MurphyA/hacker-news huggingface dataset:
by bhouston | 2025-12-29 15:14:41+00:00
As someone who knows the Navier-Stokes fairly well ( https://scholar.google.ca/citations?user=--UmWDUAAAAJ&hl=en ) I have to admit I this is completely impenetrable for me. I don't understand why there is a Pressure minima nor a Torus throat on the Fluid Dynamics side of things. Why does it jump to Beltrami flows off of a sudden? I have no clue how to interpret this. Maybe the issue is that I understand Navier-Stokes from an engineering/application standpoint rather than the theoretical side?
by shagie | 2025-12-29 15:14:58+00:00
> People don’t realize how many man hours went into those early decisions.

In my "trying to hunt down the earliest reference for the coefficients" I came across "Television standards and practice; selected papers from the Proceedings of the National television system committee and its panels" at https://archive.org/details/televisionstanda00natirich/mode/... which you may enjoy. The "problem" in trying to find the NTSC color values is that the collection of papers is from 1943... and color TV didn't become available until the 50s (there is some mention of color but I couldn't find it) - most of the questions of color are phrased with "should".
by rboyd | 2025-12-29 15:15:00+00:00
Would you integrate with existing POS systems or is this a new one? If a new one do you integrate with some existing hardware for card scans?

I saw the POS systems often have developer/partner programs but at this late stage are they granting those partnerships or is this a gatekeeping system?

Do you have to sell the customer on migrating away from their existing system? How do you convince a massage parlor to migrate from Square? A sushi restaurant away from Toast?

Price?

Thanks.
by latexr | 2025-12-29 15:15:41+00:00
> It's funny hearing someone talk about "market segment" in art.

Why? Art has a long tradition of being coupled with commerce. Michelangelo didn’t paint the Sistine Chapel for free. Social media is still full of artists open for commissions. Even Patreon creators have specific markets, the people who are interested in their work. There’s nothing odd or incongruent about it.

> It looks like gen AI because that's a way for the artist to comment on these issues.

I think you’re reading too much into it and inventing the symbolism. We don’t even know who the supposed artist is (we have a name but zero links for confirmation). The mistakes that let us know its AI are too subtle (package referencing incompatible types of milk, maze which goes nowhere) to communicate those ideas. Given the current climate and Gilligan’s outspokenness, I think it’d be doubly stupid if the alleged artist had tried to make that statement in such a way.

https://tvtropes.org/pmwiki/pmwiki.php/Main/FauxSymbolism

All that said, we all have the incomplete history, so it’s at least possible that you’re correct (though I firmly believe you’re not) and we can’t know for sure without more information. I want to make it absolutely clear that when I use the word “stupid”, I’m referencing the actions of the people who would’ve followed the actions you describe, in no way is it pointed at you directly.
Show HN: Test-MCP, end-to-end testing for MCP servers
by idoco | 2025-12-29 15:16:02+00:00
We built this while developing an MCP server internally and got tired of manually testing changes by chatting. Unit and integration tests passed, but issues still appeared once a real MCP client and an LLM were in the loop.

test-mcp is a small, headless MCP client for running end-to-end test flows against MCP servers using real LLMs. It’s early, and I’m mainly looking for feedback from MCP builders.
by niemandhier | 2025-12-29 15:16:59+00:00
It’s a system run at the absolute border of what is possible and that was designed with the “just enough” philosophy in mind.

You cannot add a stop if the rails are single track and the next train is just behind you.

If you do said train will be delayed, will not be able to switch tracks at its final destination ( since it has a hard slot for that) and errors cascade.

It’s the best possible train system, given how little was invested …
by Taek | 2025-12-29 15:17:05+00:00
Oh man, DB has one of the worst experiences in my well traveled history.

If you don't buy a seat, you don't get a seat. I was taking the 4am train 8 hours from Brussels to Berlin, and I bought seats for both legs of the trip. To sleep, of course.

The first leg of the trip was delayed, so they gave me a free ticket on the next train, 40 minutes later, but with no seat.

