skysight-inc/HackerNews huggingface dataset:
You can also price in the effort of maintenance that needs to be done before adding of a new feature. That may explain it better from the leadership perspective.
I probably wasn't clear. I don't doubt your first statement "The Top of the TOP500 machines are all liquid cooled."
My skepticism is your second statement "due to physics constraints".
It may very well be true but I'm just skeptical that it can't be done with a combination of engineering and ambient environment (mostly temperature but also a tradeoff between density and space).
May be I focused on the word physics too much (being a physicist),
but it seems the decision would basically be a cost-benefit analysis and risk management which involves many factors including money, maturity of solutions in the market, safety, etc.
For example, at NERSC, there are real risk of a massive earthquake long overdue
(the whole floor is quake-proof, but I guess the risk is reduced, not eliminated),
so I guess they probably have considered this in that design choice.

But perhaps you're right that the physics is the ultimate factor here:
what comes in must goes out. With order of magnitude scale of increase in power coming in,
water seems to be the most effective and cheap entity to absorb those heat and be transported outside the floor very efficiently.
Gas is cheap. $3.19 near us vs. $5.00+ a few years ago. Guess what happened when gas prices went up?
I should give it more love really.
Counting Time at London Zoo
Mandiant, the security firm Google bought for $5B, gets its X account hacked
>>"He wasn't. It was a very top-bottom initiative and that rarely works when culture is involved."

I work at a very large organization where the top is too scared to give any direction whatsoever, so it's middle managers and their lower staff henchman, that battle it out over major decisions with politics and schemes to get their preferred stuff implemented. It's more terrible than you can imagine, I never seen a more chaotic place.

So, I just want to say top-down management isn't the worst thing. I'd prefer that to no top down management at all.
Show HN: Pro Feed – One Tool. Multiple MS Teams
The private beta has ended. We are looking for beta testers :).

Also: Works on mobile now as well.
Navajo nation asks NASA to delay moon launch over plan to bury human remains
Looks like you accidentally pasted the content of what seems like an SMS with a login code. I'd delete that ;-)
Must be very niche as lasers operate typically below 10% efficiency. And one speck of dust or defect on a component and you're setting fire to something.
An OCaml Hardware Domain-Specific Language for Efficient and Robust Design
Talked about this in other times (through other links):

* https://news.ycombinator.com/item?id=8533843 [2014]

* https://news.ycombinator.com/item?id=28491562 [2021]

* https://news.ycombinator.com/item?id=25902615 [2021]

* https://news.ycombinator.com/item?id=34050715 [2022]

A commentary about the code https://news.ycombinator.com/item?id=22831931 [2020]
The Oxygen Bottleneck for Technospheres
You phrase your comment as if that doesn't work.

The fact that I have a (mostly unused) guestroom absolutely does increase the number of guests I get.

The fact that I have a mountain bike (mostly used for commuting) absolutely does increase the amount of mountain biking I do.
>the biggest knRecopiez le code 53587468 pour accéder à vos comptes Caisse d'Epargne. Si vous n'etes pas à l'origine de cette demande, contactez votre agence.own sea creature at the time

I think you accidently hit control-v in the middle of a word
There is a Wikipedia article on applications of superconductivity. Everything we already use superconductors for will potentially become easier, cheaper or practical.

https://en.wikipedia.org/wiki/Technological_applications_of_...
I think I would do a donation if I use it
Lawyer here. This is right. Unlike some of the typical software use cases, md5 is usually not the only thing stopping you from falsifying evidence.

The records being produced almost always exist and the hash is being used to differentiate which is which and whether you got are correct copies.

If evil litigant produces fake documents instead of real ones, and you can't get access to the system they came from, no hash will save you - they can produce any hash they want and you can't verify against an original.

If you can verify against the original, forensics isn't going to look at a hash and say "hash matches my job is done".

Most of the time what matters is whether the evidence exists or not.

