Using WordNet for Building WordNets

This paper summarises a set of methodologies and techniques for the fast construction of multilingual WordNets. The English WordNet is used in this approach as a backbone for Catalan and Spanish WordNets and as a lexical knowledge resource for several subtasks.Comment: 8 pages, postscript file. In workshop on Usage of WordNet in NL

Noise effects in extended chaotic system: study on the Lorenz'96 model

We investigate the effects of a time-correlated noise on an extended chaotic system. The chosen model is the Lorenz'96, a kind of toy model used for climate studies. The system is subjected to both temporal and spatiotemporal perturbations. Through the analysis of the system's time evolution and its time correlations, we have obtained numerical evidence for two stochastic resonance-like behaviors. Such behavior is seen when a generalized signal-to-noise ratio function are depicted as a function of the external noise intensity or as function of the system size. The underlying mechanism seems to be associated to a noise-induced chaos reduction. The possible relevance of those findings for an optimal climate prediction are discussed, using an analysis of the noise effects on the evolution of finite perturbations and errors.Comment: To appear in Statistical Mechanics Research Focus, Special volume (Nova Science Pub., NY, in press) (LaTex, 16 pgs, 14 figures

La Tesis de Church-Turing y sus repercusiones epistemológicas

Las pretensiones de este trabajo son modestas; Es el resultado de una exploración conjunta que hemos realizado en tomo del tratamiento que ha recibido la Tesis de Church-Turing por parte de lógicos, matemáticos, filósofos y especialistas en cuestiones cognitivas. Debido a la frondosa literatura existente, nos hemos abocado principalmente a explorar: críticamente aspectos de las repercusiones epistemológicas de la tesis. Hemos intentado comparar los supuestos alcances y límites de diferentes enfoques a los fines de dar un panorama del estado de la discusión sobre el tema. La motivación subyacente ha estado vinculada a la importancia que a nuestro entender tiene esta tesis para ámbitos mucho más extensos de la indagación filosófica. En nuestra opinión, es necesario un esclarecimiento de •los alcances de la misma para tener una adecuada caracterización de los aspectos epistemológicos que impregnan a las teorías de la computabilidad, teoría de algoritmos, y a los alcances de los procedimientos de decisión en ámbitos tanto formales como de aplicación de lenguajes matemáticos especializados en teorizaciones con alto grado de abstracción

Improvement of Virtual Screening Predictions using Computational Intelligence Methods

Virtual Screening (VS) methods can considerably aid clinical research, predicting how ligands interact with drug targets. However, the accuracy of most VS methods is constrained by limitations in the scoring function that describes biomolecular interactions, and even nowadays these uncertainties are not completely understood. In order to improve accuracy of scoring functions used in most VS methods we propose a hybrid novel approach where neural networks (NNET) and support vector machines (SVM) methods are trained with databases of known active (drugs) and inactive compounds, this information being exploited afterwards to improve VS predictions.We thank the Catholic University of Murcia (UCAM) under grant PMAFI/26/12. This work was partially supported by the computing facilities of Extremadura Research Centre for Advanced Technologies (CETA-CIEMAT), funded by the European Regional Development Fund (ERDF). CETA-CIEMAT belongs to CIEMAT and the Government of Spain

Improving drug discovery using hybrid softcomputing methods

Virtual screening (VS) methods can considerably aid clinical research, predicting how ligands interact with drug targets. Most VS methods suppose a unique binding site for the target, but it has been demonstrated that diverse ligands interact with unrelated parts of the target and many VS methods do not take into account this relevant fact. This problem is circumvented by a novel VS methodology named BINDSURF that scans the whole protein surface in order to find new hotspots, where ligands might potentially interact with, and which is implemented in last generation massively parallel GPU hardware, allowing fast processing of large ligand databases. BINDSURF can thus be used in drug discovery, drug design, drug repurposing and therefore helps considerably in clinical research. However, the accuracy of most VS methods and concretely BINDSURF is constrained by limitations in the scoring function that describes biomolecular interactions, and even nowadays these uncertainties are not completely understood. In order to improve accuracy of the scoring functions used in BINDSURF we propose a hybrid novel approach where neural networks (NNET) and support vector machines (SVM) methods are trained with databases of known active (drugs) and inactive compounds, being this information exploited afterwards to improve BINDSURF VS predictions.We thank the Catholic University of Murcia (UCAM) under grant PMAFI/26/12. This work was partially supported by the computing facilities of Extremadura Research Centre for Advanced Technologies (CETA-CIEMAT), funded by the European Regional Development Fund (ERDF). CETA-CIEMAT belongs to CIEMAT and the Government of Spain

Pautas generales para la transformación del estado

En el presente trabajo se plantean estrategias para lograr la transformación del Estado, para lograr mejorar el aspecto comercial de la industria agropecuariaAcademia Nacional de Agronomía y Veterinari

