near-vacuum
1vacuum tube — ► NOUN ▪ a sealed glass tube containing a near vacuum which allows the free passage of electric current …
2Vacuum — This article is about empty physical space or the absence of matter. For other uses, see Vacuum (disambiguation). Free space redirects here. For other uses, see Free space (disambiguation). Pump to demonstrate vacuum In everyday usage, vacuum is… …
3Vacuum flask — Thermos redirects here. For other uses, see Thermos (disambiguation). This article is about the vacuum insulated flask. For the flask used in filtration under vacuum, see Büchner flask. Domestic vacuum flask, used for maintaining the temperature… …
4vacuum — n. & v. n. (pl. vacuums or vacua) 1 a space entirely devoid of matter. 2 a space or vessel from which the air has been completely or partly removed by a pump etc. 3 a the absence of the normal or previous content of a place, environment, etc. b… …
5Vacuum insulated panel — A Vacuum Insulated Panel (VIP) uses the insulating effects of a vacuum to produce much higher R values than conventional insulation. Conventional insulation produces an R value of eight or less per inch (fiberglass being towards the lower end and …
6vacuum tube — noun a sealed glass tube containing a near vacuum which allows the free passage of electric current …
7Vacuum swing adsorption — Vacuum Swing Absorption (VSA) is a non cryogenic gas separation technology. Using special solids, or absorbents, VSA segregates certain gases from a gaseous mixture under minimal pressure according to the species molecular characteristics and… …
8Vacuum sewer — Vacuum sewers were first installed in Europe in 1882 but until the last 30 years it had been relegated to a niche market. The first who has applied the negative pressure drainage (so called vacuum sewerage) was the Dutch engineer Liernur in the… …
9Vacuum energy — is an underlying background energy that exists in space even when devoid of matter (known as free space). The vacuum energy is deduced from the concept of virtual particles, which is itself derived from the energy time uncertainty principle. Its… …
10Near-field scanning optical microscope — Near field scanning optical microscopy (NSOM/SNOM) is a microscopic technique for nanostructure investigation that breaks the far field resolution limit by exploiting the properties of evanescent waves. This is done by placing the detector very… …
