skysight-inc/HackerNews huggingface dataset:
Well apart from "there goes October, dang I had real work planned", I am really welcoming this game. I would normally have jumped all over their compiler "tree", but I have been in my first Finance contract this year and I have not yet understood HFT.

Edit: this post got longer than planned - apologies - but this HFT / algo thing has been bugging at me for ages and this seems a likely thread for knowledgeable folks.

The references to Flash Boys worry me slightly - Lewis sold a false scenario there - it's pretty clear that no fool is going to see Bob buying a million Apple shares in London, then zip over their speed of light towers and front run Bob in Frankfurt for another million Apple shares. Who knows if Bob wants a million? Flash boys it seemed relied too much on a protected type of trader (market maker) getting roasted by the emergence of real competition - the "algo" traders.

It seems incontrovertible- equity market spreads have fallen by about 5/6ths in the past decade (no wonder Lewis' hero trader thought someone was stealing from him) but ... How and Why?

what algo traders actually do is a bit of a mystery to me.

The basics I kind of understand :

There are correlations between shares - spot those and you can make money. Let's say oil goes up, car manufacturers will go down by some amount. Short them and make money. The first time people did this they probably thought they had found a money printer. But then someone else starts playing the same algorithm - so you have to get your orders in taste than that guy - pretty soon you are worrying about the speed of light over glass.

But other correlations exist and get spotted and tried out and ... Well it seems a bit of a weak business model to me to live in P of .95.

So the business model of HFT is a bit weird, and the way their actions feed into reduced spread / liquidity is a bit unclear - but anyway, I look forward to totally screwing up my social life in a few weeks.

Anyone who can enlighten me, please shout.
If we are taking the amount of risk I'd like us to be taking, it should be near 0.
And I think he got Wikipedia and Google mixed up :).
Why not to fit your game into single HTML file, without any external dependencies?
I do the same on Google Compute Engine, except without the auto-terminate and scaling :(

However, Google's bdutil has a great set of shell scripts which auto setup the environment; and, with minimal changes you can set up the exact Scala/Spark versions you need.

The fact that I (just one dude) can set up a pipeline and chomp through TBs of data on clusters with TBs of memory over the course of hours still keeps me in awe of the advances of both GCE and AWS.

I'll have to give EMR/AWS a shot!
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I swear to god, and this is terrible, but the Daikatana Effect is one of the reasons we've been so quiet about this.

Since we're going to keep rolling out new level sets continuously, we should probably have been a lot more chatty. But I keep telling Erin and Patrick that I want to control expectations, at least until we know exactly what we're shipping in chapter 1.

Of course, now we know what chapter 1 is, so I've lost my excuses to keep them from writing!

Erin & I have an emulator post ("Everything Thomas Got Wrong About Emulators This Time That He Didn't Get Wrong In Microcorruption") brewing, too.
The customer demo, where either working software or wireframe do design solutions are shown to the customer and team to get feedback, is the single most important aspect of agility. Demo every one to two weeks. Demo to confirm success, uncover issues, and build trust.
Yeah, absolutely it's obvious. These days though it seems they send out "Your experience is exactly what we're looking for........... Come visit our hiring event in <bigass city>". I don't even read them anymore. Just straight to the trash.
> investment/VC pseudo-Ponzi pipeline

ouch. :) And yet what you're saying is true, even for those who are avoiding said pipeline as long as possible! @sama is right... growth and momentum are inextricably linked, and I've found @ userify that days with good numbers (and there are more of those these days!) keep us plugging through the harder days.

With momentum and growth, all things are possible. Without either, nothing is possible, and it messes with your mind. These are the days that you start messing with side projects and taking your eye off the ball.

It's all about building a growth machine on some meaningful axis (users, server, revenue, whatever) and figuring out what makes it grow fastest. Cashflow is derived from that. That's really all it is. Funding, hiring, even the technology itself: all just sideshows. Growth first.

The corollary: build something that helps you track your numbers. My thing literally just emails me a CSV with a new line appended every day. If it ever gets too unwieldy, I'll do something more sophisticated but for now it's a few hundred lines of python that helps me track trends etc in a spreadsheet. (I'd love to see a startup that can do API POST'ed metrics for $10/mo!)

