Publications

Displaying 776 - 800 of 1307

Publication	Date
Novel hybrid heuristics for an extension of the dynamic relay deployment problem over disaster areas Authors: Sancho Salcedo-Sanz,Mikel Sanchez-Ponte,Sergio Gil-Lopez,Javier Del Ser,Miren Nekane Bilbao,Antonio Arana-Castro In this paper, we propose a novel autonomous intelligent tool for the optimum design of a wireless relayed communication network deployed over disaster areas. The so-called dynamic relay deployment problem consists of finding the optimum number of deployed relays and their location aimed at… Springer Science and Business Media LLC	2013-12-12
Colors of Jupiter's large anticyclones and the interaction of a Tropical Red Oval with the Great Red Spot in 2008 Authors: J. M. Gómez-Forrellad,G. S. Orton,Agustín Sánchez-Lavega,Paolo Tanga,M. Cecconi,Nancy J. Chanover,Ricardo Hueso,Jon Legarreta,Santiago Pérez-Hoyos,Enrique Garcia-Melendo,Amy A. Simon-Miller,Leigh N. Fletcher,Patrick G. J. Irwin AbstractThe nature and mechanisms producing the chromophore agents that provide color to the upper clouds and hazes of the atmospheres of the giant planets are largely unknown. In recent times, the changes in red coloration that have occurred in large‐ and medium‐scale Jovian anticyclones have been… American Geophysical Union (AGU)	2013-12-01
Domain decomposition Fourier finite element method for the simulation of 3D marine CSEM measurements Authors: Shaaban A. Bakr,David Pardo,Trond Mannseth We present a novel numerical method based on domain decomposition for the simulation of 3D geophysical marine controlled source electromagnetic (CSEM) measurements. Parts of the computational domain where it is reasonable to represent geoelectric properties in 2D, are discretized combining 2D mixed… Elsevier BV	2013-12-01
Impact flux on Jupiter: From superbolides to large-scale collisions Authors: Hueso, R.,Pérez-Hoyos, S.,Sánchez-Lavega, A.,Wesley, A.,Hall, G.,Go, C.,Tachikawa, M.,Aoki, K.,Ichimaru, M.,Pond, J. W. T.,Korycansky, D. G.,Palotai, C.,Chappell, G.,Rebeli, N.,Harrington, Joseph,Delcroix, M.,Wong, M.,de Pater, I.,Fletcher, L. N.,Hammel… Context. Regular observations of Jupiter by a large number of amateur astronomers have resulted in the serendipitous discovery of short bright flashes in its atmosphere, which have been proposed as being caused by impacts of small objects. Three flashes were detected: one on June 3, 2010, one on… EDP Sciences	2013-12-01
‘Superluminal paradox’ in wave packet propagation and its quantum mechanical resolution Authors: Dmitri Sokolovski,Dmitri Sokolovski,Elena Akhmatskaya We analyse in detail the reshaping mechanism leading to apparently "superluminal" advancement of a wave packet traversing a classically forbidden region. In the coordinate representation, a barrier is shown to act as an effective beamsplitter, recombining envelopes of the freely propagating pulse… Elsevier BV	2013-12-01
Learning Bayesian network classifiers from label proportions Authors: Iñaki Inza,Jerónimo Hernández-González,Jose A. Lozano This paper deals with a classification problem known as learning from label proportions. The provided dataset is composed of unlabeled instances and is divided into disjoint groups. General class information is given within the groups: the proportion of instances of the group that belong to each… Elsevier BV	2013-12-01
An Evaluation of Methods for Estimating the Number of Local Optima in Combinatorial Optimization Problems Authors: Hernando, Leticia,Mendiburu, Alexander,Lozano, Jose A. The solution of many combinatorial optimization problems is carried out by metaheuristics, which generally make use of local search algorithms. These algorithms use some kind of neighborhood structure over the search space. The performance of the algorithms strongly depends on the properties that… MIT Press	2013-11-01
Reliable extraction of the circulation component in the thoracic impedance measured by defibrillation pads Authors: Unai Ayala,Digna M. González-Otero,Elisabete Aramendi,Jo Kramer-Johansen,Erik Alonso,Jesus Ruiz,Trygve Eftestøl To analyze the feasibility of extracting the circulation component from the thoracic impedance acquired by defibrillation pads. The impedance circulation component (ICC) would permit detection of pulse-generating rhythms (PRs) during the analysis intervals of an automated external defibrillator… Elsevier BV	2013-10-01
