skysight-inc/HackerNews huggingface dataset:
> I understand this is the way it is done, however, it all feels a bit hand wavy and not how my gut tells me to do it.

I know what you mean, I felt the same way when I first learned about training and test sets. However...

> Is there any mathematics on defining what % of the dataset should be training vs. testing or is it left to the analyst (like with confidence intervals (95% hypothesis testing etc.))?

Indeed there is - the proper name for the statistical technique is "cross-validation" and much work has been done on the matter. The most common way to do it is "k-fold cross validation", which, when k=2 simply means to split your data in half randomly and use one for training and one for test - basically what the author did. The generalized k-fold cross-validation means that you slice up your data into k subsets, pick one to use as a test set and use the rest as a training set. Then repeat the process ("folding") k times, picking a different test set every time and averaging the results. This, of course, takes longer, but it has a better gut feel because your algorithm is "learning" from all the data rather than just whatever slice you originally chose as your training set. Wikipedia lists a few more common ways to do it:

http://en.wikipedia.org/wiki/Cross-validation_(statistics)#C...

However, since the author's process involves tuning parameters after testing the algorithm against the test set, I'm not really sure how cross-validation would work... Maybe standard k-fold with three sets instead of two - a training set, an intermediate test set, and a true test set?
Definitely true... I was speaking to the example of spending $50k/yr on mailchimp with 1,000,000 subscribers. If you're only dropping $150, then it's not as big of a deal.
There is a chance that willingness might have something to do with using the software to trade millions of dollars in derivatives instead of using it to email friends and family.
Well, this proves that you can be childish and destructive and still accomplish amazing things, right? So.. er.. yay?

(And yes, Ed Catmull is awesome.)
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Suppose that I have 2 possible models that I might try to build. I can train them both on my data set, but how do I get a sense as to which is better?

When you have the split, you can then tell which idea seems to work better.
Hey guys, our queue is growing pretty long. We are scaling it up, meanwhile you might face delays.
What to do after startup fails? Advice?
To make a long story short, I cofounded a startup soon after I graduated from college last year. The startup is corporate vc funded. (think one of the well known brands like Google, Intel...etc). Unfortunately things haven't turned out the way we hoped and it's possible that by next year the startup might not work out. In the meantime I have to plan for the worst scenario.

What are my options? Graduate School? Go work at another startup? Go to a corporate? If I decide to go back to a corporate position can I still get a decent mid-level position or would I have to start at entry level?

(I would have at least a year of startup experience in a product management role.)
also, scared money loses. if you're cool with blowing out then you're fine. are you going to be fine if your not just losing your money but also blowing through aunt sallies money as well?
FullContact CEO proposes no capital gains tax on angel investments
The issue has been fixed now. Really sorry for this bug though. You could check now and let us know!
> despite the documentation mentioning immutability and proper concatenation method

What-do-you-know, Scala has documentation too[1]! And it mentions that appending to a List is O(n).

[1] http://www.scala-lang.org/api/current/scala/collection/immut...
STRONGLY NSFW; would be nice if someone could edit the headline.
Not to mention this example is in your face. For most attention to detail issues there isn't an obvious red squiggly - instead you actually have to pay attention to detail.
> Are there any benifits of using a lightweight DI Engine over Spring?

Well yeah, several.

You don't have to depend on a huge API (spring-core and everything else needed for spring-di) just to get one piece of functionality.

You can avoid using XML as application logic.

You can avoid singletons-as-default-behavior and mutable beans all over the place.

It will likely be faster.
The first half of the video they talk about the value of tax breaks for small business of which he is not a fan.

It gets real interesting when the reporter asks him what he would do. He says the biggest problem for small business is access to capital. So he proposes that angels investing in enterprises with less than a hundred employees pay no capital gains tax on the investment.

I believe that even in areas like Michigan where there are few angel investors it would make a measurable difference.
Core Data growing pains
I personally think whoever is in the white house will be lobbied and will give in to the agenda of these large studios.

Always nice to see a fight back against Americas world policing policy however!
Good bosses carry you long way forward. And this is not an understatement. Just look at what happened to the VP's in GE when Jack Welch was the CEO. They all went on to become CEO's of some very big companies.
I am a rockstar and I can do it all myself, but I get bored of it very quickly.
It seems like there's a key point you're missing, which is that there is currently a constant stream of people entering the market to write $2 apps. They write an app, it fails, and they move on, but instead of a situation where the surviving app makers can now raise their prices due to scarcity, instead the people who left are replaced my someone else who tries to do the same thing. The end result is that no one can raise their prices, because the instant they do, some college kid comes along and does the same thing for $1. And of course the acquisitions of instagram and Sparrow make this even worse, because now there are 10 times more college kids thinking they're going to make $1b by making an app and getting acquired.

