skysight-inc/HackerNews huggingface dataset:
How much do you pay for electricity?

Over 10 years, the difference probably makes this cheaper, even with such a small difference.

2.5 Watts, 6 hours/day, 300 days/year, 10 years, 0.13 USD/kWh [2]

=> 7.2 USD saved in electricity [1]

Count in the replacement CFL prices, 3 USD vs 13 USD, and the costs are pretty much equal.

Point being: Electricity is the biggest cost.

[1] right?: https://www.google.com/search?q=2.5*6*300*10*0.16%2F1000

[2] from here: http://www.bls.gov/ro9/cpilosa_energy.htm
I'd be surprised if it were otherwise. The company only makes its money from selling "new" stock. The 8 and 16 cent prices are what people are paying each other for "used" stock, and the company doesn't see a penny from those "used" stock trades.
I'm living in Korea right now and I'm fascinated as to how and why Woz decided to reply to this Korean high school student's email, of all the emails he could've replied to, and how often he does this for people. So random but so awesome.

And what an amazing and thoughtful reply it was, especially considering how lately Woz has become known more for being a loose cannon criticizing Apple in the press, than for his (amazing) previous accomplishments. Not to mention his portrayal in Steve Jobs' biography was less than glowing.
When I read the 'science of man' and/or 'natural rights' accounts of political society and morality, I am struck my how astute Kant's critique was--that what we call conventional morality can't be found in anthropological conjecture.

But outside of the question of morality, his accounts of political society rest heavily on Enlightenment doctrine--it's basically a tale of the passions. That was the Enlightenment, not so much the rehashed civic humanism/republicanism playing itself out on the streets of Paris. And as for his infamous maxim "Argue as much as you like, but obey" and his specific engagement with questions about what the Enlightenment meant, I would say this is pretty much the mainstream of Enlightenment thought. Sure, sovereignty might lay with the nation, but to emphasize the will of the nation, rather than its legitimate representation, is something fairly unique to Rousseau and the hard-core of the Jacobins.

I know there is a body of scholarship that pins the end of the Enlightenment to Kant, but I'm not familiar with it. Could I have the elevator version?

Edit: Perhaps I've overstepped the mark here. I'd be interested in any recommendations that link Enlightenment to a positive discussion of virtue--ie. not a discussion of Enlightenment and 'why virtue is no longer required [compared to the classical republican polities]'.
Probably that their chat-system lacked a method of banning people.
Why not just sign the file with GPG or openssl or something?

If you need to deal with clients that aren't aware of the mechanism, you could just put the GPG signature in a custom HTTP header.

If you need to use cloud hosting or the like, and you can't return custom headers, just put the signature in a file with the same name with .sig attached. In fact, I just downloaded a kernel tarball the other day, and kernel.org does exactly this [1].

I also found a few related articles and RFC's [2] [3] [4].

[1] https://www.kernel.org/pub/linux/kernel/v3.x/

[2] http://en.wikipedia.org/wiki/Magnet_link

[3] http://www.ietf.org/rfc/rfc3230.txt

[4] http://www.ietf.org/rfc/rfc6249.txt
I have been sort of an outsider on this bitcoin investing, but I know about the service.

Do you really think bitcoin is going to continue increasing in value? It seems to me like people are almost exclusively buying bitcoin as an investment. Very few people buy it to spend it. Doesn't that mean that as soon as people lose a bit of confidence, which is likely to happen some point, the price will completely dump? I am sure this has been talked about a lot - is there a better argument one way?
Microsoft: We Will Continue Our Scroogled Campaign “As Long As..
I like the Philips L-Prize 10W 900L better.

It's $15 when it's on sale.
I've looked it up on Wikipedia, but I'm not sure I understand what you mean. These austerity measures would mean that the US increases taxes when people start using Bitcoin, to counter the laundering or something?
So... lets say we have this guy, lets call him "Mr. Shark".

