skysight-inc/HackerNews huggingface dataset:
The elevator car is a thought experiment that draws attention to the equivalence in sensation of acceleration on one hand, and being in a uniform gravitational field on the other hand. As you correctly point out, this particular thought experiment breaks down when you consider that all of the gravitational fields that we are accustomed to are non-uniform, and have apparent tidal forces.

The real principle of relativity is a bit more subtle (sometimes called the strong principle): that the effects of gravity can be explained entirely at the level of local geometry, without any need for non-local interaction from the distant body that is generating the gravitational field. To describe the geometry of non-uniform fields, we need more sophisticated mathematical machinery than what is implied by the elevator car thought experiment, but nonetheless, the elevator example is a useful launching point for that type of inquiry.
Gravity. Gather enough stuff, and you end up with balls (unless you spin things really fast).
I wrote the article. I agreed. It's a bad joke. I have no intention causing harm to this system.
Full of armchair experts, and top-lists-huge-landing-image ego postings.

Their platform is excellent, their content not so much.

>The most important skill that you should develop to improve your life

This is dev.to in a nutshell.
> why would a landlord kick out a previously good customer

I don't think they did. If I owned a small restaurant or a book store - having been closed for a month would be devastating in itself. Seeing no light at the end of the tunnel (another month to re-open, and then probably months of very few customers, on top of a crazy unemployment rate) I'd voluntarily cut my losses and settle with landlord to end the lease early. I'd assume that what had happened.
Two words: Scott Manley:
https://www.youtube.com/results?search_query=scott+manley+or...
You are talking about two very different retail models. Few local stores actually manufacture goods. They are getting their stuff from a wholesale supplier, same as Amazon and other online stores. Your online package coming from a physical store in a premium retail location is just going to add extra cost and inefficiency to the process.
I feel bad that you are experiencing this problem. If "promoters" stopped putting out ridiculous "call to code" YouTube videos etc. you and many others will probably not be having this problem.
If you could make a disc shaped planet appear with a magic wand, and imparted it an initial angular momentum, over time the gravity differential between the middle and the edge would either tear your flat planet apart, or shape it into a blob, and eventually a sphere.
That's not how lift works, don't be part of the problem! http://cospilot.com/documents/Lift.pdf
Immigrants and Billionaires: Why Are We Blaming Them?
Social media has made it all about narcissism, display your talents 24/7, failing which you are assumed to have a total lack of talent or interest. You are following your instincts and running counter to the herd, which in itself makes you a free-thinker. Trust me, you don't want to wake up one day, and not feel like you did not "live" your life.
There are two effects here. One is special relativistic time dilation, and you can derive these effects with very little mathematics (high school is enough). The Wikipedia page has a simple proof, but it's important to realise that this is a result of the postulate that the speed of light is constant. If you travel at 0.99c and emit a photon, it still travels at c, not 1.99c. It's absolutely not intuitive why this should be the case.

The other effect is that time in a strong gravitational field runs slowly.
“Drooling scroll zombies” is a wildly and unnecessarily uncharitable description of people that visit websites and apps that you (apparently) don’t enjoy.

Disparaging entire mediums makes little sense. There is both enlightening and mind-numbing content on social networks, blogs, television, and books. Are people that read many books drooling page-turning zombies? Is scrolling through blogs inherently superior to Twitter scrolling?
Electrons have both angular momentum and magnetic momentum, these have fixed magnitudes and they are always parallel.

The situation is somewhat similar to a classical spinning charged sphare, although this similarity easily breaks down.
> Kinetic energy goes as v^2. 2x speed is a 4x car crash. An extra 10 mph is worse at 60 mph than at 30 mph. (40^2-30^2 vs 70^2-60^2). Same 10 mph change, but 2x increased pain.

This should be taught in school.

There's very little cross-disciplinary teaching in schools, each subject is taught separate. But I'm sure a lot of teenagers would drive more carefully if they got a grasp of the concept that whatever your velocity is, if you hit another car, the energy on your body is velocity^2
I have no idea how it works, I don't have an explanation, I just know the one spouted by people doesn't make sense
Yes, this exactly.

If you want to dig deep into computer science history, you’ll note that LSF was once a slightly modified Condor. There’s a wild history between the two and U.Wisc and U of T.
Excellent question! This is what my whole business is about!

While the efficacy is the same, the difference is in the timing. In my testing those pills take ~10 minutes to dissolve, maybe 5 minutes if you are rolling it around on your tongue...for the entire 5 minutes. As a novelty food, it does the trick, but when you're rushing to get your kids to school or in a hurry to get yourself to work you don't have those 5 minutes to get it dissolved before breakfast (assuming your child even has the patience!) You can check the full video in the description but my product takes 30 seconds - 1 minute to dissolve. That's a 10 fold difference. Not only is it convenient but it is also effortless to coat your entire tongue - the surface area does it on its own.

