skysight-inc/HackerNews huggingface dataset:
>I don't understand though - why the fingerprint?

Disney first started using the biometric turnstiles about 10 years back to stop people from sharing season passes, and then a few years later they added it for plain old multi-day tickets.

It used to be that there were folks lingering in every Denny's and IHOP parking lot on International Drive in Orlando, buying and selling partially used multi-day theme park tickets. The marginal price increase for adding an additional day drops quite a bit for every day you add to a ticket - so you could have bought a 10 day ticket for not all that much more than a 5-day, used half, and sold the rest to someone else.

The fingerprint scan is done so that the ticket is biometrically locked to the person who first uses them, thus killing that secondary market for partially used tickets.
It's so you can't share a multi-day pass.

They don't really care who you are. They do care that one multi day pass stays with one person. Making sure the same thumbprint is used every time the pass is used accomplishes that; somehow registering ID might, too (but then they need to either print it on the pass, or have a database of pass serial # to ID, in parallel with their fingerprint database).

An interesting option might be to do ID one day, thumbprint the next. But I guess they're smart enough to require the choice on the first use, and then not allow it to be changed.
Although I love this stuff, encountering code like this is a nightmare.

I hope you never have to revisit your programs ;)
Depends. Does it make it cleaner, faster, and more readable? Go for it. Does it just use syntactic sugar to cram stuff into one line? Don't do it.
Great to see this. It reminds me of the original toy.

If I had the time/inclination, a kickstarter based on the original toy that rendered on paper and screen might be an interesting plaything.

Another future angle could clearly involve 3d-printing of the disks.

Good stuff.
Interestingly, the USB 3.0 xHCI Specification uses the scheme you mention for circular queues shared between software and hardware.

4.9 TRB Ring:
http://www.intel.com/content/www/us/en/io/universal-serial-b...
Great Scientist ≠ Good at Math
Out of curiosity, why does the trunk have a particular legal status?
Thoughtbot: Using rbenv to manage rubies and gems
Like it, photography is an area underserved with new interesting ideas. There's a world of people who take more than Instagram pics, and this seems aimed at that demographic.

One problem though: since you're aiming at photography enthusiasts, you'll want a proper integration with Aperture by a plugin or something. The way it works using the uploader (taking the cached previews) is clunky and not granular enough.
It's not that curious. People make typos from time to time on the internet.
Patents are antithetical to the core principle of software re-use
Curious, but why would Target care too much if the credit card was stolen? My understanding (which could be wrong) was the credit card companies or end users absorb the losses (depending on circumstances).
Facebook introduces Gifts
A crowd-sourced scholarship fund would be a great addition to programs like Hacker School. If Hacker School themselves handle giving out funds to participants who have a financial need, a lot more people would benefit, even those who don't have a social media presence or can't get to the HN front page.
Yes, its' not working in Chrome for linux ( 27.0.1453.12 dev), check it in Windows
Litecoin is a great addition to cryptocurrency as well, so look at both. Litecoin is the silver to Bitcoins gold.
I played around with something similar in order to create a camera setup for WebGL/Three.js and the Occulus Rift: http://sxp.me/rift/ This was created before my Rift was delivered so I used cross-eyed 3D rather than the proper 3D the Rift uses. The camera setup is general enough that it can probably be applied to any Three.js scene that allows offscreen rendering.
Hey! You can use the GitHub "explore" feature. Here is the link specifically for Java

https://github.com/languages/Java
Summary: San Francisco is terrible but, hey, you can get paid a lot without trying very hard! Of course, you aren't likely to save any money.
> A bad food is something that doesn't satiate you as it gives you calories and fat, so you need to do other work to force yourself to not overeat. Example: twinkies

OK, this is a reasonable first step. My point, really, is that even 'bad' foods can be part of a healthy diet, because health is determined by the overall diet.

Demonizing food leads to unhealthy psychological results in the form of the sin-guilt-redemption cycle, when what you really need to lose weight is a clear-headed appraisal of your current state and what you're capable of doing to reach your goal.
For giggles, take a look at the flow chart for getting a building permit in SF, compared to Austin.

