Results 21 to 30 of about 399 (175)
Linearizability Problem of Resonant Degenerate Singular Point for Polynomial Differential Systems
Journal of Applied Mathematics, 2012 The linearizability (or isochronicity) problem is one of the open problems for polynomial differential systems which is far to be solved in general. A progressive way to find necessary conditions for linearizability is to compute period constants.
Yusen Wu, Cui Zhang, Luju Liu
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The Problem of Bicenter and Isochronicity for a Class of Quasi Symmetric Planar Systems
Abstract and Applied Analysis, 2014 We study a class of quasi symmetric seventh degree systems and obtain the conditions that its two singular points can be two centers at the same step by careful computing and strict proof. In addition, the condition of an isochronous center is also given.
Du Chaoxiong
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Beat Hierarchy and Beat Patterns—From Aksak to Composite Meter
Current Musicology, 2014 In his study of Steve Reich’s phase–shifting music, Richard Cohn points to a specific analytical challenge that transcends the repertoire at hand: “Given the relative poverty of our rhythmic terminology, the challenge for the theorist is to discover a ...
Aleksandra Vojcic
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Classification of the centers, their cyclicity and isochronicity for the generalized quadratic polynomial differential systems [PDF]
, 2009 In this paper we classify the centers, the cyclicity of their Hopf bifurcation and the isochronicity of the polynomial differential systems in R2 of degree d that in complex notation z=x+iy can be written asz˙=(λ+i)z+(zz¯)d−22(Az2+Bzz¯+Cz¯2), where d⩾2 ...
Valls, Clàudia, Llibre, Jaume
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Rhythm Across Species: Situating Human Speech in a Comparative Framework
Annals 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
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Classification of the centers, their cyclicity and isochronicity for a class of polynomial differential systems generalizing the linear systems with cubic homogeneous nonlinearities [PDF]
, 2009 In this paper we classify the centers, the cyclicity of its Hopf bifurcation and their isochronicity for the polynomial differential systems in R2 of arbitrary degree d⩾3 odd that in complex notation z=x+iy can be written asz˙=(λ+i)z+(zz¯)d−32(Az3+Bz2z ...
Valls, Clàudia, Llibre, Jaume
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Spatial distribution of acoustic traits in bird assemblages along regional bioclimatic gradients
Ecography, Volume 2026, Issue 6, June 2026.Environmental variation shapes acoustic interactions among birds, creating spatial structures in the sonic signature of local species assemblages. Exploring these patterns at regional scales can reveal processes that segregate acoustic strategies along environmental gradients.
Michela Busana +11 more
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Period function monotonicity of planar vector fields [PDF]
, 2009 In this paper, we study planar differential systems possessing a center at the origin. We introduce functional conditions for centers and obtain sufficient conditions for monotonicity of period function and isochronicity of the center of systems of ODE ...
Al-Dosary, Khalil I.T.
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Aging Cell, Volume 25, Issue 4, April 2026.A 14‐protein extracellular matrix aging clock derived from circulating matrisome proteins predicts chronological and biological age across cohorts and biofluids, distinguishes health from disease, and is modulated by rejuvenation interventions in mice, enabling the nomination of potential ECM targets for drug discovery to promote healthy aging ...
Loet Coenen +4 more
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Optics and beam dynamics study of the ISOLDE superconducting recoil separator
Nuclear Engineering and TechnologyThe spectrometry of radionuclides is a key area in nuclear physics, driven by the global quest to discover and characterize exotic isotopes. We propose a versatile and compact storage ring, the ISOLDE Superconducting Recoil Separator (ISRS), envisioned ...
Fazel Taft +4 more
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