Update some of the notebooks so that they'll execute on machines without cuda#1

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Shotgunosine wants to merge 4 commits intocompmem:masterfrom

Shotgunosine:master

Commits on Sep 17, 2020

Commits on Oct 1, 2020

Merge branch 'master' of https://github.com/compmem/SITH_Layer
Shotgunosine
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