Of course, the key to being able to charge a premium comes down to marketing, and positioning yourself well in the market, but that's obviously not a fairly difficult thing to do, especially in these competitive markets.
I still wonder why while there's technology so advanced that can see under your clothes, there isn't technology or common sense to figure out that a bottle of water is completely safe ...
well, these guys seem to be casting a pretty wide net for disenfranchised subgroups. Probably not a perfect solution, but...

http://www.npr.org/2012/07/23/156555402/silicon-valley-boot-...
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Its very easy. I would normally say "wow, look there is a tiger". You can say this as loud as possible. btw, if you notice kids they would do the same thing.
I buy a Garmin every few years at Costco, where price ranges from $150 to $350. It comes with a mount etc and I never hide it. I don't think it has much worth to thieves since they are obsolete not too much later. I also don't frequent dodgy areas (to my knowledge). I do use the PIN protection so even if someone stole it the device wouldn't be useful as is, and they wouldn't be able to get my home address out of it.

Every time I ride with someone who has in car GPS they moan about the user interface and often don't use it anyway due to stale map and POI data.
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Yes, I was using oh-my-zsh. I'd like to try it again if it's easy to make it non-slow.
The Kaggle forums can be a good resource, and competing there is a good way to polish your skills.

Also, you might check out Random Forest algorithms--they're high performance but still very beginner friendly, as there aren't many parameters to tune. There's a nice implementation in the excellent scikits-learn python library.
As wmf alludes, you should compare the pricing of vmware and emc for similar products. I haven't been paying attention for a few years, but back in the day emc would charge like a bajillion dollars for features they were putting into vmware esx for free.
since I didn't say anything about anyone's feelings (including jealousy, for credit or otherwise), I suspect you maybe reacting to another post(possibly the OP)?
Some start-ups not in tune on Aus anti-government rhetoric
White label WordPress iOS app now available on Github
How would Objective-C compare?
You're not familiar with the concept of easements, are you? Generally, the first meter or two of your property is designated as an easement, for the purposes of running utility lines, telephone lines, and yes, cable lines. So yes, most people have given others the right to tear up their yard. It's just that the city then re-grants the rights to one or two utilities as opposed to having a genuinely competitive bidding process for the city's cable, telephone, or even electricity business.
Web sockets.

It's not there yet, but when it is just as common to find WebSockets in a javascript engine as it is to find AJAX functionality, and Web socket functionality is available in a larger number of backend platforms.

We will definitely be seeing a lot more real time web apps/web sites and the very nature of that could change the face of the internet quite easily I'd imagine. Heres to wishful thinking!
薬剤師求人愛知口コミランキング
This is more of a philosophical question for Gittip. I'd agree that the option for one-time tips makes sense. Maybe I periodically contribute to someone who periodically updates a personal wiki, or after a new release of a project I care about. I'm not sure why Gittip decided for subscription-only, but I'd agree that one-time tips make sense as well. If I had to choose only one model, I'd opt for one-time tips.

But (crucially) I still think a quarter is way too small a floor. If I don't value the project enough to make a one-time contribution of even $1 (ideally more), wouldn't everyone be better off with me just sending a nice tweet and/or email? The quarter doesn't really help the developer much more than that. If I were mailing a shareware payment in the olden days, a quarter would barely cover postage.
Google IO 2012: Android Developers Live Podcasts on TuneIn
congrats guys, two Q's

have you thought about maybe options to split html into ejs/jade/other templates as well

you could in theory be able to do the reverse (html to image ) as well ?
Not just you. We see that too. Not sure why though!
hey bosky101, That is exactly what we plan to do. This is just the starting point :)
So what does this APM program actually consist of? How are people selected for it? What actually happens in those two years? How do people leave it? How is it different from similair programs at other BigCo s?Would any present/former members of this program like to comment?
Standing up to the stuffed suits at Disney would have been no job for the fainthearted. Jobs may not have done anything at Pixar, but he certainly did a lot for them.
Physical Tchotchkes have done well for 1000s of years. Do you think people will get tired of virtual Tchotchkes and go back to physical?

I know it seems odd that people pay money for essentially tiny bits of entertainment. But the fact is that's what lots of people want. If you want to do something positive try combining the virtual Tchotchkes with something partially educational.
SkyCube: A Web-Funded Satellite Lets You Tweet From Space
IOS Soars Ahead of Android Development
I am no Apple fan, as a matter of fact I don't like the look and feel of their product but I gained a great admiration for Steve Jobs because he seemed like a man in immense suffering.

