skysight-inc/HackerNews huggingface dataset:
The parent article has claimed that lithium-air batteries can have an energy per mass close to gasoline.

That claim is based on dividing the stored energy by the mass of lithium, which is incorrect.

The product of the reaction, i.e. lithium oxide, is stored in the battery, so a lithium-air battery can never be lighter than the lithium oxide.

Because the mass of lithium oxide is what counts, the energy per mass of pure lithium, which is indeed not much less than for gasoline, must be divided by a factor that varies between 2.14 and 5.57, depending on the construction of the lithium-air battery.

The best value of 2.14 is when the discharged battery contains only Li2O. The worst value of 5.57 is when the discharged battery contains only lithium superoxide, LiO2.

In the parent article, they claim that their discharged battery contains mostly Li2O, with only small quantities of peroxide Li2O2 and superoxide LiO2, but the exact amounts of peroxide and superoxide have not been measured.

So when computing correctly the energy per mass ratio, for lithium-air batteries it is limited to a value less than half of that for hydrocarbons. In practice batteries need a lot of materials besides the active reactants, so the achievable energy per mass ratio will be several times lower.

The advantage of hydrocarbons, regardless whether they are used in living cells, thermal engines or fuel cells, is that their reaction products are eliminated into the atmosphere, so their mass does not matter. The energy per mass for carbon atoms in hydrocarbons and for lithium atoms in lithium metal is approximately the same, but with lithium it is impossible to neglect the mass of the oxidant, like with carbon, because the reaction products cannot be dumped outside.

So for any battery except for fuel cells, what counts is the sum of the masses of the reactants, e.g. lithium + oxygen in the best case, or e.g. zinc + manganese in the cheap non-rechargeable batteries. It is wrong to compute the minimum mass of a battery by using only the mass of one of the reactants, like in the parent article, instead of both masses.
Yeah right, but who needs transformers when there are solar roofs, and hyperloop is all solar-powered anyway?
What looks modern is as arbitrary as what looks futuristic
Good thing Lina Khan is getting replaced so this can become the norm again.
Ah yes, but could you put a tail on it and call it a weasel?
Show HN: PlayWord – Turn test cases into automated, executable tests
Hi HN, Steve here! I'd love to share my recent side project: PlayWord – a tool that makes web automation testing simpler and more intuitive. It converts your natural language test steps into actual, executable actions on the web page.

For example, here's a test case I've written:

go to {TARGET_URL}

input {USERNAME} in the username field
input the password {PASSWORD}

log in

verify if the URL matches {TARGET_URL}/inventory.html

Readable, right? Now imagine it running as an automated test--that's exactly what PlayWord makes possible!

Features:

1. Describe test steps in natural language and say goodbye to annoying element locating.

2. Support recording: record test steps to create reusable automated tests.

3. Support screenshot reference: enhance AI understanding to better meet your needs.

4. Provide CLI and modular options: run PlayWord via CLI or integrate it into your codebase.

Check it out: https://github.com/Foreverskyin0216/playword

I'd love to hear your thoughts and feedback. Thanks for reading!
So… Black Mirror season 3 then?
Thanks to Anderson, I anticipated that this would be Nigel Rogers before reading the article.
There’s a whole IG account dedicated to photos from unrelated IG users who post the same photos from the same location with the same outfit and pose. It’s at https://www.instagram.com/insta_repeat
When I was young there was a thing called "keyboard navigation". The user would press tab to move the keyboard cursor to the next control element on the screen, and spacebar to activate it, Enter to activate the default button (OK), or Esc to press "Cancel". Menus and most important controls had ALT+key shortcuts. Windows provided all elements with keyboard navigation by default and devs took great care for the controls to activate in the most logical order. Even browsers and websites had keyboard navigation.

Such wonderful times... Gone now. Everything is touchscreen-only.
> regional recipes are disappearing and all food is beginning to taste the same.

Because everybody is watching the same 15 YouTube cooking channels and replicating their recipes.
On Windows I would use Notepad++ and MinGW.

On Linux I would use vim and gcc.

C is so simple that you don't really need fancy IDE to write it.
From what I understand this about how the performance of code that throws scales with the number of cores.

