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11 papers · 2 filters
Ferromagnetic transition in a double-exchange model
Eugene Kogan, Mark Auslender, Eran Dgani
We calculate the temperature of a ferromagnetic transition in a double-exchange model with classical core spins for arbitrary relation between Hund exchange coupling and electron b…
Long term persistence in the sea surface temperature fluctuations
Roberto A. Monetti, Shlomo Havlin, Armin Bunde
We study the temporal correlations in the sea surface temperature (SST) fluctuations around the seasonal mean values in the Atlantic and Pacific oceans. We apply a method that syst…
Volatility in atmospheric temperature variability
R. B. Govindan, A. Bunde, S. Havlin
Using detrended fluctuation analysis (DFA), we study the scaling properties of the volatility time series of daily temperatures for ten chosen sites arou…
Nonlinear Volatility of River Flux Fluctuations
Valerie N. Livina, Yosef Ashkenazy, Peter Braun +3
We study the spectral properties of the magnitudes of river flux increments, the volatility. The volatility series exhibits (i) strong seasonal periodicity and (ii) strongly power-…
Parallel versus sequential updating for Belief Propagation decoding
H. Kfir, I. Kanter
sequential updating scheme (SUS) for the belief propagation algorithm is proposed, and is compared with the parallel (regular) updating scheme (PUS). Simulation results on various…
Global climate models violate scaling of the observed atmospheric variability
R. B. Govindan, Dmitry Vyushin, Armin Bunde +3
We test the scaling performance of seven leading global climate models by using detrended fluctuation analysis. We analyse temperature records of six representative sites around th…