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Burkina Faso. VOL (1972–1984) as Upper Volta; also BKF [1] [31] CAF. Central African Republic. AFC (1968) [32] CAM. Cambodia.
The United States has been assigned all call signs with the prefixes K, N, and W, as well as AAA–ALZ. Allocating call signs within these groups is the responsibility of the National Telecommunications and Information Administration (almost all government stations) or the Federal Communications Commission (all other stations), and they subdivide the radio call signs into the following groups:
Juneteenth is a federal holiday in the United States. For decades, activists and congress members (led by many African Americans) proposed legislation, advocated for, and built support for state and national observances. During his campaign for president in June 2020, Joe Biden publicly celebrated the holiday. [125]
The Da Vinci Code is a 2006 mystery thriller film directed by Ron Howard, written by Akiva Goldsman, and based on Dan Brown 's 2003 novel of the same name. The first in the Robert Langdon film series, the film stars Tom Hanks, Audrey Tautou, Ian McKellen, Alfred Molina, Jürgen Prochnow, Jean Reno and Paul Bettany.
Rolling code. A rolling code (or sometimes called a hopping code) is used in keyless entry systems to prevent a simple form of replay attack, where an eavesdropper records the transmission and replays it at a later time to cause the receiver to 'unlock'. Such systems are typical in garage door openers and keyless car entry systems.
President John F. Kennedy, codename "Lancer" with First Lady Jacqueline Kennedy, codename "Lace". The United States Secret Service uses code names for U.S. presidents, first ladies, and other prominent persons and locations. [1] The use of such names was originally for security purposes and dates to a time when sensitive electronic ...
In mathematical terms, Hamming codes are a class of binary linear code. For each integer r ≥ 2 there is a code-word with block length n = 2r − 1 and message length k = 2r − r − 1. Hence the rate of Hamming codes is R = k / n = 1 − r / (2r − 1), which is the highest possible for codes with minimum distance of three (i.e., the minimal ...
Linear code. In coding theory, a linear code is an error-correcting code for which any linear combination of codewords is also a codeword. Linear codes are traditionally partitioned into block codes and convolutional codes, although turbo codes can be seen as a hybrid of these two types. [1] Linear codes allow for more efficient encoding and ...