Mr. Shark notices that MtGox only has 107159 BTC trading volume. When converted into USD, that is about $5 Million. So... Mr. Shark learns that he can control the market price in any direction, with approximately only $5 million USD of investment.

Mr. Shark's strategy therefore, is to build up enough money to "spook" the market by controlling it for a full day. ~100,000 BTC would be enough to crash the market for a full day: and hopefully the spooked long investors will help create the crash afterwards. Mr. Shark would then make sure the majority of his bet is in the form of a Long Straddle. Mr. Shark rides the market up till BTC has hit some absurdly high value, maybe issue a press release or two to help fuel BTC's rise.

One day, Mr. Shark sells 100,000 BTC all at once on the Mt. Gox market. He cashes in at BTC's high price, then BTC crashes. (EDIT: For clarification... Mr. Shark loses some money here, on purpose).

Mr. Shark then cashes in on his Call Options portion of his Long Straddle, and makes money because the market went down.

Long story short: Mr. Shark wins a ton of money, and everyone who has "invested" into BTC these past few weeks loses their money to Mr. Shark. Mr. Shark leaves the market without any worries that investigators will be after him. (Its not like there is a Bitcoin version of the FTC)

Until Mt. Gox's volume gets high enough to resist an adversarial trader, or until there is some group in charge to make sure that blatantly adversarial trading doesn't happen on the Bitcoin market... the BTC currency will be too risky for me.
It seems like the interaction required by the two engineers could have been scripted to remove the human element. Was there a reason you chose not to do this?
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I think my favorite part of every Woz letter and email is how he signs his name upside down. There's not much more endearing than the playfulness and wonder that somehow conveys.
>you can't legitimately argue that it doesn't exist

I can! I said:

>well-produced content from a variety of perspectives that seeks to measurably increase understanding

I would argue that lots of the quality stuff out there is designed for consumption by an audience that's already really smart and well-informed, and doesn't increase what we can call "net understanding" by the whole of society.

What about targeting people who aren't already well informed? Fox News is great at this, only their goal is to help the Republican Party. What if someone did the same thing with the goal of making people smarter?

I know this isn't a new idea and sounds incredibly naive. I don't care. There's a need for this whether the demand is there or not.
windows explorer has had that feature for years as well
Isn't this the kind of thing that webRTC will allow people to create?
> There is no intrinsic value in bitcoins unless it is possible to easily trade them with a outcome of receiving capital.

I hate when people use word 'intrinsic' when criticizing bitcoin. Anything that is in limited supply, transferable and durable becomes valuable or forgotten. There's no way that bitcoin will be forgotten and bitcoin is as durable as any P2P network. Whether you can legally buy and sell bitcoins is irrelevant. Of course I'd much prefer if bitcoin was mainstream than black market but being black market only still places price of bitcoin higher that it is today, I believe.
perl, templates, and rsync - here is my earlier solution for server configuration management & installation tool: http://www.jlsync.com/ and https://github.com/jlsync/jlsync

And there is a bonus version in ruby: https://github.com/jlsync/jlsync/blob/master/jlsync.rb
Depends on the battery life of the remote. Most people wouldn't be too happy if they were changing their batteries every few weeks because they watched a few movies with headphones.
It's not all that off-topic. Cree does make LED flashlights, presumably with closely related technology. If they do a good job there, that's a good indicator that they might do household LED bulbs well also.
But what I actually don't get it is: what is stopping me ( or anybody else ) to start creating similar, let me quote "experimental new digital currency that enables instant payments to anyone, anywhere in the world" ?

Isn't a second, or third such p2p currency due to come? Won't this distroy the current bitcoin uniqness, thus devaluation, etc, ?

What is protecting the bitcoin from this?
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YEs thats what I meant. What can a H4 visa holder do ? My spouce is working, I am not though I am equally qualified.
Use a pair of them for each fixture? At $20 it's still cheaper than a single lower power LED bulb from other brands.
It's amazing how widely people vary on light. It's observable across major cultures, or even different families.

