Publications

Displaying 951 - 975 of 1307

Publication	Date
Anisotropic 2D mesh adaptation in hp-adaptive FEM Authors: Anna Paszýnska,Arkadiusz Szymczak,David Pardo,Maciej Paszýnski AbstractThe paper presents a grammar for anisotropic two-dimensional mesh adaptation in hp-adaptive Finite Element Method with rectangular elements. It occurs that a straightforward approach to modeling this process via grammar productions leads to potential deadlock in h-adaptation of the mesh.… Elsevier BV	2011-01-01
Out-of-core multi-frontal solver for multi-physics hp adaptive problems Authors: Maciej Paszyński,Anna Paszyńska,David Pardo,Leszek Demkowicz AbstractIn this paper we present the out-of-core solver algorithm for three dimensional (3D) multi-physics problems solved by the Finite Element Method (FEM). The solver is able to solve problems where 3D meshes contain finite elements of different kind (tetrahedral, prism and pyramid elements)… Elsevier BV	2011-01-01
Goal-Oriented Self-Adaptive hp Finite Element Simulation of 3D DC Borehole Resistivity Simulations Authors: Maciej Paszyński,Victor M. Calo,David Pardo AbstractIn this paper we present a goal-oriented self-adaptive hp Finite Element Method (hp-FEM) with shared data structures and a parallel multi-frontal direct solver. The algorithm automatically generates (without any user interaction) a sequence of meshes delivering exponential convergence of a… Elsevier BV	2011-01-01
KYOTO Authors: Marchetti A.,Ronzano F.,Tesconi M.,Vossen P.,Agirre E.,Bond F.,Bosma W.,Herold A.,Hicks A.,Hsieh S.,Isahara H.,Huang C.,Kanzaki K.,Rigau G.,Segers R. KYOTO is an Asian-European project developing a community platform for modeling knowledge and finding facts across languages and cultures. The platform operates as a Wiki system that multilingual and multi-cultural communities can use to agree on the meaning of terms in specific domains. The Wiki… IGI Global	2011-01-01
A Novel Grouping Heuristic Algorithm for the Switch Location Problem Based on a Hybrid Dual Harmony Search Technique Authors: Itziar Landa-Torres,Sancho Salcedo-Sanz,Javier Del Ser,Sergio Gil-Lopez,Diana Manjarres,Jose A. Portilla-Figueras This manuscript proposes a novel iterative approach for the so-called Switch Location Problem (SLP) based on the hybridization of a group-encoded Harmony Search combinatorial heuristic (GHS) with local search and repair methods. Our contribution over other avantgarde techniques lies on the dual… Springer Berlin Heidelberg	2011-01-01
Introducing the Mallows Model on Estimation of Distribution Algorithms Authors: Jose A. Lozano,Alexander Mendiburu,Josu Ceberio Estimation of Distribution Algorithms are a set of algorithms that belong to the field of Evolutionary Computation. Characterized by the use of probabilistic models to learn the (in)dependencies between the variables of the optimization problem, these algorithms have been applied to a wide set of… Springer Berlin Heidelberg	2011-01-01
The atmospheric influence, size and possible asteroidal nature of the July 2009 Jupiter impactor Authors: Ricardo Hueso,P. Yanamandra-Fisher,H. B. Hammel,Tom Momary,Franck Marchis,Franck Marchis,N. Reshetnikov,Andrew P. Ingersoll,G. S. Orton,Agustín Sánchez-Lavega,S. Lai,Olivier Mousis,Carey M. Lisse,W. Golisch,I. de Pater,G. Villar,Michael H. Wong,Santiago… International audience Elsevier BV	2011-01-01
Meso-GSHMC: A stochastic algorithm for meso-scale constant temperature simulations Authors: Akhmatskaya, E.,Reich, S. We consider the problem of time-stepping/sampling for molecular and meso-scale particle dynamics. The aim of the work is to derive numerical time-stepping methods that generate samples exactly from the desired target temperature distribution. The numerical methods proposed in this paper rely on the… Elsevier BV	2011-01-01
Uncertainty principle of Morgan type and Schrödinger evolutions Authors: Luis Escauriaza,Carlos E. Kenig,Luis Vega,Gustavo Ponce We prove unique continuation properties for solutions of evolution Schr��dinger equation with time dependent potentials. In the case of the free solution these correspond to uncertainly principles referred to as being of Morgan type. As an application of our method we also obtain results concerning… Wiley	2010-12-20
