Chad

Coordinates: 15°N 19°E / 15°N 19°E / 15; 19

Chad (ⁱ/tʃæd/; Arabic: تشاد‎ Tshād; French: Tchad), officially the Republic of Chad (Arabic: جمهورية تشاد‎ Jumhūrīyat Tshād; French: République du Tchad), is a landlocked country in Central Africa. It is bordered by Libya to the north, Sudan to the east, the Central African Republic to the south, Cameroon and Nigeria to the southwest and Niger to the west. It is the fifth largest country in Africa in terms of area.

Chad has several regions: a desert zone in the north, an arid Sahelian belt in the centre and a more fertile Sudanian Savanna zone in the south. Lake Chad, after which the country is named, is the largest wetland in Chad and the second-largest in Africa. N'Djamena, the capital, is the largest city. Chad is home to over 200 different ethnic and linguistic groups. Arabic and French are the official languages. Islam and Christianity are the most widely practiced religions.

Beginning in the 7th millennium BC, human populations moved into the Chadian basin in great numbers. By the end of the 1st millennium BC, a series of states and empires rose and fell in Chad's Sahelian strip, each focused on controlling the trans-Saharan trade routes that passed through the region. France conquered the territory by 1920 and incorporated it as part of French Equatorial Africa. In 1960, Chad obtained independence under the leadership of François Tombalbaye. Resentment towards his policies in the Muslim north culminated in the eruption of a long-lasting civil war in 1965. In 1979, the rebels conquered the capital and put an end to the south's hegemony. However, the rebel commanders fought amongst themselves until Hissène Habré defeated his rivals. He was overthrown in 1990 by his general Idriss Déby. Since 2003, the Darfur crisis in Sudan has spilt over the border and destabilised the nation, with hundreds of thousands of Sudanese refugees living in and around camps in eastern Chad.

Pixel

In digital imaging, a pixel, pel, or picture element is a physical point in a raster image, or the smallest addressable element in an all points addressable display device; so it is the smallest controllable element of a picture represented on the screen. The address of a pixel corresponds to its physical coordinates. LCD pixels are manufactured in a two-dimensional grid, and are often represented using dots or squares, but CRT pixels correspond to their timing mechanisms and sweep rates.

Each pixel is a sample of an original image; more samples typically provide more accurate representations of the original. The intensity of each pixel is variable. In color image systems, a color is typically represented by three or four component intensities such as red, green, and blue, or cyan, magenta, yellow, and black.

In some contexts (such as descriptions of camera sensors), the term pixel is used to refer to a single scalar element of a multi-component representation (more precisely called a photosite in the camera sensor context, although the neologism sensel is sometimes used to describe the elements of a digital camera's sensor), while in others the term may refer to the entire set of such component intensities for a spatial position. In color systems that use chroma subsampling, the multi-component concept of a pixel can become difficult to apply, since the intensity measures for the different color components correspond to different spatial areas in such a representation.

IP address

An Internet Protocol address (IP address) is a numerical label assigned to each device (e.g., computer, printer) participating in a computer network that uses the Internet Protocol for communication. An IP address serves two principal functions: host or network interface identification and location addressing. Its role has been characterized as follows: "A name indicates what we seek. An address indicates where it is. A route indicates how to get there."

The designers of the Internet Protocol defined an IP address as a 32-bit number and this system, known as Internet Protocol Version 4 (IPv4), is still in use today. However, because of the growth of the Internet and the predicted depletion of available addresses, a new version of IP (IPv6), using 128 bits for the address, was developed in 1995. IPv6 was standardized as RFC 2460 in 1998, and its deployment has been ongoing since the mid-2000s.

IP addresses are usually written and displayed in human-readable notations, such as 172.16.254.1 (IPv4), and 2001:db8:0:1234:0:567:8:1 (IPv6).

Minecraft

Minecraft is a sandbox video game originally created by Swedish programmer Markus "Notch" Persson and later developed and published by Mojang. The creative and building aspects of Minecraft enable players to build constructions out of textured cubes in a 3D procedurally generated world. Other activities in the game include exploration, resource gathering, crafting, and combat. Multiple gameplay modes are available, including survival mode where the player must acquire resources to build the world and maintain health, a creative mode where players have unlimited resources to build with and the ability to fly, an adventure mode where players play custom maps created by other players, and a spectator mode where players can fly around and clip through blocks, but cannot place or destroy any. The PC version of the game is renowned for its third-party mods, which add various new items, characters, worlds, and quests to the game.

The alpha version was publicly released for PC on May 17, 2009, and after gradual updates, the full version was released on November 18, 2011. A version for Android was released a month earlier on October 7, and an iOS version was released on November 17, 2011. The game was released on the Xbox 360 as an Xbox Live Arcade game on May 9, 2012; on the PlayStation 3 on December 17, 2013; on the PlayStation 4 on September 4, 2014; on the Xbox One the next day; on the PlayStation Vita on October 14, 2014; and on the Wii U on December 17, 2015. On December 10, 2014, a Windows Phone version was released. All versions of Minecraft receive periodic updates, with the console editions being co-developed by 4J Studios.

Gamer

A "gamer" is someone who plays interactive games, such as video games or tabletop games. Although the term "gamer" may commonly refer to video game players, the term may also be applied to players of other forms of games, such as tabletop games or physical games. Additionally, in some countries such as the United Kingdom, the term "gaming" refers to legalized gambling, which can take both traditional (tabletop) and digital forms (akin to video games), so in these areas gamers may also refer to people who gamble. The term also includes people who work on methods to gamify technologies relevant to gameplay.

There are many gamer communities around the world. Many of these take the form of discussion forums and other virtual communities, as well as college or university social clubs.

Videogamers

In the United States, the average video game player is 30 years old and has been playing video games for over 12 years. In the UK as of 2007, the average video game player was over 23 years old, had played video games for over 10 years, and spent around 11 hours a week playing video games.