skysight-inc/HackerNews huggingface dataset:
The way I understand it makes it seem like a principle applied at the teacher/classroom level. The material that needs to be learned is the same either way. The important part is having the teacher teach and inspire their students in a way that encourages a growth mindset. The ideal case for physical material is in training teachers to effectively encourage the growth of that mindset.
>It must have a survival advantage or we would have stopped doing it.

LOL yea because we have totally stopped polluting the earth or filling our food with sugar. Give me a break, this is pop evopsych at its worst
lol. You don't need crime prediction software to figure out which neighborhoods could benefit from a youth program.
French stores are forbidden to give non-reusable plastic bags, precisely to nudge everyone to switch to reusable bags.
Steal a TARDIS.
I am quite surprised to see their response. First thing, this whole wallet business is fishy and full of security vulnerability. Who is certifying/auditing these wallets companies like in case of internet banking and card transactions?
The real problem is that there are "only" libraries at all - too many of them. It kills the python ecosystem in a really disgusting way.
3.5M Commons
The problem is that reducing thickness is a selling point/feature for a lot of people on Apple products, but the compromises made in exchange for thinness cause problems for people who don't value thinness over other things.

Having said that, it's important to note that CR did not give the Macbook Pro a Recommended badge (think of it as the equivalent to "Editor's Choice"), it doesn't mean they're telling people not to buy them either. The headlines are somewhat misleading about this.

Personally, even though I've left Macs because I don't like the direction Apple has taken, I'm still hard pressed to say that the current crop of Macs are horrible just because they don't cater to my specific needs. For the vast majority of people looking for a higher end laptop, they're perfectly fine (albeit pricy). I've gotten over the fact that "Pro" in Apple speak no longer means "Workstation Class" (or something close to it).
Families is fair, but I think my advice still stands.
Yep. The extra second is the 60th second. http://earthsky.org/human-world/leap-second-june-30-december...
Not creator here. "Flash-like content authoring tool for HTML5" isn't catchy at all, that's like calling an iPod "Digital music playing device". Branding and marketing count.
French woman wants to marry robot
A comment I've heard that I suspect has at least some truth to it is that France has something of a monoculture around French food. That may well be overstating it. But I think it's fair to say that there is a highly optimized supply chain around delivering a specific cuisine and rather high consumer expectations around that cuisine.
It's my understanding that the current Rust web framework landscape is dealing with moving over to futures (example: https://github.com/hyperium/hyper/issues/934).

The framework seems to nail the API, but what's it doing down at the bottom of the stack? Any benchmarks?

Apologies if they are somewhere obvious, but didn't see it on the site.
Personally, a leap hour seems about the right level of granularity, but I suppose an approximately once per century leap minute would be ok. But leap seconds are a waste of time.

If ignored since their introduction in 1972, official time would be out of sync with the Earth's rotation by 26 seconds. There's been a lot of running around and gnashing of teeth to correct 1.845668179868485e-7 error that isn't even an error most of the time. The 26 seconds of error fleshes out as 7.389 meters at the equator when using celestial navigation and for anything that accurate we use radio signals not a sextant.

The Earth's rotation and revolution are useful abstractions at a certain level of granularity. But the reason we have atomic clocks is because those abstractions break down when we need precise measurements of reality. Reality is real because the rotation and revolution of the Earth are not cosmological constants. Leap seconds are an expression of the superstition that humans control the arrow of time: as if one thing happening after another would cease to be the case without them.
You have no idea what his ancestors wanted.

I have two kids and whether or not they have kids makes no difference at all to me. Likewise, my parents never pressured me to have kids.
Small to mid-size funds may not be able to get away with charging 2-20 but larger, more established funds still can regardless of size. Tudor was charging 4-23 on one of its funds. Not sure if that's still the case since they were down a bunch this past year.
You can totally enable mouse selection if you like:

set mouse=a
set ttymouse=xterm2

You may have to enable your terminal's mouse support, if you're running Vim in a terminal.
5 Cool Innovations Already Happening in Spatial OS
I think, as a Bayesian, you're putting too much weight on your priors about the importance of IQ and are not interpreting the paper correctly. "Achievement" in the context of the paper refers to scores on achievement tests, whereas the thing of actual interest is 'life outcome', and the analysis of that starts on page 3.
> This demonstrates the brilliance of Rust's syntax extensions.

