What is Black Box?
| Unknown and Often Unknowable Mechanism, Process, or System |
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Avionics: The term "Black Box" actually refers to two "black boxes" - the flight data and cockpit voice recorders. These instruments record a wide variety of information, such as speed and altitude or the voice communication within the cockpit. The black boxes are also equipped with beacons that aid rescuers in locating them. Quantum Information: A computational operation whose implementation is unknown. Typically, a BlackBox implements one of a restricted set of operations, and the goal is to determine which of these operations it implements by using it with different inputs. Each use of the BlackBox is called a "query". The smallest number of queries required to determine the operation is called the "query complexity" of the restricted set. Determining the query complexity of sets of operations is an important problem area of computational complexity. Telephone: A BlackBox is a resistor (and often capacitor in parallel) placed in series across your phone line to cause the phone company equipment to be unable to detect that you have answered your telephone. People who call you will then not be billed for the telephone call. Black Boxes do not work under ESS. |
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