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  2. Portal 2 - Wikipedia

    en.wikipedia.org/wiki/Portal_2

    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 .

  3. Portal frame - Wikipedia

    en.wikipedia.org/wiki/Portal_frame

    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.

  4. Still Alive - Wikipedia

    en.wikipedia.org/wiki/Still_Alive

    Still Alive. " Still Alive " is the song featured in the closing credits of the 2007 video game Portal. It was composed and arranged by Jonathan Coulton and was performed by Ellen McLain, who voiced the Portal antagonist and in-game singer of the song, GLaDOS. The song originated in a meeting between two Valve developers and Coulton about him ...

  5. Respiratory System: How It Works, Common Issues, and More

    www.healthline.com/health/respiratory-system

    More serious allergies can lead to anaphylaxis and closing of the airways. Common cold. The common cold is an upper respiratory tract infection that can be triggered by over 200 viruses. Symptoms ...

  6. Grievance redressal - Wikipedia

    en.wikipedia.org/wiki/Grievance_Redressal

    Grievance Redressal is a management- and governance-related process used commonly in India. While the term "Grievance Redressal" primarily covers the receipt and processing of complaints from citizens and consumers, a wider definition includes actions taken on any issue raised by them to avail services more effectively.

  7. Portal axle - Wikipedia

    en.wikipedia.org/wiki/Portal_axle

    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 ...

  8. List of Portal characters - Wikipedia

    en.wikipedia.org/wiki/List_of_Portal_characters

    Portal 2: Lab Rat (2011) (first full appearance) Designed by. Michael Avon Oeming (young appearance) (Portal 2: Lab Rat) Andrea Wicklund (older appearance) (Portal 2: Lab Rat) Voiced by. Unknown (vocalizations in some music tracks) Doug Rattmann, often referred to as the " Ratman" is a character in both Portal and Portal 2.

  9. Ladder paradox - Wikipedia

    en.wikipedia.org/wiki/Ladder_paradox

    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 ...