skysight-inc/HackerNews huggingface dataset:
That is 20% drop in injuries.

EDIT: it's actually a 25% increase as ebrenes correctly pointed out. Server me right for trying to do math early in the morning...
This is a good question and one I don't have a good answer to. I don't actually know the optimal points for most of these values and I'm generally content to let the market decide.

This is why I think eliminating the subpenny rule is a good policy change - it eliminates a market distortion while not requiring you to perfectly tune a parameter (e.g., the size of a transaction tax or a minimal trade latency). All it does is allows price competition.

Of course as a real policy proposal it's dead in the water, since it doesn't provide much opportunity for moralizing or posturing.
ASK HN: How much can I exit this business for?
I've been working on a startup for 4 years. Like most of the recent posts, I'm getting burned out and considering exiting the business. I've never had an exit before and have no idea what I should expect.

Some information:

- I work full time on this and am on $100k salary.

- I have 9 full time staff (devs, support & sales).

- Revenues are growing 60%-80% per year.

- $160-$180k per month in revenue

- Revenue will be $200k+ in the next 6 months.

- Gross profit of $120k per month. Nett profit of about $30k per month.

- Business is still growing

- Sales are made by our sales people, via partners or directly via the website

- CRM business for hospitality (hotels, resturants, bars etc...)

- Have clients in most countries (predominantly English speaking)

- Revenue is 60% monthly fees + additional 40% via transactions (think purchasing additional credits).

- Average user pays about $260 p/month

- Average CAC is about $530.

- Average Lifetime Value of User is about $15k

This is a graph of our revenue since launch (i've removed some identifying data): http://imgur.com/cvFlUNb
Seconding the suggestion to read through chapter 9.
Philip Wood, IBM Engineer on Flight MH370, Posts Photo From Prison?
Did she realize that this was a file already uploaded to Dropbox? That's a very important distinction in my mind. Dropbox has already calculated hashes and fed the data to the servers at that point. They don't don't do any 'looking' beyond the data-shoveling process.

It's the DMCA sharing check that avoids 'looking' even in the most pedantic sense, not the overall use of Dropbox.
As in all hack attempts, while the security may be rock solid, it is still susceptible to the "guy gets locked in a room with Bubba who loves breaking kneecaps with his bat"
I was slightly disappointed that this wasn't about Tarzan switching from ape-man to British aristocrat.
Don't Fake it So that you Make it?
The Power of Framework Thinking
In a batch auction like that you still have a latency game. There is no reason to submit your order until the last possible moment since you will want to incorporate as much information from other markets and news sources as possible. You would just end up with a crush of orders in the last 100 uS of the batch interval.
The example in "Ambiguous Code" is ridiculous - if you write CoffeeScript like that then you have much bigger problems. Also, the part in "Classes Are an Illusion" totally fails to mention the fat arrow `=>`, which solves the main issue the author raises.

However, this part I completely agree with:

> Realistically, the issues I have raised with CoffeeScript don’t come up every day. Ultimately though, they are enough to say we need something better. I hope to share some thoughts soon on what such a solution might look like.

CoffeeScript isn't perfect and we should always be looking for better solutions. So I'm glad that the author wants to add to the discussion. While CoffeeScript isn't the answer, it's probably the best answer we have so far,
This was the case I was thinking of when I wrote that: http://en.wikipedia.org/wiki/Jacobson_v._United_States
The story states that IEX runs HFT trades through an additional 60km of cable. Does anyone know or have a source for how this specific number was chosen? Who decides whose orders have to go through those extra 60km and whose don't?
Should I switch to Google Drive?
How I think what will work? 3D video chat? You need a diagram for two cameras, a 3D monitor, and ordinary 3D glasses?

