Vasovagal Syncope. Vasovagal syncope is a common cause of fainting. The vagus nerve is overstimulated and causes the body's blood vessels to dilate and the heart to slow down. This anti-adrenaline effect decreases the ability of the heart to pump blood upward to the brain against gravity. Without blood flow, the brain turns off.
Enigma. The Enigma machine is a piece of spook hardware invented by a German and used by Britain's codebreakers as a way of deciphering German signals traffic during World War Two.hoto: A four-rotor German Enigma cipher machine made during WW2. This rare machine is thought to have been used in the post-war years for coding Swiss diplomatic traffic. (SSPL/Getty Images).
The Turing machine is an abstract machine introduced in 1936 by Alan Turing to give a mathematically precise definition of algorithm or 'mechanical procedure'.The concept is still widely used in theoretical computer science, especially in complexity theory and the theory of computation. Turing machine that is able to simulate any other Turing machine is called a universal Turing machine or simply a universal machine as Turing described it in 1947: It can be shown that a single special machine of that type can be made to do the work of all.