MurphyA/hacker-news huggingface dataset:
by I_dream_of_Geni | 2025-11-03 15:32:50+00:00
I was waiting to see in the comments EXACTLY this question: There is no way to dump this heat. 1000hp? Yeah, maybe for a few seconds, even with oil coolant pumping through there. Then how to dump the heat from the oil. And further thinking, if they ever get this to be a hub motor, how in the world are they going to pump coolant through 2-4 hub motors and then to a radiator that can dump that rate of heat rise, especially since oil is a lousy coolant (relatively speaking).
by ac29 | 2025-11-03 15:33:05+00:00
Yes, even thermal background noise (the noise level that exists even in complete absence of RF) would be expected to be above -140dBm. It scales with channel size and temperature.

As near as I can tell, the smallest subcarrier 5G can use is 15kHz, the thermal noise floor for a 15kHz channel at room temp (300K) would be -132 dBm.

My guess is whatever chip doing the measurement simply couldn't measure that low accurately, or it reports "nothing detected" as -140 dBm.
by madeofpalk | 2025-11-03 15:33:08+00:00
I don't think this article actually does a great job of explaining why Nextcloud feels slow. It shows lots of big numbers for MBs of Javascript being downloading, but how does that actually impact the user experience? Is the "slow" Nextcloud just sitting around waiting for these JS assets to load and parse?

From my experience, this doesn't meaningfully impact performance. Performance problems come from "accidentally quadratic" logic in the frontend, poorly optimised UI updates, and too many API calls.
by trashb | 2025-11-03 15:33:35+00:00
I wonder what the numbers look like if you compare pre-pandemic to now. To me it feels like during the pandemic companies found out they can fire a lot of people without a lot of backlash as long as they have a weak excuse. I feel like AI taking over jobs is such an excuse, especially considering creative jobs and the layers that are supposedly being replaced by AI in the article they call it "Creative roles that “execute” ".
by amluto | 2025-11-03 15:33:36+00:00
This discussion is all about vehicles with large batteries, but how about hybrids? With light enough and efficient enough motors, all kinds of designs might become practical:

- Toyota-style hybrid drives could be a lot lighter, and they don’t need large batteries.

- e-bikes with tiny batteries?

- Hybrid aircraft? What if there was a battery large enough for takeoff and landing, a small motor (or pair for redundancy) for cruising and to recharge the battery, and motors and fans or propellers wherever is best from an aerodynamic perspective.

- Power tools.
by troyvit | 2025-11-03 15:33:58+00:00
Syncthing is under my "want to like" list but I gave up on it. I'm a one person show who just wants to sync a few dozen markdown files across a few laptops and a phone. Every time I'd run it I'd invariably end up with conflict files. It got to the point where I was spending more time merging diffs than writing. How it could do that with just one person running it I have no idea.
by dragontamer | 2025-11-03 15:33:58+00:00
Batteries are the bottleneck.

Even if motors were literally weightless and mass-less, EVs would weigh more than ICE cars.

It's like making a more efficient CPU for your phone when all the power is eaten up by the cell-modem, screen and RAM. People wonder where the practical battery life gains are and theyre miniscule in practice
by catapart | 2025-11-03 15:34:14+00:00
It drops a buck fifty per motor. That IS a game changer.

It can make cars cheaper, or longer range, or faster, or any number of other designs based on what the manufacturer is looking for.

But to OP's point about flight - stacking 6 Tesla motors is not an option. Stacking 6 of these YASA motors? Much less weight.
by swores | 2025-11-03 15:35:14+00:00
> it's that or buy your own domain and host your own email.

Those aren't the only two options, there are two in the middle ground (and perhaps more that I'm failing to think of) that are well worth considering.

Option 1:

The best option IMO (what I chose, anyway) is to buy your own domain, and point its DNS MX records to a reliable email provider, which can even be gmail (though they're not who I chose).

That way you get almost none of the hassle of hosting your own email - it's very quick to set up the DNS records when you first get the domain, easy enough that even non-tech people can follow a simple tutorial, and after that you don't have anything to manage - and you don't need to worry about whether your emails will look trustworthy enough to avoid going straight into most people's spam folders (so long as you pick a provider that most of the world's email servers do tend to trust, such as gmail).

