Publications

Displaying 601 - 625 of 1351

Publication	Date
A Grouping Harmony Search Algorithm for Assigning Resources to Users in WCDMA Mobile Networks Authors: Aybar-Ruiz, A.,Cuadra, L.,Salcedo-Sanz, S.,Portilla-Figueras, J.A.,Del Ser, J. This paper explores the feasibility of a particular implemen- tation of a Grouping Harmony Search (GHS) algorithm to assign re- sources (codes, aggregate capacity, power) to users in Wide-band Code Division Multiple Access (WCDMA) networks. We use a problem for- mulation that takes into account a… Springer Singapore	2017-01-01
Joint Feature Selection and Parameter Tuning for Short-Term Traffic Flow Forecasting Based on Heuristically Optimized Multi-layer Neural Networks Authors: Oregi, I.,Del Ser, J.,Laña, I.,Vélez, M. Short-term traffic flow forecasting is a vibrant research topic that has been growing in interest since the late 70’s. In the last decade this vibrant field has shifted its focus towards machine learning methods. These techniques often require fine-grained parameter tuning to obtain satisfactory… Springer Singapore	2017-01-01
Cytotoxicity of Au, ZnO and SiO₂ NPs using in vitro assays with mussel hemocytes and gill cells: Relevance of size, shape and additives. Authors: Alberto, Katsumiti,Inmaculada, Arostegui,Miriam, Oron,Douglas, Gilliland,Eugenia, Valsami-Jones,Miren P, Cajaraville Metal-bearing nanoparticles (NPs) possess unique physico-chemical characteristics that make them useful for an increasing number of industrial products and applications, but could also confer them a higher toxicity due to their higher reactivity compared to bulk forms of the same materials. There… Journal: Nanotoxicology	2016-12-13
Adaptive multi-stage integrators for optimal energy conservation in molecular simulations Authors: Jesús María Sanz-Serna,Elena Akhmatskaya,Elena Akhmatskaya,Mario Fernández-Pendás We introduce a new Adaptive Integration Approach (AIA) to be used in a wide range of molecular simulations. Given a simulation problem and a step size, the method automatically chooses the optimal scheme out of an available family of numerical integrators. Although we focus on two-stage splitting… Elsevier BV	2016-12-01
Simple or complicated agent-based models? A complicated issue Authors: Zhanli Sun,Iris Lorscheid,James D. Millington,Steffen Lauf,Nicholas R. Magliocca,Jürgen Groeneveld,Stefano Balbi,Henning Nolzen,Birgit Müller,Jule Schulze,Carsten M. Buchmann Agent-based models (ABMs) are increasingly recognized as valuable tools in modelling human-environmental systems, but challenges and critics remain. One pressing challenge in the era of Big Data and given the flexibility of representation afforded by ABMs, is identifying the appropriate level of… Elsevier BV	2016-12-01
The value of agent-based modelling for assessing tourism–environment interactions in the Anthropocene Authors: Amelung, Bas,Student, Jillian,Nicholls, Sarah,Lamers, Machiel,Baggio, Rodolfo,Boavida-Portugal, Ines,Johnson, Peter,de Jong, Eline,Hofstede, Gert Jan,Pons, Marc,Steiger, Robert,Balbi, Stefano Tourism is one of the prime manifestations of the ‘great acceleration of humankind’ since the Anthropocene started around 1950. The almost 50-fold increase in international tourism arrivals has substantial implications for environmental sustainability, but these have not yet been fully explored.… Elsevier BV	2016-12-01
Semisupervised Multiclass Classification Problems With Scarcity of Labeled Data: A Theoretical Study Authors: Jose A. Lozano,Iñaki Inza,Jonathan Ortigosa-Hernández In recent years, the performance of semisupervised learning (SSL) has been theoretically investigated. However, most of this theoretical development has focused on binary classification problems. In this paper, we take it a step further by extending the work of Castelli and Cover to the multiclass… Institute of Electrical and Electronics Engineers (IEEE)	2016-12-01
VENUS CLOUD MORPHOLOGY AND MOTIONS FROM GROUND-BASED IMAGES AT THE TIME OF THE AKATSUKI ORBIT INSERTION^∗ Authors: Javier Peralta,I. Mendikoa,Jose Félix Rojas,Agustín Sánchez-Lavega,Takeshi Horinouchi,R. Hueso,Shigeto Watanabe,Josep M. Gomez-Forrellad,Santiago Pérez-Hoyos,Yeon Joo Lee ABSTRACT We report Venus image observations around the two maximum elongations of the planet at 2015 June and October. From these images we describe the global atmospheric dynamics and cloud morphology in the planet before the arrival of JAXA’s Akatsuki mission on 2015 December 7.… American Astronomical Society	2016-12-01
