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An alphabetical listing of General terms and items.
The half of a bastion made when bisected at the capital, consisting of one flank and one face. See bastion, demibastion.
Two active elements or strain gages.
The merlon at the end of a parapet. See merlon.
See demilune, moon, ravelin.
A outer defence in the form of a semi-circular barbican. See barbican.
One way at a time data communication; both devices can transmit and receive data, but only one at a time.
Originally a type of rectangular keep, which later developed into a round design with more than one storey, including a main hall and apartments. See keep.
A gun loop which was especially designed for the use of hand guns. See gun loop.
An interface procedure that is based on status/data signals that assure orderly data transfer as opposed to asynchronous exchange.
Output in a permanent form (usually a printout) rather than in temporary form, as on disk or display terminal.
The electrical, mechanical and electromechanical equipment and parts associated with a computing system, as opposed to its firmware or software.
The part of a German Ganerbenburg, which was occupied by a branch of the family to whom the castle belonged. (G. house).
The loss of pressure in a flow system measured using a length parameter (i.e., inches of water, inches of mercury).
Pressure in terms of the height of fluid, P = yrg, where r = fluid density and y = the fluid column heights. Expression of a pressure in terms of the height of fluid, r = yrg, where r is fluid density and y = the fluid column height. g = the acceleration of gravity.
Thermal energy. Heat is expressed in units of calories or BTU's.
1. Thermodynamic. A body which can absorb thermal energy. 2. Practical. A finned piece of metal used to dissipate the heat of solid state components mounted on it.
The process of thermal energy flowing from a body of high energy to a body of low energy. Means of transfer are
A process for treating metals where heating to a specific temperature and cooling at a specific rate changes the properties of the metal.
A long iron spiked wooden beam set on a pivot. When rotated, it always presented a front of spikes, its purpose was to block passages and approaches.
A door stuck with protruding iron spikes. The door was hinged at the top and suspended in the open position by a rope. This rope was cut or released to effect a surprise blockage of the gateway or passage where it was situated.
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A beam stuck full of protruding iron spikes which was thrown into a breach to render it impassable.
Units in which frequency is expressed. Synonymous with cycles per second.
Refers to a base sixteen number system using the characters 0 through 9 and A through F to represent the values. Machine language programs are often written in hexadecimal notation.
Turreted defences of the Hittites (ie. the fortress of Sinjerli (10th to 8th centuries B.C.).
A fort which normally covered an entire hill top, sometimes as much as an area of several acres, and was enclosed by either a dry stone wall or earthen ramparts. A protective ditch was on either the inside or outside of the surrounding wall. See multivallate hill fort.
A drawbridge introduced during the 14th century. The far end of the drawbridge was attached by ropes or chains to long beams of wood which were fitted with counter balances on their inner ends. See bascule bridge, drawbridge.
A Japanese castle which was developed after the necessity of the yamajiro fortification declined with the cessation of civil war in the 17th century. These castles were built on the plains and served as administration centres of the surrounding area. See hirayamajiro, yamajiro. (J. flatland castle).
A Japanese castle which was constructed on a hill on a plain, thus taking the positional advantage of the surrounding area. See hirajiro, yamajiro. (J. flatland hill castle).
A covered wooden gallery built out from the parapet of a tower or curtain wall supported on corbels, providing for vertical defence of the area below thus reducing the amount of dead ground. The hoardings had a major disadvantage since they were made of timber they were prone to firing, so they were eventually replaced by stone machicolations. In times of peace the hoardings could be removed. See brattice (2).
A type of German castle.
A German castle built on a naturally strong site, usually a hill, all the defences were constructed on the lines of approach and the entrances. Also known as a German hill castle. See schildmauer. (G. hohen, hill; burg, castle).
Meter HOLD is an external input which is used to stop the A/D process and freeze the display. BCD HOLD is an external input used to freeze the BCD output while allowing the A/D process to continue operation.
A bastion where the ramparts extend only along the flanks and the faces. See bastion.
The main or inner fortified compound of a Japanese castle dating from the 16th century.
Defines the basis for the measurement of mechanical stresses via the strain measurement. The gradient of Hooke's line is defined by the ratio of which is equivalent to the Modulus of Elasticity E (Young's Modulus).
A Japanese term meaning ditch or moat.
(1) An outwork consisting of two long curtains extending from the main works and was fronted by two demibastions connected by a short curtain, forming an outer bailey, it was smaller than a crownwork but serving the same purpose. (2) An earth spur provided with banks and ditches.
A small outwork, round or oval in shape, provided with a parapet.
The primary or controlling computer in a multiple part system.
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A basket used to hold earth, woven of willow; used in the building of defensive earthworks. See gabion.
Activity of the hydrogen ion in solution. Related to hydrogen ion concentration (CH+) by the activity coefficient for hydrogen (f H+).
The difference in output when the measurand value is first approached with increasing and then with decreasing values. Expressed in percent of full scale during any one calibration cycle. See also Deadband.
When an electrode system is returned to a solution, equilibrium is usually not immediate. This phenomenon is often observed in electrodes that have been exposed to the other influences such as temperature, light, or polarization.
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