skysight-inc/HackerNews huggingface dataset:
A regular light bulb converts about 2% of its energy input into light, and 98% into heat. For a 60W light bulb, about 1.25W is converted into light and 58.75W into heat [1]. It's incredibly inefficient, and the filament can reach temperatures of over 3000K. (Ever wonder why CCFL lamps have their colors expressed as temperatures like 2900K? That's the actual temperature of a filament with the same color.)

A 60W-equivalent LED lamp uses 6-8W of energy. Assuming it converts roughly the same amount of energy (1.25W) into light, the remaining 4.75-6.75W needs to be converted to heat. That's about as much thermal dissipation as a low-end laptop CPU, but concentrated in a much smaller area and with a much less effective cooling system (it doesn't even have a fan). 85 degrees sounds about right.

[Edit] Still, 85 degrees is nothing compared to the extreme temperatures that a filament in a regular light bulb experiences. It's only a problem because the LED chips aren't made of carbon or tungsten like filaments are.

[1] https://en.wikipedia.org/wiki/Incandescent_light_bulb#Effica...
The Promise and Perils of Equity Crowdfunding
It was the best option in both cases. He was in check when he took the queen, so the queens had to swap or black would lose his queen. At the end Anand traded his knight for the pawn as a king and knight (black's material) can't win, but a king and pawn (white's material) can, so it is in blacks best interest to swap.
This is what sdfjkl is intending I think. Have the TVs/Whatever on the other side so they can't scan your network shares to get the information to send back the HQ.

I would be much more effective, straightforward and ultimately more useful though, to firewall the TVs from the internet outbound so they can collect data all they like and never send it home.
Restless America: state-to-state migration in 2012
Really nice!, this should be the original article hehe, thanks for sharing!
Link: https://leanpub.com/php
I'd say you definitely need a stronger value proposition. I have no idea why I would need this for my app.

Communicate to visitors how it will help their website (e.g. increased ranking, indexing, etc.)
Oh my, if only apple wasn't around, folks would spend their days happily typing code in vim or emacs.
Some layout issues with Firefox for Android: https://www.dropbox.com/s/4q1svdsaqbqwkuc/Screenshot_2013-11...
20 years of CFEngine: design promises
Free (maybe) app for testing
Stumbled along this nifty looking site. No idea what it's for though...
Python, to me, is the all-around B+ language. It has good (but not great) performance, language semantics, runtime technical detail. As history showed us, being good at a lot of things enabled the growth of a large community (without corporate sponsorship) and an immense library ecosystem. So "all-around B+" isn't a knock against it. If anything, it's to be admired.

Unfortunately, this means that most data science findings, when transmuted into permanent production programs, don't stay in Python. Often Java or C++ are used instead.

Personally, that's why I think Clojure's got a real shot at being "the language of choice for data science" in 2023. It has the power of Lisp, it makes a lot of data-frame manipulations really easy, and because it sits on top of the JVM, it can be "productionized" pretty easily (you might have to write a couple functions in Java, for performance).
Actually that was meant to be a joke.
Is that really a reason to downvote?
Who said about code!

It says 0 lines of JS... Technically there is one line of JS!

technically
I'm still slightly uncomfortable with css being able to do anything more than positioning, coloring and fonts... and maybe hover selectors though I did abuse those severely when I found out about them.

Nevertheless, demos like this are pretty cool.
there's no such thing as a free lunch...
are you sure about that? the king could have moved back up, but in front.. moved from right side to left side between those two lines, without moving in front of the queen line.
60 minutes from last year. pretty cool stuff right here http://www.youtube.com/watch?v=Qc_v9mTfhC8
http://www.switchlightingco.com produces excellent (though expensive) LED lights which are, I'd say, 95% of what I could want out of a halogen replacement.
G Day Uganda 2013
McFail: McDonald’s debt advice to employees — return purchases, skip the takeout
Oxymoronic titles ftw!
My god those comments. Even chess streams are not safe it seems.
Won't happen imho.

