Cambridge University: Recent submissions
Now showing items 1081-1100 of 1268
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Asymptotics of Partial Density Functions for Divisors
(SpringerThe Journal of Geometric Analysis, 2016-09-19)We study the asymptotic behaviour of the partial density function associated to sections of a positive hermitian line bundle that vanish to a particular order along a fixed divisor $Y$ . Assuming the data in question is ...
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Unstable mode solutions to the Klein-Gordon equation in Kerr-anti-de Sitter spacetimes
(SpringerCommunications in Mathematical Physics, 2016)For any cosmological constant Λ = −3/$l^2$ < 0 and any $\alpha$ < 9/4, we find a Kerr-AdS spacetime ($M$, $g_{KAdS}$), in which the Klein-Gordon equation $\square g_{KAdS}$ ψ+$\alpha$/$l^2$ψ = 0 has an exponentially growing ...
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Isometric disks are holomorphic
(SpringerInventiones mathematicae, 2016-10-05)This paper shows that every totally-geodesic isometry from the unit disk to a finite-dimensional Teichmüller space for the intrinsic Kobayashi metric is either holomorphic or anti-holomorphic; in particular, it is a ...
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Impact of aperture separation on wind-driven single-sided natural ventilation
(ElsevierBuilding and Environment, 2016-11-01)This paper presents a study of the impact of horizontal aperture separation in single-sided ventilation flows with two apertures (SS2). The study is based on wind tunnel measurements and dimensional analysis. The results ...
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Pattern formation in chemically interacting active rotors with self-propulsion
(Royal Society of ChemistrySoft Matter, 2016-09-21)We demonstrate that active rotations in chemically signalling particles, such as autochemotactic $\textit{E. coli}$ close to walls, create a route for pattern formation based on a nonlinear yet deterministic instability ...
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Ten questions about natural ventilation of non-domestic buildings
(ElsevierBuilding and Environment, 2016-10)Throughout history, natural ventilation has remained the preferred choice for the majority of residential buildings, while, in commercial buildings, natural ventilation went from being the single option to somewhat of a ...
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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 ...
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Optimized finite-difference (DRP) schemes perform poorly for decaying or growing oscillations
(ElsevierJournal of Computational Physics, 2016-08-11)Computational aeroacoustics often use finite difference schemes optimized to require relatively few points per wavelength; such optimized schemes are often called Dispersion Relation Preserving (DRP). Similar techniques ...
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On the survival of zombie vortices in protoplanetary discs
(Oxford University PressMonthly Notices of the Royal Astronomical Society, 2016-09-06)Recently it has been proposed that the zombie vortex instability (ZVI) could precipitate hydrodynamical activity and angular momentum transport in unmagnetized regions of protoplanetary discs, also known as ‘dead zones’. ...
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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 ...
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Nonhyperbolic free-by-cyclic and one-relator groups
(New York Journal of MathematicsNew York Journal of Mathematicshttp://nyjm.albany.edu/j/2016/22-35.html, 2016-08-01)We show that the free-by-cyclic groups of the form $F_2$ $\rtimes$ $\Bbb Z$ act properly cocompactly on CAT(0) square complexes. We also show using generalized Baumslag–Solitar groups that all known groups defined by a ...
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How old are you, really? Communicating chronic risk through ‘effective age’ of your body and organs
(BioMed CentralBMC Medical Informatics and Decision Making, 2016-08-05)In communicating chronic risks, there is increasing use of a metaphor that can be termed ‘effective-age’: the age of a ‘healthy’ person who has the same risk profile as the individual in question. Popular measures include ...
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Universal Charge Diffusion and the Butterfly Effect in Holographic Theories
(American Physical SocietyPhysical Review Letters, 2016-08-23)We study charge diffusion in holographic scaling theories with a particle-hole symmetry. We show that these theories have a universal regime in which the diffusion constant is given by D$_{c}$ = Cv$^{2}$$_{B}$/(2πT), where ...
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Matrix model for non-Abelian quantum Hall states
(American Physical SocietyPhysical Review B, 2016-08-09)We propose a matrix quantum mechanics for a class of non-Abelian quantum Hall states. The model describes electrons which carry an internal SU($p$) spin. The ground states of the matrix model include spin-singlet generalizations ...
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A matrix model for WZW
(SpringerJournal of High Energy Physics, 2016-08-01)We study a U($\small N$) gauged matrix quantum mechanics which, in the large $\small N$ limit, is closely related to the chiral WZW conformal field theory. This manifests itself in two ways. First, we construct the left-moving ...
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Tunable shear thickening in suspensions
(National Academy of SciencesProceedings of the National Academy of Sciences, 2016-09-12)Shear thickening, an increase of viscosity with shear rate, is a ubiquitous phenomenon in suspended materials that has implications for broad technological applications. Controlling this thickening behavior remains a major ...
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Sensing in the Mouth: A Model for Filiform Papillae as Strain Amplifiers
(FrontiersFrontiers in Physics, 2016-08-23)Texture perception of foods is a common yet remarkably unstudied biophysical problem. Motivated by recent experiments reporting the presence of corpuscular endings in tongue filiform papillae, we develop in this work a ...
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First integrals of affine connections and Hamiltonian systems of hydrodynamic type
(Oxford University PressJournal of Integrable Systems, 2016-12-23)We find necessary and sufficient conditions for a local geodesic flow of an affine connection on a surface to admit a linear first integral. The conditions are expressed in terms of two scalar invariants of differential ...
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The greedy basis equals the theta basis: A rank two haiku
(ElsevierJournal of Combinatorial Theory Series A, 2016-08-26)We prove the equality of two canonical bases of a rank 2 cluster algebra, the greedy basis of Lee–Li–Zelevinsky and the theta basis of Gross–Hacking–Keel–Kontsevich.
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Handbook of Big Data [Book review]
(WileyStatistics in Medicine, 2016-12-01)
