Now showing items 30-49 of 222

  • Comparison of aerial survey methods for estimating abundance of common scoters 

    Rexstad, Eric; Buckland, Stephen T. (CREEM, University of St Andrews, 2009) - Report
    During the month of March, four survey methods were applied to the SPA at Camarthen Bay. WWT staff carried out visual aerial surveys using distance sampling methodology (Camphuysen et al. 2004). Visual shore-based counts ...
  • Complex Region Spatial Smoother (CReSS) 

    Scott Hayward, Lindesay Alexandra Sarah; MacKenzie, Monique Lea; Donovan, Carl Robert; Walker, Cameron; Ashe, Erin (University of St Andrews, 2011) - Report
    Conventional smoothing over complicated coastal and island regions may result in errors across boundaries, due to the use of Euclidean distances to represent inter-point similarity. The new Complex Region Spatial Smoother ...
  • conting : an R package for Bayesian analysis of complete and incomplete contingency tables 

    Overstall, Antony; King, Ruth (2014-06) - Journal article
    The aim of this paper is to demonstrate the R package conting for the Bayesian analysis of complete and incomplete contingency tables using hierarchical log-linear models. This package allows a user to identify interactions ...
  • Convectively induced shear instability in large amplitude internal solitary waves 

    Carr, Magda; Fructus, D; Grue, J; Jensen, A; Davies, P A (2008-12) - Journal article
    Laboratory study has been carried out to investigate the instability of an internal solitary wave of depression in a shallow stratified fluid system. The experimental campaign has been supported by theoretical computations ...
  • Coprime invariable generation and minimal-exponent groups 

    Detomi, Eloisa; Lucchini, Andrea; Roney-Dougal, C.M. (2015-08) - Journal article
    A 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 

    Jupp, P.E. (2015-09) - Journal article
    Abstract 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 co-rotating quasi-geostrophic vortices 

    Reinaud, Jean Noel; Dritschel, David Gerard (2005-01-10) - Journal article
    This paper examines the critical merger or strong interaction distance between two equal-potential-vorticity quasi-geostrophic vortices. The interaction between the two vortices depends on five parameters: their volume ...
  • A critical review of the literature on population modelling 

    Cabrelli, Abigail; Harwood, John; Matthiopoulos, Jason; New, Leslie Frances; Thomas, Len (University of St Andrews, 2009) - Report
    The 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 

    Brien, C. J.; Bailey, Rosemary Anne (2009-12) - Journal article
    One 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 

    Brien, C. J.; Bailey, Rosemary Anne (2010-10) - Journal article
    We investigate structure for pairs of randomizations that do not follow each other in a chain. These are unrandomized-inclusive, independent, coincident or double randomizations. This involves taking several structures ...
  • A default prior distribution for contingency tables with dependent factor levels 

    Overstall, Antony; King, Ruth (2014-01) - Journal article
    A 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 

    Gangadharan, Aditya (2005) - Thesis
    Density estimates for six large herbivore species were obtained through analysis of line transect data from Nagarhole National Park, south-western India, collected between 1989 and 2000. These species were Chital (Axis ...
  • Depletion of nonlinearity in the pressure force driving Navier-Stokes flows : nonlinear depletion in NS flows 

    Tran, Chuong Van; Yu, Xinwei (2015-04-17) - Journal article
    The dynamics of the velocity norms ||u||Lq for q ≥ 3, in Navier-Stokes 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 

    Sousa, Andreia G; Harris, Danielle (2015-09) - Journal article
    Unidentified 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 

    Buckland, Stephen Terrence; Plumptre, A J; Thomas, Len; Rexstad, Eric A (2010-10) - Journal article
    Line 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 

    Kempton, Thomas Michael William (2014-06-27) - Journal article
    It 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 

    Balka, Richard; Farkas, Abel; Fraser, Jonathan M.; Hyde, James T. (2013) - Journal article
    We consider the Banach space consisting of continuous functions from an arbitrary uncountable compact metric space, X, into R-n. The key question is 'what is the generic dimension of f(X)?' and we consider two different ...
  • Distance software: design and analysis of distance sampling surveys for estimating population size 

    Thomas, Len; Buckland, Stephen Terrence; Rexstad, Eric; Laake, J L; Strindberg, S; Hedley, S L; Bishop, J R B; Marques, Tiago Andre Lamas Oliveira (2010) - Journal article
    1. 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 ...
  • Double-observer line transect methods : levels of independence 

    Buckland, Stephen Terrence; Laake, Jeffrey L.; Borchers, David Louis (2010-03) - Journal article
    Double-observer 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 ...
  • Double-observer line transect surveys with Markov-modulated Poisson process models for overdispersed animal availability 

    Borchers, David Louis; Langrock, Roland (2015) - Journal article
    We 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 ...