Results 61 to 70 of about 577,183 (211)

Inferring alternative ecosystem states with field survey data

Methods in Ecology and Evolution, Volume 17, Issue 8, Page 2256-2276, August 2026.
Abstract Many ecosystems potentially exhibit alternative stable states, where distinct states can coexist under identical environmental conditions. While simulation models have generated key hypotheses in alternative stable states theory, they often rely on scale‐free parameters disconnected from real ecosystems.
Ning Chen, Xiaoxue Dong, Xinwei Li, Lei Huang, Heng Huang, Changjia Li, Yanchuang Zhao, Chi Xu, Miaojun Ma, Zak Ratajczak, Changming Zhao   +10 more
wiley   +1 more source

Coexisting coherent and incoherent domains near saddle-node bifurcation

, 2015
A common external forcing can cause a saddle-node bifurcation in an ensemble of identical Duffing oscillators by breaking the symmetry of the individual bistable (double-well) unit. The strength of the forcing determines the separation between the saddle
V. K. Chandrasekar, D. V. Senthilkumar, M. Lakshmanan, R. Suresh   +3 more
core   +1 more source

A New Chaotic System With Two Stable Node-Foci Equilibria and an Unstable Saddle-Focus Equilibrium: Bifurcation and Multistability Analysis, Circuit Design, Voice Cryptosystem Application, and FPGA Implementation

IEEE Access
In the recent years, significant research interest has been devoted in the modelling and applications of chaotic systems with stable equilibria. In this research study, we propose a new 3-D chaotic system with two stable node-foci equilibria and an ...
Talal Bonny, Sundarapandian Vaidyanathan, Wafaa Al Nassan, Fareh Hannachi, Aceng Sambas   +4 more
doaj   +1 more source

Eco‐Evolutionary Dynamics of Pathogen Epidemic Timing in a Seasonal Environment

Ecology Letters, Volume 29, Issue 8, August 2026.
How are seasonal patterns of pathogen epidemics shaped by evolution? Using numerical and analytical approaches, we investigate the evolution of pathogen seasonal preferences. Our analysis identifies two selective forces driving the diversification of pathogen seasonality: seasonal priority effect and stabilising selection.
Ryuichi Kumata, Akira Sasaki
wiley   +1 more source

From SMILES Codes for Reactants and Products to Transition States With VeloxChem

Journal of Computational Chemistry, Volume 47, Issue 18, July 5, 2026.
Initial guesses for transition state optimizations are produced from a mere input of reactant and product SMILES codes, and achieved by interpolating generated force fields for reactants and products. The entire workflow scheme is implemented in the VeloxChem software.
Bastiaan van Hoorn, Patrick Norman, Mårten S. G. Ahlquist   +2 more
wiley   +1 more source

Saddle-node bifurcations of multiple homoclinic solutions in ODES

Discrete and Continuous Dynamical Systems - B, 2017
The authors study periodic perturbations of differential equations possessing a homoclinic orbit along which the tangent spaces of the corresponding stable and unstable manifolds intersect in a three-dimensional space. This paper can be seen as a continuation of the work ``Multiple transverse homoclinic solutions near a degenerate homoclinic orbit ...
Lin, Xiao-Biao, Zhu, Changrong
openaire   +1 more source

DYNAMICAL BEHAVIOR IN THE COMPETITIVE MODEL INCORPORATING THE FEAR EFFECT OF PREY DUE TO ALLELOPATHY WITH SHARED BIOTIC RESOURCES

Barekeng
This research develops a mathematical model of a natural phenomenon, namely sea snails that can release toxins (allelopathy) so that non-toxic sea snails become afraid. In addition, toxic and non-toxic sea snails share biotic resources.
Mifta Kharisma Dewi, Dian Savitri, Abadi Abadi   +2 more
doaj   +1 more source

Hidden Complexity in Stress‐Induced Phase Transformations of CeO2–ZrO2 Ceramics

Journal of the American Ceramic Society, Volume 109, Issue 7, July 2026.
Using atomistic simulations, this study reveals that the tetragonal‐to‐monoclinic transformation in zirconia is more complex than previously thought. While pure bulk zirconia often becomes trapped in metastable phases, ceria doping and free surfaces facilitate the transformation into the stable phase, aligning with experimental data.
Gaël Huynh, Jin‐Yu Zhang, Tristan Albaret, David Rodney   +3 more
wiley   +1 more source

Nonautonomous saddle-node bifurcations: Random and deterministic forcing

Journal of Differential Equations, 2012
17 pages, 5 ...
Anagnostopoulou, V., Jäger, T.
openaire   +3 more sources

Bogdanov–Takens bifurcation of a Holling IV prey–predator model with constant-effort harvesting

Journal of Inequalities and Applications, 2021
A prey–predator model with constant-effort harvesting on the prey and predators is investigated in this paper. First, we discuss the number and type of the equilibria by analyzing the equations of equilibria and the distribution of eigenvalues.
Lifang Cheng, Litao Zhang
doaj   +1 more source