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The interval since the last full/new moon and the next spring tide.

Related Terms


  1. The time interval between a change in the input signal to a process control system and the response to the signal.
  2. The time interval, after a response to one signal or event, during which a system is unable to respond to another. Also known as insensitive time.


A device consisting essentially of a stopwatch, for estimating the distance of guns in action by measuring the interval between the flash and the arrival of the sound.


1. The maximum instantaneous load or the maximum average load over a designated interval of time. Also known as peak power. 2. The maximum quantity of a specified material to be carried by a conveyor per minute in a specified period of time.


A delay cap with an extremely short (20500 thousandths of a second) interval between passing of current and explosion. Also known as short-delay detonator.


1. The difference between the kinetic energy and the potential energy of a system of particles, expressed as a function of generalized coordinates and velocities from which Lagrange's equations can be derived. Also known as kinetic potential; Lagrange function. 2. For a dynamical system of fields, a function which plays the same role as the Lagrangian of a system of particles; its integral over a time interval is a maximum or a minimum with respect to infinitesimal variations of the fields, provided the initial and final fields are held fixed.


An alcohol thermometer used to measure low velocities in air circulation, by heating the large bulb of the thermometer above 100 F (38 C) and noting the time it takes to cool from 100 to 95 F (38 to 35 C) or some other interval above ambient temperature, the time interval being a measure of the air current at that location.


A device which operates a set of contacts during a preset time interval and, at the end of the interval, returns the contacts to their normal positions. Also known as timer.


A measure of system performance formed by integrating the square of the system error over a fixed interval of time; this performance measure and its generalizations are frequently used in linear optimal control and estimation theory.


The integral of a force over an interval of time.


An interval based on the moon's transit of the Greenwich celestial meridian, as distinguished from a local interval based on the moon's transit of the local celestial meridian.

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