From: David Forbes [EMAIL PROTECTED]
Subject: Re: [time-nuts] Standards for units
Date: Mon, 2 Apr 2007 23:22:24 -0700
Message-ID: [EMAIL PROTECTED]
At 9:57 PM -0700 4/2/07, Tom Van Baak wrote:
1/meter/39.37 inches = 0.025400051 meters/inch ...
The interesting thing is that this result
This was sent before, but never seemed to get to the
net.
It is interesting to look in the front of the International
Critical Tables, an encyclopedic set of books containing detailed
scientific information about 1920. Every nation, (hundreds of them)
had their own
Now I thought the NTSC frame-rate was reduced so that the line
frequency was an exact sub-multiple (1/286) of the sound subcarrier
at 4.5 MHz, and hence sidebands of the color subcarrier were equally
positioned around the sound carrier. Using exactly 30 Hz frame rate
(15750 Hz line rate)
Dear all,
I have read some weird discussion about measurement units.
There is a wonderful book I come across, by Francois Caldarelli
You may take a look
http://rubiola.org/shared/caldarelli.pdf
then it's up to you
Best
Enrico Rubiola
professor of electronics
web:http://rubiola.org
Peter Vince wrote:
I can't find the reference :-(I'd love to read that RCA
document if it is available electronically.
Hello Peter,
While not exactly what you are after, this link may help.
http://tinyurl.com/245tjp
A couple of years ago, I had great fun playing with the maths, so I
Hello to all,
and thank you very much Enrico, a very nice and comprehensive
document.
There is a book on the market (2005) The Measure of all Things by
Ken Alder, Free Press New York, translated version in german (2006)
Das Mass der Welt. It tells on about 500 pages quite precise and
very
Hi:
What is it?
http://www.gmat.unsw.edu.au/currentstudents/ug/projects/f_pall/html/s19.html
The Scientific and Mathematical Instruments web page
http://www.gmat.unsw.edu.au/currentstudents/ug/projects/f_pall/html/scient__math.html
is part of the Univ of New South Wales Australia which may be a
Are there actually US people on this list who actually continue to
advocate the use of non-metric units in their country? Speak up!
Well the USA ever go metric?
As an Australian, why would I care, you may ask?
Well because of the dominance of the US market, some things can be sold
here using
Palfreyman, Jim L wrote:
Are there actually US people on this list who actually continue to
advocate the use of non-metric units in their country? Speak up!
Well the USA ever go metric?
As an Australian, why would I care, you may ask?
Well because of the dominance of the US market, some
The US has been metric since 1988, however the continued use of
customary units during the indefinitely long transition time is the
problem. Fundamentally it seems there is a lack of political will to
place a definite cutoff date on the use of customary units.
I have friends who work in
What is it?
http://www.gmat.unsw.edu.au/currentstudents/ug/projects/f_pall/html/s19.html
It might be some sort of filter or amplifier for WWV. (Or equivalent down
under.)
This one shows a recorder that does time stamps. They have to get the time
from somewhere.
From: Hal Murray [EMAIL PROTECTED]
Subject: Re: [time-nuts] Standards for units
Date: Tue, 03 Apr 2007 17:14:50 -0700
Message-ID: [EMAIL PROTECTED]
The US has been metric since 1988, however the continued use of
customary units during the indefinitely long transition time is the
problem.
Palfreyman, Jim L wrote:
Are there actually US people on this list who actually continue to
advocate the use of non-metric units in their country? Speak up!
Well the USA ever go metric?
As an Australian, why would I care, you may ask?
Well because of the dominance of the US market,
Hi:
There was a recent incident when a passenger aircraft (maybe Canada) had
to make an emergency landing because of a wrong metric - English
conversion resulted in not enough fuel to get to the destination.
Are there metric equivalents to different series of English threads.
For example I
Are there actually US people on this list who actually continue to
advocate the use of non-metric units in their country? Speak up!
Of course.
Well the USA ever go metric?
No.
I find it hard to understand why a country as advanced as the US sticks
with such an antiquated system. I don't
An Arianne 5 rocket had to be destroyed with its cargo when it veered
off course because of a faulty conversion from English to metric in the
guidance software. What a bummer!
I hate it when that happens!!!
Didier KO4BB
Brooke Clarke wrote:
Hi:
There was a recent incident when a passenger
Thomas A. Frank wrote:
Are there actually US people on this list who actually continue to
advocate the use of non-metric units in their country? Speak up!
Of course.
Well the USA ever go metric?
No.
I find it hard to understand why a country as advanced as the US
I have read some weird discussion about measurement units.
How about weird units? Velocity in attoparsecs (official SI
abbreviation apc) per microfortnight? A standard lecture being a microcentury?
http://en.wikipedia.org/wiki/List_of_strange_units_of_measurement
Hi Brooke,
Metric screws are spec'd by major diameter, and the number of mm between
the peaks of the threads. English are spec'd by diameter, and the
number of threads per inch.
A 40TPI screw corresponds to a (1/40) * 25.4 = 0.635 mm pitch. There
are standard metric pitches of 0.4, 0.45, 0.5,
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