skysight-inc/HackerNews huggingface dataset:
Armchair analysis of his algorithm after watching his TED talk: a version of LSA that uses PageRank instead of a straight SVD to calculate rankings.

LSA[1] has been around since the 80s and is used in many applications from GRE testing to Apple's junk mail filtering[2]. It's used a lot since the patent expired, it's relatively good and can be computed quickly. Of course, a lot of text-retrieval research has happened in the past few decades, one of my favorites being LDA[3] which relies on a much more sound statistical basis than finding lower-dimensional representations of term-document vectors. Unfortunately LDA's model is not directly computable and answers must be determined via Monte-Carlo methods.

As for 'indepdendence,' his terminology gets a little confused here. At first I thought he was talking about the 'bag-of-words' assumption that most large-scale language models have. These effectively ignore grammar (other than stemming) in order to efficiently determine the 'gist' of a document without its intricacies. However, his videos imply he is talking about word-sense disambiguation[4], which is certainly known about and was the crux of LSA in the first place. If he is talking about lifting the bag-of-words assumption, there has been some interesting work going on, such as [5] (disclaimer: I am a coauthor on that paper).

If you're interested in this stuff, I highly recommend trying out the LSA demo server at [6] (it can get swamped sometimes so don't kill it) and David Blei's LDA implementation at [7]. The LDA-C inputs and parameters are a little obtuse when you first look at it, and I don't have my notes on how to use it at the moment but if you play around with it it should make sense.

This kid is crazy smart, and I hope he gets exposed to a lot of really cool research since he can obviously pull off a lot at a young age. Best of luck to him.

[1] http://en.wikipedia.org/wiki/Latent_semantic_analysis

[2] http://developer.apple.com/library/mac/#samplecode/LSMSmartC...

[3] http://en.wikipedia.org/wiki/Latent_Dirichlet_allocation

[4] http://en.wikipedia.org/wiki/Word-sense_disambiguation

[5] http://aclweb.org/anthology-new/D/D12/D12-1020.pdf

[6] http://lsa.colorado.edu/

[7] http://www.cs.princeton.edu/~blei/lda-c/
If it's confident enough, it does.
As someone who has regularly given tech talks on functional programming to audiences completely foreign with the ideas involved for almost five years I'm completely sick of explaining it. It takes up far too much of my time when I could be teaching other cool stuff.

Calling it Expression Oriented programming is something I've taken to recently and it get people on the right track off the bat. They're focusing on the expressions and not just trying to understand how everything relates to functions.
> This is pretty much all any executive does at any company with any scale.

Totally false. They do allocate budget, but they also recruit, retain, and motivate the best staff members they can find. They proactively keep an eye on potential opportunities, order research when necessary and follow up on it. They keep track of how their business unit is operating (not just "are we working on the right problems?" in terms of allocation; also: are there morale problems? are there critical risks that need to be reduced? how will our market evolve around us as we operate? and more) and care for and feed it.

Don't underestimate how hard it is to keep a heterogeneous group of big egos all moving in the same direction, together. It's not at all just reading proposals in a vacuum and deciding what to fund. A company is a human organization, and the main job of an executive is to align that group of people towards a common goal.
VCs pump $2.1B into early-stage startups, biggest haul in more than a decade
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>“Fez is a console game, not a PC game,” he states, emphatically. “It’s made to be played with a controller, on a couch, on a Saturday morning. To me, that matters; that’s part of the medium.” I get so many comments shouting at me that I’m an idiot for not making a PC version. ‘You’d make so much more money! Can’t you see? Meatboy sold more on Steam!’ Good for them. But this matters more to me than sales or revenue. It’s a console game on a console. End of story.”

From an interview with the developer, Phil Fish: http://www.nowgamer.com/features/950149/fez_interview_polytr...
It probably is partially to do with HN, the kind of place that has a demographic further up the spectrum than a random sample of society, whose ability to reason sometimes suffers from a tendency towards talking and thinking in absolutes.
http://www.thelizlibrary.org/site-index/site-index-frame.htm...

This seems to have a number of references.
If they wanted the traffic, what would it matter if Yahoo was rotten to the core? Just buy it, take the traffic, and dismiss the bad seeds.

I don't think this is a mole planted by Google, there are plenty of other ways to figure out what's going on there besides proactively having one of your best performers leave the company.

I'm speculating, but reasonably certain Mayer went there because she was already thinking of leaving Google, after being shut out of Page's executive inner circle. Reading between the lines (and based on input of two friends who have worked with her), it wouldn't be off base to think she's going to try to outgun Google simply to prove a point -- that they shouldn't have passed her up for promotion.

