skysight-inc/HackerNews huggingface dataset:
I've found that, at least for me personally, quantum mechanics is much less strange when you ignore the sensationalistic, new-age mysticism quips and focuses on the actual math itself. Let me give some examples:

"A particle travels through all possible paths at once and only chooses one when you look at it".

No, a particle's wavefunction is a vector in an abstract Hilbert space that can be expressed as a linear combination of basis state vectors (|Ψ> = Σ α_i|Φ_i>), and it collapses (decohers) upon measurement to one of them with probability |α_i|^2 when those basis vectors correspond to the observable's eigenstates.

Or, if that's too complicated: a wavefunction of a particle is just a function that can be represented as the weighted sum of other functions, each representing a different path that the particle can traverse. When you measure the particle, the result corresponds to only one of those functions.

Perhaps the first explanation requires you to Google a little bit or pick up a math textbook if you're not familiar with some of the terms, and perhaps the second explanation isn't quite accurate enough, but goodness, they both make a heck of a lot more sense to me than some kind of magical "everything at once" phrase!

Another phrase, this one from the article: "The rules of quantum mechanics allow — actually, require — energy (and, by E=mc2, mass) to appear 'out of nowhere,' from nothing."

No they don't. HΨ = EΨ is the time-independent Schrödinger equation. E is a constant -- a real number. It doesn't change. Furthermore, the article goes on to mention the energy-time uncertainty principle, and a lot of other articles mention that energy can be "borrowed" to create virtual particles out of nothing. This also isn't true, for two reasons. Firstly, there is no energy-time uncertainty principle, because time isn't an operator. You can derive a relationship between the two, but it's not the same kind as the Heisenberg uncertainty principle. And secondly, virtual particles are a mathematical artifact of a technique called perturbation theory (a technique used in many fields, not just QM). Perturbation theory is just one means of solving an equation, and if you try to solve the equation with a different technique, you have no need for virtual particles.

I'm really glad that so many articles on quantum physics are "popping into existence". It's a cool subject. But I'm worried that these inaccurate little catchphrases I hear all the time are causing more headaches, confusion, and sensationalism than quantum mechanics already causes by itself alone.

(There are articles written by actual physicists and quantum information scientists that clarify physics concepts to non-scientists in an easily understandable, yet also accurate way. Scott Aaronson and Matt Strassler are two that come to mind.)
Ask HN: Should a CTO be expected to be the last out of the office?
I recently took a position as CTO at a seed stage startup. Having been in an administrative position before where I had worked 50-60+ hours a week for years, I've ascribed heavily to the philosophy of working smarter not harder. Ideals like "Work life balance", and "agile principles about sustainable development". I recently had a discussion with one of my peers at work and he remarked that he has never been at a company where the CTO was in the office less than the average engineer. He also felt that its nearly impossible to wear a manager hat and a maker hat at the same time in under 40 hours a week, quoting Paul Graham's maker/manager schedule. He mentioned people at AirBnB and Square, Steve Jobs and Mark Zuckerburg were all those who worked many long hours.

I feel extremely divided about this. I worked around 40 hours a week and feel like I'm taking away from my personal life and might even be nearing burnout at half the duration this particular peer is working. Measuring productivity on duration is silly to me, and I'd rather ascribe to the model of work where what counts most is prioritization and output. I realize there are major deadlines 2-3 times a year which may require sudden bursts of focus and attention, but that's why I would push back and reduce the time I work weekly the rest of the year.

What is the appropriate level of work/life balance expectation for a CTO for different stage startups (pre-seed, series-a, series-b, post-acquisition) and how does that differ from the expectations on the people that a CTO might manage?

