skysight-inc/HackerNews huggingface dataset:
also at:
http://tech.slashdot.org/story/13/11/14/2316242/tsa-screenin...
It can only act as a physical proxy to a digital account which uses magnetic stripes as its primary physical form of transaction.
Doesn't the merchant bear the cost of the fraud ONLY if they'r e using obsolete equipment?
3 letters
For fun you can even scan friends cards.
How To Create The Next Jonathan Ive
It's not illegal but it might run afoul of your merchant account terms.
There's the old favorite http://shootout.alioth.debian.org/u32/which-programming-lang...

But it's down at the moment http://downforeveryoneorjustme.com/shootout.alioth.debian.or...
It's not too strong to say that - they've been used for many years, there are decent financial incentives for organized crime to clone the cards, but the industry hasn't seen any "chip skimmer" yet.
There's some irony in that plastic bags wrapped around the head are normally a suffocation risk for children, yet used in this manner could potentially be a lifesaver.
I am always paranoid when it comes to technology and money, and this will be no exception. BLE (Bluetooth Low Energy) has been around for 2-3 years now, but I still consider it to be in it's infancy. This is especially true when it comes to security. A quick Google Search produced two examples [1] and [2] of potential security flaws with BLE pairing and authentication, and I'm sure there are many more I'm not aware of. Building new payment technology based on new and cutting edge communication frameworks does sound exotic and cool. It's probably one of those "cool points" that gets investors excited. But for the security minded folks out there, this is likely a red flag. Instead I see it as building payment related technology on an un-proven communication framework, and it just does not sound like a great idea. And it is because of this that I will probably never personally use something like Coin regardless of how useful it might be. All it takes is one person to create an effective exploit, and there goes both your money and your trust in the Service. In any event, good luck to Coin with this new Product, and I hope they prove me wrong. If they are looking for a recommendation (which I'm sure they're not), I would recommend a sharp focus on securing the BLE connections between the Coin Wallet and the Smartphone Device.

[1] http://lacklustre.net/bluetooth/

[2] http://eprint.iacr.org/2013/309.pdf
HealthCare.gov targeted by more than a dozen hacking attempts
I would expect that that magic number 3 is related to the size of a cache line relative to the size of an array element and the time spent in each loop. You will want to prefetch the next cache line so that it is just available by the time you want to start processing it (and, ideally, not a moment earlier because that would push data from the cache that still could be used before the requested data is needed)

A robust implementation should figure out the size of a cache line and the load delay, and derive the magic offset from that.
You may be right about the story, but I don't really see the obstacle to it happening. If you initiate a call in the air, you could easily not be able to communicate with the cell directly below (since they don't radiate much signal upwards) while being able to talk to two that are adjacent to it. Since those two cells would never have a reason to communicate in normal operations, confusion ensues.

I know that lots of pilots use mobile devices now, but we're talking ~30 years ago.
ideas...ideas...ideas..great!
Wouldn't you have the image of the card in your phone anyway? So, your analog card would still be in the drawer at home, just as before.
I'm sure this was a cool and fun dev project. I've used a program like this before: http://www.derlien.com/ to visualize and edit/delete files.

But for space management have since switched to http://spacieapp.com/
For compatibility, penny will offer a special adapter that will decrease interference with some card scanners.

You can purchase this compatibility adapter for $3.95 for 66 feet: http://www.amazon.com/Scotch-Electrical-75-Inch-66-Foot-0085...
Thanks Jackson - there's a ton more feeds and API calls I'll be adding over the next few months. I'm currently working on building an API to serve real-time NYC subway estimates
I investigated and I say this is wrong. No backup either.
= The point.

Now then again, I actually fly every of these so I pretty much know what the efficiency is.