A simulation-based quantitative analysis on the topological heritability of Dandelion-encoded meta-heuristics for tree optimization problems Authors: Cristina Perfecto,Miren Nekane Bilbao,Javier Del Ser,Armando Ferro The solutions to many optimization paradigms arising from different application domains can be modeled as a tree graph, in such a way that nodes represent the variables to be optimized and edges evince topological relationships between such variables. In these problems the goal is to infer an… Springer Science and Business Media LLC	2016-11-11
An enduring rapidly moving storm as a guide to Saturn’s Equatorial jet’s complex structure Authors: Sánchez-Lavega, A.,García-Melendo, E.,Perez-Hoyos, S.,Hueso, R.,Wong, M. H.,Simon, A.,Sanz-Requena, J. F.,Antuñano, A.,Barrado-Izagirre, N.,Garate-Lopez, I.,Rojas, J. F.,Gaztelurrutia, T. del Rio,Gómez-Forrellad, J. M.,de Pater, I.,Li, L.,Barry, T.,… AbstractSaturn has an intense and broad eastward equatorial jet with a complex three-dimensional structure mixed with time variability. The equatorial region experiences strong seasonal insolation variations enhanced by ring shadowing, and three of the six known giant planetary-scale storms have… Springer Science and Business Media LLC	2016-11-08
A feature selection method for author identification in interactive communications based on supervised learning and language typicality Authors: Sancho Salcedo-Sanz,Miren Nekane Bilbao,Javier Del Ser,Javier Del Ser,Esther Villar-Rodriguez Authorship attribution, conceived as the identification of the origin of a text be- tween different authors, has been a very active area of research in the scientific community mainly supported by advances in Natural Language Processing (NLP), machine learning and Computational Intelligence. This… Elsevier BV	2016-11-01
The role of local urban traffic and meteorological conditions in air pollution: A data-based case study in Madrid, Spain Authors: Manuel Velez,C. Casanova-Mateo,Javier Del Ser,Javier Del Ser,Ibai Laña,Ales Padró Urban air pollution is a matter of growing concern for both public adminis- trations and citizens. Road traffic is one of the main sources of air pollutants, though topography characteristics and meteorological conditions can make pollution levels increase or diminish dramatically. In this context… Elsevier BV	2016-11-01
Operational Modal Analysis of a Spar-Type Floating Platform Using Frequency Domain Decomposition Method Authors: Carlo Ruzzo,Giuseppe Failla,Maurizio Collu,Vincenzo Nava,Vincenzo Fiamma,Felice Arena System identification of offshore floating platforms is usually performed by testing small-scale models in wave tanks, where controlled conditions, such as still water for free decay tests, regular and irregular wave loading can be represented. However, this approach may result in constraints on… MDPI AG	2016-10-26
Open-sea 1:30 scale tests on a spar-type offshore wind turbine in parked conditions: Progress and future work Authors: Ruzzo C.,Fiamma V.,Failla G.,Arena F.,Collu M.,Nava V. This paper presents the preliminary results of an open-sea experiment on a 1:30 model of a spar floating support structure for offshore wind turbines, in parked conditions. The experiment has been carried out at the Natural Ocean Engineering Laboratory (NOEL) of Reggio Calabria (Italy), thanks to… Informa UK Limited	2016-10-12
A critical discussion about optimisation approaches for ocean energy array design Authors: Nava V.,Topper M. B. R.,Ruiz-Minguela P.,de Andres A.,Jeffrey H. As the technology readiness level of ocean energy devices moves from single units to small arrays, evidence from related industries suggests the need for integrated array design tools. Those tools implement all the functionality required for assessing the economic performance, technical reliability… Informa UK Limited	2016-10-12
On the Application of Bio-inspired Heuristics for Network Routing with Multiple QoS Constraints Authors: Javier Del Ser,Xabier Albizu Landa,Miren Nekane Bilbao,Cristina Perfecto Since the advent of Telecommunication networks in the early 60’s, routing has become a recurrent problem with evergrowing complexity due to the simultaneous share of resources, stringent Quality of Service (QoS) constraints and unmanageable network scales (size, speed and exchanged data volume) by… Springer International Publishing	2016-10-08
