skysight-inc/HackerNews huggingface dataset:
Here OpenERV use a push-pull ventilation design where air direction is reversed every 30s. This allows energy recuperation and dispense connecting the inlet and the outlet to each other, as each ventilation port alternate role simultaneously.

The alternative design is a counter-flow heat exchanger.
Using 3d printing and gyroids it seems possible to build quite compact ones. (metal 3d printed heat exchanger for helicopter https://www.youtube.com/watch?v=1qifd3yn9S0 )

3d-printing a counter-flowing heat-exchanger seems interesting but maybe there are some molding issues that need to be taken care of (maybe HEPA filters on the inside in/outlet are sufficient).

The main advantage of the heat-exchanger solution is that you won't need specific electronic control and can reuse the standard fans for controlled ventilation, but there is more thermally isolated piping required (and the pipes are quite big (~10cm diameter) because they need to move a lot of air even if the fans are weak).

The push-pull system is harder to DIY because most of the off-the shelf fans can't be reversed easily (and 3d printed fans are noisy and inefficient).
Permalink https://www.nrc.gov/reading-rm/doc-collections/event-status/...
"she studied philosophy, politics and economics at the University of Oxford, where she was an undergraduate student at New College, achieving a 2:1 Bachelor of Arts degree in June 2000.[8] From 2003 to 2004 she studied for a master's degree in economics at the London School of Economics."
In this case, the 2-slot RTX 6000 consumes 300 W whereas the "nerfed" 3.5-slot 4090 can draw 450 W.

So I don't think the nerfing here was to lower power consumption. It's just market segmentation to extract maximum $$$$ from ML workloads.

nvidia have always been pretty open about this stuff - they have EULA terms saying the GeForce drivers can't be used in data centres, software features like virtual GPUs that are only available on certain cards, difficult cooling that makes it hard to put several cards into the same case, awkward product lifecycles, contracts with server builders not to put gaming GPUs into workstations or servers, removal of nvlink, and so on.
What’s funny is nothing could be worse for our country than post war US foreign policy. Check out the wikipedia article on US foreign interventions. We don’t need China to fuck us up by subtly sending messages, we have our entire political establishment overtly doing it every day in DC.
This is true; in the 90's we had eye strain from the monitors but nobody got blisters on their fingers from flipping toggle switches!
ETFs only allow purchasing of spot bitcoin IOUs, whereas MSTR is open to a far bigger market (e.g. options, bonds, convertible bonds etc.)
Show HN: Data Extraction with Flexible Schemas
Hey!

We’ve built a data extraction tool to flexibly automate data and document processing.

You’ve probably seen a few of these, so have we! A few of us have been varyingly stuck trying to automate the extraction of borrower financials for the past 5 years.

We think that there are a few missing features of most data extraction tools.

* They are usually too complex to quickly get up and running

* They are overly constrained in terms of what workflows and documents they support

We’ve always felt like speed and flexibility were sticking points, so we went slightly orthogonal to the alternatives.

It is deliberately very simple, with three key features

1. Generate a custom schema that is the target of the data extraction

2. Logic and “expert insights” can get added to field level prompts

3. Ability to share with externals via chat to get data and feedback, quickly!

The demo page is at https://go.sea.dev with an explainer and link to demo.

The demo app is constrained, but feel free to get in touch with me with details if you’d like to unlock the full capabilities

Some of the features we are working on:

* Improvements on OCR

* Advanced data management

* Email or WhatsApp to accept responses

* API and embedded data collection copilot for SaaS

* Meeting recording plugin, and streaming audio

* Securely share partial submissions with 3rd party for completion

* Enrichment via website scraping

* Integrations (Hubspot, Sheets etc)

We are a very small team, with a mix of researchers and engineers. We are leaning into improvements in data extraction, conversation evals and data structuring innovation to make the product as powerful and seamless as possible.

Our background is in financial services, so most of our effort is going into that use-case (business risk assessment to be specific), we’ve solved a bunch of our internal use cases as well as general purpose customer problems, so we thought to share it with a wider audience.

Would love to get your feedback and comments!
That's such a silly analogy it's tantamount to constructing a straw man.

I don't have a background in mathematics either, but I think it's quite clear that the use of "isomorphic" here as a stand in for code sharing is forced, to say the least.

It's the same kind of silliness as using the term "tree shaking" in place of dead code elimination (which is, you know, an established technical term in the same field). In this instance however, instead of using a fancy-sounding word (which I think is a little pretentious), they've gone with an analogy with a less obvious meaning (what are you shaking from the tree? Are the good bits falling off also?).
I remember trying to install Linux on a spare 386 with like 2MB of memory? Bought the SuSE book from the bookstore, tried to install it. Apparently the 2MB was not enough to expand the boot floppy, so I had to make a swap disk first. Everything from the paper manual.

