skysight-inc/HackerNews huggingface dataset:
This is slightly reminiscent of Get Satisfaction's model of creating support forums for companies unless they opt out.

And sometimes those companies take offense: http://37signals.com/svn/posts/1650-get-satisfaction-or-else
Can you mention specific issues with Unix permission management that Windows solves?
I don't know any enterprise installations of Mac OS X Server that use AFP.

As for kerberos, that is painful on any platform. At the moment at work I am trying to figure out why Mac OS X takes 10 minutes to connect to a Windows Server 2003 based file share, all I see with Wireshark is a bunch of Kerberos stuff being thrown around, whereas Windows clients connect without issues, but without ever attempting to use Kerberos.
I have spent a lot of time with them, actually, given that Northwestern's most popular major is economics. I'm also in a frat and enjoy drinking beer and telling dirty jokes with many of my finance-oriented brothers. Of course, when the rubber meets the road and they have a statistics test the next day, they're not out partying, they're studying all night with a big cup of coffee.

I would say that this kind of popularity is less common in high school, though. Simply the fact that you care about school and study is likely to put you into a separate group. College, however, is a different story.
Those applications aren't launched or available from the outside. If the user runs/double clicks on something it is already game over. Social engineering attacks are never going away so long as humans are humans and want to see Anna Kournikova naked.
It is really as simple as noting the robust heritability of cognitive traits (see "The Blank Slate") and the strong correlation between intelligence, conscientiousness, and wealth.

But surprisingly, many highly intelligent people (including many in this very thread) will actually deny that they have any natural cognitive advantages over the poor. They will readily admit they are smarter than those "idiots" who can't code Fizzbuzz, or the ones who comment at Youtube, or the software engineers who're still doing Cobol, or the tea partiers...but they won't admit they are naturally smarter than the average poor person.

In fact, they are actually more ready to characterize themselves (or others) as oppressors of some sort than to admit that they are gifted.
Most very poor people are not young, athletic, with good physical and mental health, no dependents, and the background security of being able to leave their circumstances immediately any time they want.

Chicken and egg problem?
At 6% APR after 40 years it would be over $1 MM.
He DDoSed my friend's imageboard, and he joined our IRC to brag about it. He DEFINITELY has mental problems -- he was threatening to fry everyone's Internet with his botnet and he also threatened to DDoS my startup.
You can turn on parental controls and select which apps a user can execute, either per checkbox or (if they are from the App Store) based on age ratings.

Parental controls will, however, disable installing apps for the user completely. They get a prompt asking for the admin password. As far as I can see there is no way to enable users to only install apps from the app store. By the way, there is such an option in iOS.

I don't think anyone ever complained about them adding options to the parental controls, so Apple could absolutly add an option to install only App Store apps to the parental controls.
your Windows clients are probably using NTLM (or NTLMv2), Microsoft's old, terrible auth protocol that the Windows team eventually abandoned for Kerberos. there are policy settings you can change to force Kerberos; I'd suggest Googling to see if you can find them, and see if it breaks your Windows clients as bad as your OS X clients seem to be.
A hybridized approach may work for you in those higher periods. Depending on your bottlenecks, it may be possible to spin up ec2 instances during your high load periods that will cover your necessary additional capacity. (Esp if you are bw or RAM limited, you can setup asset servers on ec2 and just change DNS pointers to enable them.)

One other advantage is your future scalability, as well: as your site grows, you'll need to "resize" your dedicated instances. If that is something you need, then that's another advantage (really, it's continuous ability to scale versus discrete scaling events, e.g. upgrading a dedi server).

That said, if you have a good dedi provider, upgrading those shouldn't be too tough.
The solution will never be to only show happy shiny aspies; rather it's to let people see how incredibly diverse the group of people carrying that (or any other) label is.
Sudden unforseen and expensive illness in the family isn't really all that common though. Furthermore, it is only really a problem in countries such as the US which don't have affordable healthcare for the poor.