Should be interesting to watch, because I think she's motivated well beyond financial considerations -- this is about payback.
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I would.

I have a son and there's nothing in the world I wish more than to be a stay at home dad. Unfortunately I can't afford to do that.

Missing the childhood of your baby is one of the greatest mistakes you can do in life. And I'm not advocating here for staying at home btw. But working more than 40 hours per week when you have a child waiting for you at home and with enough money in the bank to be worry-free for life - is simply unacceptable, regardless of gender.
Move to Europe. Most countries guarantee at least 25–30 days (the UK is actually one of the lowest.) In Finland you get 40.
Great point, totally didn't see it from that lens at all.

I thin you're more likely right than me.
This is true, but in reality the vast majority of employers do not count public holidays as part of the statutory minimum.
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The End of Free Conference Calls
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It is both a joke, and very much not a joke.
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Firstly, I'll say that I've met and worked with several people from Microsoft and there's no doubt in my mind that they're putting 120% into their QA mission. I don't think any company in the world invests more into and does more heavy-duty patch release testing than Microsoft.

That said, the general question "where's the value in hurting conversions and pissing of a lot of folks, just for a chance to get a $40K fee?" does have an answer.

Consider a company where departments are fighting for budgets and managers are looking after their own neck far more than the common good of the organization (believe it or not, this happens sometimes). Organizations can easily devolve into a state of loving those business units that are perceived as "revenue centers" and hating those perceived as "cost centers". Microsoft used to be famous for derisively referring to teams (and even individuals) as "overhead".

Obviously it's stupid and short-signted, but sometimes things like QA on patch releases for 3rd-party distributed software end up being several degrees removed from the revenue inflows, at least to the bean counters. In these situations, managers may be pressured into downsizing their quality efforts or trying to raise as much raw revenue as possible even if it really represents negative value on the whole.

When the pressure comes down, the perverse incentives pop up. This "stack ranking" scheme sounds like a brilliant example.

My guess is this policy comes from one or two^Hthree motivations:

* Users don't like patching.

* A desire to raise the cost of patching to hopefully encourage higher quality in the 1.0 releases. True or not, the perception among many in the industry is that Apple's app store requirements to jump through hoops to release versions has raised quality among those apps.

* But the simplest explanation goes like this: "Why did you have to hire these extra staff at 40K each?" "Well, because we had more patch releases than last year." "Hmm...."
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Internet Explorer isn't a search engine and to debase your statement a little, a lot of people still use Internet Explorer. Chrome is the most popular browser at the moment and to be honest I'd be shocked if it weren't considering how heavily Google market it (front page of Google, Youtube, etc).

If Google were to advertise a worthy adversary to their search engine on the home page I am willing to almost bet that the competitor would score quite a few new users.
I imagine you don't do business in the enterprise world.
I admit it. I'm a white male. (I do have 4 half-Chinese half-siblings, but they are irrelevant.) However I'm married, and the father of two children.

The first reaction that I had when I saw that she was pregnant was, "She has no idea what she's getting into." I've been there, twice, and seen first hand what pregnancy and hormones take out of a woman who has a baby. I've experienced what it is like to go through the first few months. Sure, she has help. But I know how strong the desire is to connect. And as soon as she does, I know what amount of energy is required. And if she fails to devote enough energy, I know what the pain of being rejected by your own child is like.

This applies to some extent to both parents. I personally took much more than her planned 2 weeks for each birth, and am aware that my performance at work was directly affected for months. (My ability to work hard has been impacted for years but that is a more complicated story.)

However all of this applies to women more than men for the solid biological reason that women are the ones actually get pregnant, go through child birth, have associated hormone shifts, and produce milk. (Yes, you can give the baby formula, but if you've read the research there is a significant chance that feeding your baby formula will reduce IQ. Do you want to risk that for your child?? However breast feeding is a significant time commitment, and opens you up for even more hormones.) And this is if everything goes well. It often doesn't. For instance about 10% of women suffer through postpartum depression, and being a high-flying exec has no correlation with the biology behind that. Or you can wind up on bed rest if the pregnancy is difficult - and the odds of a difficult pregnancy go up rapidly when the mother has external stresses.

Yes, it is PC to claim some sort of absolute equivalence between men and women. But this is very clearly false when it comes to child birth.