What is the state of current compilers for the non-throwing case? If I have code with exceptions, but test a case that does not actually throw? Will it be as fast as the same code but with exceptions removed altogether?

EDIT: I just saw that Justine's (jart) comment answers this.
> Google says its new quantum chip indicates that multiple universes exist

So is the Schrödiger's cat alive or dead in those universes ?
Google Daydream is dead, no longer supported by modern phones, the store no longer works and they removed all Daydream specific features from their own apps. Getting a Lenovo Mirage Solo to work is possible, but requires a lot of workarounds, side loading and software downgrades.

The older Google Cardboard on the other side got open sourced and is still somewhat alive, works on modern phones and even the Youtube app still has support for it. It is however not getting any attention from developers, since everybody that cares about VR has long moved on to Quest or given up on VR. Cardboard due to not having controller and limited to 3DOF was a dead end.
From consumer electronics PoV, this is a complex and brittle measure; for simple on-board microcontrollers, write-protect could be established with a basic e-fuse. But even with e-fuses, we're talking fractions of a cent per unit, which adds up at scale - there will always be a cut-off point where a company will pursue margins instead.

Meanwhile, exploding pagers.
And when a journalist receives a tip from a reliable source they can't open with their secure PDF tool, they are more likely to do what? Disregard the info, or open the PDF in an unsafe tool?
Not trying to be mean, but I’m pretty sure it was jelly _baby_ which is even funnier because they are cute and squishy.

I lost interest in the reboots after a few years but thought Ecclestone was truly marvellous, and I did return for Jodie Whittaker. Perhaps because they are both northerners like me. “Lots of planets have a North” might be one of my favourite lines of all time.
Let me translate what OP wrote:

> Good point! Thanks for the feedback.

> Nothing like this will be added to the product. Money comes from scraping content and thus content will be scrapped regardless any non-scrapping hints and we will be actively working on countering anti-scraping measures.
The Mystery of Why ChatGPT Couldn't Say the Name 'David Mayer
The ebook has a Github repo, here:

https://github.com/mrkline/concurrency-primer

You can fork/clone/download the repo and then convert the ebook into Kindle or epub with Pandoc, like so (this is what I run):

pandoc -o concurrency-primer.epub concurrency-primer.tex

(I can share my converted file, but I don't know which file-sharing service is permitted on HN. If anyone can give me suggestions on this, I will be happy to upload it and share my epub file.)
We can all help in a small way. Archive.org is a non-profit and always needs financial support.

https://archive.org/donate
Scrabble players at world champion level operate at the very edge of what is or isn't a word.

Everyone knows words like "fork", "vogue" and "alligator" but only scrabble players know whether or not "forkier", "defork", "voguier", "voguiest", "alligatored" and "alligate" are real words.
Act Fast
IDK, I'm still on Android 5.1. I thought permissions were separate from default app setting.
> Here's why I'm excited

You should keep your hands out of your pockets then.
Perhaps the problem is the fact that healthcare is privatized in the first place?
Work Chronicles Homepage – Work Chronicles
i am not much into transformers, but isn't so-called zero-flux thing something similar?

https://electronics.stackexchange.com/questions/511880/measu...
It's not going really well, is it? It looks like that every political election in the West is a gigantic plea to end or reduce illegal immigration, yet pretty much every study I see about the correlation between illegal immigrants and crime says that yes, illegal immigrants are overrepresented in crime statistics (mainly an effect of them being younger, male and poorer / less educated in average), but somehow crime rates are unaffected by illegal immigration, and never try to explain the "somehow" (the answer is probably that more crimes go unreported and illegal immigrants are not enough yet to tip the global crime scale). The impression is that investigating these topics in too much detail is frown upon (as in: not good for your career) in academia, and it's always more politically prudent to gloss over them.

(see for example: https://pubs.aeaweb.org/doi/pdfplus/10.1257/jep.38.1.181)
<opinion>

This problem is solved in its entirety by simply microwaving a cup of water. No wasted water.

If the same / similar cup is used, one can choose the desired temperature of the resultant hot water simply by varying the time. Seasonal variation of ambient water temperature may need to be taken into account.

