jrd259

14 ms·

121.
by jrd259 8y ago
Note also that the authors' long-term solution for non-motorists is for everyone to carry an "IoT" device broadcasting their presence. Who pays for these? Note that every person needs one, including children and tourists.
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by jrd259 8y ago
Note there were two versions of Logo for the Apple II. The other was developed by Logo Computer Systems Inc. (I was one of the staff). Our version was written first in Lisp (on Lisp Machines) then manually compiled to assembler. The Lis
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by jrd259 8y ago
Logo was more than turtle graphics. It also provided list processing with slightly friendlier names: Logo BUTFIRST is Lisp's CDR. This makes possible a great deal of purely linguistic programming, e.g. "20 questions game",
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by jrd259 8y ago
See also Mindell, David A. Digital Apollo. MIT Press 2011
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by jrd259 8y ago
> Triangular shapes are quite rare in human spaces (I don't have any in my house) Triangles are essential in low-weight rigid structures. Look at any exposed steel construction around you (a bridge, perhaps) and you will see many t
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by jrd259 8y ago
Black smokers are not volcanoes, but otherwise a good article. I'm glad they cited Lane, I've read one of his books and one of his papers. He makes a good argument for how the energy and chemo-gradients at the smokers make it a
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by jrd259 8y ago
For a more recent take on this, see James Scott's "Against The Grain". Scott presents evidence from archeology that the early state (at the dawn of state-organized agriculture) had to exert considerable effort to prevent agr