Publications

Displaying 401 - 425 of 1227

Publication	Date
Big Data for transportation and mobility: recent advances, trends and challenges Authors: Miren Nekane Bilbao,Javier Del Ser,Javier Del Ser,Sergio Campos-Cordobés,Ana I. Torre-Bastida,Maitena Ilardia,Ibai Laña Big Data is an emerging paradigm and has currently become a strong attractor of global interest, specially within the transportation industry. The combination of disruptive technologies and new concepts such as the Smart City upgrades the transport data life cycle. In this context, Big Data is… Institution of Engineering and Technology (IET)	2018-07-17
A strategy for self-adjointness of Dirac operators: Applications to the MIT bag model and $\delta$-shell interactions Authors: Thomas Ourmières-Bonafos,Luis Vega We develop an approach to prove self-adjointness of Dirac operators with boundary or transmission conditions at a $\mathcal{C}^2$-compact surface without boundary. To do so we are lead to study the layer potential induced by the Dirac system as well as to define traces in a weak sense for functions… Universitat Autonoma de Barcelona	2018-07-01
DRED: An evolutionary diversity generation method for concept drift adaptation in online learning environments Authors: Javier Del Ser,Javier Del Ser,Jesus L. Lobo,Miren Nekane Bilbao,Sancho Salcedo-Sanz,Cristina Perfecto Abstract Nowadays fast-arriving information flows lay the basis of many data mining applications. Such data streams are usually affected by non-stationary events that eventually change their distribution (concept drift), causing that predictive models trained over these data become obsolete and… Elsevier BV	2018-07-01
Erratum: “Self-adjoint extensions of Dirac operators with Coulomb type singularity” [J. Math. Phys. 54, 041504 (2013)] Authors: Javier Duoandikoetxea,Luis Vega,Naiara Arrizabalaga AIP Publishing	2018-07-01
Hill-Climbing Algorithm: Let's Go for a Walk Before Finding the Optimum Authors: Alexander Mendiburu,Jose A. Lozano,Leticia Hernando Local search algorithms are one of the most developed metaheuristics to solve combinatorial optimisation problems. Particularly, hill-climbing algorithms are simple but effective techniques that have been extensively used to deal with this kind of problems. These algorithms draw paths through the… IEEE	2018-07-01
Are the Artificially Generated Instances Uniform in Terms of Difficulty? Authors: Pérez, A.,Ceberio, J.,Lozano, J.A. Research Groups 2013-2018 (IT-609-13) TIN2016-78365-R(Spanish Ministry of Economy, Industry and Competitiveness) IEEE	2018-07-01
A Numerical 1.5D Method for the Rapid Simulation of Geophysical Resistivity Measurements Authors: Mostafa Shahriari,Sergio Rojas,David Pardo,Angel Rodríguez-Rozas,Shaaban A. Bakr,Victor M. Calo,Ignacio Muga In some geological formations, borehole resistivity measurements can be simulated using a sequence of 1D models. By considering a 1D layered media, we can reduce the dimensionality of the problem from 3D to 1.5D via a Hankel transform. The resulting formulation is often solved via a semi-analytic… MDPI AG	2018-06-20
Mooring System Design Approach: A Case Study for MARMOK-A Floating OWC Wave Energy Converter Authors: Victor Petuya,Imanol Touzon,Vincenzo Nava,Borja de Miguel,Iñigo Mendikoa,Francesco Boscolo This paper presents a methodology and a flowchart of steps to take for a, consistent and rapidly convergent design of catenary mooring systems. It is subsequently applied for a floating Oscillating Water Column WEC MARMOK-A developed by Oceantec Energías Marinas, in order to fulfill the technical… American Society of Mechanical Engineers	2018-06-17
On the Relationship Between the One-Corner Problem and the M-Corner Problem for the Vortex Filament Equation Authors: Francisco de la Hoz,Luis Vega,Luis Vega 33 pages, 13 figures Springer Science and Business Media LLC	2018-06-13