It was pretty cool when it worked. I think I managed to serve a website from it and I used it as a fancy teletype.

MacOS 8.6 and Windows 95 OSR2.1 (the one that had good USB support, but no IE yet). Back then I loved to tweak my OS'es, I totally stripped them from anything it didn't need, tweaked the animations to be instant. Dual Celly 300A@450.

I think I installed a Windows 2000 beta somewhere in 1999 and stuck with that until they really ended support for it. Pretty consistent UI, lightweight. Ran most software including games, even when not officially supported.

Played with the MacOS X Betas, on hardware comparable to the first iPhone in terms of performance. Blue White G3 Tower.

I loved computers back then. Now they're just tools.
I disagree with toenail being downvoted. In Europe, employees enjoy a great deal of stability. In Netherlands, it's nigh-impossible to fire someone: you have to fill in 10 pages of justification paperwork and have an independent government agency review and approve it. If someone has a long-term illness then you have to pay 70% of their salary for up to 2 years, even when they do no work at all. Most people don't want to be entrepreneur: they want clear instructions and stability. When you try to give stock to employees, the tax authorities raise an eyebrow: why would you give stock to employees when they enjoy none of your risks? It makes no sense, so we'll treat it as a form of salary, so we'll tax you 52% on the stock's paper value.

At the end of the day, what's left for the entrepreneur? You enjoy all the risk, but you don't get to have a paid 2 year sick leave. Even sympathy for your hard work can be hard to get. The potential of money is all you have.

Things are different in the US of course, where people can be fired the next minute without reason. That looks like just borderline abuse to me. But from a European perspective, the above comment does not deserve downvoting at all.
This all really has nothing to do with extroversion to me.

We are talking about what is essentially sales and marketing skills.

I am the life of the party but I would never try to freelance because I hate sales and marketing so much.

This is all really asking how to start a business without having to do sales and marketing. Obviously, that is not going to work.

One can either gain these skills or do something else.
Aside from the nostalgia I think this is a big part of the 8-bit love in the nerdier corners: you can hold the entire thing in your head.
Browser Choice Must Matter
Feel free to email me about starting an insurgency, that's basically the only way I can see motivating myself to ever go back in big tech or big corp.
I'm ambivalent about this sort of thing (or, as another example, Intel's CPUs many years ago that offered paid firmware upgrades to enable higher performance).

On one hand, it's very bad because it reduces economic output from the exact same input resources (materials and labor and r&d).

On the other hand, allowing market segmentation, and more profits from the higher segments, allows more progress and scaling for the next generation of parts (smaller process nodes aren't cheap, and neither is chip R&D).
TCL’s agreements say you’re not allowed to do that.

https://www.tcl.com/us/en/roku-tv/eula

“If you do not agree to this EULA, you do not have the right to use the Television or the Software. If you are within the allowable time period for returns under the applicable return policy, you may return the Television to your seller for a refund, subject to the terms of such return policy. You should perform a factory reset before you return it to erase data that may be stored on the Television.”
For what it's worth, protein structural biochemistry uses similar terminology for sheets. Since a strand has a direction (N to C), sheets are 'parallel' when neighbouring strands are pointing (roughly) in the same direction, and 'antiparallel' when pointing in opposite directions.
I assume you're talking about thermodynamics - this comes down to a slight abuse of notation. For an ideal gas, say, you can express various state functions like the internal energy in various different ways. You can do it in terms of pressure P and volume V to get U ~ PV, for instance.

Or you could do it in terms of temperature T and pressure, for instance, to obtain U ~ T (in this case there's no dependence on pressure).

The ideal gas laws let you transform between these choices. But the point is that the same physical quantity, U, has multiple mathematical functions underlying it - depending on which pair you choose to describe it with!

To disambiguate this physicists write stuff like (dU/dP)_T, which means "partial derivative of U wrt P, where we use the expression for U in terms of P and T". Note that this is not the same as (dU/dP)_V, despite the fact that it superficially looks like the same derivative! The former is 0 and the latter is ~V, which you can compute from the expressions I gave above.

The mistake is thinking that U is a single function of many independent variables P, T, S, V, etc. Actually these variables all depend on each other! So there are many possible functions corresponding to U in a formal sense, which is something people gloss over because U is a single physical quantity and it's convenient to use a single letter to denote it.

Maybe it would make more sense to use notation like U(T, P) and U(P, V) to make it clear that these are different functions, if you wanted to be super explicit.
That's the beauty of it, it means what ever you want it to mean.
Maybe.

Meng Wanzhou got caught because she was in Canada, and she was (apparently) a Chinese national. But I cannot imagine Singapore just handing over their own nationals to the US as a political prisoner...
No, that's called politics.

