Now showing items 151-170 of 729

  • Distribution and mass of diffuse and dense CO gas in the Milky Way 

    Roman-Duval, J; Heyer, M; Brunt, C; Clark, P; Klessen, R; Shetty, R (American Astronomical Society, 2016-02-17)
    Emission from carbon monoxide (CO) is ubiquitously used as a tracer of dense star-forming molecular clouds. There is, however, growing evidence that a significant fraction of CO emission originates from diffuse molecular ...
  • 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 ...
  • 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 of interface chemistry over the bulk properties in determining the electronic structure of epitaxial metal/perovskite oxide heterojunctions 

    Chambers, SA; Du, Y; Gu, M; Droubay, TC; Hepplestone, SP; Sushko, PV (American Chemical Society, 2015-05-13)
    We show that despite very similar crystallographic properties and work function values in bulk Fe and Cr, epitaxial films of these metals on Nb:SrTiO3(001) exhibit completely different heterojunction electronic properties. ...
  • 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 ...
  • Drug delivery into microneedle-porated nails from nanoparticle reservoirs. 

    Chiu, Wing Sin; Belsey, Natalie A.; Garrett, Natalie; Moger, Julian; Price, GJ; Begoña Delgado-Charro, M; Guy, Richard H. (Elsevier, 2015-10-15)
    This study demonstrates the potential of polymeric nanoparticles as drug reservoirs for sustained topical drug delivery into microneedle-treated human nail. Laser scanning confocal microscopy was used to image the delivery ...
  • 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 ...
  • 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 ...