A multi-wavelength study of the 2009 impact on Jupiter: Comparison of high resolution images from Gemini, Keck and HST Authors: Michael H. Wong,Santiago Pérez-Hoyos,Statia Luszcz-Cook,Glenn S. Orton,Mark Boslough,Agustín Sánchez-Lavega,Heidi B. Hammel,Leigh N. Fletcher,Imke de Pater Within several days of A. Wesley's announcement that Jupiter was hit by an object on UT 19 July 2009, we observed the impact site with (1) the Hubble Space Telescope (HST) at UV through visible (225-924nm) wavelengths, (2) the 10-m W.M. Keck II telescope in the near-infrared (1-5μm), and (3) the 8-… Elsevier BV	2010-12-01
The Planetary Laboratory for Image Analysis (PLIA) Authors: Jose Félix Rojas,Agustín Sánchez-Lavega,Javier Peralta,Ricardo Hueso,Santiago Pérez-Hoyos,T. del Río-Gaztelurrutia,Jon Legarreta The observation, characterization, and understanding of planetary atmospheres are key components of Solar System exploration. Their study requires, among other observations, the use of image data acquired from spacecrafts. The basic tasks that are generally used to work with planetary image data… Elsevier BV	2010-11-01
Multi-marker tagging single nucleotide polymorphism selection using estimation of distribution algorithms Authors: Eleazar Eskin,Jose A. Lozano,Alexander Mendiburu,Roberto Santana,Noah Zaitlen This paper presents an optimization algorithm for the automatic selection of a minimal subset of tagging single nucleotide polymorphisms (SNPs).The determination of the set of minimal tagging SNPs is approached as an optimization problem in which each tagged SNP can be covered by a single tagging… Elsevier BV	2010-11-01
A strong high altitude narrow jet detected at Saturn's equator Authors: Jon Legarreta,Santiago Pérez-Hoyos,Agustín Sánchez-Lavega,Enrique Garcia-Melendo,Ricardo Hueso Here we report the discovery at the upper cloud level of an extremely narrow and strong prograde jet, centered in the middle of the broad equatorial jet. Measurements from images obtained by the Cassini Imaging Science Subsystem (ISS) show that the jet reaches 430 ms−1 ± 16 m s−1 with a peak speed… American Geophysical Union (AGU)	2010-11-01
Assessment of Delaware and Groningen effects on dual-laterolog measurements with a self-adaptive hp finite-element method Authors: Carlos Torres-Verdín,Myung Jin Nam,David Pardo We describe numerical simulations of anomalous dual-laterolog (DLL) borehole measurements, including Delaware and Groningen effects. Both effects give rise to abnormally high readings of DLL measurements under extreme logging conditions. Specifically, a low resistive bed below a highly resistive… Society of Exploration Geophysicists	2010-11-01
Methodology and construction of the Basque WordNet Authors: Eneko Agirre,Izaskun Aldezabal,Elisabete Pociello Semantic interpretation of language requires extensive and rich lexical knowledge bases (LKB). The Basque WordNet is a LKB based on WordNet and its multilingual counterparts EuroWordNet and the Multilingual Central Repository. This paper reviews the theoretical and practical aspects of the Basque… Springer Science and Business Media LLC	2010-10-16
Graph-based Word Sense Disambiguation of biomedical documents Authors: Eneko Agirre,Aitor Soroa,Mark Stevenson Abstract Motivation: Word Sense Disambiguation (WSD), automatically identifying the meaning of ambiguous words in context, is an important stage of text processing. This article presents a graph-based approach to WSD in the biomedical domain. The method is unsupervised and does not… Oxford University Press (OUP)	2010-10-07
Agent-Based Modelling of Socio-Ecosystems Authors: BALBI, Stefano,GIUPPONI, Carlo The integrated—environmental, economic and social—analysis of climate change calls for a paradigm shift as it is fundamentally a problem of complex, bottom-up and multi-agent human behaviour. There is a growing awareness that global environmental change dynamics and the related socio-economic… IGI Global	2010-10-01
