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fch42

288 karma · joined May 5, 2022

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fch42··on Florilegium: Procedural Flowers in LaTeX
This is beautiful - thanks for sharing.
fch42··on 3rd Yandex Cloud Data Center Was Hit
Well ... first, that needs a "gadget" suitable for creating an EMP - which is still higher-rate tech than a missile being able to just reach a few hundred miles altitude and then "conventionally blow up into tiny pieces". And second ... as I said, as belligerant or terrorist, why would you not want to destroy / orbit-poison ? Why would it ever be a good idea to "destruction-less disable" space infrastructure?
fch42··on 3rd Yandex Cloud Data Center Was Hit
Indeed ... yet the servers for that already exist and are largely ground-based - "edge" compute of the large CDNs through which much of the internet's traffic flows anyway.

Will starlink build its own edge ? Maybe. We'll see. Whether it makes sense to have this infrastructure "colocated in space" if you're not also the owner of the "connection infrastructure in space" though? It'll come down to cost. If I were anyone else but SpaceX ... that's where my eyes would be.

fch42··on 3rd Yandex Cloud Data Center Was Hit
If you solve your cooling problem in space by distributing 10000 servers across 100 orbits then you replace one engineering challenge with the next; good luck with the satellite-satellite optical crossbars, and even more with the time travel beam shapers to get the communication latency between the components of your "orbit-distributed data center" to-target.

(the sarcasm is intended; there are some usecases for "space servers", around stealth for sure; to "scale it like a terrestrial DC" though ... dunno; not matter how I turn it, it just seems crazy expensive)

fch42··on 3rd Yandex Cloud Data Center Was Hit
To merely destroy "space data centers", you need not have very advanced targeting technology nor space lasers or whatnot. Just launch a few things releasing little ball bearings or steel needles or something like that - and "poison" the entire orbit.

If all you seek is to destroy (how en-vogue...) then that's more than perfect; not just destroy what's there but also make sure that by virtue of what remains (debris) nothing will get re-built.

fch42··on Teams in Vienna and Beijing have built the first thorium nuclear clocks
While it's correct that fusion stops producing energy once the fusion product is iron, it is not true that all elements beyond iron are only produced in cataclysmic events (supernovae / neutron star collisions).

Stars can function as "breeder reactors", where the natural flow of neutrons produced as intermediate / side effect of the various fusion reactions going on in a later-stage-life star get absorbed by nuclei and then (by beta decay) produce beyond-iron elements. This is called the "s-Process" (slow), and responsible for a large range of elements into the Lanthanides or so. And stellar winds, or the planetary nebula stage at the end, will return some of this to the interstellar medium.

It's correct that the heaviest "naturally present" elements require the so-called "r-Process", heavy overabundance of neutrons / extremely high neutron flow as in supernovae, or direct fusion of beyond-iron nuclei as in neutron star collisions.

There is rather active research happening here, both astronomical (trying to detect various nuclei from x ray spectroscopy of cataclysmic events) and theoretical (because r-Process cannot be simulated in labs since the neutron fluxes needed are not within our reach).

That said, it remains true that many "transition groups" elements are bred via s-Process in relatively-ordinary stars.

fch42··on New Jersey fines data center $1.1M after drone pics expose 62 gas generators
What a weird argument. If one doesn't trust private enterprise to "do right" then the state is nannying and oppressing companies, and if one does and therefore only inspects once a year or so then the state is neglecting their duties...

Public inspectors can't do right.

Maybe it is also fair to ask, did the developer/operator try to get away with something there? Do and hope for forgiveness instead of asking permission?

(and the "fine" is laughable, especially since retrospective permit is rather likely; in fact the fine might not even be higher than the cost of any project delay from requesting the generators at planning approval stage...)

fch42··on What California is learning from solar panels built over irrigation canals
"Wir Kinder vom Bahnhof Zoo" probably rings a bell for you. With respect to drug addiction, in Europe/Germany at least, I'm more inclined to say "little has changed in 40 years" than to say "things are worse now".

It's sobering to think we've not made much inroads into giving addicts a better perspective (or getting "preemptive" messaging across) in all that time.

fch42··on What California is learning from solar panels built over irrigation canals
I do wonder; my naive expectation is that while it will solve "petty criminality out of need" it would do little to "pretty criminality out of boredom / for-fun".

And BI would be attacked for the latter - some ingrateful on-basic-income person committing vandalism for no financial benefit. It's the "workhouse"/"treadmill" argument - supposedly boredom breeds crime and people must be made to work, even pointless or below-poverty tasks, else the streets get taken over by criminals or worse.

Like tourists taking over the country.

