skysight-inc/HackerNews huggingface dataset:
Being scary doesn't necessarily mean dangerous. Perhaps the steep cliffs actually keep people paying better attention than a narrow road with parked cars or trees along the side which may feel more comfortable but might be equally dangerous. There's the phenomenon that people drive faster on wider lanes regardless of the speed limit.
A sensory illusion that makes yeast cells self-destruct
> as noticed that pre-digital artwork is often vastly lacking in terms of resolution

Non-digital artwork has infinite resolution (well, down to the Planck length, I suppose). The texture of the painting surface and of the brushstroke is relevant in the creation of art. In fact, you are demonstrating exactly what the previous poster said: impressionism consciously chose to omit the finer details that other schools included as a stylistic decision, but that lower level of detail in the depiction does not imply a lower level of fidelity unless your only definition of fidelity is accurate depiction of an object.
Some HN readers might be interested to know that Maxwell's equations can be written in a single expression (with one auxiliary condition).

The first step is to define the Faraday tensor F, which can be written as a 4x4 antisymmetric matrix. Such a matrix has 16 elements, but the diagonal is all zeroes (by antisymmetry: x = -x => x = 0), and the 6 off-diagonal elements on one side of the diagonal are simply the negatives of their mirrored values. This leaves 16 - 4 - 6 = 6 independent elements—exactly enough to contain the 6 elements of the electric and magnetic field vectors (3 each for E and B), which in fact are exactly the elements of the Faraday tensor.

In terms of F, the Maxwell equations for the divergence of B and the curl of E can be combined in the single equation

dF = 0

where d is the exterior derivative. As with ordinary potential theory, where a vector field with zero curl can be written as the gradient of a scalar function, a tensor whose exterior derivative is zero can be derived from another tensor, called in this case the 4-potential A (which contains both the ordinary electric potential and the magnetic vector potential):

F = dA (1)

(This is the auxiliary condition alluded to above.) The second expression for F, corresponding to the divergence of E and the curl of B, combines the exterior derivative and the Hodge star operator ⭑ [1]:

d⭑F = J (2)

where J is the 4-current density (which contains both the charge density and the 3-dimensional current density) [2]. Substituting (1) for F in (2) then yields Maxwell's equations in a single expression:

d⭑dA = J Maxwell's equation(s)

This equation is perhaps a more compact and elegant choice for those T-shirts: "God said: d⭑dA = J—and there was light!"

[1]: The ⭑ character may not display in some browsers. In this case, you can use an asterisk instead.

[2]: Eq. (2) is written in "God's units", equivalent to SI with μ₀ = ε₀ = 1 => c = 1.
Even if energy can be saved... why not make the companies set different office hours at different times of the year, rather than make people reset their watches? If companies' office hours are not to be messed with, why are the people's lives?

I really cannot understand the logic behind this. People should be free to choose if they want to sleep more when the sun is down, right? And with Capitalism, you should tune the price of energy consumption to make people save more, instead of making strange laws.
I find the idea that drones with cameras are somehow a new surveillance risk for "bad guys" a) prevalent, and b) bemusing. Probably 40% of the population is currently carrying round an 8 or 12 (or more) megapixel camera all the time. Nobody would bat an eyelid if you stood across the street from a bank for 40mins with a iPhone pressed against your ear with the camera facing the bank, or if you left a phone in a windscreen mount in a parking lot facing a prison. Why would people wanting that bother learning how to use a drone?

