Now showing items 21-40 of 714

    • Wildland fire propagation modelling 

      Egorova V. N.; Pagnini G.; Trucchia A. (MODELLING FOR ENGINEERING AND HUMAN BEHAVIOUR 2017 Extended abstract, 2017-12)
      Wildfire propagation modelling is a challenging problem due to its complex multi-scale multi-physics nature. This process can be described by a reaction- diffusion equation based on the energy balance principle. Alternative ...
    • Hierarchical modelling of patient-reported outcomes data based on the beta-binomial distribution 

      Najera-Zuloaga J. (2017-12-13)
      The beta-binomial distribution does not belong to the exponential family and, hence classical regression techniques cannot be used when dealing with outcomes following the mentioned distribution. In this thesis we propose ...
    • Front Curvature Evolution and Hydrodynamics Instabilities 

      Pagnini G.; Trucchia A. (Proceedings/Extended Abstract Book (6 pages) of the XXXX Meeting of the Italian Section of the Combustion Institute, Rome, Italy, 2017-06-07)
      It is known that hydrodynamic instabilities in turbulent premixed combustion are described by the Michelson-Sivashinsky (MS) equation. A model of the flame front propagation based on the G-equation and on stochastic ...
    • Improved A1 − A∞ and related estimates for commutators of rough singular integrals 

      Rivera-Ríos I.P. (Proceedings of the Edinburgh Mathematical Society, 2017)
      An $A_1-A_\infty$ estimate improving a previous result in [22] for $[b, T_\Omega]$ with $\Omega\in L^\infty(S^{n-1})$ and $b\in BMO$ is obtained. Also a new result in terms of the $A_\infty$ constant and the one ...
    • Topology of Spaces of Valuations and Geometry of Singularities 

      de Felipe Ana B. (Transactions of the AMS - American Mathematical Society, 2017-11-11)
      Given an algebraic variety X defined over an algebraically closed field, we study the space RZ(X,x) consisting of all the valuations of the function field of X which are centered in a closed point x of X. We concentrate ...
    • A system for airport weather forecasting based on circular regression trees 

      Rozas-Larrondo P.; Inza I.; Lozano J.A. (Environmental Modelling & Software, 2017-11-01)
      This paper describes a suite of tools and a model for improving the accuracy of airport weather forecasts produced by numerical weather prediction (NWP) products, by learning from the relationships between previously ...
    • Learning to classify software defects from crowds: a novel approach 

      Hernández-González J.; Rodríguez D.; Inza I.; Rachel H.; Lozano J.A. (Applied Soft Computing, 2017-11-01)
      In software engineering, associating each reported defect with a cate- gory allows, among many other things, for the appropriate allocation of resources. Although this classification task can be automated using stan- dard ...
    • A proof of the integral identity conjecture, II 

      Thuong L.Q. (Comptes Rendus Mathematique, 2017-10-31)
      In this note, using Cluckers-Loeser’s theory of motivic integration, we prove the integral identity conjecture with framework a localized Grothendieck ring of varieties over an arbitrary base field of characteristic zero.
    • Correcting for spatial heterogeneity in plant breeding experiments with P-splines 

      Rodríguez-Álvarez M.X.; Boer M.P.; van Eeuwijk F.A.; Eilers P.H.C. (Spatial Statistics, 2017-10-27)
      An important aim of the analysis of agricultural field experiments is to obtain good predictions for genotypic performance, by correcting for spatial effects. In practice these corrections turn out to be complicated, since ...
    • On a hyperbolic system arising in liquid crystal modelling 

      Fereisl E.; Rocca E.; Schimperna G.; Zarnescu A. (Journal of Hyperbolic Differential Equations, 2017-11)
      We consider a model of liquid crystals, based on a nonlinear hyperbolic system of differential equations, that represents an inviscid version of the model proposed by Qian and Sheng. A new concept of dissipative solution ...
    • Sphere-valued harmonic maps with surface energy and the K13 problem 

