skysight-inc/HackerNews huggingface dataset:
> slinging general relativity equations

I'm sorry this instantly turned you off.

The only equation in my comment is the Minkowski metric which is the metric for Special Relativity, and should be familiar to everyone who has done any SR at all.

Moreover, it's just a a generalization of the Euclidean metric as follows:

The Euclidean interval for

spatial
dimension equation for Cartesian coordinates in flat space
0 dS^2 = 0
1 dS^2 = dx^2
2 dS^2 = dx^2 + dy^2
3 dS^2 = dx^2 + dy^2 + dz^2

What we do differently in spacetime is add in a term with the opposite sign:

(mostly-plusses, flat spacetime)
spacetime
dimension equation for Cartesian coordinates
2 dS^2 = dx^2 - cdt^2
3 dS^2 = dx^2 + dy^2 - cdt^2
4 dS^2 = dx^2 + dy^2 + dz^2 - cdt^2

Which shouldn't really scare anyone who has done Euclidean geometry.

The interesting difference is this: in Euclidean space, straight paths are shorter than curved paths, but in flat spacetime, it is curved paths that are shorter.

If you prefer wikipedia, https://en.wikipedia.org/wiki/Spacetime#Spacetime_interval which you can edit, or perhaps you can add to the Spacetime page on the simple English wikipedia.
That's where some of us are destined to end up, I'm afraid. :)
Home building is a highly competitive industry with almost no natural barriers to entry

For a wood frame affair in Flatlandia this may be true, but the engineering and project management skills required to deliver a high-rise building in Manhattan on time and without cost overruns are infinitely higher.

We argue that land use restrictions are the natural explanation for this gap.

No shit, Sherlock. Manhattan is full, the Subway runs at capacity, as do the roadways and sewage lines. You just can't put extra people in unless you expand infrastructure.

You'd rather ask why Philly is so cheap when both Boston and NYC are near-unaffordable.
"Just?" That's a fair sum of work. Do you have purpose built VMs just lying around?
What claim?

I think it's pretty obvious that the GPL derives it's power from copyright. Reasoning: If the GPL does not apply, then you don't have any right to anybody else's code (by the Berne Convention), so it gets its power by granting you more rights than you would have had by default. Make sense?
OT Some years back I was given a tour around the McLaren workshop. The work that goes into those machines is impressive to say the least.

I knew a guy on the electrical testing team and he said that they had just spent the better part of 2 weeks tracking down a single misfire from a race. Turned out two tracks on a PCB were slightly too close together.
A few years.
Maybe there needs to be an extra level of compliance for apps that are straight-up. (Like PCI compliance)

Opt-in, but you get a special badge on your App Store listing.
On the receiving end, unbelievably successful and unmitigated disaster look pretty much the same. :)
http://i.imgur.com/E4jeTmM.jpg
I do wish energy were priced per megajoule. But I suppose this is probably a symptom, like miles-per-hour vs meters-per-second, of the non-metrication of time units at the relevant scales. (It takes order of an hour to drive somewhere, and order of an hour to run a laundry machine.) If we had a metric hour of a thousand seconds, a kWh would just be a MJ, no problem. And if we had a "metric year" of a million seconds, a "TWh/yr" would just be a GW. Unfortunately, it's pretty important to humans to track time in a way that lines up with earth's rotation and revolution, and there's no way to make that metric. (If French Revolutionary Time caught on, a second would be 1e-5 days instead of 1/86400 and an hour would be 1/10 of a day, and that would be a start, but the year/day ratio is pretty intractable.)
Not if you're Venezuelan.
I would. But that's only because it's what I've used at work for 2 years and I'm very confident with it now
The way you're using consciousness conflates the human mind (which I would argue fits your definition of "what it feels like to have a cortex") and the property of experiencing existence.

