Image poisoning’s general principle is to change pixels in a way were our eye can’t notice, but that screw up the labeling by LLMs.

You can probably try to apply the same principle, poison the PDF in a way that only humans can read it.

Thing is, I assume you distribute your content on PDFs to make the content accessible to humans. That usually means having the text embedded for easy copy-paste and similar methods. Poisoning these might end up being counterproductive for your objective.

All this to say that No, I have no idea of a poisoning algorithm for PDFs

Not really, under an area blackout the fiberoptic transmitters will stop working, so you won’t be able to reach other areas/nodes even if your equipment has UPS power.

But, in general, the idea of a UPS is to provide enough supply to allow for an orderly shutdown, preventing equipment damage or data loss. Its not meant for long term operations.

For infrastructure and other critical applications, the UPS is designed to give you enough time to go start the diesel generator, and continue the operations.

As a bonus, some UPS have filters to ensure that delicate electronics get a nice, clean power wave. This is usually the case in UPS for data centres.

Btw, how are you liking down under’s “revolutionary” idea of Fibre + Copper? Is it as bad as it sounds?

When I encountered a similar situation I tried with the ikea speakers (Sonos Based) and I couldn’t get them to work without the sonos app, so I returned them.

I figured that a solution could be having, in each room, a mini-pc (RPi or similar) running RuneAudio and a set of speakers connected via audiojack.

I tried with 1 room and the proof of concept seemed to work, but didn’t invest on getting the rest of the house work.

In the end went for a couple of portable Bluetooth speakers to have floating around the place. Cheap and simple