There certainly are many people in this world that are poor because of a series of very unfortunate incidences that put them at a disadvantage. However, I think it's pretty clear that despite how common that may be, it cannot begin to explain the majority of poverty in "1st world" societies.
Discount that $1M with 40 years of inflation to give some idea of what the purchasing power might be and it doesn't look quite so impressive.
Capitalism reduced the poverty of Singapore, South Korea, Vietnam, Chile, and Estonia (to name a few).

What country was built from foreign aid?
Yeah, I'm more bothered by the services their default process installs. They can monitor their modem, if they must. They can keep their nose out of my system. Though branding the IE windows title is just downright annoying, particularly for non-technical users. In addition to taking up space and being distracting, every screenshot they make carries it, like it or not.

People are reminded of you every month when they pay their bill, Comcast. Don't push it. /rhetoric
Impedance applies to AC and DC circuits, but at DC the imaginary term is zero, so only resistance is present. However, the term "impedance" still has meaning.

I think your question about AC on instrument cables stems from the popular use of the term, "AC" as in AC power. True, amplifier cables aren't carrying AC power but the signals are still considered AC since they are time-varying.
His clarity of thought is what just astounds me.
Valuation $8Bn
Stealing back options $100K
Meaning no founder or employer will ever trust silverlake - priceless

Silverlake are now totally worthless as a VC and any startup funded by them who have engineers with options (vested or not) is in serious risk of a mass exodus.
I had not thought about that, would OS X fall back to using that in case Kerberos doesn't function? Thanks for the suggestion!
nope, mtkd nailed it when he cited the "passing off" laws. they're not just banding people together to get bulk discounts, they're implying that the businesses in question already support their model, and are using those businesses' brand recognition to add legitimacy to loopt.
Just notice one important point : in Europe, cargo train is moribund. Virtually everything is moved around by millions of trucks. In the US, it's the other way around, most stuff is moved across the continent by train. They need to be very careful not to sacrifice it for high speed passenger rail.
I wonder if the efficiency would be improved if the whole engine construction would be under the surface level.
Can companies really opt out of Get Satisfaction, or will they always be presented with the "Company X has not yet committed to open conversations about its products or services."

If Loopt explicitly allows companies to opt out (and prevent the creation of deals for that company) then perhaps the service might be beneficial (companies that opt in to stay may get valuable feedback of what the consumer wants/would be willing pay for).
That doesn't really explain impedance. First of all, you need to know what resistance and reactance are to get that explanation, and second it doesn't explain why it's useful or how to do calculations with impedance.

On the other hand, kwantam's explanation is easy and clear, provided you know what a Laplace transform is (which you're going to need to understand reactance anyway). If you set up the system of differential equations for a linear circuit, how would you go about solving these equations? You take the Laplace transform, and you get the equivalent algebraic equations of the form V = ZI for each element. The numbers Z that appear are the impedances.

From a mathematical viewpoint, impedance is a simpler and more natural concept than resistance and reactance, since it appears naturally when you solve linear circuits.
Supporters Betting On New Online-Poker Bill
It has a lot to do with the peace of mind as well: "OK, I have to work till 60, but then I'm going to be pretty comfortable"

Inflation obviously takes a bite but it takes the same bite even if you put $5k a year when you're 40.
It is a pity the author does not include at least one Linux distro. Especially for the mentioned "targeted attacks", servers are the most likely targets.

And in the servermarket, OSx is hardly around, and is the share of various Linux servers growing larger then Windows, even.
It is weird, but ASLR and DEP are regularly bypassed, anyways.
Let's use historical data instead of back of the envelope guesswork.

Over the last 40 years (1970-2010) the average S&P 500 return has been 11.61%, while inflation has been 4.4%. Past performance not necessarily but usually predicting future performance, but, with those rates...

