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 ?
Pantami told the Nigerian Postal Service (NIPOST), to ensure an appreciable improvement in the efficiency of its letter and parcel delivery service, and to increase the effective area of its coverage in the country.
The effective area bt i-iii is 6 000 m 2 , Gross floor area bt i-iii approx.
The total effective area of the entity is 323.2 square meters.
The objective of this study was to examine the relationship between SSB and recruitment to determine the following: (1) whether a quantitative relationship between SSB and recruitment can be identified using 30+ years of comprehensive survey data, (2) whether the relationship between SSB and recruitment has changed over the past 30+ years during a period of climate change by incorporating larval dispersal model projections, and (3) if the effective area of recruits is consistent with the adult distribution.
The ultra-low loss, silica-core fibre with large effective area, is ITU-T G.654.E compliant, highlighting the industry's recognition of the value that large effective-area fibre can bring to the terrestrial market.
Here, the fiber length and core effective area are investigated in terms of their effects on FWM power.
Stoptix Bicycle Brake Lights have a uniformly illuminated octagon-shaped face with a larger effective area than most bike lights.
The main two subjects discussed in this paper are the cyclic prefix and the effective area, these two parameters are presented below.
The review is in line with the objective of AAA president Dahlan Al Hamad of Qatar to make athletics the competitive and recreation sport of choice in the Asian Continent and the AAA as the most professionally run and effective area association in the world.
It's not all about size, though: RATAN-600's collecting surface is a ring rather than a dish, so it only has an effective area of 12,000 [m.sup.2].
In Section 3, we describe a method to calculate the HAWC effective area based on purely geometrical considerations and evaluate it for different trigger conditions.
As shown in Figure 1, 1Krepresents the stiffness of the air spring; the additional 2K represents the stiffness of the air chamber; 3Krepresents the effective area change rate stiffness; 4Krepresents the vertical angle of series connection rubber pile; 2d represents orifice or equivalent damping of connecting pipe; 3drepresents the rubber damping of air spring; 4drepresents the vertical damping of the series connection rubber pile; 0z represents the total deformation of the air spring;

Full browser ?