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The Fed says this is a cube of $1M. They're off by half a million

https://calvin.sh/blog/fed-lie/
751•c249709•5h ago•285 comments

Figma Files Registration Statement for Proposed Initial Public Offering

https://www.figma.com/blog/s1-public/
103•kualto•2h ago•33 comments

The Roman Roads Research Association

https://www.romanroads.org/
15•bjourne•1h ago•2 comments

Feasibility study of a mission to Sedna - Nuclear propulsion and solar sailing

https://arxiv.org/abs/2506.17732
155•speckx•8h ago•51 comments

Ask HN: Who is hiring? (July 2025)

164•whoishiring•7h ago•178 comments

Code⇄GUI bidirectional editing via LSP

https://jamesbvaughan.com/bidirectional-editing/
69•jamesbvaughan•5h ago•24 comments

Show HN: Spegel, a Terminal Browser That Uses LLMs to Rewrite Webpages

https://simedw.com/2025/06/23/introducing-spegel/
283•simedw•9h ago•132 comments

The Hoyle State (2021)

https://johncarlosbaez.wordpress.com/2021/02/04/the-hoyle-state/
39•gone35•4h ago•7 comments

I built something that changed my friend group's social fabric

https://blog.danpetrolito.xyz/i-built-something-that-changed-my-friend-gro-social-fabric/
478•dandano•3d ago•200 comments

Show HN: Core – open source memory graph for LLMs – shareable, user owned

https://github.com/RedPlanetHQ/core
35•Manik_agg•5h ago•4 comments

Muxio: Rust layered stream and RPC toolkit

https://crates.io/crates/muxio
11•zombiej5•2d ago•0 comments

Experience converting a mathematical software package to C++20 modules [PDF]

https://arxiv.org/abs/2506.21654
83•vblanco•8h ago•15 comments

Building a Personal AI Factory

https://www.john-rush.com/posts/ai-20250701.html
19•derek•57m ago•8 comments

Ask HN: Who wants to be hired? (July 2025)

48•whoishiring•7h ago•137 comments

When Did Nature Burst into Vivid Color?

https://www.quantamagazine.org/when-did-nature-burst-into-vivid-color-20250627/
78•jandrewrogers•4d ago•52 comments

Cua (YC X25) is hiring an engineer

https://www.ycombinator.com/companies/cua/jobs/dIskIB1-founding-engineer-cua-yc-x25
1•GreenGames•5h ago

The Hidden Engineering of Liquid Dampers in Skyscrapers

https://practical.engineering/blog/2025/7/1/the-hidden-engineering-of-liquid-dampers-in-skyscrapers
20•chmaynard•2h ago•0 comments

OpenFLOW – Quickly make beautiful infrastructure diagrams local to your machine

https://github.com/stan-smith/OpenFLOW
254•x0z•15h ago•62 comments

The wanton destruction of a creative-tech era

https://blog.greg.technology/2025/06/30/fastly.html
23•gregsadetsky•3h ago•8 comments

Swearing as a Response to Pain: Assessing Effects of Novel Swear Words

https://www.frontiersin.org/journals/psychology/articles/10.3389/fpsyg.2020.00723/full
26•sega_sai•2d ago•21 comments

Graph Theory Applications in Video Games

https://utk.claranguyen.me/talks.php?id=videogames
45•haywirez•3d ago•4 comments

All Good Editors Are Pirates: In Memory of Lewis H. Lapham

https://www.laphamsquarterly.org/roundtable/all-good-editors-are-pirates
44•Caiero•2d ago•5 comments

Show HN: HackerNewt - Breadth-first exploring HN client for iOS

https://apps.apple.com/us/app/hackernewt-for-hacker-news/id6448201970
34•hnand•6h ago•22 comments

Show HN: Jobs by Referral: Find jobs in your LinkedIn network

https://jobsbyreferral.com/
100•nicksergeant•9h ago•53 comments

Show HN: Arch-Router – 1.5B model for LLM routing by preferences, not benchmarks

34•adilhafeez•4h ago•8 comments

1KB JavaScript Demoscene Challenge Just Launched

74•babakode•3h ago•13 comments

Show HN: I built the tool I wished existed for moving Stripe between countries

https://www.stripemove.com/
75•felphos•9h ago•36 comments

Slouching Towards Sensemaking

https://karanchawla.io/2025/06/29/sensemaking
11•karchaw•2d ago•0 comments

Sam Altman Slams Meta's AI Talent Poaching: 'Missionaries Will Beat Mercenaries'

https://www.wired.com/story/sam-altman-meta-ai-talent-poaching-spree-leaked-messages/
76•spenvo•4h ago•156 comments

HN Slop: AI startup ideas generated from Hacker News

https://www.josh.ing/hn-slop
70•coloneltcb•6h ago•25 comments
Open in hackernews

Simulations reveal the secret to strengthening carbon fiber

https://www.ornl.gov/news/simulations-reveal-secret-strengthening-carbon-fiber
33•gmays•4d ago

Comments

tonetegeatinst•4d ago
Describing the issues behind the cost prohibition of material science experiments and discovery, then handwaving it by just saying we can use supercomputing is incredibly ignorant of how inaccessible and coat prohibitive supercomputers are. Not to mention, even if your supercomputer has an idea you still need a lab that can confirm the idea.
bee_rider•7h ago
They spend a lot of text describing the fact that it wouldn’t be possible without Frontier, so I think they are aware of the cost. The whole ecosystem of little, easy to apply for compute credit grants, and then larger grants (like the one they mention applying for at the end) is part of the solution to that problem. It doesn’t seem like ignorance, but rather a choice to emphasize in the writing that they are part of the solution.
toss1•7h ago
Yes supercomputer time is scarce and expensive.

