skysight-inc/HackerNews huggingface dataset:
I believe working on the weekends is a failure, and we should treat it like any other engineering failure. Why did it happen, how can we improve things so this failure doesn't happen again. Track and assign AIs, and hold people accountable to them.
Do you actually suck at this or do you have a great case of impostor syndrome (perhaps a pattern you're failing to recognize?)? You might be surprised at where you'd rank compared to the general population.

As far as retaining things, there's an awful lot of stuff where you don't need to remember the details - knowing something exists lets you go find details when needed, and the more useful items will stick with you after you start using them regularly. I'll use trees as an example - there are more different kinds of trees and ways to implement them than you can shake a stick at, but most programmers aren't going to need to implement any of them ever. Do you need to remember details about balancing, etc? Probably not.
My fist HN contribution.

A very small weekend project about how to build a working solution with a cheap Raspberry in less than 1 hour.

In reality, it took me a bit more (~2 hrs) because I was documenting the process, but shouldn't be the case for you.

Overall I'm happy with the result. It works well and it was very fun to do.
I don't broadly have beef with "SJWs", though I wouldn't use that term. BMI happens to be an easily recalled second metric that is useful for population statistics even if it's not necessarily always useful for an individual. Without some measurement like IQ we would miss things at the population level like the Flynn effect, or the massive improvements in intelligence brought about by the introduction of iodized salt.
Aerospace engineer here:

What a lot of people don't know is that the wings are actually installed on a small upward incline, relative to the longitudinal axis of the body. Think of holding your hand out the window of a moving car, and then tilting your hand to catch air under your palm. In aerospace we call this the Angle of Incidence, and most aircraft have a small amount, usually in the 1-5 degree range. So while you might be walking on a perfectly horizontal path as you go to the bathroom over the Atlantic on your way to Paris, the wings keeping you aloft are actually angled such that the leading edge is higher than the trailing edge by a small amount.

Now google any picture of an airfoil and notice that many of them are slightly concave on the underside. This is called Camber, and in a nutshell it creates a "cupping" effect under the wing that intensifies the high-pressure area under the wing and correspondingly increases the amount of air deflected downward. Additionally, the teardrop shape reduces the tendency of air to billow off the trailing edge of the wing in favour of kinda sticking to the wing's surface and following its curvature. This also causes downwash off the trailing edge (i.e. more air going downward, which is a good thing).

That's really all there is to it, from a high level. The wings deflect air downward such that the total momentum change causes an upward force that is exactly equal to the aircraft's weight, and that equilibrium of forces keeps the aircraft aloft.

Obviously it gets more complex than that, because guys spend entire PhD careers researching edge cases, but there's no magic involved.

Note that wings don't have to be of the classic teardrop shape. There are plenty of research papers about lift forces on flat plates. In fact that's classic fodder for an undergraduate assignment. The airfoil shape is beneficial in several ways, some of them quite subtle, but you can think of the airfoil as being the most efficient cross-section for a wing known to science, whereas a flat plate is much less efficient (though it still works).

>I even heard we don't completely understand why it works (?!?).

I don't think that's true. For a while there was the meme about "science says bumblebees shouldn't be able to fly" but that was a clickbait headline because we didn't know enough about the structure and motion of bumblebee wings. That's about all I can think of.

There are certainly areas of ongoing research and exploration (I'm thinking hypersonic flight, novel means of propulsion, aeroelastic structures, etc.) but in general, the physics behind conventional aircraft are quite well-understood.
Oh my god that is a beautiful shot! The rest of these are also gorgeous... how do you develop them? / do you do prints at all?
I'll be downvoted on HN, but those are pretty stupid examples.

1) Group By Nth column is a shorthand syntactic sugar. No SQL user would use it to turn that into an expression.

2) Similarly 'a+1' and '1+a' is another stupid way to express anything.

General theme of the post is the author is trying to use SQL as some turing complete programming language instead of it's true intention "A shorthand to express relational algebra in an elegant enough fashion given constraints for mathematical notations"

Once you get this and understand the powerful transformations you could do with exbytes of data with trillions of rows, using SQL (and relational algebra), you'd stop worrying about silly things like this.
In the US, that's actually kinda surprising to me. Even in the suburb where I grew up, where there's no obvious overall grid system and instead the streets tend to meander around, parallel streets in the same neighborhood tended to share a lot of numbers.
So can they still do traditional deterministic(?) calculations? Or would that be somewhat akin to using machine learning to do your taxes; possible but just overkill?

