skysight-inc/HackerNews huggingface dataset:
>> How do they determine blade position?

I assume you mean the motor rotation angle. It's probably not a brush motor, but a 3-phase synchronous motor. That means instead of having a commutator to apply the voltage to the coils, a computer switches some FETs to apply the voltage. In the simplest case, the rotor is assumed to follow the applied voltage waveforms. In a more typical system, the rotor position is estimated from the applied phase voltages and measured currents (usually via PLL or a sliding mode observer).

If you mean "how do they determine the blade pitch?" then the answer is that they don't need to. The controller - weather that's a computer with inertial sensors, or a person watching it - will just manipulate the amount of torque variation until it gets the response that it wants from the copter. Much like you don't actually need feedback of your cars gas pedal position so long as you have vehicle speed feedback.
Thank you, I asked your sibling comment this followup would be interested in your response as well:

So I'm still confused here. What new kind of contracts could I build using the blockchain? What existing contracts are made easier because of the blockchain?
From the linked article. (Maybe a better headline would be "Stuyvesant kid has PR reps.")

> Where did Jessica Pressler come up with the $72 million figure?

I honestly don’t know. The number’s a rumor.

> She said ‘have you made $72 million’?

[I led her to believe] I had made even more than $72 million on the simulated trades.

At this point the PR reps jumped in with Law & Order style objections. A conference outside the room ensued. Back into the room came Mr. Islam.
Two deadly adversaries for product managers – Inertia and Entropy
I love the tag input. Let's tackle that soon!
In 1835, the New York Sun (a serious newspaper [0], 1833-1855) published some articles [1] describing alien civilizations on the moon that can be seen through a new telescope in South Africa.

From Wired,

> The Sun, ever the champion of the public good, claimed, no joke, that it was actually all a public service… to get the nation to stop worrying so much for a second about that whole slavery thing.

So, there are good journalists, bad journalists, "journalists" who aren't even journalists, and they've all existed since the birth of the printing press.

[0] http://en.wikipedia.org/wiki/The_Sun_%28New_York%29

[1] http://www.wired.com/2014/12/fantastically-wrong-thomas-dick...
Yes, you can do this with try/finally. But if you have an object that has an open file as a member, then you open the file in the constructor, and then use the open file in the member methods, and then... what? You may have a scope that you are exiting where that object becomes irrelevant, but it may be several layers away. Having to close that object's handle in a finally in that scope seems likely to be forgotten at least some of the time.
You're as mad as a sack of ferrets. Can't knock your enthusiasm.
I don't think pissing off congress is going to ever be in NASA's interest.
Now we just need a list of the most popular Internet applications of the last 10 - 15 years. I suspect that the web is still the largest non-proprietary application (perhaps followed by email), but it would be nice to see how it compares to the others.
But if he didn't present the media with a fake brokerage account statement showing a $72M balance ... who did?
Merriam Webster provides a second definition: "following the event".

Post-mortem is widely used to refer to analysis of a completed project, failed or otherwise.
He got one over on the media. His PR reps were in the room overruling questions. He knows exactly what he's doing.
I do hope they named themselves after the company in Ugly Betty on purpose.
Is Boost Better Than YC for Bitcoin Startups?
Ask HN: How much traffic does a job board site need for paid listings?
I'm working on an educational content-centric site as a side-project. I'm considering partly monetizing it with job listings.

Assume there are different areas on the site for everything from computer science to math to art to physics etc.

How much traffic to the relevant area would I need (e.g., computer science) in order for a company (e.g., Google) to consider paying for a job posting?

I know this is still very vague, but any ballpark numbers?
I find myself bouncing between at least three modes.

There are some things that I really know how to code correctly out of my head and in cases like that sometimes I put very little effort into testing.

If I am writing something greenfield that I don't completely understand (say some algorithm inspired by binary search or any other place where off-by-ones could eat you alive) then I would say there is little difference between coding and testing; mostly I use tests and the Java debugger the same way that Ruby or Python people use the REPL, except my tests get checked in at the end.

Another case is dealing with legacy code where I often end up writing tests to document existing behaviors and prove that the system behaves correctly after refactoring. I've seen many code bases that were awful (written by the kind of people who struggle to have unique primary keys) but were salvageable because they had a test suite.

