skysight-inc/HackerNews huggingface dataset:
For the 300-400 page version see: "Classical Mechanics" by Goldstein.
I highly recommended this book. The first four chapters are a solid treatment of everything you learned in first year physics. For example, you will understand that the angular velocity \omega is actually \vec{\omega}.

Okay, so the gist of the whole Hamiltonian/Lagrangian is you we can solve problems by using energy calculations. The //Hamiltonian// describes the total energy in a system H = K + V. The Lagrangian is a bit f-up because, apparently, all the information you will ever need about the system can also be computed[1] from the Lagrangian L = K - V. The relation between H and L is called the Legendre transformation.

But the fun doesn't stop there. We have three different ways to solve physics problems until now (1) Newton (dynamics->a->kinematics), (2) Lagrangian + L-eqns, and (3) Hamiltonian + H-eqns. You would think physicists would stop at this point. Be like "OK we got three now, done!", but no they thought of an even more general way to think about the world.

The Hamilton-Jacobi equation is the final piece of the classical mechanics puzzle. In the last three chapters of Goldstein, you will learn about the connection between the Hamilton-Jacobi and Schrodinger's equation. Essentially, if you take the limit $\hbar \to 0$ in the main equation of QM, it simplifies to the Hamilton-Jacobi equation. Read JJ.Sakurai's ``Modern QM'' to continue.

[1] http://en.wikipedia.org/wiki/Hamiltonian_mechanics#Calculati...

[2]
http://en.wikipedia.org/wiki/Hamilton%E2%80%93Jacobi_equatio...
FYI the entire public order book on MtGox is under $7mm USD.
Like I said knowledge external to the transaction.

Take their info, place it in the SABRE (?) booking system and allow seat prices to vary by legroom and then airlines are competing on something other than price.

(To be honest I expect there are things they will find more useful to compete on)

Plus - when I have to wade through 100 differen options of legroom, childcare, airport parking and fligh routes I will pray for a return to the old days.

I have a sneaking suspicion the airlines are right - we do just see them as a bus from A to B.
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Downvoting, Mastery Level
Cool project.

I actually don't like the use of offset however. Why do I want to offset Chic Fil A? If I don't even eat there--I don't have anything to offset. Offset also makes me feel like I am helping to return to the current status quo. What if I don't want the status quo? What if I just want to fight Chic Fil A?

I think that the idea that users contributing a small amount of money to combat the negative spending of some corporations is incredibly sticky. ("Look at the power of my small dollars! I'm making this evil corporation burn their money!").

But how do you convince visitors to the site that this math adds up? Users may want to donate but would probably be more likely to donate if they were convinced their dollars had that much power. Maybe an infographic explaining it?
I was talking about human presence on Earth in general.

But newspapers are still exactly the same as they were, stuffed with ads. They might not have dominance, but haven't really changed.

And I didn't say anything about keeping RIAA or locked down systems.
I don't own a game console and never will. I find Android too locked down for my tastes, if that explains anything.

It's true that selfish efforts to fight back changes are pathetic and must be stopped, but abolishing patents/copyright completely would just cause massive depression. I don't like how companies are abusing it through breaking your own stuff so you buy new stuff or replacement parts, but that's their business model. The underlying issue is that the corporate culture requires such behaviour, how else wouod you pay an army of managers and the board-horde?
Plenty of big sites use Twitter to inform users of down time, I prefer that, do you expect me to go hunting down their status page or just have it come up conveniently in my newsfeed...

Just google "reddit status" and check the first result.
“Winner’s Curse" would indicts the game/race is over. It's only begun.
We've had laptops like that for a decade. Tablets make sense, I don't doubt that, and laptops that can turn into tablets are fine, but the technology is just silly in regular laptops.

If Windows 8 is all about Microsoft getting ready to ditch regular laptops let alone desktops entirely... well besides thinking that is a mistake I think they should have manned up and never pretended it was for regular laptops in the first place.

I've used a surface briefly. I walked away from it with that "gee wiz that was neato... but adds no value to my life" vibe that I got years ago from Beryl/Compiz.
> We do have every right to choose where our taxes go. They're called elections.

That just means that others decide what happens to my money.

> However, considering that your wealth was entirely derived from the society at large

This is just a false assertion. My wealth is derived from my work.

> That's why I contribute to a collective fund and then hire managers to disperse said dollars with an eye to betterment of society as a whole.

You also force everybody else to do the same. Those altruistic managers then spend the money on foreign wars and bailouts.
You're right, it's just a few edge cases that make the bedroom tax horrible.

The theory is that people are over accommodated, and should move to more appropriate housing. But moving home is expensive, and these people by definition don't have much money.

I haven't seen evidence that moving these people around will make any difference to the housing shortage.