The tobacco companies lied and claimed they never had any evidence in the first place.

assume instead they wanted to falsify the data to say that as far as they could tell smoking did not cause cancer.

this is not a hashing problem. This is a problem of making up fake studies that look real.
Infrastructure is there, people just have a fixed notion of what the infrastructure looks like.

Even our least populated states are littered with fast chargers alone highways and interstates.

When I bought my model 3 in 2018, infrastructure was good enough in Idaho the meet my needs, though there were a few tight gaps.

Now in 2024 the picture has dramatically changed with every route having excess charge capacity and options.

Those down on EVs are having to come up with ever more convoluted scenarios and routes to justify why they aren't feasible. I literally saw one where a person posited they needed to drive from Edmonton to Winnipeg Canada every day during the winter and because an EV is a bad fit for that situation it's a bad fit for everyone.
I think both ICE and electric motorcycles will be more energy-efficient than both ICE buses and electric buses. But not everybody can ride a motorcycle, so my thought is that if more car drivers became motorcycle riders, then traffic would flow much better and the bus wouldn't get stuck in the first place.

It would also save a lot of money on infrastructure, if traffic could be improved without having to build larger and larger highways.

As for electric and muscle bicycles, I think they have their time and place. There's nothing wrong with people combining all methods of transportation in their life, depending on circumstances and weather. Car + MC + Bicycle could be in everybody's garage.

I wouldn't consider many motorcycles a safety hazard. It's mostly people riding like lunatics. And safety gear has become better recently, with airbag clothes. At least bikers only hurt themselves in an accident. In my experience motorcycles are safer than electric bicycles, unless you're in a place with very good bicycle infrastructure. Motorcycles can accelerate out of dangerous situations and have better manoeuvrability than large-wheeled bicycles.
Pydlpack: Python library for exchanging data between different array libraries
I take your (or the worm's) bank account access was not meant to be in this comment?
For glass fiber, that would be 1700C, but you'd need to be very worried about any damage if you're anywhere close to that
If you are hitting 100 miles range, then you do indeed have such a small range you need to hyperfocus. A modern Y or 3 will always do 200 miles without a threat. I charge to 70%, and I wouldn't even top up before doing a 100 mile rountrip.

Which goes back to.. more range REALLY DOES help. 100 vs 200 miles range is game cahnging. 200 to 300 would be huge for road trips. 400, 500, starts to hit some diminishing but non-zero returns.
Cognitive maps in brain regions are compressed during goal decision-making
Ok, I was incorrect there. I was thinking more about industrial application potential. There are some cuprates which are SC above -196C, there are some materials which are SC there under some enormous pressure and so on. They are not quite useful for us today, and the research in them is slow. As soon as someone will create industrially applicable SC with LN temps it will be a world revolution, in medicine first of all, then in research and maybe electronics etc.

But my point was not about the old inventions, but about this new PCPOSOP material. Researchers claim an insane jump to -23C (maybe) superconductor which is highly suspicious on it's own. It's like some researchers will claim they have discovered some material with a melting point of +10000C at 1 atmosphere. Sure, maybe. But the fact that materials with melting points between +4000C and +10000C are missing is super suspicious.
On the pickup truck example — maybe the person only buys mulch a few times a year, but the person has the capabilities of the truck all year. When I lived in the U.S., I had a home backup generator. Only really become useful once or twice, but when it was useful, it was extremely useful. Certainly one could instead rent a generator right? Except you don’t necessarily know when you’ll need it and that’s assuming there are even places from which to rent when you need it.

A pickup truck is a vehicle you can use every day that also has the capability of additional utility — you don’t lose everyday utility because it’s a pickup truck, but you have additional utility that’s there when you need it.

Why do most people own suitcases? Why not rent those when you need them? Why do people own skis? Or anything else that has occasional use?

