Now showing items 155-174 of 720

  • 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 ...
  • Dynamical process of switch-off in a supertwisted nematic cell 

    Yang, Fuzi; Dong, Youmei; Ruan, Lizhen; Sambles, J. Roy (American Institute of Physics, 2004)
    The switch-off dynamics of a 180° supertwisted nematic (STN) are explored in detail by using a convergent beam system and the fully leaky guided-mode technique. From the dynamical guided-mode data and using the Ericksen–Leslie ...
  • Early Results from VLT-SPHERE: Long-Slit Spectroscopy of 2MASS 0122-2439B, a Young Companion Near the Deuterium Burning Limit 

    Hinkley, Sasha; Bowler, Brendan P.; Vigan, Arthur; Aller, Kimberley M.; Liu, M.C.; Mawet, Dimitri; Matthews, Elisabeth; Wahhaj, Zahed; Kraus, Stefan; Baraffe, I.; Chabrier, G. (American Astronomical Society, 2015-05-19)
    We present 0.95–1.80 µm spectroscopy of the ∼12–27 MJup companion orbiting the faint (R∼13.6), young (∼120Myr) M-dwarf 2MASS J01225093–2439505 (“2M0122–2439B”) at 1.′′5 separation (50 AU). Our coronagraphic long-slit ...
  • The Earth as an extrasolar transiting planet: Earth's atmospheric composition and thickness revealed by Lunar eclipse observations 

    Vidal-Madjar, A.; Arnold, L.; Ehrenreich, D.; Ferlet, R.; Lecavelier des Etangs, A.; Bouchy, F.; Segransan, D.; Boisse, I.; Hebrard, G.; Moutou, C.; Desert, J.-M.; Sing, David K.; Cabanac, R.; Nitschelm, C.; Bonfils, X.; Delfosse, X.; Desort, M.; Diaz, R.F.; Eggenberger, A.; Forveille, T.; Lagrange, A.-M.; Lovis, C.; Pepe, F.; Perrier, C.; Pont, F.; Santos, N.C.; Udry, S. (EDP Sciences for European Southern Observatory (ESO), 2010)
    Context. An important goal within the quest for detecting an Earth-like extrasolar planet, will be to identify atmospheric gaseous bio-signatures. Aims. Observations of the light transmitted through the Earth’s atmosphere, ...
  • The effect of episodic accretion on the phase transition of CO and CO2 in low-mass star formation 

    Vorobyov, Eduard I.; Baraffe, I.; Harries, Tim J.; Chabrier, G. (EDP Sciences for European Southern Observatory (ESO), 2013)
    We study the evaporation and condensation of CO and CO_2 during the embedded stages of low-mass star formation by using numerical simulations. We focus on the effect of luminosity bursts, similar in magnitude to FUors and ...
  • Effect of episodic accretion on the structure and the lithium depletion of low-mass stars and planet-hosting stars 

    Baraffe, I.; Chabrier, G. (EDP Sciences, 2010)
    Following up our recent analysis devoted to the impact of non steady accretion on the location of young low-mass stars or brown dwarfs in the Herzsprung-Russell diagram, we perform a detailed analysis devoted to the effect ...
  • Effect of hydroperoxides on red blood cell membrane mechanical properties 

    Hale, John P.; Winlove, C. Peter; Petrov, Peter G. (Biophysical Society, 2011)
    We investigate the effect of oxidative stress on red blood cell membrane mechanical properties in vitro using detailed analysis of the membrane thermal fluctuation spectrum. Two different oxidants, the cytosol-soluble ...
  • The effect of magnetic fields on star cluster formation 

    Price, Daniel J.; Bate, Matthew R. (Oxford University Press / Royal Astronomical Society, 2008)
    We examine the effect of magnetic fields on star cluster formation by performing simulations following the self-gravitating collapse of a turbulent molecular cloud to form stars in ideal magnetohydrodynamics. The collapse ...
  • The Effect of Magnetic Topology on Thermally-Driven Wind: Towards a General Formulation of the Braking Law 

    Reville, Victor; Brun, Allan Sacha; Matt, Sean P.; Strugarek, Antoine; Pinto, Rui F. (American Astronomical Society, 2015)
    Stellar wind is thought to be the main process responsible for the spin down of main-sequence stars. The extraction of angular momentum by a magnetized wind has been studied for decades, leading to several formulations for ...
  • Effect of microplastic on the gills of the Shore Crab Carcinus maenas 

    Watts, AW; Mauricio A. Urbina, MU; Goodhead, RG; Moger, JJ; Lewis, CL; Galloway, TG (American Chemical Society, 2016-04-12)
    Microscopic plastic debris (microplastics, <5mm in diameter) is ubiquitous in the marine environment. Previous work has shown that microplastics may be ingested and inhaled by the shore crab Carcinus maenas although the ...
  • The effect of rotational disorder on the microwave transmission of checkerboard metal square arrays 

