Now showing items 130-149 of 170

    • Parallelizing the Kolmogorov-Fokker-Planck Equation 

      Gerardo-Giorda L.; Tran M.-B. (ESAIM M2AN: Mathematical Modelling and Numerical Analysis, 2015-12-31)
      We design two parallel schemes, based on Schwarz Waveform Relaxation (SWR) procedures, for the numerical solution of the Kolmogorov equation. The latter is a simplified version of the Fokker-Planck equation describing the ...
    • Particle Morphology 

      Mercado Y.R.; Akhmatskaya E.; Leiza J.R.; Asua J.M. (Chemistry and Technology of Emulsion Polymerisation: Second Edition, 2013-12-31)
      This chapter discusses the morphology of latex particles obtained mainly by (mini)emulsion polymerisation. It describes some applications of these particles, and discusses the factors that influence the particle morphology. ...
    • Patient-specific computational modeling of Cortical Spreading Depression via Diffusion Tensor Imaging 

      Kroos J.M.; Marinelli I.; Diez I.; Cortes J.M.; Stramaglia S.; Gerardo-Giorda L. (International Journal for Numerical Methods in Biomedical Engineering, 2016-06-29)
      Cortical Spreading Depression (CSD), a depolarization wave originat- ing in the visual cortex and traveling towards the frontal lobe, is com- monly accepted as a correlate of migraine visual aura. As of today, little is ...
    • Patient-specific modelling of cortical spreading depression applied to migraine studies 

      Kroos J.M. (2019-06-17)
      Migraine is a common neurological disorder and one-third of migraine patients suffer from migraine aura, a perceptual disturbance preceding the typically unilateral headache. Cortical spreading depression (CSD), a ...
    • Permanence and extinction for a nonautonomous SEIRS epidemic model 

      Kuniya T.; Nakata Y. (Applied Mathematics and Computation, 2012-12-31)
      In this paper, we study the long-time behavior of a nonautonomous SEIRS epidemic model. We obtain new sufficient conditions for the permanence (uniform persistence) and extinction of infectious population of the model. By ...
    • Permanence and global stability of a class of discrete epidemic models 

      Muroya Y.; Nakata Y.; Izzo G.; Vecchio A. (Nonlinear Analysis: Real World Applications, 2011-12-31)
      In this paper we investigate the permanence of a system and give a sufficient condition for the endemic equilibrium to be globally asymptotically stable, which are the remaining problems in our previous paper (G. Izzo, Y. ...
    • Pro-C congruence properties for groups of rooted tree automorphisms 

      Garrido A.; Uria-Albizuri J. (Archiv der Mathematik, 2018-11-21)
      We propose a generalisation of the congruence subgroup problem for groups acting on rooted trees. Instead of only comparing the profinite completion to that given by level stabilizers, we also compare pro-$\mathcal{C}$ ...
    • Probabilistic Modelling of Classical and Quantum Systems 

      Rusconi S. (2018-06-14)
      While probabilistic modelling has been widely used in the last decades, the quantitative prediction in stochastic modelling of real physical problems remains a great challenge and requires sophisticated mathematical models ...
    • Pseudospectral methods and numerical continuation for the analysis of structured population models 

      Sanchez Sanz J. (2016-06-07)
      In this thesis new numerical methods are presented for the analysis of models in population dynamics. The methods approximate equilibria and bifurcations in a certain class of so called structured population models. Chapter ...
    • Pseudospin lifetime in relaxed-shape armchair graphene nanoribbons due to in-plane phonon modes 

      Prabhakar S.; Melnik R.; Bonilla L. (Physical Review B - Condensed Matter and Materials Physics, 2016-01-01)
      We study the influence of ripple waves on the band structures of strained armchair graphene nanoribbons. We argue that the Zeeman pseudospin (p-spin) splitting energy induced by ripple waves might not be neglected for ...
    • Qualitative analysis of kinetic-based models for tumor-immune system interaction 

