skysight-inc/HackerNews huggingface dataset:
It is more just a set of techniques for generalizing theorems. At this point in time I would say there are a few roadblocks to doing some kind of data-driven probabilistic search for inductive proofs (like ACL2 does). The first is that there just aren't that many generalization techniques already implemented to choose from. The second is that most provers don't even have the basic backtracking mechanisms built in to support that kind of behavior. Although this may seem surprising, the search space for a typical theorem is so huge (technically infinite, but practically speaking just too complex to bother with) that usually if you don't find a proof right away with a high-confidence technique, then you are probably just going to go off into the weeds.

Now that more processing power than ever is available, I'm sure this will gradually change. But a lot of theorem proving technology is very old (dates to the 70s) so it may take some time.

The main technique I came up with looks at a particular finite case of a conjecture and generates a proof for that case using simple rewriting. You then look for patterns in that proof and use them to create a generalization. As a simple example, imagine your trying to prove a theorem about lists. First, I consider the case where a list is only 4 elements. Since this is a finite case, I can prove this easily with rewriting. Now I look at that proof and notice that rule X was applied 4 times. If I do the same thing when the list has 5 elements, that rule is applied 5 times. So in the general case, apply the rule n times.

One novel thing about that I came across in this work is something I called "Hybrid proof terms". I found that it is very difficult to find patterns in sequences of terms (the typical way of representing a rewrite based proof). So I used this representation that factors out the things that do not change from one line of the proof to the next.

Feel free to email me if you would like to discuss any more details. I'm not really working on this project anymore but I still find it a fascinating area of study.

Also, for your friend who is thinking about working with ACL2, he should know that the acl2-help mailing list is quite friendly and helpful.
A couple notes:

- It might be a good idea to note stock:market divergences on your chart

- Don't know where your parsing your news, but you might want to incorporate a filter for SEC filings and PR releases along with a way to eliminate the fluff/SEO (Motley Fool comes to mind)

It seems (as blurry pointed out) that you are assuming that news leads/lags a stock. There's also a whiff of efficient market theory in there, and at the expense of pissing off half of HN, the markets aren't efficient.

Other than that, I find a hard time finding the difference between what you have and other tools I use.
If we could all agree to use a messaging app that bypasses the traditional SMS app, we could do this ourselves!
Google Analyst: “Worst Economic Environment In Our Collective Lifetimes”
Your "blog" (I hate that word:-) is empty, and yet it's linked from the site. Either put something in it, or get rid of the link.
PeaZip: Robust But Easy OSS File Management, Compression and Archiving
I think it's a silly comparison you're trying to make. "DLL Hell" is "Hell" because there's a system-level depot for binaries that is hard to override. If you really need multiple global gem depots, just run multiple builds of the same Ruby.

The first thing every team I've worked on has ever done with Ruby (and Python and Tcl before that) is roll a project-specific Ruby build, so that nobody is working off the polluted system Ruby. It was even worse with Python, which for a couple years was a whole major version back from mainstream Python.

I'm not saying there isn't a real problem here; if you're hosting apps for 3 different teams, you do have to do a little dance to deploy seamlessly for all 3 of them with all their deps.

But most teams are never going to run into this problem, and I don't know of a really elegant solution for it.
Well if the gov't wants to act as a private equity firm, so be it. Buy them and then chop them up and sell to other companies. Their parts are worth more than the whole.

Also, if you want any sort of green-innovation in the car industry, they have to go.
New computers are coming with gigabytes of ram, I have 2. On the other hand, I rather enjoyed watching a quicktime crash take down only 1 tab. I kept loading it repeatedly.
Now you're just dancing around. Your comment is right there at the top of the thread. All you're convincing me of now is that you'll never concede anything in a discussion, which makes you pretty boring to talk to.

Some other time, maybe, Alex.
Stock/market divergence is marked on the chart with a green dot, might have to make it more prominent.

What do you use to filter out the news?
Is it adultery if it happens in a virtual world?
No I can't. That would be simply ridiculous. The thirst for power is not infinite. At some point, most people will have enough power to do everything they need (Unless they're using say windows, which will always require 10 times more computing power than the previous version).
Everyone else in the vicinity of the smoker chose to be there, knowing that person was smoking. Back when it was legal, there wasn't some great mystery to it; you went to a bar where smoking was allowed, people were probably smoking. It's not like they waited for nonsmokers to fill up the place and all lit up in unison, attempting to lower life expectancy by a few seconds.

The smoker is smoking; a poor decision that affects them. You're in a smokey bar; a poor decision that affects you. The only difference is the smoker isn't complaining. There's no sense complaining about a situation one puts themselves in; there's even less sense in making laws which attempt to keep people from putting themselves in said situations.

