The number of distinct functional classes of single-stranded RNAs (ssRNAs) and the number of sequences representing them are substantial and continue to increase. Organizing this data in an evolutionary context is essential, yet traditional comparative sequence analyses require that homologous...

The paper: (1) Gives a general argument why research on nonlinear science in general and chaos in particular is important in economics and finance. (2) Puts forth two definitions of stochastic nonlinearity (IID-Linearity and MDS-Linearity) for nonlinear time series analysis and argues for their...

We discuss the repton model of agarose gel electrophoresis of DNA. We review previous results, both analytic and numerical, present a new numerical algorithm for the efficient simulation of the model, and suggest a new approach to the model's analytic solutions.

A class of autocatalytic reaction networks based on template dependent ligation and higher order catalysis is analyzed. Apart from an irreversible ligation reaction we consider only reversible aggregation steps that provide a realistic description of molecular recognition. The over-all dynamics...

We introduce a new class of models in which a large number of "agents" organize under the influence of an externally imposed coherent noise. The model shows reorganization events whose size distribution closely follows a power-law over many decades, even in the case where the agents do not...

We propose a method for modelling economic systems in which outcomes depend locally on the predictions that agents make of other agents. We develop populations games in which each agent adaptively searches for a good model of its environment. We demonstrate that such systems can exhibit...

Some authors have hypothesized that the observed self-synchronized activity in ant colonies provides some adaptive advantages, and, in particular, it has been suggested that task realization may benefit from this ordered temporal pattern of behavior (Robinson, 1992; Hatcher et al., 1992). In this...

Thermodynamic depth is an appealing but flawed complexity measure. It depends on a set of macroscopic states for a system, but neither its original introduction by Lloyd and Pagels nor any follow-up work has considered how to select these states. Depth, therefore, is at root subjective....

Economic choices involving pollution, like those concerning common resources, relate to the emergence of cooperation among actors. Since pollution propagates in space, the temporal dynamics of economic choices is coupled to the spatial dynamics of pollution. We start from a simple description of...

In an influential paper, Grafen (1990) provided a mathematical demonstration of the validity of Zahavi's handicap principle . Grafen showed how an honest signalling system is stabilized through costly signalling: cost stabilizes the system when the cost of lying is greater than any benefit...