Animals might have a very different mind, but I'm quite certain they experience their existence.
There aren't a lot of enterprises where humans deal with uncertainty in any significant way that you can't level that Taleb quote at, which is one of the things that makes Taleb quotes so frustrating. It's the "give liberty for safety deserve neither" of stochastic processes.
Math geek t-shirt you have to solve equation for to understand
Almost any 'wet lab' research neuroscientist will tell you that we know more about what the rats and mice are thinking than any other animal, including their spouse ;)
That sounds like the opposite of a Ponzi scheme. You're saying it becomes more sustainable as more people participate.
It boils down to what is I think it's one of McLaren's major roadblocks right now - lack of integration with the engine supplier.

Alonso (or others in the team) had likely run Pouhon flat in a simulator. He, and his engineers, knew it was within the realm of possibility for the car. But, to what level of detail do McLaren's simulations model the energy system? Do they run real ECU code/parameters? Probably not.
I wish I could!
> ...the person is less likely to report - which is why these laws exist.

It doesn't work like that in the real world. These laws only nab the lower-rung staff in the unfortunate position of unavoidably leaving tracks while implementing the directives from higher management. Directives are given in abstracted form, and clarifications are passed out in untraceable means, typically verbal conversations, and even then the clarification is very rarely spelled out in black and white, and more often expressed as a gruff "do whatever it takes" command.

A soft, low-level form of how this plays out in the US that many can relate to: salaried employees officially are supposed to only work 40 hours a week. It is commonplace for many organizations to abuse that, but nowhere in official, litigable forms will you ever see a manager telling an employee they must work more than 40 hours.

Finally, above a certain level, employees who try to play CYA games with emails and/or written letters will find themselves frozen out by management. It isn't like this everywhere, but it is common enough that I see it happen in some of my client accounts where I consult at; fortunately, I'm not the adversely-affected party, but I feel for the many permanent staff who I see subjected to this anti-pattern.

If you really want to put a dent in this, then lobbying for allowing single-party recording to bring evidence of malfeasance to law enforcement might be a start.
Why would you want to play any role-playing game "as written"? Make it your own.
I wonder why inflight refueling hasn't taken off in the civilian market. Risk, cost, other reasons?
It's obviously the other extreme of this spectrum from Oliver's waste bit last week, but that doesn't make it useless. And yes, a lot of it addresses concerns with arguments Oliver didn't make.

On the other hand, the point about the volume of waste coal generates is probably well taken (though I'm guessing the numbers are hyperbolized, extrapolating from plants with outmoded scrubbing tech).
Why does consciousness have to emerge? Why can't it be intrinsic?
Ultimately what he says remains true: private companies aren't compelled to let somebody use their services. This makes it all the more important, in my opinion, not necessarily to keep trying to reform or care about how private companies handle various things, but rather for public institutions (those under public control, roughly speaking), to continue to provide a public, non-internet way to engage with those institutions. For example, a lot of local governments now, you get the sense they won't pay attention to you unless you go (or threaten to go) on Twitter. So at that point having a Twitter account is a prerequisite for democracy a little bit. I mean Twitter's fine and all, but what if you run afoul of their terms of service somehow, or what if they simply invoke their right to refuse service to anyone? Neither of those has anything to do with your rights as a citizen, and shouldn't affect them.
Missing Server Found (2001)
A data science investigation of IMDB, Rotten Tomatoes, Metacritic and Fandango
Next week in the headlines:

"Bitcoin causes global warming"
That's an arbitrary price though.
Instead of 10¢ per KWh, we could price it as 36¢ per megajoule.

It's the same thing.
You're basically wrong on every single point. It's a syntactic hack in JS to get a guaranteed boolean coersion, but for anything else it's an absolutely pointless abomination. (Maybe PHP has a similar thing, but I haven't programmed in PHP, so I wouldn't know.)
To be fair, the turbochargers in contemporary F1 cars are not powered only by exhaust gases. To get rid of the infamous turbo lag, they are electrically assisted. Still not a super charger of course, but the "assisted" part makes them a bit more similar.
Coding with an audience under time pressure is a frap way to assess people.
You can always run Emacs with Common Lisp. ;)
Why not support TLS/amqps at all pricing levels? That's a huge turn off for me especially since you only have it at your highest pricing level. I'd also make that clear on your comparison page as it seems like you support amqps at the $55 level but do not on your pricing page. Good luck! (seriously, no sarcasm)
People have bred dogs for all sorts of characteristics. But nobody has tried breeding them for intelligence. There a few individual dogs that have vocabularies of hundreds of words. What could be achieved if people selected for that?

