Now showing items 1066-1085 of 1143

  • Tangencies in invariant disc packings for certain planar piecewise isometries are rare 

    Ashwin, Peter; Fu, Xin-Chu (Taylor & Francis, 2001)
    For planar piecewise isometries (PWIs) (two-dimensional maps that restrict to isometries on some partition) there is a natural coding given by the itinerary of a trajectory between the pieces (atoms) of the partition on ...
  • Temporally correlated fluctuations drive epileptiform dynamics 

    Jedynak, M; Pons, AJ; Garcia-Ojalvo, J; Goodfellow, M (Elsevier, 2016-11-16)
    Macroscopic models of brain networks typically incorporate assumptions regarding the characteristics of afferent noise, which is used to represent input from distal brain regions or ongoing fluctuations in non-modelled ...
  • The terrestrial biosphere as a net source of greenhouse gases to the atmosphere 

    Tian, H; Lu, Chaoqun; Ciais, P; Michalak, Anna M; Canadell, JG; Saikawa, Eri; Huntzinger, Deborah N; Gurney, Kevin R; Sitch, S; Zhang, B; Yang, Jia; Bousquet, Philippe; Bruhwiler, Lori; Chen, G; Dlugokencky, Edward; Friedlingstein, P; Melillo, Jerry; Pan, Shufen; Poulter, B; Prinn, Ronald; Saunois, Marielle; Schwalm, Christopher R; Wofsy, Steven C (Nature Publishing Group, 2016-03-09)
    The terrestrial biosphere can release or absorb the greenhouse gases carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O), and therefore has an important role in regulating atmospheric composition and climate1. ...
  • The terrestrial carbon budget of South and Southeast Asia 

    Cervarich, M; Shu, S; Jain, AK; Arneth, A; Canadell, J; Friedlingstein, P; Houghton, RA; Kato, E; Koven, C; Patra, P; Poulter, B; Sitch, S; Stocker, B; Viovy, N; Wiltshire, A; Zeng, N (IOP Publishing, 2016-10-19)
    Accomplishing the objective of the current climate policies will require establishing carbon budget and flux estimates in each region and county of the globe by comparing and reconciling multiple estimates including the ...
  • Theory of ferromagnetic microswimmers 

    Gilbert, Andrew D.; Ogrin, Feodor Y.; Petrov, Peter G.; Winlove, C. Peter (Oxford University Press, 2011)
    This paper considers the dynamics of a microscale swimmer based on two magnetic beads that are elastically coupled together. A time-varying external magnetic field is imposed that has two principal effects: one is to exert ...
  • A theory of passive linear systems with no assumptions 

    Hughes, TH (Elsevier, 2017-09-09)
    We present two linked theorems on passivity: the passive behavior theorem, parts 1 and 2. Part 1 provides necessary and sufficient conditions for a general linear system, described by a set of high order differential ...
  • The thermal phase curve offset on tidally- and non-tidally-locked exoplanets: a shallow water model 

    Penn, J; Vallis, GK (American Astronomical Society / IOP Publishing, 2017-06-20)
    Using a shallow water model with time-dependent forcing we show that the peak of an exoplanet thermal phase curve is, in general, offset from the secondary eclipse when the planet is rotating. That is, the planetary hot-spot ...
  • Thermal-gravitational wind equation for the wind-induced gravitational signature of giant gaseous planets: mathematical derivation, numerical method, and illustrative solutions 

    Schubert, G; Zhang, Keke; Kong, Dali; Schubert, Gerald (American Astronomical Society, 2015-06-20)
    The standard thermal wind equation (TWE) relating the vertical shear of a flow to the horizontal density gradient in an atmosphere has been used to calculate the external gravitational signature produced by zonal winds in ...
  • Three recommendations for evaluating climate predictions 

    Fricker, TE; Ferro, CAT; Stephenson, DB (Wiley / Royal Meteorological Society, 2013-06-10)
    Evaluation is important for improving climate prediction systems and establishing the credibility of their predictions of the future. This paper shows how the choices that must be made about how to evaluate predictions ...
  • A three-dimensional multilayered spherical dynamic interface dynamo using the Malkus-Proctor formulation 

