x-ray on indicator

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• Ray system — Crater ray system on the far side of the Moon (Apollo 11 image). A ray system comprises radial streaks of fine ejecta thrown out during the formation of an impact crater, looking a bit like many thin spokes coming from the hub of a wheel. The… …   Wikipedia

• Formation evaluation gamma ray — In the field of formation evaluation, gamma ray log records natural radioactivity emission of formation. Measurement of natural emission of gamma rays in oil and gas wells are particularly helpful because shales and sandstones typically have… …   Wikipedia

• Plan position indicator — The plan position indicator (PPI), is the most common type of radar display. The radar antenna is usually represented in the center of the display, so the distance from it and height above ground can be drawn as concentric circles. As the radar… …   Wikipedia

• cathode-ray tube — /kath ohd ray / a vacuum tube generating a focused beam of electrons that can be deflected by electric fields, magnetic fields, or both. The terminus of the beam is visible as a spot or line of luminescence caused by its impinging on a sensitized …   Universalium

• cathode-ray tube — /ˌkæθoʊd reɪ ˈtjub/ (say .kathohd ray tyoohb) noun Electronics a vacuum tube in which is generated a focused beam of electrons which can be deflected by electric and/or magnetic fields. The terminus of the beam is visible as a spot or line of… …  

• Elder-Ray Index — A technical indicator developed by Alexander Elder that measures the amount of buying and selling pressure in the market. This indicator consists of two separate indicators known as bull power and bear power . These figures allow a trader to… …   Investment dictionary

• electronic horizontal situation indicator — A cathode ray tube (CRT)–based horizontal situation indicator (HSI) that forms part of an electronic flight instrument system (EFIS) …   Aviation dictionary

• plan-position indicator — noun (radar) An apparatus in which the position of reflecting objects is shown on the screen of a cathode ray tube, as if on a plan (abbrev PPI) • • • Main Entry: ↑plan …   Useful english dictionary

• plan position indicator — A cathode ray tube on which radar returns are so displayed as to bear the same relationship to the transmitter as the objects giving rise to them …   Military dictionary

• plan position indicator — A cathode ray tube (CRT) on which radar returns are displayed. The returns on the PPI are oriented relative to the transmitter …   Aviation dictionary

• ultrasonic inspection — A nondestructive test method that employs high frequency mechanical vibration energy to detect and locate structural discontinuities or differences and to measure the thickness of a variety of materials. Radiation frequency is of the order of 0.1 …   Aviation dictionary