gavinsyancey
Joined 4 years ago
Joined 4 years ago
https://inews.co.uk/news/39-dead-two-high-speed-trains-colli...
- A fault in the signaling system caused an Iryo and a Renfe train to stop -- the Iryo train was in front.
- For some reason, the control center authorized the Renfe train to proceed at full speed, despite the cab signaling showing it should stop. It then hit the Iryo train that was stopped in front of it.
Reading between the lines, it sounds like the main issues that caused this are likely:
- Poor / improper maintenance causes the primary signaling/communication system to frequently fail. The standard "correct" behavior in this case is to manually authorize stopped trains to proceed slowly (at approx 10 mph so they can stop if they see another train) to the next station and wait for the system to be restored.
- Since the system was frequently failing and proceeding at slow speeds causes severe operational slowdowns, the control center started allowing them to proceed at linespeed instead, possibly with some ad-hoc checks to make sure the track was clear.
- That got normalized, and whatever ad-hoc checks (if any) they were doing failed in this case.
I'm not aware of the context here but that sounds like an interesting story. Could you give more details or do you know where I could read more about this?
> Consider this and then consider how it applies to every number in any dataset and everything an AI generates: with our normal human understanding of a number, the number theoretically contains all of the meaning of that number. A number intrinsically contains the fact of whether it's prime, whether it's irrational, whether it's a counterexample to the Riemann Hypothesis, all facts known and unknown. You don't need a human to interpret the number in order for the number to mean what it means. In fact, the longer a human spends interpreting, the more meaning they might find that a number intrinsically has in and of itself. And yet... can you think of a less meaningful way to fill up a datacenter than with an ordered list of numbers?
> Listing all possible proofs out of context, whether in order or randomly, would hardly be more meaningful than listing numbers. Almost all possible proofs are trivial and meaningless, mathematicians select for the fun stuff.
> But I will say, since it seems every player in the US government and economy have committed to all jumping off a cliff together in a stubborn wish to cover the country in datacenters, I could think of worse applications than to fill them up with every possible mathematical proof below a certain size.
> You'd end up with a Library of Babel of proofs.
> You can imagine the quality of literature you'd get if you trained an LLM on the Library of Babel, which contains every possible book (or combination of characters that fit in 410 pages). The library, by itself, functionally contains no information whatsoever. The LLM trained on it would be a literal smooth-brain with no correlations to wrinkle up those gradients.
> Without the context of language and how it’s used by people, a great work of literature is just another possible random combination of letters. This can be represented as a point in multidimensional space, and a computer can guess that maybe there's more things of interest to humans near where the stuff we already like is, but only humans know how to push further into unknown directions of multidimensional space that are interesting and worthwhile.
> Whenever a company or person shares something “AI generated” that seems pretty good, that tells me that the AI must necessarily be using a lot of human-created data in that same area. The AI can not have leapt there on its own, even if it might look like it did to a person not aware of the scope of human-made work that went into it.
> The Mathlib of Babel problem is one reason why, in my view, formal math and AI are just one tool that might be useful for some math sometimes, not the end of mathematics or the future of mathematics. Formal mathematics and algorithmically-assisted proofs are not my personal aesthetic but I think it should be somebody's, and it's not like our fragmented field doesn't know how to handle another specific expertise joining the mix. We've already folded them in.
Found this interesting and thought-provoking. Why do we care about these proofs? Why do we care about this art, or this code? Because it is what is useful and interesting to humans.
- Originally, IETF specified .home, but never went through the process to add it to the list of reserved names.
- Someone applied for the .home gTLD, and while it ultimately didn't go through there was a while while it was up in the air. Due to this the homenet working group had to change gTLDs.
- They decided to switch to .homenet. However, because of DNSSEC, whatever they used would need an insecure delegation in the root zone or validating resolvers wouldn't be able to resolve it. Since IAB controls .arpa but IANNA controls the root and there was no process to ask IANNA for this, they eventually decided to use home.arpa instead.
https://mailarchive.ietf.org/arch/msg/homenet/8cfJkr7SPMaPS4...
RFC 8244 is an interesting read on the topic: https://datatracker.ietf.org/doc/rfc8244/
https://icannwiki.org/Name_Collision_Risk_Management_Framewo...