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Date/Time Thumbnail Dimensions User Comment; current: 02:06, 3 February 2013: 670 × 670 (313 KB): Fry1989: looks awful: 06:52, 2 February 2013: 670 × 670 (313 KB): Fornax: Changed background color from silver to white, outlines from silver to black, according to official regulations.
A limit switch with a roller-lever operator; this is installed on a gate on a canal lock, and indicates the position of a gate to a control system A limit switch mounted on a moving part of a bridge In electrical engineering , a limit switch is a switch operated by the motion of a machine part or the presence of an object.
The set of λ-terms with ⊥ (abbreviated λ⊥-terms) is defined coinductively by the grammar = (.) ().This corresponds to the standard infinitary lambda calculus plus terms containing .
In mathematics, a direct limit of groups is the direct limit of a direct system of groups. These are central objects of study in algebraic topology, especially stable homotopy theory and homological algebra. They are sometimes called stable groups, though this term normally means something quite different in model theory.
The following is a list of CMOS 4000-series digital logic integrated circuits.In 1968, the original 4000-series was introduced by RCA.Although more recent parts are considerably faster, the 4000 devices operate over a wide power supply range (3V to 18V recommended range for "B" series) and are well suited to unregulated battery powered applications and interfacing with sensitive analogue ...
illustrated parts catalog (e.g. by Boeing, Airbus) IR initial release IRS inertial reference system: IRT instrument rating test: IRU inertial reference unit: IRVR instrumented runway visual range: ISA International Standard Atmosphere: ISFD integrated standby flight display: ISIS integrated standby instrument system: ISP integrated switching ...
Louis de Broglie's early results on the pilot wave theory were presented in his thesis (1924) in the context of atomic orbitals where the waves are stationary.Early attempts to develop a general formulation for the dynamics of these guiding waves in terms of a relativistic wave equation were unsuccessful until in 1926 Schrödinger developed his non-relativistic wave equation.
An early switch operating by this principle was invented by Chester I. Hall of the General Electric Company, with a patent filed in 1921 and approved in 1924.Like the modern infinite switch, Hall's invention used a bi-metallic strip, heated by a constant current, to break a connection after a given period of time.