So, exhausted as all hell and wanting nothing more than a little nap, I was forced to stand in one of the hallways between the carriages, unable to rest much even vertically because people had to push past me to get to the bathroom.

Absolutely horrid experience.
by jonasdegendt | 2025-12-29 15:17:25+00:00
Hah nope! Even as a Belgian I find the naming of the Brussels train stations maddening. Brussels-Midi is the south station, so Brussel-Zuid. Midi allegedly means south in French, but I've never actually heard it being used over "sud", also south.

In conversation, midi also means noon (e.g. used as "meet me at noon"), which for my brain correlates more with central than south, given the context of a day.

Not a linguist, so what do I know, maybe someone else can chime in.
by poszlem | 2025-12-29 15:17:56+00:00
This is a self-fulfilling prophecy. If the state arrests someone for a joke, and that person, feeling persecuted, joins an anti-establishment or far-right group, the state cannot then say, "See? We were right to arrest him because he's now a member of that group."

You are using Meechan’s political actions in 2018 and 2019 to justify a legal conviction for a video made in 2016 (which you said happened "soon after").
by nmstoker | 2025-12-29 15:18:28+00:00
Reminds me of being en route with Lufthansa to Germany, needing an emergency landing in Turin, being shepherded onto a new working plane by Italians, then continuing to Germany where the whole plane load arrived without tickets from Turin...

The gate people tried to tell us it was impossible to be there without tickets, as if we were somehow collectively hiding them and a bit of persuasion would convince us to find the non-existent tickets! Not one person found they had a ticket, despite this allegedly being impossible.
by sanskritical | 2025-12-29 15:18:45+00:00
At this point, assertions such as these are a form of ad hominem fallacy against half of society. You are discrediting the multitude of sources who have covered this story because of the nature of the speaker while no hardline liberal outlets have covered this story at all and presented a counterargument. If you want to have an alternative narrative, you need to link a major outlet showing her to be a liar. The case has been presented to the public. You don't like the people presenting the case. That doesn't invalidate the case. You must, at this point, present a member of your team making a reasonable, evidenced based deconstruction of her claims. The fact that there isn't any coverage from your side at all of this incredibly well televised and written embarrassment for the legitimacy of crown prosecutors speaks volumes.

The UK is extremely litigious in regards to libel. Her lying would be an act of public libel against the crown prosecutor. She went on TV to talk about it. It's been well covered in everything from the IB Times to The Sun to the Daily Mail (as linked above), as well as fully televised on Piers Morgan. Naturally the team you obviously root for can just refuse to cover any prosecutions which are embarrassing for them and you can simply smugly say "well it's not in any source I personally recognize as valid so it didn't happen."
by miyoji | 2025-12-29 15:18:51+00:00
> If you start without instruction, you'll build bad habits that stay with you forever.

> Effort doesn’t equal improvement unless it's guided.

This obviously has to be false. Progress is made, people learn better ways to play golf and do all the other things. At the frontier, people simply MUST be doing self-guided experimentation and learning from objective results, and since this has always been true, there was once someone who could not play golf at all (because no one could) who figured out how to hit a ball with a club correctly on their own, without learning from anyone else, because that person was the first person who did it. Thus, self-guidance must be possible and self-improvement must also be.

> But if you repeat the same shitty swing for 10 years with no feedback, you’ll end up exactly where you started.

You always have feedback. If your ball doesn't go where you intended, your swing was bad in some way. If you keep doing the same thing without making adjustments based on measured outcomes, yeah, you won't improve. But you can try different things and figure out what works and what doesn't without ANY instruction or outside guidance.
by phatfish | 2025-12-29 15:18:57+00:00
Don't bother, getting arrested and spending 2 hrs in a police station is the same as political prisoners going to a Siberian camp for 5 years, in the eyes of Americans.

