Cortical dynamics revisited.

Cortical Songs Revisited: A Lesson in Statistics

Recordings from single neurons in the cortex have revealed precisely repeating patterns of synaptic events. These repeats are known as cortical "motifs" and have been suggested to reflect the precise replay of spatiotemporal firing sequences ("synfire" chains). In this issue of Neuron, Mokeichev et al. use compelling statistical analysis to show that, rather than being evidence of deterministic...

Integrator or coincidence detector? The role of the cortical neuron revisited.

Neurons can operate in two distinct ways, depending on the duration of the interval over which they effectively summate incoming synaptic potentials. If this interval is of the order of the mean interspike interval or longer, neurons act effectively as temporal integrators and transmit temporal patterns with only low reliability. If, by contrast, the integration interval is short compared to th...

Phenomenological approach to the critical dynamics of the QCD phase transition revisited

The phenomenological dynamics of the QCD critical phenomena is revisited. Recently, Son and Stephanov claimed that the dynamical universality class of the QCD phase transition belongs to model H. In their discussion, they employed a time-dependent Ginzburg-Landau equation for the net baryon number density, which is a conserved quantity. We derive the Langevin equation for the net baryon number ...

A vision on the future of urban dynamics: Forrester revisited

QUICKSELECT Revisited

We give an overview of the running time analysis of the random divide-and-conquer algorithm FIND or QUICKSELECT. The results concern moments, distribution of FIND’s running time, the limiting distribution, a stochastic bound and the key: a stochastic fixed point equation.