CHAOS: All Topics http://scitation.aip.org/ CHAOS: All Topics Theoretical considerations for mapping activation in human cardiac fibrillation http://link.aip.org/link/?CHA/23/023113/1&agg=rss Wouter-Jan Rappel and Sanjiv M. Narayan<br/> Defining mechanisms for cardiac fibrillation is challenging because, in contrast to other arrhythmias, fibrillation exhibits complex non-repeatability in spatiotemporal activation but paradoxically exhibits conserved spatial gradients in rate, dominant frequency, and electrical propagation. Unlike a ... [Chaos 23, 023113 (2013)] published Thu May 23, 2013. Comparisons of purely topological model, betweenness based model and direct current power flow model to analyze power grid vulnerability http://link.aip.org/link/?CHA/23/023114/1&agg=rss Min Ouyang<br/> This paper selects three frequently used power grid models, including a purely topological model (PTM), a betweennness based model (BBM), and a direct current power flow model (DCPFM), to describe three different dynamical processes on a power grid under both single and multiple component failures. ... [Chaos 23, 023114 (2013)] published Thu May 23, 2013. A nonlinear analysis of the transport Barkhausen-like noise measured in (Bi,Pb)SrCaCuO superconductors http://link.aip.org/link/?CHA/23/023116/1&agg=rss I. Garcia-Fornaris, H. Millan, R. F. Jardim, and E. Govea-Alcaide<br/> We investigated the transport Barkhausen-like noise (TBN) by using nonlinear time series analysis. TBN signals were measured in (Bi,Pb)SrCaCuO ceramic samples subjected to different uniaxial compacting pressures (UCP). These samples display similar intragranular properties but different intergranula ... [Chaos 23, 023116 (2013)] published Thu May 23, 2013. Chemical patterns in translating vortices: Inter- and intra-cellular mixing effects http://link.aip.org/link/?CHA/23/023115/1&agg=rss Antoine Vallatos, Rhys Evans, Barnaby W. Thompson, Annette F. Taylor, and Melanie M. Britton<br/> Stationary chemical patternsflow distributed oscillations (FDOs)are obtained when the Belousov-Zhabotinsky reaction is coupled with translating vortex flow in a Vortex Flow Reactor. For certain conditions, the FDOs are unstable with the observation of disappearing bands or complex patterns. The tran ... [Chaos 23, 023115 (2013)] published Thu May 23, 2013. Shunting inhibitory cellular neural networks with chaotic external inputs http://link.aip.org/link/?CHA/23/023112/1&agg=rss M. U. Akhmet and M. O. Fen<br/> Taking advantage of external inputs, it is shown that shunting inhibitory cellular neural networks behave chaotically. The analysis is based on the Li-Yorke definition of chaos. Appropriate illustrations which support the theoretical results are depicted. ... [Chaos 23, 023112 (2013)] published Fri May 17, 2013. Four dimensional chaos and intermittency in a mesoscopic model of the electroencephalogram http://link.aip.org/link/?CHA/23/023111/1&agg=rss Mathew P. Dafilis, Federico Frascoli, Peter J. Cadusch, and David T. J. Liley<br/> The occurrence of so-called four dimensional chaos in dynamical systems represented by coupled, nonlinear, ordinary differential equations is rarely reported in the literature. In this paper, we present evidence that Liley's mesoscopic theory of the electroencephalogram (EEG), which has been used to ... [Chaos 23, 023111 (2013)] published Thu May 9, 2013. Experimental distinction between chaotic and strange nonchaotic attractors on the basis of consistency http://link.aip.org/link/?CHA/23/023110/1&agg=rss Seiji Uenohara, Takahito Mitsui, Yoshito Hirata, Takashi Morie, Yoshihiko Horio et al.