skysight-inc/HackerNews huggingface dataset:
Additionally, touch on a few other really useful methods for approximating solutions and decompositions, namely: partial pivoting, Householder reflections, Givens rotations, and of course, the Power Method.

Additionally, SVD.

We covered these pretty thoroughly in the Calculus 3 for Computer Science class here at Georgia Tech, and they're relatively easy to learn and are fairly useful.
That's a way to protect the trackball if you lay the phone face down on a flat surface. On the G1, it is not that pocket unfriendly.
Brad Feld's post: http://www.feld.com/wp/archives/2007/11/dont-ask-for-a-refer...
It is hyperbole, certainly, but I think the conclusion that Apple needs Jobs is the correct one.

One point Lyons does not make is that the brilliant team that kept the ship running smoothly while he was gone were all recruited personally by Jobs. I've written before that recruiting brilliant people may be Jobs single most important skill. I am sure that Apple will need to continue to recruit brilliant people in the future in order to sustain its current level of success.

The point Lyons makes about all of his contacts, emails, etc. on his new phone before leaving the store should not be underestimated, either. This kind of thing is part of the culture of near-insane attention to detail established by Jobs. Apple comes close to removing the fear of learning, configuring, and migrating to a new piece of technology. There has always been a certain nagging dread of what can go wrong when updating to a new Windows OS. Even if its better than what you have now, the expected pain leads to putting off the purchase. It might be possible to sustain this culture without Jobs, but I and other Apple shareholders don't want to find out.

Lastly, I do not think this is true of only Jobs, but founders in general. I don't think Microsoft is the same company run by Ballmer as it was under Gates. Without Jobs, Apple became the definitive case study of how a company can still lose with superior technology. (I know there are other examples of companies losing what made them successful when the founders left, but I'm drawing a blank on remembering them right now.)
Bing, Google Squared, Wolfram Alpha, and Google Wave reviewed
I disagree with you on trig. Trig is the study of straight lines and what you can do with them. The important part of calculus is the fact that you can approximate curves by straight lines [1]. A folk theorem in applied math is that 90% of the time, an approximation by straight lines is good enough (another 9% of the time, you'll need a parabola).

You can drop some of the petty stuff (x,y,(180-x-y) triangles), but don't skip the basics.

I'd also suggest skipping rings/fields since most of the algebra important to CS involves structures weaker than groups (semigroups and monoids). Also add graphs/combinatorics to your list.

[1] This fundamental fact is briefly mentioned in a subsection called "differentials", and otherwise ignored by textbooks.
I'm hoping for a future where hacking your own device so that it does what you want it to isn't some kind of legal gray area (and isn't illegal either).
This naive view that only the leaders, not the people that design and create the products, is the kind of stunted thinking that led us into this recession.
Hoping that the industry and community will adopt better technologies is fine, but did you seriously think they wouldn't adopt the format that YouTube uses? Further, do you really fault them for it?
I agree with you that a market for this may not exist, or hard to find.

But, as a fellow entrepreneur I can see that they found a problem (maybe personal) and tried to solve it. I know women that are trying to get pregnant (yes this is an problem) and want to know the best time for it. Would they use a service like this? I actually asked a few in the last few hours, here is what I got back:
"I wouldn't want to share it on a site, maybe if it was just on my computer"

"It would need to provide more functionality then to just track my cycle - seems like a feature to some other sites"
Muziboo: Share Your Songs With the World (useful tools review)
"Apple II, Macintosh GUI, Pixar, iPod and now the iPhone"

Have to admit, that's one hell of a score card.

Gates can take credit (as much credit as Jobs gets for above) for Windows, Office, and XBox. Then I'm sure Thomas Watson gets credited for some insane amount of stuff during his time running IBM.

Any other technology leader deserve to be in the above conversation, in terms of overseeing products with an outsize influence on the industry?
When you already have interesting people coming to speak, why don't you make a separate short interview or summery and publish? Would be great both as a promotional thing and as a "log" for the ones who were there.
The video answers your questions, though, so I'd highly recommend you stick through it if this is a topic you're at all interested in enough to inquire about. It's harder to explain in a convincing way and if the video doesn't excite you then our descriptions absolutely won't.

