Publications

Displaying 1026 - 1050 of 1307

Publication	Date
Computational semantic analysis of language: SemEval-2007 and beyond Authors: Lluís Màrquez,Eneko Agirre,Richard Wicentowski SemEval-2007, the Fourth International Workshop on Semantic Evaluations (Agirre et al. 2007) took place on June 23-24, 2007, as a co-located event with the 45th Annual Meeting of the ACL. It was the fourth semantic evaluation exercise, continuing on from the series of successful Senseval workshops… Springer Science and Business Media LLC	2009-05-14
Analyzing the probability of the optimum in EDAs based on Bayesian networks Authors: Jose A. Lozano,Alexander Mendiburu,Carlos Echegoyen,Roberto Santana In this paper we quantitatively analyze the probability distributions generated by an EDA during the search. In particular, we record the probabilities to the optimal solution, the solution with the highest probability and that of the best individual of the population, when the EDA is solving a… IEEE	2009-05-01
Performance evaluation of H.264/MPEG-4 Scalable Video Coding over IEEE 802.16e networks Authors: Jon Casasempere,Pedro Sanchez,Tomas Villameriel,Javier Del Ser This work considers the transmission of multimedia streams over broadband networks using the latest video coding standard H.264/SVC. The Scalable Video Coding for Heterogeneous Media Delivery allows temporal, spatial and SNR scalability in video flows, adapting and optimizing the quality of the… IEEE	2009-05-01
A new preprocessing procedure for the haplotype inference problem Authors: Jose A. Lozano,Ekhine Irurozki A haplotype is a DNA sequence that is inherited from one parent. They are especially important in the study of complex diseases since they contain more information than genotype data, so the next high priority phase in human genomics involves the development of a full Haplotype Map of human genome… IEEE	2009-05-01
A comparison of generalized hybrid Monte Carlo methods with and without momentum flip Authors: Akhmatskaya, Elena,Bou-Rabee, Nawaf,Reich, Sebastian The generalized hybrid Monte Carlo (GHMC) method combines Metropolis corrected constant energy simulations with a partial random refreshment step in the particle momenta. The standard detailed balance condition requires that momenta are negated upon rejection of a molecular dynamics proposal step.… Elsevier BV	2009-04-01
Weak Dispersive Estimates for Schrödinger Equations with Long Range Potentials Authors: Luis Vega,Alberto Ruiz,Juan Antonio Barceló,M. C. Vilela We prove some local smoothing estimates for the Schr��dinger initial value problem with data in $L^2(\mathbb{R}^d)$, $d \geq 2$ and a general class of potentials. In the repulsive setting we have to assume just a power like decay $(1+\|x\|)^{-��}$ for some $��>0$. Also attractive perturbations are… Informa UK Limited	2009-03-05
A Low-Cost FPGA-Based Embedded Fingerprint Verification and Matching System Authors: Maitane Barrenechea,Jon Altuna,Mikel Mendicute,Javier Del Ser Springer Netherlands	2009-02-17
Cap-and-Trade Systems Versus Carbon Taxes: A Reflection in View of Copenhagen 2009 Authors: Stefano Balbi Cap-and-trade systems are dominating worldwide the policy-makers' choices about the design of climate policies. This is an issue for several of economists, who are arguing that the structure of the costs and damages of climate change gives a strong presumption to price-type approaches. Those who… Elsevier BV	2009-01-01
CLEF 2008: Ad Hoc Track Overview Authors: AGIRRE E,DI NUNZIO, GIORGIO MARIA,FERRO, NICOLA,MANDL T,PETERS C. We describe the objectives and organization of the CLEF 2008 Ad Hoc track and discuss the main characteristics of the tasks offered to test monolingual and cross-language textual document retrieval systems. The track was changed considerably this year with the introduction of tasks with new… Springer Berlin Heidelberg	2009-01-01
Coupled Surge-Heave-Pitch Dynamic Modeling of Spar-Moonpool-Riser Interaction Authors: Vincenzo Nava,Pol D. Spanos,Felice Arena Due to the ongoing rather intense development of deep water gas and oil fields, the technical community has been increasingly focusing its attention to the dynamic behavior of Spar floating structures. Spar dynamics exhibits a highly nonlinear behavior due to the presence of various components such… ASMEDC	2009-01-01
Coupled Surge-Heave-Pitch Dynamic Modeling of Spar-Moonpool-Riser Interaction Authors: Vincenzo Nava,Pol D. Spanos,Felice Arena Due to the rather intense ongoing development of deep water gas and oil fields, the technical community has devoted considerable attention to the dynamic behavior of Spar floating systems. Spar dynamics exhibits a highly nonlinear behavior due to the presence of various components such as mooring… ASME International	2009-01-01
Performance Analysis of a Novel Dual-Frequency Multiple Access Relay Transmission Scheme Authors: Babak Hossein Khalaj,Javier Del Ser In this paper we present the performance analysis of a novel channel assignment scheme where two non-cooperative independent users simultaneously communicate with their destination through a single relay by using only two frequency channels. The analytic derivation of the probability of symbol… Scientific Research Publishing, Inc.	2009-01-01
Simulation of DC dual-laterolog measurements in complex formations: A Fourier-series approach with nonorthogonal coordinates and self-adapting finite elements Authors: Nam, M.J.,Pardo, D.,Torres-Verdin, C. Dual laterolog (DLL) makes use of a galvanic conduction principle to focus electrical currents into rock formations, thereby minimizing shoulder and borehole effects in the measurement of formation resistivity. The tool includes two separate focusing systems: deep-sensing (LLd) and shallow-sensing… Society of Exploration Geophysicists	2009-01-01