Over the next 40 years $100k would grow to $8.1 MM in future bucks, or $1.45 MM in 2011 dollars.

http://www.moneychimp.com/features/market_cagr.htm for returns, http://www.moneychimp.com/articles/econ/inflation_calculator... for inflation, and http://apps.finra.org/Calcs/1/Savings for savings calculations.
If you don't think this is coming, I've got a clue to sell you.
I'm not sure that analogy holds. I'll accept that in the literal case it does, since I can easily see how being nervous would effect physical coordination while walking on a tightrope, but I don't see how being nervous of failure would render you unable to work hard unskilled labor jobs or save money. On the contrary, I expect it would help by providing real motivation.
OpenBSD's pf? I highly doubt that Jordan Hubbard took the OpenBSD tree's variant. More likely it came directly from FreeBSD.

(Yes, I know that 'pf' started on OpenBSD.)
The original post by Parsons, which contains 6 items in addition to the 10 reproduced in the WSJ article, expresses the following as a term of reproduction: "You must reproduce the Rules in their entirety, with no changes or alterations."
The piece is badly out of date when Lion ships next month.
We're reaching a stage where banning somebody from all Internet access is over the top, even for crimes like this. This would prevent him from accessing online billing for utilities, banking, and many government services.

Some banks are even beginning to charge additional fees for services performed over physical mail.

Before long a ban from the Internet will be equivalent to a ban from electricity. At that point the criminal's life will be unreasonably disadvantaged, regardless of the scope of their crime (and this guy's crime is arguably less serious than that of the creators of StuxNet, for example)
What You Learned About Static Electricity Is Wrong
His method is a bit more complex, but you eventually need to describe how different frequencies change the characteristics of a system. Initially, it's nice to see impedance in terms of a + bi, but that's not easy to manipulate when you eventually want to know a circuit's behavior at various frequencies.

This is because (a + bi) does not inherently describe the sinusoidal behavior of AC. By changing things into the frequency domain (where writing a phasor implies a driving rotational force at some variable frequency), we can now see how the impedance of an entire system varies as frequency changes.

http://betterexplained.com/articles/intuitive-arithmetic-wit...

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

It's really just a math abstraction. Maybe this analogy is a stretch, but you interface with stacks using push and pop, and there's an inherent size to the stack that you keep in the back of your mind. You don't care about the individual memory addresses and their values, you just want to manipulate the stack such that it doesn't overflow/underflow. Just like AC - you don't care where in the complex plane an impedance is at a given frequency (which would be in terms of a+bi), you'd rather just see how its behavior changes as frequencies vary.

And why do you care about impedances for a whole range of frequencies? One example: http://www.ecoustics.com/electronics/products/articles/13106...
What will be the impact of this on mobile web apps? I'm assuming though that is still a rather long way off.
I didn't run an ActiveX control. I did it from my Mac. Granted this isn't Chrome on Ubuntu, but I would be very curious to find out what would happen if you have Chrome on Ubuntu report it's user agent as Safari on Mac.

It would be even better if AT&T could somehow be convinced to run the same code that runs in normal browsers anytime the user agent isn't IE. Even better if they could somehow be convinced not to even run ActiveX in IE.
San Fran vs Paris vs Sydney
Photo Battle #2
My mother, a sweet 75 year old lady who loves to share powerpoint presentations with her friends, has been using Ubuntu Linux for the past 5 years or so. She moved up from MacOS 9, which she used since she abandoned Windows (because I threatened her I would not remove malware from her computer again).

So far, she has been very happy with it. She is now using Natty and quickly transitioned to the Unity shell.

Every once in a while, I log in remotely and brush the machine's teeth. Never found anything remotely suspicious.
the original post cited it - their advertising made it look like bi-rite had already bought into the deal
For many materials, I think landfill mining is a lot more viable than mining from ores, both on the basis of high concentrations and on the basis of higher energetic states. I mean, you're not going to find native iron, aluminum, titanium, or silicon in rocks, and cullet is a lovely material for making glass from. And, in most of the world, you'll find a lot more platinum and tungsten in the landfill than you will in your local rocks.

Energy and helium are the only resources we're currently consuming. The others are just being reversibly transformed.

Mining landfills is dangerous work, but it can be automated. Mining in general is dangerous work, but I suspect that landfills are even more unpredictable than rocks. Landfills contain smallpox virus, polychlorinated biphenyls, HIV-contaminated hypodermic syringes, and so on.

