Now showing items 81-100 of 2371

  • Analytically Solvable Asymptotic Model of Atrial Excitability 

    Simitev, R. D.; Biktashev, V. N. (2009-05-25)
    We report a three-variable simplified model of excitation fronts in human atrial tissue. The model is derived by novel asymptotic techniques \new{from the biophysically realistic model of Courtemanche et al (1998) in ...
  • The ancient heritage of water ice in the solar system 

    Cleeves, L. Ilsedore; Bergin, Edwin A.; Alexander, Conel M. O’D.; Du, Fujun; Graninger, Dawn; Oberg, Karin I.; Harries, Tim J. (American Association for the Advancement of Science, 2014)
    Identifying the source of Earth's water is central to understanding the origins of life-fostering environments and to assessing the prevalence of such environments in space. Water throughout the solar system exhibits ...
  • Angle-independent microwave absorption by ultrathin microcavity arrays 

    Brown, James R.; Hibbins, Alastair P.; Lockyear, Matthew J.; Lawrence, Christopher R.; Sambles, J. Roy (American Institute of Physics, 2008)
    The resonant absorption of microwave radiation by thin, two-dimensional microcavity arrays has been studied. Resonant modes associated with these structures, formed from copper-clad FR4 laminates, exhibit both an azimuthal ...
  • Angular momentum evolution of young low-mass stars and brown dwarfs: observations and theory 

    Bouvier, Jerome; Matt, Sean P.; Mohanty, Subhanjoy; Scholz, Aleks; Stassun, Keivan G.; Zanni, Claudio (University of Arizona Press, 2014)
    This chapter aims at providing the most complete review of both the emerging concepts and the latest observational results regarding the angular momentum evolution of young low-mass stars and brown dwarfs. In the time since ...
  • Anharmonic effects in the thermoelectric properties of PbTe 

    Al-Otaibi, J; Srivastava, G.P. (American Institute of Physics (AIP), 2014-07-28)
    In this work, we investigate the crystal anharmonic effects in the thermoelectric properties of n-type PbTe. The lattice thermal transport coefficient is computed by employing an isotropic continuum model for the dispersion ...
  • Anisotropic properties of riddled basins 

    Ashwin, Peter; Breakspear, Michael (Elsevier, 2001)
    We consider some general properties of chaotic attractors with riddled basins of attraction (basins with positive measure but open dense complements) in dynamical systems with symmetries. We investigate how a basin of ...
  • Anisotropic small-scale constraints on energy in rotating stratified turbulence 

    Kurien, Susan; Wingate, Beth; Taylor, Mark (European Physical Society, 2008-10)
    Rapidly rotating, stably stratified three-dimensional inviscid flows conserve both energy and potential enstrophy. We show that in such flows, the forward cascade of potential enstrophy imposes anisotropic constraints on ...
  • Anisotropy, damping and coherence of magnetization dynamics in a 10 µm square Ni81Fe19 element 

    Barman, A.; Kruglyak, V.V.; Hicken, R.J.; Kundrotaite, A.; Rahman, M. (American Institute of Physics, 2003)
    We have studied magnetization precession in a square Ni81Fe19 element, of 10 μm width, by time-resolved scanning Kerr effect microscopy. From the frequency of precession, we deduce a fourfold in-plane anisotropy of about ...
  • Ant Colony Optimisation for Exploring Logical Gene-Gene Associations in Genome Wide Association Studies. 

    Sapin, E; Keedwell, E; Frayling, TM (Copicentro Editorial, 2013)
    In this paper a search for the logical variants of gene-gene interactions in genome-wide association study (GWAS) data using ant colony optimisation is proposed. The method based on stochastic algorithms is tested on a ...
  • An Ant Colony Optimization and Tabu List Approach to the Detection of Gene-Gene Interactions in Genome-Wide Association Studies [Research Frontier] 

    Sapin, E; Keedwell, E; Frayling, T (Institute of Electrical and Electronics Engineers (IEEE), 2015-11-01)
    © 2015 IEEE. In this paper, a novel ant colony optimization and tabu list approach for the discovery of gene-gene interactions in genome-wide association study data is proposed. The method is tested on a number of diseases ...
  • Anthropogenic perturbation of the carbon fluxes from land to ocean 

