Results 61 to 70 of about 4,619,884 (143)

Toward an Improved Understanding of the Antarctic Coastal Zone and Its Contribution to Future Global Sea Level

open access: yesReviews of Geophysics, Volume 64, Issue 3, September 2026.
Abstract Understanding the coastal zone of the Antarctic Ice Sheet (AIS), where it interacts with the Southern Ocean and warmer air masses, is crucial for predicting Antarctica's influence on the global climate and sea level. This region has multiple tipping mechanisms that could trigger large, rapid, and potentially irreversible changes in the AIS ...
Kenichi Matsuoka   +79 more
wiley   +1 more source

Isochronous centers of Lienard type equations and applications

open access: yesJournal of Mathematical Analysis and Applications, 2007
In this work we study the equation $(E) \ddot x + f(x) \dot x^2 + g(x) = 0$ with a center at 0 and investigate conditions of its isochronicity. When $f$ and $g$ are analytic (not necessary odd) a necessary and sufficient condition for the isochronicity of 0 is given. This approach allows us to present an algorithm for obtained conditions for a point of
openaire   +3 more sources

Early Musical Predictions in the Brain as Indexed by the Mismatch Negativity—From Acoustic Deviants to Cognitive Musical Errors

open access: yesEuropean Journal of Neuroscience, Volume 64, Issue 5, September 2026.
Over the past two decades, ecologically valid music paradigms have shown that mismatch negativity (MMN) reflects a primitive musical intelligence, indexing hierarchical auditory predictions in music that parallel those observed in speech. MMN captures processing from early sensory detection in superior temporal cortices to higher order frontal ...
Elvira Brattico   +3 more
wiley   +1 more source

Limit cycles in piecewise smooth perturbations of a quartic isochronous center

open access: yesElectronic Journal of Differential Equations, 2019
This article concerns the bifurcation of limit cycles from a quartic integrable and non-Hamiltonian system. By using the first order averaging method and some mathematical technique on estimating the number of the zeros, we show that under a class of ...
Haifeng Song, Linping Peng, Yong Cui
doaj  

Reduced Motor Preparation and Altered EEG Signatures of Prediction in Autistic Adults

open access: yesEuropean Journal of Neuroscience, Volume 64, Issue 5, September 2026.
During EEG recording, autistic and non‐autistic adults were presented with auditory sequences where tones cued the probability of a subsequent imperative target. The autistic group showed less effect of cued target probability on response times and on anticipatory EEG ramping potentials.
Soroush Bagheri   +6 more
wiley   +1 more source

Isochronous Systems

open access: yes, 2008
A dynamical system is called isochronous if it features in its phase space an open, fully-dimensional region where all its solutions are periodic in all its degrees of freedom with the same, fixed period.
Calogero, Francesco
core   +1 more source

The effect of time-space compression in the Yangtze River Delta region under transportation integration: An accessibility-based analysis.

open access: yesPLoS ONE
The Yangtze River Delta (YRD) region is one of the areas in China with the highest level of transportation integration, featuring a well-developed high-speed rail network, multimodal transport system, interconnected intercity bus services, and ...
Shuo Shang, Haibing Jiang
doaj   +1 more source

Rhythm Across Species: Situating Human Speech in a Comparative Framework

open access: yesAnnals of the New York Academy of Sciences, Volume 1563, Issue 1, September 2026.
We analyzed speech rhythms from 48 human languages using methods drawn from biology and linguistics. Interonset intervals across languages are surprisingly similar, with a median value of 2 seconds., despite substantial differences in linguistic structure and prosody. A comparative rhythm analysis shows that human speech falls within the range reported
Lara S. Burchardt   +2 more
wiley   +1 more source

Limit cycles bifurcating from the period annulus of a uniform isochronous center in a quartic polynomial differential system

open access: yesElectronic Journal of Differential Equations, 2015
We study the number of limit cycles that bifurcate from the periodic solutions surrounding a uniform isochronous center located at the origin of the quartic polynomial differential system $$ \dot{x}=-y+xy(x^2+y^2),\quad \dot{y}=x+y^2(x^2+y^2 ...
Jackson Itikawa, Jaume Llibre
doaj  

Critical Review on the Development and Evolution of Beat Perception

open access: yesAnnals of the New York Academy of Sciences, Volume 1563, Issue 1, September 2026.
Beat perception—extracting a regular pulse from rhythm—supports human musicality, synchronization, and dance. Evidence suggests it is widespread across cultures, emerges at or before birth, and is rare across species. Newborn neurophysiology indicates beat‐sensitive prediction beyond simple interval timing or statistical learning, which experience and ...
Gábor Háden, Henkjan Honing
wiley   +1 more source

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