When I saw her saying that she'd only take 2 weeks of maternity leave, the first thing that I said was, "She has absolutely no clue what she's in for." When I told my wife the story and my opinion, her only question was, "First time mother?" I said, "Yes," then my wife laughed in agreement.

Now please disclose your experience. How old are you? How many children do you have? Have you considered the possibility that parenting might just be harder than you think, and people who have been down that path might just know something that you don't know?
LSA patent has expired? Thanks for info, I didn't know that.
"Shotgun" angels take a different strategy..

Edit: also, if you think about the YC acceptance rate vs the VC acceptance rate in terms of attempts to money, then it is interesting that VCs consider YC a filter. IIRC, YC has a higher acceptance rate than most top-tier VCs. Note that i probably don't remember correctly ;)
Google has "verbatum" search. It is a little hidden under the "more search tools" link in the sidebar, but it does provide a non-fuzzy search.
A lot of the blogs on svbtle aren't very good.

That is not to disparage the platform itself -- I like the style and the emphasis it places on content -- nor Dustin, who I find pretty fascinating, but the blogs just aren't good. I don't mean 'not good' in the sense of 'oh, this is poor writing', but in the sense of 'the consumption of this content was not worth my time.'

A few examples:
- Dave McClure, who I admire and respect, writing a ridiculous blog post about 'hoping to be a late bloomer.' Dude, you have a Wikipedia article about yourself.

- Dalton Caldwell, who's proved himself time and time again to be prescient (his 2010 YC speech is wonderful in its truths), has been blogging about the importance of app.net. If I'm a developer, a tweeter, and a general tech enthusiast who, after three pretty lengthy blog posts, still doesn't understand what a "decentralized real-time feed" is -- let alone why its important -- then something is wrong.

- Dozens of fluff pieces which serve as little more than porn for the SV crowd.

I want Svbtle to succeed, and honestly think it will. I don't think that success is going to come when its definition of 'curation' involves what it currently does.
Ask HN: For how long will I be green?
For how long will I be green?
I'm used to it, Linux was also a minority for many years.
Can you please expand on that statement?
I believe there are a certain percentage of women who either don't willingly breast-feed or are incapable. How does it affect their babies? Are their studies?

The babies have a statistically significant, but small, drop in IQ. See http://www.scientificamerican.com/article.cfm?id=surety-bond... for verification and a theory about why.
>The fact is, many parents of either gender just aren't that interested in being heavily involved with child rearing. There's nothing wrong with that.

There is something incredibly wrong with that. Gender doesn't matter; if you decide you really aren't terribly interested in raising a child, you shouldn't have one.
VCs make more money because they have more money under management, but angel investments are so much cheaper because of lower due diligence...

VCs may also be making angel investments not so much for the equity but in order to have a shoe in the door in order to have a "right of first refusal" (implied/socially) in later financing rounds.

Unfortunately (as some are learning) this can also mean you make some less-desirable angel investments that would create a portfolio conflict with a desire to do a later round with a competitor in the space... this is why some VCs might have an "angel arm" or similar "separate" structure so they get the best of both worlds...
What's your evidence for that? And what do you mean by management? Groups of apes form themselves into hierarchies, and if you read Down and Out in Paris and London by George Orwell, you'll find that his romantic notions of a life of poverty free of hierarchy was disabused pretty rapidly.
Why I am not sure to Support App.net @ 50 a month
@DanielRibeiro has pitched to support paid/advert free social media. I was thinking of it and I would like to ask @DanielRibeiro what is wrong with Face book and Google advertisement. Advertisement in social media is beneficial to the user and business.

@Google and @facebook are really helping small and medium ( even large MNCs) helping them to market their business. How?
1.At dead cheap rates when compared with traditional media like news paper and TV. This is a great adavantage for SMEs as they have developed a system where you directly target(pixel specific) your audience
2.The advertisement in social media is necessary. What is the best place to advertise and where do we get sucg big user base, if we dont such medium.
3.The advertisement in social media is not obstructing its parallel as opposite to commercial after commercial and commercial in TVs, its user will whether to click or not to click
4. Huge user base and great targeting
5. If you want to develop another app, you can but why I need when the available apps already providing me what I want. Improvements are definitely welcome
4. Cheaper marketing costs definitely help reduce the costs and may help better products, R&D and environment

There are many more! some of you who support me can explain. So why we need to be opposing Social media advertising!
Are you sure about that? I've worked a lot of shitty jobs in my time, and every single job I've ever worked at has had the 28 days as the minimum.
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Yes but that's a different message ("Showing results for..."), and there's a link to force a search for the original term. For me it's right at least 50% of the time that it does this (probably much more, but I can confidently say >50%), so it's a net win for me personally.
Your concerns are constructive and well-placed. It happens that they are all either done or actively being improved, but that's not obvious unless you follow very closely, so keep 'em coming.

