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- Tel Aviv UniversityIL181 papers
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5 papers · 2 filters
Characterization of Sleep Stages by Correlations of Heartbeat Increments
Jan W. Kantelhardt, Yosef Ashkenazy, Plamen Ch. Ivanov +5
We study correlation properties of the magnitude and the sign of the increments in the time intervals between successive heartbeats during light sleep, deep sleep, and REM sleep us…
On time's arrow in Ehrenfest models with reversible deterministic dynamics
R. Metzler, W. Kinzel, I. Kanter
We introduce a deterministic, time-reversible version of the Ehrenfest urn model. The distribution of first-passage times from equilibrium to non-equilibrium states and vice versa…
Magnitude and Sign Correlations in Heartbeat Fluctuations
Yosef Ashkenazy, Plamen Ch. Ivanov, Shlomo Havlin +3
We propose an approach for analyzing signals with long-range correlations by decomposing the signal increment series into magnitude and sign series and analyzing their scaling prop…
Flow Between Two Sites on a Percolation Cluster
José S. Andrade, Sergey V. Buldyrev, Nikolay V. Dokholyan +5
We study the flow of fluid in porous media in dimensions and 3. The medium is modeled by bond percolation on a lattice of sites, while the flow front is modeled by trac…
Multifractal Properties of the Random Resistor Network
M. Barthelemy, S. V. Buldyrev, S. Havlin +1
We study the multifractal spectrum of the current in the two-dimensional random resistor network at the percolation threshold. We consider two ways of applying the voltage differen…