The expression dBm is used to define signal strength in wires and cables at RF and AF frequencies. The symbol is an abbreviation for decibels relative to one milliwatt, where one milliwatt (1 mW) equals 1/1000 of a watt (0.001 W or 10 -3 W). This unit is commonly used in test laboratories. The dBm increment is based on the decibel , a logarithm ic measure of relative power . Suppose a signal has a power level of P mW. Then the signal strength in dBm, symbolized S dBm , is: S dBm = 10 log 10 P. A 1-mW signal has a level of 0 dBm.
These 10 animal facts will amaze you. Decortication is a term which is used to refer to the removal of a rind or peel. In a medical context, the term means removing the fibrous outer layer of tissue which covers an organ. Most typically, decortication is used in the management of certain lung conditions, most notably in tuberculosis and mesothelioma.
From Wikipedia, the free encyclopedia. Dermatographic urticaria (also known as dermographism, dermatographism or  skin writing ) is a skin disorder and one of the most common types of urticaria, in which the skin becomes raised and inflamed when stroked, scratched, rubbed, and sometimes even slapped.Contents.he underlying cause of dermographism is not known, and can last for many years without relief. Five percent of chronic cases are never solved. Increased incidence has been observed following prolonged exposure to microwaves. The condition may subside and be effectively cured; however, it is often a lifelong ailment.