      Conte M.; Groppi M.; Spiga G. (Discrete and Continuous Dynamical Systems - Series B, 2018-08)
      A mathematical model, based on a mesoscopic approach, describing the competition between tumor cells and immune system in terms of kinetic integro-differential equations is presented. Four interacting populations are ...
    • Quiescence: A mechanism for escaping the effects of drug on cell populations 

      Alarcon T.; Jensen H.J. (Journal of the Royal Society Interface, 2011-12-31)
      We point out that a simple and generic strategy in order to lower the risk for extinction consists in developing a dormant stage in which the organism is unable to multiply but may die. The dormant organism is protected ...
    • Radiation of water waves by a submerged nearly circular plate 

      Farina L.; da Gama R.L.; Korotov S.; Ziebell J.S. (Journal of Computational and Applied Mathematics, 2016-01-01)
      A thin nearly circular plate is submerged below the free surface of deep water. The problem is reduced to a hypersingular integral equation over the surface of the plate which is conformally mapped onto the unit disc. The ...
    • An RBF-FD closest point method for solving PDEs on surfaces 

      Petras A.; Ling L.; Ruuth S.J. (Journal of Computational Physics, 2018)
      Partial differential equations (PDEs) on surfaces appear in many applications throughout the natural and applied sciences. The classical closest point method (Ruuth and Merriman, J. Comput. Phys. 227(3):1943-1961, ...
    • Reexamination of continuous fuzzy measurement on two-level systems 

      Sokolovski D.; Rusconi S.; Brouard S.; Akhmatskaya E. (PHYSICAL REVIEW A, 2017-04-10)
      Imposing restrictions on the Feynman paths of the monitored system has in the past been proposed as a universal model-free approach to continuous quantum measurements. Here we revisit this proposition and demonstrate that ...
    • Relative frequencies of constrained events in stochastic processes: An analytical approach 

      Rusconi S.; Akhmatskaya E.; Sokolovski D.; Ballard N.; de La Cal J.C. (Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, 2015-12-31)
      The stochastic simulation algorithm (SSA) and the corresponding Monte Carlo (MC) method are among the most common approaches for studying stochastic processes. They relies on knowledge of interevent probability density ...
    • Revealing the Mechanism of Sodium Diffusion in NaxFePO4 Using an Improved Force Field 

      Bonilla M.R.; Lozano A.; Escribano B.; Carrasco J.; Akhmatskaya E. (Journal of Physical Chemistry C, 2018-04-02)
      Olivine NaFePO4 is a promising cathode material for Na-ion batteries. Intermediate phases such as Na0.66FePO4 govern phase stability during intercalation-deintercalation processes, yet little is known about Na+ diffusion ...
    • Runaway electrification of friable self-replicating granular matter 

      Cartwright J.H.E.; Escribano B.; Grothe H.; Piro O.; Sainz Díaz C.I.; Tuval I. (Langmuir, 2013-12-31)
      We establish that the nonlinear dynamics of collisions between particles favors the charging of an insulating, friable, self-replicating granular material that undergoes nucleation, growth, and fission processes; we ...
    • SDE-driven modeling of phenotypically heterogeneous tumors: The influence of cancer cell stemness 

      Kroos J.M.; Stinner C.; Surulescu S.; Surulescu N. (Discrete and Continuous Dynamical Systems - Series B, 2019)
      We deduce cell population models describing the evolution of a tumor (possibly interacting with its environment of healthy cells) with the aid of differential equations. Thereby, different subpopulations of cancer cells ...
    • Shoaling of nonlinear steady waves: maximum height and angle of breaking 

      Romero S.; Farina L. (Conference Applications of Mathematics 2015, in honor of the birthday anniversaries of Ivo Babuska (90), Milan Prager (85), and Emil Vitasek (85) J. Brandts, S. Korotov, M. Krızek, K. Segeth, J. Sıstek, T. Vejchodsky (Eds.) Institute of Mathemat, 2015-12-31)
      A Fourier approximation method is used for modeling and simu- lation of fully nonlinear steady waves. The set of resulting nonlinear equations are solved by Newton’s method. The shoaling of waves is simulated based on ...