An object may have the property "maximum allowable temperature" (01)
That object would also have the property "actual temperature" at
any point in time. (02)
The object might never have the property "actual temperature" whose
quantity value is equal to its property "maximum allowable
temperature". (03)
Either way, maximum allowable temperature and actual temperature
are both special kinds of temperatures. (04)
regards,
-Gunther (05)
Chris Partridge wrote:
> Gunther,
>
> Maximum allowable temperature is a disposition of the object.
> The object may reach never reach that temperature, or may reach it, even
> exceed it, but that does not have much, in itself, to do with the property.
>
> The property is something like: other things being equal, if you stay below
> this temperature the object (more often, a type of object) will operate as
> specified - if you go above it then it may not.
>
> (Allowable is probably not the best example, as one could try and cash this
> out by saying that one is defining two states that the object can be in -
> below (or equal) to the maximum and above the maximum. But that would ignore
> the intention that staying within the 'allowable' range should provide some
> guarantee of normal operation.)
>
> So, the object has (or does not have) this property whatever its actual
> temperature.
>
> I suppose one could argue that these are not quantities at all - but then (I
> am told) most useful engineering measures would be excluded.
>
> Regards,
> Chris Partridge
> Chief Ontologist (06)
--
Gunther Schadow, M.D., Ph.D. gschadow@xxxxxxxxxxxxxxx
Associate Professor Indiana University School of Informatics
Regenstrief Institute, Inc. Indiana University School of Medicine
tel:1(317)423-5521 http://aurora.regenstrief.org (07)
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