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Now showing items 1-20 of 483

  • Accessing the Thermal Mass above Suspended Ceilings via a Perimeter Gap: a CFD Study of Naturally Ventilated Spaces 

    Morey, Scott; Coley, David; Kershaw, Tristan (VEETECH Ltd., 2010)
    There is a growing desire to reduce peak temperatures within non-domestic buildings by accessing the thermal mass of separating floors. These floors are typically formed of concrete and can store reasonable amounts of heat. ...
  • Accuracy of stellar parameters of exoplanet-host stars determined from asteroseismology 

    Mulet-Marquis, C.; Baraffe, I.; Aigrain, Suzanne; Pont, F. (EDP Sciences, 2009)
    Context. In the context of the space-based mission CoRoT, devoted to asteroseismology and search for planet transits, we analyse the accuracy of fundamental stellar parameters (mass, radius, luminosity) that can be obtained ...
  • Accuracy tests of radiation schemes used in hot Jupiter global circulation models 

    Amundsen, David S.; Baraffe, I.; Tremblin, Pascal; Manners, James; Hayek, W.; Mayne, Nathan J.; Acreman, David M. (EDP Sciences for European Southern Observatory (ESO), 2014)
    The treatment of radiation transport in global circulation models (GCMs) is crucial to correctly describe Earth and exoplanet atmospheric dynamics processes. The two-stream approximation and correlated-k method are currently ...
  • An acoustic double fishnet using Helmholtz resonators 

    Murray, Alasdair R.J.; Summers, I.R.; Sambles, J. Roy; Hibbins, Alastair P. (Acoustical Society of America, 2014)
    The acoustic transmission of a closely spaced pair of patterned and perforated rigid plates is explored in air. The structure resembles an acoustic double fishnet design, with each plate modified such that the gap between ...
  • Addendum: “The two-dimensional hydrogen atom revisited” [J. Math. Phys. 43, 4681 (2002)] 

    Parfitt, D.G.W.; Portnoi, M.E. (American Institute of Physics, 2003)
  • Aharonov-Bohm quantum rings in high-Q microcavities 

    Alexeev, Arseny; Shelykh, I.A.; Portnoi, M.E. (American Physical Society, 2013)
    A single-mode microcavity with an embedded Aharonov-Bohm quantum ring, which is pierced by a magnetic flux and subjected to a lateral electric field, is studied theoretically. It is shown that external electric and magnetic ...
  • All-graphene photodetectors 

    Withers, Freddie; Bointon, Thomas H.; Craciun, Monica F.; Russo, Saverio (American Chemical Society, 2013)
    We investigate the optoelectronic properties of novel graphene/FeCl3-intercalated few-layer graphene (FeCl3-FLG, dubbed graphexeter) heterostructures using photovoltage spectroscopy. We observe a prominent photovoltage ...
  • An alternative calculation of the Casimir forces between birefringent plates 

    Philbin, Thomas G.; Leonhardt, Ulf (American Physical Society, 2008)
    Barash has calculated the Casimir forces between parallel birefringent plates with optical axes parallel to the plate boundaries [Izv. Vyssh. Uchebn.\ Zaved., Radiofiz., {\bf 12}, 1637 (1978)]. The interesting new feature ...
  • AMBER/VLTI observations of the B[e] star MWC 300 

    Wang, Y.; Weigelt, Gerd; Kreplin, Alexander; Hofmann, Karl-Heinz; Kraus, Stefan; Miroshnichenko, A.S.; Schertl, D.; Chelli, A.; Domiciano de Souza, A.; Massi, F.; Robbe-Dubois, S. (EDP Sciences for European Southern Observatory (ESO), 2012)
    Aims. We study the enigmatic B[e] star MWC 300 to investigate its disk and binary with milli-arcsecond-scale angular resolution. Methods. We observed MWC 300 with the VLTI/AMBER instrument in the H and K bands and ...
  • AMI-LA radio continuum observations of Spitzer c2d small clouds and cores: Perseus region 

    Scaife, Anna M.M.; Hatchell, Jennifer; Davies, Matthew; Franzen, Thomas M.O.; Grainge, Keith J.B.; Hobson, Michael P.; Hurley-Walker, Natasha; Lasenby, Anthony N.; Olamaie, Malak; Perrott, Yvette C.; Pooley, Guy G.; Rodríguez-Gonzálvez, Carmen; Saunders, Richard D.E.; Schammel, Michel P.; Scott, Paul F.; Shimwell, Timothy; Titterington, David; Waldram, Elizabeth (Oxford University Press / Royal Astronomical Society, 2011)
    We present deep radio continuum observations of the cores identified as deeply embedded young stellar objects in the Perseus molecular cloud by the Spitzer c2d programme at a wavelength of 1.8 cm with the Arcminute Microkelvin ...
  • Analysis of the sign-dependent switching observed in a hybrid aligned nematic cell 