You cannot build anything in Germany for the government, as it will be delayed and changed endlessly. And you cannot build anything bigger, as competitors will sue the process, leading to endless delays and changes.

It's also called radical inefficiency.
I suspect today's younger generation will view "computers" much like we experienced TV, something you've always know that's gotten a lot better technically but the overall experience is pretty much the same and very consumption based. The focus is all on volume and ease of use, so the perceived reward isn't as valuable.
Steampipe project lead here - thanks for the shout out & feedback multani!

I agree with your comment about JSON columns being more difficult to work with at times. On balance, we've found that approach more robust than creating new columns (names and formats) that effectively become Steampipe specific.

Our built-in SQL client is convenient, but it can definitely be better to run Steampipe in service mode and use any Postgres compatible SQL client you prefer [1].

You might also enjoy our open source mods for compliance scanning [2] and visualizing clusters [3]. They are Powerpipe [4] dashboards as code written in HCL + SQL that query Steampipe.

1 - https://steampipe.io/docs/query/third-party
2 - https://hub.powerpipe.io/mods/turbot/kubernetes_compliance
3 - https://hub.powerpipe.io/mods/turbot/kubernetes_insights
4 - https://github.com/turbot/powerpipe
I think the useful model for this is that currently there's a competition between the naval powers and the land powers, which is rapidly heating up. (Due to the last decades of very high rate of economic growth of China.)

https://youtu.be/YcVSgYz5SJ8?t=7765

Maritime order (basically a trade alliance, if you join you have more chance to influence it, win-win) and the continental order (buffer zone, extractive/authoritarian, negative-sum).

Of course as the competition is getting fierce one seems to borrow from the other. (Russia is funding itself and its war from trade. And China sold market access in exchange for technology.) And the US is now transitioning from soft-power to pay up or you are out. (Balance of trade, NATO contributions, etc.)
This is really naive. These algorithms can be and are tuned to manipulate the audience.

That being said, it’s not fair to single out TikTok. They all do it. The only unique danger with TikTok is that it could be controlled by a foreign adversary, or at least could be more easily than the others.
Seems more like AI is like a Roomba and a person using a vacuum cleaner is like a human. Roomba can do the easy bits that are well-defined.
Oh I'm sure a lot has, but there is still a ton of Windows-only software out there. All those commercial tools engineers use to study the power grid are almost always Windows-only (at least the 10 major vendors I can think of off hand). I'm sure many other industries are similar. Also, all user laptops at a lot of corporations are Windows-only. It's changing of course, but not quickly.
Sony hasn't been this hot since it made the Walkman
Location: Bratislava, Slovakia (comfortable with different time zones - partly overlapping etc.)

Remote Yes

Willing to relocate: No

Technologies: html/css(sass, tailwindcss), Javascript(jQuery, vanilla), Wordpress (twig, acf, php, custom theme development), NextJS, ReactJS(non professional experience)

Resume/CV: https://drive.google.com/file/d/1ZIP2zktpY6GkBbez2xrcCzB_-3t...

Email: gio97niko@gmail.com

About me: Hi I'm Giorgi. I am a frontend web developer with over 3 years of professional experience. I've been freelancing as well as working with a team (US based digital agency) in past years, so I'm comfortable working individually and in team environment. Most of my career I've been working in Wordpress development. I'm open to similar opportunities but would be even more excited for a change (app development). I adapt quickly and most importantly work hard. Outside of work I love working out and spending time with my friends :)
PS: Past year I've gained a lots of knowledge in web accessibility and have been leading the way in this area for a team that I work with currently. It is something that I constantly improve in and enjoy working on.
We’re launching Wetime AI on Product Hunt and could really use your support!

Would you be willing to follow our page and upvote it when it goes live? It would mean a lot to us! Here’s the link: https://www.producthunt.com/products/wetime-ai

In return, I’m happy to do the same for your launch or project. Let me know if you’re interested!

Thanks so much for your support!
These are all good points, but the people I'm talking about at a high level are more like managers, not devs. The managers haven't even expressed an interest in managing anything.
"U.S. bad so just ignore outside influence". Can you imagine a world where both should be taken seriously? Or are you just here to minimize?
I took advantage of that to generate Mandelbrot and Julia set graphics on one. It was fun as a coding exercise, but pretty slow processing.
Single mutation in bovine influenza H5N1 switches specificity to human receptors
> If you're willing to put in that QA work yourself the productivity boost you can get them from is immense.

