Results 41 to 50 of about 4,711,203 (306)

The Liapunov Center Theorem for a Class of Equivariant Hamiltonian Systems

open access: yesAbstract and Applied Analysis, 2012
We consider the existence of the periodic solutions in the neighbourhood of equilibria for 𝐶∞ equivariant Hamiltonian vector fields. If the equivariant symmetry 𝑆 acts antisymplectically and 𝑆2=𝐼, we prove that generically purely imaginary eigenvalues ...
Jia Li, Yanling Shi
doaj   +1 more source

A dynamic analysis of a prey–predator population model with a nonlinear harvesting rate [PDF]

open access: yesArab Journal of Mathematical Sciences
Purpose – In this article, the author discusses dynamical behaviors of a prey-predator population model with nonlinear harvesting rate and offers a mathematical analysis of the model.
Nadia Mohdeb
doaj   +1 more source

Design and analysis strategies for robust microbiome ageing research

open access: yesFEBS Letters, EarlyView.
The gut microbiome changes with age and associates with age‐related morbidity and mortality, establishing it as a potential biomarker and intervention target for ageing. Realising this potential requires methodological rigour, yet distinguishing biological signals from methodological artefacts remains challenging across cohorts. This review provides an
Mark Olenik   +5 more
wiley   +1 more source

The minimal entropy problem for 3-manifolds with zero simplicial volume [PDF]

open access: yes, 2003
In this note, we consider the minimal entropy problem, namely the question of whether there exists a smooth metric of minimal (topological) entropy, for certain classes of closed 3 ...
Anderson, J.W., Paternain, G.P.
core   +1 more source

Asymptotic Integration of Certain Differential Equations in Banach Space

open access: yesМоделирование и анализ информационных систем, 2017
We investigate the problem of constructing the asymptotics for weak solutions of certain class of linear differential equations in the Banach space as the independent variable tends to infinity.
Pavel N. Nesterov
doaj   +1 more source

ABL kinase‐dependent phosphorylation of SH proteins promotes their direct interaction with CRK family SH2 domains

open access: yesFEBS Letters, EarlyView.
CT10 regulator of kinase (CRK) and CRK‐Like (CRKL) are signaling adaptors driving cell adhesion, motility, differentiation, and proliferation. SH2‐domain containing (SH) proteins are enriched in YXXP motifs which when phosphorylated create preferred binding sites for CRK family SH2 domains.
Phoebe M. Cousens   +8 more
wiley   +1 more source

Center manifolds for random dynamical systems with generalized trichotomies

open access: yesElectronic Journal of Qualitative Theory of Differential Equations
In this paper, we consider small perturbations of linear Random Dynamical Systems evolving on a Banach space and admitting a general form of trichotomy.
António Bento, Helder Vilarinho
doaj   +1 more source

Bifurcation Analysis and Spatiotemporal Patterns of Nonlinear Oscillations in a Ring Lattice of Identical Neurons with Delayed Coupling

open access: yesAbstract and Applied Analysis, 2014
We investigate the dynamics of a delayed neural network model consisting of n identical neurons. We first analyze stability of the zero solution and then study the effect of time delay on the dynamics of the system.
Jiao Jiang, Yongli Song
doaj   +1 more source

The State Space Subdivision Filter for Estimation on SE(2)

open access: yesSensors, 2021
The SE(2) domain can be used to describe the position and orientation of objects in planar scenarios and is inherently nonlinear due to the periodicity of the angle.
Florian Pfaff   +2 more
doaj   +1 more source

An epithelial GPR35 isoform supports tumor‐associated transcriptional and metabolic phenotypes

open access: yesFEBS Letters, EarlyView.
GPR35 generates two functionally distinct isoforms with previously unresolved roles. GPR35‐short mediates immune‐cell chemotaxis, while GPR35‐long is enriched in colorectal cancer epithelium, where it supports increased metabolism, proliferation, and tumor‐associated transcriptional programs.
Jørgen D. Rønneberg   +14 more
wiley   +1 more source

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