Is my position on work-life balance tenable? Are there examples of successful startup founders who worked smart as opposed to long hours? Did I just land in a particular culture that is incompatible with my orientation towards productivity?
The man who brought the camera. The monkey cannot legally own things, copyrights or other, so the man owns the photos. 10 years ago this would not even come up. Why have we gotten so "feel good" of late? Life is not unicorns and glitter and nor should it be.
Sexier than what? I work with a lot of GIS software and this is incredibly basic.
Twitter reveals global linguistic "super-dialects"
Ethernet is mostly switched now (when was the last time you used a hub?), and the topology doesn't change the line speed.
Kickstarter Economics 101: The True Costs of a Successful Project
it has its problems here and there, but 2.0 on the Flame is really nice!
Would be more interested in "How Actively Breaking Existing Laws Transformed Airbnb Into a 'Billion-Dollar' Business"
I saw it. I clicked it on Firefox on Android and it did absolutely nothing. I even gave the page full time to load first. Multiple clicks. No response.
We're going to start planning PyGotham 2015 shortly after this one ends. Expect an announcement within the next couple months.
It doesn't work on Firefox on Android. At least it didn't this morning on my stock Galaxy S4.
thunderbolt and the predecessor firewire both have rdma.
I tried Sysdig when it first came out - I don't claim to be an expert, but I believe that this tool is essential for any modern sys admin that is dealing with cloud environment (I was at AWS for 6+ years, now at VMware).
A huge chunk of the web doesn't work without Javascript.
Self-Folding Origami Robot Goes From Flat to Walking in Four Minutes
The AA is out of step with research on addiction
It's quite different from what we do. However we also do have working GPU implementations in CUDA and OpenCL :)
It's sexier than something like QPublic, but much less functional.

For example: http://qpublic7.qpublic.net/qpmap4/map.php?county=ga_barrow&...

Ugly, but it's easy to get at all the data.
The problem with Vassal and other engines like this is that they focus all of their flexibility of solving the problem of playing a game, and virtually none on helping someone streamline the interface for people who are actually trying to play the game. The learning curve to use someone else's game is too high. They are two separate problems and they each deserve adequate resources to solve them.
After reading the 'simple overview' I have exactly the same questions as you. It's all nice that the contract runs and checks for conditions and such ... however the 'implementation' of the condition checking seem to be the Achilles heal of this whole thing. For example, the use-case of the online buyer, who would check the phone was shipped? Another 'smart-contract' ...?
Taking a Snapshot With Second Curtain
Most mainstream music (i.e. stuff that makes it into Billboard's charts) is obviously targeted at teenagers and maybe people in their young 20's. I'd say the same thing is true about movies. I guess I wouldn't call any of this for "children" though but I guess this becomes a boring semantic argument at this point.

Tangentially, now that I'm over 30 it's starting to become painfully obvious that new music is geared towards younger people. I don't want to be one of those people who are stuck listening to music of their youth, but its so difficult to find things that appeal to me. I.e. music and films that are mature but still are progressing and not relying nostalgia.
Unless the app gets killed I'm guessing it just pauses.
i like the underlying message (get out and try stuff, even if it doesn't scale), but is the core example (increasing revenue & possibly saving the company by iterating on the product) really a "design thinking" solution? it seems that this kind of thinking should pervade the whole team at a startup, not just be confined to the designers.

don't get me wrong, i love good design and have used google venture's design sprint methodology (http://www.gv.com/lib/the-product-design-sprint-a-five-day-r...) to great effect. but there's something about the term "design thinking" that draws a line that doesn't seem to need to be there, particularly in early-stage startups.
I highly recommend Krauss' book A Universe From Nothing on this topic.
I understand your sentiment, but I know weheartit has been around for a long time at this point (circa 2008). It always reminded me of a Pinterest alternative.
We used libvirt but its CPU topology support is currently broken and I didn't have time to patch it.

The MySQL test didn't perform much disk I/O, but I agree that it can be improved.
I like how their success story keeps changing. I think it was a TED interview or something like that I heard a couple years ago of their success story. Which was Paul Graham, convinced them to go meet their customers face to face to learn their customers and form a personal relationship with them. Now it seems to be bright pretty pictures.
Oh wow. Thank you so much for this realization!

I see that Codius requires a way to find non-colluding nodes to process your contracts. Mining is terribly inefficient and slow (can be fast with the GHOST or DECOR protocol though).

