Browsing Department of Materials Science and Metallurgy by Title

Now showing items 569-588 of 648

  • The power spectrum and bispectrum of inflation and cosmic defects 

    Lazanu, Andrei (University of CambridgeDepartment of Applied Mathematics and Theoretical PhysicsGonville and Caius College, 2016-06-28)
    Much of the recent progress in cosmology has come from studying the power spectrum of the cosmic microwave background (CMB). The latest results from the Planck satellite confirmed that the inflationary paradigm with the ...

  • 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 ...

  • The quasi-fixed Minimal Supersymmetric Standard Model 

    Abel, SA; Allanach, Benjamin Christopher (Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 1997-12-25)

  • The radiative role of ozone and water vapour in the annual temperature cycle in the tropical tropopause layer 

    Ming, Alison; Maycock, AC; Hitchcock, P; Haynes, Peter Howard (Atmospheric Chemistry and Physics, 2017-05-08)
    © Author(s) 2017. The structure and amplitude of the radiative contributions of the annual cycles in ozone and water vapour to the prominent annual cycle in temperatures in the tropical tropopause layer (TTL) are considered. ...

  • The relationship between a strip Wiener--Hopf problem and a line Riemann--Hilbert problem 

    Kisil, Anastasia (OUPIMA Journal of Applied Mathematics, 2015-03-31)
    In this paper, the Wiener–Hopf factorization problem is presented in a unified framework with the Riemann–Hilbert factorization. This allows to establish the exact relationship between the two types of factorization. In ...

  • The relaxation time for viscous and porous gravity currents following a change in flux 

    Ball, Thomasina; Huppert, Herbert Eric; Lister, John Ronald; Neufeld, Jerome Anthony (Cambridge University PressJournal of Fluid Mechanics, 2017-06-01)
    The equilibration time in response to a change in flux from Q to $\Lambda$Q after an injection period applied to either a low-Reynolds-number gravity current or one propagating through a porous medium, in both axisymmetric ...

  • The resonant π+γ → π+π⁰ amplitude from Quantum Chromodynamics 

    Briceño, Raúl A; Dudek, Jozef J; Edwards, Robert G; Schultz, Christian J; Thomas, Christopher Edward; Wilson, David John (APSPhysical Review Letters, 2015-12-08)
    We present the first ab initio calculation of a radiative transition of a hadronic resonance within Quantum Chromodynamics (QCD). We compute the amplitude for ππ → πγ* , as a function of the energy of the ππ pair and the ...

  • The response of the lower stratosphere to zonally symmetric thermal and mechanical forcing. 

    Ming, Alison; Hitchcock, Adam Peter; Haynes, Peter Howard (American Meteorological SocietyJournal of the Atmospheric Sciences, 2016-04-15)
    The response of the atmosphere to zonally symmetric applied heating and mechanical forcing is considered, allowing for the fact that the response may include a change in the wave force (or ‘wave drag’). A scaling argument ...

  • The shape of bouncing universes 

    Barrow, John David; Ganguly, C
    What happens to the most general closed oscillating universes in general relativity? We sketch the development of interest in cyclic universes from the early work of Friedmann and Tolman to modern variations introduced by ...

  • The solar tachocline: a self-consistent model of magnetic confinement 

    Wood, Toby (University of CambridgeDepartment of Applied Mathematics and Theoretical PhysicsQueens' College, 2011-01-11)
    In this dissertation we consider the dynamics of the solar interior, with particular focus on angular momentum balance and magnetic field confinement within the tachocline. In Part I we review current knowledge of the ...

  • The stress–pressure relationship in simulations of MRI-induced turbulence 

    Ross, Johnathan; Latter, Henrik Nils; Guilet, Jerome (Oxford University PressMonthly Notices of the Royal Astronomical Society, 2016-01-01)
    We determine how MRI (magnetorotational instability)-turbulent stresses depend on gas pressure via a suite of unstratified shearing box simulations. Earlier numerical work reported only a very weak dependence at best, ...

  • The structure and origin of confined Holmboe waves 

    Lefauve, Adrien; Partridge, JL; Zhou, Q; Dalziel, Stuart Bruce; Caulfield, Colm-cille Patrick; Linden, Paul Frederick (Cambridge University PressJournal of Fluid Mechanics, 2018-08-10)
    Finite-amplitude manifestations of stratified shear flow instabilities and their spatio-temporal coherent structures are believed to play an important role in turbulent geophysical flows. Such shear flows commonly have ...

  • The structure and stability of vortices in astrophysical discs 

    Railton, Anna Dorothy (University of CambridgeDepartment of Applied Mathematics and Theoretical Physics, 2015-10-06)
    This thesis finds that vortex instabilities are not necessarily a barrier to their potential as sites for planetesimal formation. It is challenging to build planetesimals from dust within the lifetime of a protoplanetary disc ...

  • The structure of optimal parameters for image restoration problems 

    de, los Reyes JC; Schönlieb, CB; Valkonen, T (ElsevierJournal of Mathematical Analysis and Applications, 2015-09-16)
    We study the qualitative properties of optimal regularisation parameters in variational models for image restoration. The parameters are solutions of bilevel optimisation problems with the image restoration problem as ...

  • 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 ...

  • The third way to 3D gravity 

    Bergshoef, Eric; Merbis, Wout; Routh, Alasdair J; Townsend, Paul Kingsley (World ScientificInternational Journal of Modern Physics D, 2015-10-09)
    Consistency of Einstein’s gravitational field equation Gµν ∝ Tµν imposes a “conservation condition” on the T-tensor that is satisfied by (i) matter stress tensors, as a consequence of the matter equations of motion, and ...

  • Theories of binary fluid mixtures: from phase-separation kinetics to active emulsions 

    Cates, Michael Elmhirst; Tjhung, Elsen (Cambridge University PressJournal of Fluid Mechanics, 2017-12-18)
    Binary fluid mixtures are examples of complex fluids whose microstructure and flow are strongly coupled. For pairs of simple fluids, the microstructure consists of droplets or bicontinuous demixed domains and the physics ...

  • Theory of Shape-Shifting Droplets 

    Haas, Pierre; Goldstein, Raymond Ethan; Smoukov, Stoyan Kostadinov; Cholakova, D; Denkov, N (American Physical SocietyPhysical Review Letters, 2017-02-24)
    Recent studies of cooled oil emulsion droplets uncovered transformations into a host of flattened shapes with straight edges and sharp corners, driven by a partial phase transition of the bulk liquid phase. Here, we explore ...

  • Thermodynamic and hydrodynamic behaviour of interacting Fermi gases 

    Goulko, Olga (University of CambridgeDepartment of Applied Mathematics and Theoretical Physics, 2012-01-10)
    Fermionic matter is ubiquitous in nature, from the electrons in metals and semiconductors or the neutrons in the inner crust of neutron stars, to gases of fermionic atoms, like 40K or 6Li that can be created and studied ...

  • Thermodynamic instability of rotating black holes 

    Monteiro, R; Perry, Malcolm John; Santos, Jorge Eduardo (Physical Review D - Particles, Fields, Gravitation and Cosmology, 2009-08-06)