YES they gain 25% efficiency with the tricopter that has a huge prop in the middle, I TRUST that. But the test is meaningless:

If you change the 3 props instead and put big props, with corresponding motors. Guess what. Efficiency is probably higher than the 25% difference. I actually design my own. In fact, I also design my own control boards (the software that is)

Quadcopters use accelerometers, barometers, gyroscopes and magnetometers (and GPS) to ensure stability.
Guess what. Measurement from these devices isn't 0ms. Actuating the motor control isn't 0ms.

On regular 1 rotor head heli it isn't either. In fact, it's longer.

Result? it's more stable with 4 props than one prop. It has more inherent stability., even if it wasn't "computer assisted". Timecop did a fully gyro stabilized quad copter recently that shows exactly that, if any "actual proof" was needed. Gyro stabilized can be made with no computer whatsoever (like helicopters are/used to be - that's why they're very, very hard to pilot, real ones and RC ones).
I was thinking the same thing. A full 60% of MasterCard and Visa transaction are now paywave/paypass. That's pretty impressive uptake, and I'd imagine it will be just as quick one introduced en-mass overseas. Would love to know Coin's development path for this eventuality!

"Australia leads the world in contactless payments, which have grown from almost zero three years ago to more than 35 million transactions a month and now account for 60 per cent of all MasterCard and Visa credit card transactions, according to Westpac."

http://www.theland.com.au/news/agriculture/agribusiness/gene...
I just invented something similar.

Though it only supports a maximum of 4 cards, at scale it would cost ~500x less.

I call it "penny." Here's my prototype: http://imgur.com/49auKC4

(reposted from https://news.ycombinator.com/item?id=6733584)
Exactly what I thought. Yet like most, most solutions to problems are non-obvious and counter-intuitive.
We pay less of a risk premium in the US. Some of these scams will drive that up.

Yup. Thanks to the scammers, even REI has limited their return policy:
http://seattletimes.com/html/businesstechnology/2021116265_r...
the one they're showing in the TFA video is not 1K. The motor, higher servo, blades, etc don't come for free.
Very useful. I run a feed for my city and this would help me enormously...
Very interesting!

I guess it specifically didn't turn up interesting patterns because
a) you correct for density
b) the distribution of primes is "noisy" (which is why they're so puzzling) and by averaging out the noise you get a fairly flat distribution
this is cool, though I'd wonder how it compares to Kyoto Cabinet. another big issue I've run into personally is the fact that both LevelDB and KC don't explicitly support multiple processes reading the db at once. (KC's API allows this but advises against it, LevelDB afaik doesn't even allow it.) I wonder if RocksDB gets past this.
Just enter your phone number. I don't carry rewards cards
There was never anything wrong with the table layout algorithm, what sucked was that there wasn't any way to apply it without typing your HTML rigidly to that structure. The situation still isn't perfect and flexbox is a strange alternative that I'm not quite happy with yet, but you can't deny that the HTML in my example represents the content you described with almost no extra layout fluff.
I have no confidence they will be able to support EMV cards. I'm sure they'd like to, but consider that Square hasn't managed to yet and their business / funding / engineering talent is considerably larger than Coin's. There are many, many regulatory issues involved with EMV.
When it comes down to it, having a few plastic cards is just not that big of an issue compared to the advantages of multiple, simple plastic cards.
The Crystal Language now compiles itself - Find out how
I use them for different rewards. If I'm out grocery shopping, I'd use the card that gives me 5% back on grocery purchases. Similar with flight purchases with a different card.
I think the lack of discourse is considered a feature by the lobste.rs community, as the easiest way to keep its signal/noise ratio high.
What Would Louis C.K. Say About Your Start-up?
Indeed, when the big powerful behemoths work to improve the world instead of stagnating and monopolizing it, great things can happen. This case is a great example where Google did something no startup would be able to get away with and fought a multi-year battle to make it work.

It's hardly the only example, though. IBM did hard work to defend Linux against Microsoft and SCO's attacks. Apple cracked the carriers' line against useful smartphones with unlimited data, 30% instead of 90% carrier cuts in app stores, and freedom from spyware and crapware; Jobs' sales pitch to AT&T was as big an innovation as any tech in the iPhone. Google fights for net neutrality, fair use, and free speech on the internet. All the big players were active in the effort to organize the users of the internet against SOPA, too.

