Results 51 to 60 of about 62,585 (218)
ChemSystemsChem, Volume 8, Issue 5, September 2026.A closed chemo‐mechanical feedback system is constructed using a GOx/urease core–shell hydrogel with pH‐responsive microcapsules. Proton generation triggers urea release, activating urease and restoring pH, resulting in autonomous swelling–deswelling oscillations.
Shohei Shinbo +3 more
wiley +1 more source
SIMPLEST NORMAL FORMS OF HOPF AND GENERALIZED HOPF BIFURCATIONS
, 1999 The normal forms of Hopf and generalized Hopf bifurcations have been extensively studied, and obtained using the method of normal form theory and many other different approaches.
P. YU
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Advances in Difference Equations, 2020 In many areas, researchers might think that a differential equation model is required, but one might be forced to use an approximate difference equation model if data is only available at discrete points in time.
Rachadawan Darlai +2 more
doaj +1 more source
Hamiltonian Hopf Bifurcation with Symmetry [PDF]
Archive for Rational Mechanics and Analysis, 2002 35 pages, 3 ...
Chossat, Pascal +2 more
openaire +4 more sources
Journal of Neuroendocrinology, Volume 38, Issue 9, September 2026.Abstract The hypothalamic–pituitary–adrenal (HPA) axis is a vital neuroendocrine system that maintains homeostasis by regulating stress hormone secretion through tightly controlled circadian and ultradian rhythms. Although rodent studies and mathematical models have clarified the mechanisms of ultradian pulsatility, a quantitative, human‐specific ...
Belinda Lombard +7 more
wiley +1 more source
Álgebras de Hopf trançadas [PDF]
, 2013 Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas, Programa de Pós-Graduação em Matemática Pura e Aplicada, Florianópolis, 2013Álgebras de Nichols são ferramentas importantes para a classificação de
Pinter, Sara Regina da Rosa
core
Rigorous verification of Hopf bifurcations via desingularization and continuation [PDF]
, 2021 In this paper we present a general approach to rigorously validate Hopf bifurcations as well as saddlenode bifurcations of periodic orbits in systems of ODEs.
Queirolo, Elena +3 more
core +2 more sources
Studies in Applied Mathematics, Volume 157, Issue 3, September 2026.ABSTRACT We show that the removal of a type of reverse reactions preserves the absence of Hopf bifurcations in mass‐action reaction networks, or more precisely, the absence of single pairs of purely imaginary eigenvalues of the Jacobian of the system. The motivation is to answer the open question of whether the dual phosphorylation mechanism requiring ...
Elisenda Feliu, Nidhi Kaihnsa
wiley +1 more source
Analysis of pattern dynamics for a nonlinear model of the human cortex via bifurcation theories [PDF]
, 2014 This thesis examines the bifurcations, i.e., the emergent behaviours, for the Waikato cortical model under the influence of the gap-junction inhibitory diffusion D₂ (identified as the Turing bifurcation parameter) and the time-to-peak for hyperpolarising
Wang, Kaier
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Hopf bifurcations for a delayed discrete single population patch model in advective environments
European Journal of Applied MathematicsIn this paper, we consider a delayed discrete single population patch model in advective environments. The individuals are subject to both random and directed movements, and there is a net loss of individuals at the downstream end due to the flow into a ...
Weiwei Liu, Zuolin Shen, Shanshan Chen
doaj +1 more source