Now showing items 19-38 of 257

  • Bayesian methods for hierarchical distance sampling models 

    Oedekoven, Cornelia Sabrina; Buckland, Stephen Terrence; MacKenzie, Monique Lea; King, Ruth; Evans, Kristine; Burger, Wes (2014-06-01) - Journal article
    The few distance sampling studies that use Bayesian methods typically consider only line transect sampling with a half-normal detection function. We present a Bayesian approach to analyse distance sampling data applicable ...
  • Bayesian sequential tests of the initial size of a linear pure death process 

    Goudie, I.B.J. (2015-05) - Journal article
    We provide a recursive algorithm for determining the sampling plans of invariant Bayesian sequential tests of the initial size of a linear pure death process of unknown rate. These tests compare favourably with the ...
  • Behind and beyond a theorem on groups related to trivalent graphs 

    Havas, George; Robertson, Edmund F.; Sutherland, Dale C. (2008-12) - Journal article
    In 2006 we completed the proof of a five-part conjecture that was made in 1977 about a family of groups related to trivalent graphs. This family covers all 2-generator, 2-relator groups where one relator specifies that a ...
  • Bending and twisting instabilities of columnar elliptical vortices in a rotating strongly stratified fluid 

    Billant, Paul; Dritschel, David Gerard; Chomaz, Jean-Marc (2006-08-25) - Journal article
    In this paper, we investigate the three-dimensional stability of the Moore-Saffman elliptical vortex in a rotating stratified fluid. By means of an asymptotic analysis for long vertical wavelength perturbations and small ...
  • The Bergman property for semigroups 

    Maltcev, V.; Mitchell, J. D.; Ruskuc, N. (2009-08) - Journal article
    In this article, we study the Bergman property for semigroups and the associated notions of cofinality and strong cofinality. A large part of the paper is devoted to determining when the Bergman property, and the values ...
  • Beyond sum-free sets in the natural numbers 

    Huczynska, Sophie (2014-02-07) - Journal article
    For an interval [1,N]⊆N, sets S⊆[1,N] with the property that |{(x,y)∈S2:x+y∈S}|=0, known as sum-free sets, have attracted considerable attention. In this paper, we generalize this notion by considering r(S)=|{(x,y)∈S2:x+y∈S}|, ...
  • Cancellative and Malcev presentations for finite Rees index subsemigroups and extensions 

    Cain, Alan James; Robertson, Edmund Frederick; Ruskuc, Nik (2008-02) - Journal article
    It is known that, for semigroups, the property of admitting a finite presentation is preserved on passing to subsemigroups and extensions of finite Rees index. The present paper shows that the same holds true for Malcev, ...
  • Capture-recapture abundance estimation using a semi-complete data likelihood approach 

    King, Ruth; T. McClintock, Brett; Kidney, Darren; Borchers, David (2016-03) - Journal article
    Capture-recapture data are often collected when abundance estimation is of interest. In the presence of unobserved individual heterogeneity, specified on a continuous scale for the capture probabilities, the likelihood is ...
  • A changepoint analysis of spatio-temporal point processes 

    Altieri, Linda; Scott, E. Marian; Cocchi, Daniela; Illian, Janine B. (2015) - Journal article
    This work introduces a Bayesian approach to detecting multiple unknown changepoints over time in the inhomogeneous intensity of a spatio-temporal point process with spatial and temporal dependence within segments. We propose ...
  • Chronic exposure to imidacloprid increases neuronal vulnerability to mitochondrial dysfunction in the bumblebee (Bombus terrestris) 

    Moffat, C.; Goncalves Pacheco, J.; Sharpe, S.; Samson, A.J.; Bollan, K.A.; Huang, J.; Buckland, Stephen Terrence; Connolly, C.N. (2015-05) - Journal article
    The global decline in the abundance and diversity of insect pollinators could result from habitat loss, disease, and pesticide exposure. The contribution of the neonicotinoid insecticides (e.g., clothianidin and imidacloprid) ...
  • Circular designs balanced for neighbours at distances one and two 

    Aldred, R. E. L.; Bailey, R. A.; Mckay, Brendan D.; Wanless, Ian M. (2014-12) - Journal article
    We define three types of neighbour-balanced designs for experiments where the units are arranged in a circle or single line in space or time. The designs are balanced with respect to neighbours at distance one and at ...
  • Circular designs balanced for neighbours at distances one and two 

    Aldred, R. E. L.; Bailey, R. A.; Mckay, Brendan D.; Wanless, Ian M. (2014-12) - Journal article
    We define three types of neighbour-balanced designs for experiments where the units are arranged in a circle or single line in space or time. The designs are balanced with respect to neighbours at distance one and at ...
  • Codimension formulae for the intersection of fractal subsets of Cantor spaces 

    Donoven, Casey; Falconer, Kenneth John (2016-02) - Journal article
    We examine the dimensions of the intersection of a subset E of an m-ary Cantor space Cm with the image of a subset F under a random isometry with respect to a natural metric. We obtain almost sure upper bounds for the ...
  • Comparing pre- and post-construction distributions of long-tailed ducks Clangula hyemalis in and around the Nysted offshore wind farm, Denmark : a quasi-designed experiment accounting for imperfect detection, local surface features and autocorrelation 

    Petersen, Ib Krag; MacKenzie, Monique Lea; Rexstad, Eric; Wisz, Mary S.; Fox, Anthony D. (University of St Andrews, 2011) - Report
    We report a novel technique to model abundance patterns of wintering seaducks in relation to the construction of an offshore wind farm (OWF) based on seven years of aerial survey transect data. Distance sampling was used ...
  • 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 ...
  • A computational framework for particle and whole cell tracking applied to a real biological dataset 

    Yang, Feng Wei; Venkataraman, Chandrasekhar; Styles, Vanessa; Kuttenberger, Verena; Horn, Elias; von Guttenberg, Zeno; Madzvamuse, Anotida (2016-05-24) - Journal article
    Cell tracking is becoming increasingly important in cell biology as it provides a valuable tool for analysing experimental data and hence furthering our understanding of dynamic cellular phenomena. The advent of high-throughput, ...
  • Computing finite semigroups 

    East, J.; Egri-Nagy, A.; Mitchell, J. D.; Péresse, Y. (2015-10-07) - Journal article
    Using a variant of Schreier's Theorem, and the theory of Green's relations, we show how to reduce the computation of an arbitrary subsemigroup of a finite regular semigroup to that of certain associated subgroups. Examples ...
  • 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 ...