skysight-inc/HackerNews huggingface dataset:
I understand the concept of eigenvectors/eigenvalues, and I understand the concept of the covariance matrix, but I'm having a hard time understanding why the eigenvectors of the covariance matrix represent the principal components. Does anyone have a intuitive explanation they would like to share? Maybe I don't understand eigenvectors as well as I thought I did...
Very cool! I wonder if the rise of isometric games have something to do with the pixel down scaling. Isometric games do make use of the 'horizontal pixels'.
While this looks very interesting and I'm sure is great for a lot of people, I think I'll stick to my Apple Extreme base station. It has pretty good software for configuration and provides Time Machine support for my multiple OS X machines in the house.

That said, I think that everyone on HN complaining about privacy and cost and how you can "just install your own firmware" is completely missing the point of the OnHub. Most people have a crappy router running insecure software and does terrible things to the internet and never gets updated. OnHub fixes all that and in a way that my Mom could actually install and use the thing. Almost no other solution (besides maybe the Apple products) would be able to cover all these bases.

So, I'm happy that someone (else) is finally making good hardware with easy to use software. More power to Google and keep the good stuff coming!
Ok, I think people are misunderstanding what I've said. I'm not taking any sides here. What I'm saying is that everyone has their own moral codes which can differ from what's dictated by society (morals aren't the same as ethics). There are going to be people who cheat but that doesn't mean everyone does. Look at laws. People break them. But not everyone.

As for AM as a business, I mentioned that everyone has their own preferences and boundaries. Some people won't create anything involving gambling, adult, etc. but others are okay with it. The same can be said for what the AM founder created. We don't have to like what he's made. We don't have to agree with the business model.
He is black, has super powers even with a single leg. I understand as Jerry Brown was on holiday in Cambodia.
Why. Why oh why didn't he quit? This sounds AWFUL.
For what domain? In games, Lua was always dominant, and in the browser space JavaScript is about as entrenched as it can be...

On the other hand, there are enough applications in enterprise and manufacturing where Tcl/Tk applications run happily along and there's no good reason to replace them. Your nuclear power plant might have a neat little charts GUI done with Tk's canvas and Tcl scripts to tie all kinds of sensors and gauges together. Your automotive supplier might still do CAD/CAM file conversion/distribution/deployment with a Tcl server.

For new applications, it's probably a hard sell these days. Don't get me wrong, I personally think it's a great little system, especially when you're in an 'ivory tower' situation where you control the whole setup and don't need a lot of interop middleware and libraries. It's easy to create simple GUIs for all kinds of tasks and I've rarely seen systems that make it easier to leverage 'non-programmers', i.e. get some user scripting done.

For ugly, dirty hack jobs like web programming, I'd rather go with something more standard or -- if I feel inclined to reinvent the wheel -- with something more powerful and/or rigid (whether that's CL, Haskell or Ada...).

Although weirdly enough, web client programming is certainly something that checks both the 'ivory tower' and 'non-programmer' boxes...
Ashley Madison hack is not only real, it’s worse than we thought
The article make it sound like the incompetence of the Chinese officials is something particularly bad or remarkable.

For my experience those level of incompetence is just what you should expect.

Western world have no idea what China really means...
What if the prosthetic leg had IoT LiPo and SIMD? Freak'n mecha kung fury kicks with TLB page faults!
That being said the problem is less that we are not asking users to provide strong enough passwords. It is that the industry seems to be completely incapable of protecting their users data. This race to the least crackable hashing algorithm is only adding more lipstick on the pig.

Having seen a major leak pretty much every week if not every day the past 3 years, I am now of the opinion that I should provide zero personal information to anyone. Disposable email addresses, fake names and address will now be my norm.
/r/cscareerquestions is good as well. There's a large variety of non-CS tech people there.
Why You Should Care About Microsoft APS and Azure SQL Data Warehouse
Agreed; it would be insane of them not to.
Perhaps this - at last - leads to people only submit personal data to websites who have their data encrypted in their database and a certified to have done that.
I really need to play around with some of the more bizarre graphics hardware systems, as my junior nerd years were more D&D-centered than fiddling around with my C64, and compared to weird 8-bit systems, forcing the VGA card to switch to planar mode seems positively pedestrian...
James Kennedy has this analysis of the explosion [ https://jameskennedymonash.wordpress.com/2015/08/17/the-chem... ], including the possible chemical reactions and the amount of energy released.
CVE-2015-3900 Request hijacking vulnerability in RubyGems 2.4.6 and earlier
It's Google. He and his manager butted heads hard at Google, and he left.
What Is Killing America's Bees and What Does It Mean for Us?
yeah "multi-tenant cloud infra" , is what attracting me too. thanks.
IO visor, advancing Virtualization in Linux
There's so many thing I feel when i read this:
1st: We're all in IT have been on call at some given time , and it sucks , we all know this (since I'm not on my 20s anymore i always ask in job interviews if i have to be on call.)
2nd: Man that sucks ... i don't know how this person has given it more than 6 months of his life , just move on and get a different job if you dislike it.
3rd: Amazon is like any other big company , I've read similar stories about google and MS , i wish the would pipe down and think smartly , proper hand offs to people that are on call etc etc, there's no reason why someone have to be called in the night and unable to take holidays ... come on , nobody is SO important as we want to think.
If you can debug the device remotely, you can debug the device remotely without trusting a third party.