Not in France, anyway. The farmers will eventually hit the streets and block all road traffic in "Opérations Escargot" until the thing gets repelled.
Also, regardless of what it says on the package, the light won't be as warm as that of a classical light bulb. For a cosy light, you need to get a classical bulb or halogen.
Another way to invest in Bitcoin when exchanges are not very liquid: accept BTC at the current rate and boost the value and awareness by making a bold move.
This is a typical example of how an Android fanboy advocates Google by insulting other people's taste and freedom.
As freely as cars on a freeway? I want better for my electrons.
Chess is very addictive and I think even if they were told to like chess they would. I know that we played chess sometimes in public grade school and having been encouraged to do so didn't prevent me from enjoying it. it eventually became quite difficult to pull me away :-)
Back in the day, the "Hall of Fame" for this kind of exploit would be a .txt file sent to full-disclosure, detailing the exploit and sending "greetz" to your "crew" (or if you were lucky, posted in a periodical of note like Phrack).

Now the fix comes out before anyone gets harmed by it, AND the person who discovered it gets PAID for it. Whoever thought up the rewards program is keeping people safe and still giving hackers a good reason to keep hacking. The future is amazing.
So is there a table of which manufacturers use thermistors?
what rule is that? are you implying even if only white king, black king, and black knight would be left on board, it would be a draw/win for white by default?

Instead of trying to isolate white king into a corner for checkmate?

Never heard of a rule like that. Are you sure?
Thanks. Our Firefox support isn't great at the moment. Also, we don't intend Ionic apps to be run in mobile browsers, but rather native UIWebView type shells. We are looking into support Firefox OS, though.
It's a light bulb.

A light bulb.

This isn't a car, which you expect to require some expertise. It's not a furnace that will be primarily handled by an HVAC specialist. It's a light bulb. Consumers have a reasonable expectation that devices like this Just Work. If the device fails to meet its promised service-level without a dozen asterisks in its usage? It's not meeting its intended purpose and it's defective.

Consumers should not have to meticulously research every small purchase. Simple, small purchases of replacement parts should not require reading a 10-page instruction manual of 6-point font, especially since you didn't get this manual until after you got the damned thing home.

By allowing manufacturers to sell these defective devices, we don't just hurt consumers, we hurt the environment with unnecessary waste of electronics, and we hurt the real, quality manufacturers who want to sell good stuff but can't because there's no way to tell consumers "all the other crap on the shelf will break in under two years and we won't" so they end up getting crushed by people who cut corners.
> (except when dimmed -- nothing can match the fireplace-like glow).

I can't talk specifics (under NDA from a former employer), but this is a problem for which solutions exist. I don't know that manufacturers think there's much of a market there, however.

> Which has made me wonder if this switch to LED is way more complex than just those two measurements :P

It is. There are a bajillion things going on. One which you've already noticed is how dimming impacts color temperature. CRI is also a huge issue. Then there's the optics - LEDs are very directional, so they require pretty advanced lenses in order to achieve a desired lighting pattern [1]. Optics impact all kinds of things, including color temperature, and since the development cost is high you can expect cheap brands to skimp there. If you're comparing them by looking directly at the bulb, internal glare/reflection is hard to match as well.

I'd still caution against using the A19s in a recessed fixture. It's not a safety issue (that I'm aware of), but you definitely won't get the rated life out of the bulb.

Out of curiosity, did you try an LED BR30? I think you might find one from a quality manufacturer to be a bit better than the A19.

1: $20 says the lighting pattern on the Sylvania LED is smoother/more regular than the Sylvania halogen, but I'm biased since I know the guy who designed the lens.
Man, I would hate to see that Google Doodle.
It looks like we're gonna need some innovations in light fixtures which have better heat flow/sinks.
Stanford Prof. Deresinski on Antimicrobial Stewardship Coursera Class
lot of trolls in the wild.. without mods.. god bless the mods :D
It gives a simple design enhancement for LED bulbs at the end of the article to fix the problem outlined. So I think not.
A Material Point Method For Snow Simulation
Billionaire develops mass water-heating system to warm the ocean in his backyard
How about not buying seeds that are encumbered like this? "Oh no, but I need my roundup!"

