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Bailey–Borwein–Plouffe formula. The Bailey–Borwein–Plouffe formula (BBP formula) is a formula for π. It was discovered in 1995 by Simon Plouffe and is named after the authors of the article in which it was published, David H. Bailey, Peter Borwein, and Plouffe. [1] Before that, it had been published by Plouffe on his own site. [2]
A spinneret is a silk -spinning organ of a spider or the larva of an insect. Some adult insects also have spinnerets, such as those borne on the forelegs of Embioptera. [1] Spinnerets are usually on the underside of a spider's opisthosoma, and are typically segmented. [2][3] While most spiders have six spinnerets, some have two, four, or eight. [4]
In thermodynamics, a reversible process is a process, involving a system and its surroundings, whose direction can be reversed by infinitesimal changes in some properties of the surroundings, such as pressure or temperature.
Spigot algorithm. A spigot algorithm is an algorithm for computing the value of a transcendental number (such as π or e) that generates the digits of the number sequentially from left to right providing increasing precision as the algorithm proceeds. Spigot algorithms also aim to minimize the amount of intermediate storage required.
Note the exposed spigot on the lower left launcher. Spigot mortars generally fell out of favour after World War II and were replaced by smaller conventional mortars. Military applications of spigot mortars include: The 230 mm (9.1 in) petard mortar used on the Churchill AVRE by Britain in World War II. [20]
The Blacker Bombard, also known as the 29-mm Spigot Mortar, [1] was an infantry anti-tank weapon devised by Lieutenant-Colonel Stewart Blacker in the early years of the Second World War. Intended as a means to equip Home Guard units with an anti-tank weapon in case of German invasion, at a time of grave shortage of weapons, it was accepted only ...
The vehicle carried 500 rounds for the main gun and 2000 rounds for the machine guns. It was also armed with a pintle-mounted 9P135M-1 ATGM launcher capable of firing a SACLOS guided 9M113 "Konkurs" (AT-5 Spandrel) and a 9M113M "Konkurs-M" (AT-5B Spandrel B) as well as a 9M111 "Fagot" (AT-4 Spigot) ATGM and a 9M111-2 "Fagot" (AT-4B Spigot B) ATGM.
The earliest spigot and socket cast iron pipes were jointed by filling the socket with a mixture of water, sand, iron filings and sal-ammoniac (ammonium chloride.) A gasket ring was pushed into the socket round the spigot to contain the mixture which was pounded into the socket with a caulking tool and then pointed off. This took several weeks ...