Browsing by Classification "QA"
Now showing items 6584 of 222

Falling towards forgetfulness : synaptic decay prevents spontaneous recovery of memory
(20080822)  Journal articleLong after a new language has been learned and forgotten, relearning a few words seems to trigger the recall of other words. This "freelunch learning'' (FLL) effect has been demonstrated both in humans and in neural network ... 
A family of spatial biodiversity measures based on graphs
(201212)  Journal articleWhile much research in ecology has focused on spatially explicit modelling as well as on measures of biodiversity, the concept of spatial (or local) biodiversity has been discussed very little. This paper generalises ... 
Finite groups are big as semigroups
(201109)  Journal articleWe prove that a finite group G occurs as a maximal proper subsemigroup of an infinite semigroup (in the terminology of Freese, Ježek, and Nation, G is a big semigroup) if and only if G ≥ 3. In fact, any finite semigroup ... 
Fitting complex ecological point process models with integrated nested Laplace approximation
(201304)  Journal articleSummary 1. We highlight an emerging statistical method, integrated nested Laplace approximation (INLA), which is ideally suited for fitting complex models to many of the rich spatial data sets that ecologists wish to ... 
Formation and largescale patterns of filament channels and filaments
(Springer International Publishing, 2015)  Book itemThe properties and largescale patterns of filament channels and filaments are considered. Initially, the global formation locations of filament channels and filaments are discussed, along with their hemispheric pattern. ... 
The formation and stability of Petschek reconnection
(201411)  Journal articleA combined analytical and numerical study of magnetic reconnection in twodimensional resistive magnetohydrodynamics is carried out by using different explicit spatial variations of the resistivity. A special emphasis on ... 
Free products in R. Thompson’s group V
(201311)  Journal articleWe investigate some product structures in R. Thompson's group $ V$, primarily by studying the topological dynamics associated with $ V$'s action on the Cantor set C. We draw attention to the class D(V,C) of groups which ... 
The functional response of a generalist predator
(20100527)  Journal articleBackground: Predators can have profound impacts on the dynamics of their prey that depend on how predator consumption is affected by prey density (the predator's functional response). Consumption by a generalist predator ... 
A general discretetime modeling framework for animal movement using multistate random walks
(201208)  Journal articleRecent developments in animal tracking technology have permitted the collection of detailed data on the movement paths of individuals from many species. However, analysis methods for these data have not developed at a ... 
A generalised likelihood framework for partially observed capturerecapturerecovery models
(2014)  Journal articleWe provide a closed form likelihood expression for multistate markrecapturerecovery data when the state of an individual may be only partially observed. The corresponding su cient statistics are presented in addition ... 
Generalized dimensions of images of measures under Gaussian processes
(20140215)  Journal articleWe show that for certain Gaussian random processes and fields X:RN→Rd, Dq(μx) = min {d, 1/α Dq (μ)} a.s., for an index α which depends on Hölder properties and strong local nondeterminism of X, where q>1, where Dq denotes ... 
Generalized energy inequalities and higher multifractal moments
(SpringerVerlag, 20140802)  Conference itemWe present a class of generalized energy inequalities and indicate their use in investigating higher multifractal moments, in particular Lqdimensions of images of measures under Brownian processes, Lqdimensions of almost ... 
Generating continuous mappings with Lipschitz mappings
(200705)  Journal articleIf X is a metric space, then CX and LX denote the semigroups of continuous and Lipschitz mappings, respectively, from X to itself. The relative rank of CX modulo LX is the least cardinality of any set U\LX where U ... 
Generating the full transformation semigroup using order preserving mappings
(200309)  Journal articleFor a linearly ordered set X we consider the relative rank of the semigroup of all order preserving mappings OX on X modulo the full transformation semigroup Ex. In other words, we ask what is the smallest cardinality of ... 
Generating transformation semigroups using endomorphisms of preorders, graphs, and tolerances
(201009)  Journal articleLet ΩΩ be the semigroup of all mappings of a countably infinite set Ω. If U and V are subsemigroups of ΩΩ, then we write U≈V if there exists a finite subset F of ΩΩ such that the subsemigroup generated by U and F equals ... 
Generators and relations for subsemigroups via boundaries in Cayley graphs
(201111)  Journal articleGiven a finitely generated semigroup S and subsemigroup T of S we define the notion of the boundary of T in S which, intuitively, describes the position of T inside the left and right Cayley graphs of S. We prove that if ... 
Geometric grid classes of permutations
(201311)  Journal articleA geometric grid class consists of those permutations that can be drawn on a specified set of line segments of slope ±1 arranged in a rectangular pattern governed by a matrix. Using a mixture of geometric and language ... 
The geometric mean of relative abundance indices : a biodiversity measure with a difference
(20110902)  Journal articleThe 2010 Biodiversity Target of the Convention on Biological Diversity (CBD), set in 2002, which stated that there should be ‘a significant reduction of the current rate of biodiversity loss' by 2010, highlighted the need ... 
Geometrisation of firstorder logic
(201506)  Journal articleThat every firstorder theory has a coherent conservative extension is regarded by some as obvious, even trivial, and by others as not at all obvious, but instead remarkable and valuable; the result is in any case neither ... 
Global analysis of cetacean linetransect surveys : detecting trends in cetacean density
(20120507)  Journal articleMeasuring the effect of anthropogenic change on cetacean populations is hampered by our lack of understanding about population status and a lack of power in the available data to detect trends in abundance. Often longterm ...