Physical laboratory time, materials, and workers are also scarce and expensive. And physical lab tests can consume a lot of calendar time.

So, even with the constraints and costs, using the supercomputer to run 1,000 or 10,000 tests and then physical lab tests on only the few most promising results can still less costly in both funds and especially calendar time than the costs and time to run a similar number of physical lab tests to produce the results.

It is literally a balancing of the scarcity and costs of each mode of getting to the results, and those experts in the field, with their own labs, are making the claim that this is the way their research should proceed. Do you have actual information and specific knowledge that in fact proves them wrong (b/c that comment seems a lot more hand-wavey vs theirs)?

lazide•5h ago
Only if the simulations are usefully predictive.

A lot of the physical lab tests end up showing effects we did not know exist, which is why they are interesting - simulations are historically terrible at predicting things we don’t know can exist.

See the pharma adventures in simulating potential drugs in the 90’s-early 2000’s. A lot of heat a noise for little actual effect.

toss1•1h ago
>>Only if the simulations are usefully predictive.

Of course; if you cannot make your simulations produce realistic output you are either wasting your time or are clearly not yet done building your simulations.

>> A lot of the physical lab tests end up showing effects we did not know exist, which is why they are interesting - simulations are historically terrible at predicting things we don’t know can exist.

Of course, there are the lab surprises, discovery of penicillin an early famous one. I'm absolutely not saying supercomputing simulation should replace lab work — In my own shop I do lab testing well beyond where most would go to simulation, precisely because there's no substitute for seeing the physical side-effects. But when someone randomly claims the team publishing very useful work is somehow wrong to use simulation, I think the real researchers in their lab & at their terminals know better than that post.

motorest•6h ago
> Not to mention, even if your supercomputer has an idea you still need a lab that can confirm the idea.

I think this is the critical aspect. You don't need to own a supercomputer to run simulations in supercomputers. Sometimes you don't even need supercomputers at all. It might be a challenge but it's not prohibitive.

What's clearly a blocker is the verification & validation work to assess if a specific model actually works. You need to run experimental tests to check if your module is any good, and you need to run experimental tests to check if the output of your computational models correlate with reality. That costs both time and money.

white_tiger•5h ago
Supercomputers are becoming more accessible. There's a large gap between research and real-world use, such numerical models need to be thoroughly tested for robustness before they can be deployed.

And according to experience, such studies are usually conducted simultaneously with Laboratory experiments, or already have Lab results they can compare with. If not, such study acts as a new source of synthetic MD data which can be picked up by the experimental folks.

I do agree that people who write such blogs tends to sell these ideas or studies as finished products which they are far from. The product of such studies are usually a paper or in other cases a patent. An idea others can build upon, like lego bricks.

iamleppert•5h ago
Carbon Fiber is the new Asbestos. Ask anyone who works with the stuff, and I wisened up after I used to print with Carbon Fiber PLA, one day I looked at my hands under a microscope and was horrified to see microscopic little carbon fibers embedded all over my hands. Washing my hands just spread them around. They were embedded deep in my hands, all over work surfaces and probably floating in the air. Horrifying!
potato3732842•5h ago
I haven't heard of carbon fiber itself causing much cancer. There's a little chatter about carbon nanotubes potentially causing cancer but that's more of a "this looks sus" thing than a "this def causes cancer" thing. I'm sure you could use CF with cancerous plastics or whatever but that seems like a stretch.

But then I realized people screech about asbestos far in excess of the actual risk it poses, and here someone is screeching about CF. So it kind of is like asbestos in that way.

Task failed successfully I guess.

blacksmith_tb•5h ago
I am not sure that's an entirely fair comparison, there's plenty of data on how dangerous asbestos is (if it's disturbed - lots of it is hanging around in walls etc. and not causing trouble... yet...) CF is less well-studied, though of course we have lots of carbon compounds in our bodies, unlike scratchy silicates, which might suggest it should cause us less harm. But it'd be good to have the research to confirm that.
vishalontheline•2h ago
Isn't this true for regular old fiberglass as well?

We often see people working with those materials wear protective equipment (full coveralls, breathing / eye protection).

lucas_membrane•2h ago
The durability and uniformity of carbon fiber makes it an attractive alternative material for mass-production of high-quality musical instruments. The difficulty is getting it to vibrate enough to sound like wood. Meanwhile, the prices of tropical hardwood instruments are becoming solidly prohibitive. The improvement described in this article, making carbon fiber thinner, lighter and stronger, may be significant in that market.