skysight-inc/HackerNews huggingface dataset:
I don't see calculus as an abstraction of abstractions. The fundamental idea is completely geometric: "break the domain of a problem into a bunch of pieces that can be easily described and related (e.g. by physics) then put the pieces back together." Time is a first-class dimension. Abstractions only enter the picture when you want to separate the problem of picking a mesh from the problem of representing mesh elements.

Differential operators perform the task of "breaking into pieces" in a mesh-invariant way. Differential forms are mesh-invariant pieces. Integration is the mesh-invariant description of putting the pieces back together.

It's convenient that differential forms can be interpreted physically (by normalizing, associating with geometric elements, etc) but I'd hesitate to associate them with any single physical interpretation (e.g. rates of change) because doing so de-emphasizes the generality of the approach; you can have a rate with respect to distance, area, or volume just as easily as a rate with respect to time.

Leibniz notation makes the hop from the geometric approach to the "operator that maps a function to a function" approach seamless, and since the latter description isn't nearly so intuitive, I've always suspected that the geometric approach could profitably be taught first.
Not to diminish your experience, but I read this piece recently from Ken White at Popehat, that sheds a rather different light on it.

His phrasing may not be to everybody's taste, but he does have a decent amount of relevant experience.

Rather than tread over the ground well-described by my colleagues in the criminal defense bar, today I'd like to describe something else for you: what a federal grand jury proceeding looks like. From 1995 through 2000, I presented cases of varying complexity to federal grand juries as a federal prosecutor in Los Angeles. That experience did not inspire confidence in the process. Rather, it taught me that the adage that a grand jury will indict a ham sandwich is an understatement. A better description would be that the prosecution can show a grand jury a shit sandwich and they will indict it as ham without looking up from their newspapers. The notion that the Supreme Court relies upon — that the grand jury has a "historical role of protecting individuals from unjust persecution" — is not a polite fiction. A polite fiction would have some grounding in reality. It's an offensive fiction, an impudent fiction, a fiction that slaps you across the face and calls your mother a dirty bitch.

http://www.popehat.com/2014/02/27/the-kaley-forfeiture-decis...
This is really cool - I wish I'd had this for teaching git a few weeks ago.

FYI - it looks like branch creation is broken. Creating a branch and following with `git commit` gives the error "Not a good idea to make commits while in a detached HEAD state." It's not a detached HEAD, it's a branch.
Here's the story from CBS News if you getting pay-walled at the New York Times article: http://www.cbsnews.com/news/ukraine-crisis-shots-fired-at-uk....
Nice looking site. But sites like this are only continuing to influence the many public health worries that we face today. There is no nutritional information on any of the meals on this site! Just another social site, looking at the wrong aspect of health.
> It is kind of shocking to me that the state isn't liable for defendants' legal fees in the face of an acquittal.

The state is, even if you're found guilty. You just need to be in a position where you couldn't afford an attorney yourself.
I suspect it will only catch on once the big email providers find a way to make it transparent and cost-effective. And we start seeing verification icons in email clients above our messages. That way humans know it matters ;-)
Does this create the potential for essentially becoming perma-banned from commenting once you have a single comment that doesn't make it out of 'pending'? Won't most commenters eventually be unable to comment, or am I missing something?
having a quiet place to retreat to and work does not preclude meeting in noisy bustling coffee shops and bars - simply walk into any coffee shop or bar near Middle Temple and throw a brick. you will hit a lawyer. (please do not actually do this)

No one sane chooses to work exclusively in noisy bustling environment - bar managers go to a quiet room to count the cash and add the wages up. Torturers routinely use loud environments to break a subject.

Quiet controlled calm is good for humans. Bustling and networking is also good for us.
That seems rash. The 'simplest thing' is a first-order approximation of a good thing. It could quash conversations, lock out users for days perhaps. And how can someone even talk about problems, if they're locked out? Catch-22.

At least measure the results, including people who give up and go away. It doesn't take much frustration to discourage even an active user with cogent remarks. I can see the quality taking a dive when regulars are driven away.
Bitcoin is still trying to be a digital analogue to paper cash, so even if the protocol is not broken, the premise is.

Just the fact that it's digital puts Bitcoin into another realm entirely. I can make a bitcoin hoard so secure that only rubber hose interrogation will allow another access to it. It's also true that it would require concerted effort, or that I could do this improperly, or that I may already be subject to surveillance.

It used to be that ordinary people were hopelessly clueless about automobiles, up to the point that people hung bulbs of garlic under the hoods of their Ford Model T's to "fix" them. Now, while not everyone is an expert mechanic, there's all sorts of automotive knowledge floating around the culture.

