View source for nildenmi

==== valsi ====
nildenmi
==== type ====
lujvo
==== creator ====
[[personal/krtisfranks|krtisfranks]]
==== time entered ====
Thu Dec 11 18:18:00 2014
 
== English ==
=== Definition #63916 - Preferred ===
 
==== definition ====
x<sub>1</sub> [possibly dimensionful number] is the local density/concentration of/in x<sub>2</sub> (object) per unit x<sub>3</sub> at locus x<sub>4</sub>, of density type x<sub>5</sub>; x<sub>2</sub> measures x<sub>1</sub> units of x<sub>5</sub> per unit x<sub>3</sub> at locus x<sub>4</sub>.
==== notes ====
x<sub>5</sub> might typically refer to count - not mass. Not necessarily (although possible) volumetric mass density; could be temporal, per unit area, per unit length, or other (x<sub>3</sub>); could be non-mass-based (such as for electric charge or probability densities; x<sub>5</sub>); relative concentration would be a count density (x<sub>5</sub>) per count of another substance (x<sub>3</sub>). Can be applied to number/count; thus, the units may vary and in fact the quantity might even be unitless. In a sense, intensities and fluxes are spacial-temporal densities. It is recommended that x<sub>2</sub> be a physical entity/object/field or probability distribution in some sense (not merely have physical quality/meaning/value); thus, while this word could be applied to many things described with the word "per", it would probably not make much sense to call velocity a temporal displacement density (although in some contexts it might). Notice that "local" implies derivatives (Calculus differentiation).
==== gloss words ====

<ul><li>[[natlang/en/concentration|concentration ; count density]]</li><li>[[natlang/en/density|density ; completely general]]</li><li>[[natlang/en/flux|flux ; general; density]]</li><li>[[natlang/en/intensity|intensity ; concentration, flux, density]]</li></ul>

==== created by ====
[[personal/krtisfranks|krtisfranks]]
==== vote information ====
2
     
==== time ====
Mon Dec 24 03:02:51 2018



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=== Etymology ===