Publications

Displaying 851 - 875 of 1307

Publication	Date
Analysis of quantization effects on the performance of cooperative MIMO techniques in wireless networks Authors: Seyed Pooya Shariatpanahi,Javier Del Ser,Babak Hossein Khalaj,Hamed Shah-Mansouri Abstract The most successful achievable schemes for ad hoc wireless networks are those based on establishing cooperative multiple-input and multiple-output links. In this article, we analyze one of the important design parameters of such schemes, namely the number of quantization bits.… Springer Science and Business Media LLC	2012-09-18
Probing clouds in planets with a simple radiative transfer model: the Jupiter case Authors: Santiago Pérez-Hoyos,Agustín Sánchez-Lavega,I. Mendikoa Remote sensing of planets evokes using expensive on-orbit satellites and gathering complex data from space. However, the basic properties of clouds in planetary atmospheres can be successfully estimated with small telescopes even from an urban environment using currently available and affordable… IOP Publishing	2012-09-12
Differentiation in the Cloud: Methodology for Integrating Customer Values in Experience Design Authors: Bronan McCabe,Javier Del Ser,Kaisa Koskela-Huotari,Kaarina Karppinen,Andrey Sirotkin How do organizations know they are designing products and services that their customers will value? This paper describes the initial results of the first four stages of a methodology for integrating customer Values in Experience design (ViEx). The theory of universal value structure was adapted to… IEEE	2012-09-01
Mobile clouds: How to find opportunities Authors: Parishad Karimi,Mohammad Javad Salehi,Ghazal Fazelnia,Babak Hossein Khalaj,Marcos Katz,Javier Del Ser Smartphones can be regarded as resource pools which are capable of communicating with their outside world using both short-range and long-range links. Such communication capabilities provide a unique opportunity for sharing resources, resulting in new possibilities for end users. In this paper, we… IEEE	2012-09-01
A comparative study of two hybrid grouping evolutionary techniques for the capacitated P-median problem Authors: Itziar Landa-Torres,J. Del Ser,Sergio Gil-Lopez,Jose A. Portilla-Figueras,O. Alonso-Garrido,Sancho Salcedo-Sanz This paper addresses the application of two different grouping-based algorithms to the so-called capacitated P-median problem (CPMP). The CPMP is an NP-complete problem, well-known in the operations research field, arising from a wide spectrum of applications in diverse fields such as… Elsevier BV	2012-09-01
A discrete Particle Swarm Optimization Algorithm for Mobile Network Deployment Problems Authors: J. Plaza-Laina,J. Del Ser,Antonio Portilla-Figueras,P. Garcia-Diaz,Sancho Salcedo-Sanz In this paper we present a hybrid discrete Particle Swarm Optimization (PSO) algorithm for the Mobile Network Deployment Problem (MNDP). First, we fully describe the MNDP, including a term for taking into account the Electromagnetic field produced by new locations of BTSs. We also describe the… IEEE	2012-09-01
A preliminary approach to near-optimal multi-hop capacitated network design using grouping-dandelion encoded heuristics Authors: J. Del Ser,Sergio Gil-Lopez,Itziar Landa-Torres,Diana Manjarres,Sancho Salcedo-Sanz In this paper we outline a novel global heuristic tool to deal with a combination of the Capacitated P-Median (CPMP) and the Capacitated Minimum Spanning Tree (CMST) problems. This preliminary approach provides an efficient (in terms of power consumption due to emission or signal interferences)… IEEE	2012-09-01
Spectrum band and RAT selection for infrastructure governed opportunistic networks Authors: Marja Matinmikko,Miia Mustonen,Javier Del Ser,Marko Hoyhtya,Heli Sarvanko This paper presents a modular decision flow for the selection of radio access technique (RAT), carrier frequency, and bandwidth for opportunistic networks that are operator governed temporary extensions of mobile communication network infrastructures. In this study the emphasis is placed on finding… IEEE	2012-09-01
