Electric meters often blink a signal LED for every X kWh, so other devices can read the signal. I'm not sure if this is used for bidirectional communications, though.

No, but they also have a separate infrared interface for this.

https://en.wikipedia.org/wiki/IEC_62056

Smart meters have a whole protocol

There is pdftk.

https://www.pdflabs.com/tools/pdftk-server/

No, because you can install and configure the firewall before you install package X. (without knowing anything about X, your firewall defaults can just prevent X from doing anything)

But you can't (easily) configure package X itself before you install it; and after you install it, it runs immediately so you only get to configure it after the first run.

The library developed and used by 3blue1brown [1] is open-source [2] and seems to fit the same use case. I don’t know about widely-used, though.

[1] https://3blue1brown.com [2] https://github.com/ManimCommunity/manim

I have worked through a significant portion of the GPS one, and I learned a lot. I didn't do it in one go, though. Learning takes time.

Below the first video, it says:

> Images were captured using a combination of confocal and two-photon microscopy, live imaging isolated mouse ovarian follicles.

Dang, thanks. Sloppy on my part!

By "hearing" words, sentences, dialogues in their mind. Just like imagining a picture, but audio instead.

but words, sentences, and dialogues are all features of language.

Hetzner VPS hosts have 10 GBit links.

Huh you're right, they say their VPSes have 10gig but their dedicated boxes only have 1gig, even the really expensive ones. That seems backwards.

Their VPS hosts have a 10GBit uplink, but they offer no bandwidth guarantees per VPS and state you can expect 300-500MBit/s[1]. Their dedicated servers have a 1GBit uplink with guaranteed 1Gbit/s bandwidth.

[1]: https://docs.hetzner.com/cloud/technical-details/faq#what-ki...

The Hetzner Cloud ARM instances I believe are on 2.5Gb or 1Gb links. I've never been able to get > 1Gbit on the ARM instances, but easy getting it on x86_64.

It looks like you have to manually add a 10G uplink to dedicated boxes: https://docs.hetzner.com/robot/dedicated-server/network/10g-...

Not quite correct. Their dedicated servers base configuration have 1gig. But when ordering you can add 10gig as an easy option (or add later). The 1 gig is too cheap to meter with free traffic. If you choose 10gig you pay for the traffic. Those who need it might use it :-)

We had a fleet of dedicated hetzner boxes w/10 gbit, it’s just an option you get and pay a little extra for. Generally had good performance as well.

The path from source code to distributed binary file is known to be a blind spot.

Removing that blind spot is either Harder Than You'd Think or Easier Than You'd Think, depending on your perspective and expectations. You can find some issues listed here:

https://reproducible-builds.org/docs/

Or the homepage of reproducible-builds.org for a general take on the subject. (I am not associated with that website.)

Definitely Harder Than You'd Think and we've known this for a very long time.

https://research.swtch.com/nih

Even more interesting is the software that does SELECT * FROM just to display two rows.