Now showing items 1-20 of 667

  • The 1 : √2 mode interaction and heteroclinic networks in Boussinesq convection 

    Podvigina, Olga; Ashwin, Peter (Elsevier, 2007)
    Methods of equivariant bifurcation theory are applied to Boussinesq convection in a plane layer with stress-free horizontal boundaries and an imposed square lattice periodicity in the horizontal directions. We consider ...
  • The 2012 Madeira dengue outbreak: epidemiological determinants and future epidemic potential 

    Lourenço, José; Recker, Mario (Public Library of Science, 2014-08)
    Dengue, a vector-borne viral disease of increasing global importance, is classically associated with tropical and sub-tropical regions around the world. Urbanisation, globalisation and climate trends, however, are facilitating ...
  • 2D and 3D polar plume analysis from the three vantage positions of STEREO/EUVI A, B, and SOHO/EIT 

    de Patoul, Judith; Inhester, Bernd; Feng, L; Wiegelmann, T (Springer Verlag, 2011-11-17)
    Polar plumes are seen as elongated objects starting at the solar polar regions. Here, we analyze these objects from a sequence of images taken simultaneously by the three spacecraft telescopes STEREO/EUVI A and B, and ...
  • 3D electron density distribution in the solar corona during solar minima: assessment for more realistic solar wind modelling 

    de Patoul, Judith; Foullon, Claire; Riley, Pete (American Astronomical Society, 2015-11-17)
    Knowledge of the electron density distribution in the solar corona put constraints on the magnetic field configurations for coronal modeling and on initial conditions for solar wind modeling. We work with polarized ...
  • Accelerated diffusion in the centre of a vortex 

    Bajer, Konrad; Bassom, Andrew P.; Gilbert, Andrew D. (Cambridge University Press, 2001)
    The spiral wind-up and diffusive decay of a passive scalar in circular streamlines is considered. An accelerated diffusion mechanism operates to destroy scalar fluctuations on a time scale of order P1/3 times the turn-over ...
  • Acceleration of one-dimensional mixing by discontinuous mappings 

    Ashwin, Peter; Nicol, Matthew; Kirkby, Norman (Elsevier, 2002)
    The paper considers a simple class of models for mixing of a passive tracer into a bulk material that is essentially one dimensional. We examine the relative rates of mixing due to diffusion, stretch and fold operations ...
  • Achieving population-level immunity to rabies in free-roaming dogs in Africa and Asia 

    Morters, Michelle K.; McKinley, Trevelyan J.; Horton, Daniel L.; Cleaveland, Sarah; Schoeman, Johan P.; Restif, Olivier; Whay, Helen R.; Goddard, Amelia; Fooks, Anthony R.; Damriyasa, I. Made; Wood, James L. N. (Public Library of Science, 2014-11)
    Canine rabies can be effectively controlled by vaccination with readily available, high-quality vaccines. These vaccines should provide protection from challenge in healthy dogs, for the claimed period, for duration of ...
  • Adaptive tracking control of a virtual player in the mirror game 

    Zhai, Chao; Alderisio, Francesco; Tsaneva-Atanasova, Krasimira; Di Bernardo, Mario (IEEE, 2014)
    The coordination of interpersonal rhythmic movements is of great significance due to its potential relevance to human motor rehabilitation. In this paper we consider the problem of designing a controller able to drive a ...
  • Aerosol direct radiative effect of smoke over clouds over the southeast Atlantic Ocean from 2006 to 2009 

    de Graaf, M; Bellouin, N; Tilstra, LG; Haywood, J; Stammes, P (American Geophysical Union, 2014-11-16)
    The aerosol direct radiative effect (DRE) of African smoke was analyzed in cloud scenes over the southeast Atlantic Ocean, using Scanning Imaging Absorption Spectrometer for Atmospheric Chartography (SCIAMACHY) satellite ...
  • Age-dependent patterns of bovine tuberculosis in cattle. 

