stratify

Definitions

  • WordNet 3.6
    • v stratify render fertile and preserve by placing between layers of earth or sand "stratify seeds"
    • v stratify form layers or strata "The rock stratifies"
    • v stratify form, arrange, or deposit in layers "The fish are stratified in barrels","The rock was stratified by the force of the water","A statistician stratifies the list of names according to the addresses"
    • v stratify divide society into social classes or castes "Income distribution often stratifies a society"
    • v stratify develop different social levels, classes, or castes "Society stratifies when the income gap widens"
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Webster's Revised Unabridged Dictionary
    • v. t Stratify To form or deposit in strata, or layers, as substances in the earth; to arrange in strata.
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Century Dictionary and Cyclopedia
    • stratify To form into a layer or layers, as substances in the earth; lay or arrange in strata.
    • stratify To preserve (tree-seeds) by spreading them in layers alternating with layers of earth or sand.
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Chambers's Twentieth Century Dictionary
    • v.t Stratify strat′i-fī to form or lay in strata or layers
    • pr.p Stratify strat′ifying; pa.t. and pa.p. strat′ifīed
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Etymology

Webster's Revised Unabridged Dictionary
Stratum, + -fy,: cf. F. stratifier,

Usage

In literature:

There are signs that their society was stratified.
"A history of China., [3d ed. rev. and enl.]" by Wolfram Eberhard
Undisturbed stratified ashes and roof dust were 30 inches thick above the stone.
"Archeological Investigations" by Gerard Fowke
I think you could probably get some stratified nuts from Carlton Nursery Co., Carlton, Oregon.
"Northern Nut Growers Association Report of the Proceedings at the Twenty-Fourth Annual Meeting" by Northern Nut Growers Association
He then distinguishes between granitic or crystalline mountains, and those composed of stratified rocks and volcanic mountains.
"Lamarck, the Founder of Evolution" by Alpheus Spring Packard
Limestone is the most familiar of these and is a grayish rock usually found in hard stratified masses.
"An Elementary Study of Chemistry" by William McPherson
STRATIFIED ALPS OF SAVOY.
"On the Old Road, Vol. 2 (of 2)" by John Ruskin
A thin stratified layer of epidermis completely closes it.
"Surgical Experiences in South Africa, 1899-1900" by George Henry Makins
He seems to be a queer kind of stratified rock; you never know what you are going to strike next.
"Flint" by Maud Wilder Goodwin
But, further, it is certain that granite, or a species of the same kind of stone, is found stratified.
"The World's Greatest Books - Volume 15 - Science" by Various
Currents of air do not mingle, but stratify.
"The Philosophy of the Weather" by Thomas Belden Butler
In many spots the rocks split into such thin slaty looking tables that they have the appearance of being stratified.
"Narrative of a Second Expedition to the Shores of the Polar Sea" by John Franklin
The fibrous roots, if stratified in sand loam in the autumn, will produce fine plants.
"Ginseng and Other Medicinal Plants" by A. R. (Arthur Robert) Harding
Which kinds of stratified rocks generally have the greatest extension?
"Geology" by James Geikie
The upper twenty feet consisted of loess and the lower forty feet of stratified gravel.
"A Manual of the Antiquity of Man" by J. P. MacLean
EOZO'IC ROCKS, the name given to the pre-Cambrian rocks, from their containing the first or earliest traces of life in the stratified systems.
"The New Gresham Encyclopedia" by Various
In spring the "stratified" nuts are ready for planting.
"Trees Worth Knowing" by Julia Ellen Rogers
A floe berg is a stratified mass of floe ice (i.e., sea-water ice).
"Loss of the Steamship 'Titanic'" by British Government
The Vindhyans are well-stratified beds of sandstone and shale, with some limestones.
"Encyclopaedia Britannica, 11th Edition, Volume 14, Slice 4" by Various
They are stratified, their layers representing in part the successive snowfalls of the interior of the country.
"The Elements of Geology" by William Harmon Norton
The mountains around are nearly all built of horizontal stratified rocks.
"A Summer's Outing" by Carter H. Harrison
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In poetry:

Descended to the shore, odd how we left
the young girl with us to herself, and went
straight to examine the stratified cliffs,
forgot her entirely in our interest.
"Porth Ceiriad Bay" by Ben Jonson

In news:

We further stratified these cohorts into those with and those without antibody to HCV and divided those with antibodies into those with chronic (75%) and those with cleared (25%) infections (8,49).
Since 1999, Justus League alumnus Edgar Allen Floe has carried his baritone through the area's stratified rap scenes relatively quietly.
As an anthropologist I know that humans in social groupings over 12-15 individuals stratify themselves.
To test his theory that the tank was thermally stratified , the operator installed a series of submersible temperature probes at 20-ft intervals inside the tank.
The benefits were immediate—the single active mixer was able to penetrate each thermally stratified water level and completely circulate the entire tank.
However, previous results do not address the important classes of stratified programs and its subclass of acyclic (i.e.
Several methods have been proposed to compile, possibly inconsistent, weighted or stratified bases.
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In science:

Erdmann and C. S´aenz for stratifying systems, mentioned in the introduction of this paper.
On the existence and construction of proper costratifying systems
Then the fol lowing statements, (I) and (II), are equivalent. (I) There exists a family Θ = {Θ(i)}t i=1 in mod(Λ) such that (Θ, Y , ≤) is an Ext-injective stratifying system.
On the existence and construction of proper costratifying systems
If we only assume that condition (a) in (II) holds then condition (b) in the definition of an Ext-injective stratifying system holds, as we prove next.
On the existence and construction of proper costratifying systems
If these conditions hold, the Ext-injective stratifying system (Θ, Y , ≤) is uniquely determined (up to isomorphism) and Θ(i) ≃ G(Γop ∆(i)) for al l i ∈ [1, t].
On the existence and construction of proper costratifying systems
Y , ≤) is an Ext-injective stratifying system.
On the existence and construction of proper costratifying systems
Relation between proper costratifying systems and Ext-injective stratifying systems.
On the existence and construction of proper costratifying systems
Moreover, (Λ∆, {T (i)}n i=1 , ≤) is an Ext-injective stratifying system and (Λ∇, {T (i)}n i=1 , ≤) is a proper costratifying system.
On the existence and construction of proper costratifying systems
Then, the fol lowing conditions are equivalent. (a) There exists a family Θ = {Θ(i)}t i=1 in mod(Λ) such that (Θ, Q, ≤) is an Ext-injective stratifying system.
On the existence and construction of proper costratifying systems
The aim of this subsection is to find, for a given Ext-injective stratifying system (Θ, Q, ≤), necessary and sufficient conditions for the existence of a family Ψ = {Ψ(i)}t i=1 in mod(Λ) such that (Ψ, Q, ≤) is a proper costratifying system.
On the existence and construction of proper costratifying systems
Q, ≤) is an Ext-injective stratifying system.
On the existence and construction of proper costratifying systems
By considering the invertible-map game equivalence ≈k m,Ω on the class of all finite graphs, we get a family of polynomial-time algorithms for stratifying the graph isomorphism relation.
Pebble games with algebraic rules
Hence, it follows that the family of IMk m,Ω algorithms provide a way of stratifying the graph isomorphism relation which goes beyond that given by the Weisfeiler-Lehman algorithms.
Pebble games with algebraic rules
We stratify the above sum with respect to number of βi ’s strictly greater than zero, and set up the inclusion–exclusion as follows.
Random coverings of 1-complexes and the Euler characteristic
From the work of Thom , Fukuda and Nakai , it follows that one cannot stratify arbitrary complex algebraic maps so as to have local topological triviality, such as in the case of Whitney stratified spaces.
Finite sets in fibres of holomorphic maps
Bulatov, V.V. and Vladimirov, Y.V. 1991 Internal gravity waves excited by a source in stratified horizontally inhomogeneous media.
General problems of the internal gravity waves linear theory
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