Check out the average times, etc.

Try to imagine for a second how much easier and less expensive it is to deal with Austin than SF.
Tutorial on writing a simple JIT compiler
The liability for the card holder is limited by law to something like $50. Whether the credit card company eats the loss or wether the merchant gives them the money back depends I believe on how much information the merchant collected about the transaction. My impression is that usually the merchant eats the loss.
How can you be sure the government doesn't have a deal with the hotel you stayed at to have the maids lift fingerprints and DNA samples from your room?

Edit: /s
You would think so but no. Visa etc and the banks don't want that kind of trouble. To charge cards you need a special bank account called a merchant account.

A condition of this merchant account is that if someone issues a charge-back on their creditcard, if the merchant can't prove that the card owner brought the service/product then the funds are taken directly form their merchant account by the bank and then given back to the card-holder.

This is why anti-fraud systems are so important to merchants.

Case: I steal your creditcard, I buy a tv worth $10, 000.
You notice this, and chargeback the merchant.
The merchant has to pay you $10, 000 and he lost teh cost price of the tv he sold me (say $7, 000).

So by accepting your stolen card as payment, the merchant just lost $17, 000!

Source: I build payment gateways.
The problem with Dell is they change part numbers so fast that a particular part number replacement not be available, you then run not well trained techs trying to figure out which newer part number actually works and is equivalent on your model.

Last year I purchased three XPS 17 laptops within 3 months of each other for a client. Each time I had to choose slightly different options as they didn't offer the exact same configuration each time.
IE10 shows a pear. It became standards complaint or what?
Toastmaster's Speech Timer for Android
haha ironically left-arrow right-arrow replace space-bar scroll.
This is brilliant. iTunes killed hierarchical organization for music, but we've still been stuck with it for photos (albums = folders). This could get rid of "albums" as we know them.
Photojournalist Decides To Change The World, One Condom At A Time.
Why would google want to deal with the kabillion regulations that exist here.

"Sorry, we'll bring fiber to your area just as soon as we get through the 46 meetings necessary to remove this heritage tree blocking the way"

Imagine the red tape involved in doing anything in MTV or SF or the bay area.

The cynical old man in you consider just how over-regulated the area really is. California requires lighting and wattage density calculations to place lighting in a building. This part is actually not so uncommon, since IECC has some requirements.

However, compare:

http://www.lightingcontrols.com/support/statecodes/excerpts/...

with

http://www.lightingcontrols.com/support/statecodes/excerpts/...

Note: Texas just follows IECC (so for example, you will find it the same for NJ, MD, VA, TX, etc), while california has gone off on their own.

I'm actually all for permitting and code inspection, but a lot of the crap you deal with in SF and MTV is truly crazy.
When I drag the window, it flickers both.
Since this is turning into a recommendation thread, I'll add Jim Wendler's 5/3/1: httup://www.t-nation.com/free_online_article/sports_body_training_performance/how_to_build_pure_strength
You can buy the ebook and I'd recommend it, but you can also find essentially all the details online. A very similar philosophy of big-lifts basics, constant incremental progression, etc.
.split("/n").join(";")
Ask HN: Why does HN not use similar algorithm for comments as submissions? 
HN's algorithm for ranking submissions is as effective of any I've seen for UGC websites, but comment ranking seems very heavily weighted to first submitted.