But if you do get locked out by the email provider you choose, you can point the DNS records at a different provider and not have lost your address. Obviously it's slightly more expensive than using gmail for free, but it's fairly cheap, affordable for many people (though not everyone).

Option 2:

Alternatively, if you need to stick to a free solution, you could create a free account at two different providers (let's say Protonmail and Gmail, or Hotmail and Yahoo, or...); have one of them as your primary email account, that you use like normal, but use the other one for signing up to accounts that would be a problem to lose ability to receive emails from.

Have the second account set up to automatically forward everything to your primary account. That way, when you need to click an email verification link, or open a password reset email, or whatever, it will have been forwarded to the inbox you use normally, so there's no extra hassle. But if you do lose access to your main account, you can still login to the account that receives the important emails to access them directly and to change it to forward to a new primary account elsewhere.

Of course there's still technically a risk that your important emails account could also be shut, but if you are only using it to receive emails from companies that you create accounts with, and you're never sending anything from it nor using it for any other services (ie not also using it for YouTube or similar) then the chances of losing access are almost as low as the chances of that business completely disappearing without warning.
by baq | 2025-11-03 15:35:27+00:00
as of today that's probably true, but if the labs manage to keep increasing the 50% time horizon (defined by METR as 'the length of tasks (measured by how long they take human professionals) that it can complete autonomously with 50% probability') at the current pace, it might not be for long. Exponentials are hard enough to forecast if you kinda sorta know the parameters, and we don't have that comfort today.
by whafro | 2025-11-03 15:35:42+00:00
As a long-time Sense user, this is great news for them!

However, their approach seems to (in my experience) completely fail to identify heat pump loads, and it hasn't yet picked up my EV charger (~month old, so I should definitely be more patient). At a grid scale, I'd think utilities would really want to see these sorts of loads, which likely dwarf a typical home's non-heating, non-ev electrical use entirely.
by mxkopy | 2025-11-03 15:36:07+00:00
They have some explicit examples of physics explainable by quantum gravity that resolve but are undecidable, n-body thermalization being one. Of course that’s given a sort of hand wavey understanding of quantum gravity, I guess one that they say should tell us whether a system thermalizes.

EDIT: I should also mention the idea that reality can tell us if a statement about a theory is true, given that the theory is an accurate description of reality. So if there’s an accurate Turing complete theory of reality, and we see some process that’s supposed to encode a decision on an undecidable statement being resolved (I guess in a non-probabilistic way as well), then we can conclude that reality is deciding undecidable statements in some nontrivial way.
by netdevphoenix | 2025-11-03 15:36:35+00:00
This looks quite concerning imo. We all know this is a bubble. When the transformer implosion happens, you can be sure that OpenAI will be ground zero. All these investors feeding OpenAI and all these adjacent companies exposing themselves to OpenAI will suffer huge losses. Everyone is chasing growth so hard that they are making questionable choices regarding returns from a far future that may never come. And let's be clear, the future that is going to pay this off is a future where this tech or a direct successor to this tech brings about a level of general learning skills and autonomy that should be pretty close to a third revolution. Anything else is massive loves for all of these companies.
by mamonster | 2025-11-03 15:36:50+00:00
Fair enough. Once you get into actual hours worked, you have a lot of people working less than FTE numbers by quite a bit.

For example, once the maternity leave runs out, in finance a lot of couples go to 80% so that with 1-2 days of home office you can always have someone watching the child. It's less money but the nurseries are so crazy expensive in Switzerland that it can actually even be positive in terms of total (edit:net) income.
by Aurornis | 2025-11-03 15:37:11+00:00
> It drops a buck fifty per motor. That IS a game changer.

You’re reading their marketing material. You have to think of this like all of those PR releases you’ve seen over the years about new battery technology that is 4X smaller or new hard drive tech that is 10X more efficient. The real world improvements aren’t going to be as big as their one lab test.

A Model 3 motor is already well under 150lbs, unless you start including ancillaries like the inverter and power transmission parts.

