MurphyA/hacker-news huggingface dataset:
by lucyjojo | 2025-09-02 16:42:50+00:00
there are waaay less cars than people in tokyo.

most people do everything via public transport and/or bicycle.

https://stats-japan.com/t/kiji/10786

i mean none of the supermarkets close to my home have parkings... (they have a bunch of bike racks though).

there is 1 combini with a small ~6 spots parking that sits mostly empty. my building has more units than parking spots, there are a lot of bikes though.

in tokyo, having a car is not the default, you need a good reason.

now if you get out of tokyo (like gunma), it's another story, in japan they talk about "car society" (kuruma shakai). you'll see lots of cars, and big parkings.
by jacobgkau | 2025-09-02 16:42:59+00:00
You got downvoted, but anyone who's used Imgur within the past decade or so has to have seen indications of this. I remember around 2016 when I went to upload some photos for a Reddit post, I found the two different profiles (old-style and new-style) confusing. I could post something private on the old profile or the new one, but if I wanted to bring a post from the old one to the new one, it would get set to public, and also re-post it with a new timestamp... things like that.

Once Imgur stopped being a dedicated image hosting service, you had to go out of your way to lock down your posts if you wanted to use it as a dedicated image hosting service. Which I can see being confusing for both sides of the party.
by tptacek | 2025-09-02 16:43:13+00:00
I'm early into Calc II right now (MathAcademy's equivalent of it), having started 6 months ago at a D-student's level of Algebra II, and I'm curious what the "right" calculus to learn would be.

It's pretty clear to me as I work through problem sets that I'm never going to do any of this hand-computation in reality, in the same way that nobody computes eigenvectors by finding the roots of a characteristic equation. It's still fine by me, for 2 reasons: (1) because I'm doing this to replace the New York Times Crossword with something productive, and it's great for that, and (2) because every time I get annoyed at like messy trig derivatives with double-angle substitutions and stuff, I instead pivot to learning how to solve it with Sage Math, and so I get better at that instead.

But if there's a smarter sequence, I'm super interested!
by robert0z | 2025-09-02 16:43:23+00:00
If we could all recognize that our money is the power, then we could all come together and not purchase things that are not for our interests. For example you see that chocolate that is 50 dollars a pound dont impulsively buy it because you love it so much, if you don't buy things that are unreasonable than they don't try to sell you things that are unreasonable.
Show HN: Sudo – AI monetization infrastructure for developers
by ventali08 | 2025-09-02 16:43:41+00:00
Sudo — AI monetization infrastructure for developers

4 months ago, I kept running into the same problem building AI products: inference is expensive, subscriptions are blunt, and ads weren’t designed for generated content.

So I started working on Sudo, an infrastructure layer that makes it easier to launch and monetize AI apps.

⸻

Key features (in beta now): • One API to route across top models (no vendor lock-in) • Real-time metering & billing (usage-based, subscriptions, or hybrid) • Optional AI-native ads — contextual, developer-defined, and personalized • Dashboard for tracking usage, revenue, and margins

You can try it here: https://sudoapp.dev Docs: https://docs.sudoapp.dev Discord: https://discord.com/invite/UbPf5BgrfK

⸻

We’re giving early testers 10% bonus credits for the first month.

Would love feedback — what feels clunky, what’s missing, and what would make this a true drop-in for your projects?
by tripletpeaks | 2025-09-02 16:43:48+00:00
Limit options. If the only, say, film options are five movies they’re resistant to watching, it’ll take very little time for them to break down and try one.

You do also have to restrict plausible substitutes, like if you do this with movies you need to either cut off or do a similar thing with video games.