Arguments acknowledging (and steering / manipulating) feelings weigh stronger here than economic facts, alas.

fch42··on NASA’s Mars Sample Return mission is dead
And noone has yet mentioned SpaceXman ? It's pocket money to him, would be a great demonstration of philanthropy as well as "private research ability".

Do it !

fch42··on Why are there no flow batteries with symmetric ferrocyanide electrolytes?
well, if money were to be spent, in that case better build electrical charging infrastructure than upgrading the gas pumps ...
fch42··on Why are there no flow batteries with symmetric ferrocyanide electrolytes?
Well they sell that liquid explosive terrorists use to make molotov cocktail firebombs, at every fuel station without particular volume limits at all. It's also sufficiently toxic that care is taken at salespoint to limit customer exposure to the vapours.

(these things are "all relative, if the value, measured in "convenience to the customer", is high enough, ways will be found to permit sale)

fch42··on An Interesting Fourier Transform – 1/f Noise (2007)
The paper linked at the "see also" section ? (thx)
fch42··on Video2NAND – Abusing video codecs for great computational power
Mapping the abilities of (fixed-function) "stream transformers" to compute is old, much older than "GPU libraries" or render pipelines and all that. I remember the Commodore Amiga used the blitter's combine to decode/encode floppy data, but there are likely other examples predating that. In which sense is VP8 "different" there from another "fixed-function" processor?
fch42··on LEDs’ potential to save our night skies
unfortunately they never are. Brightness-adjusted, that is. Everyone installing lighting fixtures these days believes they must be daylight-level bright. The only ghosts you see are afterimages if you happen to look straight at the streetlamp ...

(I find it odd; dark-adapted eyes see a lot, including movement in shadows or low-contrast obstacles - after all, our bodies know how to see well at moonlight levels of illumination. Why are we so keen to kill this ability?)

fch42··on The deadly rise of giant trucks and SUVs
the sad thing, in a way, is that the law entitles the pedestrian here but doesn't protect them. One could make an argument that cars which take the "visual" away from the driver should simply be illegal. Why can they even be sold ?

(ok ... trying to be pointy. As a rarely-driver and not-car-owner I do not feel much sympathy for drivers-of-hazards; because you can't care since you drive a car that makes it impossible to care means others should "do your job" ? That's victim inversion)

fch42··on TerraPower in deal with Meta for eight Natrium 345 MW nuclear plants
There probably is an EU derangement syndrome. If it can afflict the English, it can afflict everyone. Maybe the original poster should consider a sightseeing trip to Europe.
fch42··on Cloudflare to cut about 20% of its workforce
Ranking software engineers is famously hard. What does "top 40%" even mean ? Skills/Experiences/Productivity in that sector are not some Gaussian Distribution of trivially-measurable output. But even if measurable, they're not gaussian distributed for sure. My mum won't make a software engineer anyone would hire no matter how much AI you gave her to assist. If you fire all your developer staff other than the "10x-ers" who with AI assistance have gamed your metrics^W^W^Wboosted their skills to become 100x-ers then you rip the floor from your company; noone to question or review the golden code, 100% trust into something you barely understand and cannot question, and you pay for it. Maybe little now while you're being fixed on. Once AI operators try to get their "money back", there's the sucking sound of a few trillion moving from AI users to ... somewhere. Not your share price, though.

AI is a great tool. Including for software engineers to train with and learn new skills, find new application areas, build new products. It's not doing it justice to call it "autocomplete on steroids". If these five "100x-ers" leave a year in to found their own company, not the least because they've become aware of the size of the mess, then good luck swinging your product strategy to "hey AI, sell this product I'm going to tell you to build".

fch42··on Cloudflare to cut about 20% of its workforce
These relative figures mean nothing. Your usage of one specific ultra-new model went from one hour a month to seven? congrats to the 600% increase. Your use of a widespread common model went from 1M tokens to 7M tokens ? Also a 600% increase. Your spend on AI from 1M/month to 84M/year ? ditto.

Other than the latter, I'd read all this as meaningless. Am I wrong?

fch42··on Cloudflare to cut about 20% of its workforce
"velocity" is not "frequency"; someone throwing semi-finished products at the wall to see what sticks surely has frequent product launches. But even if these ship fast from inception to launch, this scattergun approach does not scale to provide product maintenance or support. It's a productivity smokescreen for lack of a product strategy, and claiming AI will substitute for support/maintenance fits straight in with that. Anything but coherent strategy, that. Maybe here's an unexplored AI opportunity.
fch42··on The One Dollar Counterfeiter
German 50 Trillion (Marks) _stamps_ from 1923 are (literally) a-dime-a-dozen because postal services had a giant amount of them printed for issue in fall-1923 - just to have the whole lot rendered obsolete by the November currency reform. Unstamped/new they're not worth the paper they're printed on. Verifiably used / franked actually on a postal package they are much rarer. Fortune reversal - the worthless item becoming the collectible...
fch42··on Global growth in solar "the largest ever observed for any source"
can't help but wonder if the aggregate of the solar PV subsidies made in the last 25 years are higher or lower than the aggregate of energy price subsidies made when the Ukraine and/or Iran wars made fossil fuel prices spike...