There's only so much of "new way of collaboration and communication" buzzspeak you can read in comments before it sounds like the same ol' thing. When I saw the video, it really hit home (for me) how this could really improve how I collaborate with my company (and friends) online. If the client, especially, is done right, that is.
The actual paper states:

"Analyses of her chromosomes and DNA have thus far yielded normal findings. Nonetheless, the data suggest that spontaneous mutation of the gene(s) directing normal development occurred and that the difficulty in identifying it (them) may be due to assay limitations and/or the extent to which analyses have been employed."

Richard F Walker, Lawrence C Pakula, Maxine J Sutcliffe, Patricia A Kruk, Jesper Graakjaer, Jerry W Shay.
A case study of “disorganized development” and its possible relevance to genetic determinants of aging.
Mechanisms of Ageing and Development, Vol. 130, No. 5. (May 2009), pp. 350-356.

http://www.sciencedirect.com/science?_ob=ArticleURL&_udi...
Plastic packaging as energy for soldiers
Bordering on off-topic, isn't this why YouTube needs to support more output formats?
I am the author of the Javascript solution which you ported from. The code itself was a modification of the one in openCV ( its not a direct port since I did some optimizations to speed things up ). However, the dat file was generated from one of the Cascades trained using the openCV haar training program. To summarize how it works:

1, the algorithm use something called haar filters, its simply box filters with a "White" and "black" area
- for each region of the image, you take the sum of the pixels in the "White" area and minus the sum of the pixels in the "black" area. Thus the filters output a simple single number;

- First you generate a gazillion of these filters for different regions of the image with different shapes. such as a 2 horizontal rectangle or 2 vertical ones ( one black and one white ).

- You take the result of the output of the filter to find the threshold which differentiate the faces and non-faces in your training images the best.

- Using all the filters and outputs you have, feed it into an machine learning algorithm called "Adaboost", which attempts to minimize an exponential loss function of the error of classification. These different filters are then assembled with different weights.

- The final structure of the detector is a "detection chain", which is a degenerate decision tree (like a chain) with nodes consisting of the aforementioned filters assembled together. This is how the algorithm achieves its speed, by rejecting non faces early in the detection process. Only when a image region passes all the nodes in the detection chain that its labeld as a "hit";

- After that you scan all regions of the image at all sizes ( brute force ) and then assemble the detection results.

To be honest, the first time that I saw the description of the algorithm, it seemed a little "magical". The underlying reason why these "box filters" work so well is because the human face is well-defined by "boxy" feature such as our eyes, nose, eyebrows, lips..etc. Its a wonderful wonderful application of Machine learning to a specific domain.

This is also why this algorithm has MUCH lower detection rates for cascades trained to detect side view faces, because these "boxy features" that are so well detected by these filters are simply not as prominent in the side view

For more, refer to the Viola and Jones paper , of all the versions out there, I find this the best:

http://lear.inrialpes.fr/people/triggs/student/vj/viola-ijcv...

to be perfectly honest, this detector sucks.... Although its fairly illumination invariant, its not rotation invariant and sucks for side-view faces detection. I've been trying for the longest time to implement the histogram based detector outlined in this paper: http://www.cs.cmu.edu/afs/cs.cmu.edu/user/hws/www/CVPR00.ps

which is also what pittpatt uses for their detector and IMO its a much better detector. However the lack of training images and time has been impeding my progress. It'll be opensourced when I'm done.
Never having taken a Linear Algebra course, this is the math I've been working the hardest at learning, and absolutely agree it is indispensable for understanding many things (in my case, machine learning). Anything that makes this easier to learn or remember I welcome with open arms.
That sounds like a really smart idea. Something like a blurb on X's advice for startups...
here is a demo from Adobe about flash, http://www.adobe.com/devnet/devices/articles/htchero.html actually it looks pretty cool to have flash in your browser, hulu?
Your error message about unsupported browser (I assume that's what it is) displays in Italian but the rest of the site is English!
It seems to be like it'll be sell unlocked from HTC.
An intriguing approach to bringing the virtual into the real. But I think it's going to need some more work before it does real "bridging" - rather than just gawking.

