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ecological efficiency ecological efficiency
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Efficiency Efficiency
EFFICIENCY Efficiency, or allocative efficiency, is a central concept of economic theory. If one plan produced a product with fewer resources than another plan, it is said to be more efficient. A system that produces maximum output from minimum input of resources is efficient. Resources,... Read more
precipitation-efficiency index precipitation-efficiency index
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action spectrum action spectrum
action spectrum A graphical plot of the efficiency of electromagnetic radiation in producing a photochemical reaction against the wavelength of the radiation used. For example, the action spectrum for photosynthesis using light shows a peak in the region 670–700 nm. This corresponds to... Read more
nuclear reactor nuclear reactor
nuclear reactor device for producing controlled release of nuclear energy . Reactors can be used for research or for power production. A research reactor is designed to produce various beams of radiation for experimental application; the heat produced is a waste product and is dissipated as... Read more
Decentralization Decentralization
Decentralization BIBLIOGRAPHY Decentralization is the transfer or sharing of decision-making power from a central authority toward lower-level units or the end users. Decentralization signifies the disbursement of power from the top down within any type of organizational hierarchy, such as... Read more
William Froude William Froude
William Froude frood , 1810-79, English engineer and naval architect, brother of J. Anthony Froude ; educated at Oxford. In 1837 he worked on the Bristol and Exeter railroad, constructing the line from the Whitehall tunnel to Exeter. He studied the motion of a ship among waves, demonstrating that... Read more
steering gear steering gear
steering gear. In order to turn a rudder a force is applied to a tiller. As ships became larger the rudders also increased in size and the manpower necessary to turn the rudder increased. Brunel's large steamship Great Eastern was the first ship fitted with a powered steering gear; this was a steam... Read more
International Maritime Organization International Maritime Organization
International Maritime Organization (IMO), specialized agency of the United Nations established in 1948, with headquarters in London and 167 member nations. IMO is one of the smallest of the UN agencies. Originally called the Inter-Governmental Maritime Consultative Organization, it was renamed a... Read more
magnetron magnetron
magnetron , vacuum tube oscillator (see electron tube ) that generates high-power electromagnetic signals in the microwave frequency range. Its operation is based on the combined action of a magnetic field applied externally and the electric field between its electrodes. The tube is a diode ... Read more

Related newspaper, magazine, and trade journal articles from HighBeam Research

Discover Magazine cites '87's top science stories.
PR Newswire ...superconductors power line could...near perfect efficiency. Some superconductors...birth of a neutron star. In February...supergiant star was witnessed...birth of a neutron star, an object...parasites. ...
Chandra's 'Beautiful' View; Telescope's First Images: Supernova, Possible...
Newspaper article from: The Washington Post ...increase the efficiency of the $1...dispatched their observatory...a collapsed star." The site...black hole or a neutron star--the remnant of the star, some 10 to...the cores of stars. Then, by...years with ...
If Earth were powered from space
Newspaper article from: International Herald Tribune ...and it could power the Earth for...systems, and neutron stars, in which the...emissions and their movement, which...dioxide, and their variations over...Space monitoring shows where trace elements...energy, energy ...

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