Unfortunately, the sad truth is that we don't yet have the proper security infrastructure for even very knowledgeable people to be safe without constant, concerted effort. Expecting general security knowledge in today's world is like expecting widespread literacy in the days before the printing press.
Because it is illegal. No need to be a dbag and downvote me because you didnt read my comment properly. Its illegal but not wage fixing and not a cartel.
I love this idea, and welcome any attempts to improve the quality of comments on HN (despite already being one of the more sensible discussion sites).

My problem is with the not being able to post more comments while one is pending. I'm mostly a reader/lurker and only really comment on posts which really get me fired up. Now what happens when I'm taking 30 minutes in the morning to read HN and want to make 2/3 comments on a couple of different posts? Would I now only be able to comment on one and hope the others remained suitably visible for me to find them later? I really think blocking further comments while a user has a pending one is a terrible idea, and will only harm HN in the long run.
And can't you just install an alternative browser? do none exist for the ipad?
My all time favorite post on this topic http://avc.com/2010/08/what-a-ceo-does/
A CEO does only three things.
1) Sets the overall vision and strategy of the company and communicates it to all stakeholders.
2) Recruits, hires, and retains the very best talent for the company.
3) Makes sure there is always enough cash in the bank.

great CEOs can and often will do a lot more than these three things. And that is OK.

But if you cannot do these three things well, you will not be a great CEO.
Experiments in Musical Composition with ALife
In that case is there any benefit in waiting until you have widespread adoption and/or local distribution?

Pricing is always going to be a delicate balance. On the one side you want things to be simple for beginners - and in this regard Arduino is right up there - but on the other hand it needs to be affordable. To be clear, I think this is a great looking product and I'll probably get one.

One of my hangups with the Arduino ecosystem in general is that you can buy the core for $20 or so, but you're stung when you buy any of the shields to go with it. This has kept me to using plain AVRs or 'minimalist' Arduino boards with just the bootloader. It got to the point where I taught myself PCB design because it was cheaper to make my own breakouts and buy the components from Farnell/Digikey.

Does the 32U4 really limit you that much? It comes in a QFN44 which is ridiculously small - I have a Sparkfun Pro Micro which fits into a breadboard with room to spare (and could be shrunk further if you removed the silkscreen labels). USB would possibly add a bit to the length, but it would fill a niche.
I make about half my income from my job, where I get paid relatively little for my skillset but have heavy equity that will vest in a few years, and then I do about 15 hours of work a week as a consultant.

I hire out subcontractors to increase my throughput, and I make the other half of my income from this. In total, I make more dollars from the 10-15 hours a week I spent consulting than from the 40 I spend in my job, but I've done the math and when you include the equity vesting in a few years, in terms of per-hour rates, the full time job and the consulting share nearly identical rates. One just has a longer payment period.

When I started I was afraid to freelance because I didn't feel that safety net of my job beneath me, but I finally got my first job working 300$ for 20 hours of work. It was ridiculously underpaid. But I got my foot in the door and now I make quite a tidy sum from it, while getting a lot of enjoyment and satisfaction in it.

Also, I'd always recommend having a side gig going on because it frees you. I don't need to work full time - I don't use a single dollar from my full time job anymore. It goes straight into savings. That kind of thing can free you, and make you more likely to be eligible for raises at work because they know you're only here because you want to be.
For practice, you can test out your bitcoin option pricing skills in real life at our site, feedback appreciated :) https://www.cointures.com
Para Alcanzar el Exito
Not according to any defn i can see. All defns say a cartel regulates production and output.
Reminds me of the 'one last time' syndrome. My boys would always ask to sled the hill, or ride their bikes around the park 'one last time'. This was when the injuries happened. The urge to make your best effort, when the time has almost run out, often results in disaster.

If you value this community please don't fire this mortar round into the midst of this thriving market of ideas, then ride off into the sunset. It has bad idea written all over it.
The phrase "home location" in the headline feels a touch alarmist. They're revealing your city 68% of time, state 70% of the time, and time zone 80% of the time.

A person might not feel terribly concerned to reveal they live in the greater NYC area, while the location of their home feels more private.
Now how about doing some 'real' research on methods, which would make people stay happy at work.
Dammit! I was 24 hours away from posting my DNSSEC post! You win this time...

For what it's worth, the first KEY/SIG/NXT DNSSEC draft dates back to 1994(!)
This is a very cool concept and I love how it can work together with AirBnB. If there were a similar platform for long-distance travel then I think the sharing economy will help people explore the world in amazing new ways. Not that ride-share and similar services don't exist, but some means to travel international would be amazing. But I can't even imagine the legal problems such a service would face.
> Unfortunately DAs are rather underpaid ...

What's worse, that DAss offices are lacking in resources or that public defenders' offices are lacking in resources?

http://www.nytimes.com/2013/08/24/us/public-defenders-are-ti...

http://www.americanbar.org/news/abanews/aba-news-archives/20...