I tend not to drink coffee, and I prefer to make tea with less-than-boiling water.

YMMV

</opinion.

Now that I’ve written that, I’ll have to put a power meter on the microwave and a kettle and report back with the results. My kettle recently broke and I hadn’t intended to replace.
> right now, it might be a swing in the direction of sameism, but i assure you that eventually new dishes will arise.

I do hope you're right, and I agree that there are some fusions that are quite exciting and add diversity to some cuisines that are otherwise quite bland and monotonous (Swedish food has definitely got a massive lift from introduced diversity, for instance).

But what I've mostly seen so far, is convergence towards the vaguely 'international' and inoffensive.

In this process, items like blood pudding (a sausage made mostly from blood and fat) or pork wrapped in cabbage with almonds and raisins get phased-out, in favor of homogenous crowd-pleasers that taste the same across Europe.
I think we had the same case in France.
It is impressive.
Potentially for health insurance but I get the actuarial argument, especially since higher than typical weight regardless of fat composition puts higher than typical strain on your cardiovascular (and other) systems
FBI Documents Release: Esalen Institute [pdf]
1. It's cheaper.

2. Design values and aesthetics are ossifying around certain "hard" rules.
Having exceptions as a possibility requires at least some bookkeeping and prevents certain kinds of optimizations due to the compiler not being able to know where an exception could come from. Generally however this is not that much of an issue, and only worth dealing with in the rarest of cases.
They are not quite the same idea. In a globalised but diverse economy, a Japanese buys a Swiss watch and a Swiss buys a Japanese air conditioner. McDonaldization refers to the incessant urge of Western societies to over-rationalise every aspect of the economic and cultural life, resulting in bland uniformity. It is a progression of Max Weber's ideas on bureaucracy and rationalisation.
Amazon plans to donate $1M to President-elect Donald Trump's inauguration
Why bother with research into fundamental physics? Is there some deeper truth about the prime numbers hidden in the universe?
Integration of Music and Art in a Science and Engineering-Based University
Engine replacement happens on airplanes fairly frequently. You don't want to scrap an airplane because of a single damaged turbine blade, or even keep it on the ground for longer.

https://jalopnik.com/how-airlines-decide-to-replace-jet-engi....
You type "SYSTEM", the same command which was used on Microsoft's CP/M basic (and other flavours).
Harvard Releases Free AI Dataset with One Million Public-Domain Books
Yet the only way to have a gaming ecosystem is to translate Windows APIs, until the day Valve learns the OS/2 lesson.

They got lucky once, as WinRT ERA didn't took off as Microsoft expected.

Next time maybe not.
Crypto is relatively new, but we all need to start thinking how to pass it to relatives when we die, otherwise it will just sit dead on blockchain
The phone is a physical object. Some light will be reflected off the screen and components under the screen. Thus #000 isn't pure black anyway.
A good "survey" of something that has been observed many times before. I'm not sure it adds any new insights, however.
My understanding is that a lot of primarily cargo ships back then also had passenger service. At https://archive.org/details/great-whitefleet-united-fruit-co... you can read how UFC's "Great White Fleet" used ships "intended for general fruit carrying and passenger service between New York, West Indian and Central American ports."

The passenger service existed "to satisfy the tropic-hunger of the North", and the pictures show the luxury.

It's still possible to be a passenger on a modern freighter, but not at that level of luxury.

https://history.state.gov/historicaldocuments/frus1952-54Gua... page on "Abbreviations and Cryptonyms" says UFCO, UNFC, and UNIFRUIT were used for United Fruit Company. The Danish Wikipedia mentions UNIFRUIT at https://da.wikipedia.org/wiki/CIA%27s_kodeord but the English one does not.
Hey, Dangerzone dev here. Just wanted to say that the temporary input file is actually within a sandbox - and there's one sandbox per file - so there's no collision with other files in the host.

> Someone could potentially use the underlying tools directly in their own needs workflow, or an expert in those tools could mention if there's a vulnerability / common mistake pattern.