Uplift?
Anyone that eats at a place based on the decor or the other clients is missing out on a lot of good living. This goes up and down, for Waffle House and the Savile'. Generally, if people decide to eat at a place based on what they think others will think of them, then I think you know what to think of them.
Cruelty depends on knowing what is moral and choosing to do something immoral. In this case, humans are cruel for knowing animals are sentient yet still subjecting them to horrible conditions and painful lives just to satisfy our pallette. The lion is not cruel for eating the zebra because it is necessary for its survival.
You're thinking of kernel-mode drivers.

What I've linked to is a driver. Everybody calls it that.

When you go download a driver for graphics cards, whether on Linux or Windows, that driver actually consists of multiple components, some of them running in kernel-mode and some of them running in user-mode. It's basically the exo-kernel principle, but without feeling the need of giving it a fancy name :)

There's a broader history of user-mode drivers not just for graphics, and not just in the obvious case of micro-kernels. User-mode USB drivers used to be a thing, for example (and I guess they still are for some more obscure hardware).
Apple got ahead of itself with the touchbar and it's no surprise they have not pushed on it much since release. I sincerely hope they are mature enough to recognize it was not the right tech and pull it from future laptops.
> Bitcoin is closer to a commodity in the sense that it is finite

Bitcoin could be forked in the future to become inflationary. It has no permanent rules, things can change through consensus.

It isn't like gold (gold can be devalued through poeple losing faith in it, etc., but the supply of it doesn't inflate other than through discovery/mining).
Or just buy two DC-10s and refuel in flight. We do it literally everyday in the Air Force.
For those in SF, in the past I tried finding the longest possible flight from SFO using an "opposite side of the world" website. It landed in the ocean, in the vicinity of Madagascar.
>This is the sport which outlaws ABS because the driver is supposed to do the work, not the car.

That's been a silly distinction to bring up ever since the introduction of automated gearboxes and the end of clutch management.
If I get the GP correctly (IANAP and everything), he is pointing that General Relativity works equally well with many different descriptions of space-time.

The one where everything always move at c, and only the direction of movement changes is one among many possible (and indistinguishable) descriptions, and not a very useful one.
When you code something, choose the most strict browser/compiler you can. Then you get it right the first time and don't have to see it break so much later when tested elsewhere.
> Even in 4.5 there's many functions that have no direct state version yet

Which ones are you missing in particular?
Totally agreed. A single Rabbit node is brain-dead easy to run - the hardest part is getting the right Erlang packages installed. HA Rabbit is a problem I'd be willing to pay someone else to solve for me.
No refills for safety reasons.
So delete your contacts, and keep them in something else such as a simple document.
If the block had zero transactions in it, it still would have cost just as much energy to create.

Similarly, if the price of the coin were 1/1000th but the block were full, it would have cost 1/1000th the price to confirm those transactions.

What determines the cost/mining reward of a block is not the transactions in it, but the value of the chain as a whole.
Such meat you mention toward the end makes up such a small fraction of a percent of all meat production that its almost not worth considering. Not to mention that such meat production is not scalable and would never be able to satisfy the current western pallette for meat.
What is the benefit of having an OCaml implementation of git, besides that it's written in OCaml?

Edit: I get it now: it's an OCaml library that allows you to interact with git repositories and provides many (most?) operations.
What about tup? http://gittup.org/tup/
That is the entire point of the major version. The fact is, developers sometimes make breaking changes (sometimes for good reasons, sometimes for bad), and we want a standard way of documenting that. If you don't make breaking changes, than stay on 1.X.Y forever. If your project is only a year old and already on version 10.0.0, you are probably doing something wrong; but at least documenting it in your version numbers.
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Its very expensive and very risky for civilian flights. Either of those factors alone would be a no-go zone for airlines, put them together and its worse.
Well, these days when I see nuclear power discussed in the popular press, it's usually talking about how it's extremely expensive and also almost caused Toshiba's bankruptcy. Probably not what you had in mind.
Really? Why is it not the right tech?

