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The United Nations uses a combination of ISO 3166-1 alpha-2 and alpha-3 codes, along with codes that pre-date the creation of ISO 3166, for international vehicle registration codes, which are codes used to identify the issuing country of a vehicle registration plate; some of these codes are currently indeterminately reserved in ISO 3166-1.
The following notable deaths occurred in 2024. Names are reported under the date of death, in alphabetical order. A typical entry reports information in the following sequence:
The military intelligence gathered by these systems was essential to the Allied war effort. By the end of the war 10 Mark II COLOSSI were in use at Bletchley Park; they superseded the Heath Robinson. Each COLOSSI used 1,600 vacuum tubes (Mark I) or 2,400 vacuum tubes (Mark II). [1] The wartime codebreaking at BP was kept secret until the 1970s. [1]
The partial sums of the series 1 + 2 + 3 + 4 + 5 + 6 + ⋯ are 1, 3, 6, 10, 15, etc.The nth partial sum is given by a simple formula: = = (+). This equation was known ...
William Ray Norwood Jr. (born January 17, 1981), [1] known professionally as Ray J, is an American R&B singer, songwriter, television presenter, and actor. Born in McComb, Mississippi and raised in Carson, California, he is the younger brother of singer and actress Brandy.
While the acronyms are similar, reactive airway disease (RAD) and reactive airways dysfunction syndrome (RADS) are not the same. [1]Reactive airways dysfunction syndrome was first identified by Stuart M. Brooks and colleagues in 1985 as an asthma-like syndrome developing after a single exposure to high levels of an irritating vapor, fume, or smoke.
Differences in the political and economic systems of Western democracies and the Soviet Union—dictatorship by one party versus pluralistic competition among parties, mass arrests and execution of dissidents versus free press and independent courts, state ownership of all farms and businesses versus capitalism, became simplified and refined in ideologies to represent two ways of life.
Commercial vacuum tubes are evacuated at manufacture to about 0.000001 mmHg (1.0 × 10 −6 Torr; 130 μPa; 1.3 × 10 −6 mbar; 1.3 × 10 −9 atm). [77] [78] To prevent gases from compromising the tube's vacuum, modern tubes are constructed with getters, which are usually metals that oxidize quickly, barium being the most common.