Browsing Mathematics (Faculty of) by Type "Article"
Now showing items 120 of 308

A 2class maintenance model with dynamic server behavior
(Springer, 20190429)We analyze a 2class maintenance system within a singleserver polling model framework. There are C+f machines in the system, where C is the cap on the number of machines that can be turned on simultaneously (and hence, ... 
Abelian, amenable operator algebras are similar to C∗ algebras
(Duke University Press, 201612)Suppose that H is a complex Hilbert space and that ℬ(H) denotes the bounded linear operators on H. We show that every abelian, amenable operator algebra is similar to a C∗algebra. We do this by showing that if 𝒜⊆ℬ(H) is ... 
Accurate viscous free surfaces for buckling, coiling, and rotating liquids
(Association for Computing Machinery, 200807)We present a fully implicit Eulerian technique for simulating free surface viscous liquids which eliminates artifacts in previous approaches, efficiently supports variable viscosity, and allows the simulation of more ... 
An adaptive variational finite difference framework for efficient symmetric octree viscosity
(ACM, 201907)While pressure forces are often the bottleneck in (near)inviscid fluid simulations, viscosity can impose orders of magnitude greater computational costs at lower Reynolds numbers. We propose an implicit octree finite ... 
Aging affects circadian clock and metabolism and modulates timing of medication
(Elsevier, 202104)Aging is associated with impairments in the circadian rhythms, and with energy deregulation that affects multiple metabolic pathways. The goal of this study is to unravel the complex interactions among aging, metabolism, ... 
ALGEBRAIC DEGREE IN SPATIAL MATRICIAL NUMERICAL RANGES OF LINEAR OPERATORS
(American Mathematical Society, 20210720)We study the maximal algebraic degree of principal orthocompressions of linear operators that constitute spatial matricial numerical ranges of higher order. We demonstrate (amongst other things) that for a (possibly ... 
Ambiguity aversion and optimal derivativebased pension investment with stochastic income and volatility
(Elsevier, 20180301)This paper provides a derivativebased optimal investment strategy for an ambiguityadverse pension investor who faces not only risks from timevarying income and market return volatility but also uncertain economic ... 
Analysis of a pressurerobust hybridized discontinuous Galerkin method for the stationary NavierStokes equations
(Springer, 20190830)We present wellposedness and an a priori error analysis of the hybridized discontinuous Galerkin method for the stationary form of the NavierStokes problem proposed in (J Sci Comput, 76(3):1484{ 1501, 2018). This scheme ... 
Analysis of intervalcensored recurrent event processes subject to resolution
(Wiley, 201509)Intervalcensored recurrent event data arise when the event of interest is not readily observed but the cumulative event count can be recorded at periodic assessment times. In some settings, chronic disease processes may ... 
An Anisotropic SubgridScale Parameterization for LargeEddy Simulations of Stratified Turbulence
(AMS, 20201001)Subgridscale (SGS) parameterizations in atmosphere and ocean models are often defined independently in the horizontal and vertical directions because the grid spacing is not the same in these directions (anisotropic ... 
An Antibiotic Protocol To Minimize Emergence Of DrugResistant Tuberculosis
(Elsevier, 20140415)A withinhost model of the spread of tuberculosis is proposed here where the emergence of drug resistance and bacterial dormancy are simultaneously combined. We consider both sensitive and resistant strains of tuberculosis ... 
Approximately Coloring Graphs Without Long Induced Paths
(Springer Nature, 2019)It is an open problem whether the 3coloring problem can be solved in polynomial time in the class of graphs that do not contain an induced path on t vertices, for fixed t. We propose an algorithm that, given a 3colorable ... 
Armitage Lecture 2011: The Design and Analysis of Life History Studies
(Wiley, 2013)Life history studies collect information on events and other outcomes during people’s lifetimes. For example, these may be related to childhood development, education, fertility, health, or employment. Such longitudinal ... 
Assessing a binary measurement system: A new plan using targeted verification with conditional sampling and baseline information
(Elsevier, 201911)We investigate efficient plans to assess the misclassification error rates of a binary measurement system used as an inline inspection protocol. We assume that parts can be inspected repeatedly and that each part has its ... 
Assessing the accuracy of predictive models with intervalcensored data
(Oxford University Press, 202201)We develop methods for assessing the predictive accuracy of a given event time model when the validation sample is comprised of case K intervalcensored data. An imputationbased, an inverse probability weighted (IPW), and ... 
Augmented composite likelihood for copula modeling in family studies under biased sampling
(Oxford University Press, 20160127)The heritability of chronic diseases can be effectively studied by examining the nature and extent of withinfamily associations in disease onset times. Families are typically accrued through a biased sampling scheme in ... 
Backscatter in stratified turbulence
(Elsevier, 201611)In this paper, kinetic and potential energy transfers around a spectral test fil ter scale in direct numerical simulations of decaying stratified turbulence are studied in both physical and spectral domains. It is shown ... 
Best response dynamics improve sustainability and equity outcomes in commonpool resources problems, compared to imitation dynamics
(Journal of Theoretical Biology, 20210121)Shared resource extraction among profitseeking individuals involves a tension between individual benefit and the collective wellbeing represented by the persistence of the resource. Many game theoretic models explore ... 
Biobjective shortterm scheduling in a rolling horizon framework: a priori approaches with alternative operational objectives
(Elsevier, 201911)This study addresses shortterm scheduling problems with throughput and makespan as conflicting objectives, focusing on a priori multiobjective methods. Two contributions are presented. The first contribution is to propose ... 
Bifurcation analysis and application for impulsive systems with delayed impulses
(World Scientific, 201711)In this article, we present a systematic approach to bifurcation analysis of impulsive systems with autonomous or periodic righthand sides that may exhibit delayed impulse terms. Methods include Lyapunov–Schmidt reduction ...