Sadly this functionality currently requires nightly or using a code generating build script via syntex :(

(Rocket currently only works with nightly, but someone could pretty easily add a syntex port since the APIs are the same)

With macros 1.1, some of this functionality is available on stable, but not the functionality needed by this. I don't know if we plan a "macros 1.2" that stabilizes tokentree expansion for all decorators (not just type item decorators). ("Macros 2.0" is the final polished version of Rust procedural and regular macros, for which there are concrete plans but it will take time to get to)
That first paragraph is a perfect expression of the last election - the Ivy League guy can't figure out how to talk to the plumber, even when they're in the same room.
I get that the chinese manufacturers reverse-engineer everything, but you're saying that you can use "thunderbolt" on your packaging without paying some licensing fee to apple?

I mean, a bunch that just have the no-name plastic-bag packaging probably slip by on Amazon, but I would assume the lawyers wouldn't let you brand your cable "thunderbolt" without some official licensing fee process.
Fixing the Internet
Ask HN: What is the state of the art in BCI?
As the title asks, what is the current state of the art for brain-computing interfaces? With regular machine learning breakthroughs and popularity, I figured some good chunk of that would be improving BCI devices to the point where controlling a PC with BCI devices can't be too far off.
Humanities and social sciences are not subpar topics. But the actual execution is often, mmm, duboius and/or biased.

This probably holds equally for natural sciences, but these latter have the fortune of rather easier checking against reality.
> Why aren't hedge funds compensated based on some sort of alpha, the difference from a benchmark?

They usually (EDIT: sometimes) are. The 20% is typically (EDIT: has been in my recent experience) measured against a benchmark. The trick, however, is in selecting and/or constructing that benchmark. There are also as many definitions of alpha as there are hedge funds.
I sense a trend of trying to cram everything good about native apps onto the web. Do people who do this stop to think whether the web is actually the correct platform for their app?
I'm calling it the MacBook Vista.

Ouch.

After seeing the touch bar, I think it's really not all that useful. I would much rather have seen more battery, RAM, faster CPU options, traditional USB and HDMI, magsafe, and more SSD. Basically take the 2014-2015 MacBook Pro and beef it up and I will be very happy.

People say it's selling. Of course it is. Mac still has a near-monopoly on "Unix with good UI." But if they keep doing this, it will erode. Windows is becoming nicer in many ways, MS and other PC hardware is getting better, Linux desktop is steadily improving, etc. The ecosystem never stands still.
Revolutionizing marketing with interactive email
What question do you ask at the first booth?
>> Lastly, it's just silly and inaccurate to call the iPhone "disposable", when in fact it leads the industry in terms of how long the product lasts, how long the OS is supported for older hardware, etc. By a wide margin.

That might be the case post iPhone 5 (maybe someone can verify this), but it wasn't the case before that. The last available update of iOS for every model pretty much made the iPhone 4S and earlier unusable to all but the most patient users, and that's with very little software installed.
I think price is the only real complaint I have as well. I've only bought Macbook Airs because they were thin and light even though I wanted the power and connectivity of Macbook Pros. This is the first MBP that I want to buy.

By the time I'm ready to replace my 2012 MBA I expect the price will have fallen.
I find that simply making people feel comfortable being themselves around you is the easiest way to make friends.

I am not attractive, influential, connected or rich, but I also don't expect anything from people... as in I'm not trying to gain anything from them, not that that I have low expectations of people.

