critical density


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critical density

n
(Astronomy) the density of matter that would be required to halt the expansion of the universe
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

critical density

The amount of matter and energy in the universe which if exceeded will delay and even reverse the universe’s expansion.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited
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References in periodicals archive ?
5 it follows that the experimental value of the critical density amplitude [[delta].sub.CCi] of the specified current pulse [i.sub.p](t) is numerically equal in module to [[delta].sub.CCi] [approximately equal to] [I.sub.mp]/([S.sub.C1] + [S.sub.C2]) [approximately equal to] 64.8 kA/[mm.sup.2].
It's like critical density," said Jeff Baker of Fort Collins, Colorado.
denotes the critical density. As we see [[rho].sub.DE] in Holographic DE model (7) is larger than observed; in fact it even exceeds [[rho].sub.c].
Then in order to find new correlations we shall rely on a) the geometry of existing EFE solutions, and b) one coincidence which is critical density.
This star appropriates matter from its companion, eventually accumulating too much matter, with its core reaching a critical density of two billion grams per cubic centimeter, at which point an uncontrolled fusion of carbon and oxygen causes the star to explode.
The critical density for accidents involving trampling is approximately 5 occs/[m.sup.2] [20].
In the control of traffic flow, for example, for the flow through a tunnel, it is desirable to have free-flow traffic in the tunnel where the density remains below a certain critical density that corresponds to maximal throughput in the system.
Thus, the critical density of microvilli per unit area is given by
In order to address this problem and get the tighter bonds of critical density, we put the exposure-path problem into a 3D uniform lattice and propose a bond percolation-based scheme to calculate the tighter bounds of critical density.
One can observe that the network speed is greatly influenced by the randomization probability when the network density is lower than a critical density. However, the influence will be weak when the network density exceeds the critical density.

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