Search
Now showing items 1111-1120 of 1850
Zonal flow evolution and overstability in accretion discs
(Oxford University PressMonthly Notices of the Royal Astronomical Society, 2017-04-01)
This work presents a linear analytical calculation on the stability and evolution of a compressible, viscous self-gravitating (SG) Keplerian disc with both horizontal thermal diffusion and a constant cooling time-scale ...
Helical propulsion in shear-thinning fluids
(Cambridge University PressJournal of Fluid Mechanics, 2017-02-01)
Swimming micro-organisms often have to propel themselves in complex non-Newtonian fluids. We carry out experiments with self-propelling helical swimmers driven by an externally rotating magnetic field in shear-thinning ...
Worldline CPT and massless supermultiplets
(World Scientific PublishingInternational Journal of Modern Physics A, 2016-09-30)
The action for a massless particle in 4D Minkowski space–time has a worldline-time reversing symmetry corresponding to CPT invariance of the quantum theory. The analogous symmetry of the $\mathscr{N}$-extended superparticle ...
Can phoretic particles swim in two dimensions?
(American Physical SocietyPhysical Review E, 2016-12-16)
Artificial phoretic particles swim using self-generated gradients in chemical species (self-diffusiophoresis) or charges and currents (self-electrophoresis). These particles can be used to study the physics of collective ...
Isoscalar ππ Scattering and the σ Meson Resonance from QCD
(American Physical SocietyPhysical Review Letters, 2017-01-13)
We present for the first time a determination of the energy dependence of the isoscalar ππ elastic scattering phase shift within a first-principles numerical lattice approach to QCD. Hadronic correlation functions are ...
Microscale flow dynamics of ribbons and sheets
(Royal Society of ChemistrySoft Matter, 2017-01-18)
Numerical study of the hydrodynamics of thin sheets and ribbons presents difficulties associated with resolving multiple length scales. To circumvent these difficulties, asymptotic methods have been developed to describe ...
Classification and Reconstruction of High-Dimensional Signals from Low-Dimensional Features in the Presence of Side Information
(IEEEIEEE Transactions on Information Theory, 2016-09-07)
This paper offers a characterization of fundamental limits on the classification and reconstruction of high-dimensional signals from low-dimensional features, in the presence of side information. We consider a scenario ...
Media Query Processing for the Internet-of-Things: Coupling of Device Energy Consumption and Cloud Infrastructure Billing
(IEEEIEEE Transactions on Multimedia, 2016-12-01)
Audio/visual recognition and retrieval applications have recently garnered significant attention within Internet-of-Things (IoT) oriented services, given that video cameras and audio processing chipsets are now ubiquitous ...
Coherent structures in interacting vortex rings
(American Physical SocietyPhysical Review Fluids, 2017-02-21)
We investigate experimentally the nonlinear structures that develop from interacting vortex rings induced by a sinusoidally oscillating ellipsoidal disk in fluid at rest. We vary the scaled amplitude or Keulegan-Carpenter ...
Questioning the Mpemba effect: hot water does not cool more quickly than cold
(Nature Publishing GroupScientific Reports, 2016-11-24)
The Mpemba effect is the name given to the assertion that it is quicker to cool water to a given temperature when the initial temperature is higher. This assertion seems counter-intuitive and yet references to the effect ...