I find that people appreciate social interactions where they feel comfortable being themselves and don't feel like they have to be on guard or put on a mask lest they find themselves in some kind of obligation or awkward situation.
Is this different from somewhere else that you've been? Or are you just offering the datapoint that you are in the US, and in the US you have observed this to be true?

I would think, given my travel and cultural experience, that the US would be one of the least problematic countries from the PoV of being allowed to challenge "authority" and ask "why" without catastrophic career consequences, but would be interested to hear other perspectives.
Yeah - I'd call it "animation" instead of "flash".
High value cash wasn't eliminated. In fact, quite the opposite: previously the highest value note was Rs1000, now it's Rs2000. Although calling $30 high value is a bit of stretch.
"Why aren't hedge funds compensated based on some sort of alpha, the difference from a benchmark?"

This is called a "relative return" strategy. Suppose the benchmark falls 70% and the hedge fund loses 50%. Your hedge fund manager has lost half your money, but has beat the benchmark by 20% (i.e. "positive alpha"). How does a fee based on alpha work in this case?

Hedge funds generally claim that they aim to achieve a positive return on investment regardless of whether markets are rising or falling (i.e. "absolute return strategy"). In theory, this means that hedge funds should have low correlation with the benchmark. This low correlation is attractive to investors because it provides a diversification benefit and (in theory) improves their efficient frontier. Low (or ideally zero) correlation to the benchmark is the main reason that institutional investors are willing to pay expensive hedge funds fees. However, if hedge fund managers have incentives based on relative returns to the benchmark, then hedge funds will be more correlated to the benchmark.
I received an "interactive" e-mail from Taco Bell today and of course had to know what black magic was happening on my iPhone. I guess this has been brewing for a while but it's the first I've seen of it. I love the fact that it took some junior developers to question the assumptions that everyone knows about e-mail development and discover these solutions.
That's a great talk, thanks for the link.
As I understand it, print() was created not from a sense of consistency, but because a few awkward cases could be simply solved by turning print from a statement into an expression. Use in lambdas would be one example.
I'm not sure the insights into things already well-known are that sophisticated. I'd imagine it's more along the lines of "computer thinks street crime less likely to happen if there's a visible police presence outside bars on Friday night" (or applied to Dubai "if you maintain a visible presence at these hotel bars the men in them will have to book their prostitutes online instead" and "watch the foreign workers closely and your conviction rate will skyrocket")

These sort of predictions "work", for certain values of work...
10 bit, 32 channel, 80 Msample ADC is <$300 [1] at prototype quantities, and <$150 at production quantities. 12 bit, 64 channel, 80 Msample ADC could be done with 4 of these [2] for $620.

An AM5716 or 5726 would be $30-$40 (although buying one is a little trickier). Thats 7-8 processors in one, plus 1-2 DSPs. Plenty of power to handle all the processing required. Even a 128 channel device should only be ~$2000 in parts (minus the transducer). One with limited capabilities should be <$500 (again, minus transducer). Much less if you make a few more compromises in the ADCs.

We can make SDRs for incredibly low prices nowadays, the only real difference between that and ultrasound is the number of channels. The only reasons ultrasound machines cost more than 5 grand are economic inefficiencies. The engineering has been solid for a long while now.

[1]: http://www.digikey.com/product-detail/en/linear-technology/L...

[2]: http://www.digikey.com/product-detail/en/texas-instruments/A...
Exactly. This is the real problem here, not the fairness of the fee structure. There is vanishingly little "small dollar" money in these funds. The median investor dollar in a hedge fund is a big player, and expected to be sophisticated about these things and to understand how the risks work.

The harm is to the market as a whole, not the poor investors who get hurt in a down market.
> It isn't even like its closest competitor: private equity. They only get to take performance fees on exits, which can take years or even decades (or never) to materialize.

I would argue that private equity is much worse on fees than hedge funds. Among other offenses, they're able to charge fees to both portfolio companies and investors. The investors usually get a credit for the fees paid by portfolio companies, but it's not a 100% offset.