Multi-agent agro-economic simulation of irrigation water demand with climate services for climate change adaptation Authors: BALBI, Stefano,Sabindra Bhandari,GAIN, ANIMESH,GIUPPONI, Carlo Farmers’ irrigation practices play a crucial role in the sustainability of crop production and water consumption, and in the way they deal with the current and future effects of climate change. In this study, a system dynamic multi-agent model adopting the soil water balance provided by the Food… Elsevier BV	2013-09-09
Stability of the Self-similar Dynamics of a Vortex Filament Authors: Valeria Banica,Luis Vega revised version, 36 pages Springer Science and Business Media LLC	2013-09-06
A survey on applications of the harmony search algorithm Authors: Miren Nekane Bilbao,Diana Manjarres,Sancho Salcedo-Sanz,Zong Woo Geem,Itziar Landa-Torres,J. Del Ser,Sergio Gil-Lopez This paper thoroughly reviews and analyzes the main characteristics and application portfolio of the so-called Harmony Search algorithm, a meta-heuristic approach that has been shown to achieve excellent results in a wide range of optimization problems. As evidenced by a number of studies, this… Elsevier BV	2013-09-01
On the Taxonomy of Optimization Problems Under Estimation of Distribution Algorithms Authors: Roberto Santana,Alexander Mendiburu,Carlos Echegoyen,Jose A. Lozano Understanding the relationship between a search algorithm and the space of problems is a fundamental issue in the optimization field. In this paper, we lay the foundations to elaborate taxonomies of problems under estimation of distribution algorithms (EDAs). By using an infinite population model… MIT Press	2013-09-01
Selectional Preferences for Semantic Role Classification Authors: Beñat Zapirain,Eneko Agirre,Lluís Màrquez,Mihai Surdeanu This paper focuses on a well-known open issue in Semantic Role Classification (SRC) research: the limited influence and sparseness of lexical features. We mitigate this problem using models that integrate automatically learned selectional preferences (SP). We explore a range of models based on… MIT Press - Journals	2013-09-01
On the design of a novel joint network-channel coding scheme for the multiple access relay channel Authors: Mikel Hernaez,J. Del Ser,Pedro M. Crespo This paper proposes a novel joint non-binary network-channel code for the Time-Division Decode-and-Forward Multiple Access Relay Channel (TD-DF-MARC), where the relay linearly combines -- over a non-binary finite field -- the coded sequences from the source nodes. A method based on an EXIT chart… Institute of Electrical and Electronics Engineers (IEEE)	2013-08-01
Fatigue Analysis of Offshore Wind Turbines on Fixed Support Structures Authors: Felice Arena,Natale Alati,Vincenzo Nava,Giuseppe Failla,A. Santini A stochastic time domain fatigue analysis is pursued on steel tripod and jacket support structures for offshore wind turbines, following the basic concepts of recently validated simplified linear analyses. A set of environmental lumped load cases with corresponding probabilities of occurrence is… Trans Tech Publications, Ltd.	2013-07-31
Information seeking in digital cultural heritage with PATHS Authors: Eneko Agirre,Arantxa Otegi,Aitor Soroa,Samuel Fernando,Paula Goodale,Jillian R. Griffiths,Mark M. Hall,Paul Clough,Kate Fernie,Runar Bergheim,Mark Stevenson Current Information Retrieval systems for digital cultural heritage support only the actual search aspect of the information seeking process. This demonstration presents the second PATHS system which provides the exploration, analysis, and sense-making features to support the full information… ACM	2013-07-28
A spatial agent-based model for assessing strategies of adaptation to climate and tourism demand changes in an alpine tourism destination Authors: S. Balbi,C. Giupponi,P. Perez,ALBERTI, Marco A vast body of literature suggests that the European Alpine Region is amongst the most sensitive socio-ecosystems to climate change impacts. Our model represents the winter tourism socio-ecosystem of Auronzo di Cadore, located in the Dolomites (Italy), which economic and environmental conditions… Elsevier BV	2013-07-01