There's absolutely no reason your private home router should be a slave to whatever remote configuration, monitoring, or intercept that some third party may be under legal orders to implement.

IMO these devices are nothing but parasites. On the positive side, Google has no track record with selling this kind of device and hopefully they will fail badly at it.
This "entropy" part is missing - no pictures, no formulae... Delete it or elaborate carefully. (Other parts are great!)
The eigenvectors of any diagonalizable matrix (which any covariance matrix is, see elsewhere on this page for a discussion of why this is the case) form a basis for the space in which the matrix operates. The eigenvectors corresponding to the "largest" eigenvalues are called principal components because they are the directions in which the matrix principally act.

Consider a matrix A which has two eigenvectors u, v with eigenvalues a, b, and a >> b. Then A(u + v) = au + bv. But since a >> b the operator is stretching u moreso than v, and as a result we think of an operator acting 'principally' in direction u rather than v, and hence the eigenvectors are considered the 'principal components'.

I exaggerated the case by letting a >> b, but the same holds true for a similar in magnitude to b, but by considering multiple applications of the matrix you see the same effect: A^n (u + v).

covariance matrices are nothing special in this regard.
My 2 cents:

- The security job is more hardcore. It's a branch of software that you probably will find hard to learn about on your own, with lots of little juicy details. Airline software, I'll bet most devs could figure out how to write if they understood the domain, and there are probably fewer pitfalls. But I'm no expert on either.

- Your subjective experience will depend a lot on the individual people you meet and work with. You don't have much other than gut feeling on that.

- Tech, I wouldn't worry. There's always going to be a whole bunch floating around. Once you get in the zone, you can pick up a new language/framework quite quickly.

- Don't worry too much about your decision. It seems hard to choose, but that probably means the outlook is similar for the two. Otherwise it wouldn't seem hard.
You might find this TED talk enlightening.

How to make hard choices - Ruth Chang
https://youtu.be/8GQZuzIdeQQ

Sorry for the terrible formatting, I'm on mobile (and lazy at this time of the morning.)
Congrats on the 1.0, this is awesome! I love GitUp, and the source code looks clean as well. Some pointers to the good bits:

https://twitter.com/GitUpApp/status/633822376568852481

The downside is that the project is now in "scratch my own itch" mode:

https://twitter.com/GitUpApp/status/633821906387406848

So this is not going to be a commercial Tower.app killer (sadly, they deserve it :P - data corrupting bugs aren't being fixed etc. - but I guess SourceTree being free doesn't help the market.)
> I keep getting downvoted whenever I criticise Ashley Madison on the grounds of morality. Why is this?

Because although most people agree with you, your statements are not considered as interesting. Presumably because they're considered as trivially true. Votes aren't about whether what you wrote is true/false, but whether reading it provides some insights to readers.

If you commented "War in awful!" under a war-related post, you'd be downvoted too, not because people find war awesome, but because reading such a truism give no valuable information to anyone.
I think in order to pass any judgement on the correctness, you'd have to make your remarks more precise.

Are you talking about a random distribution of points on a line / square, or about rolling dice?
State of Ethereum Apps
The elevation of monogamy and closed relationships as the God-given natural status of a couple is the source of too many problems.

Same for not living our own sexuality in the open. By acting like this (that is: like you are supposed to) you are constantly prone to blackmail.

If you happen to have a wife that is entitled in her social-induced belief that even thinking about other women is good ground for the termination of a marriage, then external forces will have a great power over you.

If you live with a person that accepts external affairs, sex with other people and who is ok with your true sexuality (e.g. If you're bisexual or happen to like transgenders) you will always have someone on your side no matter what, and your relationship to that person can't be menaced by any eventual disclosure.

