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Article
Evidence for a new regime shift between floating and submerged invasive plant dominance in South Africa
Classical biological control for the management of floating invasive plants has been highly successful in South Africa. However, restoring ecosystem services has been compromised by a new suite of submerged in...
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Article
Synergies between research organisations and the wider community in enhancing weed biological control in South Africa
Biological control offers a cost effective and ecologically sustainable tool for the management of invasive alien plants. Its implementation, however, has historically been slow and poorly co-ordinated. In Sou...
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Article
AIM2 and NLRP3 inflammasomes activate both apoptotic and pyroptotic death pathways via ASC
Inflammasomes are protein complexes assembled upon recognition of infection or cell damage signals, and serve as platforms for clustering and activation of procaspase-1. Oligomerisation of initiating proteins ...
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Article
Stable isotope analysis indicates a lack of inter- and intra-specific dietary redundancy among ecologically important coral reef fishes
Parrotfish are critical consumers on coral reefs, mediating the balance between algae and corals, and are often categorised into three functional groups based on adult morphology and feeding behaviour. We used...
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Article
Modeling on ion rejection using membranes comprising ultra-small radii carbon nanotubes
In this paper, we investigate the complete ion rejection using carbon nanotube membranes comprising ultra-small radii nanotubes. Three acceptance radii for a water molecule, a sodium ion and a chloride ion ar...
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Article
Packing configurations for methane storage in carbon nanotubes
In this paper we investigate methane packing in single-walled carbon nanotubes. We employ classical applied mathematical modelling using the basic principles of mechanics to exploit the Lennard-Jones potentia...
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Article
Some novel plane trajectories for carbon atoms and fullerenes captured by two fixed parallel carbon nanotubes
The movement of atoms and molecules at the nanoscale constitutes a fundamental problem in physics, especially following the motion of atoms in many-body systems condensing together to form molecular structure...
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Article
Infiltration from supply at constant water content: an integrable model
An integrable version of Richards’ equation for time-dependent unidimensional flow in unsaturated soil is subjected to boundary conditions of constant water content. The nonlinear boundary problem is transform...
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Article
Newtonian flow with nonlinear Navier boundary condition
The generalized nonlinear Navier boundary condition advocated by Thompson and Troian in the journal Nature, and motivated from molecular dynamical simulations, is applied to the conventional continuum mechanical ...
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Article
Continuum modelling of spherical and spheroidal carbon onions
Carbon nanostructures are of considerable interest owing to their unique mechanical and electronic properties. Experimentally, a wide variety of different shapes are obtained, including both spherical and sphe...
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Chapter and Conference Paper
Modelling the Thermal Conductivity of Nanofluids
The interaction of nano particulates with conventional materials generally has the effect of dramatically changing all the physical parameters of the material, which normally characterize the bulk material. Th...
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Article
FADD self-association is required for stable interaction with an activated death receptor
Receptor-mediated programmed cell death proceeds through an activated receptor to which the death adaptor FADD and the initiator procaspases 8 and/or 10 are recruited following receptor stimulation. The adapto...
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Chapter and Conference Paper
A Survey of Some Mathematical Results for Highly Frictional Granular Materials
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Article
Mathematics and mechanics of granular materials
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Article
Perturbation solutions for flow through symmetrical hoppers with inserts and asymmetrical wedge hoppers
Under certain circumstances, an industrial hopper which operates under the “funnel-flow” regime can be converted to the “mass-flow” regime with the addition of a flow-corrective insert. This paper is concerned...
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Article
Perturbation solutions for flow through symmetrical hoppers with inserts and asymmetrical wedge hoppers
Under certain circumstances, an industrial hopper which operates under the “funnel-flow” regime can be converted to the “mass-flow” regime with the addition of a flow-corrective insert. This paper is concerned...
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Article
Mathematics and mechanics of granular materials
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Chapter
Mathematics and mechanics of granular materials
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Chapter
Perturbation solutions for flow through symmetrical hoppers with inserts and asymmetrical wedge hoppers
Under certain circumstances, an industrial hopper which operates under the “funnel-flow” regime can be converted to the “mass-flow” regime with the addition of a flow-corrective insert. This paper is concerned...
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Article
A formal exact mathematical solution for a slo** rat-hole in a highly frictional granular solid
This paper provides a formal exact analytical solution to a rat-hole with a slo** base in two and three dimensions for a highly frictional granular material. A rat-hole is the general term used to describe t...
