The main symptoms of vascular dementia include: 1  Abrupt onset (in some, but not all patients). 2  Progressive deterioration of intellectual abilities, processing speed, cognitive and motor abilities. 3  Progressive memory loss. 4  Slow, unsteady gait. 5  Fluctuating course (in some patients).
Although radio frequency is a rate of oscillation, the term radio frequency or its abbreviation RF are used as a synonym for radio â i.e., to describe the use of wireless communication, as opposed to communication via electric wires. The energy in an RF current can radiate off a conductor into space as electromagnetic waves (radio waves); this is the basis of radio technology. 2  RF current does not penetrate deeply into electrical conductors but tends to flow along their surfaces; this is known as the skin effect.
power noun (ENERGY) âº [ U ] specialized physics the rate at which energy is used, or the ability to produce energy: The ship was only slightly damaged in the collision and was able to sail into port under its own power. The power rating of my amplifier is 40 watts per channel.