Pearl

A pearl is a hard object produced within the soft tissue (specifically the mantle) of a living shelled mollusc. Just like the shell of a clam, a pearl is composed of calcium carbonate in minute crystalline form, which has been deposited in concentric layers. The ideal pearl is perfectly round and smooth, but many other shapes (baroque pearls) occur. The finest quality natural pearls have been highly valued as gemstones and objects of beauty for many centuries. Because of this, pearl has become a metaphor for something rare, fine, admirable and valuable.

The most valuable pearls occur spontaneously in the wild, but are extremely rare. These wild pearls are referred to as natural pearls. Cultured or farmed pearls from pearl oysters and freshwater mussels make up the majority of those currently sold. Imitation pearls are also widely sold in inexpensive jewelry, but the quality of their iridescence is usually very poor and is easily distinguished from that of genuine pearls. Pearls have been harvested and cultivated primarily for use in jewelry, but in the past were also used to adorn clothing. They have also been crushed and used in cosmetics, medicines and paint formulations.

Pearl (literary magazine)

Pearl was an American literary journal published between 1974 and 2014 in Long Beach, California.

History and profile

Pearl was founded by Joan Jobe Smith in 1974. The first issue appeared in May 1974. It was edited by Joan Jobe Smith, Marilyn Johnson, and Barbara Hauk. Pearl was based in Long Beach. It released an annual fiction issue and an annual poetry issue as well as hosting an annual poetry prize.

After several issues published Pearl went defunct until 1986 when Joan Jobe Smith and Marilyn Johnson relaunched it.

The magazine ceased publication in 2014.

Contributors

See also

References

External links

Pearl (disambiguation)

A pearl is a hard object produced by mollusks.

Pearl may also refer to:

People

Nicknamed Pearl

Places

Literature

Music

Advice (complexity)

In computational complexity theory, an advice string is an extra input to a Turing machine that is allowed to depend on the length n of the input, but not on the input itself. A decision problem is in the complexity class P/f(n) if there is a polynomial time Turing machine M with the following property: for any n, there is an advice string A of length f(n) such that, for any input x of length n, the machine M correctly decides the problem on the input x, given x and A.

The most common complexity class involving advice is P/poly where advice length f(n) can be any polynomial in n. P/poly is equal to the class of decision problems such that, for every n, there exists a polynomial size Boolean circuit correctly deciding the problem on all inputs of length n. One direction of the equivalence is easy to see. If, for every n, there is a polynomial size Boolean circuit A(n) deciding the problem, we can use a Turing machine that interprets the advice string as a description of the circuit. Then, given the description of A(n) as the advice, the machine will correctly decide the problem on all inputs of length n. The other direction uses a simulation of a polynomial-time Turing machine by a polynomial-size circuit as in one proof of Cook's Theorem. Simulating a Turing machine with advice is no more complicated than simulating an ordinary machine, since the advice string can be incorporated into the circuit.

Young (crater)

Young is a lunar crater that is located in the rugged southeast part of the Moon's near side. It lies to the east of the crater Metius, and southeast of Rheita. The long Vallis Rheita follows a line tangential to the southwest rim of Rheita, and cuts a wide trough through the southwest floor and outer rim of Young.

The surviving part of the crater is a worn, eroded formation that has seen better times. The rim and inner wall can still be followed across the surface, but it is indented and notched by smaller impacts. The inner floor contains a pair of small, bowl-shaped craters designated Young A and Young B.

To the south of Young, the valley is overlain by Young D, a somewhat less eroded feature than Young. The valley continues intermittently to the southeast, spanning a total distance of about 500 kilometers. This is the longest valley on the near side of the Moon.

Satellite craters

By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Young.

Young (Kenny Chesney song)

"Young" is a song written by Naoise Sheridan, Steve McEwan and Craig Wiseman, and recorded by American country music singer Kenny Chesney. It was released in December 2001 as the lead single from his album No Shoes, No Shirt, No Problems. It peaked at number 2 on the U.S. Billboard Hot Country Singles & Tracks chart and at number 35 on the U.S. Billboard Hot 100 chart.

Content

The narrator reflects on what he did when he was in his teenage years.

Music video

The music video was Chesney's first of many videos that were by Shaun Silva and was released in January 2002. It was filmed in Sanford, Florida at the old bridge over the St. Johns River and on the banks of the river.

Chart positions

"Young" debuted at number 50 on the U.S. Billboard Hot Country Singles & Tracks chart for the week of December 29, 2001.

Year-end charts

References

External links

Mothers (music venue)

Mothers (formerly the Carlton Ballroom) was a club in the Erdington district of Birmingham, West Midlands, during the late 1960s and early 1970s. Mothers opened above an old furniture store in Erdington High Street on 9 August 1968. The club, run by John 'Spud' Taylor and promoter Phil Myatt, closed its doors on 3 January 1971. Between these times, more than 400 acts performed there, many of whom went on to greater success.

Well known live recordings that took place in Mothers were the recordings that Pink Floyd released on Ummagumma, recorded on 27 April 1969., and parts of "Facelift" by Soft Machine, released on Third, recorded 11 January 1970.

The Who performed Tommy and Traffic's world debut took place at Mothers along with fledgling heavy metal bands like Black Sabbath playing some of their earliest gigs there.

Some of the other well known rock bands and artists to play Mothers include: Family, Fleetwood Mac, John Mayall's Bluesbreakers, Eclection, Edgar Broughton Band, Free, Roy Harper, Blodwyn Pig, Strawbs, Quintessence, Steppenwolf, Deep Purple, The Deviants, Jethro Tull, Jon Hiseman's Colosseum, Skid Row (with Gary Moore), The Nice, Tyrannosaurus Rex, Elton John, King Crimson, Led Zeppelin, Soft Machine, The Chicago Transit Authority, Moby Grape, Canned Heat (there is a reference to the club in the sleeve notes of their 1969 compilation Canned Heat Cookbook) and the Bonzo Dog Doo-Dah Band and Karakorum featuring Martin Chambers later with The Pretenders.