Overview of the Clef 2008 Multilingual Question Answering Track Authors: Paulo Rocha,Anselmo Peñas,Eneko Agirre,Nicolas Moreau,Pamela Forner,Bogdan Sacaleanu,Erik Tjong Kim Sang,Corina Forascu,Petya Osenova,Iñaki Alegria,Prokopis Prokopidis,Richard F. E. Sutcliffe The QA campaign at CLEF 2008 [1], was mainly the same as that proposed last year. The results and the analyses reported by last year's participants suggested that the changes introduced in the previous campaign had led to a drop in systems' performance. So for this year's competition it has been… Springer Berlin Heidelberg	2009-01-01
Joint Source-Channel-Network Decoding and Blind Estimation of Correlated Sensors Using Concatenated Zigzag Codes Authors: Pedro M. Crespo,Ignacio Olabarrieta,Javier Del Ser,Mikel Mendicute,Sergio Gil-Lopez Focusing on densely deployed wireless sensor networks, this paper presents a novel method for joint source-channel-network coding of distributed correlated sources through multiple access relay channels. In such networks, the role of intermediate sensors as relay nodes permits to achieve enhanced… Springer Berlin Heidelberg	2009-01-01
Clouds and Aerosols in Saturn's Atmosphere Authors: Agustín Sánchez-Lavega,Kevin H. Baines,Erich Karkoschka,Robert A. West In this chapter we review the photochemical and thermochemical equilibrium theories for the formation of condensate clouds and photochemical haze in Saturn's upper troposphere and stratosphere and show the relevant observations from ground-based and spacecraft instruments. Based on thermochemical… Springer Netherlands	2009-01-01
IXA at CLEF 2008 Robust-WSD Task: Using Word Sense Disambiguation for (Cross Lingual) Information Retrieval Authors: German Rigau,Eneko Agirre,Arantxa Otegi This paper describes experiments for the CLEF 2008 Robust-WSD task, both for the monolingual (English) and the bilingual (Spanish to English) subtasks. We tried several query and document expansion and translation strategies, with and without the use of the word sense disambiguation results… Springer Berlin Heidelberg	2009-01-01
Price Regulation in Greenhouse Gas Emissions Cap-and-Trade Systems: From Theory to Policies Authors: Stefano Balbi Notwithstanding the infinite debate on price versus quantity instruments in the design of a global climate policy, Cap-and-Trade systems are dominating the policymakers' choices worldwide. This is a prime issue for the traditional equilibrium economics, which has argued that the structure of the… Elsevier BV	2009-01-01
A Numerical Study of the Self-Similar Solutions of the Schrödinger Map Authors: Luis Vega,Carlos J. García-Cervera,F. de la Hoz We present a numerical study of the self-similar solutions of the Localized Induction Approximation of a vortex filament. These self-similar solutions, which constitute a one-parameter family, develop a singularity at finite time. We study a number of boundary conditions that allow us reproduce the… Society for Industrial & Applied Mathematics (SIAM)	2009-01-01
Saturn Atmospheric Structure and Dynamics Authors: Agustín Sánchez-Lavega,F. Michael Flasar,Anthony D. Del Genio,Adam P. Showman,Richard K. Achterberg,Kevin H. Baines,Peter L. Read Saturn inhabits a dynamical regime of rapidly rotating, internally heated atmospheres similar to Jupiter. Zonal winds have remained fairly steady since the time of Voyager except in the equatorial zone and slightly stronger winds occur at deeper levels. Eddies supply energy to the jets at a rate… Springer Netherlands	2009-01-01
Towards a Strategy for Moving Trinidad and Tobago to Renewable Technologies Authors: Anthony E. Paul,Stefano Balbi Renewables have been a matter of political discussions in Trinidad and Tobago for more than twenty years. To date, however, no comprehensive policies, or consistent elements leading to their creation, have been adopted. The intent of this paper is to demonstrate that key incentives which might… Elsevier BV	2009-01-01
Magnetic virial identities, weak dispersion and Strichartz inequalities Authors: Luis Vega,Luca Fanelli 23 pages, misprint in the title of the previous version Springer Science and Business Media LLC	2008-12-13
Three-dimensional nonlinear random wave groups in intermediate water depth Authors: Diego Pavone,Diego Pavone,Vincenzo Nava,Vincenzo Nava,Felice Arena,Alessandra Romolo,Alfredo Ascanelli Abstract High waves at ocean occur during a complex space–time evolution of wave groups. In this paper the nonlinear structure of three-dimensional sea wave groups at intermediate water depth is investigated. To this purpose, the Boccotti's Quasi-Determinism theory is firstly applied to describe… Elsevier BV	2008-12-01
Energy-Norm-Based and Goal-Oriented Automatic $hp$ Adaptivity for Electromagnetics: Application to Waveguide Discontinuities Authors: Garcia-Castillo, L.E.,Pardo, D.,Demkowicz, L. The finite-element method (FEM) enables the use of adapted meshes. The simultaneous combination of h (local variations in element size) and p (local variations in the polynomial order of approximation) refinements, i.e., hp-adaptivity, is the most powerful and flexible type of adaptivity. In this… Institute of Electrical and Electronics Engineers (IEEE)	2008-12-01
On the Stability of a Singular Vortex Dynamics Authors: Banica, Valeria,Vega, Luis In this paper we address the question of the singular vortex dynamics exhibited in [15], which generates a corner in finite time. The purpose is to prove that under some appropriate small regular perturbation the corner still remains. Our approach uses the Hasimoto transform and deals with the long… Springer Science and Business Media LLC	2008-11-19