Listar Departament: Enginyeria i Ciència dels Computadors por título

Mostrando ítems 322-341 de 540

    • closedAccess   Large-scale linear system solver using secondary storage: self-energy in hybrid nanostructures 

      Badía, José; Movilla, Jose L.; Climente, Juan I.; Castillo Catalán, María Isabel; Marqués-Andrés, Mercedes; Mayo, Rafael; Quintana-Orti, Enrique S.; Planelles, Josep Elsevier (2011-02)
      We present a Fortran library which can be used to solve large-scale dense linear systems, Ax=b. The library is based on the LU decomposition included in the parallel linear algebra library PLAPACK and on its out-of-core ...

    • openAccess   Learning Cognitive-Affective Digital Twins from Social Networks 

      Navarro, Andrea; Berlanga Llavori, Rafael; Museros, Lledó IOS Press (2021-10)
      This paper presents an ongoing project about the implementation of digital twins (DT) for simulating cognitive-affective behaviours in social networks. Our approach relies on a pure data-driven solution, which takes ...

    • openAccess   Learning the visual-oculomotor transformation: Effects on saccade control and space representation 

      Antonelli, Marco; Durán Bosch, Angel Juan; Chinellato, Eris; del Pobil, Angel P. Elsevier (2015-09)
      Active eye movements can be exploited to build a visuomotor representation of the surrounding environment. Maintaining and improving such representation requires to update the internal model involved in the generation of ...

    • closedAccess   Let’s Talk about k-NN for Indoor Positioning: Myths and Facts in RF-based Fingerprinting 

      Torres-Sospedra, Joaquín; Pendão, Cristiano; Silva, Ivo; Meneses, Filipe; Quezada Gaibor, Darwin; Montoliu Colás, Raul; Crivello, Antonino; Barsocchi, Paolo; Pérez-Navarro, Antoni; Moreira, Adriano Institute of Electrical and Electronics Engineers Inc. (2023-09-25)
      Microsoft proposed RADAR in 2000, the first indoor positioning system based on Wi-Fi fingerprinting. Since then, the indoor research community has worked not only to improve the base estimator but also on finding an optimal ...

    • openAccess   Level-3 BLAS on a GPU: Picking the Low Hanging Fruit 

      Quintana-Ortí, Gregorio; Van de Geijn, Robert A. Departament d' Enginyeria i Ciència dels Computadors, Universitat Jaume I (2009-04)
      The arrival of hardware accelerators has created a new gold rush to be the rst to deliver their promise of high performance for numerical applications. Since they are relatively hard to program, with limited language ...

    • closedAccess   Leveraging Task-Parallelism in Energy-Efficient ILU Preconditioners 

      Aliaga Estellés, José Ignacio; Dolz, Manuel F.; Martín Huertas, Alberto F.; Mayo, Rafael; Quintana-Orti, Enrique S. Springer Berlin Heidelberg (2012)
      We analyze the energy-performance balance of a task-parallel computation of an ILU-based preconditioner for the solution of sparse linear systems on multi-core processors. In particular, we elaborate a theoretical model ...

    • closedAccess   Leveraging task-parallelism in message-passing dense matrix factorizations using SMPSs 

      Martín, Alberto F.; Reyes, Ruymán; Badía Sala, Rosa María; Quintana-Orti, Enrique S. Elsevier (2014)
      In this paper, we investigate how to exploit task-parallelism during the execution of the Cholesky factorization on clusters of multicore processors with the SMPSs programming model. Our analysis reveals that the major ...

    • openAccess   Leveraging workflow control patterns in the domain of clinical practice guidelines 

      Kaiser, Katharina; Marcos, Mar BioMed Central Ltd (2016-02-10)
      Background: Clinical practice guidelines (CPGs) include recommendations describing appropriate care for the management of patients with a specific clinical condition. A number of representation languages have been developed ...

    • closedAccess   Load-balancing Sparse Matrix Vector Product Kernels on GPUs 

      Anzt, Hartwig; Cojean, Terry; Yen-Chen, Chen; Dongarra, Jack; Flegar, Goran; Nayak, Pratik; Tomov, Stanimire; Tsai, Yuhsiang M.; Wang, Weichung Association for Computing Machinery (ACM) (2020-03)
      Efficient processing of Irregular Matrices on Single Instruction, Multiple Data (SIMD)-type architectures is a persistent challenge. Resolving it requires innovations in the development of data formats, computational ...

    • openAccess   Localization of Mobile sensors and actuators for intervention in low-visibility conditions: the ZigBee fingerprinting approach 

      Martí Avilés, José Vicente; Sales Gil, Jorge; Marin, Raul; Jiménez Ruiz, Ernesto Hindawi Publishing Corporation (2012)
      Indoor localization in smoke conditions is one of the EU GUARDIANS project goals. When smoke density grows, optical sensors such as laser range finders and cameras cease to be efficient. Zigbee sensor networks provide an ...