Synthesis of Execution Plans for the QVT Core Language

Model transformation languages (MTLs) are important for Model Driven Engineering as they allow the automation of the engineering design process of hardware and software products, in particular at the preliminary and detailed design phases. However, the theories from compiler optimization have not been reused substantively in the development of MTLs. This makes the challenges associated with the implementation of declarative MTLs harder to overcome, in particular with respect to the synthesis of the execution plan (a representation of the control component of the transformation algorithm). The QVT Core MTL is a declarative language, part of a set of standards proposed by the Object Management Group® in order to support the adoption of Model Driven Engineering (MDE). This research presents how instruction scheduling theories can be used for the synthesis of execution plans, in particular for the QVT Core language. The main contributions are a novel approach for performing data dependence analysis on the QVT Core language and its use for the synthesis of execution plans, and the application of metaheuristics to solve the scheduling problem inherent to the synthesis of execution plans. The research demonstrated the feasibility of applying compiler optimization techniques in the design of MTLs and provides a methodology that can be used to construct effi cient execution plans that result in correct transformations. The performance gains and correctness will help the widespread use of the QVT Core language and encourage the adoption of compiler optimization techniques in the implementation of other MTLs

Towards efficient comparison of change-based models

Comparison of large models can be time-consuming since every element has to be visited, matched, and compared with its respective element in other models. This can result in bottlenecks in collaborative modelling environments, where identifying differences between two versions of a model is desirable. Reducing the comparison process to only the elements that have been modified since a previous known state (e.g., previous version) could significantly reduce the time required for large model comparison. This paper presents how change-based persistence can be used to localise the comparison of models so that only elements affected by recent changes are compared and to substantially reduce comparison and differencing time (up to 90% in some experiments) compared to state-based model comparison

Towards hybrid model persistence

Change-based persistence has the potential to support faster and more accurate model comparison, merging, as well as a range of analytics activities. However, reconstructing the state of a model by replaying its editing history every time the model needs to be queried or modified can get increasingly expensive as the model grows in size. In this work, we integrate change-based and state-based persistence mechanisms in a hybrid model persistence approach that delivers the best of both worlds. In this paper, we present the design of our hybrid model persistence approach and report on its impact on time and memory footprint for model loading, saving, and storage space usage

The presence of striped dolphins, Stenella coeruleoalba (Meyen,1833), in the Argentine sea

El conocimiento del género Stenella en el Atlántico Sudoccidental ha sido muy limitado. A pesar que el holotipo fuera capturado por Meyen (1833) en el estuario del Río de la Plata, sólo unos pocos especímenes se registraron en el sector durante las últimas décadas. El presente estudio analiza la distribución y ocurrencia de delfines listados en el Mar Argentino, y sintetiza el conocimiento sobre su presencia en el Atlántico Sudoccidental. Stenella coeruleoalba se registra entre los 70 y 420 S, aunque la mayoría de los ejemplares se hallaron entre los 300 y 400 S. Cerca del 70% de los ejemplares hallados correspondieron a varamientos solitarios y, en todos los casos en que pudo determinarse el sexo, correspondieron a machos subadultos o adultos (205-242 cm). Un total de 10 cráneos se encuentran depositados actualmente en museos de Brasil, Uruguay y Argentina (LCB 402-471 mm). Los avistajes predominaron entre fines de primavera y verano (octubre-febrero), comprendiendo grupos reducidos (1-4 delfines) en aguas relativamente poco profundas (30 -100 m). Un único ejemplar de esta especie fue capturado incidentalmente en operaciones de pesca de anchoíta en el norte de Patagonia y asociado con delfines comunes. Los patrones de coloración observados fueron el gris azulado en ejemplares varados y pardusco en ejemplares avistados, con la combinación característica de bandas laterales y la mancha dorsal. La corriente cálida del Brasil podría estar influenciando la presencia de delfines listados en Uruguay y Argentina durante el verano, a pesar que algunos de los ejemplares fueron registrados en aguas de temperaturas inferiores a los 200 C, las cuales están influenciadas por la Corriente de Malvinas. Las investigaciones futuras deberían focalizarse en la relación entre las condiciones ambientales y la distribución del género Stenella en el Atlántico Sudoccidental.The knowledge about the presence of striped dolphins (Stenella coeruleoalba) in the South Western Atlantic Ocean (SWAO) is very limited. Although the holotype was captured by Meyen (1833) in the La Plata River Estuary, only a few museum specimens and isolated strandings were recorded in the area. This study presents the distribution and occurrence of striped dolphins in the Argentine Sea and reviews its presence in the SWAO. S.coeruleoalba is found from 70 to 420 S, although most of the sixteen records were found between 300 and 400 S. Seventy percent of the dolphins were single stranded animals, and in the cases that sex was determined, all of them were juvenile to adult males (205-242 cm). A total amount of 10 skulls are deposited in museum collections of Brazil, Uruguay and Argentina (CBL 402-471 mm). The sightings were concentrated in late spring and summer (OctoberFebruary), comprising small groups (1-4 dolphins) in relatively shallow water (30-100 m). Only a single incidental catch was recorded, being a dolphin associated with common dolphins feeding on anchovies in northern Patagonia. The colour pattern found was bluish grey in stranded animals and brownish in live dolphins, with the characteristic combination of lateral stripes and spinal blaze. The southbound warm Brazil Current may influence in the presence of striped dolphins in Uruguay and Argentina during austral summer, even though some animals were found during winter in waters of temperatures below 200 C clearly associated with the northbound cold Malvinas-Falkland Current. Future research should focus on the relationship between the environmental conditions and the distribution of the genus Stenella in the South Western Atlantic.Fil: Bastida, Ricardo Oscar. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Marinas; ArgentinaFil: Rodriguez, Diego Horacio. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Marinas; ArgentinaFil: Desojo, Julia Brenda. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Rivero, Laura. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Marinas; Argentin