skysight-inc/HackerNews huggingface dataset:
Oh man, in my experience, migraines in particular are the worst for this because a ton of the common "justs" are actively conflicting

"Just cut out caffeine/just try some caffeine when you feel one coming on!"

"Just get more exercise/just make sure you're not exerting yourself too hard!"

"Just get more sun/just make sure you're wearing sunglasses when you go out!"
Maybe Teardown would be interesting for you.
Hehe, yeah forget wasm, let's all use SVG :-)

I doubt that flash will ever get "replaced", not even https://ruffle.rs/ is feature complete.
Released Today: C#11 and Dotnet 7
Today Microsoft released the next version of dotnet, known as dotnet 7. It includes many enhancements including new language features to C#, which they are calling C# 11.

You can download the release of dotnet 7 here:

https://dotnet.microsoft.com/en-us/download/dotnet
As a native German speaker, I don't understand your problem. It's very much not opaque, plain terminology that easily conveys meaning. ;-)

Perhaps, we should compromise and name it after Leonhard Euler? That should clear up the confusion.
It means it doesn't matter where it is: you can choose the origin, ie the point you measure from, it is arbitrary. Or another way of saying that is you can move the system to a different set of coordinates and it works in the same way.

... which means it's probably an imaginary physical system.

Maybe a good physical example is a piece of cloth that warps in 2D, and shrinks, when washed? Eigenvectors would describe the warping (skew, say) and eigenvalues the shrinkage relative to the original warp and weft.

Steve Brunton on YouTube has really good videos on eigenvectors & eigenvalues in context of matrix algebra (and then applied to simultaneous differential equations); https://youtube.com/watch?v=ZSGrJBS_qtc .
SVG is XML, a screen reader would be able to access it.
And it's done: https://twitter.com/cz_binance/status/1590013613586411520 CZ Buys FTX
I remember back in 2000s when Cellfactor demo came out on youtube.

https://www.youtube.com/watch?v=QzIHI7y4ZG4

Which needed that separate physx card at the time. Wonder what ever happened to it.
I don’t really know what anyone is doing.

Im just wondering why anyone would feel better about an faq that really isn’t much different than anything else.

The application, I’ve no idea/ don’t assume any malicious intent or actions.
Built before you were born, maybe. I was born in 1965 and I've seen pictures of what my town was like back then. Even though the town itself is pretty old (being the birthplace of the American revolution and all) the particular section where I live was still mostly farmland. Even some of the main streets have been rebuilt, widened, or reconfigured for reasons other than wear and tear. That includes the town center, which was specifically widened for bike lanes. Do the millions of miles of roads for which these concerns apply not matter to you? Do you only care about the - possibly anomalous or even inaccurately portrayed - status of the roads immediately around you? Seems a bit callow to me.
Take an airplane... it’s dynamics are described by a series of differential equations. We want to know if it’s stable! If the wife values of the dynamics are real and greater than 1 it’s unstable. If the eigenvalues are complex and have a modulus greater than 1 it will oscillate instability. If one is equal to one, it will cause everyone to vomit.
https://news.ycombinator.com/item?id=33513421 <- Links to the same page, just not the same anchor tag.
> SBF says funds are SAFU for FTX US

Why would anyone trust this?
Honorable mention: I've been a happy pushover customer (not affiliated)
All I did was pay $5 several years ago and I still have 10k messages/mo which is good enough for all my automation so far.
I think the Telegraph article ( https://www.telegraph.co.uk/global-health/science-and-diseas... ) that this blog post is based on is a better read. It makes clear that the idea that the outbreak will become "out of control" is from an anonymous source, not the leaked documents.
Complex exponentials are the eigenfunctions of the Fourier transform. In other words, frequency component values are the eigenvalues.

https://en.m.wikipedia.org/wiki/Eigenfunction#Vibrating_stri...
For a completely different approach, see this answer:

https://www.reddit.com/r/explainlikeimfive/comments/1avwm7/c...
Can someone ELI5 what has happened here?
This is sick but replacing html elements with svg is going to be a huge tangled mess and you will be playing catchup forever. Look at huge companies with teams of engineers constantly trying to make sure their browsers render all html elements to spec. You are going to need to do the same with svg or users will get frustrated.

