Results 71 to 80 of about 5,152,512 (204)

Bifurcation curves of subharmonic solutions and Melnikov theory under degeneracies

, 2007
We study perturbations of a class of analytic two-dimensional autonomous systems with perturbations depending periodically on time; for instance one can imagine a periodically driven or forced system with one degree of freedom.
BARTUCCELLI M. V, GENTILE, Guido, DEANE J. H. B.   +2 more
core   +2 more sources

Democratizing Hydroclimate Science for Just and Resilient Futures

Earth's Future, Volume 14, Issue 8, August 2026.
Abstract Hydroclimatic extremes are intensifying, escalating risks to ecosystems, infrastructure, and vulnerable communities. Rapid technological innovation and scientific discovery offer powerful tools to address these challenges, yet a gap remains between hydroclimate knowledge production and its use in decision‐making.
K. M. Whitney, J. Cranko Page, A. Dengri, S. Hina, H. Okachi, V. Rabanal, J. Sirisena, Y. A. Yılmaz, P. N. Afego, A. Arshad, L. Baratgin, L. M. Cappelletti, C. N. Gulizia, S. M. A. Habib, Q. He, J. Hsu, M. R. Islam, S. Kulkarni, L. Lebedeva, S. K. Mandal, A. V. Matus, U. Mondal, P. L. Nguyen, U. K. Okoro, D. Pradhananga, M. Sabot, P. Saha, A. Suzuki, A. Tejada   +28 more
wiley   +1 more source

Solitary Waves of Moderate Amplitude and Dispersive Radiation in the Serre Equations: The Extended KdV–Whitham Approximation

Studies in Applied Mathematics, Volume 157, Issue 2, August 2026.
ABSTRACT We consider the extended Korteweg–de Vries (eKdV) equation as a model for long moderately nonlinear surface water waves and use it to describe the evolution of initial conditions generating solitary waves with and without significant dispersive radiation, as well as cases of pure dispersive radiation without any solitary waves.
Benjamin Martin, Dmitri Tseluiko, Karima Khusnutdinova   +2 more
wiley   +1 more source

Splitting potential and Poincaré-Melnikov method for whiskered tori in Hamiltonian Systems [PDF]

, 1999
We deal with a perturbation of a hyperbolic integrable Hamiltonian system with n+1 degrees of freedom. The integrable system is assumed to have n-dimensional hyperbolic invariant tori with coincident whiskers (separatrices). Following Eliasson, we use a
Delshams Valdés, Amadeu, Gutiérrez Serrés, Pere   +1 more
core   +1 more source

The Chaotic Property of BTA Deep-Hole Machining System under the Effect of Inner Cutting Fluid

Shock and Vibration, 2023
To clarify the action mechanism of parameter change on system stability, the chaotic property of BTA deep-hole machining system under the effect of inner cutting fluid was analyzed. According to the kinematic characteristics of the internal cutting fluid
Quanbin Zhang, Wu Zhao, Yamin Li, Shuangxi Jing   +3 more
doaj   +1 more source

Refined Modeling of Arctic Circumpolar Building Stock Increases Estimated Mid‐Century Permafrost Degradation Damages

Earth's Future, Volume 14, Issue 7, July 2026.
Abstract Near‐surface permafrost degradation has the potential to damage infrastructure needed to sustain Arctic communities, but risk assessments remain highly uncertain due to a limited representation of the Arctic circumpolar building stock. With deep learning building footprint detection and building occupancy classification models, we expand the ...
E. Manos, D. A. Streletskiy, C. Witharana, E. Haggerty, A. K. Liljedahl   +4 more
wiley   +1 more source

Periodically Forced Nonlinear Oscillatory Acoustic Vacuum

Axioms, 2018
In this work, we study the in-plane oscillations of a finite lattice of particles coupled by linear springs under distributed harmonic excitation. Melnikov-type analysis is applied for the persistence of periodic oscillations of a reduced system.
Makrina Agaoglou, Michal Fečkan, Michal Pospíšil, Vassilis M. Rothos, Alexander F. Vakakis   +4 more
doaj   +1 more source

The Political Economy of Attention: Media Salience, Voter Cognition, and Electoral Accountability

Journal of Economic Surveys, Volume 40, Issue 3, Page 1173-1193, July 2026.
ABSTRACT We review conceptual and empirical contributions to the political economy of attention, with a focus on how attention allocation shapes political behavior and electoral accountability. The review distinguishes between endogenous (goal‐directed) and exogenous (stimulus‐driven) attention and examines how these concepts are incorporated into ...
Patrick Balles, Ulrich Matter, Alois Stutzer   +2 more
wiley   +1 more source

The Melnikov method and Shilnikov bifurcations

, 2021
Ο κύριος στόχος αυτής της εργασίας είναι η συστηματική εισαγωγή στη θεωρία ομοκλινικών διακλαδώσεων σε μη αυτόνομα δυναμικά συστήματα δεύτερης τάξης και αυτόνομα δυναμικά συστήματα στον R^3.
Χαλού Λούλα, Chalou Loula
core   +1 more source

Chaos in a Generalized Perturbed Lotka–Volterra Model

Mathematics
In this paper we investigate the chaos of a generalized perturbed Lotka–Volterra model based on considerations by other studies used in the literature. The model, containing N number of free parameters, could be of interest to specialists working in the ...
Nikolay Kyurkchiev, Tsvetelin Zaevski, Anton Iliev, Vesselin Kyurkchiev, Angel Golev, Asen Rahnev   +5 more
doaj   +1 more source