Worst case, they don’t try the things you presented, but do go outside. Oh no, what a tragedy, lol.
by jacobolus | 2025-09-02 16:44:12+00:00
For a more conceptual introduction leaning on using computers, whose goal was getting STEM students up to speed to understand the context of work in their various fields, you might enjoy https://www.science.smith.edu/~callahan/intromine.html

For something more traditional, take a look at textbooks by Piskunov, Courant, or Apostol. Spivak's Calculus has excellent problems if you are looking for something more abstract and rigorous (probably better after a first course). https://archive.org/details/n.-piskunov-differential-and-int... ; https://archive.org/details/ost-math-courant-differentialint... ; https://archive.org/details/calculus-tom-m.-apostol-calculus... ; https://archive.org/details/introductory-calculus-book-colle...

Finally, if you want a strategy for those tricky integrals, per se, take a look at Schoenfeld's "Integration: Getting it All Together", https://files.eric.ed.gov/fulltext/ED214787.pdf ; some results of teaching the solution of integrals by this method were presented in https://www.jstor.org/stable/2320344
by mallowdram | 2025-09-02 16:44:21+00:00
Engineers are so close-minded, you can't see the freight train bearing down on the industry. All to science's advantage replacing engineers. Interestingly, if you dissect that last entry, I've just made the case measurement (analog computation) is superior to counting (binary computation) and laid out the strategy how. All it takes is brains, or an LLM to decipher what it states.

https://pmc.ncbi.nlm.nih.gov/articles/PMC3005627/

"First, cell assemblies are best understood in light of their output product, as detected by ‘reader-actuator’ mechanisms. Second, I suggest that the hierarchical organization of cell assemblies may be regarded as a neural syntax. Third, constituents of the neural syntax are linked together by dynamically changing constellations of synaptic weights (‘synapsembles’). Existing support for this tripartite framework is reviewed and strategies for experimental testing of its predictions are discussed."
by FirmwareBurner | 2025-09-02 16:44:42+00:00
>But he's definitely not a neutral actor so who knows.

Which other billionaire media moguls are neutral actors? Rupert Murdoch? Ted Turner? Jeff Bezos?

None of them are, because the value of media is based on its ability to control public opinion and influence elections. Otherwise none of the guys I mentioned at the top would be in that business.

"If you don't follow media you're uninformed, if you do you're misinformed."
by dlcarrier | 2025-09-02 16:44:54+00:00
Normally that's fine, because the tab stop points to the next field. That's the whole point of tab stops― you place them at the beginning of fields on a forms. (Yeah, you also need to be on the right line, so a single key press rarely gets you there, but we were working with purely mechanical controls.)

Where it goes off the rails is when we embed a user interface inside another user interface. That's not a problem specific to the tabulator, but also with all novigation functions, like home, forward, and back.

I rarely use web-based email interfaces, but when I do, I accidentally send half-written email messages, because I'm trying to use a block quote or something similarly indented. It's especially bad when the next field is the 'Send' button, and pressing the spacebar sends the message.
by 0xTJ | 2025-09-02 16:45:30+00:00
It's not necessarily just about remembering every rule and trick you can use to simplify and solve integrals. Calculus is fundamental to understanding problems, from basic exercises in a first-year undergraduate physics course to entire fields.

You'll (probably) never apply the ability out the kinetic energy vs. time of a ball rolling down a hill, but these exercises build understanding of the tools. Derivatives are everywhere in a fundamental electric circuits course, you need to have an intuitive understanding of basic calculus. The relationship between current through and voltage across ideal inductors and capacitors are directly described in the language of calculus, even if you're not "using" the calculus substitutions you learned each time you analyse a circuit.

And good luck getting through a couple weeks of an introductory quantum mechanics course without using calculus as a fundamental building block. You can solve many of these problems with computers, but it's not going to build intuition on how to approach future problems. (I don't mean this as a joke or picking an arbitrary complicated-sounding topic; this is a core course in some engineering programs.)

Many engineering problems have nice closed-form equations (at least to get approximations). Obtaining those equations often involves calculus, and someone has to do that in the first place.

