Now showing items 116-135 of 164

    • On a generalization of the global attractivity for a periodically forced Pielou's equation 

      Ishihara K.; Nakata Y. (Journal of Difference Equations and Applications, 2012-12-31)
      In this paper, we study the global attractivity for a class of periodic difference equation with delay which has a generalized form of Pielou's difference equation. The global dynamics of the equation is characterized by ...
    • On the Analysis of Trajectory-Based Search Algorithms: When is it Beneficial to Reject Improvements? 

      Nallaperuma S.; Oliveto P. S.; Pérez Heredia J.; Sudholt D. (Algorithmica, 2018)
      We investigate popular trajectory-based algorithms inspired by biology and physics to answer a question of general significance: when is it beneficial to reject improvements? A distinguishing factor of SSWM (Strong Selection ...
    • On the global stability of a delayed epidemic model with transport-related infection 

      Nakata Y. (Nonlinear Analysis: Real World Applications, 2011-12-31)
      We study the global dynamics of a time delayed epidemic model proposed by Liu et al. (2008) [J. Liu, J. Wu, Y. Zhou, Modeling disease spread via transport-related infection by a delay differential equation, Rocky Mountain ...
    • On the global stability of an SIRS epidemic model with distributed delays 

      Nakata Y.; Enatsu Y.; Muroya Y. (Discrete and Continuous Dynamical Systems- Series A, 2011-12-31)
      In this paper, we establish the global asymptotic stability of an endemic equilibrium for an SIRS epidemic model with distributed time delays. It is shown that the global stability holds for any rate of immunity loss, if ...
    • On the Perturbation Methods for Vibration Analysis of Linear Time-Varying Systems 

      Yang X.-D.; Liu M.; Zhang W.; Qian Y.-J.; Melnik R. (International Journal of Applied Mechanics, 2016-01-01)
      Some perturbation methods in the studying vibrations of the linear time-varying (LTV) system are discussed. Three classical perturbation methods, namely, averaging method, harmonic balance method, and multiple scales method ...
    • Optimized schwarz methods and model adaptivity in electrocardiology simulations 

      Gerardo-Giorda L.; Mirabella L.; Perego M.; Veneziani A. (Lecture Notes in Computational Science and Engineering, 2014-12-31)
      [No abstract available]
    • Optimized schwarz methods for the bidomain system in electrocardiology 

      Gerardo-Giorda L.; Perego M. (Mathematical Modelling and Numerical Analysis, 2013-12-31)
      The propagation of the action potential in the heart chambers is accurately described by the Bidomain model, which is commonly accepted and used in the specialistic literature. However, its mathematical structure of a ...
    • Optimized Schwarz Methods in the Stokes-Darcy Coupling 

      Discacciati M.; Gerardo-Giorda L. (IMA J. Num. Analysis 38 (4), 2018-10-16)
      This article studies optimized Schwarz methods for the Stokes–Darcy problem. Robin transmission conditions are introduced, and the coupled problem is reduced to a suitable interface system that can be solved using Krylov ...
    • 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 ...