Now showing items 21-30 of 221
Scaling Limits and Generic Bounds for Exploration Processes
We consider exploration algorithms of the random sequential adsorption type both for homogeneous random graphs and random geometric graphs based on spatial Poisson processes. At each step, a vertex of the graph becomes ...
A Symbiotic Self-cross Diffusion Model
(Khayyam Publishing, 2014)
Fluctuations, Correlations and the Estimation of Concentrations inside Cells
(Public Library of Science, 2016-03)
Information transmission in cells occurs quite accurately even when concentration changes are ?read? by individual binding sites. In this paper we study ligand number and site occupancy fluctuations when ligands diffuse ...
The effect of reactions on the formation and readout of the gradient of Bicoid
(IOP Publishing, 2017-02)
During early development, the establishment of gradients of transcriptional factors determinesthe patterning of cell fates. The case of Bicoid (Bcd) in Drosophila melanogaster embryos is welldocumented and studied. There ...
Spatio-temporal dynamics and transition from asymptotic equilibrium to bounded oscillations in Chrysomya albiceps (Diptera, Calliphoridae)
(Instituto Oswaldo Cruz, Ministério da Saúde, 2001-07-01)
The sensitivity of parameters that govern the stability of population size in Chrysomya albiceps and describe its spatial dynamics was evaluated in this study. The dynamics was modeled using a density-dependent model of ...
Asymptotic behavior for a nonlocal diffusion equation in exterior domains: the critical two-dimensional case
(Elsevier Inc, 2016-04)
We study the long time behavior of bounded, integrable solutions to a nonlocal diffusion equation, ∂tu = J ∗ u − u, where J is a smooth, radially symmetric kernel with support Bd(0) ⊂ R2. The problem is set in an exterior ...
An Algorithm for Evaluating Reaction Rates of Catalytic Reaction Networks with Strong Diffusion Limitations
(Pergamon-Elsevier Science Ltd, 2001-09)
An h-adaptive mesh procedure to solve the reaction-diffusion problem for multiple reactions in catalytic pellets presenting strong diffusion limitations is developed. The discretization approach selected for this purpose ...
Steady state analysis for a relaxed cross diffusion model
In this article we study the existence the existence of nonconstant steady state solutions for the following relaxed cross-diffusion system [fórmula] with a bounded smooth domain, n the outer unit normal to @ , > ...
Extractability of Copper and Application of Diffusive Gradients in Thin Films: Metal Availability in Contaminated Soil by Biosolids
(Sociedade Brasileira de Química, 2013)
The aim of this study was to use the technique of diffusion gradients in thin films (DGT) to evaluate the availability of copper in soil with high presence of this metal treated with biosolids, and to compare this ...