People tend to forget that the word "passion" itself is rooted in suffering and sacrifice. By (classical) definition you can't be passionate about something unless you sacrifice for it.
Microsoft digs deep into Windows 8's hardware graphics boost.
I agree. Making money through affiliate and lead generation has been around for a long time and seems to transition nicely as the web evolves.

I'm sure there are plenty of apps that do just this and there will likely be more on the way as global mobile adoption numbers increase.
Cyberterrorism now blasting AC/DC to stop Iran
while I dont agree with the stuff Eugen kaspersky says, this is mostly a fear mongering piece.
Well, isn't it true?

Tech means you create value -- you are "your own bitch". And you do it in non-strictly-regulated area. It's not even all tech - telecoms aren't, for example.

What other areas of employment generate jobs like these?
Ask HN: What are your favorite IRC channels other than #startups?
رامز ثعلب الصحراء الحلقه 5 يوتيوب
Queue is back up normal now.

But a few photoshop files failed, since Markupwand isn't yet capable of handling full pages and a few complicated cases.
> 2 extra frameworks (backbone and underscore),

Neither backbone nor underscore are frameworks. First is just some skeleton structure, second is just a lib of useful functions. When writing larger applications you are likely to reinvent both. Badly.

> in addition to still needing jQuery

I swapped jQuery to Zepto in the middle of the development of the project without problems. Sure, they are intended to be compatible, but anyway.

> Backbone is so needlessly open-ended and directionless that a dev who doesn't
> already know how to write good code will just write worse code.

And a developer who does know how to write a good code can use backbone instead of writing they own version.

> The other technique I use for modules to talk to each other is sheerly through event
> signatures. If you have a login module, it can emit events like "loggedin" or
> "loggedout". Any other module can subscribe to those events and do their own thing,
> without interfering with others, etc.
> This pattern works very well and is a hell of a lot more usable than anything I've
> ever been able to do with Backbone.

Funny, but I am doing the second with Backbone. I have Backbone events in views and global events wherever I need them. And I use Backbone.Events for that too.

> Coffeescript is not JavaScript. It's another annoying abstraction.

No, it is another way to write JavaScript. So pleasant that after I wile you sigh when you have to write plain Javascript again.

> Get back to basics, learn how to structure your code,

Good advice.

> and just get some fucking work done.

And Backbone will help with this a lot.
Some people just hate anything popular. Things can be popular for various reasons. Being damn good for the task is one of them.
Sure hope they fix Yahoo Mail. I read my Yahoo inbox through GMail via POP now, which seems silly.
Based on that logic, no good APM would ever leave Google. Somewhat surprisingly (apparently?), some people don't think money is everything and look at other things too.

Here's a pitch for you:

You can stay at Google, be successful and make good money. But here at Yahoo we have this search engine. We want YOU to make it better and more profitable than Google is. Look - we'll pay you plenty of money to come, but I'm sure Google will offer you just as much ore more to stay. But if you succeed in this role - which everyone assumes we won't even attempt - then you will be a legend in Silicon Valley forever.
They even did tried that out, proposing an yearly payment subscription for the push notification, but that was not well received by customers.
http://www.macgasm.net/2012/05/16/ask-and-tell-sparrows-subs...
Another thing this OP leaves out is Sparrow was also probably running advertising, and thus burning more capital, to try to get their app store organic coefficient up. The peaks and valleys in the ranking numbers lead me down that train of thought.
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I agree that Groupon's practices here may be beneath contempt, but noone forced this business owner to sell his products via Groupon. A tiny bit of research on the net will tell you what to expect.

Many business owners view these voucher offers as solely a publicity exercise and fully expect to make a loss, with the hope of gaining new customers in the long term (whether it actually works out like that is debatable).
Deciding How to Grow
Blueprint Healths Latest Class of Startups
Why getting coverage won’t fix your crappy start-up
Can someone explain what problem Ncira solves? I've been to their website, but I really don't understand what they're doing.
Looks like it has "letter-spacing: -1px" applied
There are a lot of lawnmowing and landscaping services out there which save you the time of having to mow.
Rapid Prototyping with JavaScript and NodeJS Training
Thank you so much for writing this. I've always felt like I was missing something with Backbone -- I knew that it was mostly infrastructure and assumptions that helped organize and clean up client-side code, but coming from mostly a backend/rails background, I never quite understood the assumptions that were being made and the "magic" that has happening behind the scenes. This step-by-step process is really helpful.
What I saw from Jobs at Pixar seemed largely counterproductive. Maybe it worked better at Apple?
LOL at that picture :)
That's pretty bogus. Little more than a PR stunt. Honestly, I would have more respect for Amazon if they just didn't have such a program or made it basically secret rather than treating it as a call to action for other corps to "copy."
Update August 14, 2012: Turns out waffles are a Veblen good. Who knew? Also, it turns out that it takes way too long to order a new Ferrari.
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New DVD Releases July 24 2012
Also, with the possible exception of membership-based stores like Costco, the "guards" at the front of American stores like Best Buy don't actually have any authority to prevent you from leaving without checking your stuff. Of course, some of them are not correctly instructed on this fact and will break the law and illegally try to obstruct your exit from the store/parking lot anyway.
[ANN] BubbleWrap 1.1.2 + stepping down
Frankly it's too early too tell if this market has legs. My guess is that it's a lot more limited than most of the current players think but who knows for sure?
And there are already platforms for companies to create programs on their own, like hasoffers.
Nonetheless the point stands - the original barcode can be used to match up against the internal database of average weights.
If you would like to take the same training many American biomedical researchers do, as a minimum requirement, you are welcome to make a login and affiliate yourself with an institution (any institution you could conceivably think you might ever want to do research with is acceptable, they will all want valid, recent completion certificates during your review process)