A long-lived cyclone in Saturn’s atmosphere: Observations and models Authors: T. del Río-Gaztelurrutia,Agustín Sánchez-Lavega,Santiago Pérez-Hoyos,Jon Legarreta,Ricardo Hueso Abstract The atmospheres of the giant planets Jupiter and Saturn possess large numbers of vortices (closed circulation ovals). On the larger scale, above 2000 km, anticyclones on Jupiter and Saturn are generally long-lived coherent structures while cyclones survive a much shorter time and behave… Elsevier BV	2010-10-01
Statistical approaches to analyse patient-reported outcomes as response variables: An application to health-related quality of life Authors: Vicente Núñez-Antón,Inmaculada Arostegui,José M. Quintana Patient-reported outcomes (PRO) are used as primary endpoints in medical research and their statistical analysis is an important methodological issue. Theoretical assumptions of the selected methodology and interpretation of its results are issues to take into account when selecting an appropriate… SAGE Publications	2010-09-21
FIRST EARTH-BASED DETECTION OF A SUPERBOLIDE ON JUPITER Authors: Hueso, R.,Wesley, A.,Go, C.,Pérez-Hoyos, S.,Wong, M. H.,Fletcher, L. N.,Sánchez-Lavega, A.,Boslough, M. B. E.,de Pater, I.,Orton, G. S.,Simon-Miller, A. A.,Djorgovski, S. G.,Edwards, M. L.,Hammel, H. B.,Clarke, J. T.,Noll, K. S.,Yanamandra-Fisher, P. A. Cosmic collisions on planets cause detectable optical flashes that range from terrestrial shooting stars to bright fireballs. On June 3, 2010 a bolide in Jupiter's atmosphere was simultaneously observed from the Earth by two amateur astronomers observing Jupiter in red and blue wavelengths. The… American Astronomical Society	2010-09-09
A novel CAM-based traffic light preemption algorithm for efficient guidance of emergency vehicles Authors: Javier Del Ser,Galder Unibaso,Begona Molinete,Sergio Gil-Lopez on efficiently handling traffic signalling for emergency vehicles via minimally-invasive schemes, in this manuscript we propose a novel traffic light preemption algorithm based on processing part of the Cooperative Awareness Messages (CAM) already defined in the so-called European Intelligent… IEEE	2010-09-01
Centralized synchronization methods for distributed detection in sensor networks Authors: Ignacio Olabarrieta,Javier Del Ser In this paper we consider a network of distributed sensors which simultaneously measure a physical parameter of interest, subject to a certain sensing error probability. The sensed information at each of such nodes is forwarded to a central receiver through parallel independent AWGN channels. In… IEEE	2010-09-01
A novel Harmony Search based spectrum allocation technique for cognitive radio networks Authors: Javier Del Ser,Miia Mustonen,Marja Matinmikko,Sergio Gil-Lopez This paper outlines the application of the heuristic Harmony Search (HS) algorithm for efficient spectrum allocation in cognitive radio networks under a minimum Bit Error Rate (BER) criterion. Our proposed algorithm provides a higher degree of diversity in the search process by virtue of its… IEEE	2010-09-01
Relationship between total hip replacement appropriateness and surgical priority instruments Authors: Mireia Espallargues,Antonio Escobar,Alejandro Allepuz,Montse Moharra,José M. Quintana,Inmaculada Arostegui AbstractRationale Variability in indications for total hip replacement (THR) and unequal waiting times may limit health care access.Objective To analyse the relationship between appropriateness and previously developed surgical priority instruments.Method Multicentre cross‐validation study of… Wiley	2010-08-27
Decision Trees for Indication of Cataract Surgery Based on Changes in Visual Acuity Authors: José M, Quintana,Inmaculada, Arostegui,Txomin, Alberdi,Antonio, Escobar,Emilio, Perea,Gema, Navarro,Belen, Elizalde,Elena, Andradas,Amaia, Bilbao To develop decision trees based on prospectively collected data for determining the appropriateness of cataract extraction.Prospective observational cohort study.Consecutive patients with a diagnosis of cataract who are on waiting lists to undergo cataract extraction by phacoemulsification.Patients… Elsevier BV	2010-08-01