To an outside observer, this seems to buy you performance that isn't too different from exposure to infrequently marked leveraged standard risk premia.
No need to be rude. Libraries can't reasonably be expected to support old versions of the language indefinitely - languages have to be able to grow and evolve or they will die.
It is possible your device may not see a leap second, only eventually observe that it is running one second slow, and smear to correct for that.
Fees are coming way down in the industry - very few shops can charge 2 and 20 these days. A flat fee of 1% is much more likely. Bill Ackman was a rockstar od the industry, so could get away with it for longer than most. Not any more.

Even in the old days, 2 and 20 was the starting point for a negotiation. If a client can bump up a firm's assets under management significantly, they have a lot of bargaining power.
SuperMicro has their IOPS optimized Ceph storage SKU's, that is what was used. Looks like they have updated since we purchased:

https://www.supermicro.com/solutions/storage_ceph.cfm

We went for upgraded network capacity though, 20 Gbit/sec cluster backend, 20 Gbit/sec cluster frontend...

12 * 8 TB drives, with 800 GB NVMe for the Ceph journal. Fast, large Ceph journal was key.

Total installation was about 3 PB raw, that is 1 PB useable with replication size 3. 33 Ceph OSD nodes, 3 Ceph monitor nodes and Juniper low latency switching using the QFX5100.

Full IPv6 network on both frontend/backend. 11 nodes per rack, each rack being it's own /64 routed domain. 3 racks.

I'm no longer doing contract work for the company, but last I heard they were expanding it out to 6 racks with an additional 3 PB raw capacity added on because of growing datasets.

It's an OpenStack cluster that is connected to this Ceph cluster, 40 Gbit/sec storage backend network, with 40 Gbit/sec front-end that VM's have all their traffic on. So storage and standard traffic don't mix.

The performance and IOPS even virtualized were enough that the entire company is moving their bare metal databases to VM's. I am unable to disclose IOPS or Oracle database performance due to contractual obligations unfortunately.
Yes, but the author still continually describes it as a rejection of the division of labor.
Doesn't Chome on iOS prevent this because it reloads whenever you re-open a page, even if you don't have an internet connection?
This doesn't deserve to be the top comment.
Actually, yes. Most tor users would be greatful if you used tor to browse cat pics, as it strengthens the entire network by having more people using it.
There is usually an inverse correlation between Sharpe ratio and capacity. That is, strategies that produce very high risk-adjusted returns stop working if you crank up the size of the book. So the groups running the really high sharpe stuff (HFT latency arb, for example) don't even bother taking outside capital since they wouldn't know what to do with it. This also allows them to keep a higher portion of the profits. On the other hand, groups that are doing lower sharpe but higher capacity strategies (say, Bridgewater) need to raise giant pools of money from outside investors. So really, the most sure bets aren't available to the public.
My feeling is more people need to stop and think "Why isn't this just a website".
Some strategies aren't about beating a benchmark but providing non-correlated market returns. By that I mean returns which don't go up or down based on the direction of the market.

A good example are catastrophe bonds and weather derivatives. Both are completely uncorrelated with the market, dependent more on weather forecasting, actuarial tables and region specific data.
If you need to build cross-platform apps - and that is mostly the case nowadays - the web is actually not such a bad solution. I mean, what is the alternative?
"You may not agree with him, but isn't that the point of the comment section - to comment on the subject."

I said I agree with other comments that disagree with him - I don't see why I should comment when there is nothing more to add. However, your comment is a fair argument, so let me comment on it.

"His statement was "financial education rather than handouts". Considering more than 60% of american's are in non-mortgage debt, this is a fair statement for both sides."

This misses the fact that many people do borrow because they are poor. In the U.S., IIRC, biggest cause of bankruptcy is medical care. And as was already pointed out, these problems are solvable with a good social safety network (as we empirically know from other countries).

On the other hand, there is also financial responsibility of the lenders, or rather, lack of it. Perhaps we should start educating them?