A heuristically-driven multi-criteria tool for the design of efficient open WiFi access networks Authors: Sancho Salcedo-Sanz,Itziar Landa-Torres,Diana Manjarres,Sergio Gil-Lopez,J. Del Ser This paper presents a novel heuristic multi-criteria tool capable of generating open-access wireless network deployments by exploiting the existing broadband infrastructure. Specifically, an external user dynamically selects, by virtue of our proposed scheme, a certain network layout depending on… IEEE	2012-09-01
Approaching Sentiment Analysis by using semi-supervised learning of multi-dimensional classifiers Authors: Manuel Lucania,Jose A. Lozano,Iñaki Inza,J.D. Rodriguez,Jonathan Ortigosa-Hernández,Leandro Alzate Sentiment Analysis is defined as the computational study of opinions, sentiments and emotions expressed in text. Within this broad field, most of the work has been focused on either Sentiment Polarity classification, where a text is classified as having positive or negative sentiment, or… Elsevier BV	2012-09-01
PATHS: Personalising access to cultural heritage spaces Authors: Fernie K.,Griffiths J.,Stevenson M.,Clough P.,Goodale P.,Hall M.,Archer P.,Chandrinos K.,Agirre E.,De Lacalle O.L. Digitisation of the cultural heritage means that a significant amount of material is now available through online digital library portals. However, the vast quantity of cultural heritage material can also be overwhelming for many users who lack knowledge of the collections, subject knowledge and… IEEE	2012-09-01
A high-temporal resolution algorithm to discriminate shockable from nonshockable rhythms in adults and children Authors: Elisabete Aramendi,Unai Irusta,Jesus Ruiz,Sofía Ruiz de Gauna,Erik Alonso,Unai Ayala To design the core algorithm of a high-temporal resolution rhythm analysis algorithm for automated external defibrillators (AEDs) valid for adults and children. Records from adult and paediatric patients were used all together to optimize and test the performance of the algorithm.A total of 574… Elsevier BV	2012-09-01
On the design of an heuristically optimized multiband spectrum sensing approach for cognitive radio systems Authors: A. Alonso,Uli Kretzschmar,J. Del Ser,Sergio Gil-Lopez,Armando Astarloa,M. Garay This extended abstract outlines a novel optimization approach for multi-band linear collaborative spectrum (LCS) sensing based on harmony search heuristics. Besides, the description of a centralized system architecture is also included in this manuscript, which is capable of processing the captured… IEEE	2012-09-01
A hybrid harmony search algorithm for the spread spectrum radar polyphase codes design problem Authors: Ángel M. Pérez-Bellido,Jose A. Portilla-Figueras,Javier Del Ser,Sancho Salcedo-Sanz,Sergio Gil-Lopez,José María Cabero In this paper we present the application of a hybrid harmony search (HS) algorithm to the Spread-Spectrum Radar Polyphase (SSRP) codes design. Such a design can be formulated as a non-linear max-min optimization problem, hard to be solved using classical numerical techniques. Soft-computing… Elsevier BV	2012-09-01
Hydrofracture diagnosis in open-hole and steel-cased wells using borehole resistivity measurements Authors: Carlos Torres-Verdín,David Pardo This work numerically evaluates the possibility of using electromagnetic (EM) measurements to diagnose and quantify hydraulic fractures that are artificially generated in a horizontal well. Hydrofractures are modeled as thin disks that are possibly non-perpendicular to the well, and are filled with… Society of Exploration Geophysicists	2012-09-01
Flexible Channel Coding Approach for Short-Length Codewords Authors: Mikel Hernaez,Javier Del Ser,Pedro M. Crespo 4 pages; submitted to IEEE Communications Letters Institute of Electrical and Electronics Engineers (IEEE)	2012-09-01
On the stability of self-similar solutions of 1D cubic Schrödinger equations Authors: Susana Gutiérrez,Luis Vega 38 pages, 8 figures Springer Science and Business Media LLC	2012-08-28
