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In the contact activation system or CAS, three proteins in the blood, factor XII (FXII), prekallikrein (PK) and high molecular weight kininogen (HK), bind to a surface and cause blood coagulation and inflammation. FXII and PK are proteases and HK is a non-enzymatic co-factor. The CAS can activate the kinin–kallikrein system and blood ...
In electrical engineering, a vacuum interrupter is a switch which uses electrical contacts in a vacuum. It is the core component of medium-voltage circuit-breakers, generator circuit-breakers, and high-voltage circuit-breakers. Separation of the electrical contacts results in a metal vapour arc, which is quickly extinguished.
Joseph Herscher is a YouTube personality known for his channel Joseph's Machines. Herscher is a kinetic artist who specializes in making comical chain-reaction machines. [2] He made his first machine, the Lolly Machine, when he was five. [3] He was a 2013 Artist-in-Residence at the McColl Center for Art + Innovation in Charlotte, North Carolina ...
The Misfortune of Being Ned is a 2013 animated short series created by the producers of the Annoying Orange web series. [1] The series centers on the titular character of Ned, voice acted by Steve Zaragoza, a young boy who repeatedly finds himself in unfortunate situations that usually get him killed. [2]
The music video for LMFAO 's song " Party Rock Anthem " stood as the most-liked video on YouTube in 2012, with 1.56 million likes, until the video for Psy 's " Gangnam Style " surpassed it in September that year with more than 1.57 million likes. Following this accomplishment, "Gangnam Style" entered the Guinness World Records book as the most ...
Shape of You" became the second video to reach four billion views in January 2019, [ 27] followed by "See You Again" in February 2019. [ 25] ". Baby Shark Dance" became the second video to reach five billion views in April 2020, [ 62] followed by "Shape of You" in October 2020.
A contact breaker (or "points") is a type of electrical switch, found in the ignition systems of spark-ignition internal combustion engines. The switch is automatically operated by a cam driven by the engine. The timing of operation of the switch is set so that a spark is produced at the right time to ignite the compressed air/fuel mixture in ...
As of Tuesday, an 18-year-old from Texas can lay claim to being the fastest-ever Olympian – at least when it comes to traveling vertically. When Sam Watson set a speed climbing world record of 4 ...