Now showing items 198-217 of 2371

  • Blowout bifurcation in a system of coupled chaotic lasers 

    Ashwin, Peter; Terry, John R.; Thornburg, K. Scott; Roy, Rajarshi (American Physical Society, 1998)
    We show that loss of synchronization of two identical coupled chaotic class B lasers can occur via a blowout bifurcation. This occurs when a transverse Lyapunov exponent governing the stability of a synchronized subspace ...
  • Blue, surface-emitting, distributed feedback polyfluorene lasers 

    Heliotis, G.; Xia, R.; Bradley, D. D. C.; Turnbull, G. A.; Samuel, I. D. W.; Andrew, P.; Barnes, William L. (American Institute of Physics, 2003)
    We report the fabrication of optically-pumped solid-state distributed feedback lasers utilizing two blue-light-emitting semiconducting polyfluorenes as gain media. The lasers were readily fabricated by solution deposition ...
  • Boundary-layer effects on acoustic transmission through narrow slit cavities 

    Ward, GP; Lovelock, RK; Murray, AR; Hibbins, Alastair P.; Sambles, J. Roy; Smith, JD (American Physical Society, 2015-07-21)
    We explore the slit-width dependence of the resonant transmission of sound in air through both a slit array formed of aluminum slats and a single open-ended slit cavity in an aluminum plate. Our experimental results accord ...
  • Bounded real and positive real balanced truncation for infinite-dimensional systems 

    Guiver, Chris; Opmeer, Mark R. (American Institute of Mathematical Sciences, 2013)
    Bounded real balanced truncation for infinite-dimensional systems is considered. This provides reduced order finite-dimensional systems that retain bounded realness. We obtain an error bound analogous to the finite-dimensional ...
  • Bounds on the dynamics of sink populations with noisy immigration 

    Eager, Eric Alan; Guiver, Chris; Hodgson, David J.; Rebarber, Richard; Stott, Iain; Townley, Stuart (Elsevier, 2014)
    Sink populations are doomed to decline to extinction in the absence of immigration. The dynamics of sink populations are not easily modelled using the standard framework of per capita rates of immigration, because numbers ...
  • Highway bridge live loading assessment and load carrying estimation using a health monitoring system 

    Moyo, P; Brownjohn, James; Omenzetter, P (Institution of Civil Engineers, 2015)
    The Land Transport Authority of Singapore has a continuing program of highway bridge upgrading, to refurbish and strengthen bridges to allow for increasing vehicle traffic and increasing axle loads. One subject of this ...
  • Bridge structural condition assessment using systematically validated finite-element model 

    Xia, Pin-Qi; Brownjohn, James (American Society of Civil Engineers, 2004-09)
    Structural condition assessment of highway bridges is largely based on visual observations described by subjective indices, and it is necessary to develop methodology for accurate and reliable condition assessment of ...
  • Brillouin scattering study on the single-crystal elastic properties of natrolite and analcime zeolites 

    Sanchez-Valle, Carmen; Sinogeikin, Stanislav V.; Lethbridge, Zoe A. D.; Walton, Richard I.; Smith, Christopher W.; Evans, Kenneth E.; Bass, Jay D. (American Institute of Physics, 2005)
    The Brillouin light-scattering technique was used to investigate the single-crystal elastic properties of two aluminosilicate zeolites, natrolite (NAT) and analcime (ANA), at ambient conditions. An inversion of the acoustic ...
  • Brillouin spectroscopy applied to protein fibers of the extracellular matrix 

    Edginton, RS; Mattana, S; Caponi, S; Fioretto, D; Green, E; Winlove, CP; Palombo, F (Journal of Visualized Experiments (JoVE), 2016)
    Brillouin spectroscopy is an emerging technique in the biomedical field. It probes the mechanical properties of a sample through the interaction of visible light with thermally induced acoustic waves or phonons propagating ...
  • Broad range of 2050 warming from an observationally constrained large climate model ensemble 

    Rowlands, Daniel J.; Frame, David J.; Ackerley, Duncan; Aina, Tolu; Booth, Ben B.B.; Christensen, Carl; Collins, Matthew; Faull, Nicholas; Forest, Chris E.; Grandey, Benjamin S.; Gryspeerdt, Edward; Highwood, Eleanor J.; Ingram, William J.; Knight, Sylvia; Lopez, Ana; Massey, Neil; McNamara, Frances; Meinshausen, Nicolai; Piani, Claudio; Rosier, Suzanne M.; Sanderson, Benjamin M.; Smith, Leonard A.; Stone, Daithi A.; hurston, Milo; Yamazaki, Kuniko; Yamazak, Y. Hiro; Allen, Myles R. (Nature Publishing Group, 2012)
    Incomplete understanding of three aspects of the climate system—equilibrium climate sensitivity, rate of ocean heat uptake and historical aerosol forcing—and the physical processes underlying them lead to uncertainties in ...
  • Broad-band polarization conversion from a finite periodic structure in the microwave regime 