    Chan, K.H.; Liao, X.; Zhang, Keke (IOP Publishing / American Astronomical Society, 2008)
    We investigate a fully three-dimensional and multilayered spherical dynamic interface dynamo using a finite-element method based on the three-dimensional tetrahedralization of the whole spherical system. The dynamic interface ...
  • A three-dimensional numerical solution for the shape of a rotationally distorted polytrope of index unity 

    Kong, D; Zhang, K; Schubert, G; Anderson, J (American Astronomical Society, 2013-02-01)
    We present a new three-dimensional numerical method for calculating the non-spherical shape and internal structure of a model of a rapidly rotating gaseous body with a polytropic index of unity. The calculation is based ...
  • Threshold switching via electric field induced crystallization in phase-change memory devices 

    Vazquez Diosdado, Jorge A.; Ashwin, Peter; Kohary, Krisztian; Wright, C. David (American Institute of Physics, 2012)
    Phase-change devices exhibit characteristic threshold switching from the reset (off) to the set (on) state. Mainstream understanding of this electrical switching phenomenon is that it is initiated electronically via the ...
  • Thresholds for the formation of satellites in two-dimensional vortices 

    Turner, M. R.; Gilbert, Andrew D. (Cambridge University Press, 2008)
    This paper examines the evolution of a two-dimensional vortex which initially consists of an axisymmetric monopole vortex with a perturbation of azimuthal wavenumber m = 2 added to it. If the perturbation is weak, then the ...
  • Time Irreversibility and Criticality in the Motility of a Flagellate Microorganism 

    Wan, KY; Goldstein, RE (American Physical Society, 2018-08-03)
    Active living organisms exhibit behavioral variability, partitioning between fast and slow dynamics. Such variability may be key to generating rapid responses in a heterogeneous, unpredictable environment wherein cellular ...
  • Tipping points in open systems: bifurcation, noise-induced and rate-dependent examples in the climate system 

    Ashwin, Peter; Wieczorek, Sebastian; Vitolo, Renato; Cox, Peter M. (The Royal Society, 2012)
    Tipping points associated with bifurcations (B-tipping) or induced by noise (N-tipping) are recognized mechanisms that may potentially lead to sudden climate change. We focus here on a novel class of tipping points, where ...
  • Toward interplanetary space weather: Strategies for manned missions to Mars 

    Foullon, Claire; Crosby, Norma; Heynderickx, Daniel (American Geophysical Union (AGU), 2005)
    Analysis of the interplanetary space weather environment will contribute to reducing uncertainties and assuring crew radiation safety.
  • Towards a Global Controller Design for Guaranteed Synchronization of Switched Chaotic Systems 

    Pan, I; Das, S; Routh, A (Elsevier, 2014-11-12)
    In this paper, synchronization of identical switched chaotic systems is explored based on Lyapunov theory of guaranteed stability. Concepts from robust control principles and switched linear systems are merged together to ...
  • Towards predictive understanding of regional climate change 

    Xie, Shang-Ping; Deser, Clara; Vecchi, Gabriel; Collins, Matthew; Delworth, Thomas L.; Hall, Alex; Hawkins, Ed; Johnson, Nathaniel C.; Cassou, Christophe; Giannini, Alessandra; Watanabe, Masahiro (Nature Publishing Group, 2015-09-07)
    Regional information on climate change is urgently needed but often deemed unreliable. To achieve credible regional climate projections, it is essential to understand underlying physical processes, reduce model biases and ...
  • Towards quantifying uncertainty in predictions of Amazon 'dieback'. 

    Huntingford, C; Fisher, RA; Mercado, L; Booth, BB; Sitch, S; Harris, PP; Cox, PM; Jones, CD; Betts, RA; Malhi, Y; Harris, GR; Collins, M; Moorcroft, P (Royal Society, 2008-05-27)
    Simulations with the Hadley Centre general circulation model (HadCM3), including carbon cycle model and forced by a 'business-as-usual' emissions scenario, predict a rapid loss of Amazonian rainforest from the middle of ...
  • Towards the validation of a traceable climate model hierarchies 

    Tokmakian, R; Challenor, P (Oxford University Press (OUP), 2017-07-18)
    Background It is a common practice to use a simple model to explain the mechanisms or processes that occur in a much more complex, complete and computationally expensive model. Many such examples can be found in climate ...