Now showing items 63-82 of 1119

  • Backflow in the relaxation of a hybrid aligned nematic cell 

    Jewell, Sharon A.; Sambles, J. Roy (American Institute of Physics, 2003)
    The optical convergent-beam technique has been used to measure the changing director profile in a 4.6 µm ZLI-2293 filled hybrid aligned nematic cell when a 7 Vrms ac voltage was removed. The relaxation process has been ...
  • Band gaps in jagged and straight graphene nanoribbons tunable by an external electric field. 

    Saroka, VA; Batrakov, KG; Demin, VA; Chernozatonskii, LA (IOP Publishing, 2015-04-15)
    Band gap control by an external field is useful in various optical, infrared and THz applications. However, widely tunable band gaps are still not practical due to a variety of reasons. Using the orthogonal tight-binding ...
  • Bayesian detection of planetary transits. A modified version of the Gregory-Loredo method for Bayesian periodic signal detection 

    Aigrain, Suzanne; Favata, F. (EDP Sciences, 2002)
    The detection of planetary transits in stellar photometric light-curves is poised to become the main method for finding substantial numbers of terrestrial planets. The French-European mission COROT (foreseen for launch in ...
  • Bayesian matching for X-ray and infrared sources in the MYStIX project 

    Naylor, T; Broos, PS; Feigelson, ED (American Astronomical Society, 2013-11-14)
    Identifying the infrared counterparts of X-ray sources in Galactic plane fields such as those of the MYStIX project presents particular difficulties due to the high density of infrared sources. This high stellar density ...
  • Benchmarking the Multi-dimensional Stellar Implicit Code MUSIC 

    Goffrey, T; Pratt, J; Viallet, M; Baraffe, I; Popov, MV; Walder, R; Folini, D; Geroux, C; Constantino, T (arXiv.org, 2016-10-31)
    We present the results of a numerical benchmark study for the MUlti-dimensional Stellar Implicit Code (MUSIC) based on widely applicable two- and three-dimensional compressible hydrodynamics problems relevant to stellar ...
  • Bielectron vortices in two-dimensional Dirac semimetals 

    Downing, CA; Portnoi, ME (Nature Publishing Group, 2017-10-12)
    Searching for new states of matter and unusual quasi-particles in emerging materials and especially low-dimensional systems is one of the major trends in contemporary condensed matter physics. Dirac materials, which host ...
  • Bio-inspired band-gap tunable elastic optical multilayer fibers. 

    Kolle, M; Lethbridge, A; Kreysing, M; Baumberg, JJ; Aizenberg, J; Vukusic, P (Wiley, 2013-01-27)
    The concentrically-layered photonic structure found in the tropical fruit Margaritaria nobilis serves as inspiration for photonic fibers with mechanically tunable band-gap. The fibers show the spectral filtering capabilities ...
  • Bioavailability of nanoscale metal oxides TiO(2), CeO(2), and ZnO to fish 

    Johnston, B.D.; Scown, Tessa M.; Moger, Julian; Cumberland, Susan A.; Baalousha, Mohamed; Linge, Kathryn; van Aerle, Ronny; Jarvis, Kym; Lead, Jamie R.; Tyler, Charles R. (American Chemical Society, 2010-02-01)
    Nanoparticles (NPs) are reported to be a potential environmental health hazard. For organisms living in the aquatic environment, there is uncertainty on exposure because of a lack of understanding and data regarding the ...
  • Biomechanics of fibrous proteins of the extracellular matrix studied by Brillouin scattering 

    Palombo, F; Winlove, CP; Edginton, RS; Green, E; Stone, N; Caponi, S; Madami, M; Fioretto, D (Royal Society, 2014-10-08)
    Brillouin light scattering (BLS) spectroscopy is a technique that is able to detect thermally excited phonons within a material. The speed of propagation of these phonons can be determined from the magnitude of the Brillouin ...
  • Black Hole Lasers Revisited 

    Leonhardt, Ulf; Philbin, Thomas G. (Springer, 2007)
    The production of Hawking radiation by a single horizon is not dependent on the high-frequency dispersion relation of the radiated field. When there are two horizons, however, Corley and Jacobson have shown that superluminal ...
  • Blue, surface-emitting, distributed feedback polyfluorene lasers 

    Heliotis, G.; Xia, R.; Bradley, D. D. C.; Turnbull, G. A.; Samuel, I. D. W.; Andrew, P.; Barnes, William L. (American Institute of Physics, 2003)
    We report the fabrication of optically-pumped solid-state distributed feedback lasers utilizing two blue-light-emitting semiconducting polyfluorenes as gain media. The lasers were readily fabricated by solution deposition ...
  • Boron nitride encapsulated graphene infrared emitters 