Buy organic and support the farmers who don't need weedkiller resistant crops.
Only semi-related, I must have $200 in loose change collected over the years (and years). What the hell to do with them?

Turns out I can take them to coinstar at the local Krogers and turn them into cash but they will take a chunk of the change that I am too miserly to part with.

OR, wow, I can turn them into an Amazon gift card! I mean, I can turn them into Home Depot cards (and many other cards), but I live in an apartment.

So that's awesome and I test it with $20 in quarters, AND, AND, AND,

Machine almost instantly jams.

No one uses the coinstar except for the most part as trash can so when the manager rips the machine apart we find safety pins, and buttons, and all sorts of crap.

Oh well.

Hey, the coinstar.com tells me Walmart has a machine too. Let's check that out and and and -- the walmart machines don't allow conversion to Amazon money. My guess is that Amazon is Walmarts biggest enemy.

Oh well. I now have about $180 of loose change.
We use it for the job queue that our distributed workers interface with.
When businesses actually price products or services in a digital currency as opposed to accepting it, we'll know it has arrived and is ready to rival national currencies.
Armenia requires chess in schools for at least two hours a week (http://www.theguardian.com/commentisfree/2012/feb/07/chess-d...) and they consistently are one of the top countries in the Chess Olympiad.
So we're going to ignore the German and EU patent battles that Apple has won against Samsung? Way to provide not only biased but willfully wrong information in order to support your argument
I'm attaining all of the goals of this library with MOAI right now, still going strong .. funny thing is, it does require platform competence, but if you get your own VM and frameworks going, suddenly everything is a target.
Why has nobody really disrupted the culture sector so far?
thecultutretrip.com aims to be the one-stop website where the global cultural community goes to for the world’s best on art, culture and travel. It has sections for every country in the world and aims to be the first truly global culture brand, with a focus on Asia and emerging markets. The site's global audience is growing very fast and the company has attracted interest from Microsoft and VCs in US, Israel, and UK. Get in touch if you want to be part of our project!
Or it reads like an advertisement for thermal management technology inside of LED light bulbs:

"Ed Rodriguez [the author]...formed OptoThermal Technologies to focus on thermal management technologies related to high-power LED lighting."

http://www.edn.com/user/ed%20ro
It's not that programming is extremely difficult, it's that many people are barely functional on a computer to begin with.
Why we look at job applicants' Github or 'What's your excuse?'
But we as devs do care.
That's sodium hexafluorosilicate (Na2SiF6). It's much less reactive than elemental fluorine.
Esa's satellite Swarm launch to map Earth's magnetism
short-term memory.
Thanks for the comment, the concept of nettlesomeness intrigues me.

"...Carlsen is demonstrating one of his most feared qualities, namely his “nettlesomeness,” to use a term coined for this purpose by Ken Regan. Using computer analysis, you can measure which players do the most to cause their opponents to make mistakes."

I was surprised to see that this isn't just some subjective measure but can me measured using computer analysis. In chess this can be a great tool against one's opponents but in collaborative endeavors it can be a detriment to team productivity. I wonder whether the same analysis can be used to pin-point nettlesome members of team e.g members of an open source team whose contributions sidetrack collaborators and cause them to make more trackable errors...
Combinations with insufficient material to checkmate are:

king versus king;
king and bishop versus king;
king and knight versus king;
king and bishop versus king and bishop with the bishops on the same colour.
- wikipedia
No need to do that, you can still use CFL and they are not being phased out.
Man, the quality of the videos on Lynda.com always impresses me. But I don't wanna pay $25 when that's the only series I want. Wish I could just do a la carte.
<blasphemy alert> Does anyone know some good alternatives to chess, as a game that mixes deep thought and aesthetic variety? I tried Go, but found it somewhat boring compared to chess, because of its uniformity (which, on the other hand, has the advantage of beautiful simplicity and symmetry.)
On another note: it is unfortunate, in my opinion, that chess has a special standing among board games. I would love to see some more variety in world-class intellectual matches, similar to what exists in physical sports. Something like a "board game Olympics".

