skysight-inc/HackerNews huggingface dataset:
LH2 is also super cryogenic. LOX and even liquid methane have boiling points higher than LN2. You can build launchers with them without even bothering to insulate the tanks, because the boiloff is so marginal over the duration of the launch. Whereas LH2 absolutely requires a lot of insulation, because it needs to be much, much colder. Worse yet, because of the super low density of LH2 you can't afford even a small amount of boiloff because that hurts your mass fraction immensely, and if you have a LOX/LH2 vehicle you've probably scraped and scrabbled for what meager mass fraction you've managed to achieve (through advanced alloys and so forth). One particular consequence of the use of LH2 with the Shuttle was that it resulted in an ice covered and foam insulated enormous external tank cheek-by-jowl with the delicate TPS coated underbelly of the orbiter during launch, as the vehicle rammed through the air at transonic then supersonic then hypersonic speeds.

Another consequence of the LH2 choice for the Shuttle is that it didn't have enough thrust at sea level to get off the pad, so it needed high-thrust, low-cost boosters as a 0th stage. Solid rockets being the obvious go-to solution, those got used.

In a very real way the choice to use LH2 resulted not just in much of the cost and complexity of the Shuttle system but also the death of 2 crews and the loss of 2 orbiters.
Foreign nonimmigrant workers should be as eligible for social assistance as anyone else. H1B workers pay almost exactly the same federal, state, and local taxes as citizens and permanent residents. In general, restrictive visa rules are a form of protectionism, where the government arbitrarily assigns financial benefits and unequal opportunities in favor of citizens.

[edit: wrong usage of 'immigrants', changed to 'nonimmigrant']
So on an unrelated note, you attack my name ad hominem. Thanks man.
Hi. I made a post in another branch of this thread about our startup.

https://news.ycombinator.com/item?id=7711628

You might be interested to know that we have pilot projects with enterprise clients to introduce informal learning, training, and tacit knowledge collection to the workplace with our app. I'd love to answer any questions you may have.
No, Tech Isn’t the Only Part of the Economy That’s Growing
What does Upcoming.org do better than Facebook, Google+, and Meetup.com?
Show HN: Product Hit – Industry pros tell you about best features for your app
Maybe the issue is that markets that don't take advantage of technology much will be slow to adopt new technology (seems like that would be the reason why they have not taken advantage of technology in the first place).

Self-tracking sounds like a cool idea, but I have used self tracking websites and apps before. In my experience, I just get lazy or forget, so I have never used on more than a month. I think it is just too much hassle and most people don't like the inconvenience of having to enter data about themselves. Do you use your own platforms in your daily life?

I agree with andkon about searching for a purpose that is personal. That, in and of itself, would drive you if it were a worthy cause. I'd say pursue an idea to which you would dedicate your entire life (or at least the next ten years, as Sam Altman has said).
This is a standard textbook on computer architecture across many universities in the US (and if my students are right, outside it as well). So it might be worth a read.

If this is absolutely the first time you are looking at architecture, http://www.amazon.com/Computer-Organization-Design-Fifth-Arc... by the same authors might be a easier entry point.
Flow-based programming is already common in enterprise finance. It's a large part of my job. Enterprise fbp solutions are extremely expensive and sometimes secretive (ex. Ab Initio), so it's interesting to see this become more mainstream.
You can enable logging XMLHttpRequests in dev tools settings (gears icon on bottom-right edge) -> console
Super Sync Sports
Because the average user and the vast majority of users can't use your straightforward and easy UI without explicit instructions because they don't understand any of it.

If they're not going to use it or understand it, why spend time on it?

The model is moving to ISP-controlled network hardware anyway.

All new Comcast modems are remotely manageable by Comcast and they enable features that customers have to call Comcast to disable, as Comcast has better access to the modem firmware than the end user.
His track record. Bezos did the same thing the night before Cyber Monday last year with his drone story in order to capture the news cycle for the day and get in front of consumers.
"Then they spent a week or two in cold soak on orbit."

That downplays the viciousness of that environment, "The atmosphere in low Earth orbit is comprised of about 96% atomic oxygen." (http://www.nasa.gov/topics/technology/features/atomic_oxygen...), it's truly corrosive stuff.

I wouldn't be surprised to learn at least one component of the SSME was, or was initially, susceptible to it. A look at more hits from https://www.google.com/search?q=atomic+oxygen+space+shuttle could be instructive.
Most of the new tools are tiny feature additions eg: the box model editing, copy as curl but will save ton of dev time wasted in doing it the old way.

FF for the win :D
Hi, was wondering if functional language and Java peeps can speak to the performance Java 8's stream(...); curious if the performance of using lambda expressions hold up against say using the old for loops and also whether they do any caching or build internal lookup tables when you do anyMatch(...) or something similar on a subfield of a object.

