In computer graphics and digital photography, a raster graphic represents a two-dimensional picture as a rectangular matrix or grid of square pixels, viewable via a computer display, paper, or other display medium. A raster is technically characterized by the width and height of the image in pixels and by the number of bits per pixel. Raster images are stored in image files with varying dissemination, production, generation, and acquisition formats.
Tic-tac-toe, noughts and crosses, or Xs and Os is a paper-and-pencil game for two players who take turns marking the spaces in a three-by-three grid with X or O. The player who succeeds in placing three of their marks in a horizontal, vertical, or diagonal row is the winner. It is a solved game, with a forced draw assuming best play from both players.
The visible spectrum is the portion of the electromagnetic spectrum that is visible to the human eye. Electromagnetic radiation in this range of wavelengths is called visible light or simply light. A typical human eye will respond to wavelengths from about 380 to about 750 nanometers. In terms of frequency, this corresponds to a band in the vicinity of 400–790 terahertz. These boundaries are not sharply defined and may vary per individual. Under optimal conditions these limits of human perception can extend to 310 nm (ultraviolet) and 1100 nm. The optical spectrum is sometimes considered to be the same as the visible spectrum, but some authors define the term more broadly, to include the ultraviolet and infrared parts of the electromagnetic spectrum as well.
An overhead line or overhead wire is an electrical cable that is used to transmit electrical energy to electric locomotives, trolleybuses or trams. It is known variously as:
The emission spectrum of a chemical element or chemical compound is the spectrum of frequencies of electromagnetic radiation emitted due to an electron making a transition from a high energy state to a lower energy state. The photon energy of the emitted photon is equal to the energy difference between the two states. There are many possible electron transitions for each atom, and each transition has a specific energy difference. This collection of different transitions, leading to different radiated wavelengths, make up an emission spectrum. Each element's emission spectrum is unique. Therefore, spectroscopy can be used to identify elements in matter of unknown composition. Similarly, the emission spectra of molecules can be used in chemical analysis of substances.
The display resolution or display modes of a digital television, computer monitor or display device is the number of distinct pixels in each dimension that can be displayed. It can be an ambiguous term especially as the displayed resolution is controlled by different factors in cathode ray tube (CRT) displays, flat-panel displays and projection displays using fixed picture-element (pixel) arrays.
A spectral color is a color that is evoked by monochromatic light, i.e. either a single wavelength of light in the visible spectrum, or by a relatively narrow band of wavelengths. Every wavelength of visible light is perceived as a spectral color; when viewed as a continuous spectrum, these colors are seen as the familiar rainbow.
Cosmic latte is the average color of the universe, found by a team of astronomers from Johns Hopkins University (JHU). In 2002, Karl Glazebrook and Ivan Baldry determined that the average color of the universe was a greenish white, but they soon corrected their analysis in a 2003 paper in which they reported that their survey of the light from over 200,000 galaxies averaged to a slightly beigeish white. The hex triplet value for cosmic latte is #FFF8E7.
Railway electrification systems using alternating current (AC) at 25 kilovolts (kV) are used worldwide, especially for high-speed rail. It is usually supplied at the standard utility frequency, which simplifies traction substations. The development of 25Kv AC electrification is closely connected with that of successfully using utility frequency.
Amidar is a video game developed by Konami and released in arcades in 1981 by Stern. The format is similar to that of Pac-Man: the player moves around a fixed rectilinear lattice, attempting to visit each location on the board while avoiding the enemies. When each spot has been visited, the player moves to the next level. The game and its name have their roots in the Japanese lot drawing game Amidakuji. The bonus level in Amidar is a nearly exact replication of an Amidakuji game and the way the enemies move conform to the Amidakuji rules; this is referred to in the attract mode as "Amidar movement."
Alstom Traxx is a modular product platform of mainline diesel-electric and electric locomotives produced originally by Bombardier Transportation and later Alstom, which was built in both freight and passenger variants. The first version was a dual-voltage AC locomotive built for German railways from the year 2000. Later types included DC versions, as well as quadruple-voltage machines, able to operate on most European electrification schemes: 1.5/3.0 kV DC and 15/25 kV AC. The family was expanded in 2006 to include diesel-powered versions. Elements common to all variants include steel bodyshells, two bogies with two powered axles each, three-phase asynchronous induction motors, cooling exhausts on the roof edges, and wheel disc brakes.
Cuthbert Goes Walkabout is a maze video game written by Steve Bak for the Dragon 32/64 and published by Microdeal in 1983. A TRS-80 Color Computer port was released the same year. Atari 8-bit family and Commodore 64 versions followed in 1984. The game features the character Cuthbert. The game is based on the Konami arcade game Amidar.
Hakoah Maccabi Amidar Ramat Gan Football Club is an Israeli football club based in Ramat Gan. The club is currently in Liga Alef South division and plays at the Winter Stadium in Ramat Shikma, a neighbourhood of Ramat Gan.
Magical Tetris Challenge is a puzzle game by Capcom for the Nintendo 64, Game Boy Color, and PlayStation. It is a version of Tetris featuring Disney characters. It is one of the few Nintendo 64 games to be entirely in 2D.
Potty Painter, also known as Potty Painter in the Jungle, is a video game for the ZX Spectrum, Commodore 64, and VIC-20 computers and released by Rabbit Software in December 1983. It is a grid capture game with bonus games between levels.
Iore, often stylized IORE, is a class of 34 electric locomotives built by Adtranz and its successor Bombardier Transportation for the Swedish mining company LKAB's railway division Malmtrafik. The class is a variation of Adtranz's Octeon modular product platform, thus related to Bombardier's later TRAXX platform. The locomotives haul iron ore freight trains on the Iron Ore Line and Ofoten Line in Sweden and Norway, respectively. The 8,600-tonne 68-car trains are hauled by two single-ended Co′Co′ locomotives, each with a power output of 5,400 kW (7,200 hp). Each operates with 600 kilonewtons tractive effort and has a maximum speed of 80 km/h (50 mph). Delivery of the first series of 18 locomotives was made from 2000 to 2004, and they replaced some of the aging Dm3 and El 15 units. In 2007, eight more vehicles were ordered, with production to be completed by 2011, by which time, another four double units were ordered. These units were scheduled to be delivered from 2013 to 2014.
Ringball is a traditional South African sport that stems from basketball and has been played since 1907. The sport is now promoted in South Africa, Namibia, Botswana, Lesotho, India, and Mauritius to establish Ringball as an international sport. The sport is played by both men and women teams.
Triple Punch is a horizontally-scrolling grid capture game released in arcades by K.K. International (K.K.I.) in 1982. The goal is to color all of the lines on a grid while avoiding or punching pursuers. It was sold both as a conversion kit and as an upright cabinet.
Kid Grid is a grid capture game which borrows heavily from the 1981 arcade video game Amidar. Written by Arti Haroutunian for the Atari 8-bit family, it was published by Tronix in 1982. A Commodore 64 port from the same programmer was released in 1983.
