem of semantic role labeling: one based on constraint satisfaction, and several strategies that model the inference as a meta-learning problem using discriminative classifiers. These classifiers are developed with a rich set of novel features that encode proposition and sentence-level information. To our knowledge, this is the first work that: (a) performs a thorough analysis of learning-based inference models for semantic role labeling, and (b) compares several inference strategies in this context. We evaluate the proposed inference strategies in the framework of the CoNLL-2005 shared task using only automatically-generated syntactic information. The extensive experimental evaluation and analysis indicates that all the proposed inference strategies are successful -they all outperform the current best results reported in the CoNLL-2005 evaluation exercise- but each of the proposed approaches has its advantages and disadvantages. Several important traits of a state-of-the-art SRL combination strategy emerge from this analysis: (i) individual models should be combined at the granularity of candidate arguments rather than at the granularity of complete solutions; (ii) the best combination strategy uses an inference model based in learning; and (iii) the learning-based inference benefits from max-margin classifiers and global feedback

L'evolució de l'economia regional catalana entre 1960 i 1980

Aquest treball tracta de fer una primera anàlisi de l'evolució d'allò que podríem anomenar economia regional catalana al llarg de vint anys de la seva història recent, de 1960 a 1980, en base fonamentalment a la literatura especialitzada existent

Viure per pintar. J.Martínez Lozano (esbós d'un artista) (Thais Gómez Pol, Eduard Martínez Martínez)

Viure per pintar. J.Martínez Lozano (esbós d'un artista) (Thais Gómez Pol, Eduard Martínez Martínez

Voters' resources and electoral participation in Latin America

Previous studies of electoral participation in Latin America have focused on the political and institutional factors that influence country differences in the aggregate level of turnout. This paper provides a theoretical and empirical examination of the individual-level socio-economic factors that have an impact on citizens’ propensity to vote. We assess the relevance of voters’ resources to explain electoral participation in Latin America. We demonstrate that the demographic characteristics of voters (age and education) are strong predictors of electoral participation in Latin America. Our analysis reveals that the individual objective characteristics of the voters explain much more than individual subjective motivations and mobilization networks

Estudio de las conductas de movimiento y postura de pacientes psiquiátricos mediante la técnica del 'Cluster Analysis'.

El objetivo de este trabajo es, por un lado, mostrar la utilidad de las tdcnicas estadísticas multivariantes, concretamente del analisis por con- glomerados (Cluster Analysis) para el estudio de la conducta no-verbal; y por otro, detectar las similitudes y difeencias comportamentales quepre- sentan varios sujetos con el mismo diagnóstico psiquiatrico. Los sujetos estudiados han sido ocho pacientes con diagnóstico de esquizofrenia (cua- tro hombres y cuatro mujeres), en una situación de entrevista familiar con el terapeuta. La estrategia de investigación es observacional, utilizando para la recogida de 10s datos un sistema de categorias elaborado teniendo en cuenta el aspecto estatico g dinámico de la conducta no-verbal, asicomo las diferentes zonas corporales en las cuales se pueden manifestar. Los re- sultados obtenidos han permitido agrupar a 10s sujetos según las similitu- des que presentaban con respecto a la tasa de movimiento y postura que manifestaban, la velocidad de ejecución de dichas manifestaciones y la va- riabilidad conductual en las sesiones analizadas. Palabras clave: Metodologia observacional, Conducta no-verbal, Ana- lisis de conglomerados