CVS commit: src/usr.bin/units

["David A. Holland" <dholland%netbsd.org@localhost>]

Module Name:    src
Committed By:   dholland
Date:           Mon Mar 28 00:08:47 UTC 2011

Modified Files:
        src/usr.bin/units: units.lib

Log Message:
Update radioactivity-related units from http://physics.nist.gov/cuu/Units/.
The prior definition of sievert was, as far as I can tell, entirely wrong.

Caution: while "gray" and "sievert" have the same dimensionality,
they're not interchangeable -- you need to multiply by a fudge factor
that varies depending on the type of radiation and the tissue it's
affecting. (Dimensional analysis is often not a substitute for knowing
what you're doing.)

It would be nice if units had a way to warn users when they're trying
to do something that doesn't make sense, since there are lots of ways
to do so, but it doesn't, and it wouldn't be easy to arrange in the
general case.


To generate a diff of this commit:
cvs rdiff -u -r1.14 -r1.15 src/usr.bin/units/units.lib

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.