Pinwheel Nebula

	Pinwheel Nebula Pinwheel may refer to: * Pinwheel (toy), a spinning children's toy * Pinwheel (cryptography), a device for producing a short pseudo-random sequence of bits * Pinwheel (shogi), an opening in the game shogi or Japanese chess * Pinwheel (TV channel), a channel which would later turn into Nickelodeon * ''Pinwheel'' (TV series), a children's show on Nickelodeon that ran from 1977 to 1984 * Pinwheel calculator (part of), a type of early mechanical arithmetic machine * Pinwheel escapement, part of a mechanical clock * ''Tabernaemontana divaricata'', also known as pinwheel flower * Pinwheel scheduling, problem of devising a rotating sequence of tasks with given frequencies * Pinwheel tilings, aperiodic tilings of the plane whose tiles appear in infinitely many orientations * Catherine wheel (firework), a form of pyrotechnic display device also known as a pinwheel * '' Coenocharopa elegans'', also known as the elegant pinwheel snail, a land snail found in Queensland, Australia * "Pinwhe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Pinwheel (toy) A pinwheel is a simple child's toy made of a wheel of paper or plastic curls attached at its axle to a stick by a pin. It is designed to spin when blown upon by a person or by the wind. History A similar toy had developed independently in Polynesia (known as ''pekapeka'' or ''peʻapeʻa'') using either coconut palm leaflets or strips of pandanus leaves; in colder climates like that of New Zealand (the toy also called ''pepepe'' in Māori), phormium leaves are used. Today's most popular style of pinwheels is rooted in East Asia. The design for example is typical of a japanese origami folding technique for a pinwheel. During the nineteenth century in the United States, any wind-driven toy held aloft by a running child was characterized as a whirligig, including pinwheels. Pinwheels provided many children with numerous minutes of enjoyment and amusement. See also * List of toys References External links How to Make a Pinwheelat wikiHow wikiHow is an online wik ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Pinwheel (cryptography) In cryptography, a pinwheel was a device for producing a short pseudorandom sequence of bits (determined by the machine's initial settings), as a component in a cipher machine. A pinwheel consisted of a rotating wheel with a certain number of positions on its periphery. Each position had a "pin", "cam" or "lug" which could be either "set" or "unset". As the wheel rotated, each of these pins would in turn affect other parts of the machine, producing a series of "on" or "off" pulses which would repeat after one full rotation of the wheel. If the machine contained more than one wheel, usually their periods would be relatively prime to maximize the combined period. Pinwheels might be turned through a purely mechanical action (as in the M-209) or electromechanically (as in the Lorenz SZ 40/42). Development The Swedish engineer Boris Caesar Wilhelm Hagelin is credited with having invented the first pinwheel device in 1925. He developed the machine while employed by Emanuel Nobel to o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Pinwheel (shogi) In shogi, the Pinwheel (風車 ''kazaguruma'') is an uncommon opening with the rook on the bottom rank 9 enabling it to switch between a Ranging Rook and Static Rook Static Rook (居飛車 ''ibisha'') Shogi opening, openings is one of two major opening strategies in shogi. In the opening, the major piece of the rook fights from its starting position on the right side of the board (the 2nd file for Black, Sente, ... attack. The pinwheel name comes from the way the king is able to rotate around the gold positioned on the 58 square as if it were a wheel. Against Static Rook Anaguma Example of development from Habu (1992). 1. P-76 P-84 2. S-68 P-34 3. P-66 S-62 4. R-58 K-42 5. K-48 K-32 6. K-38 B-33 7. P-56 P-54 8. S-48 8... K-22 9. S-66 S-53 10. P-46 L-12 11. P-36 K-11 12. S-47 S-32 13. G-48 P-85 14. B-77 G-52 15. N-37 P-44 16. P-55 16... Px55 17. Rx55 P54 18. R-59 G-43 19. P-16 P-14 20. P-26 G-31 21. G-78 P-74 22. B-68 ... [...More Info...] [...Related Items...] OR:* [Wikipedia] [Google] [Baidu]