But yes, it's a good idea.

Housing benefits for cohabiting / single people is weird. Ann and Bob live in separate flats and get full benefits each. They move into a flat together, and as a couple they get less than either of them was getting singly. That system is wrong, I think.
I wish!

Unit tests that verify the in-order invocation of several different void methods have nothing to do with reinvention of purity.

I think a better argument would be: the best way to write testable units is to write pure functions. This argument was made for example in Hughes's Why Functional Programming Matters. But it's not really a question of OO vs FP.

There's a seemingly important pattern that I don't know if there's a common name for. It's something like "Replace Side-Effect With Value." Or maybe "Inversion of Side-Effecting." This is relevant even in Haskell. Either you write your whole program as a big messy monad transformer stack with IO at the top -- I don't know how to unit test that, much less prove anything -- or you define the application logic as pure functions that give instructions to a simple driving "side-effect interpreter."

XMonad, the Haskell window manager, is written in this latter way, with lots of unit tests too. There's a cool video walkthrough of how the code works -- http://www.youtube.com/watch?v=63MpfyZUcrU -- and a document called Guided tour of the xmonad source -- http://www.haskell.org/haskellwiki/Xmonad/Guided_tour_of_the....
Startup GridCOM uses photons and quantum physics for smart grid security
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There is an other category: people who want high-commitment, high-uncertainty, and chance of high reward they get by starting their own startup.

Maybe you're asking people the same sacrifice you're doing, except that they'll be doing it for you rather than for themselves?
I know quite a few people that are gay and would love to have the opportunity to get married in the state they reside in. So when Chick-fil-A dumps money into campaigns for ads against equality bills I sure as hell will not give them a single cent.

I can't pick and choose if I want to pay for tanks but I can certainly not pay companies that are actively trying to hurt the people I love with my money.
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When mapbox first launched tilemill was when I first discovered them. I read about them on here, and went to check it out.

At the time I didn't really understand the value proposition. It was google maps without any of the useful API features like geocoding and routing. Plus they were using openstreetmap which at the time was lagging noticeably behind google data in my area [1].

Tilemill seemed nice, css to style maps. But google had a nice style wizard [2] that changed the maps on the clientside, no need to upload a custom tileset, which is what tilemill seemed to do.

To be honest I generally forgot about them. But then google started charging more for their maps, and I remembered them as an alternative. I still missed the flexibly google had for their map styles though.

However in the past week I've come to see them in a whole new light, in part due to this post, but also due to their vector map post [3] causing me to dig back in and play around. I now truly believe these guys are one of the coolest "underdog" startups I've encountered. They've been chugging along and have created some awesome advancements, or at least competitors in the online map space. I hope to continue seeing awesome work like this, those map images are gorgeous.

My only request is that they give a little more detail into how to create custom styled maps like they show in the vector blog post I linked to. The process of using their street maps with custom styles is a little hazy to me right now, although maybe I'm missing something obvious.

[1] It still does, but now only with minute details like service roads on the local university campus.

[2] http://gmaps-samples-v3.googlecode.com/svn/trunk/styledmaps/...

[3] http://mapbox.com/blog/vector-tiles/
I/O 2013: One Google, Under Page, With Unification And Usability For All
human.io was cool and has a lot of potential.. did it just go offline? :'(

http://human.io
There are a number of factors in play. But without knowing how the priced seats, and the number of capacity flights, this could just as easily be normal growth as it could be the impact of extra seats.

Not that I'm saying you are wrong, just that it's not the only explanation of the known facts.
This one looks like the current from a stream : http://wry.me/hacking/Turing-Drawings/#4,3,3,2,0,0,2,1,0,1,1...
Germany tells Google to tidy up auto-complete
Yeah, that's true. You can make it more robust this way:

subst m: %USERPROFILE%\My Documents\My Dropbox\
2,000-year-old Mayan pyramid in Belize destroyed by construction crew
YouEye is your eye in the sky for cloud-based user-experience testing
Thanks! That really should have been in the post, glad to finally get some closure.
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Ad hominem as in "small-minded busybodies"? The irony...
Sure, but of course there are other options. Both liberal capitalism and national socialism/state communism (Soviet) are highly centralized forms of government, whereras anarcho-syndicalism is decentralized and highly capitalist, and anarcho-communism is decentralized, based upon overproduction and a radical reimagination of property rights.

Barcelona and other parts of Valencia with a strong culture of trade were famously stable (the essential city services remained up and running, etc.) flying the black flag as an anarcho-syndicalist region in the 1930s for a few years before being infiltrated by the communists and dominated later in the Spanish Civil War.
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We offer the safest Runescape gold. There are abundant cheap RS gold in stock. You can buy lots of gold here and the prices are very cheap.
And fund things you object to?

