Energetics of stochastic resonance

Peter Jung and Fabio Marchesoni

The authors discuss the motion of a Brownian particle in a double-well potential driven by a periodic force in terms of energies delivered by the periodic and the noise forces and energy dissipated into the viscous environment. The authors show that, while the power delivered by the periodic force to the Brownian particle is controlled by the strength of the noise, the power delivered by the noise itself is independent of the amplitude and frequency of the periodic force.

Chaos 21, 047516 (2011)

Sensory coding in oscillatory electroreceptors of paddlefish

Alexander B. Neiman and David F. Russell2

The authors characterized the linear and nonlinear response properties of Lorenzinian ampullary electroreceptors (ERs) of live paddlefish, and their encoding of various kinds of time-varying stimuli, ranging from artificial broad-band Gaussian noise to natural waveforms recorded from zooplankton prey.

Chaos 21, 047505 (2011) | Read the press release.

Effects of thermal gradients on the intensity of vortices generated in a cylindrical annulus

M. C. Navarro and H. Herrero

The authors have studied the influence of temperature gradients on the intensity of dust-devil-like vertical vortices in a cylindrical annulus. Increasing the temperature gradients intensifies the strength of the vortical structures developed while decreasing the gradients leads to weaker vortices or, in some cases, can even make them disappear.

Chaos 21, 043132 (2011)

Applying snapback repellers in resource budget models

Shu-Ming Chang and Hsun-Hui Chen

This work presents mathematical viewpoints and numerical analysis on Satake’s generalized resource budget model to rigorously prove that the generalized resource budget model is chaotic in Devaney’s sense by using the snapback repeller theory and the topological entropy theory.

 

Chaos 21, 043126 (2011)