    Regnier, P; Friedlingstein, P; Ciais, P; Mackenzie, FT; Gruber, N; Janssens, IA; Laruelle, GG; Lauerwald, R; Luyssaert, S; Andersson, AJ; Arndt, S; Arnosti, C; Borges, AV; Dale, AW; Gallego-Sala, Angela V.; Goddéris, Y; Goossens, N; Hartmann, J; Heinze, C; Ilyina, T; Joos, F; Larowe, DE; Leifeld, J; Meysman, FJR; Munhoven, G; Raymond, PA; Spahni, R; Suntharalingam, P; Thullner, M (Nature Publishing Group, 2013-06-09)
    A substantial amount of the atmospheric carbon taken up on land through photosynthesis and chemical weathering is transported laterally along the aquatic continuum from upland terrestrial ecosystems to the ocean. So far, ...
  • Anti-phase Signature of Flare Generated Transverse Loop Oscillation 

    White, R.S.; Verwichte, E.; Foullon, Claire (American Astronomical Society / IOP Publishing, 2013)
    Transverse loop oscillations observed by the Atmospheric Imaging Assembly instrument on the Solar Dynamics Observatory spacecraft are studied after an impulsive solar flare eruption on 2012 May 8. We have found that a ...
  • The antigenic evolution of influenza: drift or thrift? 

    Wikramaratna, Paul S.; Sandeman, Michi; Recker, Mario; Gupta, Sunetra (The Royal Society, 2013-03-19)
    It is commonly assumed that antibody responses against the influenza virus are polarized in the following manner: strong antibody responses are directed at highly variable antigenic epitopes, which consequently undergo ...
  • The antigenic switching network of Plasmodium falciparum and its implications for the immuno-epidemiology of malaria 

    Noble, Robert; Christodoulou, Zóe; Kyes, Sue; Pinches, Robert; Newbold, Chris I.; Recker, Mario (eLife Sciences Publications, 2013)
    Antigenic variation in the human malaria parasite Plasmodium falciparum involves sequential and mutually exclusive expression of members of the var multi-gene family and appears to follow a non-random pattern. In this ...
  • Anyon exciton revisited 

    Parfitt, D.G.W.; Portnoi, M.E. (2003)
    We review the main results of the anyon exciton model in light of recent criticism by Wojs and Quinn. We show that the appearance of fractionally charged anyon ions at the bottom of their numerically calculated excitation ...
  • Anyon exciton revisited: Exact solutions for a few-particle system 

    Parfitt, D.G.W.; Portnoi, M.E. (American Physical Society, 2003)
    The anyon exciton model is generalized to the case of a neutral exciton consisting of a valence hole and an arbitrary number N of fractionally charged quasielectrons (anyons). A complete set of exciton basis functions is ...
  • Anyon excitons 

    Rashba, E.I.; Portnoi, M.E. (American Physical Society, 1993)
    We propose a model of an anyon exciton consisting of a hole and several anyons, and apply it to the spectroscopy of an incompressible quantum liquid. Fractionalization of the electron charge makes properties of such entities ...
  • Application of an integrated geotechnical and topographic monitoring system in the Lorano marble quarry (Apuan Alps, Italy) 

    Salvini, R; Vanneschi, C; Riccucci, S; Francioni, M; Gullì, D (Elsevier, 2015-04-18)
    Accurate slope stability analysis is essential for human activity in high-risk geological contexts. This may, however, not be enough in the case of quarrying where the dynamic and evolving environment also requires effective ...
  • Application of cellular automata approach for fast flood simulation 

    Ghimire, Bidur; Chen, Albert S.; Djordjevic, Slobodan; Savic, Dragan (Centre for Water Systems, University of Exeter, 2011)
    The increasing pluvial flooding in many urban areas of the world has caused tremendous damage to societies and has drawn the attention of researchers to the development of a fast flood inundation model. Most available models ...
  • Application of ex vivo cryo-imaging technique for three-dimensional finite element analysis of atherosclerotic plaque rupture 

    Abdul-Aziz, Ahmad A.; Cotton, Ross; Richards, Simon; Faramarzalian, Ali; Young, Philippe G.; Chamie, Daniel; Wilson, David L.; Bezerra, Hiram G.; Costa, Marco A. (Society for Science and Education, United Kingdom, 2015-08-30)
    Cryo-imaging is an ex vivo vascular imaging modality that acquires serial 2D fluorescence and bright-field images at 20μm increments without sacrifice to tissue morphology. These features make Cryo-imaging an attractive ...