• Goal-Oriented p-Adaptivity using Unconventional Error Representations for a 1D Steady State Convection-Diffusion Problem 

  Pardo D.; Darrigrand V.; Rodríguez-Rozas A.; Muga I. (Procedia Computer Science, 2017)

  This work proposes the use of an alternative error representation for Goal-Oriented Adaptivity (GOA) in context of steady state convection dominated diffusion problems. It introduces an arbitrary operator for the computation ...

• ICCS 2017 Workshop on Agent-Based Simulations, Adaptive Algorithms and Solvers 

  Byrski A.; Paszyński M.; Schaefer R.; Calo VM.; Pardo D. (Procedia Computer Science, 2017)

  This workshop seeks to integrate results from different domains of computer science, computational science, and mathematics. We welcome simulation papers, either hard simulations using finite element or finite difference ...

• A numerical study on the hydrodynamic impact of device slenderness and array size in wave energy farms in realistic wave climates 

  Penalba M.; Touzón I.; Lopez-Mendia J.; Nava V. (Ocean Engineering, 2017-07-10)

  The future of wave energy converters lies in the design and realization of farms comprising of several devices, given the level of actual power flow for the individual devices and because of several operational issues. ...

• Layout Optimisation of Wave Energy Converter Arrays 

  Mercadé Ruiz P.; Nava V.; Topper M. B. R.; Ruiz Minguela P.; Ferri F.; Kofoed J. P. (Energies, 2017-08-24)

  This paper proposes an optimisation strategy for the layout design of wave energy converter (WEC) arrays. Optimal layouts are sought so as to maximise the absorbed power given a minimum q-factor, the minimum distance between ...

• Optimally refined isogeometric analysis 

  Garcia D.; Bartoň M.; Pardo D. (Procedia Computer Science, 2017-06)

  Performance of direct solvers strongly depends upon the employed discretization method. In particular, it is possible to improve the performance of solving Isogeometric Analysis (IGA) discretizations by introducing multiple ...

• Automatic fitting of conical envelopes to free-form surfaces for flank CNC machining 

  Bo P.; Bartoň M.; Pottmann H. (Computer Aided Design, 2017-10)

  We propose a new algorithm to detect patches of free-form surfaces that can be well approximated by envelopes of a rotational cone under a rigid body motion. These conical envelopes are a preferable choice from the ...

• Group-level progressive alterations in brain connectivity patterns revealed by diffusion-tensor brain networks across severity stages in Alzheimer's disease 

  Rasero J.; Alonso-Montes C.; Diez I.; Olabarrieta-Landa L.; Remaki L.; Escudero I.; Mateos B.; Bonifazi P.; Fernandez M.; Arango-Lasprilla; Stramaglia S.; Cortes J.M. (Frontiers in Aging Neuroscience, 2017-07-01)

  Alzheimer’s disease (AD) is a chronically progressive neurodegenerative disease highly correlated to aging. Whether AD originates by targeting a localized brain area and propagates to the rest of the brain across ...

• Towards HPC-Embedded Case Study: Kalray and Message-Passing on NoC 

  Valero-Lara P.; Krishnasamy E.; Jansson J. (Scalable Computing, 2017)

  Today one of the most important challenges in HPC is the development of computers with a low power consumption. In this context, recently, new embedded many-core systems have emerged. One of them is Kalray. Unlike other ...

• New Simplified Algorithm for the Multiple Rotating Frame Approach in Computational Fluid Dynamics 

  Remaki L.; Ramezani A.; Blanco J. M.; Garcia I. (Journal of Fluids Engineering, 2017-06-02)

  This paper deals with rotating effects simulation of steady flows in turbomachinery. To take into account the rotating nature of the flow, the frozen rotor approach is one of the widely used approaches. This technique, ...

• Necking in 2D incompressible polyconvex materials: theoretical framework and numerical simulations 

  Mora-Corral C.; Strugaru M. (Quarterly Journal of Mechanics and Applied Mathematics, 2017-06-15)

  We show examples of 2D incompressible isotropic homogeneous hyperelastic materials with a poly-convex stored-energy function that present necking. The construction of the stored-energy function of amaterial satisfying all ...