      Day S.; Zarnescu A. (Advances in the Calculus of Variations, 2017-11)
      We consider an energy functional motivated by the celebrated K13 problem in the Oseen-Frank theory of nematic liquid crystals. It is defined for sphere-valued functions and appears as the usual Dirichlet energy with an ...
    • Global well-posedness and twist-wave solutions for the inertial Qian-Sheng model of liquid crystals 

      de Anna F.; Zarnescu A. (Journal of Differential Equations, 2017-10-02)
      We consider the inertial Qian-Sheng model of liquid crystals which couples a hyperbolic-type equation involving a second-order material derivative with a forced incompressible Navier-Stokes system. We study the energy law ...
    • Early classification of time series by simultaneously optimizing the accuracy and earliness 

      Mori U.; Mendiburu A.; Dasgupta S.; Lozano J.A. (IEEE Transactions on Neural Networks and Learning Systems, 2017-10)
      The problem of early classi cation of time series appears naturally in contexts where the data, of temporal nature, is collected over time, and early class predictions are interesting or even required. The objective is to ...
    • Klein's Paradox and the Relativistic $\delta$-shell Interaction in $\mathbb{R}^3$ 

      Mas A; Pizzichillo F. (Analysis & PDE, 2017-11)
      Under certain hypothesis of smallness of the regular potential $\mathbf{V}$, we prove that the Dirac operator in $\mathbb{R}^3$ coupled with a suitable re-scaling of $\mathbf{V}$, converges in the strong resolvent sense ...
    • Asymptotic behaviour for fractional diffusion-convection equations 

      Ignat L.; Stan D. (2017-10)
      We consider a convection-diffusion model with linear fractional diffusion in the sub-critical range. We prove that the large time asymptotic behavior of the solution is given by the unique entropy solution of the convective ...
    • Existence of weak solutions for a general porous medium equation with nonlocal pressure 

      Stan D.; del Teso F.; Vázquez JL. (submitted, 2017-10)
      We study the general nonlinear diffusion equation $u_t=\nabla\cdot (u^{m-1}\nabla (-\Delta)^{-s}u)$ that describes a flow through a porous medium which is driven by a nonlocal pressure. We consider constant parameters ...
    • A space-fractional Monodomain model for cardiac electrophysiology combining anisotropy and heterogeneity on realistic geometries 

      Cusimano N.; Gerardo-Giorda L. (2017-10-04)
      Classical models of electrophysiology do not typically account for the effects of high structural heterogeneity in the spatio-temporal description of excitation waves propagation. We consider a modification of the Monodomain ...
    • Three-dimensional coarsening dynamics of a conserved, nematic liquid crystal-isotropic fluid mixture 

      Nós R.L.; Roma A. M.; Garcia-Cervera C.J.; Ceniceros H.D. (Journal of Non-Newtonian Fluid Mechanics, 2017-09)
      We present a numerical investigation of the three-dimensional coarsening dynamics of a nematic liquid crystal-isotropic fluid mixture using a conserved phase field model. The model is a coupled system for a generalized ...
    • The Experiment Data Depot: A Web-Based Software Tool for Biological Experimental Data Storage, Sharing, and Visualization 

      Morrell W.C.; Birkel G.W.; Forrer M.; Lopez T.; Backman T.W.H.; Dussault M.; Petzold C.J.; Baidoo E.E.K.; Costello Z.; Ando D.; Alonso-Gutierrez J.; George K.W.; Mukhopadhyay A.; Vaino I.; Keasling J.D.; Adams P.D.; Hillson N.J.; García Martín H. (ACS Synthetic Biology, 2017-09-30)
      Although recent advances in synthetic biology allow us to produce biological designs more efficiently than ever, our ability to predict the end result of these designs is still nascent. Predictive models require large ...
    • Goal-Oriented Adaptivity using Unconventional Error Representations 

      Darrigrand V. (2017-09)
      In Goal-Oriented Adaptivity (GOA), the error in a Quantity of Interest (QoI) is represented using global error functions of the direct and adjoint problems. This error representation is subsequently bounded above by ...