A Probabilistic Sample Matchmaking Strategy for Imbalanced Data Streams with Concept Drift Authors: L. Lobo, Jesus,Del Ser, Javier,Bilbao, Miren Nekane,Laña, Ibai,Salcedo-Sanz, Sancho In the last decade the interest in adaptive models for non-stationary environments has gained momentum within the research community due to an increasing number of application scenarios generating non-stationary data streams. In this context the literature has been specially rich in terms of… Springer International Publishing	2016-10-08
The Hera Saturn entry probe mission Authors: J. H. Waite,P. Levacher,S. B. Calcutt,Thibault Cavalié,Agustín Sánchez-Lavega,Christoph U. Keller,Anthony Colaprete,Tristan Guillot,Shahid Aslam,O. Mousis,David H. Atkinson,J. Poncy,Daphne Stam,Athena Coustenis,Francesca Ferri,G. S. Orton,J. J. Fortney,… Accepted for publication in Planetary and Space Science Elsevier BV	2016-10-01
Saturn’s tropospheric particles phase function and spatial distribution from Cassini ISS 2010–11 observations Authors: Santiago Pérez-Hoyos,José Francisco Sanz-Requena,Agustín Sánchez-Lavega,Patrick G.J. Irwin,Andrew Smith Abstract The phase function describes the way particles scatter the incoming radiation. This is a fundamental piece of knowledge in order to understand how a planetary atmosphere scatters sunlight and so it has a profound influence in the retrieved atmospheric properties such as cloud height,… Elsevier BV	2016-10-01
A quadrature-free method for simulation and inversion of 1.5D direct current (DC) borehole measurements Authors: Ignacio Muga,David Pardo,David Pardo,David Pardo,Sergio Rojas Resistivity inverse problems are routinely solved in order to characterize hydrocarbon bearing formations. They often require a large number of forward problems simulations. When considering a one dimensional (1D) planarly layered media, semi-analytical methods can be employed in order to solve a… Springer Science and Business Media LLC	2016-09-30
Cognitive workload classification using eye-tracking and EEG data Authors: Jesus L. Lobo,Simona Collina,Roberta Presta,Javier Del Ser,Flavia De Simone,Zdenek Moravek It has been shown that an increased mental workload in pilots could lead to a decrease in their situation awareness, which could lead, in turn, to a worse piloting performance and ultimately to critical human errors. Assessing the current pilot's psycho-physiological state is a hot topic of… ACM	2016-09-14
Chronic Obstructive Pulmonary Disease Subtypes. Transitions over Time Authors: Esteban, C.,Arostegui, I.,Aburto, M.,Moraza, J.,Quintana, J.M.,García-Loizaga, A.,Basualdo, L.V.,Aramburu, A.,Aizpiri, S.,Uranga, A.,Capelastegui, A. Although subtypes of chronic obstructive pulmonary disease are recognized, it is unknown what happens to these subtypes over time. Our objectives were to assess the stability of cluster-based subtypes in patients with stable disease and explore changes in clusters over 1 year.Multiple… Public Library of Science (PLoS)	2016-09-09
Application of Entropy-Based Features to Predict Defibrillation Outcome in Cardiac Arrest Authors: Beatriz Chicote,Unai Irusta,Raúl Alcaraz,José Rieta,Elisabete Aramendi,Iraia Isasi,Daniel Alonso,Karlos Ibarguren Prediction of defibrillation success is of vital importance to guide therapy and improve the survival of patients suffering out-of-hospital cardiac arrest (OHCA). Currently, the most efficient methods to predict shock success are based on the analysis of the electrocardiogram (ECG) during… MDPI AG	2016-08-24
Introducing gravitational resonances from simple observations of Jupiter’s Galilean satellites Authors: I Ordonez-Etxeberria,A Sánchez-Lavega,T del Rio-Gaztelurrutia We introduce a simple observation methodology to measure the orbital longitudes and mean motions of Jupiter Galilean satellites in order to verify the Laplace resonance phenomenon between Io, Europa and Ganymede (an orbital period commensurability 1:2:4 and an equation that relates their orbital… IOP Publishing	2016-08-17
A novel Coral Reefs Optimization algorithm with substrate layers for optimal battery scheduling optimization in micro-grids Authors: R. Mallol-Poyato,Carlos Camacho-Gómez,Silvia Jiménez-Fernández,Sancho Salcedo-Sanz,J. Del Ser In this paper we propose a Coral Reefs Optimization algorithm with substrate layers (CRO-SL) to tackle the battery scheduling optimization problem in micro-grids (MGs). Specifically, we consider a MG that includes renewable generation and different loads, defined by their power profiles, and is… Springer Science and Business Media LLC	2016-08-08