Maybe figure out a subset or a specific functionality that html elements struggle with but svg excels at, or present this as an alternative to a traditional webpage (like a page specifically for interacting with animations or playing a game or something). As far as building websites using only svg instead of html elements, that is a crazy lift to attempt.
> I wouldn’t like to rely on that “should”.

And you don't have to. Best always to hold your own coins yourself if you have that possibility, or use a custodian you trust.
How fast do you think the cars are going in the twitter video I posted?
I found some nice bookshelf speakers in a thrift store, which got me wondering if there’s modern amplifiers available which are compact for my desk and simple, i.e.: not loaded with software for airplay etc that will be obsolete in 5 years. It turns out they are easily findable on Amazon or aliexpress, and they are under $60 (although they were half the price a couple of years ago).

They generally have bluetooth, which I don’t see as adding the same type of complexity as airplay as there’s no network or configurable software component. I did research to find one with high quality components and a good Qualcomm bluetooth chipset.

I do have airplay available because it’s usually connected to my desktop PC with an airplay server running, but if my main use case was a standalone setup like the author’s, I think his solution of using a raspberry Pi is a better long-term solution than buying a similar amplifier which includes airplay. Then the amplifier has a good chance of being useful for decades.
> I was born in 1965

Before you were born. Maintained, expanded, resurfaced, etc.? Sure. Almost entirely because of damage due to cars and weather.

Also: hi, neighbor! Fewer that half of the dollars spent on roads in our commonwealth come from gas taxes [1]. If you're paying fewer than $200K in income taxes and/or don't pay massive property taxes, I'm almost certainly subsidizing your driving.

And, even if you have, there are a huge number of MA drivers who don't make that much and benefit from spending on roads made possible by my contributions to the state's general funds.

You're welcome :)

> Seems a bit callow to me.

Says the guy who's angry with people who find alternatives to consumption of a researouce whose current levels of consumption necessitate massive amounts of geopolitical violence.

[1] https://pirg.org/massachusetts/resources/who-pays-for-roads/
I think you've unintentionally explained why your advice-giving worked in that moment, too -- Bob knew you were coming from a place of good faith!

You weren't "just"-ing him -- you knew the intricacies of his situation, and it's a lot easier for someone to take advice to heart if they can trust that you actually know the context.
So after SBF came out yesterday and said FTX was totally fine.. it turns out they were insolvent and needed to get bailed out to cover withdrawals?

Never a dull moment in the world of crypto.
Clickbait. Please provide a title that says who and what material.

"Scientists synthesize material that may replace rare earth magnets"

("who" was two universities, so didn't fit a title).
At least the conversation hasn't progressed to printing it upside down or on the back...
Also in computer science.. a web sites page rank is the eigenvalue of the connectivity matrix.
Whenever there is a new subject I want to learn about, I find a support community for it and then start answering people's questions. In digging and pondering how to answer them, you are learning in a very practical and effective way. It's also win-win. You get to help someone else and you get to hone your craft. And if there are better answers, the more active the community the more feedback you will get from others. Obviously this works best if you are sincere and diligent in finding useful solutions and not just tossing out random crap - please don't do that.
Society won't gain much if a grocer keeps a steady 3% margin over base cost while capturing the increase in price instead of distributing it as part of salaries as well, don't you agree?

The record profit in figure is important when compared to employees' salaries, if those aren't increasing in proportion (as part of the cost) then the grocer owners are just increasing their wealth while impoverishing their own employees.
I suppose better said would be that as a person who was born in the post-industrial era and lived my entire life in the sub-tropics of South Texas, I don't really have an idea of the lived experience of dwelling through a real winter in pre-modern times. (Though I did get a taste of it in February 2021).
What’s the value of bringing up race in such unrelated topics? It makes everyone suspicious about your motives.