I got the version without, but is it universally bad..?
One must ask whether there are health concerns when hundreds of people sit in economy for 20+ hours. Is saving four or five hours really worth the risk of catching something?
Indeed. In my opinion RabbitMQ is essentially useless in clustered mode.

When Rabbit recovers from a network partition and has to decide between multiple potential master versions of a queue, it picks the largest one to become the new master, and discards the others. It's rather mind-boggling that it can't merge them instead; after all, if your application is capable of handling duplicate deliveries, then merging (which would potentially result in previously ACKed messages becoming visible again) would be a perfectly acceptable solution.

The only way to make it non-lossy is to turn off HA recovery and manually handle network partitions, but it turns out that's not practically feasible, because there are no tools to work with Rabbit queues at a low level; the only way to recover is to discard one or more nodes.

We've also found Rabbit's clustering to be very flaky in general, beside the lack of partition tolerance. We recently had a Rabbit crash where one Rabbit node (not the machine itself) went down, and things got really stuck; the only way to recover was to stop all the nodes, then start them again. After we did that, all the queues were empty. We've also had instances where suddenly bindings go missing, or the bindings are there but attempting to declare them from a client fails with an "bindings already exist" error. And many other weird errors.

The last year or so, after having to endure all of these issues, we've decided to ditch clustering altogether and run a single node. That's risky, but ironically it's a lot more stable than our previous three-node cluster.

In my opinion, Pivotal really needs to redesign RabbitMQ's clustering.

Has anyone successfully moved off Rabbit? ActiveMQ, NSQ? Disque [1] looked promising, but seems dead (last commit was 18 months ago) at this point.

[1] https://github.com/antirez/disque
Ask HN: How do you scope software projects and gather requirements?
Howdy HN,

I run a small software consultancy and am interested how others scope software projects, what (if any) tools you use to collect requirements (and keep them updated), and I guess the "flow" of these requirements through the lifetime of the project.

Personally I have always been pretty ad-hoc with this, using a markdown file to collect initial client requirements, Google sheets to break it into line items (for estimating), a Google doc for the proposal, and finally creating User Stories in JIRA (assuming the proposal was successful!).

I would be interested how other people manage this, and if there is a better way. Thanks a bunch.
Also "set up" is the verb form, and "setup" is the noun form. Similar:

Log in with your password, and login will be complete.

The signout process causes the user to sign out.

I will pick up some rocks with my pickup truck because someone asked for a rock pickup.
> pull it from future laptops.

I expect the opposite. They will continue to iterate and fix the issues with the touchbar which many users already like and appreciate. The obvious change to make is the addition of haptic feedback.
Well, a couple of the people whom "The Steves" (inside joke: for a while it seemed like everybody who was committing code to Icarus Verilog was named Steve--I think there were 5 at one point) used to work with were on the Verilog committee itself. Both Cadence and Synopsys used to fail the validation suite that Icarus used to run.

And I, personally, was the person who reduced our Cadence Verilog licenses by 25% once I got Icarus Verilog up and running. At the time, the EDA vendors were dragging their feet on Linux versions because you had to buy significantly more licenses if you were stuck running it on Sun equipment.

