porosity

Definitions

  • WordNet 3.6
    • n porosity the property of being porous; being able to absorb fluids
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Webster's Revised Unabridged Dictionary
    • n Porosity The quality or state of being porous; -- opposed to density.
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Century Dictionary and Cyclopedia
    • n porosity The state or quality of being porose, porous, or pervious; perforation.
    • n porosity A pore or perforation.
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Chambers's Twentieth Century Dictionary
    • ns Porosity quality of being porous—opp. to Density
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Etymology

Webster's Revised Unabridged Dictionary
Cf. F. porosité,
Chambers's Twentieth Century Dictionary
Fr.,—L. porus—Gr. poros, a passage.

Usage

In literature:

Silk ranks next to wool in warmth and porosity.
"A Practical Physiology" by Albert F. Blaisdell
Old soil clinging to plants interferes with the new root growth while the green affects the porosity of the pot.
"The Library of Work and Play: Gardening and Farming." by Ellen Eddy Shaw
By physical character is meant the porosity which results from breaking up the soil.
"Studies of Trees" by Jacob Joshua Levison
Its porosity and smooth-cutting properties render it of great value to painters and polishers for levelling down first coatings.
"French Polishing and Enamelling" by Richard Bitmead
It increases the porosity of soils and permits roots to go deeper into the soil for food and moisture.
"Agriculture for Beginners" by Charles William Burkett
These characters are dependent principally, though not entirely, on the porosity of the soil.
"Elements of Agricultural Chemistry" by Thomas Anderson
In drying it shrinks, loses its porosity and requires long soaking to saturate it again.
"Peat and its Uses as Fertilizer and Fuel" by Samuel William Johnson
The porosity varies between 5 and 50 per cent.
"The Economic Aspect of Geology" by C. K. Leith
Entire fructification confluent forming a mucilaginous mass, porose.
"The North American Slime-Moulds" by Thomas H. (Thomas Huston) MacBride
The extreme porosity of the soil probably also accounts for the length of time it will go on bearing crops without becoming exhausted.
"Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 2" by Various
Care must be taken that no crystals appear, which would injure the porosity of the paper.
"Paper and Printing Recipes" by J. Sawtelle Ford
He let her use the most costly of the fine-porosity filters.
"Mate in Two Moves" by Winston Marks
They might note the absence of skin porosity.
"The Plotters" by Alexander Blade
This membrane possesses a certain degree of porosity, which is probably increased by dilatation.
"On Snake-Poison: its Action and its Antidote" by A. Mueller
This porosity is really desirable.
"Camp and Trail" by Stewart Edward White
They make the visible porosity of such kinds of wood.
"The Elements of Botany" by Asa Gray
Owing to the porosity of the earthenware the liquid was remarkably cool.
"Rounding up the Raider" by Percy F. Westerman
Added to some clays to increase refractories or porosity.
"Pottery, for Artists Craftsmen & Teachers" by George J. Cox
The porosity of some of the rocks can here be readily distinguished.
"The Jenolan Caves" by Samuel Cook
Resistance to change of extensity: compressibility, porosity, adhesion, cohesion.
"The School System of Norway" by David Allen Anderson
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In news:

Lovers, strangers, family members, everyone who crosses the life of artist Sophie Calle is implicated in her multi-media tests of the porosity of intimacy and public space—famously without their knowledge or against their will.
Hot isostatic pressing (HIPing) has long been used to eliminate porosity in castings and to form high-strength powder metal parts.
Revision of D6583 - 04(2010) Standard Test Method for Porosity of Paint Film by Mineral Oil Absorption.
WK32376 Standard Test Method for Porosity of Paint Film by Mineral Oil Absorption.
Add informational appendix explaining the deriviation of Porosity equations.
Reader Q&A: CurlyNikki Explains Hair Porosity .
The PERFORMA™ P's high-output performance and unique compression technology features process capabilities such as full dwell time control and equal porosity tabletting.
Its coverage varies depending on the surface color and porosity.
The paper 's porosity is the cause of the high off current, Loo says, because it creates paths for current to seep through.
With that said, tools in PathFinder 's Survivor series, one of the its newer tool suites, are rated to 25,000 psi and 350ºF, and consist of MWD directional survey, annular pressure, resistivity and nuclear porosity services.
A log-log plot of resistivity (x-axis) vs porosity.
carbon block for high porosity and low pressure drop.
The concept of porosity has been a favorite point of exploration in the buildings of Steven Holl Architects, so applying that concept at the scale of furniture seems like a natural progression for the firm.
For example, porosity is evident on the cut edge.
Non intergranular porosity such as fractures, vugs, etc.
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In science:

We have proceeded to the determination of the fundamental parameters of GRB 090618 in the fireshell model, including the identification of the P-GRB, the dyadosphere energy, the baryon loading, the density and porosity of the CBM.
Fundamental physics from black holes, neutron stars and gamma-ray bursts
An additional condition for failure is when the porosity of a particle increases beyond a critical limit. A final condition for failure is when a bifurcation condition such as the Drucker stability postulate is satisfied.
Validation of the material point method and plasticity with Taylor impact tests
Accordingly, two yield criteria have been explored - the von Mises condition and the Gurson-Tvergaard-Needleman (GTN) yield condition [25, 26] which depends on porosity.
Validation of the material point method and plasticity with Taylor impact tests
The evolution of porosity is calculated as the sum of the rate of growth and the rate of nucleation .
Validation of the material point method and plasticity with Taylor impact tests
The same sort of calculation can be made for the previously mentioned porosity modulated winds.
Do novae have optically thick winds during outburst with large deviations from spherical symmetry?
Clarke & Oey (2002) argued that there is a critical star formation rate above which the porosity of the ISM is approximately unity. A highly porous ISM is expected to result in a high escape fraction (Fujita et al. 2003).
Runaway Stars and the Escape of Ionizing Radiation from High-Redshift Galaxies
Finally, we explain how porosity is estimated for a given set of experimental points.
Porosities and dimensions of measures satisfying the doubling condition
The two porosities we consider satisfy clearly por(spt(µ)) ≤ por(µ).
Porosities and dimensions of measures satisfying the doubling condition
In other words the porosity of a measure is larger than that of the support of the measure, precisely because the former neglects occasional dust.
Porosities and dimensions of measures satisfying the doubling condition
Example 2 We next want to argue that voids are accounted for in a more reasonable way in the measure theoretic definition of porosity.
Porosities and dimensions of measures satisfying the doubling condition
The conventional porosity asks for the largest ball in B (x, r) which does not contain any point of the set in question; see also below.
Porosities and dimensions of measures satisfying the doubling condition
We next set Cx = {y : y = x + z , z ∈ C }, in other has voids and its porosity equals in fact 1 words, Cx is the translate of C by x.
Porosities and dimensions of measures satisfying the doubling condition
The example we have just given does not work in the case of porosity of measures and this is one of the reasons why the porosity of measures is a more useful concept than that of sets.
Porosities and dimensions of measures satisfying the doubling condition
But the porosity por(ν ), as defined in Eq.(2), is strictly positive.
Porosities and dimensions of measures satisfying the doubling condition
Therefore, the se t Cxi is not counted in this consideration, and the measure will have the same porosity as C itself.
Porosities and dimensions of measures satisfying the doubling condition
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