Keep in mind that the project was developed as art - not back-and-forth communication per se. Let's see what some creative hackers can do with it.
Mob Wars CEO: Twitter Is Run by Hippies
Well, it also helps with hand contour. And it makes it easy to identify the phone's orientation by touch.

And it encourages you to put the phone in your pocket the right way around... If you read the G1 user manual (yeah, yeah, I know), there is a curious passage advising you to keep the back of the phone 1.5 cm from the body.
This is not necessarily based on his code, but the way I believe Viola-Jones Adaptive Boosting works is as such:

1. Run the adaptive boosting code which creates a complex decision function using known positive and negative data.

The code creates what is called an Integral Image from each piece of data, and runs it through the algorithm.

Each iteration adds or subtracts a 'feature' from the decision function. So in the end we build up a general detector for faces. The algorithm only keeps the features which work best together not individually, so in the end you have the best 'team' of features.

Essentially we are training a function so it can decide what is and is not a face. This is likely what the .dat file output was, a descriptor of the resulting decision function.

The more data used to train, the better the decision function will be.

2. Run the decision function against unknown data.

Ta da, an answer. It could be right, it could be wrong. Sometimes these algorithms find faces in the darnedest places like walls and other textured surfaces.

For more info on Viola-Jones adaptive boosting check out the original paper:

Robust Real-time Object Detection
http://research.microsoft.com/en-us/um/people/viola/pubs/det...
This is a great comment! This is probably the best articulation of why

"good code is an asset, and it's a compounding asset, and the effect is exponential and not linear" - good insight, well articulated

"running IRR" - definitely right. I think you can apply different variables to the various categories of work.

Summarizing, the main thing, whether outsourcing or in-house is to find people who can write great code. On my end, understanding of the space you are in is very important as well
EA's new motto: please pirate our games... er, storefronts
Center of Mass (or just sheer bulk) would surely become an issue though.

Just because I can lift 1000kg of heavy material - doesn't mean that I can life a big box that weight without tipping over. (Obviously you could make the suit incredibly heavy - like say as heavy as a forklift - but it would become pretty inefficient to try and move around)
Mozilla working to defend web against XSS attacks
Agreed. Red or pink might be the wrong color considering the obvious association.
Isn't the argument for taxing height not that it better captures the effects of someones advantages, but that because it is taxing something you cannot control, you are removing the disincentives created by taxing something that society may want more of (income).

So while height taxing a more blunt instrument than income taxing, it doesn't distort people's choices in the same ways and avoids some of the deadweight losses. Unfortunately it probably will end up distorting people's choices in new and creative ways that we'd probably only find out about later.
> Apparently, tall people are more productive than short people.

Or, having (fallible!) humans doing the hiring has created certain inefficiencies in the labor market; inefficiencies which could be exploited/corrected by someone clever.
It isn't so important that Civ gives a very wrong idea. What matters is: Would it give a better or worse idea than a book or some conversation?

Which of these is best probably depends on the child: the game is likely to be less factual, and probably less insightful, but it will typically hold the child's attention better. That counts for something.
Argh, they got the clock wrong again. The video shows the time as 10:08, but the clock widget displays 10:23.
What is a "work for hire" and how does it affect my startup?
Can't find any info on the price on Google. Any idea how much it'll cost? (in Europe, Asia OR North America)
Excellent technical description of how this works. :)

I think I still have access to some data if you need it, but I agree there isn't much to be had. If only Facebook would open up their API for us to snag faces from user's photos using the tagging/notes system.
Oddly enough, I will start with "Adding Fractions" and basic algebra (expanding, factoring and simplifying)