Or did you mean something else? Perhaps something you've been assuming I'm talking about because your response to abstract notions is hostility and arrogance, rather than a search for common ground and understanding? Perhaps you've assumed all this time that I've been saying a specific product, the Rift, could be used for face-to-face interaction, because you didn't ask, but instead called me a six-year-old idiot?
Malaysia says there's sealed evidence on MH370
Locating Pictures – The Hacker Factor Blog
It occurs moderately frequently in libraries where a user should be able to define domain specific types along with how the library should treat those types. A classic example would be a raytracer where the user might be adding new kinds of scene elements. It probably shouldn't occur in application code.

For what it's worth, I do think people underestimate the applicability of closed sum types.
Nissan has built far more battery producing capabilities.
Creative mom fantasizes her baby’s dream
Nobody knows what babies dream. But the one that can get the closest is nobody but their mother. Sioin Queenie Liao, a freelance artist from California, USA takes creative pictures of her baby boy while he sleeps. The mother of three boys, always enjoys artwork that focuses on her children.
I haven't read the paper, but I would guess that the one-second-worth of orders in each batch are secret until the batch executes
I think this site is really related to this topic, even if it doesn't involve term 'big data'.
http://www.statisticsdonewrong.com/
I've been in the same boat also. After my first start-up tanked, I was kind of lost and didn't know what to do. I ended up working for a consulting firm doing software. Unexpectedly, I picked up a lot of soft skill sets in selling and communication along the way. I eventually quit that consulting firm where now I am doing my second start-up which is doing much better than the first.

I think when a start-up fails, there is the pressure to immediately continue and try to force a situation for something to work. But what I'd suggest is to go with the flow, and perhaps first restore your capital cushions with a full time job.

Try to pick a full time job that can hone your software skill sets, but also allow you to learn some soft skills. As you get back into the groove of not worrying so much, that start-up itch will come back. But at that time you will be in a much better place hopefully~
Delegation should be instant and dynamic. If I trust
somebody to make a decision on my behalf, I should be
able to delegate to them instantly. And if they lose
my trust, I should be able to take it away with the
same speed.

It sounds nice until one considers certain conditions where emotion takes dangerous bias in collective decision making. Think: after a tragedy or during a war.

"Delegating" is the the lazy form of democracy. At least on the ethical and moral responsibility level. Discussion and action are the least lazy. I agree with the OP that other discussion platforms show how that can be done better. Influence of such platforms may come naturally as the zombie generation (read: TV) dies off and the participatory generation (read: Internet) becomes more commonplace. But they should definitely be encouraged.

To me the keyword comes from opinion modelling rather that direct decision and low-latency delegation. As we gauge and model opinion better this will increase citizen influence. ... I'm still not sure however if this is a good thing. In any case the OP's project looks to be an interesting project to build a system to foster such communication of opinion:

https://www.loomio.org/
The world needs a better way to make decisions together.
Then you've done nothing controversial on the Internet.

Death threats are simply background noise. As a hosting provider I don't think a day goes by we don't get one about something or other from some crazy. Most of these people send these off with about as much care as folks post on 4chan, and really don't put much weight behind the words they are typing.

Used to bother me, but you get over it pretty quick. Cost of business of doing anything that gets even a remotely large following on the Internet, bonus points if you get some controversy.
Actually, Android is not entirely open source. Some key components are closed source, that's why project like cyanogenmod exist.
Not sure how it relates to bitcoin, but Visa and Master Card will pull a merchants account if they give cash discounts. They do this, ofcourse, to make cash and cards equal in the eyes of the consumer even though the merchant takes a pretty sizeable hit.
Statistics Done Wrong, The woefully complete guide
Of course, not all Haskell functions are total...
Then use a debit card?
Doesn't matter. There is still the incentive for low latency.
You mean you don't 'consciously' think about work... your brain is actually still joining dots in the background 24/7... unless you stop it by using drugs!
Another Apple-Samsung Skirmish Heads to Court
What the hell is a computer platform market share?

