African University of Science and Technology: Recent submissions

Now showing items 581-600 of 4827

  • Acoustic Scattering by a Finite Rigid Plate with a Poroelastic Extension 

    Ayton, Lorna Jane (Cambridge University PressJournal of Fluid Mechanics, 2016-02-24)
    The scattering of sound by a finite rigid plate with a finite poroelastic extension interacting with an unsteady acoustic source is investigated to determine the effects of porosity, elasticity, and the length of the ...

  • Research data supporting "Diffusion tensor imaging with deterministic error bounds" 

    Gorokh, Artur; Korolev, Yury; Valkonen, Tuomo (2016-01-22)

  • Three-dimensional flow in Kupffer's Vesicle 

    Montenegro-Johnson, Thomas Douglas; Baker, DI; Smith, DJ; Lopes, SS (SpringerJournal of Mathematical Biology, 2016-01-29)
    Whilst many vertebrates appear externally left-right symmetric, the arrangement of internal organs is asymmetric. In zebrafish, the breaking of left-right symmetry is organised by Kupffer’s Vesicle (KV): an approximately ...

  • Using stratification to mitigate end-effects in quasi-Keplerian Taylor-Couette flow 

    Leclercq, Colin; Partridge, Jamie L; Augier, Pierre; Dalziel, Stuart Bruce; Kerswell, Richard Rodney (Cambridge University PressJournal of Fluid Mechanics, 2016-02-24)
    Efforts to model accretion disks in the laboratory using Taylor–Couette flow apparatus are plagued with problems due to the substantial impact the end-plates have on the flow. We explore the possibility of mitigating the ...

  • Research data supporting: "Using stratification to mitigate end-effects in quasi-Keplerian Taylor-Couette flow" 

    Leclercq, Colin; Partridge, Jamie. L.; Augier, Pierre; Dalziel, Stuart B.; Kerswell, Rich. R. (2016-01-19)

  • Gravity-dominated unequal-mass black hole collisions 

    Sperhake, Ulrich; Berti, Emanuele; Cardoso, Vitor; Pretorius, Frans (APSPhysical Review D, 2016-02-04)
    We continue our series of studies of high-energy collisions of black holes investigating unequalmass, boosted head-on collisions in four dimensions. We show that the fraction of the center-of-mass energy radiated as ...

  • Twistors and the massive spinning particle 

    Mezincescu, Luca; Routh, Alasdair J; Townsend, Paul Kingsley (IOP ScienceJournal of Physics A: Mathematical and Theoretical, 2015-12-07)
    Gauge-invariant twistor variables are found for the massive spinning particle with N-extended local worldline supersymmetry, in spacetime dimensions D = 3, 4, 6. The twistor action is manifestly Lorentz invariant but the ...

  • Motility of Colonial Choanoflagellates and the Statistics of Aggregate Random Walkers 

    Kirkegaard, Julius Bier; Marron, Alan Oliver; Goldstein, Raymond Ethan (American Physical SocietyPhysical Review Letters, 2016-01-22)
    We illuminate the nature of the three-dimensional random walks of microorganisms composed of individual organisms adhered together. Such aggregate random walkers are typified by choanoflagellates, eukaryotes that are the ...

  • Exploiting the Feller Coupling for the Ewens Sampling Formula 

    Arratia, Richard; Barbour, AD; Tavaré, Simon (Institute of Mathematical StatisticsStatistical Science, 2016-02-10)

  • Convective mass transfer from a submerged drop in a thin falling film 

    Landel, Julien R; Thomas, AL; McEvoy, H; Dalziel, Stuart Bruce (Cambridge University PressJournal of Fluid Mechanics, 2016-01-25)
    We study the fluid mechanics of removing a passive tracer contained in small, viscous drops attached to a flat inclined substrate using thin gravity-driven film flows. A convective mass transfer establishes across the ...

  • Periodization, translation, prescription and the emergence of Classical French 

    Ayres-Bennett, Wendy Margaret; Caron, Philippe (WileyTransactions of the Philological Society, 2016-03-17)
    In this article we demonstrate how fine-grained analysis of salient features of linguistic change over a relatively short, but significant period can help refine our notions of periodization. As our case study, we consider ...

  • The synthesis of di-carboxylate esters using continuous flow vortex fluidics 

    Britton, Joshua; Dalziel, Stuart Bruce; Raston, Colin L (Royal Society of ChemistryGreen Chemistry, 2015-12-01)
    A vortex fluidic device (VFD) is effective in mediating the synthesis of di-esters at room temperature. Processing under ambient conditions allows for a simple and efficient synthesis, whilst operating under continuous ...

  • Vortices and Monopoles in a Harmonic Trap 

    Tong, David; Turner, Carl (SpringerJournal of High Energy Physics, 2015-12-15)
    The Ω-deformation is a harmonic trap, penning certain excitations near the origin in a manner consistent with supersymmetry. Here we explore the dynamics of BPS monopoles and vortices in such a trap. We pay particular ...

  • Dependence on aspect ratio of symmetry breaking for oscillating foils: implications for flapping flight 

    Deng, Jian; Caulfield, Colm-cille Patrick (Cambridge University PressJournal of Fluid Mechanics, 2015-12-07)
    Using two-dimensional direct numerical simulations, we investigate the flow in a fluid of kinematic viscosity ν and density ρ around elliptical foils of density ρ_s with major axis c and minor axis b for three different ...

  • The Quantum Hall Effect in Supersymmetric Chern-Simons Theories 

    Tong, David; Turner, Carl (APSPhysical Review B, 2015-12-15)
    We introduce a supersymmetric Chern-Simons theory whose low energy physics is that of the fractional quantum Hall effect. The supersymmetry allows us to solve the theory analytically. We quantise the vortices and, by ...

  • Dynamics of buoyant releases in confined spaces. 

    Barnett, Steven John. (University of CambridgeDepartment of Applied Mathematics and Theoretical Physics, 1992-01-28)
    The flows that may result from the release of a buoyant fluid from a small source in a confined space are varied and complex, depending on the source characteristics, the confining geometry and container ventilation. ...

  • Graviton time delay and a speed limit for small black holes in Einstein-Gauss-Bonnet theory 

    Papallo, Giuseppe; Reall, Harvey Stephen (SpringerJournal of High Energy Physics, 2015-11-17)
    Camanho, Edelstein, Maldacena and Zhiboedov have shown that gravitons can experience a negative Shapiro time delay, i.e. a time advance, in Einstein-Gauss-Bonnet theory. They studied gravitons propagating in singular ...

  • Geometric algebra and its application to mathematical physics 

    Doran, Christopher John Leslie (University of CambridgeDepartment of Applied Mathematics and Theoretical Physics, 1994)

  • Elasticity and Glocality: Initiation of Embryonic Inversion in Volvox 

    Haas, Pierre; Goldstien, Raymond E (Royal Society PublishingJournal of the Royal Society Interface, 2015-10-21)
    Elastic objects across a wide range of scales deform under local changes of their intrinsic properties, yet the shapes are glocal, set by a complicated balance between local properties and global geometric constraints. ...

  • Disruption of SSP/VWI states by a stable stratification 

    Eaves, TS; Caulfield, Colm-cille Patrick (Cambridge University PressJournal of Fluid Mechanics, 2015-11-06)
    We identify ‘minimal seeds’ for turbulence, i.e. initial conditions of the smallest possible total perturbation energy density Ec that trigger turbulence from the laminar state, in stratified plane Couette flow, the flow ...