    • openAccess   Look-ahead in the two-sided reduction to compact band forms for symmetric eigenvalue problems and the SVD 

      Rodríguez Sánchez, Rafael; Catalán, Sandra; Herrero, José R.; Quintana-Orti, Enrique S.; Tomás Domínguez, Andrés Enrique Springer Verlag (2019)
      We address the reduction to compact band forms, via unitary similarity transformations, for the solution of symmetric eigenvalue problems and the computation of the singular value decomposition (SVD). Concretely, in the ...

    • openAccess   Machine learning-based prediction model for battery levels in IoT devices using meteorological variables 

      Zurita Macias, Juan Emilio; Trilles, Sergio Elsevier (2024-04-01)
      Efficient energy management is vital for the sustainability of IoT devices employing solar harvesting systems, particularly to circumvent battery depletion during periods of diminished solar incidence. Embracing the ...

    • closedAccess   Malleability Implementation in a MPI Iterative Method 

      Martín Álvarez, Iker; Aliaga Estellés, José Ignacio; Castillo Catalán, María Isabel; Mayo, Rafael; Iserte, Sergio IEEE (2021-09)
      In this poster is evaluated the data redistribution stage for two malleable versions of the Conjugate Gradient. One version is based on synchronous communications, while the other one uses asynchronous communications to ...

    • openAccess   Manipulation primitives: A paradigm for abstraction and execution of grasping and manipulation tasks 

      Felip León, Javier; Laaksonen, J.; Morales, Antonio; Kyrki, V. Elsevier (2013-03)
      Sensor-based reactive and hybrid approaches have proven a promising line of study to address imperfect knowledge in grasping and manipulation. However the reactive approaches are usually tightly coupled to a particular ...

    • openAccess   (MARGOT) Monocular Camera-Based Robot Grasping Strategy for Metallic Objects 

      Veiga Almagro, Carlos; Munoz, Renato; García González, Álvaro; Matheson, Eloise; Marin, Raul; Di Castro, Mario; FERRE PEREZ, MANUEL MDPI (2023-06-05)
      Robotic handling of objects is not always a trivial assignment, even in teleoperation where, in most cases, this might lead to stressful labor for operators. To reduce the task difficulty, supervised motions could be ...

    • openAccess   Matrix inversion on CPU–GPU platforms with applications in control theory 

      Benner, Peter; Ezzatti, Pablo; Quintana-Orti, Enrique S.; Remón Gómez, Alfredo Wiley (2013-06-10)
      In this paper, we tackle the inversion of large-scale dense matrices via conventional matrix factorizations (LU, Cholesky, and LDLT) and the Gauss–Jordan method on hybrid platforms consisting of a multicore CPU and a ...

    • openAccess   Measures of Similarity Between Objects Based on Qualitative Shape Descriptions 

      Falomir, Zoe; Gonzalez Abril, Luis; Museros, Lledó; Ortega, Juan Antonio Taylor & Francis (2013)
      A computational approach for comparing qualitative shape descriptions (QSDs) of objects within digital images is presented. First, the dissimilarity of qualitative features of shape is measured: (i) intuitively using ...

    • openAccess   Measures of Similarity between Qualitative Descriptions of Shape, Colour and Size Applied to Mosaic Assembling 

      Falomir, Zoe; Museros, Lledó; Gonzalez Abril, Luis; Velasco, Francisco Elsevier (2013)
      A computational approach for obtaining a similarity measure between qualitative descriptions of shape, colour and size of objects within digital images is presented. According to the definition of the qualitative features, ...

    • openAccess   Mejora de la calidad de vida de las personas mayores en sus domicilios a través de la tecnología de localización de interiores 

      Caballer Miedes, Antonio; Belmonte-Fernández, Óscar; Montoliu Colás, Raul; Segarra-Ciprés, Mercedes; Sansano-Sansano, Emilio; Bayarri Iturralde, Pilar; Gascó, Arturo Col·legi Oficial de Psicologia de la Comunitat Valenciana (2018-11-08)
      La propensión a vivir en soledad aumenta con la edad y suele ser sobre todo femenina en la vejez. En España, según datos del INE publicados en 2018, había 4.687.400 personas viviendo solas en el año 2017. De esta cifra, ...

    • openAccess   MERBOTS: New approach for semi-autonomous underwater manipulation using force sensing in archaeological scenarios 

      Peñalver Monfort, Antonio; Sanz, Pedro J Universitat Jaume I. Departament d'Enginyeria i Ciència dels Computadors (2016-06-14)