Why imply not funding things you object to as not being civilised? Makes no sense. Or is it just a justification for laziness?
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Per CloudWatch stats, it varies for machine and region. We have a 6 machines array in three regions receiving round robin traffic from ELB's. It is network bound. However, the CPU graphs say otherwise. Here's the output of three machines in three regions: http://i.imgur.com/nadGmDH.png while their siblings follow the same trend. The working set resides in RAM. The disk and network follow the same path. These are instance store machines sharing as little as possible. Failing over a multi-AZ RDS for maintenance reasons did not change the graphs.
It's the asking for help on Twitter he's criticizing, not the fact that they notify about the down time on Twitter.
MySQL 5.6: single-threaded performance regressions
> the world has been that way for all time.

(I'm not an expert on this, but as far as I know) many traditional/"primitive" societies have much less problems with homelessness and mental disorders because of stronger family support. (Of course, they have other problems that we don't have.)
I'm quite amazed how nasty living environments rich people can bear. If I were to bet I'd swore that rich would do something about the poor before it gets anywhere near as bad as in US. But then again there's India. So I stand corrected.
Who's to say they aren't? Spending 10 seconds asking on Twitter, and getting an 'oh yeah, I had that and fixed it with x, y and z' in response sure beats staying up until 2am fixing it.
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You're kidding right? RAID is only good for dealing with HW failures, there are many more kinds of SW failure that can screw you and leave you with nothing, while having a perfectly good raid. Replication isn't a backup because if you screw up your dataset, well that screwup just got replicated.
The bot is "in plain sight", and can be kicked and banned by ops. That's a major difference. Further, the bot is only given the ability to eavesdrop when enabled by authorized participants (e.g. it was either invited or not kickbanned by people who could see when it joined the channel).

The visibility and lack of expectation of privacy creates a very different situation. If this "MS bot" showed up in your conversation and said "hi, I'm going to visit every URL you post unless you kick me off this conversation", it'd be a very different situation.
I feel for you guys, but it sounds like a disk error. If you're not experts, you need to do one of the following A) rollback to a snapshot B) restore from backup. If you have neither of those, take a sql backup, and pray you can recreate the broken data.
All I find is a BS in IT, with a concentration in software development. And the IT department is under the School of Business. It doesn't look like they actually offer any computer science courses.
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ircbots generally operate in public or group channels. I think there' a distinction between this and a bot operating in a private communications channel.

>I think the better choice here is to ensure that the public has a way to communicate securely and that our mental model of "trust usually, distrust as the exception" needs to move to "distrust usually, trust as the exception".

I can't square this with your previous stance easily. This would for me imply that private communicates should have end-to-end encryption. And that another party couldn't intercept URLs unless they were explicitly transmitted out of band by the client (which I would guess isn't the case here).
Has anyone outside Google used Go for any major commercial development? Are there any success stories out there to read up on?
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What were the regulations that prevented private landline providers from snooping on conversations?

Personally, I find this disgusting as well, and I agree that the lack of ethics in our profession is a huge problem, though fueled by user ignorance and apathy, but as much as I'd welcome an healthy backlash, I shudder to think of the lobbies that would "inform" the regulators when drafting such laws.
It took me ... a long time to find that. And I am much more keyboard-driven than mouse. Just being able to hit 'u' is awesome.

Other control keybindings often interfere with windowmanger bindings I've been using for well over a decade. The number of competing sets of controls when you start embedding viewers in apps in webpages in browsers in window managers is pretty bad.
I ditched all wireframing solutions. What I do is open an illustrator file, with multiple pages and scheme the whole project there. Then I save it to PDF and I don't have to work on other things since everyone can read the PDF file and edit it, ofc.

With Illustrator and some years working with it I achieved a nice level of detail in my wireframes, they look pretty much a real thing than just, wires everywhere. Most people and developers understand things when they see the UI very detailed with nice explanations.
Maybe you could also have it do face recognition and tie that in with sentiment analysis of people's twitter, facebook and Google+ feeds so that you can be cold and aloof or just plain avoid people with "bad" viewpoints.
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Making it less risky to work on risky things is exactly why I think socialism is great for business.

Australia is often called out for it's "lack of startup eco system", and lack of early stage capital for tech businesses, however it's a hotbed of micropreneurship and the primary reason is that no matter what, you've got a reasonable level of healthcare, your kids have a reasonable level of education and you have a reasonable level of housing.

I started from (financially) virtually nothing. I mean ... let's be honest everyone says that and yes I had advantages others didn't have and my family was essentially middle class but financially speaking I was always essentially what you would call "poor" and raising 2 daughters whilst being this poor and not having a "real job" for the past decade would be much scarier in the US than it is in Australia.

