dispersion

Definitions

  • WordNet 3.6
    • n dispersion the act of dispersing or diffusing something "the dispersion of the troops","the diffusion of knowledge"
    • n dispersion the spatial or geographic property of being scattered about over a range, area, or volume "worldwide in distribution","the distribution of nerve fibers","in complementary distribution"
    • n dispersion spreading widely or driving off
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Webster's Revised Unabridged Dictionary
  • Interesting fact: Chameleons change their color by dispersing the concentration of pigment in their skin. This is controlled by the autonomic nervous system. Color changes are determined by external factors such as light and temperature as well as emotions. They do not change color to match their background.
    • Dispersion The act or process of scattering or dispersing, or the state of being scattered or separated; as, the Jews in their dispersion retained their rites and ceremonies; a great dispersion of the human family took place at the building of Babel. "The days of your slaughter and of your dispersions are accomplished."
    • Dispersion (Opt) The separation of light into its different colored rays, arising from their different refrangibilities.
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Century Dictionary and Cyclopedia
  • Interesting fact: Even when all the molecules in a single breath of air have been dispersed evenly in the earth's atmosphere, there will still be one or two of the same ones taken into the lungs with every subsequent breath. Every time you breathe in, you inhale one or two of the same molecules that you inhaled with the first breath you took as a baby.
    • n dispersion The act of dispersing or scattering.
    • n dispersion The state of being dispersed or scattered abroad: as, the dispersion of the Jews.
    • n dispersion In optics, the separation of the different colored rays in refraction, arising from their different, wave-lengths. The point of dispersion is the point where refracted rays begin to diverge. When a ray of sunlight is made to pass through prisms of different substances, but of such angles as to produce the same mean deviation of the ray, it is found that the spectra formed are of different lengths. Thus, the spectrum formed by a prism of oil of cassia is found to be two or three times longer than one formed by a glass prism; the oil of cassia is therefore said to disperse the rays of light more than the glass, or to have a greater dispersive power. It is also found that in spectra formed by prisms of different substances the colored spaces have to one another ratios differing from the ratios of the lengths of the spectra which they compose; and this property has been called the irrationality of dispersion or of the colored spaces in the spectrum. See prism and refraction.
    • n dispersion In medicine and surgery, the scattering or removal of inflammation from a part and the restoration of the part to its natural state.
    • n dispersion In mathematics, the excess of the average value of a function at less than an infinitesimal distance from a point over the value at that point, this excess being divided by 1/10 of the square of the limiting infinitesimal distance.
    • n dispersion In physiol, optics, the blurring of the retinal image due to faulty accommodation.
    • n dispersion In botany, the distribution of seeds and of plants by various means, as by the wind, by birds and animals, etc.
    • n dispersion The tendency of material particles or bodies, including conscious individuals, to go apart, as from a center; hence, in the phenomena of population, the continual breaking down and dispersing of aggregations, counteracting a tendency toward concentration. See law of *aggregation.
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Chambers's Twentieth Century Dictionary
    • n Dispersion dis-pėr′shun a scattering, or state of being scattered: :
    • n Dispersion dis-pėr′shun (med.) the removal of inflammation
    • n Dispersion dis-pėr′shun (opt.) the separation of light into its different rays: the Diaspora (q.v.).
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Quotations

  • William Shakespeare
    William%20Shakespeare
    “Glory is like a circle in the water, which never ceaseth to enlarge itself, till, by broad spreading, it disperse to naught.”
  • R. Buckminster Fuller
    R.%20Buckminster%20Fuller
    “Pollution is nothing but the resources we are not harvesting. We allow them to disperse because we've been ignorant of their value.”

Etymology

Webster's Revised Unabridged Dictionary
CF. F. dispersion,

Usage

In literature:

The force of the charge was irresistible, and the Roundheads, dispersed and on foot, were cut down in all directions.
"Friends, though divided" by G. A. Henty
He had dispersed over the territory of the Empire the majority of the prisoners he had taken.
"A Popular History of France From The Earliest Times Volume I. of VI." by Francois Pierre Guillaume Guizot
On the 10th of August, 1304, the Flemish fleet which was defending the place was beaten and dispersed.
"A Popular History of France From The Earliest Times Volume II. of VI." by Francois Pierre Guillaume Guizot
It was now nearly dark, and the crowd, having satisfied its idle curiosity, began slowly to disperse.
"The Wing-and-Wing" by J. Fenimore Cooper
I cannot imagine, that a Man who disperses a Libel is less desirous of doing Mischief than the Author himself.
"The Spectator, Volumes 1, 2 and 3" by Joseph Addison and Richard Steele
The Home Guards were in possession, and the Secessionists had dispersed.
"Camp-Fire and Cotton-Field" by Thomas W. Knox
A boat's crew on landing surprised a small party, which instantly dispersed in various directions.
"Discoveries in Australia, Volume 1." by J Lort Stokes
Here they were permitted to collect or disperse at will.
"The Nest of the Sparrowhawk" by Baroness Orczy
The Puebla garrison beat back every attack; and the bands of irregular horse men were easily dispersed.
"Stonewall Jackson And The American Civil War" by G. F. R. Henderson
These volumes were soon dispersed.
"Account of a Tour in Normandy, Vol. II. (of 2)" by Dawson Turner
However, after being dispersed, and a great part of the ships having lost their rigging, they escaped on shore.
"History of Rome, Vol III" by Titus Livius
There are laws which disperse.
"The Man Who Laughs" by Victor Hugo
It was sufficient, however, to leave some respect for the royal person, and make the crowd disperse.
"On the Face of the Waters" by Flora Annie Steel
The latter is produced through the dispersion of light by spherical raindrops.
"Physics" by Willis Eugene Tower
This, however, was not soon to be done; the dispersion from the meadow having been made in every possible direction.
"Camilla" by Fanny Burney
The great library of Richard Mead, M.D., was dispersed by Samuel Baker in November and December 1754 and in April and May 1755.
"Prices of Books" by Henry B. Wheatley
Then the door being thrown open they gradually dispersed to their several homes.
"Ponce de Leon" by William Pilling
Turn it frequently up or down, that the juices of the fish may be equally dispersed throughout.
"Miss Leslie's New Cookery Book" by Eliza Leslie
And destruction and dispersion followed as naturally as any profane effect follows any vulgar cause.
"The Trial of Jesus from a Lawyer's Standpoint, Vol. II (of II)" by Walter M. Chandler
Through them the experience of the dispersion was brought to bear upon the Palestinian Jews.
"Encyclopaedia Britannica, 11th Edition, Volume 15, Slice 4" by Various
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In poetry:

Not blither is the mountain roe,
With many a wanton stroke
Her feet disperse, the powd'ry snow
That rises up like smoke.
"Lucy Gray [or Solitude]" by William Wordsworth
Years passed. The raging, gusty storms
Dispersed my former reveries,
And I forgot your tender voice,
Your features so divine.
"To... (Kern)" by Alexander Sergeyevich Pushkin
Now the grave gives up its prey,
Friends arise, but swift away;
Dreams disperse, delusions fly,
And shew of sleep the mockery.
"Queen Mab And Her Fats" by Charlotte Dacre
Surely if each one saw another's heart,
There would be no commerce,
No sale or bargain pass: all would disperse,
And live apart.
"Giddinesse" by George Herbert
Why then should Man immortal be?
He is but fleeting form, to fade,
Like momentary cloud, or sea
Of waves dispersed as soon as made.
"The Door Of Humility" by Alfred Austin
The clouds are burst, the shades dispersed;
Descending from above
With wounded hands our Prophet stands,
And bears the Law of Love.
"The Eternal Calvary" by Digby Mackworth Dolben

In news:

Overbrook Farm to Disperse Stock.
Iranian pro-government Basij militia members dispersed crowds of protesters here Thursday -- sometimes with force -- witnesses said.
JERUSALEM — Israeli police have stormed a holy site in Jerusalem's Old City, dispersing dozens of Palestinians who police say lobbed rocks at officers.
My co-worker wants to know about thermal dispersion units and how he can use it there to separate stickies from wood.
Powder Induction & Dispersion System.
Water-based, High-UVA Titanium Dioxide Dispersion for Natural UV Protection and Added Formulation Benefits.
Water-based, High-UVA Titanium Dioxide Dispersion for Natural UV Protection and Added Formulation Benefits CosmeticsAndToiletries.com.
New & Used High Speed Dispersion Blades.
Longer times do not usually result in better dispersions .
Have been followed, most dispersions are completed within 20-30 minutes after the last of the powders have been properly added.
In some cases, they can be detrimental because of the higher batch temperatures generated by the high-shear disperser blade.
The inline, skid-mounted system feeds powders and disperses them instantly.
Claims against dispersant maker tossed.
Captains disperse guerrilla camp on Boone-Howard line.
Thousands of people showed up for a DJ's performance at a Santa Monica Airport hangar where a maximum of 1,500 had been expected, prompting officers to disperse would-be attendees who had lined up with tickets in hand, police said.
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In science:

