Now showing items 219-238 of 1361

  • Controlling unstable chaos: stabilizing chimera states by feedback 

    Sieber, J.; Omel'chenko, Oleh E.; Wolfrum, Matthias (American Physical Society, 2014)
    We present a control scheme that is able to find and stabilize an unstable chaotic regime in a system with a large number of interacting particles. This allows us to track a high dimensional chaotic attractor through a ...
  • Convergence to local random attractors 

    Ashwin, Peter; Ochs, Gunter (Taylor & Francis, 2003)
    Random attractors allow one to classify qualitative and quantitative aspects of the long-time behaviour of stochastically forced systems viewed as random dynamical systems (RDS) in an analogous way to attractors for ...
  • Copula-based frequency analysis of overflow and flooding in urban drainage systems 

    Fu, Guangtao; Butler, David (Elsevier, 2014-03-14)
    The performance evaluation of urban drainage systems is essentially based on accurate characterisation of rainfall events, where a particular challenge is development of the joint distributions of dependent rainfall variables ...
  • Coronal Alfvén speed determination : consistency between seismology using AIA/SDO transverse loop oscillations and magnetic extrapolation 

    Verwichte, E.; Van Doorsselaere, T.; Foullon, Claire; White, R.S. (American Astronomical Society / IOP Publishing, 2013)
    Two transversely oscillating coronal loops are investigated in detail during a flare on the 2011 September 6 using data from the Atmospheric Imaging Assembly (AIA) on board the Solar Dynamics Observatory. We compare two ...
  • Correcting the finite-ensemble bias of the ignorance score 

    Siegert, Stefan; Ferro, Christopher A.T.; Stephenson, David B. (Royal Meteorological Society, 2015)
    This study considers the application of the Ignorance Score (also known as the Logarithmic Score) in the context of ensemble verification. In particular, we consider the case where an ensemble forecast is transformed to a ...
  • Correlations and noise in magnetic recording media 

    Aziz, Mustafa M.; Middleton, Barry K.; Miles, J. J. (IEE-INST ELEC ENG, 2003-09)
    A theory is presented which predicts the role of interparticle correlations in determining the magnetisation power spectral densities within magnetic recording media in the absence of recorded signal magnetisation. Magnetic ...
  • Cost-efficient control of wastewater treatment plants to reduce greenhouse gas emissions 

    Sweetapple, Christine; Fu, Guangtao; Butler, David (IWA Publishing, 2014)
    This research investigates the potential of improved wastewater treatment plant control for the cost-efficient reduction of greenhouse gas (GHG) emissions, providing a detailed exploration of the decision variable search ...
  • A counterexample to "positive realness preserving model reduction with ℋ∞ norm error bounds" 

    Guiver, Chris; Opmeer, Mark R. (Institute of Electrical and Electronics Engineers (IEEE), 2011)
    We provide a counterexample to the H∞ error bound for the difference of a positive real transfer function and its positive real balanced truncation stated in “Positive realness preserving model reduction with H∞ norm error ...
  • Countertraveling waves in rotating Rayleigh-Bénard convection. 

    Li, Ligang; Liao, X.; Zhang, Keke (American Physical Society, 2008)
    Linear and nonlinear counter-traveling waves in a fluid-filled annular cylinder with realistic no-slip boundary conditions uniformly heated from below and rotating about a vertical axis are investigated. When the gap of ...
  • Counting molecular-beam grown graphene layers 

    Plaut, Annette S.; Wurstbauer, Ulrich; Pinczuk, Aron; Garcia, Jorge M.; Pfeiffer, Loren N. (American Institute of Physics, 2013)
    We have used the ratio of the integrated intensity of graphene's Raman G peak to that of the silicon substrate's first-order optical phonon peak, accurately to determine the number of graphene layers across our molecular-beam ...
  • Coupled surface plasmon polaritons on thin metal slabs corrugated on both surfaces 