A private establishment could force compulsory games of Russian Roulette for all I care. As long as there's a sign on the door.
Um... you consider a chip maker, telling you that you need to buy new chips "legit"?
I like it, I'd probably at least play around with it or integrate it if I found a use. Great work!
Are there other things you can chart and correlate news stories to, besides the stock market?

Can you put in the extra effort to chart indicators, like VIX and TED and Case-Schiller? CSCO and MSFT stock charts might be tapped out, but this might become useful if it acts as a portal to lesser-known stats.
Innovation isn't just product quality. A lot of the most significant innovations come from process improvements - which is why it takes so much less time and cost for Toyota to produce a vehicle than GM.

As for health care, we'd all be a lot better off if the health care system in the U.S. had some process innovations. However, there's so much bureaucratic red tape that not many people want to tackle that job.
If the government could bend the rules and allow them to renegotiate labour contracts and healthcare without declaring bankruptcy, that should be option #1.

If these companies are still straddled with the nightmare of these obligations, no amount of government money will save them in the long run.

Government run "innovation initiatives" are fraught with the same problems as a government owned company (moral hazard, non-market competitive landscape, distorted incentives) and should be considered equally inefficient. Nothing can match the innovation that could be achieved by allowing these companies to be broken apart (a process that began 30 years ago when Toyota started achieving success using standard, outsourced, intermediate goods). Breaking these companies up would create a competitive framework for smaller players to enter. Think about what could happen if you could start a car company without having to hire a single assembly-line worker? It would be like giving the car business a set of APIs.
I thought a black hole was an object sufficiently dense as to have an event horizon.
I did read it. The AP gets it rougher than the IBO. But maybe I'm not used to reading Academic-ese, because it didn't seem to me that they were taking a complete shit on the AP.

In any event, I don't disagree that the AP and IBO need work, I just haven't seen a proposal for what we should be doing instead.

(Maybe if those people learned to say what they mean directly, the non-academic advocates of school reform would have an easier time sorting things out.)

A lot of the AP course problems seemed to stem from the 'teach to the test' mentality, which occurs because college admissions and school rating agencies use the test results in ways the Collge Board/AP did not intend, so schools and teachers are rewarded by gaming the system.

In that respect, almost everything bad you can say about the AP or IBO courses can be said about regular classes thanks to NCLB. At least where my children attend high school, about 2/3 of all classes suffer from the same issues as AP classes, due to the need to put the kids through the state testing grinder.

In that context, the difference between the two is that the AP classes, at least in math and science, while far from ideal, do expose the students to more advanced concepts than they would encounter otherwise.

So, given the choice between AP classes, and non-AP classes that have the same fundamental problems except the course material is easier, what would you do?

I expect your answer is neither, and you would propose something else? Do you have pointers to that info? I really am curious.
> Intelligence is general and is capable of coping with
> novel problems. AI therefore invovles building machines
> which have that level of generality.
>
There is a bias when you think of "programs" to think of programs that a human would actually write or consider useful. But in fact, this is only a tiny (and nontrivial to specify) fraction of the space of "possible programs" - see for example _Foundations of Genetic Programming_, by Langdon and Poli, for some next explorations of general program space. Most possible programs are completely useless and uninteresting to humans (same with proofs, grammars, etc. etc.).

To do AI you have to realize that in the sentences: "Humans have general intelligence and can solve problems in many domains" and "Breadth-first search is a problem-general technique that will always find a solution if one exists" the word "general" does not mean the same thing at all! (cf. the huge literature on inductive bias in human cognition).

For a nice list of program induction problems solvable by search (with a system called ADATE), see http://www-ia.hiof.no/~rolando/Examples/index.html .
Amazing. Seriously, I have always wondered why isn't the solution for all the financial worries of startups and the VC play.

This is the "change" that would make a lot of things easier, ensure startups keep up their momentum and not waste in VC fund raising process. More you have angels who are truly angels backing founders. (I understand this can hurt lest rational thinking is lost)

Micro financing at angel level (be it 5 friends/colleagues or more) is great. Someone needs to institutionalize this or have some learnings on how to deal with accountability, resolving dispute and the like.

For people in India, Israel, Ukraine and the rest of east Europe the startup costs are quite low. $100K is like close to upper end angel funding.

I know of at least 6-7 ex-Trilogy startups in India - brilliant guys, doing it right, when it comes to funds Indian VCs are most risk averse they wouldn't invest in anything other than jobs, matrimony, real estate and travel. I have always wondered why would it really bother for couple of ex-Trilogy in US to invest. For 2 guys to put something like $50K it would be hardly anything.
Here are my observations for the page http://whomovedmystock.com/GOOG

1. it looks pretty

2. when I move the bar at the bottom of the chart, the applet keeps reloading. This is annoying. Is it intentional or a bug?

3. the bit at the top left where it shows a pie chart of Google's "Market index allocation" -- how is this calculated?

