Now showing items 136-155 of 164

    • 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 ...
    • 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 ...
    • Spectral analysis of a block-triangular preconditioner for the bidomain system in electrocardiology 

      Gerardo-Giorda L.; Mirabella L. (Electronic Transactions on Numerical Analysis, 2012-12-31)
      In this paper we analyze in detail the spectral properties of the block-triangular preconditioner introduced by Gerardo-Giorda et al. [J. Comput. Phys., 228 (2009), pp. 3625-3639] for the Bidomain system in non-symmetric ...
    • Spin-orbit interaction in three-dimensionally bounded semiconductor nanostructures 

      Takhtamirov E.; Melnik R. (New Journal of Physics, 2010-12-31)
      The structural inversion asymmetry-induced spin-orbit interaction of conduction band electrons in zinc-blende and wurtzite semiconductor structures is analysed allowing for a three-dimensional (3D) character of the external ...
    • Stability analysis of a renewal equation for cell population dynamics with quiescence 

      Alarcon T.; Getto P.; Nakata Y. (SIAM Journal on Applied Mathematics, 2014-12-31)
      We propose a model to analyze the dynamics of interacting proliferating and quiescent cell populations. The model includes age dependence of cell division, transitions between the two subpopulations, and regulation of the ...
    • Stability analysis of delayed SIR epidemic models with a class of nonlinear incidence rates 

      Enatsu Y.; Messina E.; Muroya Y.; Nakata Y.; Russo E.; Vecchio A. (Applied Mathematics and Computation, 2012-12-31)
      We analyze stability of equilibria for a delayed SIR epidemic model, in which population growth is subject to logistic growth in absence of disease, with a nonlinear incidence rate satisfying suitable monotonicity conditions. ...
    • Stability analysis of multi-compartment models for cell production systems 

      Nakata Y.; Getto P.; Marciniak-Czochra A.; Alarcon T. (Journal of Biological Dynamics, 2012-12-31)
      We study two-and three-compartment models of a hierarchical cell production system with cell division regulated by the level of mature cells. We investigate the structure of equilibria with respect to parameters as well ...
    • Stress induced polarization switching and coupled hysteretic dynamics in ferroelectric materials 

      Wang L.; Melnik R.; Lv F. (Frontiers of Mechanical Engineering, 2011-12-31)
      The dynamic responses of ferroelectric materials upon external mechanical and electrical stimulations are inherently nonlinear and coupled. In the current paper, a macroscopic differential model is constructed for the ...
    • Structuring targeted surveillance for monitoring disease emergence by mapping observational data onto ecological process 

      Gerardo-Giorda L.; Puggioni G.; Rudd R.J.; Waller L.A.; Real L.A. (Journal of the Royal Society Interface, 2013-12-31)
      An efficient surveillance system is a crucial factor in identifying, monitoring and tackling outbreaks of infectious diseases. Scarcity of data and limited amounts of economic resources require a targeted effort from public ...
    • 'Superluminal paradox' in wave packet propagation and its quantum mechanical resolution 

      Sokolovski D.; Akhmatskaya E. (Annals of Physics, 2013-12-31)
      We analyse in detail the reshaping mechanism leading to apparently 'superluminal' advancement of a wave packet traversing a classically forbidden region. In the coordinate representation, a barrier is shown to act as an ...
    • Synthesis of Monodisperse Spherical Nanocrystals 

      Cregan V.; Bacsa R.; Calvo Schwarzwälder M.; Fernández-Pendás M.; Florio B.; Marquina A.; Moyles I.; Myers T.; Ribera Ponsa H.; Rusconi S.; Serna S. (2016-01-29)
      Nanoparticles, small units of matter with dimensions in the range 1-100 nm, exhibit many advantageous size-dependent magnetic, electrical, chemical and optical prop- erties, which are not observed at the microscale or ...
    • Temporal excitation patterns on the cerebral cortex as a result of migraine modeling 

      Kroos J.M.; Diez I.; Cortes J.M.; Stramaglia S.; Gerardo-Giorda L. (Springer Proceedings in Physics, 2016-06-29)
      The complex, highly individual, geometry of the cerebral cortex in humans presents a major challenge in studying the spreading of spontaneous neuronal activity. Recent computational advances [1] allow to simulate the ...
    • The airfoil equation on near disjoint intervals: Approximate models and polynomial solutions 

      Farina L.; Ferreira M.R.S.; Peron V. (Journal of Computational and Applied Mathematics, 2016-01-01)
      The airfoil equation is considered over two disjoint intervals. Assuming the distance between the intervals is small an approximate solution is found and relationships between this approximation and the solution of the ...