Browsing Mathematics (Faculty of) by Type "Article"
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Budgetconstrained optimal insurance without the nonnegativity constraint on indemnities
(Elsevier, 201901)In a problem of Paretoefficient insurance contracting (bilateral risk sharing) with expectedutility preferences, Gollier (1987) relaxes the nonnegativity constraint on indemnities and argues that the existence of a ... 
Carrot Or Stick? Modelling How Landowner Behavioural Responses Can Cause IncentiveBased Forest Governance To Backfire
(Public Library of Science, 20131030)Mitigating the negative impacts of declining worldwide forest cover remains a significant socioecological challenge, due to the dominant role of human decisionmaking. Here we use a Markov chain model of landuse dynamics ... 
A cellcentred finite volume method for the Poisson problem on nongraded quadtrees with second order accurate gradients
(Elsevier, 20170215)This paper introduces a twodimensional cellcentred finite volume discretization of the Poisson problem on adaptive Cartesian quadtree grids which exhibits second order accuracy in both "the solution and its gradients, ... 
Characteristics of quasistationary nearwall turbulence subjected to strong stable stratification in openchannel flows
(American Physical Society, 20200605)Characteristics of nearwall turbulence at quasistationarity under strong wall cooling are studied using direct numerical simulation of openchannel flow. It is shown that if turbulence reaches quasistationarity, then the ... 
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 ... 
A conceptual IoTbased earlywarning architecture for remote monitoring of COVID19 patients in wards and at home
(Elsevier, 202205)Due to the COVID19 pandemic, health services around the globe are struggling. An effective system for monitoring patients can improve healthcare delivery by avoiding inperson contacts, enabling earlydetection of severe ... 
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, ...