Isn't that work more than half the work of programming? I seem to find myself spending much more time on test code than on application code.
While I agree with your points, $0.30 for injection moulding would need quite the scale, and I have doubts about whether two CPU fans would have enough power to flow enough air even in the absence of a HEPA filter.
Show HN: Aldren Quest – Browser RPG
Hello everyone!
I've finally finished my latest side project - a RPG game made in Blazor.

It started as a small project to learn some Blazor (I'm .NET dev but kept mainly to backend and ASP.NET). I had such a good time coding it that at some point I decided to make a full featured game out of it. I might've have bitten off more that I could chew as RPGs have so many systems and elements but overall I think it worked out well, especially for a single person project.

I want to hop on the next project soon so any comments/questions/tips than can make me better really appreciated!
Best Linux Distro 2025 for noobs to experts
Would you release an update that works on Android 9+?
Indeed, the charts for cutting metric threads are complex, and I'm not sure all of the standard pitches are even possible.

The lathe that I use hasn't had its threading gears installed in ages.

A weird historical tidbit is that after WWII a couple of standards emerged for bicycle parts in Europe, where they used metric diameters and inch thread pitches.
In my case it was wiggling the ISA card in an attempt to get it out of the socket bumped the (badly placed) CMOS battery off the motherboard, which required maintenance of the soldering iron variety.
You had everything on cd or floppies - or maybe a zip/jazz drive if you were in school with a fast internet connection - and reinstalled from the OS up. I can't have been the only person who cut out the hologram license key and stored it in the back of my cd binder - or sharpied the keys right on the disk!
There's only 7 billion tonnes of carbon dioxide in the atmosphere, total; winding it back a few hundred billion tonnes is not going to be physically possible unless you're talking about Venus. (Which is, admittedly, a pretty appealing prospect.) Here on Earth, the amount we need to remove is 0.02 hundred billion tonnes to get back to pre-industrial levels. That is, 2 billion tonnes. Of CO₂, not carbon.

There are a variety of different possibilities as to what to do with the extracted carbon. CO₂ is kind of an inconvenient form for making fuels from, so as long as they can cook oil and gas out of shale, people might just pump the carbon dioxide down wells and let it serpentinize some olivine, rather than reducing the carbon back out of it.
> That being said, it’s not fair to single out TikTok.

> The only unique danger with TikTok is that it could be controlled by a foreign adversary, or at least could be more easily than the others.

Isn't that the entire reason given for why they are singling them out? You say it's not fair then give the exact reason why it seems to be.
Hackers Jailbreak Digital License Plates to Make Others Pay Tolls and Tickets
The solution to this is to change the way elections work to make it harder to pull off this kind of short term influence pumping. The problem is that it’s possible to flood the zone with shit before people have a chance to have discourse on it.

I’ve heard a number of ideas including multiple round elections with averaged results. That way if someone pops in round one the discourse can focus a spotlight on them and if people don’t like what they see on closer inspection they can push the other way in round two.

The other problem though is that establishment politicians are so unpopular in so many places around the world that a rando with a simple catchy meme-worthy message can run in from nowhere and upset things. If the establishment were more responsive to the people it would be harder to do this.
Or like, movies?

> The agreement was seen as a way to "spread the American way of life" though a war-torn France (and Europe at large)

> To further the cultural propagation effect of the Blum–Byrnes agreements, the informational Media Guaranty Program was established in 1948 as part of the Economic Cooperation Administration to "guarantee that the US government would convert certain foreign currencies into dollars at attractive rates, provided the information materials earning the moneys reflected appropriate elements of American life".

https://en.m.wikipedia.org/wiki/Blum%E2%80%93Byrnes_agreemen...
Our official policy is to bankrupt our country by medaling in the affairs of everyone else, how could their “influence” possibly be any worse?
Holy shit can you people stop with "every point that disagrees with me is a russian propaganda point" are you serious? Can you not conceive of anyone disagreeing with you in good faith without being a state actor? You're literally just declaring a specific kind of speech "not free speech" as if it's a fact and not your arbitrary opinion
Simple - no one asked you to use American LLMs. The same way no one asked you to rely on America to power your defence forces.
> population control

Which population?

The situation in most well off countries is already that native populations have fallen below replacement rates. The result has not been to rejoice in the would-be crisis being averted but instead the crisis has been inverted and now those countries "need" to import foreigners to keep their economies from imploding. Or are you suggesting population control for africa and the middle east? Because I'm not sure they'll agree.

I agree that society needs to adapt to the post-scarcity reality but "population control" is and will always be something dystopian. It's also irrelevant because the more we automate the less people we actually "need" so no amount of population control will ever solve the underlying issue.
I haven't tried it , but steampipe has a k8s plugin which lets you use PG/sqlite: https://hub.steampipe.io/plugins/turbot/kubernetes/tables
"What good is a phone call, if you are unable... to speak?"

-- Agent Smith