Now showing items 1-20 of 926

  • 3D Elastic Full Waveform Inversion - On Land Study case 

    Kormann, Jean; Marti, David; Rodríguez, Juan E.; Marzan, Ignacio; Gutiérrez, Natalia; Ferrer, Miguel; Hanzich, Mauricio; de la Puente, Josep; Carbonell, Ramon; Cela, Jose M.; Fernández, S. (European Association of Geoscientists and Engineers, 2016-05-31)
    Conference report
    Open Access
    Full Waveform Inversion is one of the most advanced processing methods that is recently reaching a mature state after years of solving theoretical and technical issues such as the non-uniqueness of the solution and harnessing ...
  • 3D Simulations of Deep Directional Electromagnetic Tools in High-angle and Horizontal Wells 

    Puzyrev, Vladimir; Torres-Verdin, Carlos (2016-05-31)
    Conference lecture
    Open Access
    A new generation of deep directional electromagnetic imaging tools is being adopted by the industry to enhance the efficiency of well placement, reduce drilling risk and increase production potential. Schlumberger's GeoSphere ...
  • 3D Viscoelastic Anisotropic Seismic Modeling with High-Order Mimetic Finite Differences 

    Ferrer, Miguel; de la Puente, Josep; Farrés, Albert; Castillo, José E. (Springer, 2015)
    Part of book or chapter of book
    Open Access
    We present a scheme to solve three-dimensional viscoelastic anisotropic wave propagation on structured staggered grids. The scheme uses a fully-staggered grid (FSG) or Lebedev grid (Lebedev, J Sov Comput Math Math Phys ...
  • A case study of hybrid dataflow and shared-memory programming models: Dependency-based parallel game engine 

    Gajinov, Vladimir; Eric, Igor; Stojanovic, Saa; Milutinovic, Veljko; Unsal, Osman Sabri; Ayguadé Parra, Eduard; Cristal Kestelman, Adrián (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    Conference report
    Restricted access - publisher's policy
    Recently proposed hybrid dataflow and shared memory programming models combine these two underlying models in order to support a wider range of problems naturally. The effectiveness of such hybrid models for parallel ...
  • Accelerating Hash-Based Query Processing Operations on FPGAs by a Hash Table Caching Technique 

    Salami, Behzad; Arcas-Abella, Oriol; Sonmez, Nehir; Unsal, Osman; Cristal Kestelman, Adrián (Springer International Publishing, 2017-04-29)
    Conference lecture
    Open Access
    Extracting valuable information from the rapidly growing field of Big Data faces serious performance constraints, especially in the software-based database management systems (DBMS). In a query processing system, hash-based ...
  • Accelerating K-mer Frequency Counting with GPU and Non-Volatile Memory 

    Cadenelli, Nicola; Polo Bardés, Jordà; Carrera, David (IEEE, 2018-02-15)
    Conference lecture
    Open Access
    The emergence of Next Generation Sequencing (NGS) platforms has increased the throughput of genomic sequencing and in turn the amount of data that needs to be processed, requiring highly efficient computation for its ...
  • Acceleration strategies for elastic full waveform inversion workflows in 2D and 3D 

    Kormann, Jean; Rodríguez, Juan E.; Ferrer, Miguel; Farrés, Albert; Gutiérrez, Natalia; de la Puente, Josep; Hanzich, Mauricio; Cela, José M. (Springer International Publishing, 2017-02-01)
    Article
    Open Access
    Full waveform inversion (FWI) is one of the most challenging procedures to obtain quantitative information of the subsurface. For elastic inversions, when both compressional and shear velocities have to be inverted, the ...
  • Accurate ILP-Based Contention Modeling on Statically Scheduled Multicore Systems 

    Palomo, Xavier; Mezzetti, Enrico; Abella Ferrer, Jaume; Bril, Reinder J.; Cazorla, Francisco J. (IEEE, 2019-06-24)
    Conference lecture
    Open Access
    Commercially available Off The Shelf (COTS) multicores have been assessed as the baseline computing platform even in the most conservative real-time domains. Multicore contention arising on shared hardware resources, with ...
  • A CFD framework for offshore and onshore wind farm simulation 

    Avila, Matias; Gargallo-Peiró, Abel; Folch, Arnau (IOP Publishing, 2017)
    Article
    Open Access
    We present a wind simulation framework for offshore and onshore wind farms. The simulation framework involves an automatic hybrid high-quality mesh generation process, a pre-processing to impose initial and boundary ...
  • A checkpoint/restart directive-based approach 

    Maroñas Bravo, Marcos (Universitat Politècnica de Catalunya, 2017)
    Master thesis
    Open Access
    Covenantee:  Barcelona Supercomputing Center
    Exascale platforms require programming models incorporating support for resilience capabilities since the huge number of components they are expected to have is going to increase the number of errors. Checkpoint/restart ...
  • A Chimera method for the incompressible Navier-Stokes equations 