In Spain, I drive a big diesel van. When I bought it, many commercial vehicle dealerships were pushing the electric version — for my daily driving which involves transporting motorcycles to the race tracks roughly 1.5 hours away, an electric would work, but the 10 times per year I have to drive across Spain for races, electric would be a nightmare — drive several hours, potentially towing a trailer then having to stop for hours to recharge? That turns a one-day 9 hour drive into a two day drive. Barcelona to Jerez for example. That also assumes that chargers are ideally spaced along the route and that time while I’m waiting for the van to charge? That’s wasted time. Then there is the matter of daily charging — parking in the Barcelona area, especially for a van isn’t easy. And finding a charging spot available that’s close to home would be an exercise in luck. Even if there were an order of magnitude more chargers, there’d presumably be an order of magnitude more EVs to compete with.

Then there is the question of weight — a large van requires large batteries which makes the weight of the vehicle substantially more than diesel — that means either a bigger vehicle is required or I get less payload. And driver licensing is based on weight.. so the EV version of my Crafter van would either mean I carry less (not an option,) or I have to move up to a higher weigh class which would require a commercial license.

While my personal situation is an “edge case,” the fact is that everyone’s life consists of their own version of edge cases. That’s the point of the free market — we can optimize around our own edge cases. The problem is when do-gooders are reductive, trying to fit everyone into a box based on what they think their needs should be rather than what they are.
Apple Fitness+ offers more ways to stay active and mindful in the new year
Love ‘em.
Cars used to weigh half as much and make their own electricity. Repair costs are exponential on EVs compared to normal cars.

I can fix a car with a carburetor with analog parts, that I can machine myself.

It does not require an electric drive-train and battery to have back up cameras, tablets, even self-driving.

EVs are priming us for micro-transactions in our vehicles that we do not actually own.

So maybe the ecological impact makes sense, but the financial does not.
>They must know this. They also must know it will be harder to hire new people. They know this, right? Please someone tell me so.

What time horizon are you thinking? People will forget '22/'23 layoffs very quickly. This is especially true if you made it through these last years, the market picks up and you want to move.
I've had an EV since 2019 and did a few longer trips, including outside teh normal charging networks and I only had to wait fun line twice. It IS annoying when it happens, especially when I was in the middle of nowhere and the charger was being used by a pluggable hybrid
Thanks for that. I'm not dabbling in writing, but I love to hear the thoughts of people behind that.
This applies to third-party cookies, right? So why does the article say "Killing Cookies" instead of "Killing Third-Party Cookies"?
What are you arguing? What's unfree about the section of the knives market relevant to the example? The government isn't forcing/incentivizing them to buy the cheaper products. Economic considerations are.
I think that sometimes when humor is added, in this way, it is to make you pause first.

At least in my mind when I encounter something oddly said/written my mind starts suggesting contexts and I can clearly "see" myself going blind by doing me like things.
Tesla will 100% route to Tesla chargers, which is what you want to use right now. Maybe in 5 years it will be worth thinking about other brands.
FYI: For EU, https://digitalscience.pinpointhq.com/en/postings/c9b9210f-1... states that:

> Please note this role is currently only open to candidates in Germany, Spain, Romania, the Netherlands or Denmark.
You should have access to the supercharger network by then. It is amazing compared to the patchwork mess that is everything else.
It all depends on the structure of the organisation, and how well managed it is.

Imagine an organisation where developers are adding features to the service, where each new feature uses $1000 of disk space and enables $10,000 of new sales.

And imagine the sysadmins buy huge file servers, each new file server costs $500,000

In a highly bureaucratic organisation, the sysadmins will cross-charge the developers for disk space, and they'll already have the money ready when a new file server is needed.

In a well run and less bureaucratic organisation, the bosses will realise that $500,000 bill enables projects that will return $5M, so they'll gladly pay it.

In a poorly run organisation, the bosses will blanch at the $500,000 bill because it's expensive and not linked to a project; the sysadmins will ask the next person who needs $1000 of disk space to pay $500,000 for it (they'll refuse); then the sysadmins end up having to refuse requests and cajole developers into only keeping 3 days of logs instead of 7 to free up disk space. Before you know it, the bosses are hearing bad feedback about the sysadmins...
These are the scenarios I was looking for. Thank you.

