A central goal of postgenomic biology is the elucidation of the regulatory relationships among all cellular constituents that together comprise the ‘genetic network’ of a cell or microorganism. Experimental manipulation of gene activity coupled with the assessment of perturbed transcriptome...

Collective motion is abundant in nature, producing a vast amount of phenomena which have been studied in recent years, including the landing of flocks of birds. We investigate the collective decision making scenario where a flock of birds decides the optimal time of landing in the absence of a...

In this paper the roughening of interfaces moving in inhomogeneous media is investigated by examining the corresponding stochastic differential equations using (i) numerical methods and (ii) dimensional analysis. We consider interface evolution equations where disorder is represented by quenched...

The basic mechanisms producing rough surfaces during geomorphological evolution are studied by carrying out model experiments and analyzing the results in terms of fractal scaling. We have been able to find an experimental evidence for kinetic roughening in our micromodel of mountain ranges. We...

Recently developed concepts and techniques of analyzing complex systems provide new insight into the structure of social networks. Uncovering recurrent preferences and organizational principles in such networks is a key issue to characterize them. We investigate school friendship networks from...

We model the collective clapping of spectators by globally coupled two-mode stochastic oscillators. All distinct experimentally observable clapping modes are successfully reproduced. Surprisingly, it is found that in an extended region of the parameter space the periodicity of the collective...