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nolta

299 karma · joined April 7, 2015

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nolta··on On the Navier–Stokes Millennium Prize Problem
> We did not rush to publish even though the other team wasn't communicating with us.

Pretty clear this was rushed: there are no comments from external mathematicians, unlike the Erdős announcement:

https://openai.com/index/model-disproves-discrete-geometry-c...

nolta··on SpaceX bond worth 10% less than issue price – heading for junk bond status
https://en.wikipedia.org/wiki/Ivar_Kreuger#B-shares
nolta··on SpaceX S-1
Anthropic can cancel the deal on short notice: “The agreements may be terminated by either party upon 90 days’ notice.”
nolta··on Syd the perhaps most sophisticated sandbox for Linux
Also this tutorial: https://man.exherbolinux.org/sydtutorial.7.html
nolta··on Webb and Hubble confirm Universe's expansion rate
You might like "Coming of Age in the Milky Way".
nolta··on Hubble’s Hitchcock Moment: An Explosion in Unexpected Place
should link to the original source: https://hubblesite.org/contents/news-releases/2023/news-2023...
nolta··on Google Launches AI Supercomputer Powered by Nvidia H100 GPUs
3250? The H100 NVL product spec [1] says it can do ~8 PFLOPs of FP8.

[1]: https://www.nvidia.com/en-us/data-center/h100/

nolta··on ESO event on groundbreaking results from Event Horizon Telescope Collaboration
There will be multiple press events around the world (Germany, Mexico, Chile, China, Taiwan, Japan, US):

https://eventhorizontelescope.org/blog/event-horizon-telesco...

nolta··on Rome: Decline and Fall Pt 1: Words
"[L]ook at those folds!" I'm looking at the folds, and they got worse.

And take the cover of the Lorsch Gospels: the misshapen fingers, the bulging eyes, the blank expressions -- this is crude, not stylized. You get the sense that art is devolving back to the "archaic smile".

nolta··on SSH Bastion Host Best Practices
It recommends:

  # Configure idle time logout
  ClientAliveInterval <value in seconds>
but i don't think this is correct. AFAICT, this is a keep-alive mechanism, not a timeout. I don't think openssh has an option to kill idle sessions.
nolta··on Nothing like this will be built again (2002)
1000+ mile links exist: https://en.wikipedia.org/wiki/High-voltage_direct_current
nolta··on The Rise of Meson
Yeah, i had the same reaction. For example, meson couldn't find pybind11 until i added `pybind11-config --cmakedir` to CMAKE_PREFIX_PATH.
nolta··on Types versus sets in math and programming languages
Here's a nice video with a little more detail on the difference between intensional/extensional: https://www.youtube.com/watch?v=bNG53SA4n48
nolta··on GM reveals more technical details of its Ultium battery packs
Original article:

https://www.caranddriver.com/features/a36877532/general-moto...

nolta··on Apache Arrow 3.0
To be fair, arrow absorbed parquet-cpp, so a little confusion is to be expected.
nolta··on Room 641A
Off-topic, but what kind of door lock is shown in this picture?

https://upload.wikimedia.org/wikipedia/commons/8/89/Room_641...

nolta··on A (possible) solution to Covid-19
Article [1] is dated Feb 12, and contains the sentence:

"Instead, it [SARS-CoV-2] appears to be no more concerning than the influenza virus." The citation for this claim is an article in Canada's National Post.

nolta··on Exponential Growth and Covid-19 [video]
In the last few days Ontario has found 2 cases of Covid-19 in people who recently travelled to the US:

https://news.ontario.ca/mohltc/en/2020/03/ontario-confirms-n... https://news.ontario.ca/mohltc/en/2020/03/ontario-confirms-n...

All the other cases we've seen were related to travel to Iran, Italy, Egypt, & China IIRC.

EDIT: one was a woman who returned from Colorado on Mar 2, the other a man who returned from Las Vegas on Feb 28.

nolta··on $50M worth of Tesla equipment sits unused in a Wheatfield warehouse
The DoD budget is ~$700B, so that's <0.1%
nolta··on Toronto area sent nuclear alerts by mistake
I wonder how many people are killed per alert?

These alerts (usually AMBER alerts) are sent to millions of people, accompanied by a loud and startling siren.

You can imagine all sorts of "one-in-a-million" events. The surgeon woken in the middle of the night, who can't get back to sleep and makes a mistake the next day. The startled roofer falling off a ladder. Etc.

nolta··on Boeing Sales and Profits Plummet as 737 Max Crisis Continues
Shareholders, the board, and upper management should be punished. But the company should not.