Edit: Thank you for all the useful replies! In reply to some of you, I am a complete beginner at Go. Maybe the word 'boring' was not carefully chosen. As a programmer, I should have known better - that things may seem boring (tiresome?) until you become more fluent with them. I should certainly give Go another shot...
Arguably, it is because the lack of browser support that makes WebRTC "not matter for everyday use". We would see a lot more use if IE and Safari would implement it. And not only for video conferencing (such as https://appear.in), but also for multiplayer gaming, filesharing, audio recording+++
This analysis linking the richest address to Silkroad’s DPR is interesting: https://bitcointalk.org/index.php?topic=310600.0
Yes, this isn't reddit.
This kind of thing ought to be splendid on FirefoxOS, but the examples are disappointing at the moment.

For instance, it doesn't seem to be possible to interact with the side-menus example at all; and in the nav bars and tabs example, after tapping on the cat link, I could find no way to go back again (apart from through the browser back button, which wouldn't be present in an app view).

(This is with FirefoxOS 1.2, which runs things like the Twitter mobile HTML app quite well. Worth testing if you can get access to a FirefoxOS device, it'd be great to see this working well on it.)
I have dozens of Cree-brand LED bulbs in my home (they're the uber-cheap brand Home Depot carries, yet always very favorably reviewed). Their packaging carries no warnings against use in totally enclosed fixtures, and I have several in such fixtures in bathrooms. They also come with a 10-year full replacement warranty. Some are now about two years old, and none of their bulbs have failed or even become too hot to touch.

I have a feeling this guy's overstating the problem. Perhaps because he's in the business of patenting thermal protection designs for bulb manufacturers.
And he would have lost his queen thus loosing the game.
Not before coding EVERYTHING in 30 lines of JS or less!
Should have explained. Some people find some tasks come natural to them so they think they are inherently easy for everyone. while others find other tasks come naturally to them. Humans are different. Music is more or less impossible for me. I am sure programming is impossible for someone else. Math is logical and easy to me. I used to tutor my friends after school on the homework that was assigned thinking "how us this not not completely straightforward to you, this is simple." yet they thought things I couldn't grasp were simple.

Lets not ignore differences in humans and say programming is easy because it isn't to a large number of people.

http://arstechnica.com/information-technology/2012/09/is-it-...
That's clearly not an amazon though. She has both... uh, mazzes.
I signed up and got sent out a code to download the app from the app store.
Interesting you should mention that tendency to "broadcast", because Monsanto engineered their seeds to not do that (see: the "terminator gene") but did not put it into production because of the huge backlash it caused.
I'd appreciate some examples of tools that make programming "easy". Easier than assembler? OK, check. Easy in general? I want that.
>Performance obsessed

>zero jQuery

Perhaps I've not been keeping up with the latest JavaScript news but is jQuery considered slow? jQuery 2 is a lot lighter and works well on mobiles.
Interesting article. I'm sort of here now with something I'm working on, its incredibly general, and thats how I want it.

What I'm going to do however is pitch to the specific groups, the specific uses. I'm going to get out and talk the moms and pops crowd, the artsy crowd, the cyclist crowd and show them how/why they should be using it.

Maybe I've read it wrong, but it doesn't seem like a product/market fit problem to me, it seems like a "I haven't showed these people sufficiently how/why to use it for what matters to them" problem.

Edit: Rereading what I've wrote back I feel even more certain of something: perhaps the problem with creating a product that is too generic is that the gap has to be filled with education, if it isn't obvious on how to use it - like the case might be with a product that is very specific - then you have to fill that with a non-codey layer over the top.

Double edit: I think its funny how I see people write about "coder mindset" as a reason that they've hit a snag but yet still manage to stick to a coder-solution mindset. Maybe try a new layer of packaging, some education. Literally detach from being a programmer. Source: Programmer, marketeer, photoshopper background
A Cache, Session Store, Message Queue (RedisMQ), Distributed Pub/Sub Messaging, Locking (i.e. between AppServers), Rate Limiting, Analytics, Timings, etc.

Basically a swiss-army knife that you don't want to be without when developing high performance systems.
Aw christ, no.

I hope this dies quickly, or at least isn't as horrifying as Facebook credits.