The pills also have a chalky texture and a raisiny taste that not everyone enjoys. While I am still working on the flavor, i have received great feedback saying that it "tastes like a healthy fruit roll-up".

In terms of the fresh fruit, it is highly perishable (rots in <24 hours). It is also very inconvenient. It has a very large pit and the flesh is hard to remove from it. Also you have the problem with variability in fruit size. My product is standardized so you always know what you're getting.
iPadOS supports this completely, as long as the application is written with the external screen APIs in mind.
This is nuts. A 30yo gets sick, infects a 60yo who goes to hospital and lands in ICU.

30yo then gets unrelated disease (chain saw accident. Burst appendix. Slipped in the shower.) Goes to hospital.

Repeat this often enough and suddenly you have a crisis in which there are not enough health care workers and beds, and now all ages are dying equally.

The idea that young people are not affected by this is just braindead stupid. Older people like me are directly affected; younger people indirectly. But we are all in this together.
There are always poseur idiots in any movement (see the "Blockchain!" zombies and "Raw Water") but the political correctness is a result of actual moral standards based upon harm and could be called a successor or an usurper backlash to the hypocritical "morality" that was utterly obsesses with sexual norms while ignoring every other aspect of it. It isn't spoken of in such terms usually but what "political correctness" generally is referred to as detractors is essentially "new morals".

They were judged unfairly by a broken, hypocrital and insane system and now they flip the table and judge it back harshly. The failure of the previous generation's systems of morality is literally a meme "Ok boomer" - and it certainly wasn't the first to judge back.

There is still plenty of status shit in various forms going on top which matters to varying degrees subculturally if they give a shit or not but there is still a recognized objective moral "line in the sand" roughly where excuses aren't tolerated. "Everyone was doing it" as an excuse only further indites a complete lack of morals. A standard which evidently terrifies many who were alivr during the judged segment part of the everyone given the jump to embracing moral relativism.
RedHat (or Ubuntu let's or SUSE Linux enterprise) have reactive support: call them if something goes wrong, and the, have proactive collaboration with paying customers.

If you think you don't need that: use free riding flavours i.e. centos/ SUSE leap/...

Tech support can tell by looking at the system if you are a paying customer or a free rider. And sales can look at the download numbers and management servers if your installed base is what you claim it is.
Yeah the problem is that that the equivalence principle is a _local_ property that cannot really be expressed precisely in standard English.

Clearly it will fail given a big enough lift to experiment in, since a big enough lift would essentially include whatever object is creating that gravitational pull (or enough to conclude its existence from other phenomena). However these effects are nonlocal, you need two different points of reference for them to work (like your two baseballs). In fact most Tidal forces are almost by definition nonlocal.

The precise definition involves describing curved spacetime and geodesics, but that one is really hard to visualize as a thought experiment. The thought experiment does offer insight though, as it is possible to imagine that, absent significant local variations in gravity, you cannot distinguish between free-fall and a (classical) inertial frame of reference without gravity. This insight provides the missing link that allows you to combine gravity with the laws of special relativity and therefore electromechanics, including the way light bends around heavy objects, which provided one of the first confirmations of this theory.
Sustainable work-life balance with Personal SLA (2019)
Every generation has told the generation younger than them that they are not pulling their weight. I am Gen X, and I genuinely feel the Millenials and Gen Z, are getting the short end of the stick. Fuck the boomers,they shat on everything.
Mike my concern as a scientist about this app is it may not help much at this point. If it is only picking up people you spent more than 15 minutes talking to it is going to miss a lot transmission events.

Do we have the contact tracing people to actually make use of this data? Even if we did I can’t see how we are going to avoid the need to interview each positive case to find all the people they came into contact with for less than 15 minutes. How much value is being added?

I am not installing it purely because I am social distancing and won’t be spending 15 minutes talking to anyone face to face outside of my immediate family.
Blink is mosh based... works great
An average family in Tokyo can own a new house for $850/month
The featured article's pitch is that there's still way more historical writing about war, including ignoble stuff, and this imbalance still strongly suggests that PTSD was somehow much less common.

(It's also funny that the BBC article mentions the strong Herodotus PTSD example that the featured article treats as a repeatedly-rehashed outlier.)
Show HN: Content database and collections for learning from all over the web
I'll bite. I used to enjoy programming just for the fun of it. By that I mean the satisfaction of getting the machine to do what I wanted it to do (never mind the huge psychoanalysis of emotional neglect here). I would still write programs that interested me, but the satisfaction tended to come from making it work. Imagine making games but not really caring to play them.

I've moved past that. I still write software but now it's more a means to an end. It's best if I'm working on something I care about and code is just how to get there.