(I'm giving examples from the lens of my education, but each field of science, engineering, and mathematics will have their own context, and will vary from little-to-no calculus to being all-calculus.)
by YetAnotherNick | 2025-09-02 16:46:36+00:00
> The company said its run-rate revenue has increased from around $1 billion at the beginning of 2025, to more than $5 billion in August.

So 10% of valuation for 1.5% of revenue, which grew 5x in last 6 months. Doesn't seem as unrealistic as you put it, if it has good gross margin which some expects to be 60%.

Also Google was valued at $350B when it had $5B revenue.[1]

[1]: https://companiesmarketcap.com/alphabet-google/marketcap/
by trod1234 | 2025-09-02 16:46:39+00:00
I was lucky enough to have several teachers that were able to undo a lot of the damage bad math teachers imposed on me (on a lag) and continue on from Calculus to the foundations of mathematical systems (Abstract Algebra).

I've also used that knowledge quite a lot since, both in reasoning about problems and its also been beneficial in the confidence of accuracy in the methods of problem solving.

Bad malicious teachers nearly tortured math out of me. Without a substitute teacher who retired due to malicious politicking of his pears; but who had a phd in Mathematics Education, and was able to narrow in on exactly what I was taught that was incorrect (3 classes prior to the one being taken); and the patience and technique he used to destructively correct the false teachings while alleviating the operant conditioned anxiety; I wouldn't be where I am today.

There's quite a lot of malevolence in the world based in blindness, fortunately there are also some good souls out there helping elevate others.
by mapt | 2025-09-02 16:46:41+00:00
Continuing to carve out economies of scale in battery + photovoltaic for another ten doublings has plenty of positive externalities.

The problem is that in the meantime, they're going to nuke our existing powergrid, created in the 1920's to 1950's to serve our population as it was in the 1970's, and for the most part not expanded since. All of the delta is in price-mediated "demand reduction" of existing users.
by growingkittens | 2025-09-02 16:46:49+00:00
Organizing all knowledge requires a flexible system of organization (starting with how the categories are organized and accessed, not the data).

Random thoughts about organizing knowledge:

- Categories need fractal structures.

- Categories need to be available as subcategories to other categories as a pattern.

- Words need to be broken down into base concepts and used as patterns.

- Social information and context alter the meaning of words in many cases, so any semantic web without a control system has limited use as an organization tool.
by yjftsjthsd-h | 2025-09-02 16:46:50+00:00
> For example, he has had to maintain various Guile dependencies, and deal with the fact that Guix uses ""fairly old"" GCC versions whereas Debian usually ships the latest GCC version available for a given release.

It's odd that guix is both rolling release but also uses older GCC versions; usually I'd expect those from very different cultures.
by thethethethe | 2025-09-02 16:47:01+00:00
Nit: grasses are a distinct genetic lineage, the Poaceae family. There are a few other linages outside of Poaceae that have convergently evolved to look like grasses, sedges and rushes, but they all fall in the same clade, Monocots.

Trees, on the other hand, are a growth habit, exhibited by species in a wide variety of plant families, even grasses (e.g palm trees).
by Qem | 2025-09-02 16:47:04+00:00
> Rising sea levels aren't new, it's ancient. Buying coastal properties always carries risk.

40% of the world’s population lives within 100 kilometers of the coast[1]. If one person makes a bad purchase of land, the problem is theirs. If 3 billion people make bad purchases of land, that's a problem for everyone in the world.

Probably we can't blame most of those people for much beyond being born where they were.

[1] https://www.un.org/esa/sustdev/natlinfo/indicators/methodolo...
by hombre_fatal | 2025-09-02 16:47:04+00:00
Not necessarily since they have to do with the inherently complex niche features like unified server/client rendering (e.g. RSC, streaming SSR with selective hydration, server actions).

Next.js is essentially the reference and test bed impl.

