A network topology that uses two rings, with transmission in opposite directions in each ring. Designed for fault tolerance and increased speed, if one of the rings breaks, traffic can be rerouted ...

This engine combusts its fuel and oxidizer in a rotating ring-shaped channel, and the resulting shockwaves create a sustained combustion reaction that makes the engine more efficient than ...

The user can control the device clicking a small button or -- for devices with gradient controls, such as a speaker's volume -- rotating the ring. While smart devices in homes have grown to ...