Then on top of that there are a number of special cases too; for instance, if you are doing something with threads that is complicated at all you probably want to write a load balancer or if you're doing classic Map/Reduce you'd better test your mappers and reducers thoroughly before you ever touch a cluster.
I would avoid integrating directly with stripe, since if any trouble ever happens with your account (chargebacks, etc), and they terminate it, you need to change all your code before you can resume accepting payments. For this reason I recommend using an abstraction layer to buffer for payment gateways. One good option is Chargebee, which integrates with 12+ different gateways. This way, the same code can control different payment options, and you are not limited to one gateway.
Hey guys,

Fellow Chilean here, just glad to hear Startup Chile was in some way useful to you guys. Would have loved to meet you when you where around ;)

Cheers!
That is beautiful, thank you very much! That's the kind of "bug" people don't even notice.
Just a few days ago the New York Times took a google translate of an Italian Huffington Post article as the source for a papal proclamation.
I mean, I would also explore the option of just charging more. The difference between $5 and $50 probably isn't much to someone who's looking to use this resource to completely change their life.
Thanks. That looks promising.
We are updating the copy.. made it more visual also. A video is in the works. Thanks again
Bitcoin-Based Poop Delivery Service Earned $10K in a Month
Lessons from Life to Selling My Company
Four Areas of Legal Ripe for Disruption by Smart Startups
Ars pits casual flight sim skills against a real cockpit trainer
Adam D'Angelo on Quora and the Future of the Internet
That's just the syscall for waiting for a semaphore to be signaled. Most likely the crash is due to the main thread waiting for too long on that semaphore - it's likely stuck waiting for a network request to complete, and the watchdog kicked in and killed it.
The Emergence of the End-to-End Marketplace
Hack Reactor – code school
On another forum I was on, there was a guy with the handle Japhy who coined Japhy's Law: that which you most want to be true is that which you should be most skeptical of.

It came up all the time in political discussions as various participants would pull in sources showing how their side was right, but would crumble when subjected to the slightest examination.
That must have been oddly disorienting.
Amazon Maps API v2 Available for FireOS
OpenWorm Researchers Upload Animal's Brain into a Robot
On top of their long list of Yahoo branded services, consider that they own Tumblr and Flickr.

And Gmail is not nearly as dominant outside of the tech industry as it is within. There are many markets where Gmail is beaten by one or more of Hotmail, Yahoo, and AOL.
Something similar happened with the story about 4chan supposedly threatening to release nudes of Emma Watson a few months back. That was started through a plausible-looking but completely fake news site run by the hoaxers, who also set up a website for the hoax. A few seconds Googling would've shown that the news site was fake - there were months-old articles linking it to the hoaxers behind it and explaining how they'd tricked the mainstream media before - but enough sites were willing to jump on the story based on that one bogus report on a fake site, and then their stories helped to convince the rest of the media to go with it, and soon everyone was reporting on it. Critical facts like the claim it was started by 4chan had literally no source other than the fake news site, but by the time it hit the major news sites they'd been thoroughly laundered of their source.
I have been using the Google Sky version of the API for many years now at my star finder astronomy site (eg. http://www.starsfree.com/view/91.025/-24.3/M8 ). I don't know of an alternative. There is a Moon version and a Mars version, too. I don't know if the images for Sky, Moon and Mars are available to create an alternative, but if they were, I would be up to cobbling together a program to replace these.
The author's Twitter account is now protected, but when it was public yesterday she was tweeting about the bank statement:

"@helaineolen @felixsalmon @ReformedBroker We saw a bank statement confirming the eight figures, & I'm comfortable with what's in the piece"

— Jessica Pressler (@jpressler) December 15, 2014

Source: http://twitchy.com/2014/12/15/reporter-who-broke-bogus-72-mi...
For 'm of n transactions', you can choose to have multiple signatures required to execute a 'contract'. This can be 2 out of 3 signatures, or 10 out of 100 signatures, what ever you decide to set.

This is as good (and better) than current escrow services as it is decentralised, between the contracting parties only, and can have very fine grained conditional statements or scenarios before a 'contract' is executed.

In the example you gave, the escrow could consists of you, me, and a computer program. You sign to say you've sent it, the computer program I used to open it signs it, and I also sign it when i view it. So in this scenario, you could get paid when 2/3 parties have signed, or have a staggered payment structure of 50% when 2 have signed, then the other 50% when the remaining person has signed. This would be escrow, but escrow based on the quality of a digital good.

Hope that helps :)
I did most of the Earth API work for an educational application called StrataLogica:

http://www.stratalogica.com/

This marketing video of theirs has some examples of the stuff we did with the Earth API:

https://www.youtube.com/watch?v=Jl2HWhPEpIU

One very frustrating thing was that several of the interactive tools I built duplicated features that were available in the Earth desktop client but won't exposed through the API: line drawing, image placement, etc.

But it was clear even back then in 2009-2010 that the Earth API wasn't getting much attention within Google - rare updates with few new features added - it felt very much like somebody's 20% project. So we didn't wait for Google to add those features but built them from scratch.
> This kind of scares me. I don't know much about the case, but the guy is an IT worker, and it's hard for me to believe he'd have such terrible opsec

There is a wide range of "IT workers". I would guess that 50% of them could easily make this mistake. Security is hard. Maintaining a bunch of computers with poor security is easy (ask sony).
Thanks for the reply.