• Fusion-based variational image dehazing 

  Galdran A.; Vazquez-Corral J.; Pardo D.; Bertalmio M. (IEEE Signal Processing Letters, 2017-02-01)

  We propose a novel image-dehazing technique based on the minimization of two energy functionals and a fusion scheme to combine the output of both optimizations. The proposed fusion-based variational image-dehazing (FVID) ...

• Gaussian quadrature rules for $C^1$ quintic splines with uniform knot vectors 

  Bartoň M.; Ait-Haddou R.; Calo V. (Journal of Computational and Applied Mathematics, 2017-03-22)

  We provide explicit quadrature rules for spaces of $C^1$ quintic splines with uniform knot sequences over finite domains. The quadrature nodes and weights are derived via an explicit recursion that avoids numerical solvers. ...

• Towards optimal advection using stretch-maximizing stream surfaces 

  Bartoň M.; Kosinka J. (Computer Aided Geometric Design, 2017-03-01)

  We investigate a class of stream surfaces that expand in time as much as possible. Given a vector field, we look for seed curves that locally propagate in time in a stretch-maximizing manner, i.e., curves that infinitesimally ...

• Sensitivity study of borehole-to-surface and crosswell electromagnetic measurements acquired with energized steel casing to water displacement in hydrocarbon-bearing layers 

  Pardo D.; Torres-Verdín C.; Zhang Z. (Geophysics, 2008-12-31)

  We study the theoretical response of electromagnetically energized steel casing in the presence of subsurface variations of electrical resistivity. Casing is energized with a finite-size solenoid antenna located along the ...

• Energy-norm-based and goal-oriented automatic hp adaptivity for electromagnetics: Application to waveguide Discontinuities 

  Garcia-Castillo L.E.; Pardo D.; Demkowicz L.F. (IEEE Transactions on Microwave Theory and Techniques, 2008-12-31)

  The finite-element method (FEM) enables the use of adapted meshes. The simultaneous combination of h (local variations in element size) and p (local variations in the polynomial order of approximation) refinements, i.e., ...

• Rigorous numerics in floquet theory: Computing stable and unstable bundles of periodic orbits 

  Castelli R.; Lessard J.-P. (SIAM Journal on Applied Dynamical Systems, 2013-12-31)

  In this paper, a rigorous method to compute Floquet normal forms of fundamental matrix solutions of nonautonomous linear differential equations with periodic coefficients is introduced. The Floquet normal form of a fundamental ...

• Discrete nonnegativity for nonlinear cooperative parabolic PDE systems with non-monotone coupling 

  Faragó I.; Karátson J.; Korotov S. (Mathematics and Computers in Simulation, 2013-12-31)

  Discrete nonnegativity principles are established for finite element approximations of nonlinear parabolic PDE systems with mixed boundary conditions. Previous results of the authors are extended such that diagonal dominance ...

• Singular dynamics under a weak potential on a sphere 

  Castelli R.; Paparella F.; Portaluri A. (Nonlinear Differential Equations and Applications, 2013-12-31)

  We give a detailed analytical description of the global dynamics of a point mass moving on a sphere under the action of a logarithmic potential. We perform a McGehee-type blow-up in order to cope with the singularity of ...

• An IMEX scheme combined with Richardson extrapolation methods for some reaction-diffusion equations 

  Faragó I.; Izsák F.; Szabó T. (Idojaras, 2013-12-31)

  An implicit-explicit (IMEX) method is combined with some so-called Richardson extrapolation (RiEx) methods for the numerical solution of reaction-diffusion equations with pure Neumann boundary conditions. The results are ...

• Editors' preface for the topical issue "Numerical Methods for Large-Scale Scientific Computing, II" 

  Karátson J.; Korotov S.; Margenov S. (Central European Journal of Mathematics, 2013-12-31)

  [No abstract available]

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