    Brooks-Pollock, Ellen; Conlan, Andrew J. K.; Mitchell, Andrew P.; Blackwell, R; McKinley, Trevelyan J.; Wood, James L. N. (BioMed Central, 2013-10-16)
    Bovine tuberculosis (BTB) is an important livestock disease, seriously impacting cattle industries in both industrialised and pre-industrialised countries. Like TB in other mammals, infection is life long and, if undiagnosed, ...
  • Almost sure convergence of maxima for chaotic dynamical systems 

    Holland, Mark P.; Nicol, Matthew; Török, János (Cornell University Library, 2016-03-21)
    Suppose (f,X,ν) is a measure preserving dynamical system and ϕ:X→R is an observable with some degree of regularity. We investigate the maximum process M n :=max{X 1 ,…,X n } , where X i =ϕ∘f i is a time series of observations ...
  • Altered intrinsic excitability of hippocampal CA1 pyramidal neurons in aged PDAPP mice 

    Tamagnini, F; Novelia, J; Kerrigan, TL; Brown, JT; Tsaneva-Atanasova, Krasimira; Randall, AD (Frontiers, 2015-10-14)
    Amyloidopathy involves the accumulation of insoluble amyloid b (Ab) species in the brain’s parenchyma and is a key histopathological hallmark of Alzheimer’s disease (AD). Work on transgenic mice that overexpress Ab ...
  • Altered intrinsic pyramidal neuron properties and pathway-specific synaptic dysfunction underlie aberrant hippocampal network function in a mouse model of Tauopathy. 

    Booth, Clair A.; Witton, J; Nowacki, J; Tsaneva-Atanasova, Krasimira; Jones, MW; Randall, AD; Brown, JT (Society for Neuroscience -, 2016-01-13)
    The formation and deposition of tau protein aggregates is proposed to contribute to cognitive impairments in dementia by disrupting neuronal function in brain regions, including the hippocampus. We used a battery of in ...
  • Alternative stable scroll waves and conversion of autowave turbulence 

    Foulkes, A. J.; Barkley, D.; Biktashev, V. N.; Biktasheva, I. V. (American Institute of Physics, 2010)
    Rotating spiral and scroll waves (vortices) are investigated in the FitzHugh-Nagumo model of excitable media. The focus is on a parameter region in which there exists bistability between alternative stable vortices with ...
  • Amplified mid-latitude planetary waves favour particular regional weather extremes 

    Screen, James A.; Simmonds, Ian (Nature Publishing Group, 2014)
    There has been an ostensibly large number of extreme weather events in the Northern Hemisphere mid-latitudes during the past decade [1]. An open question that is critically important for scientists and policy makers is ...
  • Analysis of anchor-size effects on pinned scroll waves and measurement of filament rigidity. 

    Nakouzi, E; Jiménez, ZA; Biktashev, V. N.; Steinbock, O (American Physical Society, 2014-04-02)
    Inert, spherical heterogeneities can pin three-dimensional scroll waves in the excitable Belousov-Zhabotinsky reaction. Three pinning sites cause initially circular rotation backbones to approach equilateral triangles. The ...
  • An analytical approach to initiation of propagating fronts 

    Idris, I.; Biktashev, V. N. (American Physical Society, 2008)
    We consider the problem of initiation of a propagating wave in a one-dimensional excitable fibre. In the Zeldovich-Frank-Kamenetsky equation, a.k.a. Nagumo equation, the key role is played by the "critical nucleus'' solution ...
  • An Analytical Model for On-chip Interconnects in Multimedia Embedded Systems 

    Wu, Yulei; Min, Geyong; Zhu, Dakai; Yang, Laurence T. (Association for Computing Machinery (ACM), 2013)
    The traffic pattern has significant impact on the performance of network-on-chip. Many recent studies have shown that multimedia applications can be supported in on-chip interconnects. Driven by the motivation of evaluating ...
  • Analytically Solvable Asymptotic Model of Atrial Excitability 

    Simitev, R. D.; Biktashev, V. N. (2009-05-25)
    We report a three-variable simplified model of excitation fronts in human atrial tissue. The model is derived by novel asymptotic techniques \new{from the biophysically realistic model of Courtemanche et al (1998) in ...
  • Anisotropic properties of riddled basins 

    Ashwin, Peter; Breakspear, Michael (Elsevier, 2001)
    We consider some general properties of chaotic attractors with riddled basins of attraction (basins with positive measure but open dense complements) in dynamical systems with symmetries. We investigate how a basin of ...