https://www.citiprogram.org/Default.asp?
My guess is that the red digit encodes the reason for the discount.
Probably because chrome (and/or ff) doesn't handle decimal point sizes well (18px =~ 13.5pt) 13pt works fine though, as does 14pt (after adjusting the word break)
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It's interesting that, after all the productivity gains in the last century, we are still worried about maximizing output, all while putting two adults to work in each household.
Thank you for teaching me a new term! http://en.wikipedia.org/wiki/Veblen_good
Facebook's first investor bets big on Aussie 'corporate refugees'
In my manager past, the times i've asked for crunch mode are few and far in between, and I always put a carrot at the end, depending on the severity of the crunch. Anywhere from a nice lunch at a fancy restaurant, to a few days off. I've even dangled a team building movie matinee. I've never found cash to be a real big motivator.

My 2 simple rules for crunch mode:

1. Manager better be there. Me personally, i would dive in and actually start doing code reviews. But even if I had absolutely nothing to add, I had to be there to show support. Even for window dressing. You call for crunch mode, you better be present. Even if its just to buy lunch or starbucks for the devs.

2. Coding is like breathing. Crunch mode inhale must be followed by re-tooling, decompressing exhale. You can only inhale so much.
Reviewing the FDA report, it appears that the two physicians are guilty of grave misconduct if they knowingly violated the treatment requirements set forth by both the IBA and FDA.

That said, there's nothing a priori wrong with the treatment, had it been approved. Even if the result were the same. Experimental treatments are experimental for a reason. In fact, many of our treatments for cancer, including chemotherapy and radiation, are all poisons designed to kill the cancer before it kills you. Introducing a poison into a patient's body in the hope that, if you survive, you'll stop the cancer's progress is really the rule more than the exception in modern cancer treatment.

We really don't have anything better.
Not necessarily just to get traction for Google+ but I believe that Google is also competing directly with Facebook to control your "Identity on the internet". Once one of these monolithic companies controls your identity they can then directly target you no matter where you are on the internet. It's kind of scary, and I believe that it's a fight that Google is destined to win.
Yes, on the server, where C also lives.
Agreed. You've basically described the concept of the "race to the bottom."
Would it be possible to limit these via an outbound filter? I'm thinking something like a 'do not respond before' header and a web server plugin.

That would be relatively expensive, but if you just do it for login/registration/password resets it might go a fair way towards mitigating those sorts of attacks.
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This has strong whiffs of grudge-grinding and ass-covering.

My take is that the IRB was miffed at the end-run using an ethics committee instead of the IRB. However, this is neither unprecedented nor illegal. Ethics committees are widely used to oversee investigational or quasi-elective procedures (ie "elective" off-label procedures for non-life-threatening but massively debilitating conditions).

It is quite telling that both surgeons still have privileges, and indeed one remains the department chair. The Sac Bee article and the FDA notification letter contain no mention of medical licensure investigations.

There is a massive gray area between clinical judgement and IRB or FDA purview. Drs. can and do use drugs and devices far, far off-label all the time - and there is essentially nothing the FDA can do to the Dr. (however they can come down hard on manufacturers for promoting unapproved uses)

The FDA and IRB do not regulate the practice of medicine and "medical judgement"; those are constrained by medical boards, tort, and in extreme cases prosecution for criminal negligence.

This was research misconduct only to the extent that they made the mistake of involving the IRB in the first place.

background: http://www.ncbi.nlm.nih.gov/pubmed/21552172
study pro: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2039978/
study con: http://www.ncbi.nlm.nih.gov/pubmed/19404146