K1TTT wrote:
On Dec 14, 6:41Â*pm, wrote:
K1TTT wrote:
On Dec 14, 4:54Â*pm, wrote:
Registered User wrote:
On Mon, 13 Dec 2010 19:51:07 -0000, wrote:

Have you the slightest clue what the word "context" means?

Absolutely, yes I do. In turn I will ask do you know what metadata is?

Yes, and I also know what ice cream is, both of which are irrelevant to
the discussion.

Both dimensional and non-dimensional metadata provide context.
Non-dimensional metadata doesn't always provide the complete context.
Dimensional metadata provides greater context because it conveys more
detailed and specific information.

Only an ignorant, anal retentive git would think that basic terminology has
to be defined each and every time it is used.

"Antenna efficiency is 20%" has all the information required and if the
discussion is about antennas, "efficiency is 20%" has all the information
required.

When data gets shared among multiple parties it is important that a
ubiquitous language is used to describe the data and its meaning.

The term "antenna efficiency" has a unique and unambigous definition and
can be found in any textbook on electromagnetics.

really? Â*i don't see either 'efficiency' or 'antenna efficiency' in
either my 2nd edition of jackson's classical electrodynamics, or
ramo,whinnery, and van duzer's fields and waves in communication
electronics... if you know where those terms might be defined in
either of those please let me know, maybe the indexes aren't complete
or something.

So change "any textbook" to "many textbooks".

--
Jim Pennino

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well, i kept looking.. arrl antenna book doesn't have it, but mine is
rather old maybe more recent ones have it.

aha! found efficiency in the ieee handbook of antenna design... but
it has subtopics:
aperture
beam
cassegrain
cross-polar
depolarisation in offset reflectors
illumination
offset antennas
polarisation
radiation

now exactly which definition do you consider the 'unique and
unambiguous' one??

The one that one normally means when not using a qualifier, radiation.


--
Jim Pennino

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