Zobrazeno 1 - 10
of 13 262
pro vyhledávání: '"van Rensburg, A."'
We investigate a lattice model of comb polymers and derive bounds on the exponential growth rate of the number of embeddings of the comb. A comb is composed of a backbone that is a self-avoiding walk and a set of $t$ teeth, also modelled as mutually
Externí odkaz:
http://arxiv.org/abs/2407.21112
Autor:
Bradly, CJ, van Rensburg, EJ Janse
Polymers in confined spaces are compressed and have reduced conformational entropy, and will partially or fully escape from confinement if conditions are suitable. This is in particular the case for a polymer grafted in a pore. The escape of the poly
Externí odkaz:
http://arxiv.org/abs/2405.20103
We investigate a lattice model of comb copolymers that can adsorb at a surface and that are subject to a force causing desorption. The teeth and the backbone of the comb are chemically distinct and can interact differently with the surface. That is,
Externí odkaz:
http://arxiv.org/abs/2311.09320
We analyse a non-local parabolic integro-differential equation modelling the evolutionary dynamics of a phenotypically-structured population in a changing environment. Such models arise in a variety of contexts from climate change to chemotherapy to
Externí odkaz:
http://arxiv.org/abs/2311.00829
Autor:
Van Rensburg, Deryck J.
Publikováno v:
Journal of Business Strategy, 2023, Vol. 45, Issue 5, pp. 293-304.
Externí odkaz:
http://www.emeraldinsight.com/doi/10.1108/JBS-07-2023-0132
We extend Theorem 1 of R. Reams, A Galois approach to m-th roots of matrices with rational entries, LAA 258 (1997), 187-194. Let $p(\lambda)$ be any polynomial over $\mathbb{Q}$ and let $A\in M_n(\mathbb{Q})$ have irreducible characteristic polynomia
Externí odkaz:
http://arxiv.org/abs/2307.06303
Autor:
Pierre de Villiers, Noor Parker, Roland van Rensburg, Pierre Goussard, Carine Marks, Veshni Pillay-Fuentes Lorente
Publikováno v:
Toxicology Reports, Vol 12, Iss , Pp 18-22 (2024)
Methamidophos is a highly hazardous organophosphate and is known to cause an acute cholinergic toxidrome. Methamidophos use is not allowed in South Africa and therefore local data pertaining to methamidophos poisoning is very limited, with no paediat
Externí odkaz:
https://doaj.org/article/b4fd5f8ebfcf4930988cbca2e54ed3d7
Autor:
van Rensburg, EJ Janse
The distribution of monomers in a coating of grafted and adsorbing polymers is modelled using a grafted staircase polygon in the square lattice. The adsorbing staircase polygon consists of a bottom and a top lattice path (branches) and the asymptotic
Externí odkaz:
http://arxiv.org/abs/2304.13562
Publikováno v:
Journal of Applied Research in Higher Education, 2023, Vol. 16, Issue 3, pp. 677-692.
Externí odkaz:
http://www.emeraldinsight.com/doi/10.1108/JARHE-04-2022-0126
Autor:
van Rensburg, EJ Janse
A linear polymer grafted to a hard wall and underneath an AFM tip can be modelled in a lattice as a grafted lattice polymer (or self-avoiding walk) compressed underneath a piston approaching the wall. As the piston approaches the wall the increasingl
Externí odkaz:
http://arxiv.org/abs/2301.12446