Now showing items 128-147 of 1332

  • Cardinality constrained portfolio optimisation 

    Fieldsend, Jonathan E.; Matatko, John; Peng, Ming (Springer Berlin Heidelberg, 2004)
    The traditional quadratic programming approach to portfolio optimisation is difficult to implement when there are cardinality constraints. Recent approaches to resolving this have used heuristic algorithms to search for ...
  • Carrier dynamics in semiconductors studied with time-resolved terahertz spectroscopy 

    Ulbricht, Ronald; Hendry, Euan; Shan, Jie; Heinz, Tony F.; Bonn, Mischa (American Physical Society, 2011)
    Time-resolved, pulsed terahertz spectroscopy has developed into a powerful tool to study charge carrier dynamics in semiconductors and semiconductor structures over the past decades. Covering the energy range from a few ...
  • Cascaded Optical Field Enhancement in Composite Plasmonic Nanostructures 

    Kravets, V.G.; Zoriniants, George; Burrows, Christopher P.; Schedin, F.; Casiraghi, C.; Klar, P.; Geim, A.K.; Barnes, William L.; Grigorenko, A.N. (American Physical Society, 2010)
    We present composite plasmonic nanostructures designed to achieve cascaded enhancement of electromagnetic fields at optical frequencies. Our structures were made with the help of electron-beam lithography and comprise a ...
  • A case study of the radiative forcing of persistent contrails evolving into contrail-induced cirrus 

    Haywood, James M.; Allan, Richard P.; Bornemann, Jorge; Forster, Piers M.; Francis, Peter N.; Milton, Sean; Radel, Gaby; Rap, Alexandru; Shine, Keith P.; Thorpe, Robert (American Geophysical Union (AGU), 2009)
    [1] The radiative forcing due to a distinct pattern of persistent contrails that form into contrail-induced cirrus near and over the UK is investigated in detail for a single case study during March 2009. The development ...
  • Casimir effect from macroscopic quantum electrodynamics 

    Philbin, Thomas G. (Institute of Physics, 2011)
    The canonical quantization of macroscopic electromagnetism was recently presented in New J. Phys. 12 (2010) 123008. This theory is here used to derive the Casimir effect, by considering the special case of thermal and ...
  • Casimir stress in an inhomogeneous medium 

    Philbin, Thomas G.; Xiong, C.; Leonhardt, Ulf (Elsevier Masson, 2010)
    The Casimir effect in an inhomogeneous dielectric is investigated using Lifshitz's theory of electromagnetic vacuum energy. A permittivity function that depends continuously on one Cartesian coordinate is chosen, bounded ...
  • The cassiterite-anatase-ilmenite-monazite-sulphide-chlorite assemblage of North Tincroft Lode 

    LeBoutillier, N.G.; Shail, R.K.; Jewson, C. (USSHER SOC, 2000-01)
    North Tincroft Lode (New Cook's Kitchen Mine) forms a segment of an ENE-WSW-striking lode structure that can be traced for similar to2 km along strike and similar to800 m vertically through the Camborne-Redruth mining ...
  • Catalytic graphitization of electrospun cellulose nanofibres using silica nanoparticles 

    Deng, Libo; Lewandowska, Anna E.; Young, Robert J.; Zhang, Guoping; Sun, Rong; Eichhorn, Stephen J. (Elsevier, 2014)
    Abstract Electrospun cellulose nanofibres have been graphitized in the presence of silica (SiO2) nanoparticles. The structure of the resultant SiC/C hybrids was characterised using transmission electron microscopy, X-ray ...
  • Caution needed when linking weather extremes to amplified planetary waves 

    Screen, James A.; Simmonds, Ian (National Academy of Sciences, 2013)
  • The central role of diminishing sea ice in recent Arctic temperature amplification 

    Screen, James A.; Simmonds, Ian (Nature Publishing Group, 2010)
    The rise in Arctic near-surface air temperatures has been almost twice as large as the global average in recent decades-a feature known as 'Arctic amplification'. Increased concentrations of atmospheric greenhouse gases ...
  • Chaos in symmetric phase oscillator networks 

    Bick, Christian; Timme, Marc; Paulikat, Danilo; Rathlev, Dirk; Ashwin, Peter (American Physical Society, 2011)
    Phase-coupled oscillators serve as paradigmatic models of networks of weakly interacting oscillatory units in physics and biology. The order parameter which quantifies synchronization so far has been found to be chaotic ...
  • Characterising stellar micro-variability for planetary transit searches 

