Articles written in Pramana – Journal of Physics
Volume 38 Issue 3 March 1992 pp 219-231
Asymptotic behaviour of the moments of the first passage time (FPT) on a one-dimensional lattice holding a multifurcating hierarchy of teeth is studied. There is a transition from ordinary to anomalous diffusion when the parameter controlling the relative sizes of the teeth, is varied with respect to the furcating number of the hierarchy. The scaling behaviour of the moments of FPT with the linear dimensions of the lattice segment indicates that in the anomalcus phase the probability density of the FPT is multifractal.
Volume 48 Issue 1 January 1997 pp 69-85 Mathematical Aspects Of Dynamical Systems
We investigate the nature of the numerically computed power spectral density
Volume 48 Issue 4 April 1997 pp 871-882
We report new results on a dynamical model of serrated yielding. These essentially pertain to the full spectrum of Lyapunov exponents of the non-linear (chaotic) model and fractal characterization of the associated strange attractor. The power spectrum of scalar time series extracted from the phase space trajectories decays exponentially with increase of frequency and the decay constant is found proportional to the Kolmogorov-Sinai entropy.
Volume 94, 2020
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