Are there any guidelines or "best practices" for writing code for both 2.7 and 3.4?
"Sadly (?) it turns out this was achieved in simulation rather than with real money.."

Actually he says directly that he doesn't know where she got the $72M figure. He doesn't say in this interview exactly how much he would have made in simulation, only that "The simulated trades percentage was extremely high relative to the S&P". The point being that I don't see any evidence here to support that claim that he made anywhere near $72M even in a simulation.
So, you're not an expert, but I'm still defensive, irritable (with) black and white argumentation when the pro-white side (presumably me) feels under attack....

I am pakeha but went to bilingual school, am pro treaty settlements, predominantly hunt WITH Maori people, have been involved with Maori society my entire life and my family members are buried in a Maori urupa.

Please be more careful about the snap judgements you make based on a single comment.
WTF is doing AOL in the top list nowadays? Genuine question.
An example from my understanding: I want to buy something off an online merchant. I send them the payment, but I make it a multisig payment that needs to be authorised by their signature plus the signature of the delivery company. I expect the delivery company only to authorise the payment with their signature once they have confirmed successful delivery.

This way I can authorise payment without entrusting the funds to a third party. If the delivery company doesn't authorise the payment, the money is still immediately available to me.
So basically it will be book/short guide on how to teach both coding and job search skills? As somebody on this thread has said I would doubt about the quality. However I would not mind trying a chapter to assess the quality of the product/service and then buy it.
The British National Health Service can make that trade-off. Because the NHS covers the entire population, it knows that it will recoup the high up-front cost by avoiding other treatment later in the patient's life.

An American insurer would rather put you on the older treatment and make your life so miserable that you switch to another insurance company at the next open enrollment. It makes no sense in the aggregate, but it makes sense for any one insurer.

No insurer wants to have the most generous policy, because it will just attract Hepatitis C patients from other insurers, hitting them with the up-front costs. However, they would not get all the delayed savings, because the patients could switch to a different insurer after they were cured.

The only way to break the game-theory logjam is to force the drug to be covered nationwide. Then, all the insurers pay the up-front cost, and on average, all of them reap the savings.
Thank you for the magnificent answer. It seems like a good idea to create a separate service to handle the registration. My app is backed by a REST API (I know, I am so trendy), so it would just be to call that one and a call to Stripe's API and be done.

One thing I realized now, reading your answer, is that the customer's plans should be changed depending by the user's usage (think storage space). Should I be running a cron job once or twice a day to check the usage, compare it to their subscription plan and update it at Stripe? Of course notify them by email, and maybe give them a day to re-do and not give them unexpected charges.
In some ways this is deceptive in a smartphone world, if you consider all the networked Apps that also vie for "connected" screen time.
No new contracts just new variations on old contracts. I don't really see much value ad myself but I'm generally on the skeptical side of the bitcoin discussion anyhow so don't just take my word on it.
Me too. I was like, who the heck is that? And then I searched and found them... and I'm like... I don't think I've ever even heard of any of their properties before. Would love some insight into who is visiting their stuff...
That's just not true, as UN stated last month. Population, particularly in Africa, is growing instead of stabilizing.

http://www.scientificamerican.com/article/world-population-w...

Vaccines without sex education and birth control support programs are extremely irresponsible. We need both, just one is trading off a short term problem for a bigger long term problem.
Huffington Post
Thanks, we changed the URL from http://www.wiredtiger.com.
Understanding the Large System Volume Information on Your Server
Millennium Falcon's SFX Demonstrated by Sound Designer Ben Burtt (1980) [video]
I was responding to a comment claiming that Go is better than C in discussion about generic programming. I pointed out that C in fact supports generic programming (actually by void pointers and function pointers). Why you (and other downvoters) respond with the way to do it in Go isn't quite clear to me. I didn't claim anything about Go. I claimed something about C.
True. My cat really loves his catnip.
Palringo Hits 35M Users Globally After Sticking to Chat Inside Mobile Games
I believed him, too. But Rosling & co.'s assumptions were completely wrong with regards to Africa.

http://www.scientificamerican.com/article/world-population-w...
Upfront Ventures Raises $280M
Kill Me Softly – Kill processes in a reliable manner
Ha, no, no product, it's just what I call the list.