A Japanese IKEA I went through recently had a display which would allow you to switch between 'Japanese' style lighting' and 'Western' style, with western style being dimmer, and with warmer color temperature.

I immediately found the Western one more comforting, relaxing, while my wife (Japanese) prefers the brighter one. Internal lighting in Japan is almost uniformly overhead neon, without the baffles you'll see in many North American offices.

I've grown used to it, but would rather work in the dark.

I'm sure there are many people that, like you, feel that these LED bulbs are too dim. If you're at all curious though, I'd recommend that you find one and give it a shot, many of them /feel/ brighter than the numbers would lead you to expect when compared to an incandescent.

It might be better to compare on the basis of Lumens, as watt's are a measure of power instead of brightness[1].

1 - http://en.wikipedia.org/wiki/Incandescent_light_bulb
I would disagree. I think a event like a major exchange being raided would cause a mass selling panic.

When megaupload was raided, it wasn't the only one that was effected. Almost all of the other file lockers shuttered/closed immediately. Its foolish to think other exchanges would not follow suit if one was taken down. If there is no way to turn your bitcoins into another currency, you would be silly to think you could still buy goods that cost someone else money with them. Whos going to spend money to lose money?
Don't break the chain!!!
I fail to see a correlation between how good a school is and how many squares of numbers you have to memorize. I don't remember being forced to memorize any higher than 10 at either of the schools I went to and I'd classify them both as 'good' in the grand scheme of things. Once you know the multiplication table up to 10 and a couple of techniques for multiplying larger numbers there really is no need for memorization.
Pretty ingenious idea, however, I don't know how it's going to catch on. The vast majority of searches are one-off phrases
to whomever is building website thinking "oh, I know where my user wants to be in the page": please take a deep breath and rethink your assumptions.
Someone could put a ton of put options on BTC, pay several bot networks to DDoS MtGox for 24hrs, then sell.
I cannot stress how important this is, don't just shrug of the questions your kids ask, how stupid, obvious or unexplainable the answer may be. Even if you don't know the exact answer.

My son asked me a question some time ago "What is a tree made of?" ... "Wood" i said, which just backfired another question "What is wood made of?" to which I actually took the time to explain (to my best of knowledge) that wood exists out of fibers which in turn exist out of carbon which is an atom, explaining that materials exists out of structures built from atoms while I drew a sketch of an atom and how it can bind to other atoms to form materials like wood, iron, etc.

The look on his face was worth millions and it made me feel real good and proud that my 5 year old son took interest into something that even for an adult without proper knowledge is hard to comprehend. I'm fairly confident that all this went way above his head but the fact that my explanation piqued his interest and set his imagination on fire is more than worth it.

Explain all the things!
Startup Lessons From Pink Floyds Dark Side Of The Moon
LEDs go to 100% brightness instantly, unlike CFLs, which is very convenient for many applications (closets, corridor, garage, etc.).

But at this price point it's already about different convenience - not having to deal with replacement. Regular lamps go out and then you have to replace it, it's a hassle - stockpiling different nominations, opening fixtures, disposing old lamps. With LEDs you just put them in and forget about it. I basically replace all bulbs that go out with leds if fixture allows it because of this.
Just that the masses currently agree that bitcoin is 'the' current p2p currency. Nothing would stop the US Gov (or walmart!) from making/publicizing its own bitcoin competitor which would instantly, immediately, crush bitcoin. (Why use bitcoin when you can use usgovcoin, all other things being equal)
Yes having only "little money" forced Woz to really focus, think and experiment. However, I'm sure living in the same neighbourhood/city as people from IBM, Intel, HewlettPackard, etc wasn't bad either ;-)
Music to your ears: The quest for 3-D recording and other mysteries of sound.
I think what we see here is a case of putting your mouth where your money is.
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Wikipedia has this (and more) to say on POSIX:

Not to be confused with Unix, Unix-like, or Linux.

