Effective Length

effective length

[ə¦fek·tiv ′leŋkth]
(naval architecture)
Mean length of that portion of the ship's hull below the waterline.

Effective Length

 

(of an antenna), a parameter of wire antennas that characterizes the antenna’s efficiency in transmitting and receiving electromagnetic waves. The effective length for a receiving antenna is defined as the ratio of the electromotive force at the receiver input to the intensity of the electric field incident on the antenna; for a transmitting antenna, it is defined as the length in free space of a conductor with a uniform and inphase current distribution along its entire length that generates the same field intensity in the direction of maximum radiation as a real antenna under conditions of equal current amplitudes in the conductor and the real antenna. The effective antenna length is numerically identical in transmission and reception.

effective length

Of a column, the distance between inflection points in the column when it bends.
References in periodicals archive ?
Altered tee boxes have added real or effective length as well as trouble on the fifth, eighth, ninth, 12th and 13th par-4 holes at Riviera, No.
The batsmen will know how the ball comes on to the bat and the bowlers will have learnt from their battering at the hands of Trescothick and Stewart and know the most effective length to employ.
The further forward the dimple on the elevated soft palate is, the less the effective length of the velum is.
However, the screw's back and forth motion constantly changes its effective length and therefore compromises its ability to homogenize plastic each time the screw is stroked.
CEP-coated fused-silica capillaries provided with the pGEM Double Stranded DNA Analysis Kit (HewlettPackard) of 56 cm effective length and 64.
Although in principle firms plan over an infinite future, the effective length of the planning period is determined by the extent of the frictions associated with the firm's actions.
Clearly, the optimally effective length of drug treatment--longer than 90 days--appears to conflict with the goal of reducing prison crowding.
Coating the dipoles made their effective length longer and lowered the reflection center frequency.
A further development in 1996, the 3M Cold Shrink Termination QT-III, eliminated the need for grease, reduced the effective length of the termination and increased arc and track resistance.
The effective length is the distance from a thermal anomaly where heat flow is affected by the thermal bridge.
5) determines the effective length of main constructive elements, respectively the filament of WTh and central core of Mo, assuring a correct behavior of weld joints during of magnetrons working.

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