It's not odd at all to start with adding fractions. I've seen multiple questions on Usenet over the years from programmers about how to write a generalized routine for adding fractions. Many people don't learn the simple algorithm for that

http://math.berkeley.edu/~wu/fractions2.pdf

http://math.berkeley.edu/~wu/AE3.pdf

http://math.berkeley.edu/~wu/EMI2a.pdf

and it is good to look at the common site of all the links I've just posted for more links with tips on teaching the most fundamental math concepts.
Macintosh GUI was pioneered at Xerox PARC, not at Apple. But Steve was smart enough to see the value in it and bring it into the marketplace with the Lisa. The Lisa flopped, and over in another building there was a team developing Macintosh. Steve got involved and the rest is history.
This is a pretty weak argument to be making. There's no specific reason to provide for a transfer of wealth from tall people to short people, it doesn't provide any specific social benefit.

At best this is some kind of amateurish Libertarian raving, or a thinly veiled troll.
Knuth, "Concrete Mathematics". It covers a lot of ground, in a fun (for me, at least) way.
Can someone post performance tips for Python? Either links or just suggestions. I've been coding in Python for a couple weeks and I'm not sure about what tools I have at my disposal for identifying bottlenecks and subsequently how to address those bottlenecks.
Do the 'faces' in walls and other textured surfaces actually look like faces? That would be interesting to see in action...
using tinyurl to hide your amazon referral url... nice
The "oh shit, am I pregnant" case saves women the trouble/worry/expense of using a pregnancy test. Similarly, basal thermometers/ovulation test kits are expensive and annoying. This service occupies the space between "just hope for the best" and "go to the drug store and start worrying."

Incidentally, while a pregnancy test will tell a woman if she is pregnant before the period, she has no reason to worry until a day after it should have arrived (ignoring condom failure).

Why would any woman use a simple and easy cycle tracking service when better methods are available at the drug store? For the same reason you might google someone rather than paying $50 for a background check.
Summary: (.9)**10 = 0.3487

(Ten 90% risk-free items = 35% risk-free = 65% risk)
For the child who plays games throughout the school year, a summer program in which the child meets a new peer group face to face is a very good idea. At some summer programs, computer games will be banned, but they will be a topic of conversation anyway. Many math summer programs

http://www.ams.org/employment/mathcamps.html

are essentially free to participants, as they have heavily discounted list prices for everyone, and lavish need-based financial aid.
I'd love that, especially after working with Ruby on Rails and C# and .NET MVC.

Going back to Java after those is almost painful it's so tedious.
If Android Flash is as bad as it is on the desktop, it's game over for battery life, browser speed, and memory usage.

I just hope it doesn't get forced down our throats (i.e. installed by default) and that if it is forced on us, there is a simple way to cleanly and completely remove it.

On an interesting side note, does this beast support AIR?
That's in case the battery goes boom. The bend at the bottom is an absolute dealbreaker for me.
SSN Required To Buy Palm Pre
Why do you think that would be against Google's ToS? I wouldn't guess so.
Disclosure: I enjoy playing a certain MMO. I really enjoy it. It's a primary hobby of mine along with motorcycles, hiking, and (other) video games.

I think a large part of the appeal of MMOs is that they provide an easy artificial hit of accomplishment. Self-growth is measurable in an extremely concrete manner. At the same time the effort involved is much less than is required for most 'real life' accomplishments. All you have to do is show up.

When you combine a dose of accomplishment with easy access, fantastic realms, and social interaction the appeal of the game becomes extremely strong. As a replacement for TV I think MMOs are a healthy improvement, in moderation. The underlying focus on personal improvement is a far sight better than watching Al Bundy's latest exploits, or the sensationalism and fear-mongering of the latest news special.

I recently moved to Seattle, where I knew one friend from college and had several online acquaintances. By hooking in to their social lives I now have a healthy amount of social interaction. My list of friends here would be much thinner if not for these online encounters.

Certainly there are more productive ways to spend one's time than to play video games online. But there's nothing wrong with kicking back and quaffing a virtual ale with a few friends.