I think that current landfill mining is limited largely by aesthetic considerations (and the resulting laws), not pure self-interest.
I am a magician. Or occultist. The title means nothing to me, as it is just a name. (I am also a regular on HN, but choose to register for a temp account.)

I am an engineer by profession. I'm paid to figure things out, and to make those things cheaper or more efficient.

I originally came across what the common person knows as witchcraft from originally studying Yoga and Tantra from the East. I was witness to television and in person the abilities of those practitioners. I watched, and am working on Tumo (the art of creating massive amounts of heat in the body). I have been able to leave the body, like a dream state but retaining full consciousness.

The more I worked on these earlier techniques, other things made sense. I slowly am now able to perceive energy around others, as well as can tell when people are being deceiving (it changes their color).

Maybe I'm crazy. I can accept that. I'll answer questions if people have them.
I hope that you will realize that, when I say this that I am not being a cynic: Your suggestion that people start thinking about what's what for the country instead of themselves is naive in the extreme.

It's quite possible that the people who would need to sacrifice in order to serve the common good are already among the less well off. Who has railroad track in their back yards now? Who is going to have more railroad track in their back yards after we build more track, presumably near the existing track. From a property value perspective, there's no right side of the tracks when you're a hundred feet from the tracks.

And who is going to benefit from enhanced rail service in the Northeast Corridor? Well, indirectly, all of us, but more directly, it's going to be rich people and upper middle class people who are shuttling between Boston, NYC, Philadelphia, and DC. (Baltimore too, I suppose.)

Someone (taxpayers, railroad companies?) really should compensate the people who will be getting screwed when new track gets laid, especially given that the immediate beneficiaries are not going to be the people who are in the crappy position of being asked to set aside their own interests and take one for the team.

More generally, it's not clear to me what "what's best for the country" means. That's what the political process exists to figure out. If the result of the political process isn't what you'd prefer, feel free to call it "unjust," but short of becoming a dictator and deciding what's best for people, the political process is going to be an unsatisfying experience for pretty much everyone.
http://www.economist.com/node/16636101
... outside Germany and Switzerland, Europe’s freight rail services are a fragmented, lossmaking mess. Repeated attempts to remove the technical and bureaucratic hurdles at national frontiers have come to nothing.
I wonder how much more bad publiciy it will take to torpedo the deal, or for MS to hit the pe guys up for a bit bigger holdback.
FAQ about the recent FBI raid (Pinboard Blog)
Somehow I don't expect the next 40 years to look a lot like the last 40 years.
You should try 1password. It really like it. It syncs via wifi or dropbox.
Only where AT&T is involved could we rush to the defense of IE6.
Grooveshark is pretty popular too.
> The principles of supply and demand apply just as much to the market for "smart and passionate labor" as "all labor".

The supply and demand curves can be proven to have an intersection under the assumption that they're monotonic in different directions. But with regard to "smart and passionate labor", that assumption is flawed. Offering people more money for labor doesn't necessarily enable more of them to become passionate about it. So it's entirely possible for the market to fail to clear.

That's not what's happening now, of course.
One example: given a file, you can create several different access levels. One group can be read-only, one group can have read and write but NOT delete, one group might only be able to modify permissions, and one group might have full access to the file, while "EVERYONE" has no access at all. Administrators, incidentally, need not have access beyond "take ownership" which is an obvious and easily-audited action.

These are all standard features in most ACL-based multi-user environments.

Unix file permissions don't use ACLs, so off the top of my head I'm not sure how you would set this up on Unix. For one thing, I am pretty sure w implies delete permissions. So that group can't even exist, and if it could, there's no easy way to have that group be different from the read-only group, and still have a no-access-at-all group.