I've often heard it said that Quantum Computers can crack cryptographic keys by trying all the possible inputs for a hashing algorithm or something handwavey like that. Are they just spitting out "probable" solutions then? Do you still have to try a handful of the solutions manually just to see which one works?
> so if you copy and paste code from Stack Overflow (who doesn't?) it's essentially the same as including GPL code.

Oops...

What do I do about this? Describe the 5 or 10 lines of code to another programmer and have them write a re-implementation of it?
The twin paradox. All explanations seem to be just "something something one twin has to accelerate"
In short I'd say you need to understand the underlying mathematics to intuitively understand the operations that underpinn the algorithms. And since this is quantum mechanics...there's no real ELI5 version that can give you any useful understanding.
>I bet one of them will cite your comment as an evidence of my "immaturity".

I have no clue whether or not your hunch is valid, but in the interest of good will I edited the comment; too late for a delete from me.

Good luck, I hope your voice gets heard.
I have two quite bright nieces. When I was explaining the equivalence principle to them, right away they saw that in the gravitational field of the earth there would be tidal effects and in free space with just acceleration, none.

I had to apologize and say that the explanation was over simplified and really it would work, say, only for some creatures living exactly on the floor of the elevator.

One of the two, at a challenging high school, made Valedictorian (surprise to her parents who didn't know she had long been first in her class) then in college PBK, got her law degree at Harvard, started at Cravath-Swain, went for an MD, and now is practicing medicine. Bright niece.
> Can it be dangerous to post your MVP on "Show HN"?

The short and obvious answer is: sure, it can be.

You might get cloned by someone with an advantage you don't have at the moment, before your product can get the traction it needs to become sustaining. It's far easier (in all respects) to clone something in the earliest stages than to go through the painstaking, time consuming process of working through all the twists and turns it takes to figure out how X fits with Y. It's a weird, complex problem - when and who to show a thing to - that you're unlikely to find an easy answer to, it really can't be modeled perfectly. You don't know who is out there reading HN that might kick your ass. That's a coin flip. This site is filled full of technical talent that can rapidly clone anything you've produced, so if they have any other advantages that you lack, you could certainly be helping someone take you out.

Some people here will retort that that just means you were doomed anyway. That doesn't inherently follow. Getting an early momentum advantage such that you get some good entrenchment before the clones attack, can make all the difference, even if someone comes at your product with more capital to spend than you have for example. To the extent you get any entrenchment, you become that much harder to displace easily.

The ideal is to deliver your product to the audience that wants it. If the technical audience on HN are not the best audience for your product, do not present it to them.
The battery problem seems to be an Apple thing. iOS can shut the app down if it is in the background, and will do so if the battery is getting low. One solution is to keep it in the foreground - but that does chew power.
If one fifth of New Yorkers have this isn’t the cat out of the bag? What do we accomplish with contact tracing?
Sadly most people aren't particularly enthusiastic about their work, which is probably a huge waste of human potential, but it's not an unusual situation to be working just to pay the bills. Paying bills is good.

It's probably a good idea to keep your day job while you develop interests outside of work and investigate other job options. School can be good, but it can also saddle you with expensive student loans that take several decades to pay off.
That governments are taking advantage of the COVID-19 crisis to effectively 'mandate' tracking is about as sinister as it gets. Governments are playing on people's fears to overcome privacy concerns that they would otherwise have in normal circumstances; moreover, they're making it appear both normal and reasonable to be tracked.

I rarely take my phone with me when I'm out and about and this has been the norm with me for years. I wonder how long it will be before I'm stopped in the street by police who'll ask me to present my phone for compliance inspection and when I report that I don't have it with me then I'll be fined.

To avoid tracking, some people I know take a different approach which is to turn Airplane Mode on until they actually want to make a call. I wonder how long it will be before Airplane Mode in phones is disabled by mandate.

I can foresee a time in the not-too-distant future when someone who doesn't want to own or use a phone will actually be mandated to do so by law. When that time arrives then we'll know that...

..."We've won victory over ourselves. We will have learned to love Big Brother."
I guess this post is a little bit different, because VMs are designed to be portable across different hosts. Even hypervisor software without live migration still lets you freeze the VM’s state to a file which can be copied to a new host. However, an already running process is not designed to be portable in the same way.
I think I see the value of RedHat, but I don’t think it makes sense for every project to have a RedHat equivalent.
Houses in the U.S. are largely built by profit maximizing developers who know that the typical American homebuyer cares more about total square footage than essentially anything else about the house. Is it big? Does it have a nice facade? I'll take it! Houses are typically built exactly "to code", rarely above it.
HN has balanced discussions because of the voting system, moderators (banning voting rings and spammers) and that anyone can voice their counter-arguments.