4. On the chart, it's not obvious to me what the blue line "market index" means
In other news, Microsoft announces that UNIX is dead, so it should not be taught anymore.
Apple’s enterprise strategy the same as it ever was
From the conversation buildup it looks like these requests (use Smalltalk, Lisp) were common at Google, thus could be responded to with "precomputed" no (i.e. it was not the first time VP had to ponder the request).
good points. Maybe I need to try another client like Tbird. The multiple machines is a no-no believe - I one time rec'd a gmail message along the line of "too many connections".
I usually ignore the news during the trading day, and I use stocktwits.com for a pretty good feed.

I'm not saying your site won't work: you can carve out a pretty good niche in finance-world.
Only when you zoom in or out the new events are either loaded or filtered out. When you just move the bar it should not reload. If it does it is a bug.

Market index is the best weighted average of the market/sectors/industries that matches daily price movement of the stock that we can find.
what needs to be created is a bit-torrent type affair for people to consume video over the internet, such that users logged into a network (let's say youtube) download and also share the videos they consume.

this will reduce the overall bandwidth cost for the service a ton. plus it reinforces a community of sharing, people actively downloading and hosting/seeding the videos they enjoy. give premium access to the users that host/seed more.
Why Cisco and F5 love VMware and Microsoft
Sure, it will make things better because in a couple more years the economy is in recovery and can absorb the shock better,

It's not like the government isn't planning to extend unemployment benefits because of the economy.

If GM goes bust now then more people will be on the dole for longer.

The tax payer pays for it one way or another.
Thanks for being a ruthlessly honest dick.
We could call it "The Constitution of the United States of America". That has a nice ring to it.
i'm so confused after reading that.

i don't even take my real life as seriously as they take their virtual lives...
Major Breakthrough: First Photos of Planets Around Other Stars
It sounds like the members of the class are the companies which bought directly from the manufacturers. For instance, Dell buys LCD displays from Samsung to rebadge. So if Samsung were a guilty party Dell would get some of this settlement but I would not, even though as Dell's customer I bear the final cost of the price fixing :/
What makes a language "pedagogical"?
If you want to talk about events that have a profound effect on stocks, it would be tremendously useful to add trading volume high/lows to your charts. I don't mean trading volume in general but rather exceptional events, like a hedge fund or an institutional owner unloading a bunch of shares for example. You could compile a history of NYSE Arca trading spikes/dips as one source (http://datasvr.tradearca.com/arcadataserver/JArcaBook.php?Sy...) and there are probably several others.

Those are true movers and would add tons of credibility to your tool by showing what I'd expect to be a near 100% correlation.

Another not-so-crazy crazy idea would be to plug amazon's mechanical turk worker bees to track stock mentions on Jim Cramer's Mad Money and plot that into your charts. I am not suggesting this for the actual usefulness but rather as a gorilla SEO/marketing trick. I once consulted for a company that does online doll dress up games and it occurred to someone to create a Hannah Montana doll. That basically made them. Little girls search for Hanna Montana, see the Hanna Montana dress up game, and voila, they go from several thousand to 2MM+ registered active users (with paying parents) in several months. I really think Jimmy C could do the same for you.
Leaving Halo Wars for a Chess game? I guess that works.
Disk Based Backup and Disaster Recovery for Small Business
But what if you can't agree on a decision, but you could live with one partner having the last word?

Say we agree on you taking the 51% side, then I have to think up front if I can live with you winning every time we can't agree.

We'll be agreeing most of the time and if I'm an adult I can live with the occasion when we disagree but you have the last word.

The worst case scenario here is that over time I can't take it and refuse to participate.

That's pretty bad, but the worst case scenario with a 50/50 split, is paralysis thus guaranteed failure.

I am not saying 51/49 is fair, I am saying its wort case failure mode is just a bit better then the 50/50 split worst case failure mode.
I guess I'd have to side with the libertarians on that one. Yeah, it's some kind of ugly market failure, but SMS's aren't an essential service to which people have some kind of claim in a caring society, like food or shelter. Jacking those prices up is all the more incentive for people to jump at the first thing that approaches the true marginal cost of sending data.
I worked for Enthought (the people behind SciPy, and now NumPy, as Oliphant works for Enthought, as well) for several years when I lived in Austin. Nearly all of the guys that work on SciPy and Matplotlib came from using Matlab in some capacity or another. I've never worked with Matlab, but from the examples I've seen, I much prefer the Python version of things to the Matlab version.

I'll also mention that SciPy is in use at some of the biggest companies in the world, and because of its stronger programming language base, it can be used for much larger problem sets than Matlab. Massive fluid dynamics computing projects, requiring clusters of machines, for example, is feasible (and being done) with SciPy. Likewise for geological data analysis. I don't know anything about parallelizing Matlab, but I'm guessing the possibilities are much greater with Python.