    Hallam, B. T.; Lawrence, Christopher R.; Hooper, Ian R.; Sambles, J. Roy (American Institute of Physics, 2004)
    A reflection grating demonstrating extraordinarily broad-band polarization conversion in a nondiffractive regime has been studied at microwave frequencies. This single-element structure has been fabricated by electrolessly ...
  • Broadband and broadangle extraordinary acoustic transmission through subwavelength apertures surrounded by fluids 

    Carretero-Palacios, S.; Murray, Alasdair R.J.; Martín-Moreno, L.; Hibbins, Alastair P. (IOP Publishing for Deutsche Physikalische Gesellschaft, 2014)
    We present a mechanism for ultra-broadband transmission of acoustic waves through subwavelength hole arrays. Different fluids surrounding (or filling) the holes are considered, which allows tuning of the band of maximum ...
  • Broadband and efficient plasmonic control in the near-infrared and visible via strong interference of surface plasmon polaritons 

    Gan, C.H.; Nash, Geoffrey R. (Optical Society of America, 2013)
    Broadband and tunable control of surface plasmon polaritons in the near-infrared and visible spectrum is demonstrated theoretically and numerically with a pair of phased nanoslits. We establish, with simulations supported ...
  • Broadband and low loss high refractive index metamaterials in the microwave regime 

    Campbell, T.; Hibbins, Alastair P.; Sambles, J. Roy; Hooper, Ian R. (American Institute of Physics, 2013)
    A broadband, low-loss, isotropic, high refractive index metamaterial comprising an array of close-packed cubic elements of cross-linked square metal plates is demonstrated in the microwave regime. The structuring of the ...
  • Broadband impedance-matched electromagnetic structured ferrite composite in the megahertz range 

    Parke, L.; Youngs, I.J.; Hibbins, Alastair P.; Sambles, J. Roy (American Institute of Physics (AIP), 2014)
    A high refractive-index structured ferrite composite is designed to experimentally demonstrate broadband impedance matching to free-space. It consists of an array of ferrite cubes that are anisotropically spaced, thereby ...
  • Brown dwarfs and very low mass stars in the Hyades cluster : a dynamically evolved mass function 

    Bouvier, Jerome; Kendall, T.R.; Meeus, G.; Testi, L.; Moraux, E.; Stauffer, J.R.; James, D.; Cuillandre, J.C.; Irwin, J.; McCaughrean, M.J.; Baraffe, I.; Bertin, E. (EDP Sciences for European Southern Observatory (ESO), 2008)
    We conducted a search for brown dwarfs (BDs) and very low mass (VLM) stars in the 625 Myr-old Hyades cluster in order to derive the cluster's mass function across the stellar-substellar boundary. We performed a deep (I=23, ...
  • BSim: an agent-based tool for modeling bacterial populations in systems and synthetic biology. 

    Gorochowski, TE; Matyjaszkiewicz, Antoni; Todd, T; Oak, N; Kowalska, K; Reid, S; Tsaneva-Atanasova, Krasimira; Savery, NJ; Grierson, CS; Di Bernardo, Mario (Public Library of Science (PLoS), 2012)
    Large-scale collective behaviors such as synchronization and coordination spontaneously arise in many bacterial populations. With systems biology attempting to understand these phenomena, and synthetic biology opening up ...
  • Buckling behavior of carbon nanotubes under bending: from ripple to kink 

    Wang, CG; Liu, YP; Al-Ghalith, J; Dumitrică, T; Wadee, M. Khurram; Tan, HF (Elsevier, 2016-06)
    This paper elucidates the buckling behavior of carbon nanotubes (CNTs) under bending. CNTs are modeled as continuous thin-wall circular tubes, and their buckling is governed by equations that take into account of the ...
  • Buckling of scroll waves 

    Dierckx, H.; Verschelde, H.; Selsil, O.; Biktashev, V. N. (American Physical Society, 2012)
    A scroll wave in a sufficiently thin layer of an excitable medium with negative filament tension can be stable nevertheless due to filament rigidity. Above a certain critical thickness of the medium, such scroll wave will ...
  • The Build-up to Eruptive Solar Events Viewed as the Development of Chiral Systems 

    Martin, Sara F.; Panasenco, Olga; Berger, M.A.; Engvold, Oddbjorn; Lin, Yong; Pevtsov, Alexei A.; Srivastava, Nandita (Astronomical Society of the Pacific, 2012)
    When we examine the chirality or observed handedness of the chromospheric and coronal structures involved in the long-term build-up to eruptive events, we find that they evolve in very specific ways to form two and only ...