Now showing items 1-20 of 42

    • A comparative study of two compact finite difference methods: standard vs. mimetic 

      Córdova, Luis Joaquin; Rojas, Otilio; Otero Calviño, Beatriz; Castillo, José (Sociedad Venezolana de Métodos Numéricos en Ingeniería, 2014)
      Conference report
      Restricted access - publisher's policy
      In this work, we implement two fourth-order compact finite differences (CFD) methods and use them to model wave propagation on a elastic string. The formulation of the first method employs the standard implicit CFD constructed ...
    • A cost-efficient QoS-aware analytical model of future software content delivery networks 

      Otero Calviño, Beatriz; Rodríguez Luna, Eva; Rojas, Otilio; Verdú Mulà, Javier; Costa Prats, Juan José; Pajuelo González, Manuel Alejandro; Canal Corretger, Ramon (2020-08-31)
      Article
      Restricted access - publisher's policy
      Freelance, part-time, work-at-home, and other flexible jobs are changing the concept of workplace, and bringing information and content exchange problems to companies. Geographically spread corporations may use remote ...
    • A domain decomposition technique for pseudospectra computations 

      Astudillo, Reinaldo; Castillo, Zenaida; Otero Calviño, Beatriz (2013)
      Conference report
      Restricted access - publisher's policy
      The pseudospectra, a tool to study the behavior of systems associated with nonnormal matrices has been considered extremely useful in the last decades, for that reason there is a recent interest in its efficient computation. ...
    • A mimetic wave equation discretization with absorbing boundary condition: Formulation and application 

      Solano-Feo, Freysimar; Guevara-Jordan, Juan; Rojas_Ulacio, Otilio; González-Ramirez, Carlos; Otero Calviño, Beatriz (2016)
      Conference report
      Open Access
      The cornerstone of mimetic finite differentiation (FD) is that discrete gradients and divergences, in combination with a novel boundary flux operator satisfies an approximation to the Gauss–Divergence theorem. In this ...
    • A new mimetic scheme for the acoustic wave equation 

      Solano, Freysimar; Guevara-Jordan, Juan; Rojas, Otilio; Otero Calviño, Beatriz; Rodriguez, R. (2016-03-15)
      Article
      Open Access
      A new mimetic finite difference scheme for solving the acoustic wave equation is presented. It combines a novel second order tensor mimetic discretizations in space and a leapfrog approximation in time to produce an explicit ...
    • A performance analysis of a mimetic finite difference scheme for acoustic wave propagation on GPU platforms 

      Otero Calviño, Beatriz; Frances, Jorge; Rodriguez Cruz, Robert; Rojas, Otilio; Solano, Freysimar; Guevara-Jordan, Juan (2017-02-01)
      Article
      Open Access
      Realistic applications of numerical modeling of acoustic wave dynamics usually demand high-performance computing because of the large size of study domains and demanding accuracy requirements on simulation results. Forward ...
    • All-terminal reliability evaluation through a Monte Carlo simulation based on an MPI implementation 

      Pascual Martinez, Silvia; Otero Calviño, Beatriz; Rocco Sanseverino, Claudio M. (2012)
      Conference report
      Open Access
      All-terminal reliability (ATR), defined as the probability that every node in a network can communicate with every other node, is an important problem in research areas such as mobile ad-hoc wireless networks, grid computing ...
    • Alternating direction implicit time integrations for finite difference acoustic wave propagation: parallelization and convergence 

      Otero Calviño, Beatriz; Rojas, Otilio; Moya, Ferrán; Castillo, José (Elsevier, 2020-06-15)
      Article
      Restricted access - publisher's policy
      This work studies the parallelization and empirical convergence of two finite difference acoustic wave propagation methods on 2-D rectangular grids, that use the same alternating direction implicit (ADI) time integration. ...
    • Ambiences: on-the-fly usage of available resources through personal devices 

      Otero Calviño, Beatriz; Gil, Marisa (2013-10)
      Article
      Open Access
      In smart spaces such as smart homes, computation is embedded everywhere: in toys, appliances, or the home’s infrastructure. Most of these devices provide a pool of available resources which the user can take advantage, ...
    • Artificial neural networks as emerging tools for earthquake detection 

