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The plasma approximation: The plasma approximation applies when the plasma parameter Λ, [26] representing the number of charge carriers within the Debye sphere is much higher than unity. [ 19 ] [ 20 ] It can be readily shown that this criterion is equivalent to smallness of the ratio of the plasma electrostatic and thermal energy densities.
The concept of Discord came from Jason Citron, who had founded OpenFeint, a social gaming platform for mobile games, [ 13] and Stanislav Vishnevskiy, who had founded Guildwork, another social gaming platform. Citron sold OpenFeint to GREE in 2011 for US$104 million, [ 14] which he used to found Hammer & Chisel, a game development studio, in ...
A plasma ball with filaments extending between the inner and outer spheres. A plasma ball, plasma globe, or plasma lamp is a clear glass container filled with noble gases, usually a mixture of neon, krypton, and xenon, that has a high-voltage electrode in the center of the container. When voltage is applied, a plasma is formed within the container.
A plasma propulsion engine is a type of electric propulsion that generates thrust from a quasi-neutral plasma. This is in contrast with ion thruster engines, which generate thrust through extracting an ion current from the plasma source, which is then accelerated to high velocities using grids/ anodes. These exist in many forms (see electric ...
Instant messaging. Instant messaging ( IM) technology is a type of synchronous computer-mediated communication involving the immediate ( real-time) transmission of messages between two or more parties over the Internet or another computer network. Originally involving simple text message exchanges, modern IM applications and services (also ...
Discord is a freemium and proprietary chat room program available for web browsers, Windows, Mac, Linux, Android, and iOS. Editors can chat by text like WP:IRC, but also by voice calls, unlike IRC. In 2016, an unofficial Wikimedia Discord server was founded. It is moderated by several trusted Wikimedians, and members should follow the ...
Plasma speaker. Plasma speakers or ionophones are a form of loudspeaker which varies air pressure via an electrical plasma instead of a solid diaphragm. The plasma arc heats the surrounding air causing it to expand. Varying the electrical signal that drives the plasma and connected to the output of an audio amplifier, the plasma size varies ...
A plasma etcher, or etching tool, is a tool used in the production of semiconductor devices. A plasma etcher produces a plasma from a process gas, typically oxygen or a fluorine -bearing gas, using a high frequency electric field, typically 13.56 MHz. A silicon wafer is placed in the plasma etcher, and the air is evacuated from the process ...