Perhaps HN does this already and time is just less of a factor than for submissions?
The the image consists of a checkerboard-style pattern of pixels. The "dark" pixels form the apple image, while the "light" ones show the pear. The answer to the SO question suggests that the gamma correction information (which is used by Chrome and FF, but not by older IE) makes the image darker, blacking out the apple and revealing the pear. Without gamma correction, the apple is visible, and the pear becomes a light-colored ghost.

edit: I put together the pieces! yay! :D
who markets marketers? marketer marketers market marketers. stack overflow.
Disney also uses facial recognition:

http://www.wired.com/geekmom/2012/02/geeking-out-with-the-di...
The #1 most important factor in coding is:

Will I be able to read my code tomorrow or next week and know what in the heck I did?
I haven't played around with it, but how did it get to be a mess? As I recall it has historically been for NumPy.
Reminds me of KOOLEFANT, by Magnus Bodin:

http://x42.com/koolefant/

This goes back to the late 1990s; the page mentions MSIE for Solaris.
Ahem. This is 10-15x the money portion of tenure. You still have to think about advertising all day every day. I'd take the tenure.
Soso - We make creating websites fun again.
You might be interested in this spot: https://careers.mozilla.org/en-US/position/opLgXfw7
Interesting that Chrome (on OS X) displays a pear. I was under the impression Chrome used Core Graphics which would have exhibited this behaviour too?

Maybe not.
By "large swaths" do you mean "a few brand-new buildings"? Because that's the only place I've ever heard of Fios being available.
By accepted online transaction systems I assume you mean visa, paypal, dwolla, etc.

In that case two points
1) If you are willing to accepted centralized systems , than my second citation gets you complete anonymity.

2) At least with those systems, your information isn't public to everyone.
Don't misunderstand this as an endorsement of jerky trademark enforcement.

My point was that they did the work to associate "pin" with this concept in the public mind. Of course they don't own the word. That's just stupid. When people do these homages or clones, they are gaining traction and influence by riding on the work they did. Enforcement? Who cares... it's just unoriginal, cheap and lazy to trade on the name.
> [Unlike barbells,] Dumbbells are a body-building tool, not a strength building one.

Can you explain further? Clearly, barbells are easier to lift (see e.g. Effects of body position and loading modality on muscle activity and strength in shoulder presses), probably because they activate less muscles, but you seem to suggest that there's evidence that lifting barbells will also make you gain strength faster than when lifting dumbbells?

My guess would be that replacing dumbbells with barbells is bad for the same reason that you say using press machines is bad.
comment ranking seems very heavily weighted to first submitted

Comment rating used to be much weighted to first submitted, implicitly, because later submitted comments almost never got enough karma to move into visibility. Something was done to the comment karma algorithm in the last year or two to make recency LESS weighted than before, and I think it has improved the quality of comments in many threads.
Ask HN: renting colo space?
Hi HNers,

I bought some datacenter servers to learn more about virtualization and cloud computing. Sadly, I live in an apartment and it is unreasonable to host the servers here (noise, lack of static IPs, limited amps). I'm not making any money with the servers so paying for colo space is hard (the cheapest 1/4 rack rental I found costs $400 a month). Any suggestions for a cheaper solution?

Thanks!
As a very longtime Flickr user, I much welcome a quality Flickr replacement for those of us that want off site storage coupled with the ability to share with specific others in an easy manner.
That worked amazingly well. (I've had it happen to me accidentally before when looking at a tiled ceiling or floor.)

As amazing as it is, I hope it doesn't spread, because hours spent staring at movies or games like this would be disastrous to kids' developing eyes and visual systems.
Chrome uses Skia instead of CoreGraphics according to this: http://paulirish.com/2013/webkit-for-developers#webkit-commo...
there is math, and then there is math. In Russia they have a saying "beat a rabbit long enough and it will eventually learn to take derivatives, but integrals are another matter". For many people areas involving spatial reasoning like college physics for engineers is that "another matter", while (simple) integrals are still no biggie.

As for the original article, the implication that somebody having trouble with basic algebra can be "great scientist" sounds dubious to say the least. Like I said, there is math, and then there is math... there is stuff that anybody claiming any meaningful level of intelligence should be able to handle.
At the level being discussed here, I don't think it's a question of avoiding struggle, but rather of ensuring your family's wealth for generations to come. It would be difficult to turn down such an offer, especially if the work would still be interesting.
I haven't tried this, but I was told a few years back by someone involved in the design of the passes that you can use the multi-day pass of a different person in your party. Disney recognized that in a large family people might mix up the passes, so all the passes issued as part of a transaction are interchangeable.
On my Retina monitor (Firefox Nightly), I see a pear but also the apple, though very faintly. Saving to the desktop gets me an apple, as expected.
In America, police only have to show 'reasonable suspicion' rather than probable cause to search a person and his immediate surroundings for weapons - and if they find something else that's illegal while searching for 'weapons', you're out of luck.