For less than the price of a typical no-skill-required drone, you can go buy one of these:

https://www.youtube.com/watch?v=Csp6asxf00o (search for "Nikon P900" for many many more examples)

I'm not even sure any of my drones would be capable of getting out to take the shots in the first 15-20 seconds of that video, then making it all the way back to where the camera is. And those people have infinitely less chance of noticing they're potentially being photographed than if I'm flying a drone close enough to take those same shots. (And no, drone stabilisation - even with high grade brushless camera gimbals - isn't _anything_ like steady enough to use in conjunction with optics like that. Raytheon and General Dynamics can probably get useable imgaery from 2000mm equivalent lenses on military grade drones, but it's _way_ outside hobbyist or even small commercial photography grade gear)

What makes a camera on a drone scary, but a $700 point-n-shoot not worth worrying about?
Ask HN: Do you employ or have worked with a growth hacker?
My startup is in the crowdfunding phase and we're looking at hiring a freelance growth hacker. If the role is a good fit, perhaps we'll make it a permanent one. My question is; do you employ a growth hacker or have done in the past? Did it work for your product or service?
Yes as soon as you have to support both 32 and 64 builds in a multi-threaded program that is using the C run time library. This of course is just my opinion :)
Soviet Spy Ronald W. Pelton to Be Released from Prison
Manipulate MS SQL Database Using SQLAlchemy
Harir – Reducing Noise in Arabic Script
ASP.NET MVC Do's and Dont's or Best Practices
The brides
But "function" only exists for something that was created by intellectual being with a goal in mind. How can you define "function" for something that evolved naturally?
Power meters that record the time when energy is used rather than the "dumb" ones that just record total usage are still relatively new.
The seeds of planned dissatisfaction are planted early. It goes from best interests...

> Writers spend time researching stories and write on captivating topics. And editors and producers spend time preparing and shaping stories for their overall audience.

... to making sure the reader is distracted from content as much and as often as possible:

> Billable impressions require a rendered ad to be have at least 50% of the creative in-view to the user for at least 1 second.

No wonder clickbait flourishes. If the entire "content" (and I use the word here with derision) of the article can be digested instantly, larger fraction of time between page loads can be used to flood the viewer with ads.

I wish there was a proper way to boycott advertisers. Not just to block all the radioactive waste[+], but clearly state back that "due to your actions, I have made a conscious decision to avoid you and your products".

+: I picked the term from TeMPOraL's post. It's a good one.
Every third telecom around the world uses apache to load balance requests for specific application.

Source: I have to support that SW stack.
I find it bizarre that you classify the art of film by the action genre.
> Being on year round DST would save us the most energy

And if we redenominated the dollar, people could be several times richer than they are now!
I don't really care about practical implications of such discussion. On the contrary, these definitions seem to be an interesting philosophical topic.
Security for fracking: a new opportunity for solution providers
Gosh, yes, thanks for the advice. I'm looking forward to reading my second book. I'm hoping it's about why Spanish people are really good at making shoes.
I'm really glad I didn't wait to purchase my 600Hz plasma screen. Got it for an incredible deal and the image quality and color reproduction (dark scenes especially) are off the charts. These days other screens just can't compare and, as the article mentions, nobody makes plasma any more.
The Unix community tried making one desktop environment better. It was called Motif, which mutated into CDE. Pushing monocultures leads to bland and a lack of creation, because you end up pissing off end users, like what happens when MS changes the start menu functionality, for example.

One kernel is even worse. OS research is still very young, and different types of operations need very different sorts of kernels. For an example based on the original article, getting information from /proc requires three system calls. You have to open the pseudo-file, and in the process allocate memory for a file descriptor, you have to make another system call to get the information, and then a third to close the file after you're done. That's six jumps in and out of kernel space just for one operation. For some tasks, especially when you're starting to get into hard realtime systems, that can lead to unacceptable amounts of delay. After all, would you be satisfied if the one kernel people settled around was the windows kernel?
Always hate it, why? It kills people.
If you need to send more types of messages, there are other IPC mechanisms.
Quantum computing: How Australia can capitalise on its global lead
Top right of the screen. When you are editing a post of course.

https://storage.googleapis.com/sunsed.com/images/tutorials/p...

Thanks for trying SunSed my friend!
Speaking of bringing nice languages to the browser. Kotlin is a simpler language than Scala and also compiles to JS. Unlike Scala.JS which seems to be a completely third party project, Kotlin's compilation to JS is considered one of the primary features of the language.

