Now showing items 303-322 of 1381

  • Discovery of Seven Companions to Intermediate Mass Stars with Extreme Mass Ratios in the Scorpius-Centaurus Association 

    Hinkley, Sasha; Kraus, Adam L.; Ireland, Michael J.; Cheetham, Anthony; Carpenter, John M.; Tuthill, Peter; Lacour, Sylvestre; Evans, T.M.; Haubois, Xavier (American Astronomical Society / IoP Publishing, 2015-06-04)
    We report the detection of seven low-mass companions to intermediate-mass stars (SpT B/A/F; M ∼ 1.5–4.5Me) in the Scorpius–Centaurus (Sco–Cen) Association using nonredundant aperture masking interferometry. Ournewly detected ...
  • Discrete computation using a perturbed heteroclinic network 

    Ashwin, Peter; Borresen, Jon (Elsevier, 2005)
    Transient synchronization into clusters appears in many biological and physical systems and seems to be important for computation within neural systems. In this paper we show how one can robustly and effectively perform ...
  • Dispersion of collective magnonic modes in stacks of nanoscale magnetic elements 

    Dvornik, Mykola; Kruglyak, V.V. (American Physical Society, 2011)
    We report a numerical study of the dispersion of collective magnonic modes in magnonic crystals formed by stacks of magnetostatically coupled magnetic nanoelements. The calculations reveal that the sign of the magnonic ...
  • Dispersion of surface plasmon polaritons on short-pitch metal gratings 

    Hooper, Ian R.; Sambles, J. Roy (American Physical Society, 2002)
    The dispersion of surface plasmon polaritons (SPPs) has been calculated for short-pitch metal gratings for various depths. For gratings with depths greater than their pitch very flat SPP bands are formed in the zero-order ...
  • Distance Metric Learning with Eigenvalue Optimization 

    Ying, Yiming; Peng, Li (Microtome Publishing, 2012)
    The main theme of this paper is to develop a novel eigenvalue optimization framework for learning a Mahalanobis metric. Within this context, we introduce a novel metric learning approach called DML-eig which is shown to ...
  • Divergence of Casimir stress in inhomogeneous media 

    Simpson, William M.R.; Horsley, S.A.R.; Leonhardt, Ulf (American Physical Society, 2013)
    We examine the local behavior of the regularized stress tensor commonly used in calculations of the Casimir force for a dielectric medium inhomogeneous in one direction. It is shown that the usual expression for the stress ...
  • DMAC Fatigued Shackle 

    Vickers, Andrew; Gordelier, Tessa (University of Exeter, 2013-06-04)
    Results, photos and video footage of shackle tests at DMaC. Shackle trials conducted to determine shackle behaviour of a 2.5t rated shackle for research into mooring line reliability. Break tests and fatigue tests ...
  • Domain-wall pinning, nonadiabatic spin-transfer torque, and spin-current polarization in permalloy wires doped with vanadium 

    Lepadatu, S.; Claydon, J.S.; Kinane, C.J.; Charlton, T.R.; Langridge, Sean; Potenza, A.; Dhesi, Sarnjeet S.; Keatley, Paul Steven; Hicken, R.J.; Hickey, B.J.; Marrows, C.H. (American Physical Society, 2010)
    Using pulsed-current measurements we investigate the domain-wall depinning via spin-transfer torque from pinning potentials in V-doped Ni80Fe20 wires. The domain-wall depinning boundary, showing the variation of threshold ...
  • Dominance Measures for Multi-Objective Simulated Annealing 

    Smith, Kevin I.; Everson, Richard M.; Fieldsend, Jonathan E. (Institute of Electrical and Electronics Engineers (IEEE), 2004)
    Simulated annealing (SA) is a provably convergent optimiser for single-objective (SO) problems. Previously proposed MO extensions have mostly taken the form of an SO SA optimising a composite function of the objectives. ...
  • Dominance-Based Multiobjective Simulated Annealing 