It's not all one or the other though. I started learning Rust and that's kinda cool on it's own because it's no so tedious as C++. Point is that my interest in writing code has shifted a lot and I still do it.
It’s not better (or worse) imo, it’s simply another bias. It’s just one that moves the numbers in the direction counter to some of the other, more well discussed biases.

> with somewhere that large you have decent statistics on expected rates

I wouldn’t make that assumption. I can’t think of any place in the world that has the ability to collect this data with any sort of scientific rigour. It’s simply not possible at the moment, and without that you have no scientific basis to know what to expect.

> Agree that this years flu analysis will be interesting, but on the overall statistics nobody competent is going to conflate them with covid-19

I wouldn’t make this assumption either. If you attribution criteria includes dying in hospital of Covid-like symptoms, then it also includes dying in hospital of flu-like symptoms, because a severe case of flu and a severe case of Covid present almost identical symptoms. The US has had ~55k Covid attributed deaths so far, in last years flu season, it had ~35k flu attributed deaths. The potential for misattribution on that basis alone is significant.

The general point I was making was that not all of the confounding factors apply downward pressure to the stats, some of the provide upward pressure, and depending on methodology, you’re going to get a different set of confounding factors from place to place.
Well, if you're uncomfortable with LIGO, you're in good company. Once a whole decade went by in physics where people couldn't agree if it would work in principle or not. And it is true that a lot of common explanations are bad (e.g. "it's just a ruler" is not complete by itself because "why doesn't the light get stretched too?"). Nonetheless, today we have a variety of independent explanations.

Maybe you'll find this paper helpful: https://aapt.scitation.org/doi/10.1119/1.18578
See: Simpson’s paradox, where trends in subgroups, taken together, can indicate a different trend.

https://en.wikipedia.org/wiki/Simpson%27s_paradox
I started to read the first one but his insistence that Many Worlds is true was too frustrating. Many Worlds Theorem seems specifically useful at saying "the variables aren't hidden because everything before wavefunction collapses actually plays out in different worlds.

But, we specifically have no way of proving that theory. So now we're back to the essence of the original question - if these things seem random why do we know that they're in fact deterministic without any hidden variables?
"Customers and end-users never ask for software that is complex."

They do if they are expert users of very complicated toolkits. Look into any art toolkit, for instance. 2D or 3D, as they age they add on more features. Some of these features come from the dev team experimenting, some come from cloning good ideas in the competition, some come from user requests. There's a pretty steep learning cliff for Photoshop or Maya or Procreate or Blender. There are a lot of settings in these things because there are a lot of ways people use these things. And a lot of tools in these toolkits, many of which have their own particular settings.

Power tools that let you do fundamentally complicated things have a level of inherent complexity.
We were having hard time to find great content because of all the fluff content out there. There is a lot of great content on web but it's so time consuming to find great ones. We had to open dozens of tabs and read/watch 10 content to find a great one.

So, we are building content search platform which you can find content

- rank content or search results
- create and follow collections to learn new things
- Take advanced notes remember what you learn

We make the internet, you library. So, you can find great content in a glance, save your time on learning instead of searching.
Reuse Compliance Check GitHub Action
Solid advice. I wish I'd heard this back in 2016. Thanks.
Entropy is measured in bits (they exact same bits we talk about in computing), this can help unify the ideas of information and randomness:

Which file can contain more information: a 1.44 MB floppy disk or 1 TB hard disk?

Which password is more random (i.e. harder to guess): one that can be stored only 1 byte of memory or one that is stored in 64 bytes?

Information theory deals with determining exactly how many bits of it would take to encode a given problem.
Ah sure. I interpreted "proven correct" to mean "proven correct wrt a set of invariants" in this context.
Not Einstein: https://quoteinvestigator.com/2013/04/06/fish-climb/
What if moon fell to Earth
Going to a university that's top in your field is perfectly fine for anyone who intends to go to a FAANG, take it from me. Tech employers care about what you can do with your education, not where it came from.
fork/exec create a huge amount of complexity, and it's possible the NTCreateProcess API is a better API, even with it's tens of arguments. You have to keep n things in your head while doing fork(), like what happens to signals or threads.
And frickin RSS!
That was the content collaborator before Twitter.
I've cited the USA and UK, two western, English speaking countries.
ah, I see what you're saying. Luckily, I've looked into this specific topic!

Myopia is definitely hereditary, especially the pathologic variants that can lead to retinal tears and the like.

That being said, there is the process of refractive development that occurs early on in life. The eye develops at a frighteningly fast pace, and you achieve near-adult globe size after about 18 months. The genes that drive this refractive development could be hereditary, if that is what you're trying to figure out.

