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jessriedel commented on Bit flips: How cosmic rays grounded a fleet of aircraft   bbc.com/future/article/20... · Posted by u/signa11
pengaru · 7 days ago
"my sycophant agrees" simply isn't adding anything of substance
jessriedel · 6 days ago
If that's your honest impression, it's incorrect and I urge you to spend more time working with frontier models.
jessriedel commented on Bit flips: How cosmic rays grounded a fleet of aircraft   bbc.com/future/article/20... · Posted by u/signa11
RealityVoid · 8 days ago
You're missing that the systems were designed in the 90's and they had no edac on them but instead relied on redundancy and a consensus system. The fact bit flips happened is not why they grounded the things and updated sw, they grounded them to address the consensus algorithm in the other CPU that did not get the bit flips.
jessriedel · 8 days ago
Do you have a source on that? The current article describes the software very differently:

> In any case, the software updates rolled out by the company appear to be quick and easy to install. Many airlines completed them within hours. The software works by inducing "rapid refreshing of the corrupted parameter so it has no time to have effect on the flight controls", Airbus says. This is, in essence, a way of continually sanitising computer data on these aircraft to try and ensure that any errors don't end up actually impacting a flight.

jessriedel commented on Bit flips: How cosmic rays grounded a fleet of aircraft   bbc.com/future/article/20... · Posted by u/signa11
pengaru · 8 days ago
> GPT agrees

What do you think this adds? These things are sycophant confident idiots; they will agree and agree they're incorrect at the slightest challenge in the same interaction.

jessriedel · 8 days ago
I'm quite aware of the limitations. That's why I bothered to post a comment. But it's definitely better to do due diligence by asking first, since many responses can then be checked. Mentioning it in the comment shows the effort, similar to "Google turned up nothing".
jessriedel commented on Bit flips: How cosmic rays grounded a fleet of aircraft   bbc.com/future/article/20... · Posted by u/signa11
jessriedel · 8 days ago
I thought some combination of error correction and redundant systems was already widespread in airplanes to prevent cosmic-ray induced errors. (GPT agrees.) What am I missing? I've read multiple articles on this, and none of them address the fact that the problem, at the level of detail described in the article, should have been prevented by technology available and widely deployed for decades.
jessriedel commented on Waymo robotaxis are now giving rides on freeways in LA, SF and Phoenix   techcrunch.com/2025/11/12... · Posted by u/nharada
superfrank · a month ago
I've ridden in Waymos in LA, SF, and Phoenix. You're right about them being a bit conservative, but only in Phoenix did I feel like that really slowed my ride. In LA and SF there was so much traffic that even if cars pulled away from us, we'd catch them at the next red light.
jessriedel · a month ago
I check Google maps ETA estimates when I get in a car in SF; they are accurate for Uber or Lyfts, but Waymos are absolutely slower there. This is especially, but not exclusively, true for routes where a human would take the 101 or 280, for obvious reasons.
jessriedel commented on Venn Diagram for 7 Sets   moebio.com/research/seven... · Posted by u/bramadityaw
lisper · a month ago
> I decided to use colors rather than numbers or letters to identify each basic set, though I didn't use the same colors Newton did; mine are equidistant in the hue circle.

"Lawn green" and "medium spring green" look completely identical to me. Maybe I have a really obscure kind of color blindness?

jessriedel · a month ago
I have normal vision. I wouldn't say completely identical when they are side-by-side, but they are very close. It's effectively impossible to discriminate them when they are not side-by-side, which for this plot is very important.

The author's mistake was this: "[my colors] are equidistant in the hue circle". The problem is that the hue circle (at least under the parameterization scheme he used) is not uniform over discrimination, i.e., the ability to discriminate two hues is not invariant under displacing them an equal amount along the circle. (I presume this is one of those situation where it's misleading to think about three primary colors on equal footing because of quirks of human vision biology.)

First, the author could have chosen 7 hues at max-saturation that were easier to discriminate than this. But more importantly, he should have used the other color axes: saturation and brightness. dark red (~maroon) and light red (~pink) are a lot easier to discriminate, even when not next to each other, than the two shades of green he used.

jessriedel commented on Updated practice for review articles and position papers in ArXiv CS category   blog.arxiv.org/2025/10/31... · Posted by u/dw64
pbhjpbhj · 2 months ago
I suspect that any editorial changes that happened as part of the journal's acceptance process - unless they materially changed the content - would also have to be kept back as they would be part of the presentation of the paper (protected by copyright) rather than the facts of the research.
jessriedel · 2 months ago
As an outsider that's a reasonable thing to suppose based on a plain reading of copyright law, but in practice it's not true. Researchers update their preprint based on changes requested by reviewers and editors all the time. It's never an issue.
jessriedel commented on Man still alive six months after pig kidney transplant   nature.com/articles/d4158... · Posted by u/signa11
krackers · 3 months ago
But presumably the nerves between the brain and heart exist for a reason. What functionality do you lose by not reattaching them? Do things like "heart beating faster when nervous" depend on this nerve signaling, or is it done via other chemical signaling.
jessriedel · 3 months ago
Yes, nerves from the brain to the heart can influence heart beat (and other features like heart conduction and blood flow to the heart itself) in response to stress and exercise. Heart transplant recipients lose these features. They make poor marathon runners :)
jessriedel commented on Man still alive six months after pig kidney transplant   nature.com/articles/d4158... · Posted by u/signa11
daedrdev · 3 months ago
Reading up on this there is some chemical signaling from the blood, but the brain is not controlling the rate of the new heart
jessriedel · 3 months ago
He's asking about what the nerves do in a normal person

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u/jessriedel

KarmaCake day21028January 24, 2010
About
Physicist at NTT Research Physics & Informatics Lab. Interested in quantum information, decoherence, rigorously defining wavefunction branches, and classically undetectable soft-particle detection.

Postdocs at IBM Research (under Charlie Bennett) and at Perimeter Institute. UCSB Ph.D. 2012 (advisor: Wojciech Zurek). Princeton B.A. 2007. TJHSST 2003.

jessriedel.com

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