Optimal design of Microgrid’s network topology and location of the distributed renewable energy resources using the Harmony Search algorithm Authors: R. Mallol-Poyato,Carlos Camacho-Gómez,Sancho Salcedo-Sanz,Javier Del Ser,Javier Del Ser,Silvia Jiménez-Fernández In this paper, we tackle the joint optimization of the network topology and the optimal location of distributed renewable energy resources in a Microgrid (MG). The MG network topology optimization problem is focused on obtaining network deployments with minimal cost, whereas the location of… Springer Science and Business Media LLC	2018-06-13
Two datasets of defect reports labeled by a crowd of annotators of unknown reliability Authors: Jerónimo Hernández-González,Jose A. Lozano,Jose A. Lozano,Rachel Harrison,Daniel Rodriguez,Iñaki Inza Classifying software defects according to any defined taxonomy is not straightforward. In order to be used for automatizing the classification of software defects, two sets of defect reports were collected from public issue tracking systems from two different real domains. Due to the lack of a… Elsevier BV	2018-06-01
Refined Isogeometric Analysis for a preconditioned conjugate gradient solver Authors: Lisandro Dalcin,Lisandro Dalcin,Victor M. Calo,Victor M. Calo,Victor M. Calo,Daniel Garcia,David Pardo,David Pardo,David Pardo Starting from a highly continuous Isogeometric Analysis (IGA) discretization, refined Isogeometric Analysis (rIGA) introduces $C^0$ hyperplanes that act as separators for the direct LU factorization solver. As a result, the total computational cost required to solve the corresponding system of… Elsevier BV	2018-06-01
Scientific rationale for Uranus and Neptune in situ explorations Authors: Ricardo Hueso,Fabien Borget,B. Brugger,Louis Le Sergeant d'Hendecourt,Jean-Baptiste Renard,David H. Atkinson,Athena Coustenis,Sébastien Charnoz,Julianne I. Moses,Thomas Ronnet,Michel Dobrijevic,Agustín Sánchez-Lavega,T. Encrenaz,O. Mousis,E.… The ice giants Uranus and Neptune are the least understood class of planets in our solar system but the most frequently observed type of exoplanets. Presumed to have a small rocky core, a deep interior comprising ~70% heavy elements surrounded by a more dilute outer envelope of H2 and He, Uranus… Elsevier BV	2018-06-01
Bilingual embeddings with random walks over multilingual wordnets Authors: Aitor Soroa,Josu Goikoetxea,Eneko Agirre Preprint version, Knowledge-Based Systems (ISSN: 0950-7051). (2018) Elsevier BV	2018-06-01
Effects of Reducing VMs Management Times on Elastic Applications Authors: Pascual, J.A.,Lozano, J.A.,Miguel-Alonso, J. Cloud infrastructures provide computing resources to applications in the form of Virtual Machines (VMs). Many applications deployed in cloud resources have an elastic behavior, that is, they change the number of servers (VMs) dynamically, adapting the application to the workload. Scaling-out and… Springer Science and Business Media LLC	2018-05-26
Fast 2.5D finite element simulations of borehole resistivity measurements Authors: Carlos Torres-Verdín,Ángel Rodríguez-Rozas,David Pardo,David Pardo,David Pardo We develop a rapid 2.5-dimensional (2.5D) finite element method for simulation of borehole resistivity measurements in transversely isotropic (TI) media. The method combines arbitrary high-order $H^1$ - and $H$ (curl)-conforming spatial discretizations. It solves problems where material properties… Springer Science and Business Media LLC	2018-05-24
QUANTUM COMPUTING: SIX KEY FACTORS TO UNDERSTAND THE FUTURE OF COMPUTATION Authors: VILLAR RODRIGUEZ, ESTHER,OSABA ICEDO, ENEKO,DEL SER LLORENTE, JAVIER The future of computing has been seen since its inception with the focus on the two objectives: more data and less energy. Continued advances in computer technology have allowed, since the 1960s, a steady and dizzying reduction in the size of transistors, which has translated into a faster process… UK Zhende Publishing Limited Company	2018-05-01
Haze and cloud structure of Saturn's North Pole and Hexagon Wave from Cassini/ISS imaging Authors: J.F. Sanz-Requena,S. Pérez-Hoyos,A. Sánchez-Lavega,A. Antuñano,Patrick G.J. Irwin In this paper we present a study of the vertical haze and cloud structure in the upper two bars of Saturn's Northern Polar atmosphere using the Imaging Science Subsystem (ISS) instrument onboard the Cassini spacecraft. We focus on the characterization of latitudes from 53° to 90° N. The… Elsevier BV	2018-05-01
