Class (knowledge representation)

In knowledge representation, a class is a collection of individuals or objects. A class can be defined either by extension, or by intension, using what is called in some ontology languages like OWL. If we follow the Type–token distinction, the ontology is divided into individuals, who are real worlds objects, or events, and types, or classes, who are sets of real world objects. Class expressions or definitions gives the properties that the individuals must fulfill to be members of the class. Individuals that fulfill the property are called Instances.

Relationships

Instantiation

The instantiation relationship is a relation between objects and classes. We say that an object O, say Harry the eagle is an instance of a class, say Eagle. Harry the eagle has all the properties that we can attribute to an eagle, for example his parents were eagles, he's a bird, he's a meat eater and so on. It's a special kind of is a relationship. It's noted Concept assertion () in Description logics, a family of logic based on classes, class assertion

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.

Spyro (series)

Spyro is a series of platform games which primarily features the protagonist Spyro the Dragon and his friend, Sparx the Dragonfly. Since its introduction in 1998, there has been a complete reboot to the series called The Legend of Spyro trilogy, making it a total of ten Spyro games and three Legend of Spyro games. The Spyro series has sold more than 20 million units worldwide. After The Legend of Spyro series concluded, a spin-off franchise under the name of Skylanders was made where Spyro and other related characters were included in.

Games

Spyro the Dragon

Spyro the Dragon was first released in North America on 11 September 1998, for the PlayStation. It was released in Europe on 23 October 1998, In Australia on 15 November 1998 and in Japan on 1 April 1999. It is a platform game that placed the player as Spyro, a small, purple dragon set with the task of freeing his fellow dragons from crystal prisons, which are scattered around their world. Each level is accessed through 'portals' from a main world. The game concludes with a fight between Spyro and the primary antagonist, Gnasty Gnorc. The game sold well, most critics giving it favorable reviews. It also received acclaim for its musical score by Stewart Copeland.

Blink (Plumb album)

Blink is the fifth album by Christian singer Plumb. It was released in 2007 via Curb Records. The album includes the single "In My Arms."

Track listing

Singles

Personnel

Chart performance

Blink (novel)

Blink is a 2003 novel by Christian author Ted Dekker. It was re-released in November 2007 under the title Blink of an Eye, featuring new content and a more expedient storyline. It follows two main characters from a 3rd person perspective. Blink is set in the modern-day United States and in the Middle East, and features a Christian fiction perspective.

Plot summary

Protagonist Seth Border is a college student who has one of the world's highest IQs. One day he begins developing a tremendous skill: the ability to see multiple possible futures. This ability first manifests itself for a few seconds at a time, and gradually exponentiates into an ability to see millions of possibilities that could happen hours and days later. Little does Seth know that when he is thrown together with a Saudi princess, Miriam Al-Asamm, who flees her country to escape oppression, he will soon have the adventure of his life as they explore the truth about Christianity and Seth's gift of precognition while running for their lives.