Also for any C# peeps who already have had experiences using lambda expressions on the awesome .net platform. How was performance there?
It's not "bashing of the military". The Air Force didn't want the Shuttle, but once they were forced into it, they wanted to make it useful to them. The fault lies with the people who forced two organizations with widely different goals to come up with a single vehicle that worked for both of them.

I don't understand your incredulity at my reaction. What exactly did you think was going to happen when you showed up making an effectively anonymous comment saying, "no, that's wrong, believe my 30-year-old memories over the official history"?
This rib on Sama was in my opinion taken out of context too much. But then sama's statement; if it were made to the non-tech population would be disingenuous. However it was made at a tech event, so wasn't to be misinterpreted.
And when they mentioned food service; I thought all those food service apps, loyalty programmes, CRMs and all the technical hardware
I was going to ask how pypy performed on their original python code but it looks like gevent doesn't support it yet (or didn't at the time).
The page says : ...An open API, an embrace of open standards, and a belief that your data belongs to you...
PaintCode 2
I don't think this is an especially good article, and I don't much like the term "viral" in this context since it seems to be being used for propaganda purposes.

There's no reason why businesses can't use software under copyleft licenses. The copyleft licenses are intended to ensure that systems produced for the public always remain available to the public and don't get turned into closed secret systems available only to the privileged. In economics terms it's a kind of free rider problem - how to stop a common resource from being parasitised.
Risks B2B companies should avoid with in-house sales prospecting
At least he went fast from the time of diagnosis. If I get cancer, that's how I want to go: in a few months time from diagnosis. I don't want to spend several years being tortured with anxiety and fear and pain.
Yes, as a self taught programmer I have started to play with these on my own and would love an explanation of these to help me along instead of hacking together code based on old tutorials.
>Companies like Comcast have no interest in slowing down web site traffic

You can't think of a few sites and services that TV cable providers would like to slow down? The issue isn't that the general web will get slower, but rather that cable companies will become the arbiters of which services survive and prosper.
The impression I got from "don't roll your own crypto" (especially after the Debian key bug thing) was that crypto code was so nuanced and complicated that even if you thought something was a bug, you were likely to be horribly wrong for really complex reasons outside the realm of understanding of anyone who wasn't an expert, and everyone would laugh at you for even bringing it up.

After an entire webpage was created to ridicule the Debian developers for how stupid they were when they changed something in OpenSSL's code in their distro's version (complete with references to Dilbert strips about faulty random number generators), I just assumed that I shouldn't even bother trying to look at OpenSSL's code (and especially not try to send patches or ask questions on their mailing list) unless I was willing to make a lifestyle out of it, lest I get ridiculed in the same way (but probably not at Debian's magnitude). I wasn't willing to make a lifestyle out of it.
I wish they still made the galaxy player. I'd love to have an android device that was a smartphone in all senses except for the phone.
Btw. Alibaba Group is so much more, not only one site, it is Amazon of China! http://www.examinechina.com/blog/alibaba-group/ - infographic w/ their other ventures (Alipay, clon of paypal etc.)
I had to audit a web app and the back end code was all written in Erlang. I had never seen the language in use before, so it took me a little while to get the hang of reading it.

Now that I've spent some time playing around with it, I think I like Erlang better than I like Haskell; I used to think I disliked dynamic typing but it turns out I just don't like the way Ruby handles it. Erlang feels really good to write code in, and it feels a bit less finicky than Haskell is.

If anybody wants to try functional programming and feels like they just can't get along with Haskell, I'd definitely recommend you give Erlang a try. It's not great at everything but I'd highly recommend it as something to try.
I'm self taught and I've been wanting to read something like that.
I'll take you up on that sometime soon hopefully. I'm a bit far from the bay area atm.

What is the data source?
They're shutting the p2p network down: http://www.digitaltrends.com/music/spotify-shuts-p2p-network...
I'm painfully aware of just what lengths telcos will go to to press the last bit of (downstream) bandwidth out of the taxpayer funded land line infrastructure they have been gifted. Thats what I'm saying: they have no interest in investing. Who will wake them up and tell them that no, you can't bridge another 20 years of progress on fucking bell wire? Do we like send them postcards explaining the Shannon-Hartley theorem?

But the terrible state of last-mile technology in the field isn't even what this is about. Netflix servers and the intermediaries they peer with are not in a shed in Nebraska with data coming in over microwave. Telcos don't invest in the last mile where they would have to create actual infrastructure, they don't invest where high technology rules in the heart of data exchanges all over the world.