Where people go wrong is thinking they need to default to the inherently complex niche feature of client hydration which is a niche optimization enabled by a quirk of web tech.
by toast0 | 2025-09-02 16:47:24+00:00
I think for a lot of people, their deeded land is in eventually in terms of lat/long, and if the water swallows their land or their land falls in the sea, they're pretty much SOL. Depending on the rules of their locality, they may keep ownership of the land that's now underwater: it may effectively cease if underwater land is not subject to private ownership, or it may continue but not be of value because you may not be able to exclude other people from the land (or the waters above it) or develop it.

For some though, the deed may be defined in terms of the coastline, and then they're going to have an interesting legal battle. But this isn't without precedent; coastlines and waterways change and things defined against them adapt.
by noleary | 2025-09-02 16:47:25+00:00
Ontario Teachers' is a pretty active principal in venture/growth financings and a major LP to a bunch of funds. That said, venture/growth is a pretty small percentage of their holdings.

---

[1] https://www.crunchbase.com/organization/ontario-teachers-pen...

[2] https://www.otpp.com/en-ca/investments/our-investments/teach...
by pmontra | 2025-09-02 16:47:46+00:00
Of course it takes some heuristic to jump to the definition of these common Rails idioms

belongs_to :customer # class Customer after_save :do_something # method validate :custom_validation # method

or a Ruby send(:method, arg)

But an IDE specialized in Ruby can do it. No idea if RubyMine does it.

Bonus for handling

send("method_#{var}".to_sym, arg)

In general it can only present a menu of choices: all the methods with a name starting with "method_"
by the_af | 2025-09-02 16:48:14+00:00
> There is no such thing as "the best engineers." Some engineers are definitely better than others, but once you pass the bar of "really smart, great work ethic," the tech tree diverges pretty dramatically.

Sure, but I don't think that's the point of the article.

The point of the article is that startups always claim they only hire "the best" (by whatever metric), but they actually don't, because they cannot pay for the best, nor accommodate their needs and opinions.

They actually want "good enough" engineers, not "the best". Again, the precise definition of "best" is not the point; we all agree it varies (though there are some common elements to all the best engineers).

Far from being upset by this, I'm thankful: I know I belong with the "good enough", definitely not the best :)
by DebtDeflation | 2025-09-02 16:48:20+00:00
The wildest part is that the frontier models have a lifespan of 6 months or so. I don't see how it's sustainable to keep throwing this kind of money at training new models that will be obsolete in the blink of an eye. Unless you believe that AGI is truly just a few model generations away and once achieved it's game over for everyone but the winner. I don't.
by j_w | 2025-09-02 16:48:41+00:00
My issue with "living wage" calculations is that they never compromise. I live in a county with great public transit. The living wage before taxes is listed as 61k for a single adult. Over 9k of that is allocated to transportation costs. Did I mention the great public transit? All of the buses are free.

Internet + mobile is 1500? Well gigabit fiber + mint mobile would run you 1200/year, so where is the extra 300 coming from?

American consumers are unwilling to tighten their belts for long term gains, and it shows. The comment you replied to mentioned r/FIRE - a lot of people on that subreddit don't have insane incomes, they just live well below their means.

This isn't to say it's not hard: it is. We live in a consumerist society and going against that is not easy. Having a low wage job is not easy. But saying the cost of living is as high as the livingwage site says is just not true. Their methodology is to obtain data from expenditure statistics - the problem is the average American is way too into consuming and spends beyond their means.
by manveerc | 2025-09-02 16:48:51+00:00
Many SPVs were available for recent funding rounds, but my biggest gripe was the excessive fees layered on top of them.

More importantly, we should ask who will be left holding the bag when this bubble bursts. For now, investors are getting their money back through acquisitions. Founders with desirable, traditional credentials are doing well, as are early employees at large AI startups who are cashing out on the secondary market. It appears the late-stage employees will be the ones who lose the most.
by gadders | 2025-09-02 16:48:55+00:00
My original point was that it is easy for people to advocate for the government to take people's property away, when they have no property of their own or no skin in the game.