<br/> We experimentally study strange nonchaotic attractors (SNAs) and chaotic attractors by using a nonlinear integrated circuit driven by a quasiperiodic input signal. An SNA is a geometrically strange attractor for which typical orbits have nonpositive Lyapunov exponents. It is a difficult problem to d ... [Chaos 23, 023110 (2013)] published Wed May 8, 2013. Eigenstates and instabilities of chains with embedded defects http://link.aip.org/link/?CHA/23/023109/1&agg=rss J. D'Ambroise, P. G. Kevrekidis, and S. Lepri<br/> We consider the eigenvalue problem for one-dimensional linear Schrodinger lattices (tight-binding) with an embedded few-sites linear or nonlinear, Hamiltonian or non-conservative defect (an oligomer). Such a problem arises when considering scattering states in the presence of (generally complex) imp ... [Chaos 23, 023109 (2013)] published Wed May 8, 2013. Effective suppressibility of chaos http://link.aip.org/link/?CHA/23/023107/1&agg=rss Alvaro G. Lopez, Jesus M. Seoane, and Miguel A. F. Sanjuan<br/> Suppression of chaos is a relevant phenomenon that can take place in nonlinear dynamical systems when a parameter is varied. Here, we investigate the possibilities of effectively suppressing the chaotic motion of a dynamical system by a specific time independent variation of a parameter of our syste ... [Chaos 23, 023107 (2013)] published Wed May 8, 2013. Robust global synchronization of two complex dynamical networks http://link.aip.org/link/?CHA/23/023108/1&agg=rss Mohammad Mostafa Asheghan and Joaquin Miguez<br/> We investigate the synchronization of two coupled complex dynamical networks, a problem that has been termed outer synchronization in the literature. Our approach relies on (a) a basic lemma on the eigendecomposition of matrices resulting from Kronecker products and (b) a suitable choice of Lyapunov ... [Chaos 23, 023108 (2013)] published Wed May 8, 2013. Child allowances, fertility, and chaotic dynamics http://link.aip.org/link/?CHA/23/023106/1&agg=rss Hung-Ju Chen and Ming-Chia Li<br/> This paper analyzes the dynamics in an overlapping generations model with the provision of child allowances. Fertility is an increasing function of child allowances and there exists a threshold effect of the marginal effect of child allowances on fertility. We show that if the effectiveness of child ... [Chaos 23, 023106 (2013)] published Wed Apr 24, 2013. Beyond long memory in heart rate variability: An approach based on fractionally integrated autoregressive moving average time series models with conditional heteroscedasticity http://link.aip.org/link/?CHA/23/023103/1&agg=rss Argentina Leite, Ana Paula Rocha, and Maria Eduarda Silva<br/> Heart Rate Variability (HRV) series exhibit long memory and time-varying conditional variance. This work considers the Fractionally Integrated AutoRegressive Moving Average (ARFIMA) models with Generalized AutoRegressive Conditional Heteroscedastic (GARCH) errors. ARFIMA-GARCH models may be used to ... [Chaos 23, 023103 (2013)] published Fri Apr 19, 2013. Characterization of multiscroll attractors using Lyapunov exponents and Lagrangian coherent structures http://link.aip.org/link/?CHA/23/023105/1&agg=rss Filipe I. Fazanaro, Diogo C. Soriano, Ricardo Suyama, Romis Attux, Marconi K. Madrid et al.<br/> The present work aims to apply a recently proposed method for estimating Lyapunov exponents to characterizewith the aid of the metric entropy and the fractal dimensionthe degree of information and the topological structure associated with multiscroll attractors. In particular, the employed methodolo ... [Chaos 23, 023105 (2013)] published Fri Apr 19, 2013. Bifurcations in a low-order nonlinear model of tropical Pacific sea surface temperatures derived from observational data http://link.aip.org/link/?CHA/23/023104/1&agg=rss Mei Hong, Ren Zhang, Hui-Zan Wang, Jing-jing Ge, and Ao-Da Pan<br/> Aiming at tackling the difficulty in exactly constituting the sea surface temperature (SST) dynamical