[seek-kr] ontology figure from abq

[Bertram Ludaescher]

Hi Matt:

Thanks! 

Shawn and I had discussed units, unit types, quantities, dimensions
and the likes today.

I found some interesting papers on "dimensional analysis" and was
wondering whether that could be a natural extension to the simple
"reasoning with units" that Shawn has implemented in Prolog.

I found this simple intro quite readable:
	http://www.physics.uoguelph.ca/tutorials/dimanaly/index.html

The next level seems this:
	http://www.wikipedia.org/wiki/Dimensional_analysis

which also has a pointer to Buckingham's \pi-theorem

This guy seems to be really ino dim.-analysis:
	http://www.isd.uni-stuttgart.de/~rudolph/

Also: this book includes a chapter on applying dimensional analysis to 
ecology:
	http://www.amazon.com/exec/obidos/tg/detail/-/0444892508/104-2454972-2037526?v=glance

What do the Eco-folks say? Is this worth investigating further for
adding not only unit conversion but more general reasoning and in
particular dimensional analysis to SMS?

Bertram



>>>>> "MJ" == Matt Jones <jones at nceas.ucsb.edu> writes:
MJ> 
MJ> Mark, Bertram, Shawn, and Rich,
MJ> I checked in the diagram that we made in ABQ regarding the carbon flow 
MJ> ontology.  It is in CVS:
MJ>    seek/docs/figures/seek-cf-measure-ontology.ai
MJ> and in case you don't have Adobe Illustrator:
MJ>    seek/docs/figures/seek-cf-measure-ontology.png
MJ> 
MJ> 
MJ> The major change is the addition of "UnitType" to the properties of 
MJ> MeasurementType.  I was thinking where "unit" went (as opposed to 
MJ> UnitType) and decided it was a property of a particular attribute rather 
MJ> than a MeasurementType.
MJ> 
MJ> This whole thing doesn't really consider nominal and ordinal scale 
MJ> things, so we need to determine how MeasurementScale fits in to the 
MJ> picture.  But I thought my updated version would be of use to you.
MJ> 
MJ> 
MJ> Matt
MJ> 
MJ> -- 
MJ> -------------------------------------------------------------------
MJ> Matt Jones                                     jones at nceas.ucsb.edu
MJ> http://www.nceas.ucsb.edu/    Fax: 425-920-2439    Ph: 907-789-0496
MJ> National Center for Ecological Analysis and Synthesis (NCEAS)
MJ> University of California Santa Barbara
MJ> Interested in ecological informatics? http://www.ecoinformatics.org
MJ> -------------------------------------------------------------------
MJ> 
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