    Tremain, B; Durrant, CJ; Carter, IE; Hibbins, Alastair P.; Sambles, J. Roy (Nature Publishing Group: Open Access Journals - Option C, 2015-11-16)
    The effect of rotational disorder on the microwave transmission through thin metallic checkerboard arrays has been experimentally studied. Broad resonant features below the onset of diffraction, attributed to electromagnetic ...
  • Effect of structural disorder on quantum oscillations in graphite 

    Camargo, BC; Kopelevich, Y; Usher, Alan; Hubbard, SB (American Institute of Physics (AIP), 2016-01-18)
    We have studied the effect of structural disorder on the de Haas van Alphen and Shubnikov de Haas quantum oscillations measured in natural, Kish, and highly oriented pyrolytic graphite samples at temperatures down to 30 ...
  • Effect of the stellar spin history on the tidal evolution of close-in planets 

    Bolmont, E; Raymond, SN; Leconte, J; Matt, Sean P. (EDP Sciences, 2012-08-10)
    Context. The spin rate of stars evolves substantially during their lifetime, owing to the evolution of their internal structure and to external torques arising from the interaction of stars with their environments and ...
  • Efficiency of Exciton and Charge Carrier Photogeneration in a Semiconducting Polymer 

    Hendry, Euan; Schins, Juleon M.; Candeias, L. P.; Siebbeles, L. D. A.; Bonn, Mischa (American Physical Society, 2004)
    We determine the efficiencies for the formation of excitons and charge carriers following ultrafast photoexcitation of a semiconducting polymer (MEH-PPV). The simultaneous, quantitative determination of exciton and charge ...
  • Efficiency of radiative emission from thin films of a light-emitting conjugated polymer 

    Wasey, J. A. E.; Safanov, A.; Samuel, I. D. W.; Barnes, William L. (American Physical Society, 2001)
    We examine the efficiency of radiative emission from thin layers of light-emitting conjugated polymers. We compare our experimental results for photoluminescence of the conjugated polymer poly(2-methoxy, 5-(2′-ethyl-hexyloxy) ...
  • Efficient coupling of surface plasmon polaritons to radiation using a bi-grating 

    Worthing, P. T.; Barnes, William L. (American Institute of Physics, 2001)
    A nanostructured surface in the form of a bi-grating is shown to efficiently couple surface plasmon polaritons to free-space radiation in the visible part of the spectrum. Coupling was achieved for all propagation directions ...
  • Eight new T4.5-T7.5 dwarfs discovered in the UKIDSS large area survey data release 1 

    Lodieu, N.; Pinfield, D.J.; Leggett, S.K.; Jameson, R.F.; Mortlock, D.J.; Warren, S.J.; Burningham, B.; Lucas, P.W.; Chiu, K.; Liu, M.C.; Venemans, B.P.; McMahon, R.G.; Allard, F.; Baraffe, I.; Navascue, D.B.Y.; Carraro, G.; Casewell, S.L.; Chabrier, G.; Chappelle, R.J.; Clarke, F.; Day-Jones, A.C.; Deacon, N.R.; Dobbie, P.D.; Folkes, S.L.; Hambly, N.C.; Hewett, P.C.; Hodgkin, S.T.; Jones, H.R.A.; Kendall, T.R.; Magazzu, A.; Martin, E.L.; McCaughrean, M.J.; Nakajima, T.; Pavlenko, Y.; Tamura, M.; Tinney, C.G.; Osorio, M.R.Z. (Oxford University Press for Royal Astronomical Society, 2007)
    We present eight new T4.5-T7.5 dwarfs identified in the UKIRT (United Kingdom Infrared Telescope) Infrared Deep Sky Survey (UKIDSS) Large Area Survey (LAS) Data Release 1 (DR1). In addition we have recovered the T4.5 dwarf ...
  • Electric dipole moment oscillations in Aharonov-Bohm quantum rings 

    Alexeev, Arseny; Portnoi, M.E. (American Physical Society, 2012)
    Magneto-oscillations of the electric dipole moment are predicted and analyzed for a single-electron nanoscale ring pierced by a magnetic flux (an Aharonov-Bohm ring) and subjected to an electric field in the ring's plane. ...
  • Electromagnetic energy-momentum in dispersive media 

    Philbin, Thomas G. (American Physical Society, 2011)
    The standard derivations of electromagnetic energy and momentum in media take Maxwell’s equations as the starting point. It is well known that for dispersive media this approach does not directly yield exact expressions ...
  • Electromagnetic Properties of Ultrathin Quadrifilar Spirals and Their Complementary Structures 

    Meinzer, Nina; Hibbins, Alastair P.; Sambles, J. Roy (-, 2015-07)
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