Now showing items 46-65 of 247

  • 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 ...
  • The dependence of coronal loop heating on the characteristics of slow photospheric motions 

    Ritchie, M. L.; Wilmot-Smith, A. L.; Hornig, G. (2016-06-06) - Journal article
    The 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 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 ...
  • The dimension of projections of self-affine sets and measures 

    Falconer, Kenneth John; Kempton, Thomas Michael William (2015) - Journal article
    Let E be a plane self-affine 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 

    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 ...
  • Effect of collisions on amplification of laser beams by Brillouin scattering in plasmas 

    Humphrey, K. A.; Trines, R. M. G. M.; Fiuza, F.; Speirs, D. C.; Norreys, P.; Cairns, R. A.; Silva, L. O.; Bingham, R. (2013-10) - Journal article
    We report on particle in cell simulations of energy transfer between a laser pump beam and a counter-propagating seed beam using the Brillouin scattering process in uniform plasma including collisions. The results presented ...
  • Effect of Prandtl's ration on balance in geophysical turbulence 

    Dritschel, David Gerard; McKiver, William Joseph (2015-07-21) - Journal article
    The fluid dynamics of the atmosphere and oceans are to a large extent controlled by the slow evolution of a scalar field called ‘potential vorticity’, with relatively fast motions such as inertia-gravity waves playing only ...
  • An efficient acoustic density estimation method with human detectors applied to gibbons in Cambodia 

    Kidney, Darren; Rawson, Benjamin M.; Borchers, David Louis; Stevenson, Ben; Marques, Tiago A.; Thomas, Len (2016-05-19) - Journal article
    Some animal species are hard to see but easy to hear. Standard visual methods for estimating population density for such species are often ineffective or inefficient, but methods based on passive acoustics show more promise. ...
  • Ellipsoidal vortices in rotating stratified fluids : beyond the quasi-geostrophic approximation 

    Tsang, Yue-Kin; Dritschel, David G. (2015-01) - Journal article
    We examine the basic properties and stability of isolated vortices having uniform potential vorticity (PV) in a non-hydrostatic rotating stratified fluid, under the Boussinesq approximation. For simplicity, we consider a ...
  • Embeddings into Thompson's group V and coCF groups 

    Bleak, Collin; Matucci, Francesco; Neunhöffer, Max (2016-04-28) - Journal article
    Lehnert and Schweitzer show in [21] that R. Thompson's group V is a co-context-free (coCF ) group, thus implying that all of its finitely generated subgroups are also coCF groups. Also, Lehnert shows in his thesis that V ...
  • Emergence of non-twisted magnetic fields in the Sun : jets and atmospheric response 

    Syntelis, P.; Archontis, V.; Gontikakis, C.; Tsinganos, K. (2015-12) - Journal article
    Aims. We study the emergence of a non-twisted flux tube from the solar interior into the solar atmosphere. We investigate whether the length of the buoyant part of the flux tube (i.e. λ) affects the emergence of the field ...
  • Estimating animal population density using passive acoustics 

    Marques, Tiago A.; Thomas, Len; Martin, Stephen; Mellinger, David; Ward, Jessica; Moretti, David; Harris, Danielle Veronica; Tyack, Peter Lloyd (2013-05) - Journal article
    Reliable estimation of the size or density of wild animal populations is very important for effective wildlife management, conservation and ecology. Currently, the most widely used methods for obtaining such estimates ...