Yep, that's something we cover in our about page. We process the untrusted document in a gVisor sandbox, that runs within a hardened Linux container, that runs within a Docker Desktop VM (in Windows/macOS). And yet, that doesn't mean that Dangerzone can't get hacked by a determined (possibly state-backed) attacker. So yeah, you have a point.

At the same time, using tools like this raises the "you must be THIS determined to enter" bar. This means attackers must spend much more money, time, expertise, 0-days, etc. These resources are finite, so more people are protected as a net result, even if we can't protect everyone. That's the way I see it at least.
Turn snapshots into showstoppers with a1.art! Animate photos and bring dreams to life in seconds. Play 6k+ "apps" of solo selfies, group pics, static images, GIFs, and videos. Dive into the future of photo-filter animation and watch your pics transform. A1 Art—because your memories deserve to be legendary!
I don't understand it either, a 16 GB DDR5 stick costs like $50

Not having enough RAM slows you work to a halt, I would always go a tier down in CPU or GPU to have enough RAM

And it's also easy to expand later
https://en.wikipedia.org/wiki/2022_United_States_infant_form...

protectionism (high tariffs)

market concentration (ie. suppliers dropping out of the market due to a government program favoring/subsidizing some manufacturers, thus distorting prices/preferences/demand)

recurring unaddressed problems at Abbott's plant until kids died :/
When he trashed the aldi espresso machine I think he was unfair. The main issues with it are probably the same issues you get on a Breville until you tune the OPV and get a seperate grinder. That said I dont think he is the screwdriver to espresso machine type.
I have a Quooker tap, and no kettle. It's a game changer in the kitchen, need boiling water for cooking and it's instantly available, and my wife can have tea in a second whenever she wants, no waiting around or boiling a certain amount in the kettle, also one less appliance on the counter-top.

The energy usage is indeed minimal; I've measured it with a power meter over a couple of months and barely used a fraction of a kWh.

There are other boiling water taps, but Quooker is incredibly well built, really simple, and was created in an era of making things to last, it's got a price tag to match, but well worth it in our households opinion.
Just like Option+Space for ChatGPT app on macOS. Seems to become the default AI shortcut
Feedback on your website: If you have designed a product and you are proud of the visual design show it. Don’t do a thousand different strange angles and moving pans around it to obscure what it actually looks like. The impression your site gives is that you’re trying to convince yourself that it might actually look good, but that you don’t really believe it yourself, so you are doing everything in your power to change the perception of it away from what people will actually see if they just look at it.
OpenAI's Sora lets ChatGPT subscribers churn out janky text-generated videos
Is X.com Down?
I can't open it since the morning in Switzerland.
Um, the shortcut for opening the system menu since Windows 3 (or possibly earlier)?

The shortcut burned into my muscle memory for closing, minimizing, moving, resizing windows with the keyboard?

Are they mad?
Show HN: Turn videos into pixel art animations in real-time (open source)
Turn videos into pixel art -- use your webcam feed or upload a video, then use the controls to adjust the color palette and pixel size.

All processing is done in real-time within your browser, using javascript / webgl shaders / html canvas. Github repo here: https://github.com/collidingScopes/video-to-pixel-art

You can export your creations as images or videos to save / share your work.

This tool is completely free, open source (MIT license). You are welcome to use it for personal or commercial purposes.
It's great, just NEEDS one thing:

Configuration export/import.
We have found both orientations on organic compound coming from space[1]...

while the risk posed by our own actions is way way higher, I wonder if we can find ways ways to protect from these lower risk scenarios in the future.

[1] https://www.science.org/doi/10.1126/science.275.5302.951
Working fine for me in Japan
I’ve seen this type of extreme self-deprecating personal branding before, and I wonder if it actually benefits anyone. I get the author is trying to be honest and likely venting built-up frustrations.

I skimmed the video, and I understand one of the key points is about realizing how many random variables may destabilize your career, even if you start from a good place.

Perhaps there’s a more effective way to reframe a challenging situation like theirs.
Are there any benchmarks of Windows EH? The implementation is very different from DWARF/SJLJ EH and it would be interesting to see how it fares. I've seen some pretty exceptional claims for both sides of the argument (e.g. "[...] has no code impact for x64 native, ARM, or ARM64 platforms" [1]), but there's rarely if ever any data to back this up.