Looks like Codius might fit perfectly with the Bitshares Delegate system. The top 101 delegates could become the trusted list of Codius code processors. All Delegates could check the output hash of the contract of every other delegate and kick out the malfunctioning or bad delegate out of Bitshares altogether, just as they already do for transaction confirmation issues.

On top of that the Codius processors could be paid instantly with Opentransactions tokens which represent Bitshares based bitUSD/EUR/RMB, etc.

I highly doubt Ethereum could do better than this. This setup would be fast, secure, super profitable for delegates, and it would not suffer transactions per second limitations as much.

This is shaping up to be AMAZING.
Show HN: LINQ for Go
s
In my experience (I'm an instructor at one of these schools), the vast majority of incoming students already have a 4-year degree in a different area. I think for many people who may already be at a point in their life where they are paying off student loan debt, starting a family, etc., going without a significant income for another 2- or 4-years would be completely out of the question whereas a 3-month program is something they may be able to weather.
A truck driver uncovers secrets about the first nuclear bombs (2008)
It sounds like he wanted parallelism for performance.
This essay is pretty painful. For a much more enjoyable take on the question, I highly recommend Holt's book https://cmdev.com/isbn/0871403595. He talks to a number of philosophers and physicists whose opinions cover the spectrum from "the question is not worth asking" to "God is the answer", with a lot of interesting ground in between.
[edit: fixed misremembered book]
Yeah just saw that part. The abstract doesn't mention it, which is super-weird, and neither did the original Wired article.

But if they found the effect persisted when pumped down then that puts this way further into "interesting" territory.

EDIT: Ok I've just been through the paper, but it's buried at the end - "Vacuum compatible RF amplifiers with power ranges of up
to 125 watts will allow testing at vacuum conditions which was not possible using our current RF amplifiers due to
the presence of electrolytic capacitors"

There is a big description of the test rig, and how it can be pumped down to vacuum during tests, but they do not explicitly say that they pumped down to vacuum before running tests on the thruster. And the vacuum is never mentioned again until the very end, where we get this one ambiguous sentence. They might be referring to a new optimized thruster they couldn't test, or they might be saying they couldn't test in vacuum at all - it's never made clear and it's pretty damn important.
takes 100% cpu - main loop keeps querying for new property data even when the mouse doesnt move
Thank you :)

> The See A Demo link does nothing for me...

This is bad. It must be some corner case, maybe some Chrome add-on interaction (we tested the button with vanilla Chrome on Windows)? We'll have a look at this.

> The controls in the scene feel a little sluggish

This is a good suggestion and not hard to add, we'll work on it, thanks :)

> I'd like to know about what lighting/rendering tech you're running

For diffuse lights, we use a static, precomputed light map split into two channels (chroma and luma) to be able to take advantage of HDRI (this way our light map can make the original colors brighter, not only darker). For specular lights we currently use only cube maps with different resolutions (some also have a blur effect added). There is a lot of room for improvements in our specular lighting, we plan to experiment with specular cube maps, or dynamic specular lights that take into account strongest lights for a given fragment.
channels work fine in a single-cpu context, but in the setup OP described you won't be able to use them to have the various processes talk to each other.

At least not without using one of the various netchan-alikes or rolling your own channel<->ipc solution, neither of which is likely to result in an elegant solution (note how the original netchan was abandoned by the Go team).
Dextro - Backend Engineering (NYC full-time)

===========================

Dextro is a venture-backed AI-as-a-service company building an API that recognizes brands, objects, and scenes in photos, videos, and live streams. Our technology powers the next generation of vision-enabled apps, robots, smart devices, and data analytics tools.

We are a small, highly technical team of vision engineers and researchers from the UPenn GRASP Lab, IIT Delhi, Microsoft, and iRobot. Python, CUDA, C++, and Ruby are our core languages. We have 10^~14 FLOPS of compute on-site regularly being maxed out by experiments and performance testing.

This is primarily a distributed systems and web services developer role but you will have computer vision responsibilities. Though we expect significant backend dev experience, you will learn the vision that you need on the job.

We would be open to H1B visa and/or remote for the very best candidates.