Should Android and Windows be in the same category? Should Windows and Blackberry be in the same category? Is an Android device going to be loaded with thousands of dollars of software and hardware and used for CAD?
Why I’m going supermarket free this April
I don't know what you consider reasonable, but you can express this in Haskell with type classes and existential types:

data P = forall a . Parent a => P a
type PList = [P]

where Parent is a type class.

You have to be a bit more explicit when using a Child in the position of a Parent when adding to the list and you have to use (fully polymorphic!) pattern matches to extract elements from the list, but personally I consider this a good thing as it's more explicit.

Aside: Existential types is what OOP interfaces are -- and interfaces are often encoded as such in language semantics; see e.g. Types and Programming Languages (Pierce).

EDIT: Typos in code -- unfortunately my Haskell is a little rusty :(.
latency arb is still important to keep venues in sync.
Darth Vader runs for Ukraine president (for real)
My impression is that HN's quality declines during the application window. I suspect that this is because people more closely coupled to YC are more likely to be busy and that these people overlap the set of people who influence HN's quality to some degree. In the past demo day has also been noticeable to me.

I'd never really considered that applicants fishing for karma might also have an effect. But my gut would suggest that people under stress and trying to impress might not improve quality either.
I am curious exactly where the sentiment that passion for an idea, and the success thereafter, has to come from the sacrifice of everything else in your life. Is this simply propagated through the romantic biographies of the few people who managed to turn these unfortunate circumstances into success?
All modelling is based on past experience. The usefulness of a model is the degree to which you can abstract it from that experience.

In the case of the pot of water, you can observe the energy input into the system and combine that with some very generic, simple, and reliable physical models to determine when it will boil.

I'm not claiming that climate science is that simple, of course. My point is that some systems are more easily predicted at a larger scale than a smaller one.
> let's say that i purchase a bitcoin for $150. this is my cost basis. the next day, the bitcoin appreciates in value to $200. i use this single bitcoin to purchase a $200 camera. in this transaction, i have spent $200, but i only paid $150 for it. this means that i have essentially received $50 for free. the IRS wants to tax this "free" income. under IRS guidance, this additional $50 that you got "for free" is taxed at a capital gains rate (which is up to 20%).

There's one huge problem with your example: you have a short-term capital gain, not a long-term capital gain. Short-term capital gains are taxed at the same rate as your ordinary income.
https://defuse.ca/audits/encfs.htm
https://defuse.ca/audits/ecryptfs.htm

Probably better to use ecryptfs or dm-crypt.
curious if Meta (https://www.spaceglasses.com/) is going to fill this niche.
Few cars cross borders relative to those that are driven exclusively or almost exclusively relative to those that always drive in country. That being the case, so long as I can use an adapter when I take my car into another country with a different standard, I would be mostly fine.
NSA Spying on German Chancellor Angela Merkel since 2002
I apologize, that was a reading comprehension fail and I read pre-profit.
This is pretty cool. You'd think one would exist in the Tokyo area first though.
Connecting the World from the Sky[pdf]
Exactly. Many people have never had to fill out a Schedule D before and have no idea what long-term vs. short-term gains are, how to compute capital loss carryovers, etc. So their taxes would suddenly become more complicated just because they had a few dollars worth of capital gains/losses from Bitcoin.
A much smaller and less exploitable incentive. A few milliseconds of info from other news sources is not abusive as far as I know. Unlike the ability to react to pending trades before they happen.
Actually there is already one in Tokyo (HN Tokyo) and they started doing their events before us in Kansai.
That's the whole point...Michael Lewis said he can't believe it hasn't been made illegal....5 years ago, during the financial crisis there was a good story on it in the New York Time and one of the Senators said they were outraged and he was going to change it, etc, and of course nothing ever happened.
What about randomizing the auction time?
You'll may have seen this, since this is a bit old now. But, the quality, lucidity, and accessibility of this piece makes it worth another read.

