247 citations · 247 across the 2 of their papers we have counts for
5 papers
Effect of nonlinear filters on detrended fluctuation analysis
Z. Chen, K. Hu, P. Carpena +3
We investigate how various linear and nonlinear transformations affect the scaling properties of a signal, using the detrended fluctuation analysis (DFA). Specifically, we study th…
Quantification of Sleep Fragmentation Through the Analysis of Sleep-Stage Transitions
Chung-Chuan Lo, Plamen Ch. Ivanov, Lus A. Nunes Amaral +3
We introduce new quantitative approaches to study sleep-stage transitions with the goal of addressing the two following questions: (i) Can the new approaches provide more informati…
Relation between Magnitude Series Correlations and Multifractal Spectrum Width
Yosef Ashkenazy, Shlomo Havlin, Plamen Ch. Ivanov +3
We study the correlation properties of long-range correlated time series, , with tunable correlation exponent and built-in multifractal properties. For the cases we investigat…
Decomposition of Heartbeat Time Series: Scaling Analysis of the Sign Sequence
Y. Ashkenazy, P. Ch. Ivanov, S. Havlin +4
The cardiac interbeat (RR) increment time series can be decomposed into two sub-sequences: a magnitude series and a sign series. We show that the sign sequence, a simple binary rep…
Quantitative Characterization of Permeability Fluctuations in Sandstone
Hernán A. Makse, Glenn W. Davies, Shlomo Havlin +3
Sedimentary rocks have complicated permeability fluctuations arising from the geological processes that formed them. These permeability fluctuations significantly affect the flow o…