Results 31 to 40 of about 104,002 (268)

On local and global aspects of the 1:4 resonance in the conservative cubic H\'enon maps [PDF]

open access: yes, 2017
We study the 1:4 resonance for the conservative cubic H\'enon maps $\mathbf{C}_\pm$ with positive and negative cubic term. These maps show up different bifurcation structures both for fixed points with eigenvalues $\pm i$ and for 4-periodic orbits. While
Gonchenko, M.   +3 more
core   +2 more sources

Direct numerical simulation of the Taylor–Couette flow with the asymmetric end-wall boundary conditions

open access: yesArchives of Mechanics, 2016
In the paper the authors present the results obtained during a direct numerical simulation of the transitional Taylor–Couette flow in closed cavity. The spectral vanishing viscosity method is used to stabilize computations for higher Reynolds numbers ...
E. Tuliszka-Sznitko, K. Kiełczewski
doaj   +1 more source

Bifurcations and Slow-Fast Analysis in a Cardiac Cell Model for Investigation of Early Afterdepolarizations

open access: yesMathematics, 2020
In this study, we teased out the dynamical mechanisms underlying the generation of arrhythmogenic early afterdepolarizations (EADs) in a three-variable model of a mammalian ventricular cell.
Roberto Barrio   +3 more
doaj   +1 more source

Tipping points in open systems: bifurcation, noise-induced and rate-dependent examples in the climate system [PDF]

open access: yes, 2012
Tipping points associated with bifurcations (B-tipping) or induced by noise (N-tipping) are recognized mechanisms that may potentially lead to sudden climate change.
Ashwin, Peter   +3 more
core   +2 more sources

Theoretical and paleoclimatic evidence for abrupt transitions in the Earth system

open access: yesEnvironmental Research Letters, 2022
Specific components of the Earth system may abruptly change their state in response to gradual changes in forcing. This possibility has attracted great scientific interest in recent years, and has been recognized as one of the greatest threats associated
Niklas Boers   +2 more
doaj   +1 more source

Uniform approximations for non-generic bifurcation scenatios including bifurcations of ghost orbits

open access: yes, 1999
Gutzwiller's trace formula allows interpreting the density of states of a classically chaotic quantum system in terms of classical periodic orbits. It diverges when periodic orbits undergo bifurcations, and must be replaced with a uniform approximation ...
Arnold   +41 more
core   +2 more sources

Non-normal parameter blowout bifurcation: an example in a truncated mean field dynamo model [PDF]

open access: yes, 1997
We examine global dynamics and bifurcations occurring in a truncated model of a stellar mean field dynamo. This model has symmetry-forced invariant subspaces for the dynamics and we find examples of transient type I intermittency and blowout bifurcations
Ashwin, Peter   +2 more
core   +2 more sources

In vitro models of cancer‐associated fibroblast heterogeneity uncover subtype‐specific effects of CRISPR perturbations

open access: yesMolecular Oncology, EarlyView.
Development of therapies targeting cancer‐associated fibroblasts (CAFs) necessitates preclinical model systems that faithfully represent CAF–tumor biology. We established an in vitro coculture system of patient‐derived pancreatic CAFs and tumor cell lines and demonstrated its recapitulation of primary CAF–tumor biology with single‐cell transcriptomics ...
Elysia Saputra   +10 more
wiley   +1 more source

Adaptable Tile‐Based Pneumatic Origami through Structurally Coupled Localized Actuation

open access: yesAdvanced Engineering Materials, EarlyView.
This article presents tile‐based pneumatic origami structures with rigid tiles and flexible fabric creases, achieving adaptable properties including morphing shape, selective multistability, and tunable stiffness. Independently pressurized folding bladders at each crease enable structurally coupled localized actuation of origami structures.
Tiantian Li, Jonathan Luntz, Diann Brei
wiley   +1 more source

Period-Multiplying Bifurcations in the Gravitational Field of Asteroids

open access: yesAerospace
Periodic orbit families around asteroids serve as potential trajectories for space probes, mining facilities, and deep space stations. Bifurcations of these families provide additional candidate orbits for efficient trajectory design around asteroids ...
P. Rishi Krishna, Joel George Manathara
doaj   +1 more source

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