It is scary how Trump has really taken over America. This war on European ideals is directly from Trump and Vance in the Whitehouse. Americans seem to be loving it.
by i3po | 2025-12-29 15:19:03+00:00
I have craft android video downloader with browser for downloading from as much web-sites as i can do, last update bring proxy chains support (Xray powered) and i am going to add firefox browser instead google webview. All of this made because google violate humans rights, revealing developer personal home addresses to whole internet and i have no idea why no one talks about it, is this violations will be discussed after somebody will be robbed? or somebody write scrapper with reach developers with home adresses?
by Verdex | 2025-12-29 15:19:34+00:00
Certifications have always been irrelevant for me, but that's only because my goal has always been what I'm capable of doing on my own AND (this one is a biggie) I was unbelievably fortunate to have several people in my career who trusted that I could get the job done.

Certifications are about low trust. With the advent of modern LLM tech, trust levels are probably not going up.

Nobody needs to hire someone who can use an LLM because if that is the skill they're looking for they can just use the LLM themselves.

So if you need to hire someone because the LLM isn't cutting it, then you'll by definition need to be hiring someone who isn't using an LLM. Someone who isn't just using an LLM to make you think that they aren't using an LLM.

How is that going to be done? Sounds like a job for certifications to me. Not today's certifications, but a much more in depth, in person, and gatekeepery certification.

My guess would be that certifications, unfortunately, will be significantly more relevant in the days of LLMs. Not less.
by Workaccount2 | 2025-12-29 15:20:09+00:00
LLM's are bad at anything with images.

There is something fucky about tokenizing images that just isn't as clean as tokenizing text. It's clear that the problem isn't the model being too dumb, but rather that model is not able to actually "see" the image presented. It feels like a lower-performance model looks at the image, and then writes a text description of it for the "solver" model to work with.

To put it another way, the models can solve very high level text-based problems while struggling to solve even low level image problems - even if underneath both problems use a similar or even identical solving frameworks. If you have a choice between showing a model a graph or feeding it a list of (x,y) coordinates, go with the coordinates every time.
by guerrilla | 2025-12-29 15:20:12+00:00
> boosting glutamate won't work.

You would not want to boost glutamate. It's the opposite. You want to reduce glutamate and/or increase GABA. The problem is overexcitation, not underexcitation.

The reason the number of receptors might be low in the first place is downregulation from too much glutamate.
by RangeLead | 2025-12-29 15:20:42+00:00
I’ve built and maintained a pipeline that collects public business listings at scale.

Scraping itself was straightforward compared to everything that followed.

Once the data volume grows, most of the work shifts to:

-handling inconsistent categories
-deduplication across sources
-outdated or closed businesses
-missing or misleading fields
-deciding what “usable” actually means

Many datasets look large but fall apart when you try to use them for anything practical.

This post breaks down where most scraping projects fail once they move beyond small experiments, and what actually takes time when you want clean output.

Would be interested to hear how others here approached data validation and cleanup at scale.
by concinds | 2025-12-29 15:20:47+00:00
Sure, supposedly.

Except Liquid Glass looks nothing at all like visionOS. If they had just taken a carbon copy of the visionOS UI and put it on Mac and iPhone, I doubt there would have been any controversy. Buttons don't look like they hover way higher than the UI. Sidebars and toolbar buttons are indented, they don't scream "LOOK AT ME!".

Dye is just a moron.
by mcphage | 2025-12-29 15:21:13+00:00
> Firstly why wouldn't one be scared of an opponent that can just steadily press against me, winning a war by attrition?

