Early tree gliders

Special forms of flight. I: Balloons, gliders, and hang gliders.

Two hundred years ago the Montgolfier brothers first demonstrated to the world that man-carrying "engines for flying" were possible. Their vehicle, however, did not have "artificiall Wings" but was a balloon filled with hot air. (A Brazilian, Bartolomeu de Gusmao, had flown a small unmanned hot air balloon 74 years earlier.') After successful unmanned demonstrations the first recorded free flig...

Gliders in Rule 110

The existence of several periodic structures (known as gliders) in the evolution space of the one-dimensional cellular automaton Rule 110, has important lines of investigation in cellular automata theory such as: complex behavior, universal computation and self-reproduction. We investigate the types of gliders, their properties and production through collisions in Rule 110 and their representat...

Routing strategies for underwater gliders

rapidly reach a specified waypoint or to maximize the ability to map a measured field, both in the presence of significant currents. For rapid transit in a frozen velocity field, direct minimization of travel time provides a trajectory ‘‘ray’’ equation. A simpler routing algorithm that requires less information is also discussed. Two approaches are developed to maximize the mapping ability, as ...

Slocum Gliders: Robust and ready

Logical Gates via Gliders Collisions

An elementary cellular automaton with memory is a chain of finite state machines (cells) updating their state simultaneously and by the same rule. Each cell updates its current state depending on current states of its immediate neighbours and a certain number of its own past states. Some cellstate transition rules support gliders, compact patterns of non-quiescent states translating along the c...