Publications

Displaying 926 - 950 of 1307

Publication	Date
A preliminary study on EDAs for permutation problems based on marginal-based models Authors: Alexander Mendiburu,Jose A. Lozano,Josu Ceberio Estimation of Distribution Algorithms are a class of evolutionary algorithms characterized by the use of probabilistic models. These algorithms have been applied successfully to a wide set of artificial and real-world problems, achieving competitive results in most scenarios. Nevertheless, there… ACM	2011-07-12
Deep winds beneath Saturn’s upper clouds from a seasonal long-lived planetary-scale storm Authors: Sánchez-Lavega, A.,del Río-Gaztelurrutia, T.,Hueso, R.,Gómez-Forrellad, J. M.,Sanz-Requena, J. F.,Legarreta, J.,García-Melendo, E.,Colas, François,Lecacheux, Jean,Fletcher, L. N.,Barrado y Navascués, D.,Parker, D.,International Outer Planet Watch Team,… Convective storms occur regularly in Saturn's atmosphere. Huge storms known as Great White Spots, which are ten times larger than the regular storms, are rarer and occur about once per Saturnian year (29.5 Earth years). Current models propose that the outbreak of a Great White Spot is due to moist… Springer Science and Business Media LLC	2011-07-01
Simulation of wireline sonic logging measurements acquired with Borehole–Eccentered tools using a high-order adaptive finite-element method Authors: Victor M. Calo,Paweł J. Matuszyk,Carlos Torres-Verdín,Angel Mora,David Pardo,Ignacio Muga,Ignacio Muga The paper introduces a high-order, adaptive finite-element method for simulation of sonic measurements acquired with borehole-eccentered logging instruments. The resulting frequency-domain based algorithm combines a Fourier series expansion in one spatial dimension with a two-dimensional high-order… Elsevier BV	2011-07-01
Thermal Structure and Dynamics of Saturn’s Northern Springtime Disturbance Authors: Peter L. Read,A. A. Mamoutkine,Agustín Sánchez-Lavega,Gordon L. Bjoraker,Ricardo Hueso,Roger N. Clark,Teresa del Río-Gaztelurrutia,Philip D. Nicholson,Amy A. Simon-Miller,Jose M. Gomez,Christophe Sotin,Brigette E. Hesman,Kevin H. Baines,T. Momary,F.… Satellite and ground-based observations characterize a massive storm on Saturn and its effects on the atmosphere. American Association for the Advancement of Science (AAAS)	2011-06-17
Increasing Power of Genome-Wide Association Studies by Collecting Additional Single-Nucleotide Polymorphisms Authors: Jose A. Lozano,Eleazar Eskin,Emrah Kostem Abstract Genome-wide association studies (GWASs) have been effectively identifying the genomic regions associated with a disease trait. In a typical GWAS, an informative subset of the single-nucleotide polymorphisms (SNPs), called tag SNPs, is genotyped in case/control individuals.… Oxford University Press (OUP)	2011-06-01
On the limits of effectiveness in estimation of distribution algorithms Authors: Qingfu Zhang,Jose A. Lozano,Roberto Santana,Alexander Mendiburu,Carlos Echegoyen Which problems a search algorithm can effectively solve is a fundamental issue that plays a key role in understanding and developing algorithms. In order to study the ability limit of estimation of distribution algorithms (EDAs), this paper experimentally tests three different EDA implementations… IEEE	2011-06-01
Unique Continuation for Schrödinger Evolutions, with Applications to Profiles of Concentration and Traveling Waves Authors: Luis Escauriaza,Luis Vega,Gustavo Ponce,Carlos E. Kenig We prove unique continuation properties for solutions of the evolution Schr��dinger equation with time dependent potentials. As an application of our method we also obtain results concerning the possible concentration profiles of blow up solutions and the possible profiles of the traveling waves… Springer Science and Business Media LLC	2011-05-17
Development of a decision tree to assess the severity and prognosis of stable COPD Authors: Javier Moraza,Inmaculada Arostegui,Susana Aizpiri,Cristóbal Esteban,Myriam Aburto,Julio Pérez-Izquierdo,Alberto Capelastegui,José M. Quintana The aim of this study was to develop and validate a new method: a classification and regression tree (CART) based on easily accessible measures to predict mortality in patients with stable chronic obstructive pulmonary disease (COPD).This was a prospective study of two independent prospective… European Respiratory Society (ERS)	2011-05-12
On the Application of a Novel Hybrid Harmony Search Algorithm to the Radar Polyphase Code Design Problem Authors: Sancho Salcedo-Sanz,Javier Del Ser,Jose A. Portilla-Figueras,Ángel M. Pérez-Bellido,Sergio Gil-Lopez Polyphase codes are widely used in radar systems as a pulse compression approach due to the fact that they produce lower side-lobes in the compressed signal than other methods. Unfortunately, the efficient design of such codes comprises by itself a non-linear n-dimensional NP-hard optimization… IEEE	2011-05-01
Modeling of bone conduction of sound in the human head using hp-finite elements: Code design and verification Authors: Demkowicz, L.,Gatto, P.,Kurtz, J.,Paszynski, M.,Rachowicz, W.,Bleszyński, E.,Bleszyński, M.,Hamilton, M.,Champlin, C.,Pardo, D. We focus on the development of a reliable numerical model for investigating the bone-conduction of sound in the human head. The main challenge of the problem is the lack of fundamental knowledge regarding the transmission of acoustic energy through non-airborne pathways to the cochlea. A fully… Elsevier BV	2011-05-01