Advertising on the other hand is one-sided. If there was a universal ad platform where people could vote on ads (where overly negative feedback would get the ad taken down) and comment below them then it wouldn’t be that much of a problem.

Finally HN is something you choose to participate in in your own time. Advertising doesn’t give you a choice on whether you want to see it.
Sayonara sunlight, hello neighbor.

This is the sort of thing that markets solve really well. If you want a dwelling unit with those properties, pay for it. If they're less important to you than cost, don't. If one is $300,000 and the other $600,000, it's very reasonable to choose affordability and go to a park.
That said, Seattle has a grass roots effort right now to try and get social housing on the ballot for November. There are folks here fighting for housing as a place to live, not as an investment.
Huh? SQL isn’t meant to be a general purpose programming language like JS/Ruby, it’s a DSL. Many have tried to create “better” DSLs for interfacing with DBs, and they’ve basically all failed, because SQL is just too god damn useful and well designed. Also, it’s every bit as useful for application developers as it is for analysts, the statement that SQL “generally regarded as an ‘entry level’ language for analysts” couldn’t be more wrong.
Why exactly are you upset by this? It's a word that describes commonly used narratives. It's incredibly common to tweak or reuse commonly known narratives and there's nothing inherently negative about that.
Most of these are “play stupid games, win stupid prices”, not things you’d encounter in normal usage.

Queries like `select a, b from nums order by 2` are nonsense. And sure, you can create tables with weird names if you want, but that’s not really a problem.
Thanks. An interesting and fascinating read. I hope more research is done on the topic: from my semi-untrained (I work in oncology, not in virology, although I studied the immune system for about four years in my career) there far more models around than experimental data (which is obviously far harder to gather correctly).
This looks very interesting! I will try it this week. It's always amusing when someone is called on in a meeting and you can tell they are trying to find the unmute button because it takes them forever to respond. My mic has a mute button on it but it's in a really awkward spot.
Apologies for not reading all of the numerous comment threads about Australia's contact tracing app, which went live yesterday and already has over a million downloads according to the verge: https://www.theverge.com/2020/4/26/21237598/australia-corona...
Quite a few comments to read in this HN submission: https://news.ycombinator.com/item?id=22986147

I'm wondering, for my fellows of you who think privacy is extremely important and oft neglected, what minimum criteria would need to be met for you to consider using the (NZ) app?

So far I've been comfortable with the measures the govt has taken and I think a contact tracing app could be an excellent tool to implement, short of the total collapse of our economy due to continuing lockdowns, or exponential spread of the virus and collapse of the medical system as is being seen in Japan. Or maybe we don't need an App at all and can avoid these scenarios.
There are no silver bullets here. It is always alot of work.
Has someone that thought they were taking LSD ever turned into a permanent schizophrenic zombie or in a mental institution, or is it all urban legend. If someone that didn't know they were predisposed to mental illness, is it applicable to dismiss their experience in order to maintain how safe LSD is?

If any of this is true, are there any sources aside from "my friend's friend's brother took too much and now he is....", and what is the scientific explanation and do we know enough about the mind at all?

I feel like LSD has a lot of contradictory information out there, and the proponents feel the need to hand waive concerns away because it is 'completely harmless and leaves your system in 10 hours'. But when nobody knows what they're actually getting because it doesn't exist in a legal framework, then it muddies the whole experience.

People say certain doses can't do more effect than lower doses after a certain threshold. It seems like the same people say "omg man 1000ug you are going to fry your brain!"

What is the truth? If it "just" had an FDA warning like "people with a family history of schizophrenia should not take it", that would be wildly better than what we have today.

Please no explanation about shrooms. Just LSD the 'research chems' distributed as LSD.
There was a big backlash in the last days in Germany over the intended central server solution favored before. More than 300 experts and groups warned about privacy implications.

It seems mentioning Apple in this regard is more used to not completely lose the face for the German government and the Helmholtz Institute that favored and developed the centralized version over the decentralized one. Please don't fall victim and paint Apple & Google as the bad boys here. It would be a horrible idea to force them by governments to implement a centralized protocol.
"Pound foolish" is not a necessary outcome of "penny wise", in this saying, but "the pounds will take care of themselves" is. Taking care of the pennies works when one is, at worst, "pound neutral". But being "pound foolish" is an additional condition in the saying, which is not accounted for in the "take care of the pennies" saying.
Thanks, appreciate it! Check out this comment: https://news.ycombinator.com/item?id=22991028.
You can't imagine how one could possibly acquire rice in less than 3 days?
It is entirely possible to curate a Twitter feed of: experts in nearly any subject, gossip, sports, pornography, spiritual guidance, comedy, hate speech, or journalism. The same can be said of bookshelves. It is also possible to consume both excessively or in inappropriate situations. There are young members of my extended family who are regularly scolded for trying to read books during meals.

