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Topic: Mathematica and Lisp
Replies: 83   Last Post: Mar 5, 2013 10:12 PM

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Richard Fateman

Posts: 286
Registered: 12/7/04
Re: Mathematica and Lisp
Posted: Feb 9, 2013 12:43 AM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

Regarding the Therac-25 (not theravac);
you can read about it on Wikipedia.
http://en.wikipedia.org/wiki/Therac-25
and also look at the links, especially Nancy Leveson's report
http://sunnyday.mit.edu/papers/therac.pdf
especiall page 7, top.
which I think is the most significant.

As I recall, the operator editing the display screen used
carriage returns etc to go between fields and thought that
the actual settings were reflected by what appeared on the screen.
This was not the case.

There are other factors too. Lack of hardware interlocks, certainly
a systems design error, also
meaningless error messages (how could THAT happen?)
hard to debug programming language (assembler).





Date Subject Author
1/11/13
Read Mathematica and Lisp
amzoti
1/12/13
Read Re: Mathematica and Lisp
Richard Fateman
1/12/13
Read Re: Mathematica and Lisp
David Bailey
1/14/13
Read Re: Mathematica and Lisp
Richard Fateman
1/14/13
Read Re: Mathematica and Lisp
David Bailey
1/16/13
Read Re: Mathematica and Lisp
Richard Fateman
1/18/13
Read Re: Mathematica and Lisp
David Bailey
1/22/13
Read Re: Mathematica and Lisp
Richard Fateman
1/22/13
Read Re: Mathematica and Lisp
David Bailey
1/24/13
Read Re: Mathematica and Lisp
Richard Fateman
1/25/13
Read Re: Mathematica and Lisp
Richard Fateman
1/26/13
Read Re: Mathematica and Lisp
Murray Eisenberg
1/26/13
Read Re: Mathematica and Lisp
Murray Eisenberg
1/26/13
Read Re: Mathematica and Lisp
W. Craig Carter
1/16/13
Read Re: Mathematica and Lisp
Murray Eisenberg
1/16/13
Read Re: Mathematica and Lisp
Richard Fateman
1/16/13
Read Re: Mathematica and Lisp
David Bailey
1/18/13
Read Re: Mathematica and Lisp
Murray Eisenberg
1/31/13
Read Re: Mathematica and Lisp
Noqsi
2/2/13
Read Re: Mathematica and Lisp
Daniel Lichtblau
2/3/13
Read Re: Mathematica and Lisp
Richard Fateman
2/2/13
Read Re: Mathematica and Lisp
Richard Fateman
2/3/13
Read Re: Mathematica and Lisp
David Bailey
2/5/13
Read Re: Mathematica and Lisp
Richard Fateman
2/6/13
Read Re: Mathematica and Lisp
David Bailey
2/6/13
Read Re: Mathematica and Lisp
Richard Fateman
2/3/13
Read Re: Mathematica and Lisp
Andrzej Kozlowski
2/5/13
Read Re: Mathematica and Lisp
Richard Fateman
2/6/13
Read Re: Mathematica and Lisp
David Bailey
2/8/13
Read Palette problem with Feynman slash notation
Dave Snead
2/5/13
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Bill Rowe
2/6/13
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Joseph Gwinn
2/3/13
Read Re: Mathematica and Lisp
Matthias Bode
2/3/13
Read Re: Mathematica and Lisp
Noqsi
2/6/13
Read Re: Mathematica and Lisp
Richard Fateman
2/6/13
Read Re: Mathematica and Lisp
David Bailey
2/6/13
Read Re: Mathematica and Lisp
mathgroup
2/4/13
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Alex Krasnov
2/6/13
Read Re: Mathematica and Lisp
Noqsi
2/8/13
Read Re: Mathematica and Lisp
Richard Fateman
2/9/13
Read Re: Mathematica and Lisp
János Löbb
2/9/13
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Richard Fateman
2/10/13
Read Re: Mathematica and Lisp
michael
2/10/13
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Bill Rowe
2/8/13
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Andrzej Kozlowski
2/8/13
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Noqsi
2/9/13
Read Re: Mathematica and Lisp
Richard Fateman
2/10/13
Read Re: Mathematica and Lisp
David Bailey
2/9/13
Read Re: Mathematica and Lisp
Matthias Bode
2/15/13
Read Re: Mathematica and Lisp
Noqsi
2/17/13
Read Re: Mathematica and Lisp
David Bailey
2/18/13
Read Re: Mathematica and Lisp
Joseph Gwinn
2/18/13
Read Re: Mathematica and Lisp
David Park
2/22/13
Read Re: Mathematica and Lisp
Richard Fateman
2/23/13
Read Re: Mathematica and Lisp
David Bailey
2/23/13
Read Re: Mathematica and Lisp
Richard Fateman
2/25/13
Read Re: Mathematica and Lisp
David Bailey
2/26/13
Read Re: Mathematica and Lisp
Richard Fateman
2/27/13
Read Re: Mathematica and Lisp
Bill Rowe
2/27/13
Read Re: Mathematica and Lisp
Richard Fateman
3/2/13
Read Re: Mathematica and Lisp
Bill Rowe
3/3/13
Read Re: Mathematica and Lisp
Richard Fateman
3/3/13
Read Re: Mathematica and Lisp
Noqsi
3/5/13
Read Re: Mathematica and Lisp
Richard Fateman
3/5/13
Read Re: Mathematica and Lisp
Vince Virgilio
3/3/13
Read Re: Mathematica and Lisp
Bob Hanlon
1/16/13
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Noqsi
1/16/13
Read Re: Mathematica and Lisp
Richard Fateman
1/18/13
Read Re: Mathematica and Lisp
Noqsi
2/23/13
Read Re: Mathematica and Lisp
Dr. Peter Klamser
2/25/13
Read Re: Mathematica and Lisp
Richard Fateman
2/26/13
Read Re: Mathematica and Lisp
Noqsi

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