Because if they can barely succeed that way against an enemy 1/3 of their size, they wouldn't be able to succeed that way against an enemy larger than them. And that's not even accounting for the fact that, after fighting a war of attrition, those people, those resources are dead and gone. Even if Russia wins, they don't have the manpower to do this again.
by electroly | 2025-12-29 15:22:28+00:00
Note: the scale does go further than "r" on the high-memory end with some specialty "x" families.

c*: 2GB per vCPU
m*: 4GB per vCPU
r*: 8GB per vCPU
x2idn/x8g: 16GB per vCPU (!)
x2iedn/x2iezn/x8aedz: 32GB per vCPU (!)
by Saline9515 | 2025-12-29 15:22:36+00:00
The problem is that it also prevents countries from reducing the regulations in order to foster local innovation, avoid disadvantageous rules (there are more lobbyists than bureaucrats in Brussels, for a reason) or adapt to a new reality (AI being a good case). Moreover, each country still have their own specific laws, the EU regs come on top, and don't decrease the amount of laws. And the EU votes a lot of laws, since its the main power it has, on average 7 per day.
by maccard | 2025-12-29 15:23:02+00:00
I failed one exam in my final year of uni (marginally), but passed the module because of excellent coursework. I put in an order of magnitude more work into the coursework for that class than I did any other class because I knew I was going to struggle in the exam.

In all honesty I shouldn’t have passed that course but it is what it is - and as far as I was (and still am) concerned, it was a bolt on course that I am ok being limited in my knowledge of.
by mrbombastic | 2025-12-29 15:23:29+00:00
This just happened to me a couple days ago trying to get from Luxembourg to Heidelberg, got on what I thought was the right train at a transfer but was apparently the wrong half, announcement only in German, rushing to find a spot for luggage in packed train and getting scolded by various Germans and we missed it. 3 hours of travel to end up back in Luxembourg and we got a very expensive rental car to get to our next couple destinations, not proudest travel moment. Next train we took was easiest possible scenario, Nuremberg to Munich, one train no transfers, assigned carriage, app helpfully shows you where to stand, arrived with time to spare. Except the platform changed as train was arriving, announcement again only in German, asked an attendant if train on other platform was our train, “No that train is on platform 9” rush up and down platform 9, carriages and train number don’t match ask another attendant if the original train on the other platform is ours, says you have no time, jump on that train, it is right but we are on opposite side of train and walk through the entire train with luggage again with various Germans giving scolding looks. Peaceful way to travel.
by Aurornis | 2025-12-29 15:24:09+00:00
> Ask an examiner from 20 years ago the risk of allowing people to take exams in their own home. They would have said 'cheating', even with no concept of AI.

AI has taken it to the next level. Previously, with many exams you would still have to know how to identify the concepts and related keywords in a word problem to even know what words to look for in the index of the books on hand before you could get to the right page to start cheating.

Some of the certification exams I had to take back in the day even came with their own little reference manual that everyone got and was free to use to look up concepts and equations like you would in the real world. The book wasn’t helpful if you didn’t know how to recognize the way to solve the problem and look it up, though.

AI changes that. Now you don’t need to know anything at all. You don’t even need to parse the question or even speak the same language. Copy the problem into ChatGPT with a prompt attached. Copy the answer into the solution box.

Anecdotally, the rise of ChatGPT has also normalized the concept of cheating among students. The common thinking is that everyone is using ChatGPT, therefore you’ll be left behind if you don’t cheat.
by lanthade | 2025-12-29 15:24:20+00:00
Yeah I have no idea how they pulled off the structural piece. The building was built long before the technology was invented. It is a specialized building though. I was reading about its renovation/expansion in 2014. Apparently there are a couple 2 story labs to accommodate large distillation columns and there was additional vibration isolation work done because there's now a light rail train running right outside it.

Speaking of interesting building design, the chemistry building on the same campus was designed to channel any lab explosions upward. Apparently the roof will blow off but the building won't blow out and damage other buildings around it. Inside the building you die, outside you keep walking to class.
by spzb | 2025-12-29 15:24:24+00:00
I am yet to see a vibe coded success that isn't a small program that already exists in multiple forms in the training data. Let's see something ground-breaking. If AI coding is so great and is going to take us to 10x or 100x productivity let's see it generate a new, highly efficient compression algorithm or a state-of-art travelling salesman solution.
by stevekemp | 2025-12-29 15:25:28+00:00
That is beautiful.