Userify is growing at 50% monthly, but it's still not fast enough. Growth is everything, and the measurement of that growth is critically important. It doesn't need bells and whistles.. just get it done.
Dinosaurs weren't wiped out by an ice age. That ice age you refer to is probably "The ice age" of about 10000 years ago (the one humans think of when we say ice age, because we were there as a species), or maybe one of the other four that have occurred since the end of the dinosaurs, 65 million years ago as a result of a massive meteor impact.
Yes and hindsight is 20-20. They may not know if the pace is sustainable until after the fact.
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Trust me, Patrick agrees with you about Flash Boys. If you haven't yet, read the followup/critique book he cited, even if you haven't read Flash Boys. It's fantastic and chock full of interesting technical details. It's way nerdier than Lewis' book.
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That's the impression I get. It's certainly better than traditional SLA, but still maintains all of SLA's major disadvantages (material/consumable/machine cost, low speed, resin smell/fumes/toxicity, general mess, part decay/degradation over time, limited materials). The tech might take over the SLA space, but I doubt they'll take a significant bite out of other printing processes.
My now somewhat defunt ninjasphere uses it. I've also heard it is popular with openHab or other IoT devices.
> Google's mission is to organize the world's information and make it universally accessible and useful. Its mission is not to funnel traffic to intermediaries

There's a difference between organizing the world's information, and becoming the source of the world's information. Traditionally Google has been a card catalog—you want to find something, they'll tell you where to find it. Now they're trying to become the encyclopedia.

> that's better for everybody, including Wikimedia who don't have to pay to serve the query

If you're a site that makes money via serving webpages, then preventing you from serving those web pages costs money, not saves money.
That's debatable, depending on how you feel about Yet Another Urgent Appeal From Jimmy Wales, or the difference between advertising and NPR pledge drives.
Google and Facebook have more interesting ones.
If I missed the place where these flaws are addressed, I would appreciate your pointing it out.
You might dig this Alex:

https://github.com/cebix/macemu/blob/master/BasiliskII/src/U...
I do not know. I am ignorant of the means in which NASA gathers temperature from the middle of the ocean and presume it is satellite. If that is the case, how was the temperature in the middle of the ocean ascertained in 1880? I would presume they base it on datapoints collected using thermometers by those at sea.
OK, lets break that down more though - Imagine this scenario: You are a founder, you go YC, you grow a bit, but end up with a company that is settling down into a lifestyle company, while it still satisfies you personally. The early investors (YC) push for an exit, but they are a minority of the shareholders. Certainly, you are grateful to them, and have learned much. But at the end of the day, the growth and big exit is a goal of a minority, not you personally.

I understand completely why this is a problem for YC. I just don't see it as being such a problem for the founders.
They are getting less in-demand due to the post crisis glut. I know grads from top schools who still can't find anything other than contract work from time to time.
>To test the accuracy of each search engine, he limited his search query to this year's news articles from The New York Times. He created several fictitious users with different interests and corresponding web histories. Tukrel then fed this information to both Google and his interest-based search engine. Finally, the results from each search engine were compared.

Willing to bet the search phrase did not include "site:newyorktimes.com"
But the headline wouldn't be near as catchy.
Don't you feel the least bit of reservation selling young kids on the idea that they're likely to create a "multi-billion dollar business" by running through a grist-mill of a program that -- by your own admission -- isn't sustainable for most of them?

The vast majority will not achieve that goal (you don't need them to, either -- for sustainability, all you need is a few winners), and in the process, I can't help but feel that they're stunting their career, technical, and personal growth by approaching critical period of their lives with the belief that your economic model of the universe applies equally to them.
As a general rule, college presidents don't get involved in course creation--even at small colleges like Harvey Mudd. In this case it would have been hard for her to have had a part since the course was created before she arrived.
Why would you want the most connected city? Online security is still not a mature field, with many manufacturers completely skirting security requirements. What you are building by going completely online too much too soon is a recipe for disaster.
One of the understated parts of the article was where they compared how the poorly scoring set did on the EXACT SAME QUESTIONS as the previous, better scoring set was. All pretense and human drama aside, that sounds like a pretty reasonable foundation, and it rates against the poorly scoring students.

I don't want to ignore the likely real emotional impact of the technical snafu, but considering the extreme stress the students are already under, I doubt it would explain the degree of difference. Getting actual reliable metrics one way or the other would be difficult, but essential, I think.
If 'startup' is defined by the pace, then you're correct. But do we all have the goal of making a successful startup, or of earning more money from your own idea? If the latter, there's an argument for a business model that allows a more humane pace. It may just not be compatible with many investors' models.
> Asking questions about methods etc. is entirely acceptable.

I am fascinated by the topic of temperature collection methods through the years. Is there an easily digestible source with explanations?
"The Boeing company has been utilizing SLS for flight hardware in regular production since 2002, for both military and commercial programs"

http://www.naefrontiers.org/File.aspx?id=31590
Took 40 seconds for it to load and the navigation to show up. Why is there no helpful message?

The loading bar is really small and doesn't provide enough feedback.
On a tangent but, we have self-driving cars, perhaps we should have lawyer robots as well soon ;-)

Maybe point Watson to all the case history and see what he can do.

