Now showing items 43-62 of 435

  • Bounds on the dynamics of sink populations with noisy immigration 

    Eager, Eric Alan; Guiver, Chris; Hodgson, David J.; Rebarber, Richard; Stott, Iain; Townley, Stuart (Elsevier, 2014)
    Sink populations are doomed to decline to extinction in the absence of immigration. The dynamics of sink populations are not easily modelled using the standard framework of per capita rates of immigration, because numbers ...
  • Broad range of 2050 warming from an observationally constrained large climate model ensemble 

    Rowlands, Daniel J.; Frame, David J.; Ackerley, Duncan; Aina, Tolu; Booth, Ben B.B.; Christensen, Carl; Collins, Matthew; Faull, Nicholas; Forest, Chris E.; Grandey, Benjamin S.; Gryspeerdt, Edward; Highwood, Eleanor J.; Ingram, William J.; Knight, Sylvia; Lopez, Ana; Massey, Neil; McNamara, Frances; Meinshausen, Nicolai; Piani, Claudio; Rosier, Suzanne M.; Sanderson, Benjamin M.; Smith, Leonard A.; Stone, Daithi A.; hurston, Milo; Yamazaki, Kuniko; Yamazak, Y. Hiro; Allen, Myles R. (Nature Publishing Group, 2012)
    Incomplete understanding of three aspects of the climate system—equilibrium climate sensitivity, rate of ocean heat uptake and historical aerosol forcing—and the physical processes underlying them lead to uncertainties in ...
  • BSim: an agent-based tool for modeling bacterial populations in systems and synthetic biology. 

    Gorochowski, TE; Matyjaszkiewicz, Antoni; Todd, T; Oak, N; Kowalska, K; Reid, S; Tsaneva-Atanasova, Krasimira; Savery, NJ; Grierson, CS; di Bernardo, M (Public Library of Science (PLoS), 2012)
    Large-scale collective behaviors such as synchronization and coordination spontaneously arise in many bacterial populations. With systems biology attempting to understand these phenomena, and synthetic biology opening up ...
  • Buckling of scroll waves 

    Dierckx, H.; Verschelde, H.; Selsil, O.; Biktashev, V. N. (American Physical Society, 2012)
    A scroll wave in a sufficiently thin layer of an excitable medium with negative filament tension can be stable nevertheless due to filament rigidity. Above a certain critical thickness of the medium, such scroll wave will ...
  • The Build-up to Eruptive Solar Events Viewed as the Development of Chiral Systems 

    Martin, Sara F.; Panasenco, Olga; Berger, M.A.; Engvold, Oddbjorn; Lin, Yong; Pevtsov, Alexei A.; Srivastava, Nandita (Astronomical Society of the Pacific, 2012)
    When we examine the chirality or observed handedness of the chromospheric and coronal structures involved in the long-term build-up to eruptive events, we find that they evolve in very specific ways to form two and only ...
  • A Ca2+-based computational model for NMDA receptor-dependent synaptic plasticity at individual post-synaptic spines in the Hippocampus. 

    Rackham, OJ; Tsaneva-Atanasova, Krasimira; Ganesh, A; Mellor, JR (Frontiers, 2010)
    Associative synaptic plasticity is synapse specific and requires coincident activity in pre-synaptic and post-synaptic neurons to activate NMDA receptors (NMDARs). The resultant Ca(2+) influx is the critical trigger for ...
  • Calcium-Induced Calcium Release during Action Potential Firing in Developing Inner Hair Cells 

    Iosub, Radu; Avitabile, Daniele; Grant, Lisa; Tsaneva-Atanasova, Krasimira; Kennedy, Helen J. (Biophysical Society / Elsevier, 2015)
    In the mature auditory system, inner hair cells (IHCs) convert sound-induced vibrations into electrical signals that are relayed to the central nervous system via auditory afferents. Before the cochlea can respond to normal ...
  • The carbon cycle response to ENSO: a coupled climate–carbon cycle model study 

    Jones, Chris D.; Collins, Matthew; Cox, Peter M.; Spall, Steven A. (American Meteorological Society, 2001)
    There is significant interannual variability in the atmospheric concentration of carbon dioxide (CO2) even when the effect of anthropogenic sources has been accounted for. This variability is well correlated with the El ...
  • A case study of the radiative forcing of persistent contrails evolving into contrail-induced cirrus 

