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.
Radiofrequency Radiation (RF) Radiofrequency (or RF) Radiation refers to electromagnetic fields with frequencies between 300 kHz and 300 MHz, while Microwave (or MW) Radiation covers fields from 300 MHz to 300 GHz. Since they have similar characteristics, RF and MW radiation are usually treated together.