"a scalable replication model that allows tiered replication"

They do in 9.2 (currently beta), it's called cascading replication.

The other replication features you mention are under active development by a team of reputed hackers.

"That, and the ability to reliably upgrade your binary without performing a massively time-consuming dump and reloading."

pg_upgrade has been available and you can upgrade from 8.3 to the latest without the dump/reload cycle. It has been a little rocky (by postgres standards) and some people have been hesitant, but it gets the job done and it's been improving a lot. A talk at a recent conference spoke quite highly of pg_upgrade despite running into some challenges (like a library versioning issue related to some perl functions they had and some multibyte characters I think). Not for the faint of heart, but if you really need this and don't mind reading a little (or hiring a consultant), you can make it work.

Every issue or every missing feature seems like a showstopper if you don't step back for a minute. No DBMS is perfect. Everyone has their list of "postgres is missing X,Y, and Z". The funny thing to me is that X, Y, and Z change with each release because the previous X and Y were added (often with greater flexibility than originally imagined), and there's a new alternative to Z.

Postgresql puts out a very high quality release every year with major features. Usually, it's a good balance of features requested by (potential?) users like you and new innovative features that move the database world ahead.
You are right, I remembered wrong for that one. It usually does "Showing results for ... UIView click here to see results for ... NSView". Sometimes I encounter something that gets changed without the option to search for what I typed and I have to quote it.
Cuil maybe have been an initial failure but I seem to recall numerous tweaks being made to the results a few months after launch that fixed most of those issues and made it a decent search engine. They had the index, the algorithm and priority of results just needed to be tweaked a bit.

If you want a better example of a good search engine with decent results that has failed to compete with Google it would be Bing. If you use this blind search tool: http://blindsearch.fejus.com/ that returns results from both Google and Bing. Bing is winning in terms of most relevant results and yet has failed to really steal away any of Google's user base in the long run is this not more than enough proof that people don't care if another search engine returns better results? I think it does.

There are people out there who think Google is the Internet, hows that for brand recognition? People who don't even own computers or don't have the Internet have most likely heard of Google at some stage in their lives.
"will cost at most 5 clock cycles in a single-thread pipeline"

Being a little pedantic here: you can't safely say this part without knowing which kind of branch predictions the processor uses; and, more importantly, how deep the branch prediction can go. There are some processors that will branch predict once ... and then again, and again and again. The first one they get wrong, they have to roll back to that first one. But then, you're right. The more times that single method is called, depending on the implementation of branch prediction, the more often it's going to be right, and so as long as those values aren't changing often (I don't see why they would in the case we're trying to suggest), it may eventually fade into nothing.

Needs moar testing!
Ah, classic, another liberal arts degree bash!

Making your point without denigrating an entire educational system is usually feasible.
Is IRR really the thing VCs are trying to optimize? Since they're once and done with the money, and have limited bandwidth (board seat capacity), I think total returns are their goal -- they'd rather have their $500mm fund make $2b investing 100% vs. have their $500mm fund invest only $250mm total in its lifetime and make $1.5b.
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Wow, I'm impressed she invited anybody to stop by her office anytime to meet her and share ideas. Pretty cool.
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This is what we have to understand. Microsoft stores this digital information on servers that THEY OWN. That means that if any child pornography or defaming naked picture is found on their property, THEY are liable.
I think you're wrong to suggest that having developers and users as paying customers qualitatively changes the conflicts between platform users and platform owners.

Even with paying customers you still face conflicts like:

- conflicts between serving different groups of customers (e.g. IIRC, contractors often complain about Github's pricing because it is more adapted to enterprises)

- conflicts over whether or not specific features are part of the core platform (Microsoft and Apple routinely run into this - and virtually all of their users and developers are also paying customers)

- conflicts over priorities/roadmap and so on

At best, having developers and users as paying customers is an additional weight on the same underlying scales.
I wish this was true, but sadly the games developer community is all about protecting IP and using proprietary tools as much as possible.

Big studios only care about platforms and their support, not if they are open.
I would really appreciate it folks can try out my free and open source GUI client for postgres: http://pgXplorer.com. It is available for Mac, Ubuntu (64) and Windows (64).
If it's really about competition or payback then this will be amazing to watch! Valleywag probably just opened a few reqs.