Results 81 to 90 of about 6,930 (179)

Hydrodynamic modeling of deconfinement phase transition in heavy-ion collisions at NICA-FAIR energies

open access: yes, 2011
We use (3+1) dimensional ideal hydrodynamics to describe the space-time evolution of strongly interacting matter created in Au+Au and Pb+Pb collisions. The model is applied for the domain of bombarding energies 1-160 AGeV which includes future NICA and ...
A. S. Roshal   +12 more
core   +1 more source

A Perspective of Multi‐Reflecting TOF MS

open access: yesMass Spectrometry Reviews, Volume 45, Issue 3, Page 476-506, May/June 2026.
ABSTRACT Time‐of‐flight mass spectrometry (TOF MS) excels in rapid and high‐sensitivity analysis, making it a cornerstone of analytical chemistry. But as sample complexity explodes in omics studies, so does the need for higher resolving power to ensure accurate results.
A. N. Verenchikov   +3 more
wiley   +1 more source

Centers and isochronous centers of a class of quasi-analytic switching systems

open access: yesScience China Mathematics, 2018
In this paper, we study the integrability and linearization of a class of quadratic quasi-analytic switching systems. We improve an existing method to compute the focus values and periodic constants of quasi-analytic switching systems. In particular, with our method, we demonstrate that the dynamical behaviors of quasi-analytic switching systems are ...
Li, Feng   +3 more
openaire   +3 more sources

The Ontogeny of Vocal Rhythms in a Non‐Human Primate

open access: yesDevelopmental Science, Volume 29, Issue 3, May 2026.
ABSTRACT Rhythm is a fundamental aspect of human behaviour, and musical rhythm provides one of its most elaborate instances. Unlike speech, this rhythmic behaviour is characterized by the production of temporal patterns structured around small‐integer ratios, which emerge early in life and change systematically across development.
Lia Laffi   +11 more
wiley   +1 more source

Pendulum: separatrix splitting

open access: yes, 1997
An exact expression for the determinant of the splitting matrix is derived: it allows us to analyze the asympotic behaviour needed to amend the large angles theorem proposed in Ann. Inst. H. Poincar\'e, B-60, 1, 1994.
Gallavotti, G.   +2 more
core   +2 more sources

Clumped Isotope Temperature Reconstruction Using Stalagmite Drip Cups

open access: yesRapid Communications in Mass Spectrometry, Volume 40, Issue 8, 30 April 2026.
ABSTRACT Rationale Application of clumped isotope palaeothermometry to speleothems (carbonate cave deposits, e.g., stalagmites and flowstones) has been restricted largely to subaqueous samples because of kinetic fractionation processes that occur during subaerial speleothem formation, which lead to erroneously high inferred temperatures.
Stuart Umbo   +11 more
wiley   +1 more source

Airborne Radar Reveals Area‐Wide Decadal Increase of Surface Mass Balance on the Plateau in Dronning Maud Land, East Antarctica

open access: yesGeophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract Projections of Antarctica's sea‐level contribution depend on future changes in surface mass balance (SMB), yet it remains uncertain whether climate change has already impacted SMB on the East Antarctic Plateau, given diverging trends in prior studies.
Alexandra M. Zuhr   +7 more
wiley   +1 more source

Perturbed rigidly isochronous centers and their critical periods

open access: yesJournal of Mathematical Analysis and Applications, 2017
Consider a planar system which has a center at the origin. Call \(T(\eta)\) the period of the orbit passing through \((\eta,0)\). When \(T'(\eta^*)=0\), for some \(\eta^*\), the period \(T(\eta^*)=0\) is called \textit{critical}. Also recall that a center is \textit{isochronous} if the function \(T\) is constant and \textit{rigidly isochronous} if in ...
Linping Peng   +2 more
openaire   +2 more sources

Isochronicity of centers in a switching Bautin system

open access: yesJournal of Differential Equations, 2012
Isochronicity of centers for a class of discontinuous differential system, simply called switching system, is discussed. Some sufficient conditions for the system to have a regular isochronous center at the origin are given and a switching system with an irregular isochronous center at the origin is constructed.
Chen, Xingwu, Zhang, Weinian
openaire   +2 more sources

On the critical periods of perturbed isochronous centers

open access: yesJournal of Differential Equations, 2008
"Vegeu el resum a l'inici del document del fitxer adjunt."
Gasull i Embid, Armengol, Yu, Jiang
openaire   +3 more sources

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