To avoid some of the design challenges involved in creating micro-scale air vehicles that mimic the flapping of winged insects or birds, researchers propose using flexible wings that are driven by a ...

Regular OSCILLATION, for instance, by a particle in a solid, fluid or gas, displaced from its normal position or random motion, when the force required is proportional to the displacement. This motion ...

A PHASE relation familiar to students of applied mathematics exists between a simple harmonic oscillation and its derivative. Similar relations exist between exponential functions and their ...