RE: SUO: The Plumbing Theorem(s)
Dear YY,
Some interesting points. See comments below.
Regards
Matthew
===============================================================
Matthew West http://www.matthew-west.org.uk/
Principal Consultant Shell Visiting Professor
Operations & Asset Management The Keyworth Institute
Shell Services International The University of Leeds
http://www.shellservices.com/ http://www.keyworth.leeds.ac.uk/
H3229, Shell Centre, London, SE1 7NA, UK.
Tel: +44 207 934 4490 Fax: 7929 Mobile: +44 7796 336538
===============================================================
> 1. From the point of flow, there is no difference between a T-
> junction pipe and an L-bend pipe. This shows a triad is weaker, if
> anything.
>
> 2. At a microscopic level, there is permeability of the pipe through
> millions of holes per meter, regardless of the network topology. The
> amount of osmosis depends on the contents of the pipe and the
> enironment in which it is embedded eg sub-zero air, flames.
MW: This might sound ridiculous to some, but when the pipe contains
hydrogen, it really is important, especially as the hydrogen in the
metal tends to cause brittleness.
>
> 3. The ancients mostly used an open half-pipe to distribute water,
> varying the distribution by observing the height in the channel.
> Cascades of half-pipes in different orientations allowed a
> reticulation system to be built with minimal resources.
MW: I like this example. We have also noticed non-physical connections.
But our examples tend to be around beams of light and prisms. Same
principle of course.
> yy
>
>
> ---- Begin Original Message ----
>
> From: "John F. Sowa" <sowa@bestweb.net>
> Sent: Tue, 20 Mar 2001 15:04:50 EDT
> To: standard-upper-ontology@ieee.org
> Subject: SUO: The Plumbing Theorem(s)
>
>
>
> To answer the questions about dyads and triads as simply as
> possible, I would like to explain the issues in terms that
> anyone can verify just by going down to the basement and
> examining the plumbing.
>
> Let us suppose that you had the following resources:
>
> 1. Long lengths of water pipe and the option of ordering
> more whenever you need it.
>
> 2. The ability to cut the pipe to any desired length and to
> finish the ends with whatever threading is
> needed to link
> it with suitable connectors.
>
> 3. A large supply of dyadic connectors: sleeves, which let
> you link two pipes in a straight line; and elbows, which
> let you link two pipes at an angle (usually a
> right angle,
> but other angles may be permitted).
>
> With those resources, you can direct water from the point of
> entry into your house to at most one faucet elsewhere in the
> house. You cannot direct the water to any additional faucets,
> bathtubs, showers, or toilets.
>
> But if you were given some triadic connectors (T shape or
> Y shape), you could connect one additional faucet or other
> facility for each triadic connector you use.
>
> Connectors with more than 3 links would be unnecessary.
> A tetrad (+ shape) could be used instead of two triads.
> But if you had enough triads, dyads, and straight pipe,
> you wouldn't need any tetrads, pentads, hexads, etc.
>
> All these facts can be verified by looking at the plumbing,
> playing with pipes, or drawing diagrams until you are satisfied
> that they are true.
>
> John Sowa
>
>
> ---- End Original Message ----
>
>
>
>
>
> -----A-d-v-e-r-t-i-s-e-m-e-n-t-s---B-e-l-o-w--------------
> Searching for the best free email? Try MetaCrawler Mail,
> from the #1 metasearch service on the Web, http://www.metacrawler.com
>