My thoughts on this subject are still undergoing rapid evolution. My embryonic project which I want to develop into a startup is taking some of these ideas and running with them.
Because, as I explained in the post, that wouldn't really help people with the first edition.
Am I the only one who noticed that they didn't pay the promised $50? Despite multiple promises of reward.
It already does, but not overtly. The current iPhone YouTube app doesn't read FLV, YouTube re-encoded its whole video library to get on the iPhone.
If you're from a disadvantaged background, but put as much effort as a person from an advantaged background, then you would make the same after-tax income.

I think this misrepresents the notion behind progressive taxation. I'm no expert, but I understand it like this: because of declining marginal utility, the same % of income may mean much more to the poor than to the rich. If my yearly income is 10k, then 10% of it might mean the difference between making rent or not. If I make 100k, 10% of it may mean forgoing some luxury, but needn't substantively impact my overall quality of life.

In that sense, the subjective impact of money is not fixed by its objective value; it's more important to those that have less of it. This is borne out by research. Money significantly impacts happiness until you make enough to basically get into the (lower) middle class, and then it has little impact.

So, if you buy the above intuition and want to use taxation to help maximize happiness (utilitarianism), then you would want some form of progressive taxation in order to alleviate the negative impact of poverty. This doesn't mean "making everyone equal."

To test our intuitions about this subject, I like philosopher John Rawls' conception of a "Veil of Ignorance." Rawls would ask: would you rather live in a society with, say, 1% billionaires and everyone else in poverty, or one more evenly distributed around a middle class -- without knowing in advance where you would end up in this society? The answer may well depend on one's level of risk tolerance, but I'd wager that most people wold opt for the latter.
Instead of starting your own, why not contribute to Wikibooks? It's already an established site with a fair number of users, but there are several sections (especially technical areas) that are incomplete or haven't been updated in years. Plus, everyone else would be able to start contributing NOW.

http://en.wikibooks.org/wiki/Wikibooks:Mathematics_bookshelf

http://en.wikibooks.org/wiki/Wikibooks:Computer_science_book...
ZeniMax Media Acquires id Software
Mein Leben!
If the author keeps his raw notes in the proper way for a nonfiction book manuscript, the publisher can't undermine him in the claimed way.
gmail next?
The version used in Roadrunner is different than the ps3 one. It uses the same instruction set but can perform ops on doubles much faster.
The Government has a database for most everything
An example of someone building and maintaining free binaries for a paid binary was Xchat-2 for windows. It seems officially they stopped charging for the windows binaries, but when they did, someone was maintaining free builds that ranked second to the Xchat page on google. Not that they were banking on people paying for windows builds though.

So it may or may not work out how you hope.
Good stuff, this must be a relatively new section.

I've also found Yahoo UI and performance section a great resource too. For better or worse, Yahoo! apps tend to be heavier on the design and graphics side so they have some good practices in place.

http://developer.yahoo.com/yui/
I would like to suggest the following books from

http://www.artofproblemsolving.com/Books/AoPS_B_Texts_FAQ.ph...

Start with following two books

the Art of Problem Solving, Volume 1: the Basics

the Art of Problem Solving, Volume 2: and Beyond

These will give you a solid grounding in mathematical problem solving.
In related news, the same court has issued an order requiring all ISPs to prevent their customers from filesharing any copyrighted material belonging to the RIAA or MPAA; ISPs must spray their routers with the magic pixie dust that the court knows the ISPs possess but which they deny having.
The arrogance of some companies and their demands for personal information that has nothing to do with the business at hand is astounding. What's even more amazing is the surprise and inability to cope with customers' questions and refusal to give them the information.

My breaking point was reached when the local Snippets -- a franchise that cuts kids' hair -- demanded my phone number when I came to get my son's hair cut. When I asked why, the answer was "we need it for our system." I surmise that they want it for some sort of customer tracking database to use as a unique ID, but my refusal threw them for a loop.