My other point was just a wider one on moral hazard, and if it applies to coastal property (in that people bear their own costs) should it apply to EG obesity (where people should bear the cost of healthcare issues). If not, why is property a separate case?
by CrossVR | 2025-09-02 16:49:42+00:00
Now you're getting to the heart of the thought experiment. Because does it really understand the code or subtext, or is it just really good at fooling us that it does?

When it makes a mistake, did it just have a too limited understanding or did it simply not get lucky with its prediction of the next word? Is there even a difference between the two?

I would like to agree with you that there's no special "causal power" that Turing machines can't emulate. But I remain skeptical, not out of chauvinism, but out of caution. Because I think it's dangerous to assume an AI understands a problem simply because it said the right words.
by mrandish | 2025-09-02 16:49:47+00:00
> this assumes you are actively building and maintaining your network.

Frankly, being a consistent super-star engineer on a team of good engineers, is more important than actively maintaining a network. Experienced founders ask everyone in their small circle of long-time, highly credible, proven associates "who's the best engineer you've ever worked with?" If the answer is interesting, they follow up with "Where are they now?

In my startups, I recruited nearly all of the star engineers this way. In most cases, getting them on board required significant sustained effort. Sometimes just finding them wasn't easy. So - if you're really the engineer on your team who most everyone else would identify as "the best", please don't waste any time maintaining a network. Just keep doing truly great work that others will still be telling stories about over drinks years from now.

If you're not that engineer... then by all means be a reliable, likable, good communicator and maintain your network! Because as a founder, I never had enough high-credibility sightings of "great engineers" in the wild, so I had to mostly build teams out of credible referrals of best "good engineers" and even best "intern or new grad engineers with potential" you've worked with.
by MarkusQ | 2025-09-02 16:49:51+00:00
> “[The spike is] a novel contribution of this algorithm that is not

> usually done in phylogenetics,” Douglas said.

They built a model that incorporates a controversial non-standard dynamic and found that it exhibited the very processes that they added.

Showing an effect in computer simulations designed to produce exactly this effect is as bad as showing something "in mice"; in both cases, you generally get stories reporting the "results" with only a brief in-passing mention of the key caveat.
by sgnelson | 2025-09-02 16:50:08+00:00
For me that brings up two questions:

1) Will I (and others) be able to get a H100 (or similar) when the bubble pops, and would that lead to new innovations from the GPU poor?

2) Will China take the lead in AI as they are less "capitalistic" with the demands for outsized returns on their investment compared to US companies, and they may be more willing to continue to sink money into AI despite possible market returns?
by kelseyfrog | 2025-09-02 16:50:12+00:00
Morally viable. One that conforms to personal and social norms and values.

For example, if one values free speech or resistance against reactionaries, then a platform which censors and promotes reactionaries would not be morally viable.

Many people, think they hold a different set of values than they do. When push comes to shove, following rules, stability, and security trump liberty, freedom, and equality. In reality some folks are much easier than even that - a quick bite of hot news releases a squirt of dopamine more enticing than all of these and it's much easier to justify that it didn't really compromise their moral behavior.
by bgwalter | 2025-09-02 16:50:15+00:00
Interesting that investors pay so many billions for a product that just iterates until something, somehow compiles but emits subtle garbage.

Intellectual engagement goes down, users get dumber and only look at quantity. China is taking first steps to continue its excellence. In the New York Post of all places:

https://nypost.com/2025/08/19/world-news/china-restricts-ai-...

"It’s just one of the ways China protects their youth, while we feed ours into the jaws of Big Tech in the name of progress."
by llm_nerd | 2025-09-02 16:50:22+00:00
Storage multiplies and becomes more expensive once you're replicating across regions, backing up into an eternally growing corpus, and so on.

But the biggest impediment by far were internet transport costs. I mean, they're still onerous for a lot of media-heavy sites, but it was much worse at the time. Offloading that to third parties made an incredible amount of sense.

It's actually kind of bizarre that there is an Imgur "community". I know the operation ran at a massive money-losing proposition for quite some time.