Sensitivity analysis for the appraisal of hydrofractures in horizontal wells with borehole resistivity measurements Authors: Pardo, D.,Torres-Verdín, C. We numerically evaluate the possibility of using borehole electromagnetic measurements to diagnose and quantify hydraulic fractures that have been artificially generated in a horizontal well. Hydrofractures are modeled as thin disks perpendicular to the well and filled with either sand-based or… Society of Exploration Geophysicists	2013-07-01
Frequency-domain finite-element simulations of 2D sonic wireline borehole measurements acquired in fractured and thinly bedded formations Authors: David Pardo,Paweł J. Matuszyk,Carlos Torres-Verdín We simulated wireline borehole sonic waveforms to appraise modal frequency dispersions across fractured and thinly bedded formations. Simulations included monopole and dipole sources of excitation and explicitly took into account the borehole, the mandrel tool, and casing whenever present.… Society of Exploration Geophysicists	2013-07-01
One-way urban traffic reconfiguration using a multi-objective harmony search approach Authors: J. Del Ser,Sergio Gil-Lopez,A. Pastor-Sánchez,Jose A. Portilla-Figueras,Sancho Salcedo-Sanz,Diana Manjarres The use of intelligent optimization systems has been a major topic of research in the last few years for improving the existing urban infrastructure, the traffic optimization and the mobility of citizens. These techniques are of great importance in the analysis and optimization of transportation… Elsevier BV	2013-07-01
Use of generalised additive models to categorise continuous variables in clinical prediction Authors: Barrio Beraza, Irantzu,Arostegui Madariaga, Inmaculada,Quintana López, José María,IRYSS-COPD Group In medical practice many, essentially continuous, clinical parameters tend to be categorised by physicians for ease of decision-making. Indeed, categorisation is a common practice both in medical research and in the development of clinical prediction rules, particularly where the ensuing models are… Springer Science and Business Media LLC	2013-06-26
Atmospheric dynamics of Saturn’s 2010 giant storm Authors: Ricardo Hueso,Agustín Sánchez-Lavega,Enrique Garcia-Melendo,Santiago Pérez-Hoyos,J. F. Sanz-Requena,T. del Río-Gaztelurrutia,Jon Legarreta Great White Spot—a rare planet-encircling storm—raged on Saturn in 2010–2011. Analyses of high-resolution spacecraft imagery and numerical modelling reveal a dynamic storm head powered by sustained convection in the zonal flow of Saturn’s atmosphere. Springer Science and Business Media LLC	2013-06-23
Limb imaging of the Venus O₂ visible nightglow with the Venus Monitoring Camera Authors: Agustín Sánchez-Lavega,Agustín Sánchez-Lavega,A. García Muñoz,A. García Muñoz,Ricardo Hueso,Ricardo Hueso,Andrea Opitz,Wojciech J. Markiewicz,Olivier Witasse,Dmitrij V. Titov AbstractWe investigated the Venus O2 visible nightglow with imagery from the Venus Monitoring Camera on Venus Express. Drawing from data collected between April 2007 and January 2011, we study the global distribution of this emission, discovered in the late 1970s by the Venera 9 and 10 missions.… American Geophysical Union (AGU)	2013-06-13
Effects of the Mooring Line Configuration on the Dynamics of a Point Absorber Authors: Vincenzo Nava,Marin Rajic,Carlos Guedes Soares The aim of this paper is to study the dynamics of a floating body with characteristics comparable to a point absorber wave energy converter with different mooring systems, in geometrical configuration or in the materials. To this purpose, the dynamics of a moored buoy is investigated. The point… American Society of Mechanical Engineers	2013-06-09
On the Response of a Spar Floating Wind Turbine Under the Occurrence of Extreme Events Authors: Hasan Bagbanci,C. Guedes Soares,Vincenzo Nava,Vincenzo Nava,Felice Arena In this paper, the quasi-determinism theory is applied for the computation of forces jointly generated from wind and waves. A coupled 3-degree-of-freedom (3-dofs) model of a floating spar-type 5 MW wind turbine is herein studied subject to wind and waves under the occurrence of wind and sea.… American Society of Mechanical Engineers	2013-06-09