POSIX (pron.: /ˈpɒzɪks/ poz-iks), an acronym for "Portable Operating System Interface", is a family of standards specified by the IEEE for maintaining compatibility between operating systems...

http://en.wikipedia.org/wiki/Posix

The old MS POSIX subsystem was replaced by the amusingly named SFU (Services for UNIX). Then that got replaced by the bought-in Interix.

Mac OS X is UNIX because it's certified under the Single UNIX Specification:
http://en.wikipedia.org/wiki/Single_UNIX_Specification

Windows is not in any way UNIX. There aren't even any certified Linux distros (AFAIK). Mac OS X is UNIX.
oh come on...
Looks interesting.

80% of server automation can be solved by "copy master file and restart the service that uses it". I don't see anything obvious about restarting services in jlsync, but the copying seems well thought out.
bitcoin FAQ covers this: nothing.

Link: https://en.bitcoin.it/wiki/FAQ#What_if_someone_creates_a_new...
No, they've got 2 big locations in Germany, but are in Germany only...

http://www.hetzner.de/en/hosting/unternehmen/rechenzentrum
LED is worse. All the heat stays in the fixture. With CFL most of it is emitted together with the light.
I have it, but it's kind of a limited data set (1).
Nothing is stopping it. There are already a bunch: Litecoin, Solidcoin, Ixcoin, PPCoin, Terracoin, (to a lesser extent) Devcoin, and (to an even lesser extent) Namecoin. Seemingly the only thing stopping them from overtaking Bitcoin is Bitcoin's popularity.
> After some tweaking and market testing people settled on the current balance.

FWIW, old style incandescent lightbulbs have effectively been banned in europe, australia, brazil and other places for years, and will be such in the US next year, IIRC.

While I think that is overall a good thing it's not exactly an invisible hand thingy.
Your comment reminds me of this article written 10 years ago: http://freecode.com/articles/too-much-free-software
You are recognized by your own skills and good work, and you don‘t have to criticize others for not doing good work. Just worry about your own skills.

Wozniak is a very technically brilliant guy, and I have the utmost level of respect for him. But the sentence I quoted above just shows that he's also a stereotypical "nerd" in a lot of ways [1], in the sense that he has a very poor understanding of how humans operate, both at the individual level and the organizational level.

Specifically, just worrying about your own skills is not enough most of the time, especially if you work in any kind of team setting where success requires every team member to pull their own weight. If someone is fucking up constantly and ruining your team's objectives and deliverables, you need to let them know. You can be nice about it if you want, but if you actually care about your work then you absolutely cannot "just worry about your own skills."

Heck, this isn't true for just companies. I think every one of us has had group assignments in college where one person just didn't do the work or did it incorrectly. Someone like Woz might have let it go, because people who are taught by their parents to be "nice" tend to avoid confrontation due to the unpleasant feelings it brings. But the right thing to do - both morally and otherwise - is to criticize the person for slacking off and file a formal complaint if they don't start performing.

In fact, now that I think about it, that's probably why he didn't call out Jobs on it when he found out that Jobs screwed him out of $5,000 back in the day. He just didn't have the confidence to fight wrongdoings, even when he was directly hurt by them (granted, Jobs was Woz's polar opposite in the sense that he had an extremely strong personality, one that would have crushed Woz's). Also remember that when he built the first Apple computer, he wanted to give it away for free because he was just a nice guy. It was Jobs who was a lot more grounded in reality and convinced Woz that they needed to sell it for money.

[1]I put it in quotes because I'm not using it as a pejorative.
I can't find any information on the CRI (color rendering index) of these particular bulbs, but Cree was making a bulb a couple years ago that was rated over 90, which is generally considered excellent. If these are comparable, they're a fantastic deal, particularly given the warranty.
So my bitcoin-based new business will depend on a popularity contest??

I believe more in a energy-bound trading value for the future, much like the petro-dollar. Why not solar-coins, based on the value of solar energy ( GWh based ) traded on the markets? We all consume energy, right?
Airpair Connects Startups With Expert Developers To Get Help With..
I'm sorry but without Google Suggest I won't use it even though I like the idea.
In my entire life I've broken exactly 1 CFL - and I was a kid at the time.

