Now showing items 1-20 of 330

  • 3D whole-prominence fine structure modeling 

    Gunar, Stanislav; Mackay, Duncan Hendry (2015-04-20) - Journal article
    We present the first 3D whole-prominence fine structure model. The model combines a 3D magnetic field configuration of an entire prominence obtained from nonlinear force-free field simulations, with a detailed description ...
  • 50-Year Anniversary of Papers by Cormack, Jolly and Seber 

    Buckland, Stephen Terrence; Morgan, Byron J T (2016-05) - Journal item
  • Acoustic and foraging behavior of a Baird’s beaked whale, Berardius bairdii, exposed to simulated sonar 

    Stimpert, Alison; De Ruiter, Stacy Lynn; Southall, Brandon; Moretti, David; Falcone, Erin; Goldbogen, Jeremy; Friedlaender, Ari; Schorr, Greg; Calambokidis, John (2014-11-13) - Journal article
    Beaked whales are hypothesized to be particularly sensitive to anthropogenic noise, based on previous strandings and limited experimental and observational data. However, few species have been studied in detail. We describe ...
  • Acoustic sequences in non-human animals : a tutorial review and prospectus 

    Kershenbaum, Arik; Blumstein, Dan; Roch, Marie; Akçay, Çaglar; Backus, Gregory; Bee, Mark A.; Bohn, Kirsten; Cao, Yan; Carter, Gerald; Cäsar, Cristiane; Coen, Michael; De Ruiter, Stacy Lynn; Doyle, Laurance; Edelman, Shimon; Ferrer-i-Cancho, Ramon; Freeberg, Todd M.; Garland, Ellen Clare; Gustison, Morgan; Harley, Heidi E.; Huetz, Chloé; Hughes, Melissa; Bruno, Julia Hyland; Ilany, Amiyaal; Jin, Dezhe Z.; Johnson, Michael; Ju, Chenghui; Karnowski, Jeremy; Lohr, Bernard; Manser, Marta; McCowan, Brenda; Mercado III, Eduardo; Narins, Peter M.; Piel, Alex; Rice, Megan; Salmi, Roberta; Sasahara, Kazutoshi; Sayigh, Laela; Shiu, Yu; Taylor, Charles; Vallejo, Edgar E.; Waller, Sara; Zamora-Gutierrez, Veronica (2016-02) - Journal article
    Animal acoustic communication often takes the form of complex sequences, made up of multiple distinct acoustic units. Apart from the well-known example of birdsong, other animals such as insects, amphibians,and mammals ...
  • Alfvén wave boundary condition for responsive magnetosphere- ionosphere coupling 

    Wright, A.N.; Russell, A.J.B. (2014-05-01) - Journal article
    The solution of electric fields and currents in a height-resolved ionosphere is traditionally solved as an elliptic equation with Dirichlet or Neumann boundary condition in which the magnetosphere is represented as an ...
  • Algorithms for detecting dependencies and rigid subsystems for CAD 

    Farre, James; Kleinschmidt, Helena; Sidman, Jessica; John, Audrey St.; Stark, Stephanie; Theran, Louis; Yu, Xilin (2016-10-01) - Journal article
    Automated approaches for detecting dependencies in structures created with Computer Aided Design software are critical for developing robust solvers and providing informative user feedback. We model a set of geometric ...
  • Analysing mark-recapture-recovery data in the presence of missing covariate data via multiple imputation 

    Worthington, Hannah; King, Ruth; Buckland, Stephen Terrence (2015-03) - Journal article
    We consider mark–recapture–recovery data with additional individual time-varying continuous covariate data. For such data it is common to specify the model parameters, and in particular the survival probabilities, as a ...
  • An analysis of pilot whale vocalization activity using hidden Markov models 

    Popov, Valentin Mina; Langrock, Roland; De Ruiter, Stacy Lynn; Visser, Fleur (2017-01) - Journal article
    Vocalizations of cetaceans form a key component of their social interactions. Such vocalization activity is driven by the behavioral states of the whales, which are not directly observable, so that latent-state models are ...
  • Assessing quality of spatial models using the structural similarity index and posterior predictive checks 

