Browsing Research Articles (Mathematical Sciences) by Title
Now showing items 4665 of 79

Niche construction on environmental gradients : the formation of fitness valley and stratified genotypic distributions
(PLoS, 20140610)The process of niche construction can alter the trajectory of natural selection through organismenvironment feedback. As such, the mechanism and impact of niche construction can be better investigated along environmental ... 
No evidence for extensions to the standard cosmological model
(American Physical Society, 2017)We compute the Bayesian evidence for models considered in the main analysis of Planck cosmic microwave background data. By utilizing carefully defined nearestneighbor distances in parameter space, we reuse the Monte Carlo ... 
NonNegative Matrix Factorization for Learning AlignmentSpecific Models of Protein Evolution
(PLOS, 20111222)Models of protein evolution currently come in two flavors: generalist and specialist. Generalist models (e.g. PAM, JTT, WAG) adopt a onesizefitsall approach, where a single model is estimated from a number of different ... 
On new high order quasilinearization approaches to the nonlinear model of catalytic reaction in a flat particle
(Hindawi Publishing Corporation, 2013)A novel computational approach known as pseudospectral quasilinearization (SQLM) is employed to tackle the twopoint boundary value problem describing the reactivity behaviour of porous catalyst particles subject to both ... 
On qQuasiadditive and qQuasimultiplicative Functions
(Electronic Journal of Combinatorics, 2017)In this paper, we introduce the notion of qquasiadditivity of arithmetic functions, as well as the related concept of qquasimultiplicativity, which generalise strong qadditivity and multiplicativity, respectively. ... 
On the transmission dynamics of Buruli ulcer in Ghana : insights through a mathematical model
(BioMed Central, 20151106)Background: Mycobacterium ulcerans is know to cause the Buruli ulcer. The association between the ulcer and environmental exposure has been documented. However, the epidemiology of the ulcer is not well understood. ... 
On the validity of evolutionary models with sitespecific parameters
(PLoS, 20140410)Evolutionary models that make use of sitespecific parameters have recently been criticized on the grounds that parameter estimates obtained under such models can be unreliable and lack theoretical guarantees of convergence. ... 
An optimal proportion of mixing broadleaved forest for enhancing the effective productivity of moso bamboo
(John Wiley & Sons Ltd., 20150317)Moso bamboos (Phyllostachys edulis) are important forestry plants in southern China, with substantial roles to play in regional economic and ecological systems. Mixing broadleaved forests and moso bamboos is a common ... 
Parabolic curve fitting study subject to Joule heating in MHD thermally stratified mixed convection stagnation point flow of EyringPowell fluid induced by an inclined cylindrical surface
(Elsevier, 2018)The current analysis is carried out to envision the properties of magnetohydrodynamic boundary layer stagnation point flow of EyringPowell (nonNewtonian) fluid induced by an inclined stretching cylindrical surface in ... 
Partitioning the hypercube Qn into n isomorphic edgedisjoint trees
(TU Graz University of Technology, 2011)ENGLISH ABSTRACT: The problem of finding edgedisjoint trees in a hypercube e.g. arises in the context of parallel computing. Independent of applications it is of high aesthetic appeal. 
Paths vs. stars in the local prole of trees
(Electronic Journal of Combinatorics, 2017)The aim of this paper is to provide an affirmative answer to a recent question by Bubeck and Linial on the local profile of trees. 
Population dynamics and associated factors of cereal aphids and armyworms under global change
(Springer Nature, 20151222)Studying the impacts of global change, which comprises largely climate and landscape changes, on agricultural pests is crucial for developing sustainable pest management. This research is focused on understanding the ... 
Propertybased slicing for agent verification
(Oxford University Press (OUP), 200912)Programming languages designed specifically for multiagent systems represent a new programming paradigm that has gained popularity over recent years, with some multiagent programming languages being used in increasingly ... 
Protection number in plane trees
(University of Belgrade  School of Electrical Engineering, 201710)The protection number of a plane tree is the minimal distance of the root to a leaf; this definition carries over to an arbitrary node in a plane tree by considering the maximal subtree having this node as a root. We ... 
Quantifying multiplesite compositional turnover in an Afrotemperate forest, using zeta diversity
(SpringerOpen, 2018)Background: Species turnover is typically measured by partitioning diversity components into alpha and pairwise beta diversity. However, alpha and beta components cannot express the full spectrum of multiplesite ... 
Realization of abstract convex geometries by point configurations
(Elsevier, 201001)The EdelmanJamison problem is to characterize those abstract convex geometries that are representable by a set of points in the plane. We show that some natural modification of the EdelmanJamison problem is equivalent ... 
Representing derivatives of Chebyshev polynomials by Chebyshev polynomials and related questions
(De Gruyter, 2017)A recursion formula for derivatives of Chebyshev polynomials is replaced by an explicit formula. Similar formulae are derived for scaled Fibonacci numbers. 
Robustness of rigid and adaptive networks to species loss
(Public Library of Science, 2017)Controversies in the complexitystability debate have been attributed to the methodologies used such as topological vs. dynamical approaches or rigid vs. adaptive foraging behaviour of species. Here, we use a bipartite ... 
The seesaw effect of winter temperature change on the recruitment of cotton bollworms Helicoverpa armigera through mismatched phenology
(John Wiley & Sons Ltd., 2015)Knowing how climate change affects the population dynamics of insect pests is critical for the future of integrated pest management. Rising winter temperatures from global warming can drive increases in outbreaks of some ... 
A simulation agespecific tuberculosis model for the Cape Town metropole
(Academy of Science of South Africa, 20130918)Tuberculosis (TB) continues to present an insurmountable health burden in the Western Cape Province of South Africa. TB dynamics in adults is different from that in children, with the former determining the latter. Because ...