Social stigma might still have a leverage on you, but if you're open with your intimate circle of friends and business acquaintances it would be virtually impossible to use a sex-related scandal against you.

The Ashley Madison leak is interesting because of this, too. It's a breakthrough because it exposes behaviors that society still considers immoral and punishable. People that left behind this archaic way of thinking and built their life together with someone that shares more open sexual values are totally immune to this scandal.

This is certainly something that would have tickled Sir Bertrand Russell's mind.
Indeed, and they seem to make a difference: http://thesweethome.com/reviews/best-microwave/
The other thing that bothered me is that they took an individual who was hard working and loyal and just tossed her. Where is the offering to train her to what their needs have become? It sounded like that she did a great job of getting them where they are now, but yet they seem not to be concerned about that. Where is NetFlix investment towards the individual?

[Granted I realize that NetFlix doesn't exactly standout on that.. its just that they can easily transform a willing individual rather than just decide "nope we'd rather have someone else."]

Why would anyone stay if they knew this happened?
I'm making a general point here. In case of this router, one-time expense is indeed hardly worth mentioning. I just dislike the whole trend.
I was just chatting to someone about this today. I feel like my "honeymoon" period with my new iphone 6 is coming to an end. 6 months in and I'm starting to have to think about when I charge it. Definitely it's not in Apple's interest to solve this particular problem, especially when (I think) they've deliberately made the battery non-replaceable.
People are seldom precise when they talk about randomness.

For example, you could mean: picking tracks with `putting back'. You could shuffle tracks like you shuffle a deck of cards, ie picking without putting back. It's still random, but with a different distribution.

Even picking the first track with 90% probability, and the rest with some other smaller probability is random. It's just not a uniform distribution.
And still, the HN crowd uses Gmail a lot. Here's the most technical crowd on the planet and people are obsessed with Gmail as if it was impossible to get email to work by any other means.

Furthermore, I will never understand why people would use Gmail, if there's IMAP and hundreds of email clients to choose from.

Same is true for Google Reader, that apparently caused a lot of buzz when it went away. Never understood this.

The only Google product I use is Google Maps, and Google Search occasionally. Replaced the latter with DuckDuckGo mostly and works well most of the time.
> this hack victimizes individuals more than the company

Hm; do you really think there's a chance the company will survive this? It seems unlikely.
If Russia wants to tap fibre, anywhere in the world, do we think it's beyond their capabilities? I doubt this capability is even beyond the reach of large corps. Cables have to go underseas (expensive but a known access method) or over land (even easier).

Even if both ends of a link are actively monitoring (can you even tell the distance on a fibre cut?) - an adversary with more than 2 people can just make 3 cuts. It simply doesn't seem practical to think that fibre isn't monitored by any large group that wants to. Seriously, what are we talking about, to run a tap for a year? A million bucks? Probably considerably less.
I love what Netflix are doing right now but I wouldn't ever work there. It sounds like the Hunger Games, with employees desperate to show they're "A" players.

I'd be terrified of having a couple of weeks as a "B+" player and being let go, then having to come up with a creative reason why I spent 4 months at Netflix when I went for my next interview.

The way they dealt with Laura also sounds like they were pretty disloyal to her. They want loyalty from their employees when it comes to "what's best for the company" but seem to give zero in return. How about training Laura up and helping her get her qualifications so she's then able to contribute as you'd like? easier to just show her the door.

This seems to do the rounds every few months as some sort of brag, but I think treating people like this is nothing to be proud about.
Doesn't reporting stats from this leak imply you have the data or access to it? I was under the impression that it was illegal to have this.
10 Best eBooks on Hadoop that you can download for free
The ERLite is a fantastic router. I picked one up with the same worries you seem to have, but there's a decent community around them, and even then you'll likely only need that if you're doing something exotic like failover connections (although even those are now supported through the web UI).

For $99 the only drawback is that it doesn't also do wifi, but given how poorly my previous all in one APs have done that's possibly a feature. Ubiquiti's Unifi APs piss all over older access points I've had, I just wish I'd ponied up for at least one AC standard one instead of cheaping out on the G band ones.
I have to charge my electric car daily. If capacity was slightly increased, it would be biweekly. Do you think they should stop research ?
I've been known to drink Budweiser. Does that mean that I believe that women will suddenly find me sexy and the Swedish bikini team will appear as I pop off the bottlecap to lavish me with scantily-clad attention?

You are conflating the marketing copy of the company with the intentions and motivations of the users. Just because something confirms your most cynical expectations doesn't make it true.