Kotlin is barely at 1.0 at the moment though.
Language is a tool to be used effectively. The implications of a particular choice of words (or the capitalizations thereof) might make people uncomfortable. But conciseness is a virtue of its own.
Haven't used it for a commercial project, only toying around at night. But the company I work for does use another of Telerik's products, Kendo UI.
It is mentioned in the article that GCHQ has a tool for changing the results of online polls.
Perhaps it's entirely appropriate that the two most famous Belgians (in the English speaking world) are fictitious: Tintin and Hercule Poirot.
Well, he still uses a computer to run his TeX program to write TAOCP, so I wouldn't exclude that he would build a computer. Also, it's not that complicated to build an electromechanical computer.

As I see it, the hardest part is making the magnets to generate electricity from a water mill. Then you only need some copper and to make a lot of wire out of it, and you can make electro magnets for the gates. (It seems to me to be even easier to build than Babbage's mechanical computers).
Well cowboy is an application library. So it is a bit in a different league. With cowboy you can start writing your business logic or application code directly and go to work. Nginx can do some of that with Lua integration but it is nice for serving static files and proxying to back-ends.

I could see for example nginx in front of cowboy. It would strip away ssl, serve static pages, maybe authorization/authentication and then proxy connections to cowboy servers in the backend for application logic.
>If companies' office hours are not to be messed with, why are the people's lives?

Daylight savings isn't messing with anyone's life, it's changing the arbitrary read-out on a human-invented device, nothing more.

>People should be free to choose if they want to sleep more when the sun is down, right?

Of course, anyone can sleep as much or as little as they please. There might be school and employment consequences to that, but you can still do it.

You can also drive a car as fast as you please - but there might also be consequences to that.
What I learned with Rdio without using Rdio
DO Not USE SPECIAL CHARACTERS as They Are Interpreted by SQL
I have been known to call that language "Coctothorpe" when in a biting mood.
You're right that he should have (and Strava could probably provide some baseline information on that) to make it conclusive, but I'm confident that the conclusions reached are valid - it's a very popular route and that's an obvious conclusion to a Melbournian cyclist.

You can see it on this Strava heatmap, running from St Andrews to Kinglake - http://labs.strava.com/heatmap/#11/145.29434/-37.55368/blue/....
High performance proxy for MySQL powered by Go
Debut of “Work Chat”: Work Chat App for Facebook at Work
That's a good point. I might phrase it thusly: in order to build up expertise within a solution space (such as doing cool mobile device applications) you end up having to stick with a particular platform/tool-set long enough so that your knowledge of the platform isn't a barrier to solving complex problems.

It sounds to me like you more or less ended up doing the correct thing.
Hehe, I've been using different European-based dedicated server providers (including Hetzner, but also server4you, OVH, Strato) for 10-15 years as well, with varying numbers of servers. All of this happened during the cloud revolution, and I've always been wondering "why would anybody pay these outrageous AWS prices?" - after all, the much-hyped scalability quickly becomes much less relevant if you can practically get 5x-10x the power and traffic in the form of dedicated servers at the same cost, plus the capability of quickly ordering a few more servers (which are automatically allocated to you from a pool of ready-to-use servers, this has been standard practice at dedicated hosting providers for quite some time now) and have them installed in a matter of minutes (provided you've automated your setup process). Sure, you'll have a harder time to get rid of the additional servers, since rentals are typically on a monthly basis, but - did I mention that you'll start with 5x-10x the power anyway, which greatly reduces the need for quick up/downscaling?

Aside from huge customers like Dropbox, which most likely get deep discounts on AWS, I don't see who else could get a better deal out of AWS (or any similar cloud provider) than they would get by directly renting dedicated servers, even considering the much-hyped scalability factor (which most customers probably don't ever end up needing anyway, because...let's face it, there's just so much attention going around on the net, which means there can be just a very limited number of things that "go viral", while there are many, many more services competing for said attention out there). That's at least true for the European market. AFAIK, the US hosting market is a bit different and generally more expensive, so AWS might have a better price point with regard to the competition there.
If it's supposed to be pronounced "engine X" they probably could have named it "engineX". That's what you get for trying to be cool.
The Elements of Drawing: John Ruskin’s Teaching Collection at Oxford [video]
Holiday homes rentals in Dubai
Quora Down
Note: I'm pretty sure the glass alone in the lens of that camera weighs more than all but my biggest drone (my second-heaviest drone is 470g ready to fly).

