Ponències/Comunicacions de congressos

Enviaments recents

  • A Massively Parallel Algorithm for the Approximate Calculation of Inverse p-th Roots of Large Sparse Matrices 

    Lass, Michael; Mohr, Stephan; Wiebeler, Hendrik; Kühne, Thomas D.; Plessl, Christian (Association for Computing Machinery (ACM), 2018-07)
    Comunicació de congrés
    Accés obert
    We present the submatrix method, a highly parallelizable method for the approximate calculation of inverse p-th roots of large sparse symmetric matrices which are required in different scientific applications. Following ...

  • Strategies to Improve the Performance of a Geophysics Model for Different Manycore Systems 

    Serpa, Matheus S.; Cruz, Eduardo H.M.; Diener, Matthias; Krause, Arthur M.; Navaux, Philippe O.A.; Farrés, Albert; Rosas, Claudia; Hanzich, Mauricio; Panetta, Jairo (IEEE, 2017-11-16)
    Comunicació de congrés
    Accés obert
    Many software mechanisms for geophysics exploration in Oil & Gas industries are based on wave propagation simulation. To perform such simulations, state-of-art HPC architectures are employed, generating results faster and ...

  • Modelling of combined ICRF and NBI heating in JET hybrid plasmas 

    Gallart, Dani; Mantsinen, Mervi; Challis, Clive; Frigione, Domenico; Graves, Jonathan; Hobirk, Joerg; Belonohy, Eva; Czarnecka, Agata; Eriksson, Jacob; Goniche, Marc; Hellesen, Carl; Jacquet, Philippe; Joffrin, Emmanuel; Krawczyk, Natalia; King, Damian; Lennholm, Morten; Lerche, Ernesto; Pawelec, Ewa; Sips, George; Solano, Emilia; Tsalas, Maximos; Valisa, Marco; JET Contributors (EDP Sciences, 2017-10-23)
    Article
    Accés obert
    During the 2015-2016 JET campaigns many efforts have been devoted to the exploration of high performance plasma scenarios envisaged for ITER operation. In this paper we model the combined ICRF+NBI heating in selected key ...

  • Nonlinear electromagnetic stabilization of ITG microturbulence by ICRF-driven fast ions in ASDEX Upgrade 

    de Oliveira, F.N.; Doerk, H.; Mantsinen, Mervi J.; Angioni, C.; Bilato, R.; Bobkov, V.; Dunne, M.; Gallart, D.; Gutiérrez-Milla, A.; Mantica, P.; Odstrcil, T.; Tardini, G.; Sáez, Xavier; ASDEX Upgrade Team; EUROfusion MST1 Team (2016-10)
    Comunicació de congrés
    Accés obert
    Electromagnetic waves in the range of Ion Cyclotron Resonance Frequencies (ICRF) have many applications in fusion devices. While their use for external heating of magnetically confined fusion plasmas is well established, ...

  • Evaluating directive-based programming models on Wave Propagation Kernels 

    Rodriguez, Samuel; Farré, Pau; Rosas, Claudia; Hanzich, Mauricio (EAGE, 2017-06-12)
    Comunicació de congrés
    Accés obert
    HPC systems have become mandatory to tackle the ever-increasing challenges imposed by new exploration areas around the world. The requirement for more HPC resources depends on the complexity of the area under exploration, ...

  • Optimizing Fully Anisotropic Elastic Propagation on 2nd Generation Intel Xeon Phi Processors 

    Farres, Albert; Duran, A.; Rosas, Claudia; Hanzich, Mauricio; Yount, C.; Fernandez, S. (2017-06-12)
    Comunicació de congrés
    Accés obert
    This work shows several optimization strategies evaluated and applied to an elastic wave propagation engine, based on a Fully Staggered Grid, running on the latest Intel Xeon Phi processors, the second generation of the ...

  • Three-Dimensional CSEM Modelling on Unstructured Tetrahedral Meshes Using Edge Finite Elements 

    Castillo-Reyes, Octavio; de la Puente, Josep; Cela, Jose M. (Springer International Publishing, 2017-04-29)
    Comunicació de congrés
    Accés obert
    The last decade has been a period of rapid growth for electromagnetic methods (EM) in geophysics, mostly because of their industrial adoption. In particular, the marine controlled-source electromagnetic method (CSEM) has ...

  • Performance Evaluation of Multiple Cloud Data Centers Allocations for HPC 

    Roloff, Eduardo; Carreño, Emmanuell D.; Valverde-Sanchez, Jimmy K.M.; Diener, Matthias; Serpa, Matheus da Silva; Houzeaux, Guillaume; Schnorr, Lucas M.; Maillard, Nicolas; Gaspary, Luciano P.; Navaux, Philippe (Springer International Publishing, 2017-04-29)
    Comunicació de congrés
    Accés obert
    This paper evaluates the behavior of the Microsoft Azure G5 cloud instance type over multiple Data Centers. The purpose is to identify if there are major differences between them and to help the users choose the best option ...

  • Study of the Wall Thermal Condition Effect in a Lean-Premixed Downscaled Can Combustor Using Large-Eddy Simulation 

    Mira, Daniel; Vázquez, Mariano; Houzeaux, Guillaume; Gövert, Simon; Kok, Jim W.B.; Mahiques, E.I.; Panek, Lukasz (American Society of Mechanical Engineers, 2016-06-13)
    Comunicació de congrés
    Accés obert
    The primary purpose of this study is to evaluate the ability of LES, with a turbulent combustion model based on steady flamelets, to predict the flame stabilization mechanisms in an industrial can combustor at full load ...

  • Radiation-Induced Error Criticality in Modern HPC Parallel Accelerators 

    Oliveira, Daniel; Pilla, Laercio; Hanzich, Mauricio; Fratin, Vinicius; Fernandes, Fernando; Lunardi, Caio; Cela, Jose M.; Navaux, Philippe; Carro, Luigi; Rech, Paolo (2016-03)
    Comunicació de congrés
    Accés obert
    In this paper, we evaluate the error criticality of radiation-induced errors on modern High-Performance Computing (HPC) accelerators (Intel Xeon Phi and NVIDIA K40) through a dedicated set of metrics. We show that, as long ...

  • Non-linear MHD Simulation s of Pellet Triggered ELMs in JET and ASDEX Upgrade tokamaks 

    Futatani, Shimpei; Pamela, S.; Huijsmans, G.T.A.; Garzotti, L.; Frigione, D.; Loarte, D.; Hoelzl, M.; Lang, P.T.; Kocsis, G.; Orain, F.; Dunne, M.; Lessig, A.; Mantsinen, Mervi; EUROfusion MST1 Team; ASDEX Upgrade Team; JET Contributors (2016-07-08)
    Accés obert
    ITER operation in its high fusion performance DT scenarios relies on the achievement of the H-mode confinement regime, which is expected to lead to the quasi-periodic triggering of ELMs (Edge Localized Modes). ...

  • Improving edge finite element assembly for geophysical electromagnetic modelling on shared-memory architectures 

    Castillo-Reyes, Octavio; de la Puente, Josep; Cela, Jose M. (IEE, 2016-12-12)
    Text en actes de congrés
    Accés obert
    This work presents a set of node-level optimizations to perform the assembly of edge finite element matrices that arise in 3D geophysical electromagnetic modelling on shared-memory architectures. Firstly, we describe the ...

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