However, that misses the big point. Debt slavery is a very real thing - for many lenders, it is convenient that people are in debt. If you think many people go in debt because they are financially illiterate, you are the one who is ignorant about the world. Of course they often know it - they just don't have a better choice. It's just like people who go to fight in wars - of course they know they can die.

And regarding the economy, if you successfully teach people in debt how to save, you are going to have a recession due to debt deleveraging, but that's for another discussion. But in long term, I agree (if that's your point) that more equal society is better for economy.
I see the author's vision, but I have to say that I still favor progressive enhancement over this. Using javascript only assumes a lot about the user even in this modern age of web development.

Also as a nitpick, I would say don't make your data objects SINGLETONS, make them SINGLE INSTANCE.

EDIT: someone deleted their comment but brought up a good point that you can have progressive enhancement with this. Yes, however the author made it clear he favors the JS or nothing approach. And there's even this snippet:

>An offline first approach would be to move the entire MVC stack into client side code (aka our app) and to turn our server side component into a data only JSON API.
"_" is kind of the equivalent of "x => x" (only rather than x it's some temporary generated name that doesn't overlap with anything else). So you'd write "_ * 10" rather than "i => i * 10"
Apple doesn't own Thunderbolt:
http://www.intel.com/content/www/us/en/trademarks/thunderbol...
"They usually are. The 20% is typically measured against a benchmark. "

That is incorrect. The 20% refers to a fund management performance fee equal to 20% of all profits (without reference to any benchmark index). However, there is usually a "hurdle rate," like 5%, so 20% refers to 20% of all profits above the hurdle rate. There is also a "high water mark," so that past losses are counted against any "profits" to which the performance fee is applied.
Hedge funds and PE firms aren't typically direct competitors. The goals and risk profiles of the funds don't typically align (and hedge funds aren't monolithic as a group, either), but beyond that, there are typically regulations governing which entities can invest in which type of funds. The LPs in big PE funds tend to be large institutional investors--pensions, endowments, and the like. Hedge funds tend to have mostly high-net-worth clients.
https://github.com/SergioBenitez/Rocket#future-improvements

Today, it's built on top of hyper, which is still synchronous. It's also only using the lowest parts of hyper, apparently.

There's a branch for tokio integration, but needs the tokio 0.1 release, which is coming soon but not _quite_ out yet.
I do not think it is about willingness. They tried and still trying whatever they could. It is just that economic realities of India put them in their place.

Somehow the rather unfounded assumption was say they serve 50 million customers today and Indian population was 1.25 billion so there is opportunity to grow 10-20 times. The simple fact is 50 million might be close to maximum market size as remaining population simply do not have that kind of incomes to sustain e-commerce companies peddling frivolities. I say frivolities because if I am earning USD 5K/year equivalent in India I am in top 1.5-2% Indians. By Indian government tax data less than 3% people file income tax returns in India and remember those all who file returns does not necessarily means they pay income tax.

There is of course no reason for Flipkart/snapdeal founders to admit basic facts as their companies made them fabulously rich.
Networking effects are serious stuff. If you use it, you’re more likely to recommend it to others—or for public stuff, others will see you using it—and then they’ll start using it. And some of them will pay.
I still have a 500 rupee somewhere; most likely packed in a box in my parents' basement.

Did no one consider the consequences of this move? Surely there were people in government that testified to the fact that over 80% of the currency in circulation were these larger bills?

Either this was intentional to move to the country to electronic payments or some elected people didn't listen to anybody, did no analysis and were so clueless they didn't realize this would happen?!

If their elected officials really cared about the people as much as they cared about stopping corruption, they should have figured out some type of gradual roll-out policy. Or they could have simply allowed 500/1000 notes but refused to print any more and ordered banks to send all of those notes to their mint. They could then slowly replace the notes over a year and eventually, declare 500/1000 not legal tender after a year, rather than trying to do this all at once.
I'm describing data from '07-'10 across markets, not how I believe things might play out. Don't troll, show data otherwise.