The ma jor difference between our results and those of G09 is that we find metallicity to be dependent on radius and velocity dispersion, while G09 found metallicity to be dependent on velocity dispersion alone.
The Effect of Major Mergers on Age and Metallicity Across the Fundamental Plane
While [Mg/H] depends strongly on velocity dispersion in G09, in the SAMs metallicity depends on both velocity dispersion and effective radius.
The Effect of Major Mergers on Age and Metallicity Across the Fundamental Plane
However, the Gaussian model is only applicable to rather small values of dispersions σ (in comparison to the average domain size lm ) because for dispersions comparable or bigger than lm it results in negative values of domain width.
Parametric wave interaction in quadratic crystal with randomized distribution of ferroelectric domains
Fig. 10 (color online) Comparison of TH generation via coherent process according to Eq. (22) (gray lines) and incoherent Eq. (24) (red lines) for a) small dispersion σ=0.05 µm and b) large dispersion σ=10 µm.
Parametric wave interaction in quadratic crystal with randomized distribution of ferroelectric domains
The line dispersions were dictated by our use of the HARPS instrument, which has a spectral resolution of R = 115000, implying an instrumental Gaussian dispersion of 2.61 km s−1 .
Rossiter-McLaughlin Effect Measurements for WASP-16, WASP-25 and WASP-31
Moreover, even if the dispersion in the ∆λ(T ) values measured in remains reasonable (∼ 30 − 50 nm), the authors are completely ignoring the large dispersion in the values previously published (including their own data which differ by a factor ∼ 3) stating that the values obtained in are ”similar to other reports”.
Comment on "Precision global measurements of London penetration depth in FeTe$_{0.58}$Se$_{0.42}$"
Our theoretical investigation has revealed that smoothing is performed asymmetrically for GPV, and this is illustrated in Fig. 17, where we see horizontal dispersion but no vertical dispersion especially visible in the upper left corner.
Locally Orderless Registration
In particular, we calculate the ratio of the maximum velocity across the source to average velocity dispersion, which provides an indicator of the extent to which a system is rotation or dispersion dominated, Vobs/2σ .
Integral Field Spectroscopy of 2.0
We note that the integrated velocity dispersions will be larger than the average dispersions measured in the maps (Figs. 3 and 4) since the integrated values contain a non-negligible contribution from the range of velocities within the sources.
Integral Field Spectroscopy of 2.0
We compare the average velocity dispersion in the maps to the integrated value finding that, on average, the integrate d values are ∼20% larger than the average in the dispersion maps.
Integral Field Spectroscopy of 2.0
Vobs /2σ is ratio of half the observed velocity gradient to the integrated velocity dispersion and provides a measure of how rotation or dispersion dominated a system is.
Integral Field Spectroscopy of 2.0
ETGs with high velocity dispersion are generally found to exhibit older ages and higher metallicities than their low velocity dispersion counterparts (Trager et al. 2000; S´anchez-Bl´azquez et al. 2006), resulting in redder colours.
MIUSCAT: extended MILES spectral coverage. II. Constraints from optical photometry
Simulations that include fluctuations from photon statistics, but no intrinsic-scatter model, underestimate the measured dispersion in these variables. A viable model of intrinsic scatter must predict the dispersion for each variable and for multiple data sets.
Testing Models of Intrinsic Brightness Variations in Type Ia Supernovae, and their Impact on Measuring Cosmological Parameters
The dispersion on c − c′ is ∼ 0.001, more than an order of magnitude smaller than the dispersion on B − V − c′ , and thus this correction has little effect.
Testing Models of Intrinsic Brightness Variations in Type Ia Supernovae, and their Impact on Measuring Cosmological Parameters
Statistics Summary After applying the selection requirements in Section 2, along with the light curve fitting requirements for each dispersion variable, the number of SNe Ia for each sample and for each dispersion variable is shown in Table 5 The smaller photo-z samples arise from a light curve fitting requirement.
Testing Models of Intrinsic Brightness Variations in Type Ia Supernovae, and their Impact on Measuring Cosmological Parameters
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