Observer

From Wikipedia, the free encyclopedia

Observer can have the following meanings:

• Any person who is observing
• A person who is permitted to observe, and report on, the proceedings of an assembly or a meeting but who is not permitted to vote or otherwise participate.
• An aircrew member of a (military) aircraft responsible for searching (usually visually) for intelligence, opposing forces, survivors, and other occurrences of interest to the mission
• Observer (special relativity), a notion from the special relativity theory
• In information theory, any system which receives information from an object.
• A state observer in a control application: in most control systems, not all state variables of the plant can be measured; but in an observable plant the state can be estimated with the help of a state observer, the result often being used for full state feedback.
• Observer (Software), a PHP/MySQL-based network management system
• The Observer, a UK Sunday newspaper
• The Texas Observer, an American political magazine
• A Sri Lankan Sunday and evening newspaper
• A design pattern used in computer programming: see Observer pattern
• An airborne reconnaissance robot used by the Protoss in the StarCraft series.
• Brain Guy, one of many omnipotent aliens in Mystery Science Theater 3000
• "The Observer", a track from the Flaming Lips' 1999 album The Soft Bulletin

[edit] See also

• The Observer (disambiguation)
• The observer effect, changes that the act of observing will make on the phenomenon being observed
• Observer Effect (title), the 87th episode from the television series Star Trek: Enterprise