    Robertson, Colin; Long, Jed Andrew; Nathoo, F.S.; Nelson, T.A.; Plouffe, C.C.F. (2014) - Journal article
    Model assessment is one of the most important aspects of statistical analysis. In geographical analysis, models represent spatial processes, where variability in mapped output results from uncertainty in parameter estimates. ...
  • The Assouad dimension of randomly generated fractals 

    Fraser, Jonathan MacDonald; Miao, Jun Jie; Troscheit, Sascha (2016-09-22) - Journal article
    We consider several dierent models for generating random fractals including random self-similar sets, random self-affine carpets, and Mandelbrot percolation. In each setting we compute either the almost sure or the Baire ...
  • The Assouad dimension of self-affine carpets with no grid structure 

    Fraser, Jonathan MacDonald; Jordan, Thomas (2016-12-21) - Journal article
    Previous study of the Assouad dimension of planar self-affine sets has relied heavily on the underlying IFS having a `grid structure', thus allowing for the use of approximate squares. We study the Assouad dimension of a ...
  • The Assouad dimensions of projections of planar sets 

    Fraser, Jonathan M.; Orponen, Tuomas (2017-02) - Journal article
    We consider the Assouad dimensions of orthogonal projections of planar sets onto lines. Our investigation covers both general and self-similar sets. For general sets, the main result is the following: if a set in the plane ...
  • Assouad type dimensions and homogeneity of fractals 

    Fraser, Jonathan M. (2014-12) - Journal article
    We investigate several aspects of the Assouad dimension and the lower dimension, which together form a natural 'dimension pair'. In particular, we compute these dimensions for certain classes of self-affine sets and ...
  • Attractors of directed graph IFSs that are not standard IFS attractors and their Hausdorff measure 

    Boore, Graeme; Falconer, Kenneth John (2013) - Journal article
    For directed graph iterated function systems (IFSs) defined on R, we prove that a class of 2-vertex directed graph IFSs have attractors that cannot be the attractors of standard (1-vertex directed graph) IFSs, with or ...
  • Automatic generation of generalised regular factorial designs 

    Kobilinsky, André; Monod, Hervé; Bailey, R. A. (2017-09) - Journal article
    The R package planor enables the user to search for, and construct, factorial designs satisfying given conditions. The user specifies the factors and their numbers of levels, the factorial terms which are assumed to be ...
  • Automatic presentations and semigroup constructions 

    Cain, Alan J.; Oliver, Graham; Ruskuc, Nik; Thomas, Richard M. (2010-08) - Journal article
    An automatic presentation for a relational structure is, informally, an abstract representation of the elements of that structure by means of a regular language such that the relations can all be recognized by finite ...
  • Automatic presentations for semigroups 

    Cain, Alan James; Oliver, Graham; Ruskuc, Nik; Thomas, Richard M. (2009-11) - Journal article
    This paper applies the concept of FA-presentable structures to semigroups. We give a complete classification of the finitely generated FA-presentable cancellative semigroups: namely, a finitely generated cancellative ...
  • Automorphism groups of countable algebraically closed graphs and endomorphisms of the random graph 

    Dolinka, Igor; Gray, Robert Duncan; McPhee, Jillian Dawn; Mitchell, James David; Quick, Martyn (2016-05) - Journal article
    We establish links between countable algebraically closed graphs and the endomorphisms of the countable universal graph R. As a consequence we show that, for any countable graph Γ, there are uncountably many maximal subgroups ...
  • Average distances on self-similar sets and higher order average distances of self-similar measures 

    Allen, D.; Edwards, H.; Harper, S.; Olsen, Lars Ole Ronnow (2016-12-29) - Journal article
    The purpose of this paper is twofold: (1) We study different notions of the average distance between two points of a self-similar subset of ℝ, and (2) we investigate the asymptotic behaviour of higher order average moments ...
  • Backward wave cyclotron-maser emission in the auroral magnetosphere 

    Speirs, D. C.; Bingham, R.; Cairns, R. A.; Vorgul, I.; Kellett, B. J.; Phelps, A. D. R.; Ronald, K. (2014-10-07) - Journal article
    In this Letter, we present theory and particle-in-cell simulations describing cyclotron radio emission from Earth's auroral region and similar phenomena in other astrophysical environments. In particular, we find that the ...