[1] https://github.com/Microsoft/DirectXTK/wiki/throwIfFailed
A lot of the GenServer-information floating around explains code_change/3, no? That's commonly what you want, a way to handle state propagation when process code is updating in a running system.

Most people are probably running some web services or something and might as well shift machines in and out of a cluster or can wait for old processes to disband on their own, because the new code is backwards compatible with the one in already running processes, and so on.

It can also be relatively hard to do without causing damage to the system. Those who need and can manage it probably don't need it marketed.
Lovely design. Just a quick note to say that here in Australia, people are coffee crazy and would probably find a home for your kit. That includes individuals at home, but also cafes and hotel foyers etc.

Might be worth considering an AU plug as an option (we run off 240v).
> Are they mad?

Greedy, methinks. Soon you won't even be able to call Windows an operating system anymore, just a captive portal page for Microsoft to force products into your face.

Consistent UI/UX? Corrupted with lowest common denominator touchscreen crap. Settings for the owners of the computer? Being removed. Not having the thing reboot while you're using it? Too bad.

Screwing over keyboard navigation is just another facet of the same downhill slide.
It's at the end of the article
How much energy is that hot water tap wasting by keeping some tank with water hot throughout the day (and maybe night) for just a few cups of tea/coffee?
I don't have a comparison to a kettle because I don't have one, but our Quooker tap took a fraction of a kWh over a couple of months that I measured the energy usage, and my wife uses it daily for tea and we use it most days for boiling water for things like cooking.

The 3L tank that holds the hot water, under the sink is well insulated and it takes almost nothing to keep it at temperature.

Given that it uses such negligible energy that I needn't care, the benefits of instant boiling water whenever we like and not having an extra appliance no the counter-top make it a clear winner for us.
Are the numbers in the second table correct? For 2, 4, 8 and 16 threads it shows a speedup for 0.1% failures vs 0% failures. For 2, 4, and 8 threads it also shows a speedup for 1% failures vs 0% failures.

That speedup isn’t small. The largest one is for 8 threads, 0.1% vs 0%: 32 vs 64, so occasionally throwing exceptions seems to double the speed of that micro-benchmark.

Is there so much noise in that data? If not, what could cause this?
There's a difference. The people with MAID choose to die.

When innocent people are killed via capital punishment, they have no choice.

And it's not a "small minority" either. We don't have good numbers, but it's significant enough to be over 22% or roughly 1 in 5. That's not a small minority.

For Florida, since 1973, 30 people awaiting execution have been exonerated so far. The state has executed 106 people.

Out of 136 cases, 30 were shown to be innocent beyond any reasonable doubt. I have no doubt that there might be other innocent people within the 106 that were executed.

https://deathpenaltyinfo.org/policy-issues/innocence/innocen...

https://en.wikipedia.org/wiki/List_of_people_executed_in_Flo...
I suspect that's the demographic shift towards older average population.

I've only got anecdotal examples of old people preferring blander colours, hence "suspect" rather than "think".

When my dad died, my mum replaced all the furniture and carpets with blander versions of the same — in particular replacing the bold orange living room carpet and dark green patterned hall, stairs, and landing carpets with mild off-white.
Actual AI project manager here.
> So where do you draw the line? Maybe it even needs to be included in the post submission title? It's just ridiculous. Anyone thinking this is a problem needs to get their priorities straight.

...

I have the same thing for articles where I click on the submission title and there's a paywall. I want to know about the wall before I get there so that I'll know it's not worth the effort. Usually this is achieved by looking in the comments for an archive link so in that case I don't care about there not being a warning in the submission title because the comments allow me to enjoy the content anyway. In this case there's no need for a warning in the submission title because I go to the website and I get a neat idea, that's fine, no wall yet. There's a button to try it and that's where the warning should be that a Google account is required. Your argument is what's ridiculous.

See my other comment: https://news.ycombinator.com/item?id=42407232
Recently I found myself happy to find bug in code I have writtdn for those reasons.