Since the trunk is out of reach of the driver, it can't be part of this 'reasonable suspicion' search - unlike, say, the glove compartment. For the trunk, police need your voluntary consent or probable cause.

In other words, keep your contraband out of reach.
I'd treat this more as his personal experience with starting instead of a definitive guide to the subject.

If it's supposed to be taken that way, it should be written that way. Instead, someone with a little bit of personal experience about a subject wrote a soup-to-nuts guide for beginners that strikes an authoritative tone, acknowledges no other authorities, implies a great deal of expertise (even implying that the information he presents is derived from scientific studies,) gives advice that is extremely incomplete and in places off the wall, and refers entirely to his own work with NO suggestion that readers should seek out any other source of information. That's not normal. It's bizarre. Our jaws should be dropping at the inappropriateness of it. If it feels normal to people, I can only surmise that it is due to a distortion of culture where pumping yourself up as an expert (and "monetizing your blog") is not something that can be accurate or inaccurate, or honest or dishonest, but is simply assumed as the socially normal way to communicate.
I can honestly say TI calculator programming was my first foray into programming as well (I'm 25 now). I remember meticulously typing in a BASIC clone of Pac-man and having it not work the first few times I typed it in (I think it would take me nearly an hour each try). I didn't really program much after I stopped using TI calculators a lot until someone showed me tryruby.org and I found it interesting. Now, two years later, I work full-time as a programmer and have decided this will be my career. Funny how those little side diversions when you were but a kid can come back in a big way.
My manager once asked me to finish out a statistical problem to better analyze the results I was getting from my code changes that were intended to speed up an API. I looked at the whiteboard for about 5 seconds and grinned: "Who needs math? That's what computers are for!" Then I went to lunch.

Of course I went back and finished the analysis after lunch.
using ff on a nexus 7 I see the apple and a very faint pear.
Here is what I did -

* opened website;
* understood nothing;
* closed website.
sorry for being pedantic, but should'nt it be "\n" ?
I think the implicit question is not "why aren't Soviet-era military jets competing with modern cargo planes?", it's "why isn't a modern version of this competing with modern cargo planes?". (The former is just comparing 1970s apples to 2010s oranges.) In this context, it's reasonable to assume a landing gear and modern engines.

Re: the Antonov, I think the idea is that it needs to be very low to utilize ground effect, and the only way to do this safely is over water with a hull capable of emergency water landings at the very least.
What do you suggest for someone that wants to be efficient and effective at home, without assistance, and without lots of equipment?
What exactly did Ars Technica contribute to this discussion? It looks like a copy-paste job.
Chrome for Mac used to use CoreGraphics, but it switched to Skia because Skia was a lot faster at drawing stuff. (It still uses CoreText for rasterizing fonts, and Cocoa for drawing buttons.)
Can we stop saying "unit test"?
I just watched one of the trains labeled "Northern train to unknown" derail and run across Bloombury neighborhoods without need of rails until it ground to a halt and vanished.

I have to wonder if Harry Potter was on that train....
I love the persistence you have! Really made me smile.
I think you can be reassured that the only better way is to place people in hard vacuum, which most would assume too risky. A bit of our knowledge was gathered the traditional industrial way (via reporting on people getting hurt), but it looks like the animal testing was likely timely and informed the risks at stake.

I wondered just how many dogs were involved, and I found the following link:
http://triscience.com/Animals/Muscle/experimental-animal-dec...
It notes the test group was 125, with tests done in groups of 6. My impression is that their experience wasn't a waste, and was a benchmark study for decades.