Aswath Damodaran, NYU Stern Professor of Finance has a great piece here on Whatsapp pricing - http://aswathdamodaran.blogspot.in/2014/02/facebook-buys-wha...
These arguments are so poorly constructed, I hope this was just meant to be link bait. Otherwise, the writer is quite ignorant of both the current state of VR and overall history (in my humble opinion).
Indian debit cards are not accepted in Google play store.
I disagree with many of the arguments in the article. I think VR — especially on consoles — has a real chance of making it into gaming.

But I agree that it's not going to go mainstream, not in the way that smartphones have. VR is probably going to get popular with console and PC gamers, but I think many others simply will not care about presence. I say this as someone who has played with the Dev kits. They are fun, and magical experiences the first few times. But ultimately they get put away for more convenient entertainment that is just as engaging.

Edit: which is why the Facebook thing is so weird. I don't think anyone actually wants a metaverse. I think people want fun and interesting unique-to-VR game and simulation experiences.
Fourteen years in IT, ten of them in BI... My definition is as follows: data pertaining to and generated by the source systems that govern various business processes are 'data' data (internal data owned by the business.)

Data pertaining (in whatever abstract sense) to the business, generated by systems outside of the business are 'big'(external data.)

Nothing to do with rowcounts directly IMHO.
The Netflix challenge forums are a treasure trove when it comes to this particular ML problem.
In the end the algorithms grew into huge monsters blending results from tens of algorithms, but the most interesting discoveries were made in the first year IMO.

http://www.netflixprize.com/community/
Can you point me to the order type or flag that allows me to jump? How can they front run? Do you even know what front running is?
> You see 0 value to the latency arms race, and I think you are probably right.

How do you draw the line between investments in reduced latency which are socially beneficial, and those which aren't? It's not like these are cheap investments that HFT firms are making. If they're truly pointless, we should expect them to lead to overcapacity and ultimately the exit of some players (unless, of course, the arms race is being unnaturally subsidized in some way, e.g. by the lack of a sub-penny rule).

When Paul Reuter was using carrier pigeons and telegraphs to move tradeable information between stock exchanges ahead of his competitors, I wonder if people considered this an arms race of negligible social value. After all, the world had gotten by just fine without telegraphs up until then.
"P.S. Bluray cannot be considered dead until a viable alternative arises that addresses its market: Audio/Video-philes. This is a niche market, but a stable one."

I don't think Bluray was developed for this market. It was developed to conquer the DVD, but now this niche market is all it has left.
I've been thinking about something like this for a while. My idea was to use data from IMDB to create a graph where the distance between movies is some ranking of similarity based on the people involved in the movie, the genre, the setting and any other information you could get from the data set.

You could say, "I want to watch a movie like The Wolf of Wall Street" and it would find the closest 10 movies in the graph.

It's still something I'd like to play with if I find the time.
My gaming days are mostly over, but all of the shooter days paled in comparison to playing flight sims (Falcon 4) with a head-tracking mechanism. Unfortunately the simulation crowd isn't exactly like the gaming crowd.
I was drawing a real life comparison to how HFT works...it gives the big banks order information before it is executed.

As for actual commands, sorry I am not a programmer, just a former trader.
And NetApp's Data ONTAP...
I believe all religions are scams.

That doesn't make them wrong, but they aren't worth believing.
This is just a problem with my broker lacking the technical sophistication to synchronize the transmission of my orders in such a way as to ensure the best execution. Whether it's worth it for me to switch to a broker with that capability probably depends on how much volume I trade.

Either way, this problem can be solved much more simply by the application of some simple order timing algorithms than by regulations attempting, in effect, to repeal the speed of light.
What you want is an equilibrium situation where both are happy.
...a larger advertising company of the most cynical variety.
Please, give your life a higher priority! This means spend time with your girlfriend, with other people and enjoy life in general: outdoor activities, creative activities, entertainment, readings and so on. I think nobody can be successfull in work (9-5 job, startups and other forms of jobs) if he is not happy with his life.

And it seems to me that you are not so satisfied.