Molecular Dynamics Simulations of Iron- and Aluminum-Loaded Serum Transferrin: Protonation of Tyr188 Is Necessary To Prompt Metal Release Authors: Mujika, J.I.,Escribano, B.,Akhmatskaya, E.,Ugalde, J.M.,Lopez, X. Serum transferrin (sTf) carries iron in blood serum and delivers it into cells by receptor-mediated endocytosis. The protein can also bind other metals, including aluminum. The crystal structures of the metal-free and metal-loaded protein indicate that the metal release process involves an opening… American Chemical Society (ACS)	2012-08-23
A novel heuristic approach for distance- and connectivity-based multihop node localization in wireless sensor networks Authors: Manjarres, D.,Del Ser, J.,Gil-Lopez, S.,Vecchio, M.,Landa-Torres, I.,Lopez-Valcarce, R. The availability of accurate location information of constituent nodes becomes essential in many applications of wireless sensor networks. In this context, we focus on anchor-based networks where the position of some few nodes are assumed to be fixed and known a priori, whereas the location of all… Springer Science and Business Media LLC	2012-08-02
EChO Authors: Tinetti J.-P. Beaulieu T. Henning M. Meyer G. Micela I. Ribas D. Stam M. Swain O. Krause M. Ollivier E. Pace B. Swinyard A. Aylward R. van Boekel A. Coradini T. Encrenaz I. Snellen M. R. Zapatero-Osorio J. Bouwman J. Y. K. Cho V. Coudé Du Foresto T.… A dedicated mission to investigate exoplanetary atmospheres represents a major milestone in our quest to understand our place in the universe by placing our Solar System in context and by addressing the suitability of planets for the presence of life. EChO -the Exoplanet Characterisation… Springer Science and Business Media LLC	2012-08-02
Evaluating the Internationalization Success of Companies Through a Hybrid Grouping Harmony Search—Extreme Learning Machine Approach Authors: J.M. Leiva-Murillo,Sergio Gil-Lopez,M. Miranda,Itziar Landa-Torres,Sancho Salcedo-Sanz,J. Del Ser,María Jesús Segovia-Vargas,E. G. Ortiz-Garcia The internationalization of a company is widely understood as the corporative strategy for growing through external markets. It usually embodies a hard process, which affects diverse activities of the value chain and impacts on the organizational structure of the company. There is not a general… Institute of Electrical and Electronics Engineers (IEEE)	2012-08-01
Ground-based observations of the long-term evolution and death of Saturn’s 2010 Great White Spot Authors: Ricardo Hueso,Agustín Sánchez-Lavega,Jon Legarreta,Enrique Garcia-Melendo,David Barrado-Navascués,M. Delcroix,Santiago Pérez-Hoyos,Josep M. Gomez-Forrellad,Teresa del Río-Gaztelurrutia,Jorge Lillo We report on the long-term evolution of Saturn’s sixth Great White Spot (GWS) event that initiated at northern mid-latitudes of the planet on December 5th, 2010 (Fletcher, L. et al. [2011]. Science 332, 1413–1417; Sanchez-Lavega, A. et al. [2011]. Nature 475, 71–74; Fischer, G. et al. [2011].… Elsevier BV	2012-08-01
A new grouping genetic algorithm for clustering problems Authors: L. E. Agustín-Blas,Sancho Salcedo-Sanz,Jose A. Portilla-Figueras,J. Del Ser,Silvia Jiménez-Fernández,L. Carro-Calvo Highlights? A hybrid grouping-encoding algorithm for clustering problems is presented. ? Details on the encoding, operators and parallelization are given. ? Results in synthetic and real clustering problems are provided. In this paper we present a novel grouping genetic algorithm for clustering… Elsevier BV	2012-08-01
Dynamic modeling of the morphology of multiphase waterborne polymer particles Authors: Akhmatskaya, E.,Asua, J.M. Multiphase waterborne polymer particles provide advantages in more demanding applications, and their performance depends on particle morphology. Currently, no dynamic model for the prediction of the development of the morphology of multiphase latex particles is available. In this work, a model was… Springer Science and Business Media LLC	2012-07-29
Evolving NK-complexity for evolutionary solvers Authors: Alexander Mendiburu,Jose A. Lozano,Roberto Santana In this paper we empirically investigate the structural characteristics that can help to predict the complexity of NK-landscape instances for estimation of distribution algorithms (EDAs). We evolve instances that maximize the EDA complexity in terms of its success rate. Similarly, instances that… ACM	2012-07-07