    Smith, Kevin I.; Everson, Richard M.; Fieldsend, Jonathan E.; Murphy, Chris; Misra, Rashmi (Institute of Electrical and Electronics Engineers (IEEE), 2008)
    Simulated annealing is a provably convergent optimizer for single-objective problems. Previously proposed multiobjective extensions have mostly taken the form of a single-objective simulated annealer optimizing a composite ...
  • Double circulant constructions of the Leech lattice 

    Chapman, Robin (Cambridge University Press (CUP), 2000)
  • Double-period zero-order metal gratings as effective selective absorbers 

    Tan, W.-C.; Sambles, J. Roy; Preist, T. W. (American Physical Society, 2000)
    The electromagnetic response of a zero-order metal grating having a primary deep short-period component and a shallow long-period component is modeled. It is found that such a metal grating has an unusual surface-plasmon-polariton ...
  • Dramatic interannual changes of perennial Arctic sea ice linked to abnormal summer storm activity 

    Screen, James A.; Simmonds, Ian; Keay, Kevin (American Geophysical Union, 2011)
    The perennial (September) Arctic sea ice cover exhibits large interannual variability, with changes of over a million square kilometers from one year to the next. Here we explore the role of changes in Arctic cyclone ...
  • Drift of scroll waves in thin layers caused by thickness features: asymptotic theory and numerical simulations 

    Biktasheva, I. V.; Dierckx, H.; Biktashev, V. N. (American Physical Society, 2015)
    A scroll wave in a very thin layer of excitable medium is similar to a spiral wave, but its behavior is affected by the layer geometry. We identify the effect of sharp variations of the layer thickness, which is separate ...
  • A DSS generator for multiobjective optimisation of spreadsheet-based models 

    Savic, Dragan; Bicik, Josef; Morley, Mark S. (Elsevier, 2011)
    Water management practice has benefited from the development of model-driven Decision Support Systems (DSS), and in particular those that combine simulation with single or multiple-objective optimisation tools. However, ...
  • Dual Trigger of Transverse Oscillations in a Prominence by EUV Fast and Slow Coronal Waves: SDO/AIA and STEREO/EUVI Observations 

    Gosain, S.; Foullon, Claire (American Astronomical Society / IOP Publishing, 2012)
    We analyze flare-associated transverse oscillations in a quiescent solar prominence on 2010 September 8-9. Both the flaring active region and the prominence were located near the west limb, with a favorable configuration ...
  • Durability of synthetic mooring lines for ocean energy devices 

    Weller, S.D.; Davies, P.; Thies, Philipp R.; Harnois, Violette; Johanning, Lars (ICOE, 2012-10)
    The mooring systems of Marine Energy Converters (including wave energy, tidal energy and offshore floating wind systems) are critical elements and a thorough understanding of their long term durability is essential to ...
  • Dynamic configurational anisotropy in nanomagnets 

    Kruglyak, V.V.; Keatley, Paul Steven; Hicken, R.J.; Childress, J.R.; Katine, J.A. (American Physical Society, 2007)
    The angular dependence of ultrafast magnetization dynamics in nanomagnets of square shape was studied by magneto-optical pump-probe measurements. In agreement with micromagnetic simulations, both the number of precessional ...
  • Dynamic control of visible radiation by a liquid crystal filled Fabry-Pérot etalon 

    Jewell, Sharon A.; Cornford, Stephen Leslie; Sambles, J. Roy (American Institute of Physics, 2007)
    A liquid crystal filled Fabry-Pérot etalon has been constructed to control the resonant transmission of electromagnetic radiation over the visible range of the spectrum. This has been achieved through the use of a 1.5 µm ...
  • Dynamic inundation simulation of storm water interaction between sewer system and overland flows 

    Hsu, Ming-Hsi; Chen, Shiuan‐Hung; Chang, Tsang-Jung (Taylor & Francis / Chinese Institute of Engineers, 2002)
    An improved urban inundation model, coupling a 2D non‐inertia overland flow model with a storm water management model, is adopted to simulate inundation in urban areas. The model computes, not only the overland runoff and ...