On the imputation of missing data for road traffic forecasting: New insights and novel techniques Authors: Ignacio Olabarrieta,Javier Del Ser,Javier Del Ser,Manuel Velez,Ibai Laña Vehicle flow forecasting is of crucial importance for the management of road traffic in complex urban networks, as well as a useful input for route planning algorithms. In general traffic predictive models rely on data gathered by different types of sensors placed on roads, which occasionally… Elsevier BV	2018-05-01
Finite element simulations of logging-while-drilling and extra-deep azimuthal resistivity measurements using non-fitting grids Authors: Théophile Chaumont-Frelet,David Pardo,David Pardo,David Pardo,Ángel Rodríguez-Rozas International audience; We propose a discretization technique using non-fitting grids to simulate magnetic field based resistivity logging measurements. Non-fitting grids are convenient because they are simpler to generate and handle than fitting grids when the geometry is complex. On the other… Springer Science and Business Media LLC	2018-04-27
Revealing the Mechanism of Sodium Diffusion in Na_xFePO₄ Using an Improved Force Field Authors: Ariel Lozano,Bruno Escribano,Mauricio R. Bonilla,Javier Carrasco,Elena Akhmatskaya,Elena Akhmatskaya Olivine NaFePO4 is a promising cathode material for Na-ion batteries. Intermediate phases such as Na0.66FePO4 govern phase stability during intercalation-deintercalation processes, yet little is known about Na+ diffusion in NaxFePO4 (0 < x < 1). Here we use an advanced simulation technique,… American Chemical Society (ACS)	2018-04-02
Evaluation of chest compression artefact removal based on rhythm assessments made by clinicians Authors: Alonso, Erik,Aramendi Ecenarro, Elisabete,Irusta Zarandona, Unai,Daya, Mohamed R.,Corcuera Bergado, Carlos,Lu, Yuanzheng,Idris, Ahamed H. To evaluate the performance of a state-of-the-art cardiopulmonary resuscitation (CPR) artefact suppression method by assessing to what extent the filtered electrocardiogram (ECG) can be correctly diagnosed by emergency medicine doctors.A total of 819 ECG segments were used. Each segment contained… Elsevier BV	2018-04-01
Cytotoxicity and cellular mechanisms of toxicity of CuO NPs in mussel cells in vitro and comparative sensitivity with human cells Authors: Teresa D. Tetley,Paul Reip,Alberto Katsumiti,Inmaculada Arostegui,Miren P. Cajaraville,Andrew J. Thorley,Eugenia Valsami-Jones There is a need to assess human and ecosystem health effects of copper oxide nanoparticles (CuO NPs), extensively used in many industrial products. Here, we aimed to determine the cytotoxicity and cellular mechanisms involved in the toxicity of CuO NPs in mussel cells (hemocytes and gill cells) in… Elsevier BV	2018-04-01
The weighted independent domination problem: Integer linear programming models and metaheuristic approaches Authors: Christian Blum,Pedro Pinacho Davidson,Pedro Pinacho Davidson,Jose A. Lozano,Jose A. Lozano This work deals with the so-called weighted independent domination problem, which is an NP-hard combinatorial optimization problem in graphs. In contrast to previous work, this paper considers the problem from a non-theoretical perspective. The first contribution consists in the development of… Elsevier BV	2018-03-01
Combining statistical techniques to predict postsurgical risk of 1-year mortality for patients with colon cancer Authors: Arostegui, Inmaculada,Gonzalez, Nerea,Fernández-de-Larrea, Nerea,Lázaro-Aramburu, Santiago,Baré, Marisa,Redondo, Maximino,Sarasqueta, Cristina,Garcia-Gutierrez, Susana,Quintana, José M,REDISSEC CARESS-CCR Group Colorectal cancer is one of the most frequently diagnosed malignancies and a common cause of cancer-related mortality. The aim of this study was to develop and validate a clinical predictive model for 1-year mortality among patients with colon cancer who survive for at least 30 days after surgery.… Informa UK Limited	2018-03-01