While trying to find the original study, I stumbled across another that goes into some further detail.
http://cousin.pascal1.free.fr/AVMA%20etude%20decom.pdf
I don't have the constitution to read much medical research, but the impression is that the experience is markedly short. Physiologically decompression is pretty awful, but the subject doesn't suffer consciously. Hopefully that's a bit reassuring that the animals did not experience any horror film-like agony before blacking out (though it would be uncomfortable, to be sure).
At first I thought this was going to be some sort of flash game, That was incredible.

My main thought is the amount of stuff the astronauts had to deal with while the moon is looking mighty big in the windows.

It appears to be the very definition of a high stress environment.
"Beyond all this, there’s the challenge of reconciling these income data with other things we’ve been hearing about economic trends. For example, I recently read somewhere that Americans are three times richer than they were a few decades ago […] a quick web search indeed shows something like a doubling of inflation-adjusted GDP since 1970."

I’m no statistician, but I do know that GDP is at best only loosely correlated with “wealth,” and it sure as heck doesn’t say anything about where that wealth — or even the activity that it actually is a measure of — is increasing.
Math isn't that hard to learn, it's just that it requires lot of tutoring and lot of thinking. The reason why people today don't possess that much mathematical knowledge is that they don't maintain their knowledge of mathematics. So, when it comes to learning calculus or other advanced mathematics, you have a swiss cheese foundation. That swiss cheese foundation simply means you didn't mastered the previous required materials. So it's hard to learn.

I did the really elementary to high school materials in the past two years on and off. Math concepts didn't really get harder to learn. They're easy or hard to learn at time, but there's no difficulty ramp to speak of. Then what happens afterward is that you start forgetting about how to do things like logarithmic operation, how to simplify trig identities, and so on after a week or two, or sometime days. So you need to continuously review them everyday or do enough real world problems that you know how to do them for life.

The skills and knowledge that we master requires daily maintenance, or otherwise you lose your ability to do them. It's just like fitness. A person who stop long distance running for a while will no longer be able to run as long.
I just used the first slash I could find on the iPhone keyboard. You're right.
Precisely. The statement is, "In both cases, there is _an_ elite which has absolutely no problems...". It is not, "In both cases, the elite have absolutely no problems...".
My first thought was Apple or Google is going to buy this. Love the UI, but nobody is going to pay a subscription fee for it (and I doubt that is the business plan anyway).
Ask HN:Why do teenagers use kik/whatsApp over Facebook chat?
Not sure if this applies to you but I had to refresh the page before I realized the first slide is just blank and images appear on successive slides.
there is math, and then there is math. In Russia they have a saying "beat a rabbit long enough and it will eventually learn to take derivatives, but integrals are another matter".

A rabbit will be woefully unprepared to learn integrals if it forgot derivatives before it starts learning integral.
Unit testing with Node.js
I think he meant that sarcastically.
Is there reason to believe that successful executives are not like successful traders, in that they behave better than chance?

That is, if you make 10,000 people executives and make them make decisions by flipping coins, won't 100 of them be in the top 1% even if success is the result of successive chance outcomes?
Hehehehe, this is what my advisor thinks :) But honestly, right now, it just feels so good to reject the idea that a doctorate is everything. I've been in school for 12 years!
Aren't you double-counting here? On net the merchant only loses the merchandise. The net debit to the merchant's account is zero.
Feedback:

0. Why is it a great platform?

1. What kind of websites can I make? Highly dynamic sites? Static pages?

2. Any info about what is happening with the email addresses? I have no incentive for giving you my email because you have not offered me anything of value.

I looked at the page, it meant nothing.

It is as if you walked into a board room for a sales meeting saying "Hey! Look at me!" and then said nothing and left everyone in awkward silence.
We now have the technology to make this happen live, in color and high definition with a full view of the craft and the moon. Can't wait!
E.O. Wilson did an excellent TED talk on this exact subject called "Advice to young scientists". I'd recommend watching it as it's one of my favorite talks.

http://www.ted.com/talks/e_o_wilson_advice_to_young_scientis...