Then there's all the underfunded PDs' offices for states/counties/cities that just don't have the resources to defend their clients.

Maybe a better system would involve both the prosecuting and defending attorneys be both paid for by the state from a pool of volunteers and both given the same compensation for their time?
Or, HN will tweak and tweak, thrashing and going in circles trying to whack all the moles, while frustrated contributors fall away daily.
Some implementations of 3D secure are better than others. For instance, one of my banks uses a challenge/response system with a separate physical card reader http://farm4.staticflickr.com/3237/2486214902_8feafd8200_b.j...
This is still extremely inferior to modern RDBMSs which usually support row level looking.

I suppose row-level locking is a necessity when you want to be able to scale vertically. By comparison, I understand that MongoDB doesn't even try to support vertical scaling so it makes sense to not bother with complex locking systems.

Personally, I'd prefer to have to option of scaling without being forced to increase the number of moving parts in my single most important system (the database)...but the MongoDB docs make the fair point that there's a ceiling to vertical scaling. It's probably higher than most people think though.

As an aside, I discovered recently that Informix supports byte-level locks for 'smart large objects' (namely CLOBs and BLOBs). Makes me wonder whether field level locking will appear some day.
It's not a non-issue. I've been a victim of identity theft 3 times already.
And they managed it without "early bird" deals which is highly commendable.
Lifeboxes – your life expressed in boxes
How could they not know? While Mr Schmidt was CEO, it was a three way decision makin process as I recall. I'm of the opinion that something this big, with such large long term consequences, would surely have been discussed among equal decision making partners.
Incredible how so many people still kill to work at those companies. Maybe this is a sign that likes of Google on are on decline at least as far as their ability to attract top talent is concerned.
That's shocking.

How long are the DNA samples kept for?

It's a bit scary that "they" seem to want everyone on their DNA databases, rather than realising the database is more effective if they try to only include the criminals.
"I'm currently a student "

"I do work part time as a developer in a start up and can't help feeling i'm building a dream for someone else."

"Not that the experience isn't really good, (It definitely is and I learn more in work than in uni!)"

"Unless i'm missing something important, I am young and naive after all!"

You are. At the risk of the ire of others on HN I have to say that this is a totally millennial attitude of - gasp - entitlement. Tempered by the fact no doubt that you realize "I am young and naive after all!"

I think you have to back away at this "I want it all now" thinking that you have.

You are gaining valuable experience and I'd like to know why you feel that you deserve better than that at this point? To me that's scary. I'm glad you asked the question but want to know why you feel you deserve, at this early stage in your career, to jump to the head of the line.
This post brought 20k+ visitors to our Google Apps training blog
Sounds about right given my experience serving for a few months every Wednesday in Brooklyn, NY. Nearly every case was a drug charge involving someone caught at JFK/LGA, FWIW, too.
most dangerous power of the prosecutor: that he will pick people he thinks he should get, rather than pick cases that need to be prosecuted.” Prosecutors could easily fall prey to the temptation of “picking the man, and then searching the law books...to pin some offense on him.” In short, prosecutors’ discretion to charge—or not to charge—individuals with crimes is a tremendous power, amplified by the large number of laws on the books.

The messy state of US law, with many preposterous and outdated laws on the books, encourages this kind of discretionary enforcement. Even police officers can often "pick the man, then figure out the crime."
The magstripe reader hack lets you copy the data using the magstripe and then replay it at any other mechant.

When you hack a PIN keyboard, all the transactions will still go through the merchant's account, and it's easy to catch the thief.
Genuinely awesome concept. I hope you find a way to make it work within food/zoning regs because I think this is much more positive and communal than many other 'sharing economy' ideas.

It'd be great if you could figure out a way to provide social trust that wasn't through a FB login though.
I always found the idea of YC's 'secrets' funny, because if there's one organization with its central philosophies laid bare for all to see and consider, it's YC.

I wish we had so much detail on the founding principles of other organizations (in thoughtful essay format, say). We'd know a lot more about what makes groups of people succeed and fail in achieving their goals.
Nonsense. Lots of conversations continue with an interested subgroup, especially new or niche topics. Its easily possible no one with 1000 karma will ever visit.

Which means such topics are dead to HN. What remains? Something we can't predict right now, but I suspect it won't be what we want.
... with "assumption" used in its "spherical cow" sense, of course [1][2][3].

[1] http://en.wikipedia.org/wiki/NP-hard
[2] http://en.wikipedia.org/wiki/Local_optimum
[3] Making this point in the service of Internet Clarity. I don't think we disagree (unless I've misread).
sounds like google keep
A new subreddit /r/UntouchablesOfHN?
With that attack, it's super-easy to catch the criminals (both the merchants should know who they hired). With mag-strip hacks, you can anonymously attach a skimmer anywhere that broadcasts the information to wherever you are at a safe distance. Huge difference in security.

edit: for the record, I believe EMV should be upgraded to put a display and PIN pad on the card itself
The location of my home is in public records and also the white pages.