So first of all change priority: satisfying life first then business.

Obviously work is an important part of our life because it takes lot of our time and because it is very important in self realization. But it is not the most important part of life so you cannot allow it to overcome everything.

So if you want to balance high motivations job and good revenue, start freelancing (even if you live in a so strange country like italy!): it is not standard 9-5 job (but please don't let it become 7-11 job!) so it is more motivating (at least for me it is because you are always facing new challenges) and it pays good and have your side projects grow in a susteinable way.

I think i know what you are feeling...years ago i felt something similar...it is not easy to accept for people with "fire in the veins", but you must put serenity and order in your life priorities! Enjoy! Then start-it-up!

Wish you best luck!
There are other forums with the rules you propose. Many, including the people who control this site, believe that part of the reason for the quality of HN is that we have these rules. I for one agree, but if I didn't, I'd go find one of the easily available low-moderation or no-moderation sites.
No, only those transactions over $600.

And you don't have to do it at all for payments tendered for merchandise, or almost any payment to corporations.

http://www.irs.gov/instructions/i1099msc/ar02.html
Except this hasn't been true for several years in most states http://usa.visa.com/personal/get-help/checkout-fees.jsp
You are obviously not involved in the trading. A few milliseconds definitely matters. And how would you react to a "pending" trade before it happens?
The job won't necessarily even be boring. It's possible that you'll find a job working with smart people that you can learn useful things from.
This looks good, i will give it a try.Also GraphGists looks good way, quite similar to ipython.
I have one question: Why do i use neo4j when i can do k-NN in python with so many macine learning toolkits available? What benefit do i get when using neo4j for movie recommendation?
Meaningful stuff could happen in the elapsed time, so motivating people to get info there sooner was more valuable. As someone who's working in HFT, I think that the surface defined by a given expenditure in (expenditure on price accuracy)x(expenditure on speed)x(profitability) space, the gradient points too far toward speed on too much of the surface.
Interesting thinking.
I find examples useful but always get bogged down to the mass of details and can't focus on my original problem.
Framework, on the other hand, abstracts away the implementation details, leaving a clear structure that's easy to follow. Transparency is the key.
Sanidad de Italia desafió sobre los riesgos de cáncer de los teléfonos
So you were involved in illegal activity? Maybe you should call the SEC and pickup the whistleblower percentage?
Linux 3.14 out
Are you saying that Goldman Sachs's brokerage division is transmitting information about its customers' orders to the GS prop trading desks before submitting them to the market?
hackdesign.org - Do check it out, if you haven't already. Great lessons from some of the best industry practitioners.
Cars need room, petrol/gas, fees, maintenance, and take up time that prevents us from using the other things were buying and desperate to find more time to use.
Saying something that is such a zero-sum waste is great because as a side effect it brought us the telegraph is like saying government bureaucracy is great because firms have had to develop new technologies that happen to be useful in other domains in order to deal with it.
Since chromium supports it, I often use printfriendly.com for this

http://www.printfriendly.com/print/?source=site&url=http%3A%...

You lose some worthy css (code syntax coloring) but otherwise it's pretty nice. (requires javascript)
I never liked this, because there is a way to tell someone the truth with grace.

The canonical example: "Does this make me look fat?"

The answer is "That cut doesn't flatter you." It's honest, but it isn't harsh.

Further, instead of encouraging vulnerability, it masks vulnerability behind an aggressive facade.

I'd prefer Brene Brown's approach to honesty, myself.
They can front run because they receive all of the order flow decimals of a second before the orders are executed. Let's say for example you saw (or your computer told you) that X market orders for Y shares to buy a stock just entered the market...your program tells you this is a lot of volume for this stock and it should push up the stock. Before any of the orders are executed your algorithm jumps in front and buys the stock and sells it a second later for a nice profit.
This is a very simplistic example.
Or for products which can't take credit cards -- e.g. buying gold coins, high fraud purchases, illegal stuff, etc.