They’re not dropping “a buck fifty” from typical EV motors.
by netsharc | 2025-11-03 15:37:26+00:00
Cloud feudalism. The feudal decides what rules to apply, their reasoning is opaque and the protests of their subjects don't reach them. One day the feudal can confiscate all your possessions within his territory and banish you from his reign, for whatever reason. You can ask the feudal's henchmen for redress but they can ignore you or just tell you bullshit.

Sometimes protests that reach enough crowd get heard and the problem gets fixed...
by toast0 | 2025-11-03 15:38:14+00:00
> So you need to hot patch the running binaries. I don't really remember why it's not done in practice even though it's technically possible, I seem to remember the conclusion was that clustering (in whatever form) was the solution for high availability, rather than trying to keep a single machine running.

Most systems are technically capable of hot patching (if your exe file is mmaped, and you change the backing file, Bob's your uncle, unless your OS is no fun; which is why unix install pattern is unlink and replace rather than in-place updares). But most executables are not built to be hot patched, especially not without coordination.

Hot patching lets you make changes to your live environment with tremendous speed, but it also has risk of changing your live environment to an offline environment with tremendous speed. I'm a proponent of hot patching, and would love to be able to hot load all the things, but it has requirements and tradeoffs and most software isn't built for it, and that's probably the right decision for most things.
by alfanick | 2025-11-03 15:38:18+00:00
Is there a joke I'm not getting? Or is there some paper that I can read and understand this?

Reading the README and related link [0] I have no idea if this is some serious math concept that I never considered, or is it some sarcastic manifesto.

[0]: https://gist.github.com/mxfactorial/c151619d22ef6603a557dbf3...
by 0xbadcafebee | 2025-11-03 15:38:38+00:00
Also beware of having the owner for your Google Workspace be that of an employee who no longer works there. I was never able to fulfill all the "requirements" of Google support to get the Workspace back, despite the fact that it was linked to our domain... and we couldn't register a new Google Workspace to that domain. Ok, Google, I guess we just won't use your products, and we lose access to all our mail and files?
by PaulHoule | 2025-11-03 15:39:17+00:00
One could argue that the system and the policy of "deinstitutionalization" are at the breaking point.

The trouble is that under the current regime you have two classes of students and parents: if your child is "special" you can write to the state and the state will send a letter to the superintendant and light a fire under his ass. If your child is not "special" nobody cares what you think.

It's a regime where you don't have any rights unless you have a diagnosis so no wonder why the kind of wealthy parent who is highly "engaged" with the school is going to get their child diagnosed with Autism or ADHD or Dyslexia just to get an accommodation as simple as "being able to go to the bathroom whenever they want" (might be all you get!)

All the teachers I know come home crying sometimes from the moral injury of not being able to do right by their students, frequently they report being assaulted, often the bottom 5% of students in the class who are uneducatable cause problems for the teachers and the other students, nobody is sticking up for their rights.

Ithaca built a low-income housing development that literally casts a shadow on city hall, the police are called multiple times a day, there are multiple Narcan cases a week, arson attempts are routine, windows are busted out. Out of the 181 units most of the people are poor but able to live inside, there are literally a handful of people there who have severe mental illness who require involuntary treatment and probably commitment.

If we don't reverse deinstitutionalization we may as well give up on any investment in cities or community. No matter how much you spend on the bus people won't ride it unless they feel safe at the stop. If there are people screaming in the streets other people are going to order a private taxi for their burrito rather eat at a restaurant. They're going to shop at Amazon rather than a vendor that has a presence. They're going to move to the suburbs. They're going to vote Republican.
by embedding-shape | 2025-11-03 15:39:40+00:00
> I've never talked to anyone outside of tech circles like this that has any inkling that Google just shutters people's digital lives with no warning or recourse.

I thought I was specific enough but seems maybe I wasn't clear enough. I'm specifically talking about "outside of tech circles" (hence the "Even people who aren't computer techies"). I'm talking about acquaintances that works in retail stores, gas stations and similar, even these people seem averse to Google today when I've chatted with them about it for unrelated reasons.