      Rojas, Otilio; Otero Calviño, Beatriz; Alvarado, Leonardo; Mus, Sergi; Tous Liesa, Rubén (2019)
      Article
      Open Access
      As seismic networks continue to spread and monitoring sensors become more ef¿cient, the abundance of data highly surpasses the processing capabilities of earthquake interpretation analysts. Earthquake catalogs are fundamental ...
    • Compact finite difference modeling of 2-D acoustic wave propagation 

      Córdova, Luis; Rojas, Otilio; Otero Calviño, Beatriz; Castillo, Jose (2016-03-15)
      Article
      Open Access
      We present two fourth-order compact finite difference (CFD) discretizations of the velocity–pressure formulation of the acoustic wave equation in 2-D rectangular grids. The first method uses standard implicit CFD on nodal ...
    • Distributed training of deep neural networks with spark: The MareNostrum experience 

      Cruz, Leonel; Tous Liesa, Rubén; Otero Calviño, Beatriz (Elsevier, 2019-07-01)
      Article
      Restricted access - publisher's policy
      Deployment of a distributed deep learning technology stack on a large parallel system is a very complex process, involving the integration and configuration of several layers of both, general-purpose and custom software. ...
    • Elaboración de aplicaciones interactivas para la docencia en el grado Grado de Telecomunicación 

      Francés, Jorge; Bleda, Sergio; Vera, J.; Calzado, E. M.; Heredia, S.; Otero Calviño, Beatriz; Hernández, A.; Hidalgo, A.; Méndez, D. I.; Yebra, M. S. (Universidad de Alicante, 2014)
      Conference report
      Open Access
      En este trabajo se muestran los avances realizados en el desarrollo de aplicaciones basadas en laboratorios virtuales para el estudio de la Acústica en el Grado de Telecomunicación. En particular se muestra la extensión ...
    • Estrategias de descomposición en dominios para entornos Grid 

      Otero Calviño, Beatriz (Universitat Politècnica de Catalunya, 2007-04-13)
      Doctoral thesis
      Open Access
      En este trabajo estamos interesados en realizar simulaciones numéricas basadas en elementos finitos con integración explícita en el tiempo utilizando la tecnología Grid.<br/>Actualmente, las simulaciones explícitas de ...
    • Estudio y evaluación de formatos de almacenamiento para matrices dispersas en arquitecturas multi-core 

      Pasarin, Marc; Otero Calviño, Beatriz; Herrero Zaragoza, José Ramón (2011-11-01)
      External research report
      Open Access
    • Examen Final 

      Valverde Amador, Antonio Javier; Otero Calviño, Beatriz; Monreal Arnal, Teresa; Jordán Fernández, Francisco; Gil Martín, Marçal (Universitat Politècnica de Catalunya, 2014-06-06)
      Exam
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    • Examen Final 

      Gil Martín, Marçal; Guerrero, M.; Jiménez, M.; Jordán Fernández, Francisco; Llorente Viejo, Silvia; Macias, M.; Monreal Arnal, Teresa; Otero Calviño, Beatriz; Valverde Amador, Antonio Javier (Universitat Politècnica de Catalunya, 2014-01-07)
      Exam
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    • Examen Final 

      Gil Martín, Marçal; Heredia, F.-Javier (Francisco Javier); Jiménez, M.; Macías Lloret, Mario; Monreal Arnal, Teresa; Pérez, J.L.; Otero Calviño, Beatriz; Valverde Amador, Antonio Javier (Universitat Politècnica de Catalunya, 2013-06-26)
      Exam
      Restricted access to the UPC academic community
    • Examen Final 

      Gil Martín, Marçal; Jordán Fernández, Francisco; Monreal Arnal, Teresa; Otero Calviño, Beatriz (Universitat Politècnica de Catalunya, 2015-06-15)
      Exam
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    • Examen Final 

      Heredero Lazaro, Ana M.; Jiménez Castells, Marta; Llorente Viejo, Silvia; Macías Lloret, Mario; Monreal Arnal, Teresa; Pérez Rico, José Luis; Otero Calviño, Beatriz; Valverde Amador, Antonio Javier; Guerrero Zapata, Josep Maria; Gil, Marisa (Universitat Politècnica de Catalunya, 2013-01-18)
      Exam
      Restricted access to the UPC academic community