Listar ICC_Articles por título

Mostrando ítems 178-197 de 414

    • closedAccess   Exploiting thread-level parallelism in the iterative solution of sparse linear systems 

      Aliaga Estellés, José Ignacio; Bollhöfer, Matthias; Martín Huertas, Alberto F.; Quintana-Orti, Enrique S. Elsevier (2011)
      We investigate the efficient iterative solution of large-scale sparse linear systems on shared-memory multiprocessors. Our parallel approach is based on a multilevel ILU preconditioner which preserves the mathematical ...

    • openAccess   Exploring 3-D Reconstruction Techniques: A Benchmarking Tool for Underwater Robotics 

      Pérez Soler, Javier; Sales Gil, Jorge; Peñalver Monfort, Antonio; Fornas Garcia, David; Fernández Fresneda, José Javier; García Sánchez, Juan Carlos; Sanz, Pedro J; Marin, Raul; Prats, Mario Institute of Electrical and Electronics Engineers (IEEE) (2015-09)
      When the results of research in the field of robotics are presented to the scientific community, the same question is asked repeatedly: Are the results really reproducible? Regarding benchmarking issues, some technological ...

    • closedAccess   Exploring large macromolecular functional motions on clusters of multicore processors 

      López Blanco, José R.; Reyes, Ruymán; Aliaga Estellés, José Ignacio; Badía Sala, Rosa María; Chacón, Pablo; Quintana-Orti, Enrique S. Elsevier (2013-08)
      Normal modes in internal coordinates (IC) furnish an excellent way to model functional collective motions of macromolecular machines, but exhibit a high computational cost when applied to large-sized macromolecules. In ...

    • closedAccess   Exploring multimodal interfaces for Underwater Intervention Systems 

      García Sánchez, Juan Carlos; Prats Sánchez, Mario; Sanz, Pedro J IEEE (2010)
      Graphical User Interfaces play a very important role in the context of Underwater Intervention Systems. Classical solutions, specially concerning Remotely Operated Vehicles, frequently require users with an advanced ...

    • closedAccess   Exploring stream parallel patterns in distributed MPI environments 

      López-Gómez, Javier; Fernández Muñoz, Javier; del Río Astorga, David; Dolz, Manuel F.; García, J. Daniel Elsevier (2019)
      In recent years, the large volumes of stream data and the near real-time requirements of data streaming applications have exacerbated the need for new scalable algorithms and programming interfaces for distributed and ...

    • openAccess   Exploring the interoperability of remote GPGPU virtualization using rCUDA and directive-based programming models 

      Castelló, Adrián; Pena, Antonio J.; Mayo, Rafael; Planas, Judit; Quintana-Orti, Enrique S.; Balaji, Pavan Springer (2016-06-21)
      Directive-based programming models, such as OpenMP, OpenACC, and OmpSs, enable users to accelerate applications by using coprocessors with little effort. These devices offer significant computing power, but their use can ...

    • closedAccess   Exploring the performance–power–energy balance of low-power multicore and manycore architectures for anomaly detection in remote sensing 

      León Navarro, Germán; Molero, Jose M.; Garzon, E.M.; García, I.; Plaza, Antonio; Quintana-Orti, Enrique S. Springer Verlag (2015)
      In this paper, we perform an experimental study of the interactions between execution time (i.e., performance), power, and energy that occur in modern low-power architectures when executing the RX algorithm for detecting ...

    • openAccess   Extending lyapack for the solution of band Lyapunov equations on hybrid CPU–GPU platforms 

      Benner, Peter; Remón Gómez, Alfredo; Dufrechou, Ernesto; Ezzatti, Pablo; Quintana-Orti, Enrique S. Springer Verlag (2015)
      The solution of large-scale Lyapunov equations is an important tool for the solution of several engineering problems arising in optimal control and model order reduction. In this work, we investigate the case when the ...

    • closedAccess   Extending OpenMP to Survive the Heterogeneous Multi-Core Era 

      Ayguadé, Eduardo; Badía Sala, Rosa María; Bellens, Pieter; Cabrera, Daniel; Durán, Alejandro; Ferrer, Roger; González, Marc; Igual, Francisco D.; Jiménez González, Daniel; Labarta Mancho, Jesús; Martinell, Luis; Martorell, Xavier; Mayo, Rafael; Pérez, Josep M.; Planas, Judit; Quintana-Orti, Enrique S. Springer US (2010)
      This paper advances the state-of-the-art in programming models for exploiting task-level parallelism on heterogeneous many-core systems, presenting a number of extensions to the OpenMP language inspired in the StarSs ...

