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Ton Van Den Bogert
01-09-1993, 09:29 AM
Dear Biomch-L subscribers,

The files stored in the BIOMCH-L FILELIST at LISTSERV@HEARN have been
reorganized, and some new ones have been added. To retrieve a file,
send a GET command to LISTSERV@NIC.SURFNET.NL or
LISTSERV@HEARN.BITNET, for example:

GET BIOMCH-L INFO

More GET commands can be combined in one mail message to LISTSERV
(each on a separate line). A complete list of all available files can
be obtained by 'GET BIOMCH-L FILELIST' (or 'INDEX BIOMCH-L').

All software stored in BIOMCH-L FILELIST is available for academic use
only. See the file BIOMCH-L INFO for more detailed copyright information.

The new files are:

BIOMCH-L GUIDE
--------------
This is the same file that was distributed before Christmas. General
information about BIOMCH-L and LISTSERV.

LPDECODE C
----------
If LISTSERV sends you a file with long lines (try GET BIOMCH-L
FILELIST), the lines are split up which makes the file hard to read.
LPDECODE.C is a program (in generic "C" language) to decode the files
from this "LPunch" format back to readable text. It is tested on
UNIX, but should run without modifications on any C compiler. To
compile this program on UNIX:

% cc -o lpdecode lpdecode.c

to decode a file:

% lpdecode file.out

Since lpdecode reads from standard input, it is possible to pipe the
output directly from your mail program, if it has that feature. In
the ELM mailer, you can do:

|lpdecode >file

to save and decode a file from incoming mail.

LPDECODE PAS
------------
A Turbo Pascal version of LPDECODE.C. It is quite old, so it may be
developed for an old version of TP (3.0, 4.0?). Not tested by me.

GCVSPL MEMO
-----------
Some additional information about the 'Woltring spline' software
(GCVSPL FORTRAN). Here you can find an equation to determine the
low-pass cutoff frequency corresponding to a certain smoothing
parameter in the spline routine. Also copyright information.

ANZ ANNOUNCE
------------
Announcement of gait analysis software by Dwight Meglan (Mayo Clinic,
Rochester MN). Also contains instructions for obtaining the source
code.

ANGLES3D TOPIC
--------------
This is a real gem. This file contains all discussions about 3D joint
angles on Biomch-L since 1989. There are some really brilliant
contributions (especially in the last part), detailed explanations of
mathematical methods, and also some humor. Remember, how Herman
Woltring tried to explain that 3-D angles of successive rotations
cannot be added like vectors:

It is rumoured that there once was a tribe of Indians who believed that
arrows are vectors. To shoot a deer due northeast, they did not aim an
arrow in the northeasterly direction; they sent two arrows simultaneously,
one due north and one due east, relying on the powerful resultant of the
two arrows to kill the deer. [etc. In the end of the story, the tribe
became extinct of course, because arrows are not vectors.]

Or when Giovanni Legnani wanted to call in the UN troops to stop the
fighting:

The war has broken out!

Will Woltring kill Grood before he goes on his sabbatical?
Will Grood win at the last minute or will he lose because he must leave?
Will Grood decide not to go on sabbatical to continue the fight?

Who knows? But now we are sure: the answer will arrive in a few days.

I hope that everybody is looking forward to seeing the end of this SOAP
OPERA. Nobody is still interested in the answer of the real problem.
But does anybody remember what was the first matter? I guess nobody.

And the final conclusion was:

SO THERE ARE ONE HUNDRED AND ONE WAYS TO SKIN THE CATS BUT THE
RESULT IS ALWAYS THE SAME!!!

If you are seriously interested in 3-D analysis of joint angles, this
must be read. From the development of this discussion in three years,
it becomes clear that a lot of progress in the understanding of a
complicated problem can be made by participating in a public
discussion by E-mail.

-- Ton van den Bogert, Biomch-L co-moderator