    Barnard, HR; Zossimova, E; Mahlmeister, NH; Lawton, LM; Luxmoore, IJ; Nash, GR (AIP Publishing, 2016-03-28)
    The spatial and spectral characteristics of mid-infrared thermal emission from devices containing a large area multilayer graphene layer, encapsulated using hexagonal boron nitride, have been investigated. The devices were ...
  • Boron-Doped Diamond Dual-Plate Deep-Microtrench Device for Generator-Collector Sulfide Sensing 

    Harvey, HM; Gross, AJ; Brooksby, P; Downard, AJ; Green, SJ; Winlove, CP; Benjamin, N; Winyard, PG; Whiteman, M; Hammond, JL; Estrela, P; Marken, F (Wiley, 2015-07-14)
    A BDD-BDD dual-plate microtrench electrode with 6μm inter-electrode spacing is investigated using generator-collector electrochemistry and shown to give microtrench depth-dependent sulfide detection down to the μM levels. ...
  • Boundary-layer effects on acoustic transmission through narrow slit cavities 

    Ward, GP; Lovelock, RK; Murray, AR; Hibbins, Alastair P.; Sambles, J. Roy; Smith, JD (American Physical Society, 2015-07-21)
    We explore the slit-width dependence of the resonant transmission of sound in air through both a slit array formed of aluminum slats and a single open-ended slit cavity in an aluminum plate. Our experimental results accord ...
  • Bovine and degenerated human annulus fibrosus: a microstructural and micromechanical comparison 

    Vergari, C; Chan, D; Clarke, A; Mansfield, J; Meakin, JR; Winlove, PC (Springer Verlag, 2017-04-04)
    The complex structure of the annulus fibrosus is strongly related to its mechanical properties. Recent work showed that it is possible to observe the relative movement of fibre bundles in loaded cow tail annulus; the aim ...
  • Bright-white beetle scales optimise multiple scattering of light 

    Burresi, M; Cortese, L; Pattelli, L; Kolle, M; Vukusic, P; Wiersma, DS; Steiner, U; Vignolini, S (Nature Publishing Group, 2014)
    Whiteness arises from diffuse and broadband reflection of light typically achieved through optical scattering in randomly structured media. In contrast to structural colour due to coherent scattering, white appearance ...
  • The Brightest Young Star Clusters in NGC 5253 

    Calzetti, D; Johnson, KE; Adamo, A; Gallagher III, JS; Andrews, JE; Smith, LJ; Clayton, GC; Lee, JC; Sabbi, E; Ubeda, L; Kim, H; Ryon, JE; Thilker, D; Bright, SN; Zackrisson, E; Kennicutt, RC; Mink, SED; Whitmore, BC; Aloisi, A; Chandar, R; Cignoni, M; Cook, D; Dale, DA; Elmegreen, BG; Elmegreen, DM; Evans, AS; Fumagalli, M; Gouliermis, DA; Grasha, K; Grebel, EK; Krumholz, MR; Walterbos, R; Wofford, A; Brown, TM; Christian, C; Dobbs, C; Herrero, A; Kahre, L; Messa, M; Nair, P; Nota, A; Oestlin, G; Pellerin, A; Sacchi, E; Schaerer, D; Tosi, M (American Astronomical Society, 2015-09-24)
    The nearby dwarf starburst galaxy NGC5253 hosts a number of young, massive star clusters, the two youngest of which are centrally concentrated and surrounded by thermal radio emission (the `radio nebula'). To investigate ...
  • Preparation of Extracellular Matrix Protein Fibers for Brillouin Spectroscopy 

    Edginton, RS; Mattana, S; Caponi, S; Fioretto, D; Green, E; Winlove, CP; Palombo, F (Journal of Visualized Experiments (JoVE), 2016-09-15)
    Brillouin spectroscopy is an emerging technique in the biomedical field. It probes the mechanical properties of a sample through the interaction of visible light with thermally induced acoustic waves or phonons propagating ...
  • Broad-band polarization conversion from a finite periodic structure in the microwave regime 

    Hallam, B. T.; Lawrence, Christopher R.; Hooper, Ian R.; Sambles, J. Roy (American Institute of Physics, 2004)
    A reflection grating demonstrating extraordinarily broad-band polarization conversion in a nondiffractive regime has been studied at microwave frequencies. This single-element structure has been fabricated by electrolessly ...
  • Broadband and broadangle extraordinary acoustic transmission through subwavelength apertures surrounded by fluids 

    Carretero-Palacios, S.; Murray, Alasdair R.J.; Martín-Moreno, L.; Hibbins, Alastair P. (IOP Publishing for Deutsche Physikalische Gesellschaft, 2014)
    We present a mechanism for ultra-broadband transmission of acoustic waves through subwavelength hole arrays. Different fluids surrounding (or filling) the holes are considered, which allows tuning of the band of maximum ...