    Aigrain, Suzanne; Favata, F.; Gilmore, G. (EDP Sciences, 2004)
    A method for simulating light curves containing stellar micro-variability for a range of spectral types and ages is presented. It is based on parameter-by-parameter scaling of a multi-component fit to the solar irradiance ...
  • Characteristic matrices for linear periodic delay differential equations 

    Sieber, J.; Szalai, R. (2011)
    Szalai, Stépán, and Hogan [SIAM J. Sci. Comput., 28 (2006), pp. 1301–1317] gave a general construction for characteristic matrices for systems of linear delay differential equations with periodic coefficients. First, we ...
  • Characterization of spin-valves fabricated on opaque substrates by optical ferromagnetic resonance 

    Barman, A.; Kruglyak, V.V.; Hicken, R.J.; Marrows, C.H.; Ali, M.; Hindmarch, A.T.; Hickey, B.J. (American Institute of Physics, 2002)
    We have used a transmission line deposited on a transparent substrate to deliver an optically triggered magnetic field pulse to a spin valve structure deposited upon an opaque substrate. The ensuing ferromagnetic resonance ...
  • Characterization of the Atmosphere of the Hot Jupiter HAT-P-32Ab and the M-dwarf Companion HAT-P-32B 

    Zhao, Ming; O'Rourke, Joseph G.; Wright, Jason T.; Knutson, H.; Burrows, A.S.; Fortney, J.J.; Ngo, Henry; Fulton, Benjamin J.; Baranec, Christoph; Riddle, Reed; Law, Nicholas M.; Muirhead, Philip S.; Hinkley, Sasha; Showman, A.P.; Curtis, Jason; Burruss, Rick (American Astronomical Society / IoP Publishing, 2014)
    We report secondary eclipse photometry of the hot Jupiter HAT-P-32Ab, taken with Hale/Wide-field Infra-Red Camera (WIRC) in H and KS bands and with Spitzer/IRAC at 3.6 and 4.5 μm. We carried out adaptive optics imaging of ...
  • Characterizing the shape of the lumbar spine using an active shape model: reliability and precision of the method 

    Meakin, Judith R.; Gregory, Jennifer S.; Smith, Francis W.; Gilbert, Fiona J.; Aspden, Richard M. (Lippincott, Williams & Wilkins, 2008)
    Study Design. Analysis of positional magnetic resonance images of normal volunteers. Objective. To compare the reliability and precision of an active shape model to that of conventional lordosis measurements. Summary ...
  • Chemical and isotopic architecture of the belemnite rostrum 

    Ullmann, CV; Frei, R; Korte, C; Hesselbo, Stephen P. (Elsevier, 2015-04-04)
    Macrofossil calcite is of great importance for quantitative reconstructions of palaeoenvironment and palaeoseasonality. The calcite rostra of belemnites, Jurassic to Cretaceous marine invertebrates, are especially suited ...
  • The chronology and kinematics of late Palaeozoic deformation in the NW contact metamorphic aureole of the Land's End Granite 

    Hughes, S.P.; Strickland, R.J.; Shail, R.K.; LeBoutillier, N.G.; Alexander, A.C.; Thomas, M. (The Ussher Society, 2009)
    A structural investigation of coastal exposures between Cape Cornwall and Pendeen Watch, in the NW contact metamorphic aureole of the Land’s End Granite, has confirmed a similar deformation chronology as in a reference ...
  • Circularly polarized colour reflection from helicoidal structures in the beetle Plusiotis boucardi 

    Jewell, Sharon A.; Vukusic, Peter; Roberts, N. W. (Institute of Physics and Deutsche Physikalische Gesellschaft, 2007)
    A detailed optical study of the iridescent outer-shell of the beetle Plusiotis boucardi has revealed a novel microstructure which controls both the polarization and wavelength of reflected light. A previously unreported ...
  • A class of exactly solvable models for the Schrodinger equation 

    Downing, C.A. (Springer Verlag, 2013)
    We present a class of confining potentials which allow one to reduce the one-dimensional Schroodinger equation to a named equation of mathematical physics, namely either Bessel's or Whittaker's differential equation. In ...