Browsing Mathematics and Physics by Title

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Browsing Mathematics and Physics by Title

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  • Morris, Alun O. (University of Wales Aberystwyth, 2008-11-04)
    Cyfieithiad yw'r llyfr hwn o Linear Algebra - An Introduction a ymddangosodd gyntaf yn 1978 ac a gyhoeddwyd gan y cwmni Van Nostrand Reinhold. Cafwyd Ail Argraffiad yn 1982 a dros y blynyddoedd bu nifer o ail brintiadau. ...
  • 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 ...
  • Morgan, H.; Habbal, S. R. (2007-04-03)
    Fan streamers are often observed at low to mid latitudes in the corona at solar maximum, appearing narrow in latitudinal extent near the Sun, and fanning out with height, adopting an approximately linear, but not necessarily ...
  • 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 ...
  • Wallis, D.; Burchell, M. J.; Cook, Anthony; Solomon, C. J. (2005-05)
    Planetary impact craters have a high degree of radial symmetry. This hampers efforts to identify the azimuthal impact direction for most craters – the radially symmetric component of an impact crater swamps any asymmetries ...
  • 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 ...
  • 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 ...

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