Now showing items 1-20 of 1097

    • 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 ...
    • 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 ...
    • 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 cross-layer review of deep learning frameworks to ease their optimization and reuse 

      Tabani, Hamid; Pujol Torramorell, Roger; Abella Ferrer, Jaume; Cazorla Almeida, Francisco Javier (Institute of Electrical and Electronics Engineers (IEEE), 2020)
      Conference report
      Open Access
      Machine learning and especially Deep Learning (DL) approaches are at the heart of many domains, from computer vision and speech processing to predicting trajectories in autonomous driving and data science. Those approaches ...
    • A data-centric directive-based framework to accelerate out-of-core stencil computation on a GPU 

      Shen, Jingcheng; Ino, Fumihiko; Farrés Coma, Albert; Hanzich, Mauricio (Institute of Electronics, Information and Communication Engineers, 2020-12-01)
      Article
      Open Access
      Graphics processing units (GPUs) are highly efficient architectures for parallel stencil code; however, the small device (i.e., GPU) memory capacity (several tens of GBs) necessitates the use of out-of-core computation to ...
    • A Demo of FPGA Aggressive Voltage Downscaling: Power and Reliability Tradeoffs 

      Salami, Behzad; Unsal, Osman Sabri; Cristal Kestelman, Adrián (IEEE, 2018-12-06)
      Conference lecture
      Open Access
      The power consumption of digital circuits, e.g., Field Programmable Gate Arrays (FPGAs), is directly related to their operating supply voltages. On the other hand, usually, chip vendors introduce a conservative voltage ...
    • A detailed methodology to compute soft error rates in advanced technologies 

      Riera Villanueva, Marc; Canal Corretger, Ramon; Abella Ferrer, Jaume; González Colás, Antonio María (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Conference report
      Restricted access - publisher's policy
      System reliability has become a key design aspect for computer systems due to the aggressive technology miniaturization. Errors are typically dominated by transient faults due to radiation and are strongly related to the ...
    • A directive-based approach to perform persistent checkpoint/restart 

      Maroñas, Marcos; Mateo, Sergi; Beltran Querol, Vicenç; Ayguadé Parra, Eduard (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Conference report
      Restricted access - publisher's policy
      Exascale platforms require support for resilience capabilities due to increasing numbers of components and associated error rates. In this paper, we present a new directive-based approach to perform application-level ...
    • A distortion measure to validate and generate curved high-order meshes on CAD surfaces with independence of parameterization 

      Gargallo-Peiró, Abel; Roca, Xevi; Peraire, Jaume; Sarrate Ramos, Josep (Wiley Online Library, 2015-12-15)
      Article
      Open Access
      A framework to validate and generate curved nodal high-order meshes on Computer-Aided Design (CAD) surfaces is presented. The proposed framework is of major interest to generate meshes suitable for thin-shell and 3D finite ...
    • A fault-tolerant algorithm for distributed resource allocation 

      Pessolani, Pablo; Jara, Oscar; Gonnet, Silvio; Cortés, Toni; Tinetti, Fernando (2017-11-01)
      Article
      Open Access
      Resource allocation is a usual problem that must be faced during a distributed system design. Despite the large number of algorithms proposed in literature to solve this problem, most papers lack of detailed descriptions ...
    • A framework to assess the quality and impact of bioinformatics training across ELIXIR 

      Gurwitz, Kim T.; Singh Gaur, Prakash; Bellis, Louisa J.; Larcombe, Lee; Alloza, Eva; Laszlo Balint, Balint; Botzki, Alexander; Dimec, Jure; Dominguez del Angel, Victoria; Fernandes, Pedro L.; Korpelainen, Eija; Krause, Roland; Kuzak, Mateusz; Le Pera, Loredana; Leskošek, Brane; Lindvall, Jessica M.; Marek, Diana; Martinez, Paula A.; Muyldermans, Tuur; Nygård, Ståle; Palagi, Patricia M.; Peterson, Hedi; Psomopoulos, Fotis; Spiwok, Vojtech; Gelder, Celia W. G. van; Via, Allegra; Vidak, Marko; Wibberg, Daniel; Morgan, Sarah L.; Rustici, Gabriella (Public Library of Science (PLOS), 2020-07)
      Article
      Open Access
      ELIXIR is a pan-European intergovernmental organisation for life science that aims to coordinate bioinformatics resources in a single infrastructure across Europe; bioinformatics training is central to its strategy, which ...
    • A fully parameterizable low power design of vector fused multiply-add using active clock-gating techniques 

      Ratkovic, Ivan; Palomar, Oscar; Stanic, Milan; Unsal, Osman Sabri; Cristal Kestelman, Adrián; Valero Cortés, Mateo (Association for Computing Machinery (ACM), 2016)
      Conference report
      Restricted access - publisher's policy
      The need for power-efficiency is driving a rethink of design decisions in processor architectures. While vector processors succeeded in the high-performance market in the past, they need a re-tailoring for the mobile market ...
    • A Functional Safety OpenMP∗ for Critical Real-Time Embedded Systems 

      Royuela, Sara; Duran, Alejandro; Serrano, Maria A.; Quiñones, Eduardo; Martorell, Xavier (Springer, 2017-08-17)
      Part of book or chapter of book
      Open Access
      OpenMP* has recently gained attention in the embedded domain by virtue of the augmentations implemented in the last specification. Yet, the language has a minimal impact in the embedded real-time domain mostly due to the ...