Find more facts and information on our topic page about
dispersion
dispersal
dispersal The tendency of an organism to move away, either from its birth site (natal dispersal) or breeding site (breeding dispersal): the opposite of
philopatry. Rates of regional dispersal depend on the interaction of several factors, notably the size and shape of the source area, the dispersal ability of the organisms, and the influence of such other environmental factors as winds or ocean currents. Dispersal may be passive (e.g. of winged seeds or ballooning spiderlings), active (e.g. of many mammals), passive but involving an active agent (e.g. seeds carried on the coats of mammals), or
clonal; in practice these categories are difficult to define precisely. Mathematical modelling using these factors has practical applications in the design of nature reserves, and provides an insight into the present distribution of organisms.
Cite this article
Pick a style below, and copy the text for your bibliography.
|
Dispersion management is vital for high-speed systems.
Magazine article from: Laser Focus World; 7/1/2001; ; 700+ words
; ...both chromatic and polorization-mode dispersion is critical to ensure quality performance...s networks Pulse spreading caused by dispersion is the prime limit on fiber bandwidth, so dispersion compensation offers an obvious way to...
|
|
|
Dispersion limits fiber-transmission bandwidth.
Magazine article from: Laser Focus World; 2/1/2000; ; 700+ words
; ...must account for these variations. Dispersion within an optical fiber is the primary...reduces the signal-to-noise ratio. Dispersion occurs because the speed of light through...distance. There are four major types of dispersion: modal dispersion arising from fiber...
|
|
Dispersions: Flush vs. Dry Pigment.
Magazine article from: Ink World; 11/1/2000; ; 700+ words
; ...prominent dispersion processes...dry pigment dispersions. These processes...Dry Pigment Dispersions Able to yield...water-based dispersion of between...choosing a dispersion process is...to pigment dispersions for offset...
|
|
Dispersions improve consistency, mixing cycles: Part 2 of 2.
Magazine article from: Rubber & Plastics News; 1/23/2006; ; 700+ words
; ...form metal oxide dispersions as mixing aids...paste is the wax dispersion. A typical binder...paraffin wax dispersions is shown in Fig...this case, the dispersion also may contain...dilaurate. Powder dispersions Some of the most...
|
|
Dispersion compensation markets: paths to opportunity.(ANALYST CORNER)
Magazine article from: Lightwave; 11/1/2007; ; 700+ words
; ...significant new revenues will be generated for dispersion compensation by the next wave of optical...trends promoting demand for sophisticated dispersion compensation technology. In a recently...are four paths to opportunity in the dispersion compensation business. At the same...
|
|
Dispersion of categorical variables and penalty functions: derivation, estimation, and comparability.
Magazine article from: Journal of the American Statistical Association; 12/1/1995; ; 700+ words
; Measures of dispersion for categorical random variables based...systematic and rigorous construction of dispersion measures based on penalty functions...ensure a meaningful comparability of dispersion measures based on penalty functions...
|
|
Aqueous dispersions for ultraviolet light curable coatings.
Magazine article from: The Journal of Coatings Technology; 11/1/1996; ; 700+ words
; ...the resulting dispersions were about 65% solids. Dispersion viscosity was...here that all dispersions evaluated to date...behavior. The dispersion viscosity decreases...three types of dispersions: dispersion of acrylated urethane...
|
|
|
Dispersion control boosts high-speed transmission.
Magazine article from: Laser Focus World; 7/1/2000; ; 700+ words
; ...index single-mode fiber, it has zero dispersion at 1310 nm, where attenuation typically...2 to 0.3 dB/km at 1550 nm. Its dispersion at 1550 nm is high, however--about...Little can be done to change material dispersion without impairing fiber transmission...
|
|
|
The Dispersion Market.
Magazine article from: Ink World; 11/1/1999; ; 700+ words
; ...suspension. If the dispersion is stable...separated." "Dispersions, in their...transparency. A good dispersion must also...well." "Dispersions are stable...water-based dispersions. Providing Value A good dispersion can do more...
|
|
|
Dispersion compensators move onto optical-network fast track.
Magazine article from: Laser Focus World; 8/1/2000; ; 700+ words
; MAJOR DRIVERS OF THE DISPERSION COMPENSATOR MARKET INCLUDE INCREASED...wavelengths, carders also need to handle dispersion problems. And this is happening...long-haul networks, is chromatic dispersion, which is both data-rate and wavelength...
|
|
diffusion and dispersion in groundwater flow
Book article from: The Oxford Companion to the Earth
diffusion and dispersion in groundwater flow Dissolved constituents, or solutes...groundwater flow. The general process of spreading is known as dispersion. While dispersion reduces contaminant concentrations in the aquifer, a potentially...
|
|
dispersion
Book article from: A Dictionary of Earth Sciences
dispersion 1. The spreading of a body of water as it flows. Lateral dispersion is the widening of the path taken by ground...granular nature of the rock matrix. Longitudinal dispersion is the spreading out of a body of water along...
|
|
velocity dispersion
Book article from: A Dictionary of Astronomy
velocity dispersion The spread of velocities of stars or...of selected members, the velocity dispersion of the cluster can be estimated, and...from the virial theorem . The velocity dispersion of individual stars in a star cluster...
|
|
|
dispersion measure
Book article from: A Dictionary of Astronomy
dispersion measure A measure of the amount of dispersion suffered by radio waves from an astronomical object...conventionally measured in parsecs per cubic centimetre. Dispersion measure is readily obtained from accurate timing of pulsars...
|
|
dispersion coefficient
Book article from: A Dictionary of Plant Sciences
dispersion coefficient The measure of the spread of data about the mean value, or with reference to some other theoretically important threshold or spatial location, e.g. the standard deviation. See also DISPERSION ; UNDERDISPERSION ; and OVERDISPERSION .
|
