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Ultra-high vacuum (often spelled ultrahigh in American English, UHV) is the vacuum regime characterised by pressures lower than about 1 × 10 −6 pascals (1.0 × 10 −8 mbar; 7.5 × 10 −9 Torr). UHV conditions are created by pumping the gas out of a UHV chamber.
The langmuir (symbol: L) is a unit of exposure (or dosage) to a surface (e.g. of a crystal) and is used in ultra-high vacuum (UHV) surface physics to study the adsorption of gases. It is a practical unit, and is not dimensionally homogeneous, and so is used only in this field. It is named after American physicist Irving Langmuir.
On July 14, 2022, YouTube made a special playlist and video celebrating the 317 music videos to have hit 1 billion views and joined the "Billion Views Club". [65] [66] On April 1, 2024, the communications app Discord incorporated a short trailer video into their in-app April Fools' Day prank regarding loot boxes. The video automatically looped ...
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Alternative Influence: Broadcasting the Reactionary Right on YouTube is a 2018 report by researcher Rebecca Lewis published at the think tank Data & Society that performs network analysis on a collection of 65 political influencers on 81 YouTube channels. Lewis argues that this network propagates right-wing ideology.
We tend to associate testosterone with male libido, muscle mass, hair growth, and basically everything that makes a biological male present as male. But until the recent explosion of conversation ...
There are less than 20 days until Christmas but for some Americans, holiday celebrations commence even sooner. While it's not celebrated nationwide, St. Nicholas Day holds a special place for ...
The UHV grid will aid China's plan of electrification and decarbonization, [15] and enable integration of renewable energy by removing the transmission bottleneck that is currently limiting expansions in wind and solar generation capacity whilst further developing the market for long-range electric vehicles in China.