effective area

effective area

(of a radio telescope) see array.

effective area

[ə¦fek·tiv ′er·ē·ə]
(chemical engineering)
Absolute or cross-sectional area of process media involved in the process, such as the actual area of filter media through which a fluid passes, or the available surface area of absorbent contacted by a gas or liquid.
(electromagnetism)
Of an antenna in any specified direction, the square of the wavelength multiplied by the power gain (or directive gain) in that direction and divided by 4π (12.57).

effective area

The net area of an air outlet or air inlet through which air can pass; it is equal to the free area of the device times the coefficient of discharge.
References in periodicals archive ?
In general, the rule of thumb makes for an effective area for support of the screw in the barrel, a mechanically rugged flight, and sufficient pressure drop between channels to minimize backflow of melt as pressure develops.
03MP is used to expand the sensor effective area for boostA[degrees] ing the sensitivity by approximatA[degrees] ely 1.
The research work calculates the effective area of interaction for each of the elementary dissipative processes.
The NuStar has a mirror with an effective area of 300 square centimeters, but scientists would need a mirror with an effective area of about a meter squared to see the cosmic rays from galaxy clusters.
Scotland had the fewest business owners satisfied with their location but 65% still believed they were in an effective area.
The tabs are also thinner, a mere 35mm thick, so the effective area is enlarged to capture more sunlight, thus improving efficiency.
The researchers believe that nanometric size of the powders provides more effective area, and it increases the release of calcium ion from silicate calcium cement.
To rectify this, two sub-productive area floods were simulated as effective area (86/10 kilometers) that is very close to the measured runoff model results.
28, 2015 /PRNewswire/ -- ECOC 2015 -- OFS, a leading designer, manufacturer and supplier of innovative fiber optic network products is expanding its terrestrial long haul product line with the addition of TeraWave(TM) Ultra Low Loss (ULL) fiber, with 50% greater effective area than G.
A statement by the Command of Operations said today that the security forces in Anbar Operations continues to cleanse Anbar province of terrorist gangs, and the security forces carried out effective in Albu Aitha area resulted in the destruction of a vehicle carrying terrorist elements, also carried out other effective area (Albu Aitha bridge) resulted in the killing 6 terrorists and destroying a cache of terrorist groups, and our security forces managed to burn an excavators and a cache, and burned a site belonging to Daash gangs ".
Fire damper with two parallelly moving blades (each having effective area S2 = 2L x L, stroke 2L) is shown on Fig.
Results of the research showed that the modified electrode had specific properties such as high effective area and reduction in the over-voltage value.