Maybe it's because this is in Europe and people generally have more measured views of US companies, especially as of late? Not sure how it looks/seems in other parts in the world, but since I'm bound to one location, I definitely live in some sort of local bubble here like everyone else on this earth, not gonna lie :)
by big-and-small | 2025-11-03 15:39:41+00:00
It's have nothing to do with "figuring it out". Both mining and processing been figured out decades ago. But rare earth mining is disaster for ecology and western countries just don't want to pay the tall and deal with political consequences. Countries like China and Russia have advantage the they can do whatever they want without caring about protests or long term effects on population of regions where mining occurs.

There quite few talks on the topic, but you can check this one by Dr. Julie Klinger of University of Delaware:

https://www.youtube.com/watch?v=DGQeXrkCqM0
by znort_ | 2025-11-03 15:39:47+00:00
then there's the fact that this post (posted only 25 minutes ago) doesn't appear anymore on the news feed (albeit there being older postings with less upvotes), which shows me how much i can trust this site ...

then again i would admit that this news is kind of off-topic here, but still ... there's a difference between moderation and outright censorship. in the land of the free! i wonder if all these paid buffoons realize how poisonous this is and that it is backfiring.
by thelastgallon | 2025-11-03 15:40:02+00:00
No people to interact with. Only AI and automated systems. Engineers/PMs/leaders/etc are incentivized to develop something new (more bonus, RSU, promotions) and move on. Nobody gets rewarded to improve things already developed.

The Great Decoupling of Labor and Capital: https://www.mbi-deepdives.com/the-great-decoupling-of-labor-... explains this with numbers: Alphabet required 76k employees to get to their first $100 Billion. Their most recent incremental $100 Billion? Just 11,000! (assuming they add another 3k employees in 4Q’25)
by Lio | 2025-11-03 15:40:11+00:00
Not a game changer but I wonder if ligher motors allow you to do things like have one motor per drive wheel, removing the need for differential gearboxes?

Then you can do clever things with traction control without having to use the ABS system to brake the drive wheels.

Or dramatically change the turning circle on big cars and vans. Maybe even reduce the size and weight of the braking system by taking on some of that role.

All for the same weight budget.
by lproven | 2025-11-03 15:40:28+00:00
Neither. Because they are not aiming for:

> a free bug-for-bug compatible version

FreeDOS is significantly different from "real" MS-DOS.

Back in the 20th century I used DR-DOS, written by Digital Research, the company behind the original OS of which DOS was an unauthorised re-implementation.

(DR CP/M-86 was years late, so SCP wrote 86-DOS as a replacement. MS licensed 86-DOS and later bought it. It's not a clone: CP/M was in a compiled high-level language, while 86-DOS was implemented in assembly language, implementing a version of the same API on a different CPU ISA, using a different filesystem drawn from a separate pre-existing product.)

Until MS discontinued MS-DOS and IBM kept on developing it for a few more versions, IBM PC DOS and MS-DOS were near identical.

DR-DOS was a little different from MS-DOS. It had extra commands, used different syntax in the config files, very slightly different output and things -- but then, it was from the original vendor, so that was excusable, and mostly, it understood MS syntax as well.

FreeDOS is not like that. It's quite unlike any other version of DOS. It has differently-named config files, it lives in a differently-named folder with an internal structure, and it has a number of external commands with different names and different syntax. For example, one that threw me is that there is no `SUBST` command, but a different `SWSUBST` which combines the functionality of SUBST and JOIN.

In 21st century DOS terms, at best, FreeDOS is as different from MS/PC/DR DOS as Red Hat is from Debian. In fact it may be more like it to say FreeDOS vs OG DOS is akin to FreeBSD vs Linux.
by SAI_Peregrinus | 2025-11-03 15:40:50+00:00
RPis (and similar) are interesting because they're a tiny full-fat Linux computer with user-accessible GPIOs. That's the only special thing about them. There are other tiny Linux computers, but RPi-like computers have GPIOs, so they can use communication protocols that don't have standard external headers like I2C & SPI, switch relays, etc. They're interesting precisely because they can do what a microcontroller can do, while still being a full Linux system.