A group of people is having regular fun, eat food, exercise. Do you suspect they discriminate based on race?
Unfortunately, this is definitely not "responsive". It's effectively just displaying an image and then scaling it to fit as you resize your browser.

- It doesn't work properly if I resize the page after the page loads. E.g. if I load the page and then scale the browser window, all it does is make everything super small. It kind of works again after I refresh the page though.

- It only has a couple of scaling breakpoints. E.g. If I try to have the page take up half the screen while I do something else on the other half, the page's font becomes absolutely tiny. It also becomes unusably large on widescreens.

- Zooming does nothing

As far as I'm aware, the last two problems are not easily solvable when using absolute positioning like Svija does.
I've been chasing infrasonic ranges in home audio for over 2 decades. You can't "detect" these frequencies in the normal way. You experience them by way of your physical environment being excited by them. Feeling pressure waves move through whatever you are standing/sitting on can add an entire new dimension to the experience.

I used to run experiments with friends and family using a 800L ported subwoofer tuned to ~13Hz with a 40Hz cutoff. Not one person would mistake it for being on vs off. Certain content makes these frequencies substantially more obvious. Classical music performed in large concert halls is one surprising candidate outside of Mission Impossible scenes. Being able to "feel" the original auditorium in your listening room is a very cool effect to me.
If I were a lawyer for an injured motorcyclist, I would relish showing a defendant's comment such as yours to the jury.
https://en.wikipedia.org/wiki/Auditory_masking is pretty well established scientifically.
They write:

> To confirm that the VLFs were not consciously detectable, 17 new participants (one of whom participated in the concert experiment) completed a two-alternative forced choice task using the same VLF speakers in the LIVELab. On each trial, participants heard two pairs of 3.5 s excerpts from the concert audio and indicated which pair’s excerpts were different...participants could not detect the presence/absence of VLFs.

But yeah, not to be offensive, my initial reaction to this claim is that extraordinary claims require extraordinary evidence. Here's their claimed spectral production during the concert:

https://i.imgur.com/SX1A3SF.png

35 Hz sound at a weighted sound pressure level comparable to other bass audio should be audible. They write in the full article:

> At the lower end of the VLF range (10 Hz), intensities were below the threshold for auditory perception, and higher VLFs were above thresholds. Non-VLF intensities were by comparison, much higher relative to thresholds. Given that thresholds were determined by measurements using pure tones in silence, it is likely that in the context of the music at this concert, the non-VLF sound would mask all above-threshold VLFs.

Did they play the follow-up study at the same volume as the full concert? Either the VLF sounds are imperceptible and dancers should have no change in activity, or they're detectable and test participants should be able to distinguish their presence/absence, or your test is screwed up.

We had a similar issue come up when I was at school: To deter pigeons from pooping in the courtyard, the school installed "ultrasonic" bird deterrent speakers. Students complained about getting headaches from the intermittent, piercing, grating whistle that the speakers produced. (It was like nails on a chalkboard...just remembering it makes my skin crawl!) The elderly building maintenance staff could not hear them, and claimed that the speakers were inaudible, that no one could hear sounds over 20,000 Hz so our objections were unfounded and meaningless. We didn't have a lab setup like the one in the article, but just turning our backs to the flowerbed while the maintenance staff plugged it in and unplugged it was enough to prove that yeah, more than half of the students (including all of the students who complained) could hear it.
Just being XML doesn't make something accessible - I tested with a screen reader and found a lot of issues: https://news.ycombinator.com/item?id=33520364
Binance signs letter of intent to acquire FTX
Nobody here seems to know how pedestrians are supposed to play with roundabouts (the ones without stop signs).

On the streets with little or no traffic it doesn't matter, it's the larger roundabouts on already difficult to walk highways.
If you throw a party in the middle of a corn field and the town next over not the town the party is in has noise complaints, you're not having fun.

God bless the turbo soundsystem at the great beyond festival.
Thank you, this looks very useful. I will try the Python embedded mode when I have time.

I especially like the Datalog query examples in your READ project file. I usually use RDF/RDFS and the SPARQL query language, with must less use of property graphs using Neo4J. I expect an easy ramp up learning your library.