The extreme event scenarios have pretty obvious applications but are also very rare.
I'd really like to see a plug-in hybrid pickup where I can do 10-20 miles on a charge without needing the gas engine to even kick on. I get that by the time you put all that infrastructure in, an engineer starts asking why we don't just omit the ICE and add batteries for range... but I think there is an unmet need. That would allow me to do at least 50-70% of my miles all electric.

I do quite a lot of truck stuff: 2-3 major construction projects a year, gathering / transporting multiple cords of firewood at various stages annually, commercial landscaping, driving forestry roads for engineering work and hunting, etc. And I have a motorcycle that works a lot of the time for commuting needs. BUT, I also have kids and so I do end up needing a passenger vehicle, a need which is unfortunately filled by my truck since my wife has to also commute.

There is no way an electric vehicle would allow me to do the stuff I do. My truck offers 385 miles of range, and I usually carry enough extra fuel to get double that when I go into some extremely remote locations where there will simply NEVER be charge infrastructure. And I absolutely need it sometimes. I saw some poor guy driving that road get stuck in a Tesla out in the middle of nowhere. Not sure what that guy was thinking but he ended up getting towed out after failing to get a charge off of a gas generator after running it for 8 hours. It's bad fire country out there and he's very lucky that wasn't a concern at the time.
> We need expensive gear

(used only once, could have been rented much cheaper)
The post says it

> can provide 3v 180mA from 1.5W

0.18×3=0.54W, so like ⅓ efficient. Maybe that's why it's so expensive compared to other modules which can get away with lower efficiencies?
Its like the chris-chan phenomenon: Who is worse, the person the blog is focused on or the people obsessed with them?
Well rare disease is also an economic desert.
Its only because of Government regulation big pharma started to care about these.

Mainly the Orphan Drug Act of 1983 with provided tax incentives as well as subsidized research. There is also the Rare Disease act of 2002 but that IMO is less signifigant.

Don't forget that for rare diseases affecting children the government awards fast track vouchers. These allow you to shorten the approval time of another drug (or sell it for a few hundred million for another company to do the same.

See:
https://en.wikipedia.org/wiki/Orphan_Drug_Act_of_1983
https://en.wikipedia.org/wiki/Rare_Diseases_Act_of_2002
https://en.wikipedia.org/wiki/Priority_review
5 years ago I spent 20K on a second hand Merc that I love driving. At the time, hybrids let alone electrical were way more expensive than a diesel car.

I'll be damned if I have to spend 50K on a car that doesn't even get me to the south of France in a day. Yeah, I only take long road trips a few times a year but if I do, I want to be able to do it in my expensive car.

It's like buying a top spec macbook pro but if you want to edit video even once or twice a year, you got to rent another computer.
> By the time I arrived at Brooklyn’s Park Slope farmers’ market in search of a pawpaw one morning last week, it was already too late: The weird green fruit had sold out within an hour. “You have to get here early,” Jeff Rowe of Orchard Hill Organics, the market’s lone pawpaw vendor, told me.

> [...] Rowe, the farmers' market vendor, said he's constantly selling out of pawpaws.

He is very clearly selling too cheaply?
A friend recently mentioned to me that there are pawpaws in a park near our house in DC. According to him, someone may have planted them and now they are growing wild. It seems odd that this fruit would grow in the woods since there isn't much sunlight there. I will have to go check it out (when they are in season I guess?).
Reaction: Is non-science reporting much better these days? If "not really" - then the problem is upstream, and you should trace it back...

...assuming that you care about fixing it. Or just about your readers really understanding the problem.

Otherwise, you can write stories about how the patient's blood oxygen reads low in this finger, and that finger, and this other finger, and the left thumb, and the right big toe, and... That'll add up to a whole lot more clicks.
“A cryptographic hash should uniquely identify a file.”

This is not true. It’s not possible to guarantee this. One can be certain that two files DON’T match if they have different hashes, but one cannot be certain that two files DO match based ONLY on the fact that they have the same hash.
> So they want to sleep at your place but are not comfortable having you around?