The rudeness of your guests does not justify passing judgment on millions of people with an almost infinitely broad spectrum of usage patterns, and makes about as much sense as criticizing those who read words on paper.
I have seen the example with the polarized lenses in a few places, but they dont explain why (imo) the simplest explanation does not apply. Namely that the lens itself might disturb the phase of the light, which would then mean it can pass through the next lens.
How does one go about identifying a non-quack in your field? I’m in the market and I’ve been disappointed with the 2 I’ve seen...
that house looks great for $850/mo, and a bmw out front to boot. where do i sign up (in LA)?
Although do note that those factors don't fully cover the differential. Even in Hudson County or Contra Costa County, you're gonna have a hard time finding a 3 bedroom for $300k.
Watch how to light a bulb in an easy way
My theory: self-correcting action on the front tire when moving forward.

When the wheel pitches to the either side, the road under the bicycle pushes the wheel back to center.

When the bicycle leans to the side, the wheel pitches as well. Now the road under the bicycle pushes the wheel back towards center, but the angle of the tire to the road is also skewed, so the some of the force also gets translated into pushing the bike upright.

It's a little reminiscent of the self-centering action you get when you have a double-cone (or cylinder tapered on both ends) rolling down two rails.

I think if you fixed the front tire so there was no steering, you wouldn't get any stability from speed.
Iirc commercial building values and high rise tower condo prices in central Tokyo are up due to PE / speculation.
It doesn't. It _interprets_ x86. There's a similar project to do this for RISC-V, but it's not on TestFlight. I assume this pick the LLVM IR? It's an interesting question what the optimal IR for this would be, but it would probably be higher level than this, maybe more like WASM or the Zinc (O'Caml IR).
I beleive there is also a lack of literature on how useful a contact tracing app would be in the first place. Even for lack of studies, releasing the modelling and assumptions would be useful. Some considerations:

* Possible increase in false positives bogging down testing regime?
* Surface-based (i.e. location-based) contact events (e.g. elevator button)
* Effectiveness on health-care workers, who themselves will likely be in contact with infected people a lot, perhaps despite having sufficient PPE.

I get that it won't be perfect, and doesn't need to be perfect, but I'd at the least like to see some modelling to see what they've considered, and how likely useful the app will be.
Here's what Scott Aaronson says in regard to "trying all the possible inputs": https://news.ycombinator.com/item?id=17425474
When you don't want to run everything through a slow emulator
Ok fair enough. I admit I regret this comment and think I posted it a bit hastily, I tried to delete it a few minutes ago but it appears to be too late now. I edited out the part about dinosaurs though.
> As I said before, the iq test mainly measures how much the participant is motivated... Or so many other reasons which are loosely correlated with professional success such as enjoying puzzles and figuring things out etc.

This is wrong, and somewhat obviously so. Most people taking an IQ test have never taken one before, and have no preparation. Some of the biggest IQ datasets come from military enlistees. If IQ were not correlated with nebulously defined "intelligence" and were instead some measure of "motivation" and "enjoying puzzles" we wouldn't expect to see it improve generationally with access to better nutrition and early-childhood education. We also probably wouldn't expect to see significant improvements from the introduction of iodized salt, which alleviated shortage of iodine, critical for early brain development, on a population scale.

"Iodine deficiency during development impairs motivation and enjoyment of puzzles later in life" is a much less plausible claim than "IQ correlates with what we commonly understand to be 'intelligence'".
Also the volume of material to be delivered is phenomenal. There's a completely mercenary reason to try to deliver everything you can - storing things costs money and you aren't in the storage business.

This is why I don't pay merchants for any sort of expedited delivery. I live in a major port city. Any self-respecting delivery business has a depot in this city - some have several, which means any products destined for me aren't going via the far end of the country, or to a city I've never visited, they are definitely coming here ASAP.

And once they are in that depot they are taking up space that the company pays for. The sooner my package is on a truck and delivered, the less it cost to store it, and the more profit they keep. Now, if I paid for the most expedited delivery, perhaps my package would make it onto the very first truck and I'd be the first stop and I'd be woken by an anxious delivery worker buzzing me. If I ever need something for 0800 the next day I'll keep that in mind. But if I'm a little bit more patient the next truck, or the one after, will have some space and my package goes in that truck. Maybe if I'm unlucky the product arrives at midday. Good enough.
sign me up.