(Of course ethernet isn't the relevant benchmark here, but at that time it wasn't just about what you could do over a hundred feet of copper, but also at what speed systems could actually communicate.)
Not really. What the world thinks of tech is pets.com. There was no clarification that tech isn't only apps and websites.
Thats why they misinterpreted Sama
Thanks, now I remember seeing nand2tetris [book companion site] on HN.

http://www.nand2tetris.org/

It's been reposted since.

[https://hn.algolia.com/?q=nandtetris#!/story/forever/0/nandt...
Show HN: Comment on on-demand TV as if everyone is watching at the same time
How Tunein Radio Plans To Turn 50 Million Passive Users Into Engaged Followers
Doodle Jump as a metric for failure tolerance
Definitely interested in this. I think a common problem with a lot of people, even people that are taught from a book, is that you tend to get 'stuck' at the layer of abstraction you first learned.

People that don't want to develop their skills leave it at that whereas people that care look a little deeper and say 'oh, my knowledge has some pretty significant gaps...'

You can see this sentiment in a lot of the comments: everyone says 'I feel like I'm missing something.'

In my case, that realization came after I started doing some hobby electronics projects: once you start seeing how physical hardware interacts it set off a chain reaction where I realized that my knowledge was really deficient as to how you could go from such a low level to the level of abstraction with which I'm familiar.
Joel, one can look up the domains that he owns by searching Google with this query:
site:whois.domaintools.com "site owner"

Where the "site owner" is someone's name. You can also use this same search and use someone's email address, as well. Or any of the data that shows up in whois, such as an address.
Is there an Ubuntu repo for Aurora that I'm missing or do I need to use the tarball.
Note that something like this is actually part of C99 (but not of C++ - the C++ grammar was apparently too tortured to support this):

struct example_t {
int foo, bar, baz;
} example = {
.foo = 1,
.bar = 42,
};
/* unnamed members are implicitly set to 0 / NULL */
assert(example.baz == 0);

combined with compound literals, you can do stuff like

example = (struct example_t){
.foo = 2,
.baz = 1
};
assert(example_cmp(&example,
&(struct example_t){ .foo = 2 }) == 0);

It's one of C99's neater features, I think. I can imagine C++ programmers liking something like iod.
I completely understand how domain name transfers work. I've done plenty of them. Just because you're a big slow company doesn't mean that we as consumers should just shrug it off as "business as usual". The domain market is a mess specifically for the reason that nobody has built a better solution in ten years. When I purchased https://www.uncover.com back in ~2004 it was the same process as it is today. That's just not right ten years later.
We're not using a framework. This is a tiny component and the rest of Disqus is still Django.
While they can't discriminate between types of traffic on a VPN, they can throttle all VPN traffic, and react to higher VPN bandwidth use. And probably will, if allowed to.
c-base will be a fun venue, esp. with food and drink included
I bought this camera several months ago and I just want to chime in and say it's takes some AMAZING pictures. For all of the complaints about how bad Samsung's software is, its UI is a lot more intuitive than what I've come to expect from most cameras. The vulnerabilities they mention seem akin to what you get from connecting most printers to your network.
Yep, that too. "dm2_register_form_name_input" for example. You could probably mix upper/lowercase to format it better but for some reason I don't like to mix them, just personal preference.

I avoid dashes because the text editor I use doesn't select them as a whole word when I double click them.
To be fair, there were some optimizations that were made as well. Everyone does that, right? :)

But overall, specifically our realtime service is a hybrid of CPU intensive tasks + lots of network IO. gevent was handling the network io without an issue, but at higher contention, the CPU was choking everything. Switching over to Go removed that contention for us, which was the primary issue that we were seeing.
> the actual instructions you're giving to the machine are very far removed from what the computer is doing. Who knows how much code is actually executed, how deep the rabbit hole goes...

The same criticism can apply to Java. But it's not a particularly good criticism. Unless you're interested in quantum physics, you really don't want to know what the machine is "really doing". You want to have useful abstractions that you can rely on.

The rabbit hole goes very deep indeed, and a lot of concepts that programmers treat as concrete are themselves abstractions that hide a lot of complexity.

The difference in level of abstraction between Java and Haskell is much smaller than the difference from either of them to what the actual machine is doing. In both cases you have a compiler, a language runtime, an OS & kernel, and processor microcode in between you and "the metal". Actually Java has one extra step, because javac emits bytecode that needs to run in the JVM, whereas ghc emits binaries that can be run directly by the operating system.