    • closedAccess   Extending the Gauss-Huard method for the solution of Lyapunov matrix equations and matrix inversion 

      Benner, Peter; Ezzatti, Pablo; Quintana-Orti, Enrique S.; Remón, Alfredo Wiley (2017-05-10)
      The solution of linear systems is a recurrent operation in scientific and engineering applications, traditionally addressed via the LU factorization. The Gauss-Huard (GH) algorithm has been introduced as an efficient ...

    • closedAccess   Extending the technology acceptance model in remote pointing technology: identifying the role of perceived mobility and control 

      Park, Eunil; del Pobil, Angel P. Emerald (2013)
      Purpose – Despite the increasing popularity and interest in remote pointing devices such as Wii remote controllers, there have been few studies that find and evaluate the users' psychological aspects of technology acceptance. ...

    • closedAccess   Extracting invariant characteristics of sketch maps: Towards place query-by-sketch 

      Tang, Ming; Falomir, Zoe; Freksa, Christian; Sheng, Yehua; Lyu, Haiyang Wiley (2020-08-01)
      In geography, invariant aspects of sketches are essential to study because they reflect the human perception of real-world places. A person's perception of a place can be ex-pressed in sketches. In ...

    • openAccess   Facial recognition patterns of children and adults looking at robotic faces 

      del Pobil, Angel P.; Joon Kim, Ki; Park, Eunil In-Tech (2012)
      The present study investigates whether adults and children exhibit different eye‐fixation patterns when they look at human faces, machinelike robotic faces, and humanlike robotic faces. The results from two betweensub ...

    • closedAccess   Families of Algorithms for Reducing a Matrix to Condensed Form 

      Van Zee, Field G.; Van de Geijn, Robert A.; Quintana-Ortí, Gregorio; Elizondo, G. Joseph ACM (2012-11)
      In a recent paper it was shown how memory traffic can be diminished by reformulating the classic algorithm for reducing a matrix to bidiagonal form, a preprocess when computing the singular values of a dense matrix. The ...

    • openAccess   Fast Algorithms for the Computation of the Minimum Distance of a Random Linear Code 

      Hernando, Fernando; Igual, Francisco D.; Quintana-Ortí, Gregorio Association for Computing Machinery (ACM) (2019-06)
      The minimum distance of an error-correcting code is an important concept in information theory. Hence, computing the minimum distance of a code with a minimum computational cost is crucial to many problems in this area. ...

    • closedAccess   Fast and Reliable Noise Estimation for Hyperspectral Subspace Identification 

      Benner, Peter; Novaković, Vedran; Plaza, Antonio; Quintana-Orti, Enrique S. Institute of Electrical and Electronics Engineers (IEEE) (2015-02)
      In this letter, we introduce an efficient algorithm to estimate the noise correlation matrix in the initial stage of the hyperspectral signal identification by minimum error (HySime) method, commonly used for signal subspace ...

    • closedAccess   Fast block QR update in digital signal processing 

      Alventosa, Fran J.; Alonso-Jordá, Pedro; Vidal, Antonio M.; Piñero, Gema; Quintana-Orti, Enrique S. Springer (2019-03)
      The processing of digital sound signals often requires the computation of the QR factorization of a rectangular system matrix. However, sometimes, only a given (and probably small) part of the system matrix varies from the ...

    • openAccess   Fast k-NN classifier for documents based on a graph structure 

      Artigas Fuentes, Fernando; Gil García, Reynaldo; Badía, José; Pons Porrata, Aurora Springer Verlag (2010)
      In this paper, a fast k nearest neighbors (k-NN) classifier for documents is presented. Documents are usually represented in a high-dimensional feature space, where terms appeared on it are treated as features and the ...

    • closedAccess   Fast video transcoding from HEVC to VP9 

      De la Torre, Enrique; Rodríguez Sánchez, Rafael; Martínez, José Luis Institute of Electrical and Electronics Engineers (2015-10)
      HEVC and VP9 are the current state-of-the-art in video compression, since their bit-streams were recently finalized in January and May 2013, respectively. These codecs are the generational successors of the currently most ...

    • openAccess   FaST-LMM for Two-Way Epistasis Tests on High-Performance Clusters 

      Martínez Pérez, Héctor; Barrachina Mir, Sergio; Castillo Catalán, María Isabel; Quintana-Orti, Enrique S.; Rambla, Jordi; Farré, Xavier; Navarro, Arcadi Mary Ann Liebert (2018-08)
      We introduce a version of the epistasis test in FaST-LMM for clusters of multithreaded processors. This new software maintains the sensitivity of the original FaST-LMM while delivering acceleration that is close to linear ...