The design of combustion furnaces for a given performance and thermal efficiency, involving study of the heat liberated in the combustion process, the amount of heat absorbed by heat elements, and heat-transfer rates.

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A rudder design where the pivot point and the center of its area meet, reducing the effort needed to turn it.

It has about 20% of the rudder area forward of the rudder axis.


A design technique used in linear control theory in which many or all of a system's closed-loop poles are positioned as required, by proper choice of a linear state feedback law; if the system is controllable, all of the closed-loop poles can be arbitrarily positioned by this technique.


Small-scale chemical reaction used to test operating conditions and product yields; used as a pilot for design of large-scale reaction systems.


In a spin-stabilized projectile, the overstability that results when the rate of spin is too great for the particular design of projectile, so that its nose does not turn downward as it passes the summit of the trajectory and follows the descending branch. Also known as overstabilization.


An analysis of all procedures concerned with the design or improvement of production, the purpose of the operation, inspection standards, materials used and the manner of handling them, the setup, tool equipment, and working conditions and methods.


Use of the functional principles of biological nervous systems to inspire the design and fabrication of artificial nervous systems, such as vision chips fluid-content properties down a wellhole by neutron bombardment and detection of resultant radiation (neutrons or gamma rays). Also known as neutron logging.


1. A packaged assembly of wired components, built in a standardized size and having standardized plug-in or solderable terminations. 2. A unit of size used as a basic component for standardizing the design and construction of buildings, building parts, and furniture.


A collection of items not all having the same basic name which are employed individually or conjunctively to alter the design of a component or equipment.


A major or minor change in the design of an item, effected in order to correct a deficiency, to facilitate production, or to improve operational effectiveness.


Science, art, and practice involved in design and construction of defensive and offensive military works as well as construction and maintenance of transportation systems.

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