It is funny how we read the article yesterday about the "New Aristocrat" class. Maybe automation will replace the Aristocrat class at some point for a change...
The mere existence of some site that serves an answer should not prevent another site from simply giving the answer itself, instead of a referral to the other place.
Maybe 255 characters is too long also. Let's just have a 10 character max:

"Got big" or "Succeeded"

In fact, we could represent it as a bit-field, and then get the story in one byte:

0x01: Made a key product/market connection

0x02: spent on advertising/marketing

0x04: connected to customers by investors

0x08: Fortuitous current event or market shift drove traffic

0x10: big media mention (TV, celebrity endorsement, ...)

0x20: focus on customer support

0x40: Long grind before today's success

0x80: Pivoted one or more times

Then... the story of Zapier: 0x62 :-)
Is there any way for this technology to do multi-material or multi-color prints ? how ?
And don't forget "global warming is inevitable now, so there's nothing we can do".

In my experience a good Fox News segment can use all three of these, at the same time, and switch back and forth among them, with no cognitive dissonance apparent. I don't think any of them are really being phased out, it's just that if any particular one is defeated in conversation, the arguer switches to one of the other arguments.

EDIT: Indeed, there are several HN comments in this thread to that effect.
There is an Australian company making something similar. http://www.gizmo3dprinters.com.au/
They expect to launch their kickstarter project by end of year.
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This would be a stronger article if it looked at the economic impact of 2% of the apartments being AirBnb rentals vs having those 2% be part of the leasing pool. Housing affordability can be addressed by raising wages (something that hasn't happened).
> A tap in an urban building is not inhabited by magical water fairies; that water comes from the same places that traditional farms get theirs.

Well, the same general class of places, maybe not the same place. Which may make the issue worse -- moving farming from existing locations to cities may further concentrate water use in urban areas, leaving them needing to meet the existing urban needs plus food production needs -- which may have a very high cost in terms of new water delivery infrastructure.
Not surprising, given their competitive positioning against Amazon. In other words: was this a technical or business decision?
I projected no attitude in my original comment.
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Slightly off topic but the male/female ratio is very imbalanced in places. Having just moved back to Seattle from Tokyo, this imbalance is very prominent here, which wasn't noticeable in Tokyo. Just yesterday I went to a bar with a colleague. I counted 21 males, 0 females. That type of ratio isn't uncommon here it seems. A friend went to a yoga class with his girlfriend and he said more than half the class was male. They also took salsa lessons together and mentioned that men had to have other men as dance partners since there wasn't enough women to pair up with.
Yes (to be fair, it is getting better as better formulations are developed). Additionally, resin is expensive and the parts degrade and become brittle and fragile over time. Their innovation is very cool, but it won't be displacing FDM any time soon.
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I do wonder about the logic of collecting the email addresses of interested parties, then sending them 2000 and 8000 word (respectively) essays. Do people actually read and value such long emails? Do you not lose a bunch of on-the-fence users each time you send them an email which isn't immediately useful or actionable?

Then again, I know very little about running a startup; patio11 has a track record. Maybe this works as a strategy.
A lawyer can only represent a single entity during any given billable unit. This means the independent lawyer is completely dependent on other individuals for their entire income which must support all of their outlays.

If a lawyer is entitled to the same work schedule (40 hours/week) as everyone else, then those 40 billable hours must be paid enough to support those outlays. That is why legal services are expensive. You are not just paying for a unit of work, but rather, subsidizing a lawyer's entire lifestyle.
Quantitative improvement, not qualitative. They don't need to separate the resin from the base plate after every layer, which means vastly improved speed and precision and much less complexity. It's the difference between a car that can go 5 miles per hour and a car that can go 50 miles per hour - only quantitative improvement, but now you have a reason to use it every day.
No, I don't.

We try to be up front that they have a high chance of failure. But I truly believe that there is nothing better for their career, technical, and personal growth than doing a startup they're passionate about (we try to filter out the people that want to do a startup for a resume item).

Also, one of the advantage of YC is that if the startup doesn't work out, founders have made a lot of connections in the network and can usually find something interesting to do next.

As I've said before, I think the actual risky path is not pursuing what you really want to do and then spending the rest of your life regretting it.
At home (Firefox 40 on Windows 10) I get 2.34s for HTTP/1.1 and 1.26s for HTTP/2.
Thanks for sharing that. I've seen various demos (speed-accelerated videos) of this before, and this was the first time I've seen it in realtime, happening on the stage. It really... does look real.
Not that I know of, unfortunately--most of what I know I've gleaned from conversations with a brother who works in the field, and from http://realclimate.org/ , which has some decent technical information for a blog (but unfortunately has declined a bit IMO).
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A note to the reader: this article has far more questions than answers. It's still interesting, but know what to expect before you read it. Unlike some, this author is very careful about understanding the limits of what we know.
You argue that, by mathematical definition, a steepening Pareto curve

No, I didn't. The pareto curve is not the reward curve, which is what we were discussing.

