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24 papers · 1 filter
Collective motion occurs inevitably in a class of populations of globally coupled chaotic elements
N. Nakagawa, T. S. Komatsu
We discovered numerically a scaling law obeyed by the amplitude of collective mo tion in large populations of chaotic elements. Our analysis strongly suggests that such populations…
Stochastic resonance in a model neuron with reset
Hans E. Plesser, Shigeru Tanaka
The response of a noisy integrate-and-fire neuron with reset to periodic input is investigated. We numerically obtain the first-passage-time density of the pertaining Ornstein-Uhle…
A Fast Algorithm for High-Dimensional Markov Processes with Finite Sets of Transition Rates
Hans E. Plesser, Dietmar Wendt
The discrete class algorithm presented in this paper is an efficient simulation tool for stochastic processes governed by a reasonably small set of transition rates. The algorithm…
ASCA and ROSAT X-ray Spectra of High-Redshift Radio-Loud Quasars
M. Cappi, M. Matsuoka, A. Comastri +4
Results are presented on the X-ray properties of 9 high-redshift (1.2 < z < 3.4) radio-loud quasars (RLQs) observed by ASCA (10 observations) and ROSAT (11 observations, for a subs…
Neutron Capture and Neutron Halos
A. Mengoni, T. Otsuka, T. Nakamura +1
The connection between the neutron halo observed in light neutron rich nuclei and the neutron radiative capture process is outlined. We show how nuclear structure information such…
Spectral Variability and iron line emission in the ASCA Observations of the Seyfert 1 Galaxy NGC4051
Matteo Guainazzi, Tatehiro Mihara, Chiko Otani +1
We present the results of an extensive analysis of the ``ASCA'' AO2 observation of the Seyfert 1 galaxy NGC4051. The target exhibits broadband [0.5--10 keV] variability by a factor…