Anyone got verifiable references?

fch42··on Too much discussion of the XOR swap trick
xor'ing the elements of lists together also allows a test of "unordered equality" because 1^2^3^4^5 == (xor of any permutation of [1,2,3,4,5]).

Yes there are false positives, and the false negative of all-zero/all-equal, but the test can be useful in a "bloom filter" type case.

Have used it in dynamic firewalling rules ... one can do something pretty close to a JA3/JA4 TLS fingerprint in eBPF with that (to match the cipher lists).

fch42··on Am I German or Autistic?
I always thought I had learned to successfully mask as one of my compatriots, but the test ruthlessly exposes me as 80% Autistic / 20% German.

The test is broken, if you ask me.

fch42··on Tracing Goroutines in Realtime with eBPF
https://docs.rs/tokio-console/latest/tokio_console/ comes to mind.

I'm not aware of eBPF-based dynamic instrumentation for either tokio or other async runtimes, but I'm also not (in need to be) debugging this on a daily basis.

fch42··on Solar and batteries can power the world
> "... handwavy crap ..."

handwavy argument. Yes, in the (sub)tropics the argument is even stronger pro-PV, not the least because it'll give you the opposite of heating - aircon - for free right when you need it. And considering summer heatwaves as have been seen the last few years "way north", that benefit will extend that way even if you wouldn't bother considering letting it "assist", if not fully replace, your heating. That said though, for 50° polewards and above, if you wanted to use PV in winter orient the panels vertically. If you can clad your too floor with shiplap larch so you can with PV panels. Given the price of timber ... there's a plan.

(only saying handwaving goes both ways)

fch42··on SpaceX files to go public
Definitely not a usecase for Starlink.

For the microseconds-chasers, there's microwave relay links, say between Chicago and New York (ref e.g. https://bullseye.ac/blog/economics/inside-the-world-of-high-...). Sending a signal up a few hundred km and down again a few hundred km adds way too much latency, and signal-hopping between fast-moving satellites adds way too much jitter for "such applications".

fch42··on Global warming has accelerated significantly
Air pollution (from smog) in India is already at a "seasonally deadly" level. If you haven't been to India during late autumn, it's hard to imagine how bad it is. Your eyes burn and every breath stings, you literally taste the acrid smog all the time.

India is working hard to get that down. It's a much more tangible and immediate problem there than the thought some parts of the country may become so hot as to be unliveable. Addressing thst, in India, is a side effect / a benefit of cleaning up the air, as much as energy autarky via Solar PV has the benefit of becoming independent of oil imports. India has coal. Lots of it. It's cheap to them. It doesn't particularly want to use more of it because of the associated air pollution and also because cooling water for thermal power plants competes with drinking water for people in some places.

Personally I think India is rather pragmatic here. Battery banks for scooters in the cities? tick. Buildout of PV? tick. Electric car charging stations? tick. Replacing wood, coal and other dirty cooking fuel by gas? Also tick. India just doesn't bother fighting some internal culture wars about how great fossil fuels or renewables are. They just move ahead more or less silently.

fch42··on Court orders restart of all US offshore wind power construction
Sometimes, not to do something can be the right (morally, technically, economically, ...) thing to do.

You don't always need to present the other cheek to do right. Neither do you always need to retaliate.

Nord Stream finally made it clear to Germany that "convenience" isn't a durable energy market strategy.

It's not correct though that Germany has done "nothing". The suspects are pursued by Germany, https://www.dw.com/en/nord-stream-poland-blocks-extradition-... so there's that.

If you mean though whether there's a will in Germany (nevermind a commitment or funding) to rebuild Nordstream ... you're right, nothing has happened

fch42··on Court orders restart of all US offshore wind power construction
Except funding is not everything that's needed for long term projects. There are other resources - workforce, supply chain integrity, legal entitlements and approvals, etc, that are all contributing to "plannable delivery" of long-term projects. And quite a few of these are very much subject to the vagaries of democracy.

Unless, of course, you assume (the ideal to be) an entirely anarchist business environment where whoever-with-resources can do whatever. Democracy, though, is not that.

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