Browsing Mathematics and Physics by Title

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  • Lloyd, Noel G.; Pearson, Jane M.; Hill, Joe M. (2007-07-01)
    This paper is concerned with obtaining the conditions under which the origin is an isochronous centre for certain planar polynomial systems. The necessity of these conditions is proved using a computer implementation of ...
  • Hieber, Matthias; Wood, Ian (2003)
    The starting point for this article is a well-known example by M.~Renardy showing the failure of the equality $\omega(T)=s(A)$ for a first order perturbation to the wave equation, where $\omega(T)$ denotes the growth bound ...
  • Gough, John Edward (2005)
    We construct a transformation between Bose Fock space and Fermi Fock space that is super-symmetric in the sense that it converts Boson fields into Fermi fields over a fixed one-particle space h. The transformation the ...
  • Brown, B. Malcolm; Wood, Ian; Marletta, Marco; Naboko, Serguei (2008-03)
    Starting with an adjoint pair of operators, under suitable abstract versions of standard PDE hypotheses, we consider the Weyl M-function of extensions of the operators. The extensions are determined by abstract boundary ...
  • 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 ...
  • 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 (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 ...
  • 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 ...
  • Bewsher, Danielle; Innes, Davina; Parnell, Clare; Brown, Daniel (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.
  • Evans, David Andrew; Steiner, H. J.; Evans, Stephen; Middleton, R.; Jones, T. S.; Park, S.; Kampen, T. U.; Zahn, D. R. T.; Cabailh, G.; McGovern, I. T. (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 ...
  • Winter, Rudolf; Le Messurier, Daniel; Martin, Christopher M. (2006-07)
    Energy-dependent small-angle x-ray scattering (SAXS) measurements near the Zr-K absorption edge of a nano-scale alumina-zirconia-silicate ceramic are reported. The in-situ experiments cover the temperature range from 250C ...
  • Breen, Andrew; Fallows, Richard A.; Canals, A.; Ofman, L.; Moran, P. J. (2002-09)
    Interplanetary scintillation measurements can yield estimates of a large number of solar wind parameters,including bulk flow speed, variation in bulk velocity along the observing path through the solar wind and random ...
  • Middleton, H. R.; Pryse, Sian; Kersley, Leonard; Bust, G. S.; Fremouw, E. J.; Secan, J. A.; Denig, W. F. (2005-07-09)
    The activities of the International Ionospheric Tomography Community open up new possibilities of simultaneously imaging the large-scale spatial structure of the ionosphere in different longitude sectors. In the study, ...
  • Langstaff, David; Bushell, A.; Chase, Thomas Robert; Evans, Andrew (Elsevier, 2005-08)
    In electron spectroscopy, multi-channel detection combined with intense radiation sources provides the optimum experimental configuration. Building on the 5 mm, 192-channel ion detector developed at Aberystwyth, longer ...
  • Chase, Thomas Robert; Evans, D. A.; Langstaff, David; Bushell, A. (2005-08)
    In electron spectroscopy, multi-channel detection combined with intense radiation sources provides the optimum experimental configuration. Building on the 5 mm, 192-channel ion detector developed at Aberystwyth, longer ...
  • Pintér, Balázs; Erdélyi, R.; Goossens, M. (2007-04)
    The coupling of solar global acoustic oscillations to a magnetised solar atmosphere is studied here. The solar interior - atmosphere interface is modelled by a non-magnetic polytrope interior overlayed by a planar atmosphere ...
  • Pintér, Balázs; Erdélyi, R.; Goossens, M. (2007-04)
    The coupling of solar global acoustic oscillations to a magnetised solar atmosphere is studied here. The solar interior - atmosphere interface is modelled by a non-magnetic polytrope interior overlayed by a planar atmosphere ...
  • Le Messurier, Daniel; Winter, Rudolf; Martin, Christopher M. (2006-07)
    Small-Angle X-ray Scattering (SAXS) is used at two energies, one either side of the zirconium K-edge, to probe the in-situ formation of an alumina-zirconia-silicate ceramic. The use of energies either side of the edge ...
  • Breen, Andrew; Jones, R. A.; Fallows, Richard A.; Canals, A. (American Geophysical Union, 2007-08)
    Observations suggest that the interplanetary extensions of coronal mass ejections (iCMEs) may be accelerated or decelerated in their passage through the solar wind. Interplanetary scintillation measurements (IPS) can detect ...

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