Communism was seen as a rival of and a threat to western capitalism for most of the 20th century. This rivalry peaked during the Cold War, as the world's two remaining superpowers, the United States and the Soviet Union, polarized most of the world into two camps of nations.
Renal Replacement Therapy (RRT) Overview. Overview of RRT. Renal replacement therapy (RRT) is required when the kidneys are functioning at less than 10â15 percent. Dialysis. People with advanced chronic renal failure (CRF), kidney failure, who have progressed to end-stage renal disease (ESRD) usually require dialysis.
cathode ray tube (CRT) A cathode ray tube (CRT) is a specialized vacuumtube in which images are produced when an electron beam strikes aphosphorescent surface. Most desktop computer displays make useof CRTs. The CRT in a computer display is similar to thepicture tube in a television receiver. A cathode ray tube consists of several basiccomponents, as illustrated below. The electron gun generates anarrow beam of electrons.