BTW, I read the discussion of your use of the AGPL license. For what it is worth, that license is fine with me. I usually release my open source projects using Apache 2, but when required libraries use GPL or AGPL, I simply use those licenses.
The CPU on xbox one/ps4 is very weak. Developers have to sacrifice physics.
Yeah of course they try to reduce the emissions as much as they can within physics. But the appetite for any emissions is extremely low in a peer or near-peer fight.
“Characteristic value.” I guess that’s a little better actually.
CZ - "I'm gonna make him an offer he can't refuse."
Maybe an extra $22K/year isn't a "huge problem" for the average twitter engineer with a family (although if you have enough to afford it, you probably want better insurance than that not-top-of-the-line $22K/year one), but I am confident saying it would be for most people!

Those numbers to me confirm that health insurance is part of what makes it hard for Americans to quit jobs.
Impressive. I wonder how much of this was planned by CZ.
The irony of an app called "lazy" that makes you scroll endlessly with your finger to advance through an animated gif.

Looks interesting though...
I would also love to see a simple explanation.
Here are some stats from last night showing the volume of messages:

IPs: 9756
Clients: 9980
- Google Play: 2796
- F-Droid: 5985
- iOS: 794
- curl: 62
- other: 343
Messages:
- Successful: 310076
- Failed (rate limited): 104741
- Failed (other): 6511

Top publishers (* = limit exemption):
22908 matrix.org*
22352 matrix.gateway.unifiedpush.org*
18286 up.schildi.chat*
16134 192.124.x.x
14056 matrix.envs.net*
13376 108.35.x.x
7794 114.132.x.x
6035 112.78.x.x
5432 88.99.x.x
5366 138.201.x.x

In terms of open connections, it varies, but right now it's 5k active connections. But there are many many self-hosters out there, and the people using Firebase (no "instant delivery") are also not counted in that.

You can subscribe to the stats above using the https://ntfy.sh/stats topic (old messages are only cached for 12h, so half the day it shows up as empty)
In what languages do maps shrink? You may be surprised.
Boneworks has very impressive physics and interactons, it is even advertised as "Experimental Physics VR Adventure."
For photos, I could perhaps recommend the following sequence:
1) Get an apple device where you're able to sync the _whole_ photos albums. This can be on an external drive, you can relocate the main library there. Make sure to select the option to download full pics and not to optimize storage.
2) Use this library help parse the photos.db database and write out your data however you wish (by album, or whatever). https://pypi.org/project/osxphotos/

I believe you can also do 2) just by itself and it will download photos as required, but I would still recommend fetching the whole photos library via Photos first.
Ask HN: Skeptical about my company going “full serverless”. What am I missing?
An Azure Cloud Architect has joined our company. They are recommending that all our web apps that are currently deployed in Azure App Services/ VMs should be (gradually) split up into Azure Functions going forward.

I'm skeptical - I was under the impression that serverless was for small "burstable" apps with relatively low traffic, or background processing.

The two products I work on are both REST APIs that send and receive data from a user interface (react) with roughly 60 API routes each. They have about 100 concurrent users but those users use the apps heavily.

The consensus on the internet seems to be "serverless has its use cases" but it's not clear to me what those use cases are. Are the apps I'm working on good use cases?
I'm the same way. Not to over-generalize, but in my experience that feeling is a big

1) guy thing

2) engineering-type thing

3) type-A-personality thing

and god help you if you're all three!

All three of those groups are overrepresented on HN, too, so at least you're probably in good company :D

I just learned that I need to stifle my automatic "problem-solving mode" when it comes to personal interactions, and all of my conversations got way better. Glad I was at least able to learn pretty early in my life!
This is very reminiscent of a favorite scene from the show Schitt’s Creek.

https://m.youtube.com/watch?v=NywzrUJnmTo
Things that vibrate have natural modes of vibration. A particular vibrational pattern can be decomposed into a time-varying linear combination of these modes. The modes of vibration are eigenfunctions and the frequencies at which they vibrate are the square root of the corresponding eigenvalues.