Yes, this is extremely common. All of my in-laws would go in this category, more or less. I might spend the night at their house, but it would be awkward to wake up with them in the room. Many friends who have moved far away and I don't see them regularly any more would also qualify.

> And if they have back pain they can't sleep on just any mattress either

There is an enormous population that exists between "can't sleep comfortably on a couch" and "needs some specific kind of mattress."

> an entirely unused room

Space isn't at a premium where I live, a whole unused room is no big deal. Plus if I have a another child there is a room ready for them.

That's the source of a lot of guest rooms, they are rooms for future/past children. My own guest room is also an office when there aren't guests.
I hold my breath every time- because one of these times is likely to be the one.

There's no reason to believe room-temperature superconductivity is impossible or hard.

It could end up being trivially easy in the end.

https://www.eyeofmidas.com/scifi/Turtledove_RoadNotTaken.pdf
> In 20 years and several different companies I have always heard this but never agreed with it.

Do you mean your companies didn't act like maintenance was last on the list, you didn't agree with descriptions that said they would?

Or they indeed did, you just didn't agree this was appropriate, you thought they were acting inappropriately?

Because you seem to be describing environments where indeed maintenance was not valued by the business -- you just didn't like it. So to "say maintenance is not valued by the business" is just to describe reality, like you in fact just did.

I think the common saying that "maintenance is the last on the list" is not meant to be a prescription, advocating this -- it's a description of what seems to happen. Analyzing why and if there's a way for a different approach to be better for the business is not something OP engages in. One would hope so if one, like you, values things working and being high quality... but if very vew companies act this way, there's probably a reason regarding alignent of interests...
Recell already sells trimmed down packs for Tesla models. It provides a cheaper option for fixing higher mileage vehicles.
I believe the whole thing can be done in 0.3 seconds with the following approach:

(Describing only the 'happy path' here - other paths can be made fast too, but will require different implementations)

* Since temperatures are only to 0.1 decimal points, we have a finite number of temperatures. ~400 temperatures will cover all common cases.

* We also have a finite number of place names. (~400)

* Just make a lookup table of all temps and all place names. (~160,000)

* autogenerate a state machine that will map each of the above 160,000 things, at any rotation within a 4 byte register, to a unique bin in a hash table. The state machine will have one 32 bit state register (16 bits to output, 16 to carry over to the next cycle) where every cycle a lookup in the state transition table is done, and the next 4 bytes of data XOR'ed on top.

* run through all the data, at RAM speed, incrementing counters for each state the machine ends up in. (there will only be 65k). These counters fit fully in cache.

* With just 32 bits of state, with AVX512 we can be running 512 copies of this in parallel if we like, per core! AKA, compute will not be the bottleneck.

* from the values of the counters, you can calculate the answers. 65k is a far smaller number than 1 billion, so you don't need to do this bit fast.

* for anything that doesn't map to a valid bin (higher/lower temperatures, unknown place names), just fallback to slow code (one state of the state machine can be reserved for 'escape to slow code'. Use these escapes for min/max handling too, since it will only happen a few thousand times).

* I think this approach can operate at RAM speed with just one core with AVX512, so no benefit in splitting across cores.
I couldn’t agree more. Another recent example:

Statisticians: German GDP decreased slightly in Q3.

Journalists: Germany in recession due to only producing last century technology.

A truck driver in middle Nebraska: I switched to an electric truck and it costs me 30 minutes extra per day due to charging.

Journalists: Electric vehicles are costing our workforce millions of hours per year.
https://en.wikipedia.org/wiki/Asimina_triloba

> This article is about the common pawpaw of eastern North America. For the unrelated tropical papaya fruit often called 'papaw' or 'pawpaw', see Carica papaya.

https://en.wikipedia.org/wiki/Papaya

> This article is about the papaya. Not to be confused with the South American Mountain papaya or the Eastern North American "pawpaw".

https://en.wikipedia.org/wiki/Mountain_papaya

....

Huh, TIL! I thought they were the same thing.