And, of course, Python skills are probably more transferable to other work.

I don't see how you could lose by trying SciPy. It's free, has a great community of incredibly smart people (it's the community with the highest ratio of PhDs to others that I've ever been a part of), and is fun to play with.
Datasets for Data Mining and Knowledge Discovery
reading the title, i thought, oh cool, this will tell me which investment firm(s) are buying/selling a particular stock.

as others have pointed out, this doesn't provide anything more than what google finance already does.
The money is in niche sites; instead of trying to cater to every demographic, cater to specific niches.

Suddenly, your ads are worth far, far more, and furthermore you can build an actual community based on specific interests rather than lumping everyone together.

I predict that over the next 5 years or so, online video will branch out to create an enormous "long tail" of niche sites that massively out-traffic the top few (Youtube, etc).

Also, I don't think bandwidth is as big a problem as people make it out to be. Sure, if you pull a Stage6 and solve quality problems by simply letting everyone use bitrates as high as 18 megabits, you'll run out of cash fast. But with modern H.264 video, 500 kilobits is plenty for web-quality SD video.
I started with the data modeling world with RDF, so I do not have a lot of great info here.

At some clients I have been to, they worked on a data warehouse schema in a star schema format that acted as a master and in some places the abstract model just lived in people's heads. My previous job was like that. These are people that ended up using RDF/OWL to put this into an ontology to get a better grasp on the abstract model.
Common Visual Design Misconceptions
Questions and answers from the third online Webmaster Chat from October 22, 2008
Fisker Automotive Opens Engineering Center Near Detroit
No one will let GM die, especially not a Democrats controlled congress and a Democrat as president. They owe the unions for the votes and no one is brave enough to tell GM -- whom people have worked for multiple generations and who in turn have been taken care of by the company -- to go die. We'll just going to hand them money.
Yeah, it's stupid. From their presentation: "This is a post exploitation type attack, that requires administrator level privileges." By then you're owned so who cares?
> Startup idea wouldn't really work, it costs way too much money to bring a car to market, and there aren't that many startups in the automotive space, Tesla is pretty much it.

I think that I you set up a incubator with $200mln for pre-seed VC, with a priority for potentially labor-intensive and/or automotive businesses, you'd see some significant job creation. Not enough to offset GM layoff overnight, but at least the solutions provided will be sustainable.
the graph doesn't look very professional/serious because of the curves in the change of the direction.
It took several minutes of playing with a chart and exploring the contents of the page before I had that 'aha' moment when I realized what your site is trying to do. (example: whomovedmystock.com/goog)

From the questions in the comments here on HN, it seems clear that everyone else is in the same boat, not really getting why this is any different from google finance.

You need to experiment with better visual ways of communicating that the blue 'market index' curve in the graph is something you invented, defined by the pie chart to the right.

It also wouldn't hurt if there was some unobtrusive way for you to emphasize why that's important. You're trying to isolate market movements out of stock movements, so that you can correlate news with times when the stock diverges from what would be expected based on the market and the industry/sector it's in. To me, that's great, but neither your intention to do that nor the effect of everything you've done to try to illustrate that is quite coming across.
Programs are equivalent to proofs given their correctness, rather. Additionally, according to the wikipedia article, extracting a proof from a program requires a very richly typed programming language.
The Hedge Fund Disconnect
Very true, not to mention the S/N ratio of Digg and Slashdot traffic (especially Digg traffic) is really pretty horrible.

My personal experience (3 slashdottings about 5 years ago, 2 diggs and a techcrunch in the last year) are that those traffic spikes have very few nuggets of valuable hits in them.
CINGULAR BLACKBERRY 8800 (UNLOCKED)
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If nothing else it's a much better way of spending money than a war.
Space Telescope Science Institute (they run Hubble under a NASA contract) has contributed to development of numarray and numpy.
What about it? (warn.: not an EN speaker)
it costs close to 1 billion dollars to setup a factory to produce a single model. The only reason Tesla is able to do it for a 1/4th of that is because they aren't doing mass production, and their vehicles are using Lotus Elise parts. So the 200 mil will be a drop in the bucket in the auto space.

And even if they did that, the job creation will do no good to the typical worker whose family worked on the same assembly line for 3 generations. Granted some of the jobs will be back when Toyota or Honda or some other successful car company buys GM's assets. But GM is one of the biggest manufacturers in the world, and right now there isn't really that much demand for new cars. I read that last month Honda(whose stuff pretty much flies off the shelf) sold 25% less cars than the year before.
Ask HN: What's the fraction of lurkers vs active users?
In your respective blogs or collaborative sites, what is the proportion of "lurkers" vs the number of active users?
By active I mean creating content in one form or another (commenting, tagging, etc...). I imagine this information would be useful in planning how to monetize sites that depend on user collaboration and participation. Is there any larger scale data on this?