The benefit to the country is that ultimately, I have the chance to build something great which creates jobs and grows the economy (yeah ... I'll urr let you know when that's done!) but if I fail, it's no big deal really.
Abortion clinics are tiny businesses compared to giant conglomerates like Koch. I don't think there's much boycotting you could do even if you wanted to.
Ubuntu build their DevOps solution JuJu with Go.
https://juju.ubuntu.com/
http://www.youtube.com/watch?v=kKQLhGZVN4A
I've been focusing on the d3.js tag a lot lately. There's a lot of noise ("I want this graph. Can it be done?" type open ended questions), but it has been teaching me a lot and solidifying many things I kind of knew before into things I know. I hope I can get some form of career advancement out of it, but the effort is paying for itself so to speak.
The OS X deck is 3D since Leopard, but it used to just be a rectangular array of clickable pictures. With little triangles under the "open" ones.

Humans adapt. People who grew up with console terminal interfaces find them more usable than point-and-click interfaces. The assumption that common people will be all confused and miserable if you take away the bevels from buttons seems kind of unimaginative.
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Though, so is using a SOCKS or HTTP proxy. To be consistent, the tool should really be reading PCAP dumps. Too many applications either don't support proxies, or only use them for some things.

The best exception to this that I can think of is Chrome, which even tunnels Silverlight and Flash through its defined proxy.
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Also, #postgres on Freenode. No matter when or what you ask, one of the regulars will usually respond instantly with very high-quality advice. No single product, no matter whether it was free software or not has ever reached this kind of support quality for me.
https://gist.github.com/ungerik/3731476
He didn't refuse to comply. He stated he's losing the potential to increase his user base from daily follows due to the lack of his store being open. Also Etsy closed his entire store for one offending item. If he has other items in his store then they are denying him of his income. This could slow down the creation of the new items or halt them completely if he was dependent on the income for this.
I think you're misinformed.

Here are some more details if you're interested:

http://en.wikipedia.org/wiki/Garbage_collection_(computer_sc...
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Before governments start clamouring (in vain) to shut down Bitcoin exchanges on spurious claims that they're money laundering havens, I thought I'd remind everyone that neither HSBC, Barclays, Credit Suisse, Standard Chartered or ING were shut down when they were caught laundering money.

http://dealbook.nytimes.com/2012/12/10/hsbc-said-to-near-1-9...

"Give me control over a nations currency, and I care not who makes its laws.”

Baron M.A. Rothschild
Great design.

One suggestion is that it would be great if I can copy and paste like on Trello. This would mean that I wont have to keep saving files locally first and then drop those files to your site.
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Open source Java projects: Akka
But we're looking at revenue, not profit. None of the expenses have been considered yet.
The driftwood wasn't made by the person, but by nature.
You saying the clockwork is outside the scope of individual construction, but this guy is getting hammered for using a circuit board? Because yeah, those are so much easier to knock up compared to a clock mechanism...
Any Tom, Dick or Harry, can drill a whole for a light fitting in some driftwood.
>> "that they pay for themselves (through social security)"

Lulz Europe.
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That's because your startup is likely to fail. why should people want to design a multi-million dollar system in a "HTML5" - Browserbased - Solution done by a (max) 10 person-team? I just don't get how you'll ever appeal to your target group.

But maybe -- hopefully -- I am wrong.
If they came up with a way to run at 90% capacity instead of 80%, I wonder how many seats they could remove and how many inches of leg room could be gained.
Yes, and you regularly see notes about how [some bot] has caused some developer to learn why this is bad practice whenever a link like that gets accidentally exposed in a way that allows crawling.
And one of the freest (read: least regulated) economies in the world. Makes you think.
I'd like a red X over people that discuss, say, the political opinions of celebrities.

Also I think avoiding products if you disagree with the company owners is laudable and I don't really get why you are responding with such snark.
So you prefer to spend your life doing band-aid actions instead trying to fix the probem in it's root, that is, money in the wrong pockets. All these problems you prefer to work with are consequence of an unfair and corrupt system that is screaming for a fix. These anti-ethical companies are the ones responsable for turning politics and democracy (if it exists) into a mere tool for personal and not social profit. Read a book called The Black Book on Brand Companies and start scanning barcodes.
Meh. Among the other reasons for testing the author didn't touch on:

* It's not always about the tests. I TDD code (functional as well as OO - hell procedural come to that) as a design tool - not a testing tool. I write acceptance tests as tools to help us understand when we reach "done" and as ways to track progress.

* It's about stopping regressions. Test suites get in the way of accidental behaviour changes.

* There a way to scale team communication of how the code should behave.

I love FP dearly, but if it replaced testing why do I see so much FP code with test suites ;-)
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"devalues the thousands of dollars I've spent"... sunk costs fallacy