On Sep 29, 2009, at 4:18 PM, Chris Partridge wrote: (01)
> 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. (02)
OK, but this does not contradict anything anyone has said. It is a
property of the object, and its value is a temperature (better, it is
a relationship between the object and a temperature.) It is, however,
not the property which we commonly call 'the temperature of the
object'. I see no problem here that needs anything special to be done
or discussed. (03)
Pat H. (04)
>
> 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
>
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>> -----Original Message-----
>> From: uom-ontology-std-bounces@xxxxxxxxxxxxxxxx [mailto:uom-ontology-std-
>> bounces@xxxxxxxxxxxxxxxx] On Behalf Of Gunther Schadow
>> Sent: 29 September 2009 21:51
>> To: uom-ontology-std
>> Subject: Re: [uom-ontology-std] What is mass?
>>
>> Matthew West wrote:
>>> Dear Ingvar,
>>>
>>> This sounds like an interesting challenge.
>>>
>>>> I am as aware of the contents of VIM as of the SI brochure, and
>>>> your
>>>> "n.b." makes exactly my point. What you might call "newton-meter as
>>>> a unit
>>>> alone", I prefer to call "nominal newton-meter". However, note that
>>>> only
>>>> some units can be called nominal units and tied to more than one
>>>> kind-of-quantity; many units are unambiguously tied only to one
>>>> kind-of-quantity.
>>>
>>> Could you give me a unit (or two) that you think only applies to one
>>> kind-of-quantity, and I'll see if I can identify another?
>>>
>>> Engineering is full of things like Maximum Allowable Working
>>> Temperature, which is certainly not a temperature (try measuring
>>> it with
>>> a thermometer).
>>
>>
>> Why is maximum allowable temperature not a temperature? Just because
>> it isn't realized? It is a temperature specification. It is a
>> quantity
>> even if it doesn't exist anywhere at any particular moment in time.
>>
>> But of course that is another issue and I still agree that a maximum
>> allowable temperature of this machine can not be well compared with
>> the water temperature of my pool -- but then they can if the machine
>> is meant to go into my pool (which I don't have)
>>
>> -Gunther
>>
>>
>> --
>> 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
>>
>>
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> (05)
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