Browsing Mathematics (Faculty of) by Type "Article"
Now showing items 2140 of 245

Coevolution Of Risk Perception, Sexual Behaviour, And Hiv Transmission In An AgentBased Model
(Elsevier, 20131121)Risk perception shapes individual behaviour, and is in turn shaped by the consequences of that behaviour. Here we explore this dynamics in the context of human immunodeficiency virus (HIV) spread. We construct a simplified ... 
Cohort study design for illnessdeath processes with disease status under intermittent observation
(Taylor & Francis, 20191212)Cohort studies are routinely conducted to learn about the incidence or progression rates of chronic diseases. The illnessdeath model offers a natural framework for joint consideration of nonfatal events in the semicompeting ... 
Compact ideals and rigidity of representations for amenable operator algebras
(Polish Academy of Sciences, 2019)We examine rigidity phenomena for representations of amenable operator algebras which have an ideal of compact operators. We establish that a generalized version of Kadison’s conjecture on completely bounded homomorphisms ... 
Comparing malaria surveillance with periodic spraying in the presence of insecticideresistant mosquitoes: Should we spray regularly or based on human infections?
(Elsevier, 20160601)There is an urgent need for more understanding of the effects of surveillance on malaria control. Indoor residual spraying has had beneficial effects on global malaria reduction, but resistance to the insecticide poses a ... 
Competition Between Injunctive Social Norms And Conservation Priorities Gives Rise To Complex Dynamics In A Model Of Forest Growth And Opinion Dynamics
(Elsevier, 20171107)Human and environmental systems are often treated as existing in isolation from one another, whereas in fact they are often two parts of a single, coupled humanenvironment system. Developing theoretical models of coupled ... 
Complexity Of Atoms Of Regular Languages
(World Scientific Publishing, 20131101)The quotient complexity of a regular language L, which is the same as its state complexity the number of left quotients of L. An atom of a nonempty regular language L with n quotients is a nonempty intersection of the n ... 
Complexity of proper prefixconvex regular languages
(Elsevier, 20191001)A language L over an alphabet Σ is prefixconvex if, for any words x,y,z ∈ Σ*, whenever x and xyz are in L, then so is xy. Prefixconvex languages include rightideal, prefixclosed, and prefixfree languages, which were ... 
Complexity of RightIdeal, PrefixClosed, and PrefixFree Regular Languages
(Institute of Informatics: University of Szeged, 2017)A language L over an alphabet E is prefixconvex if, for any words x, y, z is an element of Sigma*, whenever x and xyz are in L, then so is xy. Prefixconvex languages include rightideal, prefixclosed, and prefixfree ... 
Complexity of SuffixFree Regular Languages
(Elsevier, 20171101)We study various complexity properties of suffixfree regular languages. A sequence (Lk,Lk+1,…) of regular languages in some class, where n is the quotient complexity of Ln, is most complex if its languages Ln meet the ... 
Composite likelihood for aggregate data from clustered multistate processes under intermittent observation
(Taylor & Francis, 20190311)Markov processes offer a useful basis for modeling the progression of organisms through successive stages of their life cycle. When organisms are examined intermittently in developmental studies, likelihoods can be constructed ... 
Composite likelihood for joint analysis of multiple multistate processes via copulas
(Oxford Journals, 201410)A copulabased model is described which enables joint analysis of multiple progressive multistate processes. Unlike intensitybased or frailtybased approaches to joint modeling, the copula formulation proposed herein ... 
Compressions of Compact Tuples
(Elsevier, 20190301)We study the matrix range of a tuple of compact operators on a Hilbert space and examine the notions of minimal, nonsingular, and fully compressed tuples. In this pursuit, we refine previous results by characterizing ... 
Computing lower rank approximations of matrix polynomials
(Elsevier, 202005)Given an input matrix polynomial whose coefficients are floating point numbers, we consider the problem of finding the nearest matrix polynomial which has rank at most a specified value. This generalizes the problem of ... 
ConstrainedCNN losses for weakly supervised segmentation
(Elsevier, 201905)Weaklysupervised learning based on, e.g., partially labelled images or imagetags, is currently attracting significant attention in CNN segmentation as it can mitigate the need for full and laborious pixel/voxel annotations. ... 
Constraint bubbles and affine regions: reduced fluid models for efficient immersed bubbles and flexible spatial coarsening
(Association for Computing Machinery, 202007)We propose to enhance the capability of standard freesurface flow simulators with efficient support for immersed bubbles through two new models: constraintbased bubbles and affine fluid regions. Unlike its predecessors, ... 
Continuous approximation of linear impulsive systems and a new form of robust stability
(Elsevier, 20180101)The timescale tolerance for linear ordinary impulsive differential equations is introduced. How large the timescale tolerance is directly reflects the degree to which the qualitative dynamics of the linear impulsive ... 
Continuum Foam: A Material Point Method for ShearDependent Flows
(Association for Computing Machinery, 20151001)We consider the simulation of dense foams composed of microscopic bubbles, such as shaving cream and whipped cream. We represent foam not as a collection of discrete bubbles, but instead as a continuum. We employ the ... 
Control of the Landau–Lifshitz equation
(Elsevier, 201605)The Landau–Lifshitz equation describes the dynamics of magnetization inside a ferromagnet. This equation is nonlinear and has an infinite number of stable equilibria. It is desirable to control the system from one equilibrium ... 
Controlling the workload of M/G/1 queues via the qpolicy
(Elsevier, 20150601)We consider a singleserver queueing system with Poisson arrivals and generally distributed service times. To systematically control the workload of the queue, we define for each busy period an associated timer process, ... 
Convective flow reversal in selfpowered enzyme micropumps
(Proceedings of the National Academy of Sciences, 20160222)Surfacebound enzymes can act as pumps that drive largescale fluid flows in the presence of their substrates or promoters. Thus, enzymatic catalysis can be harnessed for "on demand" pumping in nanoand microfluidic devices ...