These vehicles were powered by an alternating current of 15kV and used a variable frequency.

Most instruments are characterized on a variable frequency shaking table.

Ductal carcinoma in situ (DCIS) is a noninvasive condition that can progress to invasive cancer, with variable frequency and time course.

Using high-performance emitters of variable frequencies, scientists investigated the propagation of radio waves and their reflections based on the layers of the ionosphere.

It first applies "an AC voltage with a variable frequency to at least one electric conductor," Mr. Marksteiner writes.

Currently, the buses run on 14 different routes between 6 AM and 9 PM with variable frequency between 15 minutes to 30 minutes.

The variable frequency of the 'make and break' action of the mechanism created a type of tremolo effect.

Finally, combined parasitic effects such as inherent inductance, resistance, or dielectric losses can exhibit non-uniform behavior at variable frequencies of operation.

Three types are available: variable frequency rotating disc choppers, fixed frequency tuning fork choppers, and optical shutters.

This also offers the advantage of variable frequency.