I recently read the Shannon biography 'A Mind at Play' [0] which I guess is the full version of the article (same authors). It does (IMHO) a very good job at explaining entropy / information.
There are some papers from Prof. Braun describing experiments where he uses mutations from genetic / evolutionary algorithms to find the optimal structure of a neural net.
They write in the text that their model featured nonlinear transformations. I think the picture shows a simplified view and as the plots don't have labels it's not clear which space is regarded.
I'm using ZFS on my home server. The backups of my main system are created with the ubuntu desktop utility and written to the server via NFS.
This means I have incremental backups and the backups themselves are protected from a hardware failure using raidz.
A problem with this approach is the possibility to rm -rf /mnt/backup - that's why I only start and mount the server when I need it. It's not running 24/7.