See, I worked at a Facebook game company when the Facebook credit thing came online and it was universally a bad deal for game devs. It was Yet Another Payment Chain to implement, a weird checkout flow (we had an off-site version of the same game which could use PayPal, but not FB credits, whereas on the Facebook version of the game, you could use FB credits, but not PayPal, etc), and credits were actually worth way less than actual cash and you never knew how much less until way later.

See, Facebook offered similar incentives as Amazon here: free promotional Facebook credits to get people using the system, bonus credits for larger orders, etc. However, those credits were marked as "promotional" internally, and if you accepted promotionial FB credits, you didn't get any money. That's right, the game devs ate the cost of promoting FB credits. Plus, you had no idea if you were accepting promotional FB credits or real ones, or if certain big companies got a sweeter deal on getting a higher real/promotional balance, AND you didn't know how many of your credits were real or promotional until the balance report came in, making it kind of difficult to identify just how much money you'd actually earned.

Now maybe Amazon will eat their promotional costs themselves here, but to any dev considering implementing this, be wary, and read everything. I know that's standard advice, obviously, but it should be especially so with your cashflow, and I'm personally wary as fuck about this, given just how similar to FB credits it appears.
iPhone Privacy Settings Missing From Apple's Support Docs
New species are created all the time, such as though cross-breeding.
I sure hope those guys are keeping their keys safe.

Also - there's 4 addresses with almost exactly the same number of coins (40000) who all last transacted on april 9. Surely connected.

Also also: why do so many btc balances end with ".0411"?
There's already something very similar to a "board game Olympics", it's called the Mind Sports Olympiad: http://www.boardability.com/games.php

I'd give Go another try. If you're interested in watching anime, I found the series _Hikaru no Go_ pretty good motivation to keep learning.
Food has always been "free" in the sense that anyone could produce or harvest it, as long as they had the resources.

This is part of a two part process to steal the freedom of food from humanity: 1) produce these technically unique and patented seeds, 2) wait for those seeds to crowd out unencumbered seeds. Once there are essentially only patented seeds, Monsanto et al. become our new overlords.

This will probably happen with GM animals too.

The ultimate in rent seeking. https://en.wikipedia.org/wiki/Rent_seeking
I have this link handy when I want to get a very quick and general idea about all the different ones:

http://kkovacs.eu/cassandra-vs-mongodb-vs-couchdb-vs-redis
The incandescents in my kitchen change brightness every time the microwave turn on. I can live with it.

(It's old knob & tube wiring. Electricians claim it's safe)
>I am not so sure. Usually it isn't the entire team that gets fired, it's the project manager. The company still acknowledges the knowledge and value locked up in the engineer, and if he did his job, but the project manager / whomever made the wrong choices, the engineer is pretty safe.

If the project fails, well, seeing to it that the project doesn't fail is the manager's job, so yeah, if the project fails, the manager is more likely to get fired than an Engineer, especially if other managers think that the project failed due to poor management.

However, if the engineer fails, it is the manager's job to fire the Engineer in question, before the Engineer's failure turns into a project failure.

So either way, yeah, if you are perceived to have failed at your job, you are likely to get fired. The manager has a different job than the engineer, and thus is likely to get fired in different situations.

But I don't think that managers have less job security than Engineers. In fact, I think Managers face rather less systemic risk in terms of technology changes than Engineers do. For instance, when UNIX beat mainframes? There were a lot of SysAdmins who had to scramble for serious retraining or to make the jump to management.
Wow! I actually liked this article. Taught me something I don't know, made a nice factual argument without using hyperbole.

A great example of the kind of article we should see more of on HN.
So some of these guys who jumped from 20,000 to 80,000 bitcoins virtually overnight -- is it safe to assume that they are hackers in Russia? It would be interesting to see an overlay of known bitcoin exchange hacks.

For example: http://bitcoinrichlist.com/address/17UUsmejDsjJEtbRcotd289AD...
doesn't the fbi haul belong on at the top of this list?

https://blockchain.info/address/1FfmbHfnpaZjKFvyi1okTjJJusN4...