# Transmission Factor

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## transmission factor

[tranz′mish·ən ‚fak·tər]
(physics)
The ratio of the flux of some quantity transmitted through a body to the incident flux.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

## Transmission Factor

The transmission factor of a medium τ is the ratio of the radiation flux Φ passing through the medium to the flux Φ0 incident upon the surface of the medium: τ = Φ/Φ0. The concept of a transmission factor is used most frequently with regard to luminous fluxes. The value of the transmission factor of a body depends on the dimensions, shape, and surface condition of the body, as well as on the angle of incidence, spectral composition, and polarization of the incident radiation (seePOLARIZATION OF LIGHT). A distinction is made between transmission factors for direct transmission, in which the medium does not scatter the radiation passing through it; for diffuse transmission, in which the medium diffuses all radiation penetrating it; and for mixed transmission, in which there is partial diffusion. The value of the transmission factor for radiation of only one wavelength (monochromatic light) is called the monochromatic transmission factor. This coefficient is found from measurements of the illumination and the luminance. The determination of the transmission factor is a photometric measurement.

## transmittance

When radiant flux is incident on a medium, the ratio of the flux which emerges from the medium to the flux which is incident upon it.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
Also some simple transformations of the Colebrook equation, such as introduction of the transmission factor in form of the shift x = (1/[square root of ([lambda])]), can reduce the number of required iterations.
Indirect Calculation of A through the Transmission Factor x = (1/[square root of ([lambda])].
Shift in form of the transmission factor x = (1/[square root of ([lambda])] should be introduced in order to transform the Colebrook equation in form f(x, Re, [epsilon]/D) = 0:
In order to increase the maximum flow value to the required value, the above algorithm computes the optimal capacity expansion while assuming deterministic transmission factors. But, in case of randomness the algorithm may be used only for observation values of these factors.
PSEUDOCODE 1 Start Read the nominal capacities, [u.sub.ij] s, and subset of the transmission factors, [a'.sub.ij] s, of the original network, G.
The atmospheric transmission factor at a ground station at time, t, is deduced from the radiation measured at that ground station and cloud cover index of that area obtained from the satellite images of that area for that time.
Model coefficients 'a' and 'b' were determined from the linear regression (Eq.3) between the total atmospheric transmission factor deduced from ground measurements and cloud index derived from satellite data.
Suitable membership functions are acquired for transmission factors through data analysis and simulation experiments, shown in Figure 3.
First, the influences of transmission factors on the transmission ability in theory as well as the feedback from experiments are analyzed.
Overall, from this literature, 15 dengue transmission factors emerged: climate (temperature and rainfall), preadult and adult niche and vector habitat requirements, vector density, public infrastructure, landscape elements, household characteristics, population growth, population movement, public disease prevention and control programs, knowledge and behaviors affecting vector control, community knowledge, attitudes and behaviors related to dengue disease, and social organization.
The review also indicates that there are few studies on the interrelationships between climate and nonclimate transmission factors. Additional research in this area is needed to fully understand the dynamics of dengue transmission.
Table 6 shows transmission factors for configurations similar to the two cases earlier.

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