Check out more info at dextro.co/jobs and shoot me an email at jobs [] dextro.co if you're interested!
hhaha that's probably why i couldn't find anything. I guess I'll have to build my own then.
Thanks.
I really like this idea. Now just need to figure out something to setup to use it...
That's not how I understood it. It says they're doing a hybrid STW and concurrent GC.

(a) A mutator may be stopped for up to 10 ms of every 50 ms by the STW collector.

(b) If more collection is needed, it will transition to a concurrent collector for the remaining 40 ms. Concurrent may pause stop a mutator for up to an additional 1 ms.

Therefore the worst case is 10 + 1 = 11 ms, not 1 ms.
The graph of the data with the high quality, bright photos showed a "WOW!"-like increase. I think they have a copy of the graph in Lean Analytics now. It is a dramatic change. Not like "Oh we saw an increase in traffic" but more like hockey-stick difference.

I think everyone knows better pictures are better, but I don't think anyone realized how much of a large difference it could make--especially in their area.

—Oh here is a copy I found real quick. As far as I know, they hired a few photographers, saw a statistical difference, and then decided to hire 20 http://i.imgur.com/VpYTF9L.png
Does Siri Mac Patent Mean Touchscreen for OS X?
My main thrust was that the last release was 2 years ago, and relatively, the changes in 5.0 were minimal. (async-await is nothing compared to changes in 3.0 and 4.0)
The title of the article is a bit grandiose; however I suspect their success is likely the net effect of many great small decisions like this.
One huge server-side imagemap. Yep, this is authentic 1994!

Whatever happened to imagemaps anyway? I guess they just went completely out of fashion sometime around 1998. Before that, they were quite extensively used to create webpages that resembled HyperCard at its simplest.
Everyone went to Ask.fm instead.
I'm trying to gently inform you what kind of content HN aims for. Snark which does not add to the discussion is among that; it gets in the way of discussion. I'm surprised you went ahead with saying it, knowing that.
Design thinking means that the non designer employees should think like designers. Not that the designers should do everything.
I don't necessarily think this was a design thinking solution. It was simply a pragmatic business necessity: do anything possible that improves the customer experience. Its what the boss of the company should have been asking his employees to think of.

Edit:spello
Probably. Despite all the propaganda, a bunch of "passionate" 20 something developers slinging javascript code are not worth $100K+.
I read them to mean that the one GC thread would stop the world for no more than 10 out every 50 ms, and in addition the concurrent garbage collector could ask any mutator thread to pause and do no more than 1 ms worth of GC work during any 40 ms non-STW period.

So in terms of real time, your deadlines could be no less than 11 ms.
How does this not violate the terms of your affiliate agreements?

Are the video ads from direct clients of yours or through a general affiliate program?
But shouldn't page rank be about content?
>This is basically trolling on an international government scale.
Do you also think that giving the refuge to the dissidents form the USSR was trolling as well?
Nice - nitrous.io has had this for awhile in their Hack Button (https://www.nitrous.io/hack), and I always thought it was pretty cool.
You mention two industries with extremely demanding performance profiles (financial industry and robotics). I don't know if I'd trust any 5 year old platform in those contexts.

There are lots of other contexts where the performance profile outlined in this document are sufficient. If you love writing Go, then I'd suggest staying out of the financial industry and robotics.
Japanese Retrofuturism?

Are people forgetting that Star Wars was a long time ago in a galaxy far far away?? Star Wars takes place in the past.

There is a major scene in Episode 6 where a primitive band of Ewoks takes on Empire Walkers using nothing more than sticks, spears, and logs. Light-Sabers are melee weapons based on an ancient religion (very fantasy-esque). Beyond all the space future stuff, there is a lot of "retro-combat" and high-fantasy elements going on here.

------------

Even Star Trek has its "retrofuturism" if you squint hard enough. Elves have pointy ears and are good at magic. I mean... space elves (Vulcans) have pointy ears and are good at science.

Orcs are generally evil and have deformed faces. But they're super strong. I mean... Space Orcs (Klingons) are generally evil with deformed faces.