(Your comment about O(n^2) in time is beside the point -- quicksort is always worst case O(n^2), so it wouldn't be quicksort otherwise. All the implementations we're talking about have that same asymptotic behavior. The problem with the naive Haskell implementation isn't the big-O time, it's the big-O memory, which went from O(1) to more like O(n log n).)
Those graphs are pretty misleading. In the first one, manufacturing jobs rose from 11,500 to 12,100 over 4 years, or 5% growth over that period. The graph makes it look like roughly 1000% growth.
What surprised me more was that the Canary Islands was one of the first markets for IKEA (before 1985). I mean, the Canary Islands before Madrid or New York? WTF? I can only assume they were using as a test market, like Kansas City for Google Fiber, but still... wow!
I assure you, I built this in a week. :)
I agree that the "charity" definition is somewhat out of place here, but there's nothing with being a not for profit with definite goals -- the stated goal of "Innovation in the field of architectural and interior design" to me sounds a lot more solid than most other companies that are in it for a quick buck.

Basically, society has decided that charities are nice and therefore deserve a competitive boost in form of tax exempts. Now It has to decide how nice are non-profits with a little more care.
Kloudless Makes Connecting Apps To Multiple Cloud Storage APIs Easier
Consider running 'parallel --bibtex' once.
This is nitpicky, but Python threads are kernel threads. It's the GIL that restricts CPython to a single core.

OTOH goroutines are green threads multiplexed onto kernel threads (aka N:M thread model).
Non-immigrant workers do pay the same taxes as citizens, however, they don't pay them over the same time period.

If a citizen starts working at 18, gets laid off at 32 and doesn't find another job until 34, that's much cheaper than a non-immigrant who comes to the US at 32 and ending up on unemployment at 34 for 2 years before going back home.
You'll have to be more specific, there's too much ambiguity in what you've said. Are you talking about the SRBs? If so then you're just being silly, dumping rockets in the ocean is obviously bad for them. Also, the "engine" for an SRB is just a nozzle, there's not really anything to it.
The present version of Collections.sort is actually a Timsort[1] for non-primitives.
[1]:http://bugs.python.org/file4451/timsort.txt
"This is why the current status quo has worked for so long: ISPs have no way to legally make profits out of "premium" traffic, so they (generally) don't apply outrageous QoS measures. Money is the only incentive, and removing that incentive solves the problem without the need for active policing."

And because they weren't allowed to charge extra for "premium" traffic, they essentially switched over to the over-subscription model in order to make profit. The tighter you squeeze, the stronger it oozes out the sides. And never in the place or way you wish it would!!
I must object to your use of the word "sailplane". The Shuttle was a glider. A sailplane is a glider that can soar by climbing in rising air.

Anyway, you are right. The amazing thing about Falcon 9R is just how little was added to the standard Falcon 9. Slap some legs on it and give it some fancy software and call it a day, pretty much. It's a completely different world from custom-designing a reusable spaceplane from scratch.
How about we block comcast and the fcc from accessing google. See how they like it.
I am having a hard time following your logic. If you wanted people to pay you 6 hours a day to write code, then I am sure you could get great pay working as a programmer.

I think the better question to ask is, "What problem am I solving for my [potential] customers that is worth them paying for it?" (rather than "how do I get them to pay?" The former is a more sustainable business philosophy)

And I am pretty sure market fit and quality of the product are not mutually exclusive. They go hand in hand.
I would be interested in such.
I don't know. You'd need to ask the Supreme Court about that. But I don't think that they ruled that the land was exempt from all California building codes and such.
Probably talking about the in car infotainment system.
loving the Arduino 101
The main thing that drove me back to Chrome for web dev was the performance. Firefox would hang for ~30 seconds trying to load source maps for our 150+ modules. Since it's single-threaded, this locks up the entire UI every time our app loads with dev tools open. And if it pauses on an exception during this 30 seconds, good luck trying to do anything for the next five minutes.
For me, it felt comfortable writing Go, considering I've been mostly writing Python for the past 8 years. So the transition was a lot more natural, compared to using Scala or Erlang or anything else.

Again, this is my subjective opinion, and this is why we chose to use Go for our new stuff instead of something different.
By using a middleman, he know that he won't get scammed: either he get the domain, or the money back.

Also, in his case, the price was fixed. Should he email the owner directly, the owner can ask for a different price based on who asked (i.e, if you're well known, a simple google search can be useful to see who you are and if you're likely to buy at a higher price 499 vs 4999.)
You do realize that SpaceX is only running tests of the flight profile when they are "landing" the F9 first stage in the ocean, right? They aren't actually trying to recover the boosters so they can reuse them, they would just like to get more data. Actual reuse will involve returning the first stage to land, where it will make a controlled, powered landing.
Don't use non-stick woks ;) They are supposed to be bare steel seasoned like cast-iron pans.
Recommended Ubuntu LTS 12.04 is too old, now that next LTS, 14.04 is already out.

Which version of Ubuntu did you use ? Howz the experience ?
Indeed, but he does mention it briefly in the beginning of the video!