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Higher order corrections and unification in the minimal supersymmetric standard model: SOFTSUSY3.5
(ElsevierComputer Physics Communications, 2014-12-18)
We explore the effects of three-loop minimal supersymmetric standard model renormalisation group equation terms and some leading two-loop threshold corrections on gauge and Yukawa unification: each being one loop higher ...
Efficient mixing in stratified flows: experimental study of a Rayleigh-Taylor unstable interface within an otherwise stable stratification
(Cambridge University PressJournal of Fluid Mechanics, 2014-09-09)
Boussinesq salt-water laboratory experiments of Rayleigh–Taylor instability (RTI) can achieve mixing efficiencies greater than 0.75 when the unstable interface is confined between two stable stratifications. This is much ...
On the thermodynamic boundary conditions of a solidifying mushy layer with outflow
(CUPJournal of Fluid Mechanics, 2014-11-27)
The free-boundary problem between a liquid region and a mushy layer (a reactive porous medium) must respect both thermodynamic and fluid dynamical considerations. We develop a steady two-dimensional forced-flow configuration ...
A physically based parameterization of gravity drainage for sea-ice modelling
(Wiley on behalf of the American Geophysical UnionJournal of Geophysical Research: Oceans, 2014-09-02)
We incorporate a physically derived parameterization of gravity drainage,
in terms of a convective upwelling velocity, into a one-dimensional, thermodynamic sea-
ice model of the kind currently used in coupled climate ...
Excitations in superfluids of atoms and polaritons
(University of CambridgeDepartment of Pure Mathematics and Mathematical StatisticsSt. Edmund's College, 2014-11-11)
This thesis is devoted to the study of excitations in atomic and polariton Bose-Einstein condensates (BEC). These two specimens are prime examples for equilibrium and non equilibrium BEC. The corresponding condensate wave ...
Random Intersection Trees
(JMLRJournal of Machine Learning Research, 2014-02)
Finding interactions between variables in large and high-dimensional datasets is often a serious computational challenge. Most approaches build up interaction sets incrementally, adding variables in a greedy fashion. The ...
Estimate nothing
(Taylor & FrancisQuantitative Finance, 2014)
In the econometrics of financial time series, it is customary to take some parametric model for the data, and then estimate the parameters from historical data. This approach suffers from several problems. Firstly, how is ...
An explicit upper bound for the Helfgott delta in SL(2,p)
(ElsevierJournal of Algebra, 2014-09-23)
Helfgott proved that there exists a δ > 0 such that if S is a symmetric generating subset of SL(2, p)containing 1 then either S^3=SL(2, p)or |S^3| ≥|S|^1+ δ. It is known that δ ≥ 1/3024. Here we show that δ ≤ (log_2 (7) ...
Investing and stopping
(Applied Probability TrustJournal of Applied Probability, 2014)
In this paper we solve the hedge fund manager’s optimization problem in a model that allows for investors to enter and leave the fund over time depending on its performance. The manager’s payoff at the end of the year will ...