Watch out for the undead (Borg). They might turn you into a zombie / assimilate you.
Have not seen a full border in years. Quite refreshing
An important lesson from nauseated iOS users: A/B test everything
Torturing prisoners, invading iraq on false pretense, sending drones/soldiers into pakistan, spying on allies... I think the US wouldn't have problems handling that situation, that's peanuts.
> This is extremely clever. One of the reasons WordPress took off was the easy, non-technical install process.

Ironically Wordpress is a pain in the ass to deploy on "non persistent/deploy with git" PAAS.And uploading plugins directly through the admin is a no go in these cases.

Worpdress wouldnt deploy directly with that one click install,given the fact the configuration is hardwritten on the disk.It would need some refactoring.

You'd need at least to enter some env variables to make things work,and the app would need to detect the db state and run migrations,if not properly initalized,when using a RDBMS(since again,sqlite is out of question on Heroku).
Agreed. It's way less functional than the ArcGIS server that's maintained by the municipality. It was a weekend project to play with d3, mostly. There's lots wrong with the site as it is, but it's a journey, right? Thanks for the feedback.
Most highlighted books of all time on amazon
This would be super amazing if it crawled entire sites.
PandaDoc for iPad is an easy (and cheap) way of electronically signing documents
Mailchimp vs. Facebook
tim ferris has done well for himself.
Interestingly, there was a game related to Chrono Trigger that was distributed by Satellaview: Radical Dreamers (http://en.wikipedia.org/wiki/Radical_Dreamers). I found funny that the article doesn't mention it, although I guess that the book will talk about it.
not really - because no party (nor US/Ukraine nor Russia/rebels) is interested in the official confirmation of what everybody knows really happened.

3 weeks before MH-17, rebels captured a full Ukrainian military installation containing a number of BUK missile systems and parts storage for them. They were able to repair one BUK launcher. There is no need for an electronics professional like Kerry suggested because Russian military system like BUK is repaired by swapping whole blocks (sourced from other launchers or from parts storage). A BUK launcher is only part of the system. It has smaller, less capable fire control radar (lesser range, only 120 degree instead of 360, lesser resolution) than the main BUK radar (which is a large radar on a separate vehicle, has full acquiring/identifying/tracking/targeting capabilities, and rebels didn't have a working one). Basically BUK launcher alone is a super-large glorified "Stinger". Using the repaired launcher, 2 weeks after capture, the rebels downed 2 Ukrainian transport planes and week later they celebrated, for half-an-hour, until the first people reached the crash site, the supposed downing of the 3rd transport plane.

Russia obviously doesn't want the public confirmation because it was Russia supported rebels who downed the plane. US/Ukraine don't want it because it was a BUK captured from Ukrainians, and Ukraine hadn't close the airspace and was accepting the civilian airliners' flight plans through the war zone (basically each time declare it safe to fly) even though the Ukrainian military were regularly flying the combat missions in the airspace, receiving anti-aircraft fire and losing planes to it, lost a number of BUK systems to rebels, after that lost 2 cargo planes to surface-to-air missiles at the heights not reachable by MANPAD missiles - and still didn't close the airspace and were still explicitly accepting civilian flight plans... This is why all this propaganda theories about a ghost lone Russian BUK launcher almost every night crossing into Ukraine territory and crossing back again.
This comment seems a little... prosecutorial.

Why should there be only one reason? It has been obvious for years that design is a huge factor in Airbnb's success, and that it's a lot more than "bright pretty pictures". That shit is hard and they nailed it. I'm sure they did some other things too.
Just a heads up - The Regex on the cell phone Number verification was so bad I couldn't create an account. I tried every possible method of entering my number.. couldn't get past the form.

Maybe sometimes you need more than a visual check =)
This looks really cool.

I kinda want to hijack this thread to ask what specific use cases people have for their Chromebooks? I'm pretty interested in it as a mobile (disposable?) terminal.

I found that Groupon has a refurbished C720 Chromebook for 130 bucks right now and it piqued my interest.
Http://www.huffingtonpost.com/2014/08/05/nazca-lines-peru_n_5648996.html