    Hooper, Ian R.; Sambles, J. Roy (American Physical Society, 2004)
    A modelling study of the effect of coupled surface plasmon polaritons (SPPs) on the optical response of a thin metal film corrugated on both surfaces is presented. Initially the case of conformally corrugated metal films ...
  • Coupled surface plasmon-polariton mediated photoluminescence from a top-emitting organic light-emitting structure 

    Wedge, S.; Wasey, J. A. E.; Barnes, William L.; Sage, I. (American Institute of Physics, 2004)
    We report strong photoluminescence from a top-emitting organic light-emitting structure where emission takes place through a thin (55 nm) silver film. We show that this emission is mediated via coupled surface plasmon-polariton ...
  • Coupled surface plasmons and optical guided wave exploration of near-surface director profile 

    Yang, Fuzi; Ruan, Lizhen; Jewell, Sharon A.; Sambles, J. Roy (Institute of Physics and Deutsche Physikalische Gesellschaft, 2007)
    For a liquid crystal (LC) cell with thin silver claddings it is possible, using a high index coupling prism, to excite both surface plasmon modes and ordinary optical guided modes. In a situation where the tilt of the ...
  • Coupled surface-plasmon-like modes between metamaterial 

    Hibbins, Alastair P.; Lockyear, Matthew J.; Sambles, J. Roy (American Physical Society, 2007)
    Perfectly conducting metals may be structured with holes to make metamaterials that support surface-plasmon-like modes at microwave frequencies. Results are presented for Fabry-Pérot-like standing wave resonances formed ...
  • The coupling of microwave radiation to surface plasmon polaritons and guided modes via dielectric gratings 

    Hibbins, Alastair P.; Sambles, J. Roy; Lawrence, Christopher R. (American Institute of Physics, 2000)
    It is shown that an absorbing dielectric layer, sinusoidally modulated in height, on top of a planar metal substrate, may be used to provide coupling between both s- and p-polarized incident microwave photons and surface ...
  • Coupling of near-grazing microwave photons to surface plasmon polaritons via a dielectric grating 

    Hibbins, Alastair P.; Sambles, J. Roy; Lawrence, Christopher R. (American Physical Society, 2000)
    A dielectric grating on top of a planar metal substrate is shown to couple near-grazing microwave photons to surface plasmon polaritons (SPPs). It is shown that when the grating grooves are oriented such that they are ...
  • Coupling Plasmonic Metamaterials To Single-Quantum-Well Gain 

    Meinzer, Nina (Karlsruher Institut für Technologie, 2011-07-01)
    Reducing unfavourable losses in metallic nanostructures by optical gain is currently one of the central topics in plasmonics and metamaterials research. The main prerequisite for this is the coupling between the plasmonic ...
  • Criteria for robustness of heteroclinic cycles in neural microcircuits. 

    Ashwin, Peter; Karabacak, Ozkan; Nowotny, Thomas (BioMed Central / SpringerOpen, 2011)
    We introduce a test for robustness of heteroclinic cycles that appear in neural microcircuits modeled as coupled dynamical cells. Robust heteroclinic cycles (RHCs) can appear as robust attractors in Lotka-Volterra-type ...
  • Critical fronts in initiation of excitation waves 

    Idris, I.; Biktashev, V. N. (American Physical Society, 2007)
    We consider the problem of initiation of propagating waves in a one-dimensional excitable fiber. In the FitzHugh-Nagumo theory, the key role is played by "critical nucleus" and "critical pulse" solutions whose (center-) ...
  • Crystallization of Ge2Sb2Te5 films by amplified femtosecond optical pulses 

    Liu, Y.; Aziz, Mustafa M.; Shalini, Ashawaraya; Wright, C. David; Hicken, R.J. (American Institute of Physics, 2012)
    The phase transition between the amorphous and crystalline states of Ge2Sb2Te5 has been studied by exposure of thin films to series of 60 femtosecond (fs) amplified laser pulses. The analysis of microscope images of marks ...