In a horse race, if the jockey is terrible you don't shoot the horse.

nolta··on Gigantic Chinese telescope opens to astronomers worldwide
TMT faces opposition at La Palma too:

https://www.sciencemag.org/news/2019/09/stalled-hawaii-giant...

nolta··on Taxpayers Should Never Subsidize Stadiums
http://www.fieldofschemes.com
nolta··on Ask HN: What are some of the best documentaries you've seen?
Plus its followup, "The Look of Silence" http://thelookofsilence.com
nolta··on The dubious distinction, and literary legacy, of Leo Szilard
Other errors of omission include:

* "When The Voice of the Dolphins was published, Leo hadn’t worked in physics in over a decade" fails to mention he switched to biology.

* "His first real permanent address in America was in La Jolla, where he retired" fails to mention he helped setup the Salk Institute (in La Jolla) and was a fellow there.

nolta··on Ask HN: Who is hiring? (August 2018)
CCAT-prime Telescope | Toronto | Developer | Full-time | ONSITE | https://ccatp.ca

We're building a 6-meter diameter telescope on a mountain in Chile's Atacama Desert to learn more about how stars form, the nature of dark matter and dark energy, neutrino masses, and the big bang.

The telescope will be shared by multiple instruments, and our group is building the joint software infrastructure: services for controlling the telescope, moving data around, monitoring, alerting, logging, etc.

Stack is still being decided but likely a mix of Go, Python, Redis, Postgres, etc. The telescope site is remote and hostile -- altitude of 5600m in the driest desert on Earth -- so we're focused on fault-tolerance.

https://utoronto.taleo.net/careersection/10000/jobdetail.ftl...

(It's listed as a one-year position, but we expect it to last at least 3-4 years)

Email jobs@ccatp.ca if you have any questions.

nolta··on Ask HN: Who is hiring? (July 2018)
CCAT-prime Telescope | Toronto | Developer | Full-time | Onsite | https://ccatp.ca

We're building a 6-meter diameter telescope on a mountain in Chile's Atacama Desert to learn more about how stars form, the nature of dark matter and dark energy, neutrino masses, and the big bang.

The telescope will be shared by multiple instruments, and our group is building the joint software infrastructure: services for controlling the telescope, moving data around, monitoring, alerting, logging, etc.

Stack is still being decided but likely a mix of Go, Python, Redis, Postgres, etc. The telescope site is remote and hostile -- altitude of 5600m in the driest desert on Earth -- so we're focused on fault-tolerance.

The ad should be posted in a couple of weeks, email jobs@ccatp.ca and we'll let you know when it's up.

nolta··on States Can Require Internet Tax Collection, Supreme Court Rules
The South Dakota tax only applies if you sell more than $100k or send more than 200 shipments, which factored into the decision:

Respondents argue that “the physical presence rule has permitted start-ups and small businesses to use the Inter­net as a means to grow their companies and access a national market, without exposing them to the daunting complexity and business-development obstacles of nation­wide sales tax collection.” These burdens may pose legitimate concerns in some instances, particularly for small businesses that make a small volume of sales to customers in many States. State taxes differ, not only in the rate imposed but also in the categories of goods that are taxed and, sometimes, the relevant date of purchase. Eventually, software that is available at a reasonable cost may make it easier for small businesses to cope with these problems. Indeed, as the physical presence rule no longer controls, those systems may well become available in a short period of time, either from private providers or from state taxing agencies them­selves. And in all events, Congress may legislate to ad­dress these problems if it deems it necessary and fit to do so.

In this case, however, South Dakota affords small mer­chants a reasonable degree of protection. The law at issue requires a merchant to collect the tax only if it does a considerable amount of business in the State; the law is not retroactive; and South Dakota is a party to the Streamlined Sales and Use Tax Agreement, see infra at 23.

nolta··on First detection of the missing half of normal matter in our universe
They're modelling filaments as cylindrical tubes of hot electrons connecting pairs of galaxies. I don't know what you mean by "mass associated with filamentary currents of energy", but while the electrons are hot (~million Kelvin), they're non-relativistic and their kinetic energy is negligible.
nolta··on First detection of the missing half of normal matter in our universe
> So, not only did they find some of the missing matter, they found some of the missing energy, too.

Nope, this has nothing to do with dark energy.

> This does, however, screw some of the more classical cosmologists.

Not sure who you're referring to. These results are completely consistent with the standard model of cosmology.

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