Browsing Mathematics by Title
Now showing items 3958 of 840

The Arctic predictability and prediction on seasonaltointerannual timescales (APPOSITE) data set version 1
Recent decades have seen significant developments in seasonaltointerannual timescale climate prediction capabilities. However, until recently the potential of such systems to predict Arctic climate had not been assessed. ... 
Are changes in global precipitation constrained by the tropospheric energy budget?
(American Meteorological Society, 2009)A tropospheric energy budget argument is used to analyze twentiethcentury precipitation changes. It is found that global and oceanmean general circulation model (GCM) precipitation changes can be understood as being due ... 
Are large submarine landslides temporally random or do uncertainties in available age constraints make it impossible to tell?
(Elsevier, 20150729)© 2015. Large (>1km3) submarine landslides can potentially generate very destructive tsunamis and damage expensive sea floor infrastructure. It is therefore important to understand their frequency and triggers, and whether ... 
The art and science of climate model tuning
(American Meteorological Society, 20161108)We survey the rationale and diversity of approaches for tuning, a fundamental aspect of climate modeling which should be more systematically documented and taken into account in multimodel analysis. The process of ... 
Assessing dengue vaccination impact: Model challenges and future directions.
(Elsevier, 20160725)In response to the sharp rise in the global burden caused by dengue virus (DENV) over the last few decades, the WHO has set out three specific key objectives in its disease control strategy: (i) to estimate the true burden ... 
Assessing risk profiles for Salmonella serotypes in breeding pig operations in Portugal using a Bayesian hierarchical model
(BioMed Central, 20121121)BACKGROUND: The EU Regulation No 2160/2003 imposes a reduction in the prevalence of Salmonella in pigs. The efficiency of control programmes for Salmonella in pigs, reported among the EU Member States, varies and definitive ... 
Assessing rotationinvariant feature classification for automated wildebeest population counts
(Public Library of Science, 20160526)Accurate and ondemand animal population counts are the holy grail for wildlife conservation organizations throughout the world because they enable fast and responsive adaptive management policies. While the collection of ... 
Assessing the burden of pregnancyassociated malaria under changing transmission settings
(BioMed Central, 20091028)BACKGROUND: The clinical presentation of pregnancyassociated malaria, or PAM, depends crucially on the particular epidemiological settings. This can potentially lead to an underestimation of its overall burden on the ... 
Assessing the significance of changes in ENSO amplitude using variance metrics
(American Meteorological Society, 20140101)The variance of time series records relating to ENSO, such as the interannual anomalies or bandpass filtered components of equatorial Pacific SST indices, provides one approach to quantifying changes in ENSO amplitude. ... 
Asymmetry of magnetosheath flows and magnetopause shape during low Alfven Mach number solar wind
(American Geophysical Union (AGU), 2013)Previous works have emphasized the significant influence of the solar wind Alfvén Mach number (MA) on magnetospheric dynamics. Here we report statistical, observational results that pertain to changes in the magnetosheath ... 
Asymptotic analysis and analytical solutions of a model of cardiac excitation.
(Springer Verlag, 2008)We describe an asymptotic approach to gated ionic models of singlecell cardiac excitability. It has a form essentially different from the Tikhonov fastslow form assumed in standard asymptotic reductions of excitable ... 
Asymptotic and numerical solutions of the initial value problem in rotating planetary fluid cores
(Oxford University Press / Royal Astronomical Society, 2010)An initial state of fluid motion in planetary cores or atmospheres, excited, for example, by the giant impact of an asteroid or an earthquake and then damped by viscous dissipation, decays towards the state of rigidbody ... 
An asymptotic parallelintime method for highly oscillatory PDEs
(Society for Industrial and Applied Mathematics, 20130326)We present a new timestepping algorithm for nonlinear PDEs that exhibit scale separation in time. Our scheme combines asymptotic techniques (which are inexpensive but can have insufficient accuracy) with parallelintime ... 
Asymptotic properties of mathematical models of excitability.
(Royal Society, 2006)We analyse small parameters in selected models of biological excitability, including HodgkinHuxley (Hodgkin & Huxley 1952 J. Physiol.117, 500544) model of nerve axon, Noble (Noble 1962 J. Physiol.160, 317352) model of ... 
Asymptotic theory for torsional convection in rotating fluid spheres
(Cambridge University Press, 20170119)This paper is concerned with the classical, wellstudied problem of convective instabilities in rapidly rotating, selfgravitating, internally heated Boussinesq fluid spheres. Sanchez et al. (J. Fluid Mech., vol. 791, 2016, ... 
Asymptotic theory of resonant flow in a spheroidal cavity driven by latitudinal libration
(Cambridge University Press, 2012) 
Asymptotics of conduction velocity restitution in models of electrical excitation in the heart.
(Springer Verlag, 2011)We extend a nonTikhonov asymptotic embedding, proposed earlier, for calculation of conduction velocity restitution curves in ionic models of cardiac excitability. Conduction velocity restitution is the simplest nontrivial ... 
Asynchronous Networks and Event Driven Dynamics
(IOP Publishing, 20170106)Realworld networks in technology, engineering and biology often exhibit dynamics that cannot be adequately reproduced using network models given by smooth dynamical systems and a fixed network topology. Asynchronous ... 
Asynchronous Networks: Modularization of Dynamics Theorem
(IOP Publishing, 20170106)Building on the first part of this paper, we develop the theory of functional asynchronous networks. We show that a large class of functional asynchronous networks can be (uniquely) represented as feedforward networks ... 
Atmospheric impacts of Arctic seaice loss, 19792009: separating forced change from atmospheric internal variability
(SpringerVerlag, 2013)The ongoing loss of Arctic seaice cover has implications for the wider climate system. The detection and importance of the atmospheric impacts of seaice loss depends, in part, on the relative magnitudes of the seaice ...