But the big players can also be destructive. Smartphone patent wars are a danger and a disappointment. If the major players would turn their Washington efforts to our common best interests, we could have excluded software entirely from patent monopolies by now. It certainly would have saved them many billions to do the right thing. Instead they fight to a standstill in courts at great expense and leave startups endangered and exploited in their path.

So let's hope for more of this in the future and tip our hats to Google and Judge Chin this time.
Her quick dismissal of Mongo is unwarranted. For many datasets it works great.

Here's my question: are the (hundreds? thousands?) of production Mongo deploys wrong, or is Sarah wrong? Given her blog title it's gotta be one or the other.

I'm not using Mongo now, but I'm happy the site I created with it a few years back is still running strong. Once I got used to denormalizing the heck out of everything I had zero complaints. But it was for medical records: easily denormalized, mongo-friendly.

It did lead to this: https://github.com/bronson/valid (probably never get around to polishing it, alas...)
Welcome to HN, home of the shameless plug and the nearly mindless rants.
Well LevelDB is already good. And if this improves on it, that's great.

I was looking at embedded key value stores and also found -- HyperLevelDB (from creators of Hyperdex database). They also improved on LevelDB in respect to compaction and locking:

http://hyperdex.org/performance/leveldb/

So now I am curios how it would compare.

Another interesting case optimized for reads is LMDB. That is a small but very fast embedded database at sits at the core of OpenLDAP. That one has impressive benchmarks.

http://symas.com/mdb/microbench/

(Note: LMDB used to be called MDB, you might know it by that name).
Looking for guidance. Can we get some feedback on our Start-up? 
Thank you, in advance
This is really interesting! Crystal looks more promising each day.
How Promotion Affects Pageviews on the New York Times Website
> Why try to put a not even born yet business down if you are not even competing against it in the first place?

Because if we all just blindly praised every new business that came along and never gave them our true opinions we'd have a lot more bankruptcies than you have now (and that's saying something).

A large number of businesses fail because they have terrible ideas. If you think a business has a bad idea why shouldn't you be allowed to tell them that? Yes, there are businesses that succeed despite of everyone saying otherwise. Good for them - but they're the minority.
Also, https://walla.by/the-wallaby-card - they have been around even longer.
Former NBA Star Jamal Mashburn Launches Venture Capital Firm
If I max out the monthly rewards on one card, I can start building the rewards on the next.

Some people can't manage their spending with a credit card, some people can't believe that these companies are giving away all that free shit (even money in return) just by not paying cash. Depends on how they manage their finances.
What do you think the baby is breathing in the womb/birth canal?

(presumably you don't leave the baby in a plastic bag after it's out)
Well, if you lose your credit card, it's all right there and unencrypted, readable with any card reader. Any level of additional security is strictly an improvement, though granted this would be losing three credit cards at once.
It appears to be very comparable to vacuum extraction. In fact it allows the same ~40 lbs of pulling force. (http://www.odondevice.org/device.php)

However, the device looks a lot less likely to fail (let go) than vacuum extraction, due to the firmer grasp.
Actually directional antennas make no difference in regard to their allowed transmission power. The allowed power is specified as EIRP (Equivalent isotropically radiated power), which specifies the power a perfectly isotropic antenna emits. So if you increase the gain of your antenna, you have to decrease the amount of power you feed into your antenna to stay inside legal bounds (assuming of course you were at the maximum allowed transmission power to begin with).