I usually fly with a 38g camera if I'm trying to record decent pictures (a Mobius) or a 17g camera if I just want a useable recording of a flight (an 808 keychain camera).
Now it is Up.
Azure down. Production servers hosted on Azure return 502 errors
I took it as discovering an unexpected, seemingly uncharacteristic quality of something important.

A baby that sees elders consistently and intently look at paper, fold it carefully, put it in important places, then all of a sudden sees one purposefully break it would give a jolt.

Either way, I love that video and have wondered what else might give a baby a similar experience.
For a more in-depth look at Signals, there's Michael Kerrisk's Linux Man Pages on Signals [1]. AFAIK, the best reference on Signals is in the book by Stevens and Rago [2].

[1] http://man7.org/linux/man-pages/man7/signal.7.html
[2] Advanced Programming in the Unix Environment, Second Edition
Rep. Lamar Smith Continues His Harassment of Scientists
Google patches the snot out of the Linux kernel in Android. In fact in now contains a fair amount of ideas from OpenBSD. Theo De Raadt talks about some of the in his Pledge talk: https://www.youtube.com/watch?v=F_7S1eqKsFk
I live near Melbourne and if there wasn't DST, in mid-summer the sun would rise at 4:30am. Pass.
Only the experienced ones. Your echo-chamber will soon kick in to continue your Dawkins bashing, no worries.
there is these days _by_lua_block.
If you have to hire an extra person to manage the new hardware, then you aren't saving money.
Yes, 'undecidable' is used for a similar class of mathematical problems. For example, the continuum hypothesis - another question about an equality of sets - is undecidable in ZFC. This notion is strongly related to undecidability on Turing machines (possibly equivalent, depending on how you look at it).
Minneapolis Police Say Several Shot Near Protest Scene
Google Starwars
Because his team returned with the spacecraft and spent more than 500 additional days in space to pick him up.
It's fixed now. Apologies.
> One kernel is even worse. OS research is still very young, and different types of operations need very different sorts of kernels. For an example based on the original article, getting information from /proc requires three system calls. You have to open the pseudo-file, and in the process allocate memory for a file descriptor, you have to make another system call to get the information, and then a third to close the file after you're done. That's six jumps in and out of kernel space just for one operation.

As it turns out, I'm working on a solution for that exact problem, within the Linux kernel. I don't see any particular obstacles to doing so.

As far as I know, Linux and BSD don't drastically differ from an "OS research" perspective. People doing OS kernel research that needs a "very different sort of kernel" tend to build a custom kernel, or run on L4 or similar. And sometimes that research makes its way into production kernels.

> After all, would you be satisfied if the one kernel people settled around was the windows kernel?

No, because it isn't Free Software, and nobody outside of Microsoft can change it.
I've been walking past a mysterious bunch of tanks and pipes in the middle of a parking lot in Sunnyvale for the past year. It often smells terrible. I just realized that it's almost certainly a Superfund water treatment site. I'll probably give it a wider berth from now on...
Somali Law
Keys to a successful Google team
What's common is both are based on kqueue/epoll. Erlang then provides a very elegant interface on top of it.
How news organizations are using Slack
There is easy money to be had if someone will show that net global warming (more than would be reasonably expected by random natural variation) is supported by observational evidence: they can win $100,000.

http://www.informath.org/Contest1000.htm

Aside from being able to pay off some of the mortgage (if you have one) or enjoy the holiday of a lifetime, isn't this a terrific opportunity to finally wipe the floor with the 'deniers' once and for all?
Thanks for your perspective on this.

|"Why would people wanting that bother learning how to use a drone?"