Anybody that wanted to do something bad to me via my address can find out where I live a lot easier than with Twitter. Also, they are only getting the city.
Academic success is based on hard work, intelligence and to know exactly what not to say.
I run my own DNS server. I contacted my registrar to enable DNSSEC for my domain on the domain root server. All they could give was a package where they would take over my domain hosting, that was the only way to get DNSSEC for my domain. Switching registrars next year when my domain expires .. can anyone recommend one that actually supports DNSSEC for .info domains with private key management?
Silicon Valley can’t keep up with Korea’s financial revolution
Ask HN: Best accounting software for UK Startups
Hi there,

I am interested in peoples opinions on the best accounting software for startups in the UK. I have looked at Sage 50, Quickbooks (the safe options) and also like Xero. What has everyones experience been?
Is it recruiting? You cited $10k minimum customer spend.
Ask PG: An essay on how to evaluate startups for prospective employees
I made an Ask HN post here about a year and a half ago titled "How should I evaluate a startup as I job hunt?"

https://news.ycombinator.com/item?id=4340196

PG expressed interest in writing an essay on how potential employees should go about evaluating startups, especially on distinguishing 'true Bill Gateses from mere good talkers'. (If this already exists, I have overlooked it. Please let me know).

I think such an essay would be great to motivate engineers at Big Corps who are considering making the leap into the start up world. I know I could have used something like this myself.

But maybe the range of startups and the breadth of potential employees is too large to be generalized.
> As in, I go to onlinevendor.com and click "pay", it redirects me to my bank, I log in and accept the charge, it directly charges my bank account

This is quite common in Sweden at least. It's called "direct payment" and works with the 3 biggest banks. The rules around disputes and chargebacks are muddier though. Debit/credit cards also have 3DSecure for password authentication.

edit: also, debit cards work 100% for online payment, there's no reason to apply for credit
All great info. Thank you.
>Insert cryptocurrency endorsement here

Not likely to happen soon:

"The system is not sustainable but it may take decades until it collapses. Having multi billion budget credit card companies can shape legislation to stifle innovation that could reduce amount of fraud. Banks have no incentive to fix the system. The more fraud exists, the more obscure and complex services they can offer and the more effectively can justify their existence and demand higher fees."

http://www.securitykiss.com/resources/roboblog/credit_cards/...
I think you're wrong and are just trying up make some claim about Reddit. I don't think it is as simple as "upvoting in agreement is legitimate therefore the converse is true." Down voting as the effect of removing the comment from discussion and is even used to indicate there is something unfair, mean, or what have you. I think what you're talking is more for a site that shows the scores of comments but does not obscure them.
HN title doesn't seem to match the story title.

Also: "At least one person was wounded Saturday at the Belbek base, beaten by Russian special forces, but it was unclear if the man was a soldier or a journalist."
1. The physical product - it is actually a good idea to take a simple piece (you can just take a piece of wood like the inventor of the Palm Pilot did) and do an improvisation theater with it. For this you explain to a user what it does and hand it over to them and ask them to explain to you how they use it.

2. The visual mockup: For me the best results have been to do a simple 3D model and render it with Keyshot - there are rendering alternatives called Bunkshot and some others.
Basically these are 3D Rendering programs that very easily allow you to assign materials to a product and create a high quality render very quickly without having the very complex and advanced knowledge required to do a VRAY render.
Regarding the 3D model itself a good start is Sketchup, formerly owned by Google.
Original author here. Great to see it appear on Hacker News, please feel free to ask questions!
Conan O'Brien: "Bitcoin's COO Explains What Bitcoin Is" [video]
============= GO, SEARCH FOR YOUR ISLAND =============

I know your thoughts very well. I myself have worked for 18 years or so as employee building the dream of someone else -- or better to say: building the wealth of someone else.

I think, a lot is said already, so I want to restrict myself to my personal opinion: If you have this feeling you describe, you should definitively search for your island! And don't give up until you found it.

I am searching now for ten to fifteen years I think and have not found it yet. But I hope, my current project (an online medieval strategy game) will bring me thus far. I dumped until now at least three projects that resulted in a situation that I had to say I can not do it with my resources or in one case the project proved itself to be not profitable. Currently I also dumped my employer to be fully able to find the island I am looking for.

Today, I think, the biggest problem is to find one or more good partners. If you have one, good for you! It makes things easier. But it is so difficult to find one and I have not, since some are just not reliable enough and with others I was not able to find a common target.

The problem is, that if you are in a group you have to give up parts of your own dreaming to find a common dream.
The site seems to be down for me. Can someone describe what's it all about?