What you do gain however is gain on the receive path (so you can hear the mobile phones better). Also the possibility to build segments and thus increase the usage of your frequency bands.
"Our tech stack shrinks as we age, fewer trendy languages and databases, your product should be cutting edge, not your tech"

I'm glad this was said. I find it hard to quell the excitement about new FOTM language/framework/database in our internal team and always wanting to use the hot new stuff that HN is raving about.
Pretty much exactly what I was going to post. Prophylactic use of antibiotics in hogs/whatever is stupidity in a class of its' own, selectively breeding organisms on an industrial scale for resistance to the drugs we might want to use to keep us alive.
> But it is also not vaporware.
Sorry if I wasn't clear,

Sorry for the confusion, I read that somehow as effect on Google's part to integrate the browser in Chrome in order to have an example of it running to speed up the approval process. I see how it was a total brain fart on my part. Disregard that one. I updated it with actually what I think I was saying.
And yet it's allowed me to call myself 'Bruce Wayne' ever since they started with this real-name crusade.

Honestly, the chilling effect worries me. I appreciate that a lot of people would rather just not deal with the like of Stormfront, and simply pretend to themselves that people like that do not exist, and that those views are not held, but this is a harmful way of dealing with anti-social views.

Even if we argue that a real-name policy would totally kill off all hateful comments, we have to consider if this is even a good thing; hateful comments should be met with rational arguments that undermine them, and show them to be incorrect. If someone says "all [people of some class] are evil", then one solution is to shame them into shutting up by linking their comment to their real name, but this just allows them to continue to think this way without ever hearing a dissenting opinion (I mean, they're hardly likely to bring this up in public, are they?).

The internet has a wonderful power to throw people of contrasting views together, and get them to show each other how they think, and allow them to change their minds. The mere fact that this process may sometimes result in offense isn't a good enough reason to stop it. If someone's views offend you, then it is your duty to prove them wrong and -- if you cannot do so -- consider that your own views might be incorrect.

I know I've personally debated with others online and learned from the experience, and I also know that I'd never have done so were it the case that I would have had my real name linked to the views I was espousing. It strikes me as incredibly harmful for society in general to attempt to silence offensive speech, not only because it means that those who hold offensive opinions can never be proven wrong, but also because it means that unpopular, yet true, opinions have no platform to be proven right.
Upworthy: The Sweet Science of Virality
No kidding. Credit card companies are going to love this device.
I agree their fab process is probably quite interesting!
Hospital rooms with built-in autoclaves would give horror movies a lot more material to work with...
The Google Glass Killer App
That sounds like an enormous headache. I am very glad to sacrifice 5% of my $10 000/yr grocery bill to not have that headache.

$500/yr to not have to listen to anyone telling me how I can save a few more cents? Priceless - no wait, not even priceless, only $500/yr!
Yes - very cool. Ah, the miracle of life and umbilical cords.

http://blog.al.com/smarter-every-day/2012/02/why_you_didnt_d...
- $625 Billion Market Value??? WOW!!!
>I think tho' it would be amazing if Dart could run on the server side as well.

It does but I think Go might be more fitting for that purpose.
Younited and Jottacloud? Come on my Scandinavian neighbors, those names are horrible.
The statement made upthread was that (a) github destroyed open source social structure and (b) has resulted in buggy releases when there are releases.

I would have liked to see some examples in such a broad statement. I am struggling to think of an O/S project I used pre-github that fits the bill.
This is the first high-spec handset with one of the new OSs. You can get Firefox OS on a fairly lo-spec device, and that's probably good for Mozilla's ability to mature their product, but this launch will determine if any of the new OSs can compete with iOS and Android on first tier OEMs' devices.
Among the good schools, are really horrible schools. You put your top 3 choices, and there is a good chance you wont get any of those choices and be placed in a bad school. You get expectations like 5 year olds being expected to take muni for 50 minutes one way.

This all has come from conversations with people who grew up in the bay area, so the 50 minutes on muni might be different now from their childhood, but the top 3 school choice thing came from a coworker today talking about their friend's experience with their kids.
Yahoo is auctioning off some amazing domain names
The AMEX, the one for places that don't take AMEX, the one with the high limit and the one for buying things in foreign currencies.
That's a given. As I've been railing for years on G+, at Web scale, Sturgeon's Law is six sigma compliant: 99.99966% of everything is crap.