model, the paper introduces the dynamical system reconstruction idea and establishes the nonlinear dynamical model of SST field based on 1963-2010 monthly average Hadley SST data. Time coefficients ... [Chaos 23, 023104 (2013)] published Fri Apr 19, 2013. Intermittency in relation with 1/f noise and stochastic differential equations http://link.aip.org/link/?CHA/23/023102/1&agg=rss J. Ruseckas and B. Kaulakys<br/> One of the models of intermittency is on-off intermittency, arising due to time-dependent forcing of a bifurcation parameter through a bifurcation point. For on-off intermittency, the power spectral density (PSD) of the time-dependent deviation from the invariant subspace in a low frequency region e ... [Chaos 23, 023102 (2013)] published Wed Apr 17, 2013. Dust-acoustic Gardner solitons and double layers in dusty plasmas with nonthermally distributed ions of two distinct temperatures http://link.aip.org/link/?CHA/23/013147/1&agg=rss I. Tasnim, M. M. Masud, M. Asaduzzaman, and A. A. Mamun<br/> A rigorous theoretical investigation has been performed on dust-acoustic (DA) solitary structures in an unmagnetized dusty plasma, consisting of negatively charged mobile dust grains, Boltzmann distributed electrons, and nonthermally distributed ions of two distinct temperatures. The Korteweg-de Vri ... [Chaos 23, 013147 (2013)] published Thu Mar 28, 2013. Spike phase synchronization in delayed-coupled neural networks: Uniform vs. non-uniform transmission delay http://link.aip.org/link/?CHA/23/013146/1&agg=rss Mahdi Jalili<br/> In this paper, we investigated phase synchronization in delayed dynamical networks. Non-identical spiking Hindmarsh-Rose neurons were considered as individual dynamical systems and coupled through a number of network structures such as scale-free, Erd&#x0151;sRenyi, and modular. The individual neuro ... [Chaos 23, 013146 (2013)] published Mon Mar 25, 2013. Integrated computation of finite-time Lyapunov exponent fields during direct numerical simulation of unsteady flows http://link.aip.org/link/?CHA/23/013145/1&agg=rss Justin Finn and Sourabh V. Apte<br/> The computation of Lagrangian coherent structures typically involves post-processing of experimentally or numerically obtained fluid velocity fields to obtain the largest finite-time Lyapunov exponent (FTLE) field. However, this procedure can be tedious for large-scale complex flows of general inter ... [Chaos 23, 013145 (2013)] published Thu Mar 21, 2013. Soliton dynamics in media with space stimulated Raman scattering and synchronic spatial variation of dispersion and self-phase modulation http://link.aip.org/link/?CHA/23/013143/1&agg=rss N. V. Aseeva, E. M. Gromov, and V. V. Tyutin<br/> Solitons dynamics in the frame of the extended nonlinear Schrodinger equation taking into account space stimulated Raman scattering (SSRS), synchronic spatial variation of inhomogeneous second-order dispersion (SOD), and self-phase modulation (SPM) is considered both analytically and numerically. Co ... [Chaos 23, 013143 (2013)] published Mon Mar 18, 2013. Robust detection of dynamic community structure in networks http://link.aip.org/link/?CHA/23/013142/1&agg=rss Danielle S. Bassett, Mason A. Porter, Nicholas F. Wymbs, Scott T. Grafton, Jean M. Carlson et al.<br/> We describe techniques for the robust detection of community structure in some classes of time-dependent networks. Specifically, we consider the use of statistical null models for facilitating the principled identification of structural modules in semi-decomposable systems. Null models play an impor ... [Chaos 23, 013142 (2013)] published Mon Mar 18, 2013. Referee acknowledgment for 2012 http://link.aip.org/link/?CHA/23/010201/1&agg=rss D. Campbell<br/> Abstract not available. [Chaos 23, 010201 (2013)] published Mon Mar 18, 2013.