I suspect most complicated requirements can be resolved with some combination of sudo and traditional permissions but it's not always straightforward and probably won't be exactly equivalent to the way you would do it in Windows.
To a degree, but anything powered by a candle is going to have a pretty low hot-end temperature, and thus miserable thermodynamic efficiency.
On a per passenger mile basis, the government subsidizes rail much more than it subsidizes highway use.
Mt. Gox UI is back up and Trading Should Resume Soon
...per Mt. Gox.

Mt. Gox is back up. Well, the UI is anyway. Real-time trade data is not yet appearing but opening bid/ask price is being shown around $17.5 USD/BC. All users have been required to reset passwords and go through an approval process before using the site post-relaunch. A few days ago when I reset mine, the approval process was quick and fast. But assumedly, a real human is approving (or at least monitoring) these submissions. So if you are scrambling to get back in just now, there may be a longer wait.

Purportedly, we will see the Mt. Gox market resume very soon.

I wrote earlier this week in my blog (http://jacobirw.wordpress.com/2011/06/20/what-will-happen-with-bitcoin-and-mt-gox-post-hack-im-bullish/).

I still feel this way and thus I will not be buying any Bitcoins until I can see a bottom. If options (puts) and short positions were available, then I'd be actively trading - but implementation of these strategies/features are likely on pause (or pushed out) now.
Perfect fit for Silver Lake.
I worked for start-ups from my first job on up to three years ago (that's 10 years, because I am old). I have worked 60, 80, 100 hour weeks sometimes. Each of the start ups in which I was an engineer were successfully acquired. The owners got millions in each case, I got a net payout over the course of four start-ups of about 15 grand. Not 15 grand each, 15 grand total. Sometimes I think about what a fool I was, and how much more money I could have made working for large companies at market rates, instead of killing myself for substandard salaries, even though there was some "love of the game" involved.

Why is it that we need to exploit people in this game? Especially young engineers or execs with their first VP experiences. Some people get rich, most people are pawns.
[benchmarks] MongoDB kicks MySQL's ass no matter the circumstances
A recent post in HN claimed that MongoDB doesn't scale well, because the performance drops after the indexes are bigger than the available memory.

Scaling with MongoDB (or how Urban Airship abandoned it for PostgreSQL) - http://news.ycombinator.com/item?id=2684423

I decided to put this claim to the test, so I set up an Arch Linux virtual machine with 128M RAM and wrote a quick and dirty benchmark test.
The test is a simulation of a simple blog with N user accounts and M posts per account. It creates all accounts first, then it creates the same number of posts for each account. The posts are not created in a consecutive order, and they are indexed by their "account_id" field.
Once all accounts and posts are created, the script runs a query to find all post per account for all accounts.

So this script does two things:
1. Writes a lot of records.
2. Reads all records using an index.

You can download it from Github and use it to test in your own environment:
https://github.com/naturalist/MongoDB-MySQL-compare

I used MongoDB v 1.8.2 and MySQL 5.5.13. My laptop is a Toshiba Satellite with Intel Core i5 @ 2.53GHz, and the virtual machine I set up was with 128M RAM, running Arch Linux.

Here are the results of my tests:

MongoDB
5000 accounts
50 posts each
using MongoDB's native _id

Create: 317 secs | 185.94 CPU
Read: 595 secs | 480.64 CPU

---

MySQL
5000 accounts
50 posts each

Create: 322 secs | 99.77 CPU
Read: 740 secs | 487.50 CP

---

MongoDB
5000 accounts
50 posts each
using an auto incrementing int for _id
Create: 252 secs | 112.31 CPU
Read: 520 secs | 218.29 CPU

So it looks like that MongoDB is significantly faster not only when writing but when reading too.
The above test completely exhausted the VM's memory and kept using the swap partition.

Next, I decided to really push the limits of both and ran the MongoDB test with 10,000 accounts and 300 posts each. That's 3 million records. It created the records in 3643 secs using 1831.45 CPU, and read the records in ~8000 seconds using ~3000 CPU.

MySQL could not complete the above test. The MySQL server froze and I had to manually kill the process and restart the server.

Disclaimer: I do not work for 10gen, I don't even know them. I'm just a guy who's considering MongoDB for his next project.