The International Standard Book Number (ISBN) is a numeric commercial book identifier that is intended to be unique. Publishers purchase or receive ISBNs from an affiliate of the International ISBN Agency.
A pseudorandom sequence of numbers is one that appears to be statistically random, despite having been produced by a completely deterministic and repeatable process. Pseudorandom number generators are often used in computer programming, as traditional sources of randomness available to humans rely on physical processes not readily available to computer programs, although developments in hardware random number generator technology have challenged this.
The number π is a mathematical constant that is the ratio of a circle's circumference to its diameter, approximately equal to 3.14159. The number π appears in many formulae across mathematics and physics. It is an irrational number, meaning that it cannot be expressed exactly as a ratio of two integers, although fractions such as are commonly used to approximate it. Consequently, its decimal representation never ends, nor enters a permanently repeating pattern. It is a transcendental number, meaning that it cannot be a solution of an equation involving only finite sums, products, powers, and integers. The transcendence of π implies that it is impossible to solve the ancient challenge of squaring the circle with a compass and straightedge. The decimal digits of π appear to be randomly distributed, but no proof of this conjecture has been found.
Benford's law, also known as the Newcomb–Benford law, the law of anomalous numbers, or the first-digit law, is an observation that in many real-life sets of numerical data, the leading digit is likely to be small. In sets that obey the law, the number 1 appears as the leading significant digit about 30% of the time, while 9 appears as the leading significant digit less than 5% of the time. Uniformly distributed digits would each occur about 11.1% of the time. Benford's law also makes predictions about the distribution of second digits, third digits, digit combinations, and so on.
The infinite monkey theorem states that a monkey hitting keys at random on a typewriter keyboard for an infinite amount of time will almost surely type any given text, including the complete works of William Shakespeare. In fact, the monkey would almost surely type every possible finite text an infinite number of times. The theorem can be generalized to state that any sequence of events that has a non-zero probability of happening will almost certainly occur an infinite number of times, given an infinite amount of time or a universe that is infinite in size.
A pseudorandom number generator (PRNG), also known as a deterministic random bit generator (DRBG), is an algorithm for generating a sequence of numbers whose properties approximate the properties of sequences of random numbers. The PRNG-generated sequence is not truly random, because it is completely determined by an initial value, called the PRNG's seed. Although sequences that are closer to truly random can be generated using hardware random number generators, pseudorandom number generators are important in practice for their speed in number generation and their reproducibility.
Western Publishing, also known as Western Printing and Lithographing Company, was a Racine, Wisconsin, best known for publishing the Little Golden Books. Its Golden Books Family Entertainment division also produced children's books and family-related entertainment products. The company had editorial offices in New York City and Los Angeles, California. Western Publishing became Golden Books Family Entertainment in 1996. Little Golden Books remains as an imprint of Penguin Random House. Golden Guides and Golden Field Guides are published by St. Martin's Press.
In computing, a hardware random number generator (HRNG), true random number generator (TRNG), non-deterministic random bit generator (NRBG), or physical random number generator is a device that generates random numbers from a physical process capable of producing entropy, unlike the pseudorandom number generator that utilizes a deterministic algorithm and non-physical nondeterministic random bit generators that do not include hardware dedicated to generation of entropy.
A SIMcard is an integrated circuit (IC) intended to securely store an international mobile subscriber identity (IMSI) number and its related key, which are used to identify and authenticate subscribers on mobile telephone devices. SIMs are also able to store address book contacts information, and may be protected using a PIN code to prevent unauthorized use.
Rand McNally is an American technology and publishing company that provides mapping, software and hardware for consumer electronics, commercial transportation and education markets. The company is headquartered in Chicago, Illinois, with a distribution center in Richmond, Kentucky.
Sir Maurice George Kendall, FBA was a prominent British statistician. The Kendall tau rank correlation is named after him.
Jackson Mac Low was an American poet, performance artist, composer and playwright, known to most readers of poetry as a practitioner of systematic chance operations and other non-intentional compositional methods in his work, which Mac Low first experienced in the musical work of John Cage, Earle Brown, and Christian Wolff. He was married to the artist Iris Lezak from 1962 to 1978, and to the poet Anne Tardos from 1990 until his death.
The RAND Health Insurance Experiment was an experimental study from 1974 to 1982 of health care costs, utilization and outcomes in the United States, which assigned people randomly to different kinds of plans and followed their behavior. Because it was a randomized controlled trial, it provided stronger evidence than the more common observational studies and concluded that cost sharing reduced "inappropriate or unnecessary" medical care (overutilization) but also reduced "appropriate or needed" medical care.
A Million Random Digits with 100,000 Normal Deviates is a random number book by the RAND Corporation, originally published in 1955. The book, consisting primarily of a random number table, was an important 20th century work in the field of statistics and random numbers.
Random number tables have been used in statistics for tasks such as selected random samples. This was much more effective than manually selecting the random samples. Nowadays, tables of random numbers have been replaced by computational random number generators.
Atlas Shrugged is a 1957 novel by Ayn Rand. It is her longest novel, the fourth and final one published during her lifetime, and the one she considered her magnum opus in the realm of fiction writing. She described the theme of Atlas Shrugged as "the role of man's mind in existence" and it includes elements of science fiction, mystery and romance. The book explores a number of philosophical themes from which Rand would subsequently develop Objectivism, including reason, property rights, individualism, libertarianism and capitalism, and depicts what Rand saw as the failures of governmental coercion. Of Rand's works of fiction, it contains her most extensive statement of her philosophical system.
In common usage, randomness is the apparent or actual lack of definite pattern or predictability in information. A random sequence of events, symbols or steps often has no order and does not follow an intelligible pattern or combination. Individual random events are, by definition, unpredictable, but if there is a known probability distribution, the frequency of different outcomes over repeated events is predictable. For example, when throwing two dice, the outcome of any particular roll is unpredictable, but a sum of 7 will tend to occur twice as often as 4. In this view, randomness is not haphazardness; it is a measure of uncertainty of an outcome. Randomness applies to concepts of chance, probability, and information entropy.
In the United States, a Social Security number (SSN) is a nine-digit number issued to U.S. citizens, permanent residents, and temporary (working) residents under section 205(c)(2) of the Social Security Act, codified as 42 U.S.C. § 405(c)(2). The number is issued to an individual by the Social Security Administration, an independent agency of the United States government. Although the original purpose for the number was for the Social Security Administration to track individuals, the Social Security number has become a de facto national identification number for taxation and other purposes.
The RAND Corporation is an American nonprofit global policy think tank, research institute, and public sector consulting firm. RAND Corporation engages in research and development (R&D) in a number of fields and industries. Since the 1950s, RAND research has helped inform United States policy decisions on a wide variety of issues, including the space race, the Vietnam War, the U.S.-Soviet nuclear arms confrontation, the creation of the Great Society social welfare programs, and national health care.
Bernard Babington Smith, OBE was a British academic, wartime intelligence officer and amateur athlete.