Good point. I suppose they might still gain some value from having the aerial view as opposed to setting up multiple shots from cameras/phones on the ground? Then again if, as you say, the shots from a small commercial aerial drone are not clear because of stability issues etc., then it is pointless to use one. Is drone camera stabilization getting better though, to the point where it would be very easy to capture a good, high quality image from a higher altitude even with a small drone in the near future and is that something regulators should take into consideration now?
How do you think the drone industry should be regulated and what weight class(es) do you think it these regulations should cover?
The Myth of the Rule of Law (1995)
Yep. I'm real glad Hestenes has been championing VA/VC so hard. That first text is a perfect supplementary reading that any undergraduate should read. Who was the author?

I skipped the a few and went straight to the last PDF (the Survey) and coming from a stronger foundational math background, I felt right at home. (I'd imagine those who went down the physics route would be thrown off by the notation though, so I understand the author's preface). He mentions physics and CS applications, but I really think this has structural engineering applications as well -- e.g. R^4 seems like a perfect domain to explore bidirectional tensile and shear strength of materials (especially composite materials/aggregates), then perform some FEA with all of the simple operations within that come inherent to operating within the bounds of the 4-vector form. I mean that's a real trivial example (and I obviously don't know enough about structural engineering to make a good analogy) but it seems like one of those cases where you move the problem set lifted into another domain, perform your manipulation then finally lower back into your original (co-)domain. (Frequently done in algebraic topology, most famously by Perelman on Poincare)
As a teenage Muslim atheist, Dawkins was my hero. As an adult, 20 years later, I am embarrassed for him and for you, his followers.
Thanks for sharing Bigiain. Interesting discussion. Have wanted to get into drone photography. Am a painter, so think this would be an interesting new domain for me (provided that I can find a canvas large enough!)
As someone who lives in India (no DST) but interacts frequently with people in the USA. I hate it. Maybe it was rational before mass globalization, but now that many of us interact regularly across time zones and national borders it complicates time, which should be sacrosanct.
Ahmed Mohamed seeking $15M in damages
This looks pretty neat. I personally hate working with JavaScript directly.
I found some things about it to be frustrating and buggy, but it was still less work than writing two different apps. My code was about 90% shared between devices.
100 basis point is 1% (why they don't just call it 1% I don't know, that'd be more readable for 9900 BP of readers...)

Now, 100 BP is what, 10x larger than the long-awaited "first rate hike in a decade"? Why do they even discuss such a "drastic" rate change? It'd take years for the interest rate to climb that much at the speed they say they intend to raise it and then it would no longer be a "shock increase" of the sort they discuss.
This is a cyber war. Your white hat won't save you
How do you handle massive traffic spikes? Hetzner seems fine for small project / personal / small company websites with predictable load and people who have no problem spending time setting up all of their services they need themselves, it really just sounds like you just aren't the customer AWS wants to attract.
https://news.ycombinator.com/item?id=10618717
This explanation is wrong. The effect is very visible also in Europe where tv is 25 fps and no 3:2 pull down is performed to 24fps material.

The soap opera look came from the video camera which operated similar way as video playback. Although the systems run 25 or 30fps they show each frame in two interlaced fields. This meant screen was updated 50 or 60 times per second, but showing either the odd or even lines of the frame at once.

Video was recorded in similar fashion so each field was captured with half a frame offset in time to give it effective frame rate of 50 or 60fps even though this meant actual frames would look funny on noninterlaced displays.

Film was transferred to video by taking both fields from one frame or with 3:2 pull down in 60hz countries. This made the effective frame rate closer to 24 fps like it was intended to be shown in cinemas.

[1] https://en.wikipedia.org/wiki/Interlaced_video

edit: added link
Really like the concept. Hopefully you can work out the issues raised by others, can't wait to see where this goes. Consider your current costs covered.
In a world that wasn't fucking awful, Dawkins would be Ahmed's idol, instead of his creepy public persecutor. I guess that's what happens when you spend a few decades on a pedestal, drinking your own kool-aid.