I wrote a console-based emulator, and a simple CP/M text-adventure game somewhat recently

https://github.com/skx/cpmulator/

At some point I should rework my examples/samples to become a decent test-suite for CP/M emulators. There are so many subtle differences out there.

It seems I could even upload a zipfile of my game, but the escape-codes for clearing the screen don't work, sadly:

https://github.com/skx/lighthouse-of-doom
by seba_dos1 | 2025-12-29 15:25:52+00:00
With 1:1:1 the matrix isn't square, and if you have to double one of the channels for practical purposes then the green one is the obvious pick as it's the most beneficial in increasing the image quality cause it's increasing the spatial resolution where our eyes can actually notice it.

Grab a random photo and blur its blue channel out a bit. You probably won't notice much difference aside of some slight discoloration. Then try the same with the green channel.
by spwa4 | 2025-12-29 15:25:53+00:00
It means a few US companies have the power to just turn off European payment systems, and frankly China probably as well, before and after this effort and there's nothing the ECB can do about it. And that means, they can't stop Trump from doing it.

What was the sole purpose of introducing this again? Preventing that. This doesn't help.

And EU countries have already demonstrated ... they had a near-monopoly on everything really. On chips, interconnects, cell phones, cars, optics, planes, satellite internet, ... but they traded it for a bit of money. If they want it back, it's of course going to cost EU states a lot of money, which they're not willing to do.

So why do they say they're going to do this? They, as in the rest of the EU organization, is not willing to put in the effort. In the short term it's slightly cheaper to have Google and Apple do this, and the ECB will have to live with the fact that if Trump decides all EU payments stop ... they stop. Funny how the US has never done that unilaterally, always through the UN, and the ECB has done that, without asking anyone (to Greece, and to Italy, and if we're brutally honest, to a bunch of African states too).

So I don't feel particularly sorry for the ECB here.

But I must ask: given that this doesn't make 1 mm progress towards their stated goal ... qui bono?
by zabzonk | 2025-12-29 15:26:12+00:00
> Ask an examiner from 20 years ago the risk of allowing people to take exams in their own home.

Isn't this like an "open-book" exam? We had them 50 years ago when I was doing my A-levels in the UK, and I always thought it was a good system. The trouble now is of course that you can ask the book to look up the answer, unless the question is very well thought out, which is hard. The open-book thing worked best IMHO for things like practical chemistry, where you needed the technique as well as the theory.
by credit_guy | 2025-12-29 15:26:16+00:00
The Axios article is reporting on a scoop, quite breathlessly. But read it more carefully.

All the employees who jumped ship (90%) had to be bought out, otherwise they would have a conflict of interests. The schedule is quite irrelevant. The remaining 10% also got cash. But the article is quite mum on the institutional investors. They can choose to cash out, or to keep the business running. Now that they have a lot of cash, they can choose to expand GroqCloud, or they can choose to pretend to keep the business running, just for show, to not trigger regulatory scrutiny. To claim it’s the second means you are quite confident the regulators in this administration will do their job. And prosecute Nvidia. Are you really saying that?
by akudha | 2025-12-29 15:26:19+00:00
everyone takes it and it loses its value

I don't know about this part. Years ago, my friend in college was taking all kinds of Microsoft certification exams and passing them with near perfect score. Thing is, he had no clue about most of the topics he passed, he had never worked with those tech. He just spent a bunch of time collecting questions (which wasn't that hard to find) and memorizing the answers. They could've made it difficult enough so just rote memorization wouldn't work, but they didn't (don't know if it has changed now).

Companies had long figured out these certifications are just easy money. It is hard to resist the temptation to just charge hundreds of dollars for a test and add it as a "profit center"
by xnorswap | 2025-12-29 15:26:19+00:00
I don't want to sound heartless, especially as I'm in the high-risk category myself, but I think it's important to recognise that while COVID hasn't gone away, it is no longer a pandemic.

It is now endemic instead, and needs to be managed as such.

https://en.wikipedia.org/wiki/Endemic_COVID-19