Multipliers

[Matt Jones]

Tim,

Yes, I think they assume the unit conversion is linear.  I just noticed 
this the other day myself when going through the date/time stuff.  They 
have a multiplier and an intercept, as far as I can tell.  One can't 
even have polynomial relationships.  Log relationships would I think be 
common, so this is probably a problem.  I'll see if Peter Murray-Rust 
has something in mind here.

Matt

Tim Bergsma wrote:
> Matt,
> 
> Does STMML assume that all derived units are linear transformations of
> parent units (multiplier/constant)?  What if the unit is a LOG transform
> of some base unit?  pH, for example, is a log of an ion concentration. 
> The Richter scale for earthquakes is, I think, a log of energy
> propagation.
> 
> Tim.

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Matt Jones                                    jones at nceas.ucsb.edu
http://www.nceas.ucsb.edu/    Fax: 425-920-2439   Ph: 907-789-0496
National Center for Ecological Analysis and Synthesis (NCEAS)

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