Doctor Who

Doctor Who is a British science-fiction television programme produced by the BBC from 1963 to the present day. The programme depicts the adventures of the Doctor, a Time Lord—a space and time-travelling humanoid alien. He explores the universe in his TARDIS, a sentient time-travelling space ship. Its exterior appears as a blue British police box, which was a common sight in Britain in 1963 when the series first aired. Accompanied by companions, the Doctor combats a variety of foes, while working to save civilisations and help people in need.

The show is a significant part of British popular culture, and elsewhere it has become a cult television favourite. The show has influenced generations of British television professionals, many of whom grew up watching the series. The programme originally ran from 1963 to 1989. There was an unsuccessful attempt to revive regular production in 1996 with a backdoor pilot, in the form of a television film. The programme was relaunched in 2005 by Russell T Davies, who was showrunner and head writer for the first five years of its revival, produced in-house by BBC Wales in Cardiff. The first series of the 21st century featured Christopher Eccleston in the title role and was produced by the BBC. Series two and three had some development money contributed by the Canadian Broadcasting Corporation (CBC), which was credited as a co-producer.Doctor Who also spawned spin-offs in multiple media, including Torchwood (2006–2011) and The Sarah Jane Adventures (2007–2011), both created by Russell T Davies; K-9 (2009–2010); and a single pilot episode of K-9 and Company (1981). There also have been many spoofs and cultural references to the character in other media.

Class (set theory)

In set theory and its applications throughout mathematics, a class is a collection of sets (or sometimes other mathematical objects) that can be unambiguously defined by a property that all its members share. The precise definition of "class" depends on foundational context. In work on Zermelo–Fraenkel set theory, the notion of class is informal, whereas other set theories, such as Von Neumann–Bernays–Gödel set theory, axiomatize the notion of "proper class", e.g., as entities that are not members of another entity.

A class that is not a set (informally in Zermelo–Fraenkel) is called a proper class, and a class that is a set is sometimes called a small class. For instance, the class of all ordinal numbers, and the class of all sets, are proper classes in many formal systems.

Outside set theory, the word "class" is sometimes used synonymously with "set". This usage dates from a historical period where classes and sets were not distinguished as they are in modern set-theoretic terminology. Many discussions of "classes" in the 19th century and earlier are really referring to sets, or perhaps to a more ambiguous concept.

470 (dinghy)

The 470 (Four-Seventy) is a double-handed monohull planing dinghy with a centreboard, Bermuda rig, and centre sheeting. The name is the overall length of the boat in centimetres (i.e., the boat is 4.70 metres long). The hull is fibreglass with integral buoyancy tanks. The 470 is equipped with spinnaker and trapeze, making teamwork necessary to sail it well. It has a large sail-area-to-weight ratio, and is designed to plane easily.

The 470 is a popular class with both individuals and sailing schools, offering a good introduction to high-performance boats without being excessively difficult to handle. It is not a boat designed for beginners; however, its earlier designed smaller sister, the 420, is a stepping stone to the 470. The 470 is an International Sailing Federation International Class and has been an Olympic class since the 1976 games. The Class was initially an open class, but since the 1988 games there have been separate events for men and women.

History

The 470 was designed in 1963 by the Frenchman André Cornu as a modern fibreglass planing dinghy to appeal to sailors of different sizes and ages. This formula succeeded, and the boat spread around the world. In 1969, the class was given international status and it has been an Olympic class since 1976. In 1988, the first Olympic women's sailing event used the 470.

Pure (No Angels album)

Pure is the third studio album by all-female German pop group No Angels. It was released by Polydor's subsidiary Cheyenne Records on August 25, 2003 in German-speaking Europe and is the band's only album without founding member Jessica Wahls, who later rejoined the group for their The Best of No Angels the same year. Recorded during Wahls's pregnancy break — which would result into officially leaving the group prior to the album's release —, the album marked the No Angels' first studio release as a quartet and their final album before their temporary disbandment in fall 2003.

Production was helmed by frequent collaborators Thorsten Brötzmann and Peter Ries, with additional songwriting and production contribution from Siedah Garrett, Perky Park, Nigel Rush, Twin, and band member Lucy Diakovska. Despite not selling as well as their previous two albums Elle'ments (2001) and Now... Us! (2002), it became the No Angels' third consecutive chart-topper on the German Media Control albums chart and was eventually certified gold by the BVMI. It peaked at number two and nine in Austria and Switzerland, respectively. Media reception for Pure was generally mixed, although it earned the group their strongest reviews yet.Pure spawned three singles, including the band's fourth number-one hit "No Angel (It's All in Your Mind)", summer-lite "Someday" and Twin-produced "Feelgood Lies."

Pure (Chris Potter album)

Pure is a studio album from saxophonist Chris Potter released 1994 for Concord Records. Appearing on the album is frequent collaborator John Hart on guitar, in addition to pianist and organist Larry Goldings. According to Neil Tesser, Goldings plays with "virtually none of the traditional organ-jazz fare" on this album.

Personnel

References

Pure (programming language)

Pure is a dynamically typed, functional programming language based on term rewriting. It has facilities for user-defined operator syntax, macros, multiple-precision numbers, and compilation to native code through the LLVM. It is the successor to the Q programming language.

Pure comes with an interpreter and debugger, provides automatic memory management, and has powerful functional and symbolic programming capabilities as well as interface to C libraries (e.g. for numerics, low-level protocols, and other such tasks). At the same time, Pure is a "small" language designed from scratch; its interpreter is not large, and the library modules are written in Pure itself. The syntax of Pure resembles that of Miranda and Haskell, but it is a free-format language and thus uses explicit delimiters (rather than indentation) to indicate program structure.

The Pure language is a successor of the Q language created previously by the same author, Albert Gräf at the University of Mainz in Germany. Compared to Q, it offers some important new features (in particular, local functions with lexical scoping, efficient vector and matrix support and the built-in C interface) and programs run much faster as they are JIT-compiled to native code on the fly. Pure is mostly aimed at mathematical applications and scientific computing currently, but its interactive interpreter environment, the C interface and the growing collection of addon modules make it suitable for a variety of other applications, such as artificial intelligence, symbolic computation, and real-time multimedia processing.