    Houzeaux, Guillaume; Eguzkitza, Beatriz; Aubry, Romain; Owen, Herbert; Vázquez, Mariano (John Wiley & Sons, 2014-05-30)
    Article
    Open Access
    The Chimera method was developed three decades ago as a meshing simplification tool. Different components are meshed independently and then glued together using a domain decomposition technique to couple the equations ...
  • A confidence assessment of WCET estimates for software time randomized caches 

    Benedicte Illescas, Pedro; Kosmidis, Leonidas; Quiñones, Eduardo; Abella Ferrer, Jaume; Cazorla Almeida, Francisco Javier (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    Conference report
    Open Access
    Obtaining Worst-Case Execution Time (WCET) estimates is a required step in real-time embedded systems during software verification. Measurement-Based Probabilistic Timing Analysis (MBPTA) aims at obtaining WCET estimates ...
  • A constellation of horrors: analysis and visualization of the #Cuéntalo movement 

    Bucalo Mana, María Soledad; Calvo, Luz; Cucchietti, Fernando; García Povedano, David; García Sáez, Artur; Gómez Celis, Juan Felipe; Arcadio González, Camilo; Marín, Guillermo; Reyes, Patricio; Serra Burriel, Feliu; Vélez García, Diana Fernanda; Meta, Irene (Association for Computing Machinery (ACM), 2019)
    Conference report
    Open Access
    In this work, we analyze content and structure of the Twitter trending topic #cuentalo with the purpose of providing a visualization of the movement. A supervised learning methodology is used to train the classifying ...
  • Active control of Alfvén eigenmodes inmagnetically confined toroidal plasmas 

    Garcia Muñoz, Manuel; Shaparov, Sergei; Zeeland, Michael A, Van; Ascasibar, Enrique; Cappa, Álvaro; Chen, L; Ferreira, J; Galdon Quiroga, Joaquin; Geiger, Benedikt; González Martin, J; Heidbrink, William W.; Johnson, T; Lauber, Phillipp; Mantsinen, Mervi; Melkinov, Alexander; Nabais, F; Rivero Rodríguez, Juan Francisco; Sanchis Sanchez, Lucía; Schneider, P; Stober, Jörg; Suttrop, Wolfgang; Todo, Yasushi; Vallejos, Pablo; Zonca, Fulvio; AUG and MST1 Teams (IOP Publishing, 2019-03)
    Article
    Open Access
    Alfvén waves are electromagnetic perturbations inherent to magnetized plasmas that can be driven unstable by a free energy associated with gradients in the energetic particles' distribution function. The energetic particles ...
  • Active flow control for external aerodynamics: from micro air vehicles to a full aircraft in stall 

    Lehmkuhl, Oriol; Lozano-Durán, Adrian; Rodríguez Pérez, Ivette María (Institute of Physics (IOP), 2020-04-01)
    Article
    Open Access
    We investigate the aerodynamic performance of active flow control of airfoils and wings using synthetic jets with zero net-mass flow. The study is conducted via wall-resolved and wall-modeled large-eddy simulation using ...
  • Active measurement of memory resource consumption 

    Casas, Marc; Bronevetsky, Greg (IEEE, 2014)
    Conference report
    Open Access
    Hierarchical memory is a cornerstone of modern hardware design because it provides high memory performance and capacity at a low cost. However, the use of multiple levels of memory and complex cache management policies ...
  • Active Measurement of the Impact of Network Switch Utilization on Application Performance 

    Casas, Marc; Bronevetsky, Greg (IEEE, 2014)
    Conference report
    Open Access
    Inter-node networks are a key capability of High-Performance Computing (HPC) systems that differentiates them from less capable classes of machines. However, in spite of their very high performance, the increasing ...
  • Active-Site-Directed Inhibitors of Prolyl Oligopeptidase Abolish Its Conformational Dynamics 

    López, Abraham; Herranz-Trillo, Fátima; Kotev, Martin; Gairí, Margarida; Guallar, Victor; Bernadó, Pau; Millet, Oscar; Tarragó, Teresa; Giralt, Ernest (Wiley, 2016-05-17)
    Article
    Open Access
    Deciphering conformational dynamics is crucial for understanding the biological functions of proteins and for designing compounds targeting them. In particular, providing an accurate description of microsecond–millisecond ...
  • Adaptation to environmental factors shapes the organization of regulatory regions in microbial communities 

    Fernandez, Leyden; Mercader, Josep M.; Planas-Fèlix, Mercè; Torrents, David (BioMed Central, 2014-10-08)
    Article
    Open Access
    Background: It has been shown in a number of metagenomic studies that the addition and removal of specific genes have allowed microbiomes to adapt to specific environmental conditions by losing and gaining specific functions. ...
  • Adapting TDMA arbitration for measurement-based probabilistic timing analysis 

    Panic, Milos; Abella Ferrer, Jaume; Quiñones, Eduardo; Hernandez, Carles; Ungerer, Theo; Cazorla, Francisco J. (Elsevier, 2017-07)
    Article
    Open Access
    Critical Real-Time Embedded Systems require functional and timing validation to prove that they will perform their functionalities correctly and in time. For timing validation, a bound to the Worst-Case Execution Time ...