G+ has a filter problem. Robert Scoble's been on them about this from the start. Clay Shirkey has also observed (in the general case) that it's not a data overload, but filter underload. Human information handling capacity is limited and we can only process so much.

My preferred mode of using G+ is through Notifications and Search. Both need much love, but they're vastly better than Streams and Communities.

All of which I've written on at length on G+.
Retraction for our 1863 editorial calling Gettysburg Address 'silly remarks'
For a contrasting perspective to the technology-centric, access-oriented view of "public benefits" that is typically dominant on HN, see the documentary "Google and the World Brain":

http://www.worldbrainthefilm.com/
Hacking Adwords: can you get more customers for $20 a day?
Fair enough. It's true that I have bias, my wealthier friends who give birth are 'over-educated and academic', and the understanding of a natural birth is a given, while ideally being as close as possible to a good hospital in case of complications. The time I've spent in developing countries, it's just anecdotal to me that a midwife is the first call for a pregnant woman rather than an obstetrician.
> End-users are provided with a clear and transparent installer behavior

Is the opt-in box pre-checked? If it is, then this justification is 100% Grade A Angus bullshit.

We have decades and decades of experience now showing that people don't read dialogs. They just click "Next" until they're through them. If you present a user with an "offer" whose opt-in is pre-checked, you are taking advantage of this behavior, full stop. You know that if someone they trusted was sitting next to them explaining what was about to happen if they checked that box, they would not check it. So you try to sneak it past them by opting them in by default and trusting that they won't notice.

And it works! You can fool a lot of people this way, if you want to. But just because something is effective doesn't mean that it's "clear" or "transparent." And deep down, if you're honest with yourself, you know that.
HyperDex?
First thanks for taking the time to write out your thoughts it is appreciated.

The classifying is a challenge. While doing it at the course level is a pain we think without doing this the value added is small. We have found the more courses are classified the easier it gets. This being said the edge cases can take a good deal of time to figure out and are frustrating.In the future we would need someone full time just to work on this.

As for "...is today's and tomorrow's problem, not just yesterday's"
This could be the case no doubt but some revolutions take longer than initial planned. HN readers might know about MOOCs, gamifying education with achievement badges, etc there are a lots of people who don't, almost surprisingly so. A few months ago we talked with a local prof who didn't know about MOOCs. Millions of people grew up with a traditional college courses and semesters and millions are take traditional college courses. We think that replicating (or near enough) the current setup is easier for people to grasp. There are others who think points/badges are the way to go.
.
We will have to read more about library sciences As as you point the as MOOCs become less like regular college courses the more our classification standard will be challenged.

I had seen edsurge before but now will have to follow it more closely.
It occurs to me that they would be better off building filthy old man bot so as to catch the producer side of the equation.
Which is exactly the same situation that Javascript is in now. The Javascript VM in Firefox has features that are not part of any web standard, nor part of a spec that has interest from multiple vendors.
> And the second half has nothing to do with Coin itself either, but is about Kickstarter charging in general.

Well, no, its about a company pretending to be doing normal product ordering but actually doing a do-it-yourself Kickstarter, and how they may fall afoul of various rules, like those of the credit cards they are accepting, in doing that.
Dead customers can't be returning customers?
Will they be making any price changes to previously free courses? If so, they should be careful because many people have been waiting to take some classes but have put it off for one reason or another. Having them comeback to realize it is paid now might cause several negative reactions.
something wrong with the 'reserved' prices?

PostgreSQL RDS micro instance falls to $0.009 per hour when reserved, while MySQL falls to $0.016 per Hour.

If it isn't a typo, Postgres reserved instances are 1/5 of the on-demand price, which doesn't seem correct.
Why haven't any researchers run a trial to compare the two and revolutionized this area of medicine after pronouncing dramatically better results for the traditional way?
API for Bike Sharing Networks around the world