Obviously, my info is highly dated. I haven't tracked Icarus Verilog in quite a while, but code doesn't magically get worse as long as it is being actively maintained. And the original writer/maintainer (Steven Williams) is a solid developer and is still on board.
A big problem with it is that, as a new interface only supported on the high-end new MacBook Pro, you still have to design your apps to work perfectly without it, lest you exclude users of the old MacBook Pro, users of the non-Touch Bar MacBook Pro, MacBook users, MacBook Air users, Mac mini users, iMac users, and iMac Pro users.
PSA: You might have $204 worth of cryptocurrency (Ripple) you forgot about
SML/CML might interest you.

http://cml.cs.uchicago.edu/ -- the CML idea

Three SML implementations with CML support

http://www.polyml.org/

http://www.mlton.org/

http://www.smlnj.org/
I hope not: it’s the single most used new tech on my mbp. It’s useful, better than the useless row of keys that was there before (ok, if you’re using old IDEs they may still be useful), and adds functionality
Ah, that makes some sense.
Why compare one macronutrient like protein? That seems like a way to spin the data to reach the authors prejudices. A better metric would be calories, because that's a better indicator of how much is needed to feed a person. Also it's a little unfair to equate a mouse killed in the field to a cow tortured since birth and then slaughtered and possibly skinned and gutted alive.
Working on Vue would take similar effort, deleting tons of the code and rewriting it.

Part of it is that this is project started as a way for me to learn what goes on under the hood of libraries like React and Vue. While I made this, I wrote a compiler (lex + parse + generate), virtual DOM engine, reactivity system, and more!

I've started to take Moon in a different direction than Vue, and in the future it will most likely be even more different than Vue.
If people of the future consider eating meat to be barbaric, I think it will more likely be a response to the fact that meat consumption is not scalable. Think of it like Aesop's fable about the fox and the (presumably sour) grapes.

In truth, if we offer animals a good life and harvest them in a compassionate manner, the ethical arguments against eating meat are weak.

People also underestimate the capacity for plants to feel. Plants in conventional monoculture farms are much more susceptible to pets and disease. Disease susceptibility is a fairly universal response to sustained stress in animals, so it seems reasonable to me that the conditions we are keeping plants in cause them distress as well. Just because plants "think" on long time-scales using gene regulation (plant biochemistry is incredibly complex) rather than short term activation of neurons doesn't mean their experience is any less salient.
The default in copyright is that you have no rights to a copyrightable work. The GPL grants you some right under certain conditions. If the conditions fail to be met, your granted rights are revoked.
As the creators of the GPL license the FSFs widely published opinion is likely to matter to judges evaluating a case. But in the end noone knows outcomes until would come to pass. So seek to minimize legal risks.
Huh? I though the whole initial problems was that the hybrids outperformed the petrol versions quite handily.

Why would you have to limit gasoline when the system is going to evolve to wipe that out anyway?
Interesting how in US I always see articles talking about how to find happiness. Ever since I moved to Japan I haven't heard this theme yet. I am made to wonder if consumption based societies have a bigger issue with being unhappy than those that strive for conservative lives. One one hand the author has a point. I can think back to activities where I was happiest that involved being consumed wholly by that activity. On the other hand, there are moments where I think I'd be better off if I didn't focus so much on that one thing. I'm not sure where I'm going with this other than I'm tired of these articles that seek to define ways to be happy. This really says something about our society or perhaps about the nation. Is there a happiness crisis? I don't see it happening here in Japan but perhaps I'm disallusioned as I have not fully integrated into this society.
Parsing JavaScript in JavaScript
> The sport aims to be an R&D center for road going technology.

This continues to surprise me. Is that really what is attractive to the audience?
It is that question that does not have much meaning.

If you observe one of a pair of entangled particles, you will see one of its possible values. Entanglement only means anything when you compare it's value with its pair's value, and that comparison is limited to the speed of light.

So, yes, in a sense quantum entanglement is free of all the causality issues brought by GR. But it does not really exist until the pair can communicate.
For business, you are flying to make money. A missed connection due to a slight delay could turn it into a 24 hour delay, and therefore a missed opportunity to make money.

Of course, I don't know if the stop overs for refuelling involve a connecting flight or if you are put back on the same plane, so in those cases (where your are guaranteed a rest stop of no more than 3 hours) I can see the preference going ether way.
There are a number of reasons, but limiting the amount of fuel provides a certain amount of safety in a crash. It also prevents an arms race for ever increasing horsepower amongst builders. You can't just increase power delivery forever if you don't have the fuel to finish the race.