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Portal 2 is a 2011 puzzle-platform game developed by Valve for Windows, Mac OS X, Linux, PlayStation 3, and Xbox 360. The digital PC version is distributed online by Valve's Steam service, while all retail editions were distributed by Electronic Arts. A port for the Nintendo Switch was included as part of Portal: Companion Collection .
Portal frame is a construction technique where vertical supports are connected to horizontal beams or trusses via fixed joints with designed-in moment -resisting capacity. [1] The result is wide spans and open floors. Portal frame structures can be constructed using a variety of materials and methods.
The ladder paradox (or barn-pole paradox) is a thought experiment in special relativity. It involves a ladder, parallel to the ground, travelling horizontally at relativistic speed (near the speed of light) and therefore undergoing a Lorentz length contraction. The ladder is imagined passing through the open front and rear doors of a garage or ...
Portal axle. A portal axle (or portal gear lift) is an off-road vehicle suspension and drive technology where the axle tube or the half-shaft is offset from – usually above – the center of the wheel hub and where driving power is transferred to each wheel via a simple gearbox, built onto each hub. [1] It gives two advantages: ground ...
High frequency motions may explain the local spalling of rock or concrete along planes of weakness. These frequencies, which rapidly attenuate with distance, may be expected mainly at small distances from the causative fault. Ground motion may be amplified upon incidence with a tunnel if wavelengths are between one and four times the tunnel ...
"Want You Gone" Jonathan Coulton, who provided the song "Still Alive" for the first Portal, was asked to compose the game's final credits song, "Want You Gone".. Jonathan Coulton's song "Still Alive", which is sung by GLaDOS (voiced by Ellen McLain) over Portal ' s end credits, was considered a large part of Portal's success; in designing Portal 2, Valve desired to incorporate more music into ...
Nonetheless, it is often called simply the Web, and also often the web; see Capitalization of Internet for details. In Mandarin Chinese, World Wide Web is commonly translated via a phono-semantic matching to wàn wéi wǎng ( 万维网 ), which satisfies www and literally means "10,000-dimensional net", a translation that reflects the design ...
Portal. : Physics. Physics is the natural science of matter, involving the study of matter, its fundamental constituents, its motion and behavior through space and time, and the related entities of energy and force. Physics is one of the most fundamental scientific disciplines, with its main goal being to understand how the universe behaves.