And you don't have to vent your house, that's an urban legend. The mercury is elemental mercury which isn't very toxic, and extremely poorly absorbed on top of that.

(The toxic mercury is organic mercury. Some elemental mercury will be converted, which is why people worry about it - but it won't be converted in your house.)
This is even more impressive when one considers the typical lifespan of a small business; 44% don't make it to 48 months[1]. I wonder if Constant Contact manages to attract more successful businesses, or if businesses that seek out and engage in such marketing opportunities are just more successful.

[1] - www.nbcnews.com/id/16872553/
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"you are here" comparisons are obvious. i think i'll be buying some bitcoins in 3 months.
QED.

Take my advice (and prediction too): Energy backed currencies will be the future. Not now, but in 50-100 years.

Gold ( used to back currencies now) is also popular, but it has also _some_ intrinsic value attached to it. But at some point the switch will be made so that the currencies will be backed by the amounts of energy reserves/production.
Good point, his email reply got me wondering how familiar he is with Korea and whether he was deliberately tailoring his message for a Korean audience as well.

He talks about not learning from books, not caring about what others think about you, choosing a company based on how they treat you and not how "hot" they are - These are all the complete opposite of what Korea values and the way most Koreans live (book-learning, image-conscious, brand names over personal satisfaction).
And that's exactly where they're going here; offer a long warranty and easy returns, while producing a product that's cheap enough (definitely in 5 - 10 years) that people won't actually bother with it. It's what happens with mainstream consumer electronics; 3 years warranty, sure, but would you return a $30 machine to the webshop you got it the cheapest to claim that three years later?
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Japan travel guides and tips on Hanami Cherry Blossom Festival 2013; do's and don'ts of Sakura flower viewing; how to back up travelling Camcorder videos to DVD or computer?
For me, I find long periods of time spent working in front of a screen can lead to anxiety. When I start getting distracted in many directions the feeling starts to come on. Listening to this ambient noise for the past half hour has calmed down that anxious feeling and made me feel more focused.

I am however used to spending lots of time working in public spaces in the past, and have spent the past six months in a more isolated work environment. (On an off the grid property 50m up the side of a volcano that you need to take a boat to access)

Maybe this is just putting me back in my comfort zone.
The phrasing of the question is imprecise, but I'm assuming the idea is that "inserting a permutation into a BST" means the nodes are inserted in order and the tree is never rebalanced.

It's an interesting question. And it's certainly much more difficult than any phone screen questions I've been asked by other companies, and also harder than my phone screen question at Google, but not as hard as some questions I had on-site there (I didn't get an offer).

Suggestions: eventually you'll want to get to some sort of recursive formula, but start with small, concrete examples and reach the answer simply by counting.

For instance, get the permutation [1, 2, 3] (or even just [1,2] then [2,1]), draw the tree and think about how many other permutations would generate that same tree. The point is to confirm with interviewer that you got the question right. Then you consider [2, 1, 3] and the other permutations. At this point you'll probably get a hint of one case when you can swap 2 numbers and one case when you cannot. Then you test it with some 4-node trees. Hopefully at some point you can come up with an informal, English-language formula on how to calculate the answer for a tree if you know the answer for the 2 subtrees. If necessary, refine it, but I don't think the interviewer would necessarily expect you to give a closed formula answer.

If it makes you feel better, I've recently had a phone interview with a certain large market data company and all they asked was HR bullshit like "what does make motivate /demotivate you?". Apparently I didn't give the expected answers, and I didn't pass.
All the CFLs I have (except for 6 very very bad ones) go to full brightness instantly (or close enough that I can't tell the difference). (I use those bad ones in a bedroom fixture where the slow start is actually a feature. Made by Feit Electric - don't buy that brand.)

So if your CFLs are slow buy better ones. Walmart has good ones.

A CFL will last about 8,000 to 10,000 hours - I have to replace maybe 1 bulb a year in my house.