Joint Non-Binary LDPC-BICM and Network Coding with Iterative Decoding for the Multiple Access Relay Channel Authors: Javier Del Ser,Mikel Hernaez,Pedro M. Crespo In this paper we present a novel joint network-channel coding scheme for the time-division Multiple Access Relay Channel (MARC), which combines Bit-Interleaved Coded Modulation with iterative decoding (BICM-ID) based on nonbinary Low-Density Parity Check (LDPC) codes, along with the linear… IEEE	2011-05-01
New post-processing method for interpretation of through casing resistivity (TCR) measurements Authors: Fu-rong Wang,Qing Chen,Hong-bin Li,David Pardo We propose a new iterative method for post processing through casing resistivity (TCR) measurements. This method can be seen as a correction or extension of Kaufman´s theory to more complex scenarios, in which the casing is no longer assumed to be uniform along the axis of the borehole. It can also… Elsevier BV	2011-05-01
Architecture and Approach for Obtaining Spectrum Availability Information Authors: Javier Del Ser,Miia Mustonen,Marja Matinmikko,Tapio Rauma This paper presents a novel architecture and approach for obtaining spectrum availability information in future cognitive radio systems (CRS). CRS can opportunistically access spectrum by identifying unoccupied channels while keeping higher priority systems on the same channel free from… IEEE	2011-05-01
An interactive optimization approach to a real-world oceanographic campaign planning problem Authors: Ibarbia, Izaskun,Mendiburu, Alexander,Santos, Maria,Lozano, Jose A. In this paper we deal with a real-world routing problem that consists of finding the best route for an oceanographic campaign. The planning task involves setting up the initial route and managing the route variations along the way. Bearing in mind the idea of building an experimental tool to… Springer Science and Business Media LLC	2011-04-26
A study on the complexity of TSP instances under the 2-exchange neighbor system Authors: Jose Antonio Pascual,Alexander Mendiburu,Jose A. Lozano,Leticia Hernando This work is related to the search of complexity measures for instances of combinatorial optimization problems. Particularly, we have carried out a study about the complexity of random instances of the Traveling Salesman Problem under the 2-exchange neighbor system. We have proposed two descriptors… IEEE	2011-04-01
A class of discontinuous Petrov–Galerkin methods. Part IV: The optimal test norm and time-harmonic wave propagation in 1D Authors: J. Zitelli,Jay Gopalakrishnan,Leszek Demkowicz,Ignacio Muga,David Pardo,Victor M. Calo The phase error, or the pollution effect in the finite element solution of wave propagation problems, is a well known phenomenon that must be confronted when solving problems in the high-frequency range. This paper presents a new method with no phase errors for one-dimensional (1D) time-harmonic… Elsevier BV	2011-04-01
On the existence of maximizers for a family of restriction theorems Authors: FANELLI L,VEGA L,VISCIGLIA, NICOLA We prove the existence of maximizers for a general family of restrictions operators, up to the end-point. We also provide some counterxamples in the end-point case. Wiley	2011-03-22
Resource allocation in rate-limited OFDMA Systems: A hybrid heuristic approach Authors: Sancho Salcedo-Sanz,Marja Matinmikko,Sergio Gil-Lopez,Javier Del Ser,Miren Nekane Bilbao This paper presents a novel resource allocation procedure for OFDMA downlinks, which stems from an hybridization of the Harmony Search and the Differential Evolution heuristic algorithms. In this setup it is known that optimum subcarrier and power allocation is achieved through 1) assigning each… IEEE	2011-02-01
Dynamics of Jupiter’s equatorial region at cloud top level from Cassini and HST images Authors: Jose Félix Rojas,Ricardo Hueso,Agustín Sánchez-Lavega,N. Barrado-Izagirre,J. M. Gómez-Forrellad,Santiago Pérez-Hoyos,J. F. Sanz-Requena,J. Arregi,Enrique Garcia-Melendo Abstract We present a study of the equatorial region of Jupiter, between latitudes ∼15°S and ∼15°N, based on Cassini ISS images obtained during the Jupiter flyby at the end of 2000, and HST images acquired in May and July 2008. We examine the structure of the zonal wind profile and report the… Elsevier BV	2011-02-01
Extracting S-matrix poles for resonances from numerical scattering data: Type-II Padé reconstruction Authors: Elena Akhmatskaya,Elena Akhmatskaya,S. K. Sen,Dmitri Sokolovski,Dmitri Sokolovski,Dmitri Sokolovski We present a FORTRAN 77 code for evaluation of resonance pole positions and residues of a numerical scattering matrix element in the complex energy (CE) as well as in the complex angular momentum (CAM) planes. Analytical continuation of the S-matrix element is performed by constructing a type-II… Elsevier BV	2011-02-01
Iterative Fusion of Distributed Decisions over the Gaussian Multiple-Access Channel Using Concatenated BCH-LDGM Codes Authors: Javier Del Ser,Pedro M. Crespo,Javier Garcia-Frias,Diana Manjarres,Sergio Gil-Lopez This paper focuses on the data fusion scenario where nodes sense and transmit the data generated by a source to a common destination, which estimates the original information from more accurately than in the case of a single sensor. This work joins the upsurge of research interest in… Springer Science and Business Media LLC	2011-01-27
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
Climate Change and Its Impacts on Tourism in the Alps - The Pilot Area of Auronzo Di Cadore (Belluno) Authors: Carlo Giupponi,Stefano Balbi,Laura Bonzanigo The mountain area of the Veneto Region covers a third of its entire surface. Here the importance of tourism, and especially winter tourism, has grown constantly in time, making it a primary source of alpine wealth and a driver for the regional economy. However, in the last decade, different studies… 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