Have you considered the possibility that in the actual world the curve doesn't strictly conform to the mathematical one?

I was explicitly assuming your hypothetical was true, and showing it doesn't support your conclusion. That's a conditional claim.

I pointed to an abstraction for illustration, and you made claims based on that abstraction and called it proof of the real world.

No, I called it proof that your argument is bunk. If you want to make an argument based on some complicated theory of socially-based incentives, you need to actually cite such things.

So when you discard the only thing that we've got as "a few cross-country correlations between inequality and other bad things", what exactly are going going to replace that with, your theories?

Tell me; if I can dig up a graph with a better r^2 and a different label on the X axis, will you change your views on inequality? I.e., if I show you this graph, will you say "oops, I'm wrong, inequality is not the issue, I guess $new_x_axis_label is the real problem here?" (Note that I will of course make $new_x_axis_label something socially unacceptable.)

If not, then your argument is simply dishonest. You are criticizing me for being unpersuaded by evidence that you would also find unpersuasive.
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It's not just that Google is giving an answer—it's that Google is taking the other site's answer displaying that. So the other site gets no ad revenue for producing the answer, and the reader gets none of the surrounding context, nor do they gain any familiarity with or trust of the actual source.
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That's the "Not so Fast" book? I actually read that before flash boys. Somehow the narrative from flash boys had penetrated the NYT/Economist meme-spreading network and I had accepted it at face value.

However the microstructure book looks ... Deep - but I guess I need to decide if I am in or out :-)
There are so many reasons why someone wouldn't drink, even beyond just recovering alcoholics. There are various types of medication that react poorly with alcohol. A person might be trying to lose weight. Or maybe they're a pregnant women. Plus, if you're out as a group, someone needs to be the DD. If one's group isn't understanding and accepting of people not drinking, then maybe one needs to find a new group of friends.
Not lawyer-Watson, but there are already an increasing number of automated systems in use for discovery, case law search, etc. This is one of the reasons that there is a glut of lawyers. There's less need for a lot of the highly-paid but entry-level grunt work that newly-minted law school grad associates did historically.
You make many good points, but you're skimming over the key aspect: people who don't make nor invest in content are selling ads on top of said content and they really don't want to share any of the revenue. It's as simple as that.

BTW, tort and common law copyright means that until we decide to get rid of our entire legal system, people are still going to be successful when they sue for damages, so these issues aren't going anywhere.

The silly thing is there is no reason why aggregators, authors and publishers can't just realign their incentives and develop financial structures that work for everyone. We've been here before!
I'd posit that very few who go through YC stunt their career growth even when failing.
Interesting sentence in the article - "Trading systems touch low-level coding, networking (all seven layers of hello OSI Model), APIs, end-user UI, databases, embedded systems, enterprise web frameworks, cutting-edge programming language research, Big Data, state management, etc etc.".

However, whenever the topics of programming in finance come up in HN, I see a general tone of disdain somewhere along the lines of "why do you want to waste your life in finance when you could be starting a start-up in Silicon Valley?". Of course I am generalizing a bit here, but I have always felt that finance provides incredible challenge to technical people - especially those with a background in mathematics or physics and interested in programming.
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Anyone interested in Banksy but doesn't know much about him? Check out "Exit Through the Gift Shop". About half way through it turns into the most hilarious documentary I have ever seen.
Don't forget simplicity - their goal is learning by creating a "super basic CPU" for which you can write "some assembly". Including pipelining in this design would distract from the main purpose.

It would make a nice topic for a follow-up tutorial though.
> Quite successfully, thank you very much.

The many victims of the various eugenics movements of the 19th and 20th centuries might disagree with this sentiment.
Couldn't this just be a form of the "Sports Illustrated cover jinx", that is, regression to the mean?
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What's the underlying principle that requires one to proxy questions through to the place where one originally learned the answer? If I ask you "how far is it from here to Chicago" are you going to just tell me, or are you going to tell me that I can find out in the Rand McNally Deluxe Road Atlas 2016?
The median age of YC founders is 30. These aren't the pliable, simple-minded children of your caricature. Many of them are accomplished entrepreneurs who understand power law dynamics perfectly.

Further, I think nearly every founder who has gone through YC would report that, succeed or fail, they are net-benefited by the experience. Rather than stunting an individual, the exercise of founding a startup is probably one of the best ways to rapidly increase your skill-set over a short time frame.