Important issues in stable, strongly-stratified flows, often occurring in the atmosphere and oceans, are when and how `classical' 3D turbulence appears, and the properties of the resulting turbulence. In the oceans, at horizontal scales above a few meters, for example, buoyancy often exerts a dominant...

Cellular processes are typically controlled by gene regulatory circuits that are comprised of interactions among genes and proteins. However, the functional importance of a particular pattern of interactions (architecture) that constitutes a genetic circuit is typically poorly understood. Our model...