Phi Persei is also a variable star with rapid variations in its brightness and spectrum.

RF currents pass through the antenna creating a rapid variation of the electric field, ionizing the gas.

It is generally reserved for patients where rapid variations in arterial pressure are anticipated.

It's not subject to rapid variations of the outside atmosphere.

It was unusual in the rapid variations seen in the structure of its tail.

Up to 300MW in a single location with correspondingly large and rapid variations in output.

This is usually used where rapid variations of blood pressure are anticipated.

But ice samples from Vostok in Antarctica showed no such rapid variations, they found.

It is this rapid variation in phase that creates the asymmetric line-shape.

However, an irregular shape was suggested as an alternative cause of the rapid variation.