Braess Paradox in AC Power Networks

Adding an extra road in a road network can increase traffic congestion. This counter-intuitive outcome is called a Braess Paradox.  Braess Paradoxes, where increased connectivity degrades the performance of a network,…

On the speed of ships

The graph shows annual median speed of ships from 1750 to 2014. It is based on historical location data from 617,754 vessels in the ICOADS dataset. Ship speeds increased by 0.2kn/decade up…