You can look up a vibrating drum head (circular membrane) for a simple example.
> Monoid

T AddAll<T>(params T[] elements) where T : IMonoid<T> =>
elements switch
{
[] => T.Zero,
[var first, ..var rest] => first + AddAll<T>(rest),
};

It is remarkable how functional C# has become. Not that it wasn't very functional already, what with LINQ and its (much more powerful than Java) generics but the above example really hammers home how much FP has inspired C#, on top of Ocaml's influence on C# generics[0].

[0]: https://github.com/ocaml/cwn-data/blob/9ee93e99d984b3f922e25...
The vast majority of finance people don't give a shit about the value of the product. Their business isn't to take risk or speculate, that is what your money is for. Their job is to give the people what they want, and earn hard-money commission. That is it.

I will say though: I think crypto is here to say, I think normal finance is here to say, they aren't incompatible. What I think was illogical was to suggest that blockchain was a substitute for very efficiently run operations (like custody)...but it could be used elsewhere (for example, having investment funds do transfers on a blockchain is interesting) because it is also true that other parts of the industry are pre-historic (anything retail-facing is usually expensive and poorly-run, the whole retail fund value chain is a joke).
The visceral feeling of walking into the heavy bass at Cream, a 90s nightclub in Liverpool, for the first time is something I'll never forget, and yeah much dancing ensued :)
I think you’re referring to

> However, let’s say we want to store one hour of data. Meanwhile, our company has decided to have a big promotion for Black Friday: in one hour, we may have millions of customers connected to our system. But a few days after Black Friday, our map will contain the same number of buckets as during the peak time. This explains why we can experience high memory consumption that doesn’t significantly decrease in such a scenario.

> What are the solutions if we don’t want to manually restart our service to clean the amount of memory consumed by the map?

I don’t see that as a strong argument for making the implementation of maps more complex by adding some auto- shrinking. If your process survived Black Friday with a map full of items, why would it run out of memory after it with a map that’s mostly empty but didn’t return bookkeeping memory to the heap? Your process likely will keep running. There may be a slight performance drop because cache lookups become more likely to lead to cache misses, but otherwise, the typical system won’t care much about the use of virtual memory space.
The "radical left" in the US almost entirely does not "align itself" with China and Russia. That's a red herring. Being highly critical of the abuses of capitalism does not automatically mean an endorsement of those also clearly abusive regimes.
And yet in the introductory classes teachers heavily insisted that "obvious","evident","trivial" shouldn't be part of your vocabulary (you would lose points) and when using a shortcut you should always reference it... until you got several levels above it (you wouldn't do it for basic arithmetic when doing calculus of course, OTOH in algebra commutativity is not to be assumed...)

Of course teachers/researchers didn't always follow these best practices themselves...
That's not true. The page rank is read from the eigenvector, and is the value associated with the given vertex (ie web page). There are as many page rank values as there are web pages, but only one eigenvector from which to read: the dominant eigenvector of the transition matrix, which is the one with the largest eigenvalue. So, only a single eigenvalue for the entire pagerank computation.
The headline is scary but #1 Ebola isn't airborne and #2 it's super deadly which means it kills before it really has a chance to spread widely.
> I wonder what the law is

As a driver you should already know what the law is in that scenario
> or use a custodian you trust

That's the point. A lot of "trustworthy" crypto custodians have turned out to be… not.
I lost about 6 years of photos through boring laziness.

A few years ago, I canceled my extra iCloud storage. Photos that I assumed were stored on my phone, because I was looking at them on my phone, were immediately deleted. I should have downloaded everything to a hard drive where I could see the files offline, but it was a pain(intentionally?) so I didn't.
Yes. Basically some processes failed to open the shared database.
It is super nice, isn't it? I am so amazed how awesome people in the open source community are.

As for the scale question: The server is already tuned for scale: https://ntfy.sh/docs/config/#tuning-for-scale

If you have any more ideas of what nobs to turn, let me know.