    Cornford, Stephen Leslie; Taphouse, T. S.; Sambles, J. Roy (Institute of Physics and Deutsche Physikalische Gesellschaft, 2009)
    An optical waveguide experiment was used to study the influence of dc electric fields on a hybrid aligned nematic liquid crystal cell. This dc switching differed from ac switching in two ways: first, the equilibrium states ...
  • The ancient heritage of water ice in the solar system 

    Cleeves, L. Ilsedore; Bergin, Edwin A.; Alexander, Conel M. O’D.; Du, Fujun; Graninger, Dawn; Oberg, Karin I.; Harries, Tim J. (American Association for the Advancement of Science, 2014)
    Identifying the source of Earth's water is central to understanding the origins of life-fostering environments and to assessing the prevalence of such environments in space. Water throughout the solar system exhibits ...
  • Angle-independent microwave absorption by ultrathin microcavity arrays 

    Brown, James R.; Hibbins, Alastair P.; Lockyear, Matthew J.; Lawrence, Christopher R.; Sambles, J. Roy (American Institute of Physics, 2008)
    The resonant absorption of microwave radiation by thin, two-dimensional microcavity arrays has been studied. Resonant modes associated with these structures, formed from copper-clad FR4 laminates, exhibit both an azimuthal ...
  • Anisotropy, damping and coherence of magnetization dynamics in a 10 µm square Ni81Fe19 element 

    Barman, A.; Kruglyak, V.V.; Hicken, R.J.; Kundrotaite, A.; Rahman, M. (American Institute of Physics, 2003)
    We have studied magnetization precession in a square Ni81Fe19 element, of 10 μm width, by time-resolved scanning Kerr effect microscopy. From the frequency of precession, we deduce a fourfold in-plane anisotropy of about ...
  • Anyon exciton revisited 

    Parfitt, D.G.W.; Portnoi, M.E. (2003)
    We review the main results of the anyon exciton model in light of recent criticism by Wojs and Quinn. We show that the appearance of fractionally charged anyon ions at the bottom of their numerically calculated excitation ...
  • Anyon exciton revisited: Exact solutions for a few-particle system 

    Parfitt, D.G.W.; Portnoi, M.E. (American Physical Society, 2003)
    The anyon exciton model is generalized to the case of a neutral exciton consisting of a valence hole and an arbitrary number N of fractionally charged quasielectrons (anyons). A complete set of exciton basis functions is ...
  • Anyon excitons 

    Rashba, E.I.; Portnoi, M.E. (American Physical Society, 1993)
    We propose a model of an anyon exciton consisting of a hole and several anyons, and apply it to the spectroscopy of an incompressible quantum liquid. Fractionalization of the electron charge makes properties of such entities ...
  • Are pre-main-sequence stars older than we thought? 

    Naylor, Tim (Oxford University Press / Royal Astronomical Society, 2009)
    We fit the colour–magnitude diagrams of stars between the zero-age main-sequence and terminal-age main sequence in young clusters and associations. The ages we derive are a factor of 1.5–2 longer than the commonly used ...
  • Assessing the risk of climate change for buildings: A comparison between multi-year and probabilistic reference year simulations 

    Kershaw, Tristan; Eames, Matthew E.; Coley, David (Elsevier, 2011)
    Given a changing climate, there is a need to provide data for future years so that practicing engineers can investigate the impact of climate change on particular designs and examine any risk the client might be exposed ...
  • Atmospheric escape from HD 189733b observed in H i Lyman-α: Detailed analysis of HST/STIS September 2011 observations 

    Bourrier, V.; Lecavelier des Etangs, A.; Dupuy, H.; Ehrenreich, D.; Vidal-Madjar, A.; Hebrard, G.; Ballester, G.; Desert, J.-M.; Ferlet, R.; Sing, David K.; Wheatley, P.J. (EDP Sciences for European Southern Observatory (ESO), 2013)
    Observations of transits of the hot giant exoplanet HD 189733b in the unresolved H i Lyman-α line show signs of hydrogen escaping the upper atmosphere of the planet. New resolved Lyman-α observations obtained with the STIS ...