Ashley Madison has absolutely no idea whether any particular user, if they are married, is on there to do anything with their profile other than browse, or whether their spouse knows they are on there, or for that matter if a couple is browsing the site together as part of their joint fantasy life, or if they are in an open relationship, or a number of other scenarios that have no impact on you and really provide no basis for you to cast judgment about their motivations--especially in an absence of evidence.

See again, my cite to David Brin's article on addiction to outrage.
One could always coin a new one or borrow an existing word. I like xenonym, but it's current definitions seem inapropos.

https://en.wikipedia.org/wiki/Xenonym

https://en.wiktionary.org/wiki/xenonym
Furthermore, how will you grow your market while your VC-funded competitors are undercutting you with a VC-subsidized below-cost product?
Awesome country music for logical people illogical people stay away
> One Netflix manager requested a PIP for a quality assurance engineer named Maria, who had been hired to help develop our streaming service. The technology was new, and it was evolving very quickly. Maria’s job was to find bugs. She was fast, intuitive, and hardworking. But in time we figured out how to automate the QA tests. Maria didn’t like automation and wasn’t particularly good at it. Her new boss (brought in to create a world-class automation tools team) told me he wanted to start a PIP with her.

Sounds like there is a problem with the manager. They haven't trained Maria, nor did they motivate her enough to change. Did they even take the time to talk to the individual to sell them on the idea?

The only thing that I'm getting from this article is that only the most visible performing people should be considered to determine the outcome for everyone else. That sounds like they would be letting the bullies run the show.

Another thing to note:

Glassdoor facts:

(Recommend to friend, average rating, ceo approval)

Amazon: 63%, 3.4, 82%

Netflix: 64%, 3.6, 79%
26% of Y Combinator batch is Fintech, 2x other good Fintech vintages
Not surprised to see the overlap between the anti-cop and pro-adultery crowd.
Small team writing unstable software, of course there's going to be a lot of pages.
Imagine being able to use a laptop, or a phone, for days without plugging in.

Can't do it with my laptop but my phone stays on for 1-2 weeks. That's the reason I have a very basic phone, and it does everything I want my phone to do.

I would welcome a smartphone if it could do the same 1-2 weeks between charging. I could easily live with a "dumb phone" mode, that would just basically sleep while keeping 2G on for phonecalls and texts, but with a press of a button it would switch to the big operating system and allow me to check Google Maps or use the browser. Higher current draw using those applications would be justified, but needless activity when left idle isn't.
> This seems to do the rounds every few months as some sort of brag, but I think treating people like this is nothing to be proud about.

What company are we talk about again? Was this the same company were were talking about in the last few days?
I don't know of any other hack that had such an impact in the past.

The US OPM hack is probably of a similar impact due to its larger scale.
I only use Google maps for public transport route planning, otherwise I use openstreetmap. And osmand on Android is freaking awesome.
Verification links gets clicked by mail scanning software (for malware, I suppose) all the time - if the GET isn't followed by a POST - the account is flagged valid.
20 seconds is not particularly impressive..
Nice try by the author to convince people to believe whatever the social media threw at them.
Obvious troll is trolling, I guess.
Eco – a game about long-term thinking and making informed decisions
Very true. But the problem I face is that the so called cool and big impact companies interview based on CS skillset which I do not have. Also I am trying to move into companies where my work can have an impact. These companies either reject applications based on my non-cs background or since CS core is still lacking and am still working on the same.
Why Networking Events Are Hotter Than Your Summer Vacation
I'd go for security, seems more interesting (to me).
Sure it does. Have your venue be a faraday cage so that outside cellular service doesn't work inside. Setup cellular service inside your building, and enter into high cost roaming agreements with the major carriers, at such a rate that the carriers pass it on to customers. Much like cell service on cruise ships.
> The ethical concerns were non-existent, said Anand. “We don’t have any sensory stimuli entering the brain. This brain is not thinking in any way.”

I'm sure this brain isn't conscious, but how do they know that? Is "sensory stimuli" a prerequisite for consciousness? I don't know what it could be thinking about ("hm, the vibe is really ... numb here") but do we know the prerequisites for consciousness?
I bet you don't have children :)
Having children is a binary state. A single contraceptive failure flips that bit and changes everything. On a personal level one failure is a 100% failure.
As another data point, one of my gmail addresses is in the dump (Cf. https://xkcd.com/1279/ ) and listed as verified, despite me never clicking any verification link. Then again, I did contact support asking for them to remove my email address from the account (their response was to ask for money) and perhaps that did something.