Now, we can make a claim that this adaptation during infancy could eventually affect our genome, but I have not delved into the epigenetic literature to determine if that has been borne out or not.
If you take some ball of charge and actually spin it, and then place in inside a magnetic field, it moves in a certain way. If you take a single electron and place it in a magnetic field, it moves in that same way as the ball of charge. Ergo, its natural to call the relevant intrinsic property of electrons "spin".
Which headset was that? I’ve been looking for one with a cardioid mic but wasn’t able to track any down.
> Software developers are not qualified to write about this.

This applies to almost everything posted on HN.
Out of curiosity, are there any common themes on why that person (ie Brent) sticks around? Part of me wants to say that if a company is so disfunctional that one engineer (or a handful of engineers) prop it up, it deserves to fall over
AutoIt is pretty powerful and good for learning basics of programming. I last used it a decade ago and it was surprisingly powerful.
>I have no intention causing harm to this system.

I took that intent from the article, but 'professionals' aren't always as kind in their reading of things like that.

Interesting article.
> Programming as a career is rarely fulfilling to anyone.

I think this is unnecessarily controversial. "Rarely to anyone" needs evidence. Plenty of happy programmers around.

I get your (or Zed Shaw's?) point though. There's nothing wrong with wanting to be a programmer, but programming for the sake of programming is a fast way to get bored or to burn out. Programming is a tool. It doesn't hold inherent value without being applied to a particular problem. So find problems that you would like solved, or at least find out what sort of problems you enjoy solving.
Related: would this tool let me analyze my gmail for cleanup? That is, identify which senders/domains send me the most email by number or size. Some way to automatically download large attachments and then deletes those. I know there are 3rd party apps that do this, but I don’t like giving access to random 3rd party apps.
Just now discovered psychedlics, yet founded Be Inc. Interesting.
RHEL (CentOS) is only a small piece of what Red Hat offers. If all you want is a base RHEL system (that can be a week or two behind on non-security patches but is otherwise the same), and you don't need any support, then yeah I'd do that (and I do in fact. I use CentOS for personal stuff all time). Since all of Red Hat's stuff is open source, you could install them all individually just fine. I think of Red Hat as more of a competitor to cloud companies than to Linux companies. A lot of what we do is help people build their own private clouds on the hardware they own. RHEL is at the foundation of course, but RHEL is very rarely the end goal of the customer.

If you are doing this at scale, you're going to end up paying way more in salary to employ people to do it than you would if you just went with Red Hat support. And since early in an effort you need more people, you would either have to lay people off or find new jobs for them.

I often swoop in and knock out tasks in hours that would take the company's infrastructure/SRE teams days or weeks to do, because I've done it a lot and I know what I'm doing. Its also less likely that I'll make a configuration error that exposes itself in prod, simply because I've already made those errors in the past and learned from that mistake. And when I do screw it up (which is a very, very, rare occurrence ;-) ), the company isn't scrambling to fix it. They call up support and we get it fixed ASAP. Again it's not for everyone, but it is for some people. I usually find that buying Red Hat saves a lot of money rather than costing money, which is why so many big companies do buy us.
When I hear explanations like “space is expanding like the surface of a balloon” it’s always confusing. Because a surface is an object, separate from anything on it, but space is the thing we’re all embedded in, so we’re like drawings on the balloon.

If space is expanding why aren’t the radii of fundamental particles and their orbits and molecules also expanding? And if that were the case we couldn’t notice space expanding.
iSH is another good alternative, with alpine Linux and possibility to install packages. Still in beta though
I like how your comment, which I totally agree with, is right below this one when I read it.

> Frankly, it reminds me a lot of XHTML vs HTML5. I buy all the arguments XHTML had, I like the vision it had for the internet. It also wasn't what actual end-users valued, and something that offered that won out because it provided more value, even if it didn't pursue the same vision.
Annoyingly I've always struggled with the precise definition of spin, but to my understanding angular momentum is only conserved if you take spin into account as well. Being quantum mechanical there is some ambiguity in the direction, but in principle it is a vector (except it's a superposition of several vectors, and this superposition is also equal to superpositions of different vectors, I think there is usually one 'pure' vector, but that might just be after measurement).
Upvote for Panic. I’ll always upvote those guys. Prompt is great.
By all means yes, I'd argue spanner would be the ideal candidate for the task. It scales beyond anything else I've come across. Mind you, so do the costs of running it. I've only used it for training exercises and numbers add up like nothing else. IIRC running a production instance at the bare minimum would set you back around 9k/month.
Socialising, not really... It's not as good for socialising than webcamming IMO. I tried some apps like VR chat and altspace but they're too clumsy, and the avatars are too disconnected from the chat taking place. The tech isn't there yet. We need eye tracking, full body tracking and facial expression recognition.

It's great for feeling like being outside of the house (we're in full lockdown in Spain) but that's all.