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Die Glocke (German: [diː ˈɡlɔkə], 'The Bell') was a purported top-secret scientific technological device, wonder weapon, or Wunderwaffe developed in the 1940s in Nazi Germany. Rumors of this device have persisted for decades after WW2 and were used as a plot trope in the fiction novel Lightning by Dean Koontz (1988).
Fragarach – Sword of the god of the seas Manannan mac Lir and later Lugh in Irish legend; it was said to be a weapon that no armour could stop. Caladbolg – Two-handed sword of Fergus mac Róich in Irish legend; said to make a circle like an arc of rainbow when swung, and to have the power to cleave the tops from the hills.
Sword of Surtr the flaming sword of the fire giant king Surtr which he uses to slay Freyr and cover the realms in fire at the end of Ragnarök, possibly the same as Freyr's sword. Tyrfing (also Tirfing or Tyrving ), the cursed sword of Svafrlami with a golden hilt that would never miss a stroke, would never rust and would cut through stone and ...
Crypto-1 is a cryptosystem developed by NXP for use on MIFARE chips. The system is proprietary and originally the algorithm has not been published. Upon reverse engineering of the chip, researchers from the University of Virginia and the Chaos Computer Club found an attack on Crypto-1 exploiting a poorly initialized random number generator. [13]
Phreaking began in the 1960s when it was discovered that certain whistles could replicate the 2600 Hz pitch used in phone signalling systems in the United States. [3] Phone phreaks experimented with dialing around the telephone network to understand how the phone system worked, engaging in activities such as listening to the pattern of tones to figure out how calls were routed, reading obscure ...
The most widely used form is the interrupter bell, which is a mechanical bell that produces a continuous sound when current is applied. See animation, above. The bell or gong (B), which is often in the shape of a cup or half-sphere, is struck by a spring-loaded arm (A) with a metal ball on the end called a clapper, actuated by an electromagnet ...
The permutations that avoid the generalized patterns 12-3, 32-1, 3-21, 1-32, 3-12, 21-3, and 23-1 are also counted by the Bell numbers. [4] The permutations in which every 321 pattern (without restriction on consecutive values) can be extended to a 3241 pattern are also counted by the Bell numbers. [ 5 ]
In mathematics, a generating function is a representation of an infinite sequence of numbers as the coefficients of a formal power series.Generating functions are often expressed in closed form (rather than as a series), by some expression involving operations on the formal series.