I use IAWriter for it, but you can literally use anything.
There's really nothing wrong with just offering paid slots and letting the buyers decide if they're worth it.
The average news consumer expects bite sized, outrageous chunks of information to wash down with lunch – it's a two way stream of degradation.
Wow, the results are quite eye opening. I'm admittedly not the most "diligent" when it comes to testing (I write enough to pass code review), but I would definitely fall in the camp of overestimating the amount of time spent testing by 3x

But I'm not quite sure if there is a direct correlation between time spent writing tests and overall software quality?
The real shame is that this article would have still been great even if she'd done the fact-checking and found out he was lying. You've got two kids in suits buying apple juice and caviar, trying to convince a grown woman that he's worth $72 million. It's the makings of a great Vice article. I would have loved to read about these two kids as they try to pull a highly-transparent confidence scam while all the adults in the room know they're lying.
Unless you have the delivery company inspect every package this doesn't actually solve the "Sent a brick in a box" problem.
Not an especially informative wikipedia page as it mostly discusses the company's accomplishments with a bit of a PR flavor. No list of their 'over 4000 blogs and lifestyle websites'. Per the wiki, they've raised over $300 million in venture capital and get hundreds of millions of unique visitors...but it just surprises me that I hadn't heard of them and all the info about them just reads like marketing babble.
Often I need to kill processes, and wait until they're dead. I want to send a SIGTERM first, then a SIGKILL if it fails. And I want this process to be automated. That's it.
People enjoy pretending hard journalism is the rule rather than the exception. Having the internet & cable news destroy it is just another part of the fantasy TV shows like The Newsroom enjoy telling.
The Freedom Hosting event was over 1.5 years ago. I'm starting to wonder if there was some procedural / legal issue with that operation. I don't know what would delay the investigation this long otherwise.
I doubt anyone here believed it. The rest of the Internet? All bets are off.

Look at how many Buzzfeedy hoaxes get passed around like wildfire on Facebook, week after week, often by the same people in your circle. Some people -- and by "some," I mean a disappointingly large proportion of people -- don't think critically about what they encounter on the web. For them, it's not about the article. It's about the headline, and how the headline makes them feel about themselves, about the world, or about their friends. By the time they see a catchy or feel-good headline, they're already racing out to share it with everybody. If they actually get around to reading the article attached to the headline, the reading is incidental.
Here is the blog post from MongoDB's co-founder: http://www.mongodb.com/blog/post/welcome-wiredtiger-mongodb
The reason for the word change is because it is conceptually wrong

The action of being in the country might be unlawful, but the person himself is not unlawful. The use of "undocumented" instead of any other word not a "tactic to downplay the issue", instead it express the lack of legal residence status is due to not been able to obtain documents to correct its residence status

If we transfer the characteristic of the action to be a characteristic of the person then if you have drive above the speed limit, you are an illegal driver; and so on

But don't worry, I am pretty sure ICE was waiting for him outside the court
I sat next to the Yahoo customer service for a while. Users called in every day and offered to send passport copies or copies of printed emails. One guy really came in person to the office. The response was always the same: "The person who signup up years ago didn't send us their passport so we can't use that for verification". Quite a few users also used fake birth dates (Jan/1st 1901), nonsense security question answers like "-" and fake backup email addresses which doesn't help.
Anyway. Don't be surprised if showing up in person doesn't impress them.
Apple Pay Now Supports Cards That Make Up 90% of U.S. Credit Purchases
Have a look at which cities craigslist charges for, how much it charges, and for which specific kinds of jobs.

For example, http://portland.craigslist.org/ charges $25.00 to run a "software / qa / dba" ad for a month, but nothing at all to run such an ad at http://spokane.craigslist.org/

It's not really the traffic that counts, but conversions. How much money do _you_ really need? Are you working full-time on this? If not you might be better off to charge little or nothing, so as to build market share.

Most job boards don't do much to market themselves, other than maybe send some spam. There's a lot you could do yourself. Suppose you have a local job board, you could show up to MeetUp groups and the like to promote your board, pass out handbills in public places, send flyers around to student employment offices at universities.

You won't need much traffic at all, if the people doing the hiring are able to find lots of qualified candidates through your board.

This is a highly competitive area. There are bazillions of job boards, however most of them totally suck, so you have the opportunity to do well by doing good.
Neal Stephenson Joins Magic Leap
But truth is fleeting. Despite all Sarah's work on Serial, there is a possibility that some contradicting detail will emerge as some point in the future. Even the infamous Best Buy phones waver between fact and fiction.

To this point, it may be impossible to fully fact check an article to the point of certainty, but New York magazine could have at least done better.
Adyen Raises $250M from General Atlantic
How Big Data Shapes Urban Waste Management Services in Manchester
In all seriousness, SEO in the sense of the word that we used to know has not existed for a long time now. Once upon a time SEO was really just counting how many incoming links your site had and the keywords you were using.

Search engines like Google have become far more advanced in the last 4 or so years in regards to what they can parse and understand. They don't just follow links, they analyse your content, they factor in the response time of your site, whether or not your site is responsive and tonnes of other things.

I think the best kind of SEO in 2015 and onwards is just building a great site. Nicely optimised, use gzip compression, minify and combine your CSS and Javascript, use icon fonts and the big one: write great content and people will naturally link to it.