    Haywood, James M.; Allan, Richard P.; Bornemann, Jorge; Forster, Piers M.; Francis, Peter N.; Milton, Sean; Radel, Gaby; Rap, Alexandru; Shine, Keith P.; Thorpe, Robert (American Geophysical Union (AGU), 2009)
    [1] The radiative forcing due to a distinct pattern of persistent contrails that form into contrail-induced cirrus near and over the UK is investigated in detail for a single case study during March 2009. The development ...
  • Caution needed when linking weather extremes to amplified planetary waves 

    Screen, James A.; Simmonds, Ian (National Academy of Sciences, 2013)
  • The central role of diminishing sea ice in recent Arctic temperature amplification 

    Screen, James A.; Simmonds, Ian (Nature Publishing Group, 2010)
    The rise in Arctic near-surface air temperatures has been almost twice as large as the global average in recent decades-a feature known as 'Arctic amplification'. Increased concentrations of atmospheric greenhouse gases ...
  • Chaos in symmetric phase oscillator networks 

    Bick, Christian; Timme, Marc; Paulikat, Danilo; Rathlev, Dirk; Ashwin, Peter (American Physical Society, 2011)
    Phase-coupled oscillators serve as paradigmatic models of networks of weakly interacting oscillatory units in physics and biology. The order parameter which quantifies synchronization so far has been found to be chaotic ...
  • Chaotic Weak Chimeras and their Persistence in Coupled Populations of Phase Oscillators 

    Bick, Christian; Ashwin, Peter (arXiv.org, 2015-09-29)
    Nontrivial collective behavior may emerge from the interactive dynamics of many oscillatory units. Chimera states are chaotic patterns of spatially localized coherent and incoherent oscillations. The recently-introduced ...
  • Characteristic matrices for linear periodic delay differential equations 

    Sieber, J.; Szalai, R. (2011)
    Szalai, Stépán, and Hogan [SIAM J. Sci. Comput., 28 (2006), pp. 1301–1317] gave a general construction for characteristic matrices for systems of linear delay differential equations with periodic coefficients. First, we ...
  • Chimera states in networks of phase oscillators: the case of two small populations 

    Panaggio, Mark J.; Abrams, Daniel M.; Ashwin, Peter; Laing, Carlo R. (Arxiv.org, 2015-08-12)
    Chimera states are dynamical patterns in networks of coupled oscillators in which regions of synchronous and asynchronous oscillation coexist. Although these states are typically observed in large ensembles of oscillators ...
  • Classification of robust heteroclinic cycles for vector fields in R3 with symmetry 

    Hawker, David; Ashwin, Peter (Institute of Physics, 2005)
    We consider a classification of robust heteroclinic cycles in the positive octant of R3 under the action of the symmetry group (Z2)3. We introduce a coding system to represent different classes up to a topological equivalence, ...
  • Classification of wave regimes in excitable systems with linear cross diffusion 

    Tsyganov, M. A.; Biktashev, V. N. (American Physical Society, 2014)
    We consider principal properties of various wave regimes in two selected excitable systems with linear cross diffusion in one spatial dimension observed at different parameter values. This includes fixed-shape propagating ...
  • Climate impacts of geoengineering marine stratocumulus clouds 

    Jones, Andy; Haywood, James M.; Boucher, Olivier (American Geophysical Union (AGU), 2009)
    [1] Theoretical potential geoengineering solutions to the global warming problem have recently been proposed. Here, we present an idealized study of the climate response to deliberately seeding large-scale stratocumulus ...
  • Climate impacts of the southern annular mode simulated by the CMIP3 models 

    Karpechko, Alexey Yu; Gillett, Nathan P.; Marshall, Gareth J.; Screen, James A. (American Meteorological Society, 2009)
    The southern annular mode (SAM) has a well-established impact on climate in the Southern Hemisphere. The strongest response in surface air temperature (SAT) is observed in the Antarctic, but the SAM’s area of influence ...
  • Climate predictions: the influence of nonlinearity and randomness 

    Thompson, J.M.; Sieber, J. (Royal Society, 2012)
    The current threat of global warming and the public demand for confident projections of climate change pose the ultimate challenge to science: predicting the future behaviour of a system of such overwhelming complexity as ...