Now showing items 15-34 of 708

  • 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 ...
  • Anisotropic small-scale constraints on energy in rotating stratified turbulence 

    Kurien, Susan; Wingate, Beth; Taylor, Mark (European Physical Society, 2008-10)
    Rapidly rotating, stably stratified three-dimensional inviscid flows conserve both energy and potential enstrophy. We show that in such flows, the forward cascade of potential enstrophy imposes anisotropic constraints on ...
  • Anthropogenic perturbation of the carbon fluxes from land to ocean 

    Regnier, P; Friedlingstein, P; Ciais, P; Mackenzie, FT; Gruber, N; Janssens, IA; Laruelle, GG; Lauerwald, R; Luyssaert, S; Andersson, AJ; Arndt, S; Arnosti, C; Borges, AV; Dale, AW; Gallego-Sala, Angela V.; Goddéris, Y; Goossens, N; Hartmann, J; Heinze, C; Ilyina, T; Joos, F; Larowe, DE; Leifeld, J; Meysman, FJR; Munhoven, G; Raymond, PA; Spahni, R; Suntharalingam, P; Thullner, M (Nature Publishing Group, 2013-06-09)
    A substantial amount of the atmospheric carbon taken up on land through photosynthesis and chemical weathering is transported laterally along the aquatic continuum from upland terrestrial ecosystems to the ocean. So far, ...
  • Anti-phase Signature of Flare Generated Transverse Loop Oscillation 

    White, R.S.; Verwichte, E.; Foullon, Claire (American Astronomical Society / IOP Publishing, 2013)
    Transverse loop oscillations observed by the Atmospheric Imaging Assembly instrument on the Solar Dynamics Observatory spacecraft are studied after an impulsive solar flare eruption on 2012 May 8. We have found that a ...
  • The antigenic evolution of influenza: drift or thrift? 

    Wikramaratna, Paul S.; Sandeman, Michi; Recker, Mario; Gupta, Sunetra (The Royal Society, 2013-03-19)
    It is commonly assumed that antibody responses against the influenza virus are polarized in the following manner: strong antibody responses are directed at highly variable antigenic epitopes, which consequently undergo ...
  • The antigenic switching network of Plasmodium falciparum and its implications for the immuno-epidemiology of malaria 

    Noble, Robert; Christodoulou, Zóe; Kyes, Sue; Pinches, Robert; Newbold, Chris I.; Recker, Mario (eLife Sciences Publications, 2013)
    Antigenic variation in the human malaria parasite Plasmodium falciparum involves sequential and mutually exclusive expression of members of the var multi-gene family and appears to follow a non-random pattern. In this ...
  • Antigenic variation in Plasmodium falciparum malaria involves a highly structured switching pattern 

    Recker, M; Buckee, CO; Serazin, A; Kyes, S; Pinches, R; Christodoulou, Z; Springer, AL; Gupta, S; Newbold, CI (Public Library of Science, 2011-03-03)
    Many pathogenic bacteria, fungi, and protozoa achieve chronic infection through an immune evasion strategy known as antigenic variation. In the human malaria parasite Plasmodium falciparum, this involves transcriptional ...
  • AppTCP: The design and evaluation of application-based TCP for e-VLBI in fast long distance networks 

    Wang, G; Wu, Y; Dou, K; Ren, Y; Li, J (Elsevier, 2014-10)
    Electric Very Long Baseline Interferometry (e-VLBI) is a typical astronomical interferometry used in radio astronomy. It allows observations of an object that are made simultaneously by many radio telescopes to be combined, ...
  • Arctic amplification decreases temperature variance in Northern mid- to high-latitudes 

    Screen, James A. (Nature Publishing Group, 2014)
    Changes in climate variability are arguably more important for society and ecosystems than changes in mean climate, especially if they translate into altered extremes [1, 2, 3]. There is a common perception and growing ...
  • The Arctic predictability and prediction on seasonal-to-interannual timescales (APPOSITE) data set version 1 

    Day, JJ; Tietsche, S; Collins, M; Goessling, HF; Guemas, V; Guillory, A; Hurlin, WJ; Ishii, M; Keeley, SPE; Matei, D; Msadek, R; Sigmond, M; Tatebe, H; Hawkins, E (Copernicus Publications on behalf of the European Geosciences Union., 2016-06-29)
    Recent decades have seen significant developments in seasonal-to-interannual timescale climate prediction capabilities. However, until recently the potential of such systems to predict Arctic climate had not been assessed. ...
  • Are changes in global precipitation constrained by the tropospheric energy budget? 

    Lambert, F. Hugo; Allen, Myles R. (American Meteorological Society, 2009)
    A tropospheric energy budget argument is used to analyze twentieth-century precipitation changes. It is found that global and ocean-mean general circulation model (GCM) precipitation changes can be understood as being due ...
  • Are large submarine landslides temporally random or do uncertainties in available age constraints make it impossible to tell? 

    Pope, EL; Talling, PJ; Urlaub, M; Hunt, JE; Clare, MA; Challenor, Peter G. (Elsevier, 2015-07-29)
    © 2015. Large (>1km3) submarine landslides can potentially generate very destructive tsunamis and damage expensive sea floor infrastructure. It is therefore important to understand their frequency and triggers, and whether ...
  • Assessing risk profiles for Salmonella serotypes in breeding pig operations in Portugal using a Bayesian hierarchical model 

    Correia-Gomes, C; Economou, T; Mendonça, D; Vieira-Pinto, M; Niza-Ribeiro, J (BioMed Central, 2012-11-21)
    BACKGROUND: The EU Regulation No 2160/2003 imposes a reduction in the prevalence of Salmonella in pigs. The efficiency of control programmes for Salmonella in pigs, reported among the EU Member States, varies and definitive ...
  • Assessing rotation-invariant feature classification for automated wildebeest population counts 

    Torney, CJ; Dobson, AP; Borner, F; Lloyd-Jones, DJ; Moyer, D; Maliti, HT; Mwita, M; Fredrick, H; Borner, M; Hopcraft, JG (Public Library of Science, 2016-05-26)
    Accurate and on-demand animal population counts are the holy grail for wildlife conservation organizations throughout the world because they enable fast and responsive adaptive management policies. While the collection of ...