Browsing Mathematics and Physics by Title

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Browsing Mathematics and Physics by Title

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  • Hill, Joe M.; Lloyd, Noel G.; Pearson, Jane M. (2007)
    We present conditions for the origin to be a centre for a class of cubic systems. Some of the centre conditions are determined by finding complicated invariant functions. We also investigate the coexistence of fine foci ...
  • Kargl, Florian; Meyer, A.; Horbach, J.; Kob, W. (2004-07)
    We use inelastic neutron scattering and molecular dynamics simulation to investigate the interplay between the structure and the fast sodium ion diffusion in various sodium silicates. With increasing temperature and ...
  • Dey, Santanu; Gohm, Rolf (2007-05-01)
    Motivated by a result on weak Markov dilations, we define a notion of characteristic function for ergodic and coisometric row contractions with a one-dimensional invariant subspace for the adjoints. This extends a definition ...
  • Dey, Santanu; Gohm, Rolf (2011-10-31)
    We introduce characteristic functions for certain contractive liftings of row contractions. These are multi-analytic operators which classify the liftings up to unitary equivalence and provide a kind of functional model. ...
  • Langstaff, David; Birkinshaw, K. (2005-12-22)
    A charge detector array for recording signals from a microchannel plate (MCP) in which a synchroniser circuit (14) is provided in respect of each of a plurality of channels, interposed between a respective charge amplifier ...
  • Innes, Davina; Brown, Daniel; Parnell, Clare; Bewsher, Danielle (2005-03-11)
    Blinkers are brightenings at network cell junctions that are traditionally identified with SOHO/CDS and explosive events or high velocity events are identified in high resolution UV spectra obtained from HRTS and SOHO/SUMER. ...
  • Wood, Ian; Brown, B. Malcolm; Eastham, M. S. P. (2008)
    The method of singular sequences is used to provide a simple and, in some respects, a more general proof of a known spectral result for leaky wires. The method introduces a new concept of asymptotic straightness.
  • Gohm, Rolf; Skeide, M. (2005-06-02)
    We apply Hilbert module methods to show that normal completely positive maps admit weak tensor dilations. Appealing to a duality between weak tensor dilations and extensions of CP-maps, we get an existence proof for certain ...
  • Cook, Anthony; Gibbens, M. J. (IEEE, 2006)
    We investigate the use of statistical shape measures for segmented image regions to construct taxonomies of visual similarity. It is demonstrated that without the use of a priori knowledge, cluster analysis can be used to ...
  • Gough, John Edward (2008-11-07)
    We show that it is possible to construct closed quantum systems governed by a bilinear Hamiltonian depending on an arbitrary input signal. This is achieved by coupling the system to a quantum input field and performing a ...
  • Jones, T. S.; Zahn, D. R.; McGovern, I. T.; Cabailh, G.; Evans, Stephen; Evans, Andrew; Steiner, H. J.; Park, S.; Middleton, R.; Kanpen, T. U.; Evans, David Andrew (2003-09-12)
    The growth of the organic semiconductor CuPc on the InSb(111)A surface at 300 K has been studied using photoelectron spectroscopy. Core level emission data obtained using low energy synchrotron radiation reveal that the ...
  • Habbal, Shadia Rifai; Li, Xing (2003-12-01)
    A two-fluid dynamic model of long-lived coronal loops is presented, whereby heating of the confined plasma is achieved by turbulence-driven Alfvén waves. It is assumed that the nonthermal motions inferred from spectral ...
  • Dewis, K. L.; Balthazor, R. L.; Middleton, H. R.; Pryse, Sian (2005)
    The dayside high-latitude trough is a persistent feature of the post-noon wintertime auroral ionosphere. Radio tomography observations have been used to map its location and latitudinal structure under quiet geomagnetic ...
  • Parker, D.; Browning, R.; Waltham, N.; Grande, Manuel (2003)
    The D-CIXS Compact X-ray Spectrometer will provide high quality spectroscopic mapping of the Moon, the primary science target of the ESA SMART-1 mission. D-CIXS consists of a high throughput spectrometer, which will perform ...
  • Kellett, B.; Perry, C. H.; Howe, C.; Grande, Manuel (2007-01)
    The SMART-1 mission has recently arrived at the Moon. Its payload includes D-CIXS, a compact X-ray spectrometer. SMART-1 is a technology evaluation mission, and D-CIXS is the first of a new generation of planetary X-ray ...
  • Morgan, Huw; Habbal, Shadia Rifai; Woo, Richard (2006-07-01)
    The very steep decrease in density with heliocentric distance makes imaging of coronal density structures out to a few solar radii challenging. The radial gradient in brightness can be reduced using numerous image processing ...
  • Evans, D. A.; McGlynn, A. G.; Towlson, B. M.; Gunn, M.; Jones, D.; Jenkins, T. E.; Winter, R.; Poolton, N. R. J. (2008-02-20)
    Using synchrotron-based luminescence excitation spectroscopy in the energy range 4–20 eV at 8 K, the indirect _x005F_x0002_–X optical band-gap transition in cubic boron nitride is determined as 6.36 ± 0.03 eV, and the ...
  • Hieber, Matthias; Wood, Ian (2007-07-01)
    Consider the Dirichlet problem for elliptic and parabolic equations in non-divergence form with variable coefficients in convex bounded domains of Rn. We prove solvability of the elliptic problem and maximal Lq-Lp-estimates ...
  • Wood, Ian; Hieber, Matthias (2007)
    Consider the Dirichlet problem for elliptic and parabolic equations in nondivergence form with variable coefficients in convex bounded domains of R^n. We prove solvability of the elliptic problem and maximal L^q-L^p-estimates ...
  • Kargl, Florian; Sjöström, J.; Swenson, J.; Fernandez-Alonso, F. (2007)
    The dynamics of water in fresh and in rehydrated white bread is studied using quasielastic neutron scattering (QENS). A diffusion constant for water in fresh bread, without temperature gradients and with the use of a ...

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