Browsing by Classification "QA"
Now showing items 4059 of 257

Coprime invariable generation and minimalexponent groups
(201508)  Journal articleA finite group G is coprimely invariably generated if there exists a set of generators {g1,. .,gu} of G with the property that the orders g1,. .,gu are pairwise coprime and that for all x1,. .,xu∈G the set {g1x1,. ... 
Copulae on products of compact Riemannian manifolds
(201509)  Journal articleAbstract One standard way of considering a probability distribution on the unit n cube, [0 , 1]n , due to Sklar (1959), is to decompose it into its marginal distributions and a copula, i.e. a probability distribution on ... 
The critical merger distance between two corotating quasigeostrophic vortices
(20050110)  Journal articleThis paper examines the critical merger or strong interaction distance between two equalpotentialvorticity quasigeostrophic vortices. The interaction between the two vortices depends on five parameters: their volume ... 
A critical review of the literature on population modelling
(University of St Andrews, 2009)  ReportThe 2005 report of the National Research Council’s ‘Committee on Characterizing Biologically Significant Marine Mammal Behavior’ proposed a framework, which they called PCAD  Population Consequences of Acoustic Disturbance, ... 
Decomposition tables for experiments : I. A chain of randomizations
(200912)  Journal articleOne aspect of evaluating the design for an experiment is the discovery of the relationships between subspaces of the data space. Initially we establish the notation and methods for evaluating an experiment with a single ... 
Decomposition tables for experiments : II. Two–one randomizations
(201010)  Journal articleWe investigate structure for pairs of randomizations that do not follow each other in a chain. These are unrandomizedinclusive, independent, coincident or double randomizations. This involves taking several structures ... 
A default prior distribution for contingency tables with dependent factor levels
(201401)  Journal articleA default prior distribution is proposed for the Bayesian analysis of contingency tables. The prior is specified to allow for dependence between levels of the factors. Different dependence structures are considered, including ... 
Density estimation and time trend analysis of large herbivores in Nagarhole, India
(2005)  ThesisDensity estimates for six large herbivore species were obtained through analysis of line transect data from Nagarhole National Park, southwestern India, collected between 1989 and 2000. These species were Chital (Axis ... 
The dependence of coronal loop heating on the characteristics of slow photospheric motions
(20160606)  Journal articleThe Parker hypothesis assumes that heating of coronal loops occurs due to reconnection, induced when photospheric motions braid field lines to the point of current sheet formation. In this contribution we address the ... 
Depletion of nonlinearity in the pressure force driving NavierStokes flows : nonlinear depletion in NS flows
(20150417)  Journal articleThe dynamics of the velocity norms uLq for q ≥ 3, in NavierStokes flows is studied. The pressure term that drives this dynamics has a high degree of nonlinear depletion, which owes its origin to a genuine negative ... 
Description and seasonal detection of two potential whale calls recorded in the Indian Ocean
(201509)  Journal articleUnidentified acoustic signals are recorded by hydrophones placed in the world's oceans. Some of these sounds are suspected to originate from marine mammals. In this study, two acoustic signals recorded by two arrays at ... 
Design and analysis of line transect surveys for primates
(201010)  Journal articleLine transect surveys are widely used for estimating abundance of primate populations. The method relies on a small number of key assumptions, and if these are not met, substantial bias may occur. For a variety of reasons, ... 
Digit frequencies and Bernoulli convolutions
(20140627)  Journal articleIt is well known that when β is a Pisot number, the corresponding Bernoulli convolution ν(β) has Hausdorff dimension less than 1, i.e. that there exists a set A(β) with (ν(β))(A(β))=1 and dim_H(A(β))<1. We show explicitly ... 
Dimension and measure for generic continuous images
(2013)  Journal articleWe consider the Banach space consisting of continuous functions from an arbitrary uncountable compact metric space, X, into Rn. The key question is 'what is the generic dimension of f(X)?' and we consider two different ... 
Dimension conservation for selfsimilar sets and fractal percolation
(2015)  Journal articleWe introduce a technique that uses projection properties of fractal percolation to establish dimension conservation results for sections of deterministic selfsimilar sets. For example, let K be a selfsimilar subset of ... 
The dimension of projections of selfaffine sets and measures
(2015)  Journal articleLet E be a plane selfaffine set defined by affine transformations with linear parts given by matrices with positive entries. We show that if μ is a Bernoulli measure on E with dimHμ = dimLμ, where dimH and dimL denote ... 
Distance software: design and analysis of distance sampling surveys for estimating population size
(2010)  Journal article1. Distance sampling is a widely used technique for estimating the size or density of biological populations. Many distance sampling designs and most analyses use the software Distance. 2. We briefly review distance sampling ... 
Doubleobserver line transect methods : levels of independence
(201003)  Journal articleDoubleobserver line transect methods are becoming increasingly widespread, especially for the estimation of marine mammal abundance from aerial and shipboard surveys when detection of animals on the line is uncertain. The ... 
Doubleobserver line transect surveys with Markovmodulated Poisson process models for overdispersed animal availability
(201512)  Journal articleWe develop maximum likelihood methods for line transect surveys in which animals go undetected at distance zero, either because they are stochastically unavailable while within view or because they are missed when they are ... 
Effect of collisions on amplification of laser beams by Brillouin scattering in plasmas
(201310)  Journal articleWe report on particle in cell simulations of energy transfer between a laser pump beam and a counterpropagating seed beam using the Brillouin scattering process in uniform plasma including collisions. The results presented ...