I mostly use them for situations where I'd otherwise need a small Linux computer and a microcontroller together, e.g. for CAN + DoIP simulation with SCPI control of test equipment over Ethernet & relay control of a vibration table.
Interview with the lead author of REFRAG (Meta)
by CShorten | 2025-11-03 15:40:59+00:00
I am SUPER EXCITED to publish the 130th episode of the Weaviate Podcast featuring Xiaoqiang Lin, a Ph.D. student at the National University of Singapore! During his time at Meta, Xiaoqiang lead the research behind REFRAG: Rethinking RAG-based Decoding!

Traditional RAG systems use vectors to find relevant contexts with semantic search, but then throw away these vectors when it is time to pass the retrieved information to the LLM! REFRAG instead feeds the LLM these pre-computed vectors, achieving massive gains in long context processing and LLM inference speeds!

REFRAG makes Time-To-First-Token (TTFT) 31x faster and Time-To-Iterative-Token (TTIT) 3x faster, boosting overall LLM throughput by 7x while also being able to handle much longer contexts!

This is such an exciting evolution for the applications of Vector Databases, and Weaviate’s mission to weave AI and Database systems together! I loved diving into the details of REFRAG with Xiaoqiang, I hope you enjoy the podcast!

YouTube: https://www.youtube.com/watch?v=yi7v-UXMg0U

Spotify: https://spotifycreators-web.app.link/e/RWvmvMgRZXb
by easton | 2025-11-03 15:41:04+00:00
Last week's Microsoft deal said Azure was still exclusive: https://openai.com/index/next-chapter-of-microsoft-openai-pa...

But that feels weird combined with this. You can buy OpenAI API access which is served off of AWS infrastructure, but you can't bill for it through AWS? (I mean, lots of companies work like that. but Microsoft is betting that a lot of people move regular workloads to Azure so they can have centralized billing for inference and their other stuff?)
by nyrikki | 2025-11-03 15:41:05+00:00
John McCarthy‘s qualification problem[0] relates to this.

While one can and will add invariants, as they are discovered, they cannot all be found.

Entscheidungsproblem and Trakhtenbrot's theorem apply here, counterintuitively that the validity of finite models is in co-re but not in re.

Validity in this case is not dependent by the truth of the premise or the truth of the conclusion.

Basically we have to use tools like systems thinking to construct robust systems, we cannot universally use formal methods across frames.

It is one way race conditions are complex.

Hindsight bias makes it seem easy but that is because that is in the co-re side.

Well intended actions with hindsight can often result in brittle systems as their composition tends to set systems in stone, with the belief that axioms are the end solution.

The fact that Gödels completeness theorem may not apply for finite systems when it works so well for infinite ones is hard for me to remember.

Remembering that axiomatization is a powerful tool but not a silver bullet has actually helped me more than I can count.

[0] http://jmc.stanford.edu/articles/circumscription/circumscrip...
by ceejayoz | 2025-11-03 15:41:32+00:00
Honestly, I think both are plausible. I think they put things in front of him, and he signs it (and there's video footage of this; https://x.com/ArtCandee/status/1882531252735242622); all this stuff about Biden's autopen running the show is projection. I think they've given him the ballroom project to keep him occupied.
by Yie1cho | 2025-11-03 15:42:08+00:00
the question is, what's your use case?

for me it's a family photo backup with calendars (private and shared ones) running in a VM on the net.

its webui is rarely used by anyone (except me), everyone is using their phones (calendars, files).

does it work? yes. does anyone other than me care about the bugs? no. but noone really _uses_ it as if it was deployed for a small office of 10-20-30 people. on the other hand, there are companies paying for it.

for this,
by catapart | 2025-11-03 15:42:52+00:00
I'm not reading anyone's marketing material. If you want to dispute the shipping weight, feel free to correct this website whom I assume charges for shipping based on weight [0]. I'm sure they'd love to know they have it wrong.

According to purchasable equipment, the Model 3 engines weight ~175 lbs. If that's wrong, that's on them for claiming it. Subtract 28 lbs from that and you're at 147 lbs. That is very close to 150 lbs.

[0] https://evshop.eu/en/electric-motors/295-tesla-model-3-drive...