skysight-inc/HackerNews huggingface dataset:
It doesn't have a heat shield because it simply doesn't go fast enough relative to the atmosphere to need one, it does not 're-enter' the atmosphere at nearly the same horizontal speeds the shuttle did (from full orbital velocity down to landing speed). Even so, the stresses from heating up, cooling down, launch and landing are such that they will likely magnaflux that whole thing from one end to the other just to be sure there aren't any defects, especially until they have more experience, they'll pick it apart and inspect each and every bit to see how well it performed. Later on when they have much more data they might decide to swap out parts only every so many launches if possible.
This is lush. A well-written, deep, technical explanation of a small piece of technology that's become core to Britain's culture. If the author is reading - thank you.
You're comparing the microscopic bitcoin economy to the financial infrastructure that services the entire planet; it's a ridiculous comparison.

How would bitcoin's power consumption stack up if it were tasked with servicing tens of millions of transactions per second?
Actual data from the US: https://cew.georgetown.edu/cew-reports/goodjobsareback/

of the 2.9 million "good jobs" (i.e. full-time, high paying with benefits) created since 2010, 2.8 million have gone to people with college degrees.

It fun to say that you don't need a degree to get a good, high-paying, satisfying job, and there are plenty of anecdotal examples to reference, but the data clearly indicate that the odds are not in your favor if you choose an alternative path, at least in the US. I suspect that software engineering and some related industries might be a little more degree-agnostic, but that's far from the norm.
ITAR[1] means that practically everyone working at SpaceX is either a US citizen or permanent resident.

1. https://en.wikipedia.org/wiki/International_Traffic_in_Arms_...
The Shuttle engines operate on hydrogen which burns very cleanly. RP-1 will leave the engine dirty with coking, so they definitely need to clean re-assemble each engine.

On the other hand, the solid boosters of the Space Shuttle were severely damaged by the impact and corrosion of the sea water, after "recovery" they were essentially a source of parts for new boosters.

Overall, I really hope they can improve re-usability above what the Space Shuttle achieved.
I guess I wasn't clear in my post.

Usually when people say "you can do X in Lisp", they mean that you can integrate a feature into the language.

Don't have list comprehensions? Write a macro.

Don't have "thrush" syntax? Write a macro.

Don't have lazy evaluation? Write a... err. You can't write a macro[1]. You can't write something which completely changes the entire calling semantics of the language. What you can do is make a little sub-language which uses different values and objects from Lisp, but you can't magically make the standard library support lazy evaluation.

Same with types and type inference (a la Haskell).

Same with many other things.

Of course, obviously, you can write a compiler that compiles to Common Lisp, or C, or Scheme, or COBOL. But writing a compiler -- while Lisp is good at that -- isn't really taking advantage of what it usually means for Lisp to be extensible.

[1] For those who are ready to call out the many "lazy" libraries in Common Lisp, perhaps even my own, you're missing the point. You can make a new version of DEFUN and a new version of FUNCALL. But that doesn't make REMOVE-IF, SUBSEQ, MAPCAR, LIST, CONS, etc. lazy. As such, many, if not most, of the benefits that laziness brings, don't get applied to the language at large.
Tonight, SpaceX Will Attempt to Land a Rocket on Solid Ground
That's an impressively ambitious goal. Has SpaceX mentioned any willingness to use returned first stage rockets to launch astronauts? That would be the ultimate expression of their confidence in this approach, though understandably it may be a long ways off.
city life is amazing. 20 minutes commute is the only way I can work 12 hours a day and still have time for friends, family, and hobbies.
Startup holiday video
Amazing.

So how high does the first stage fly?
Planning social engagements with friends. I can easily see who is going, let organisers and everyone else know if they want to that I may not make it, as well as see if there are other engagements that I've already agreed to go to.

I could do this with email and calendars, but I don't know 95% of my friend's email addresses. We talk over SMS and Facebook Messenger. If I wanted to find another one of my friend's I just search for their name, and if they have privacy settings set to only allow friends of friends to search for me - that's OK too!

I don't have to ask a friend for their email address, or their phone number and then ask that person for their email address. I don't have to phone or SMS people to see if they want to come, and I have an easy way to track it.

Sure, we all got along fine before social media. But Facebook has made planning social events ridiculously easy.

I haven't posted on my wall since 2013 and none of my information like age, email, phone number, etc is public. Sure Facebook has access to all sorts of conversations I've had over the years, but so do my local ISP's and data centres.

For anything that I'd truly like to keep private, I use PGP, OTR or chat in person.
In the Boston area, there is no more industrial space left for illegal lofts.

I fully expect bohemians to start illegal squats in unused office parks in the coming years.
The YouTube link should be a replay now; working for me :)
Tracking Moving Trains (with the minimum possible effort)
I had the whole family watch. They'll remember this moment for a long time to come. Well done!
He knows, but the public doesn't and he can say what he wants to twist the perception in his favor and give the impression that the feats were equally challenging.

Not to remove any merit to Blue Origin's achievement, but it's nowhere near what SpaceX just pulled off.
Why the statement from Juniper, then? To try to CYA so they don't end up looking as shitty to the community as RSA did post-bribe?

EDIT: The conspiracy theorist in me would say "this is intentional, too." Changing a value to 31 from 32, or adding a single global assignment in a different function, wouldn't be caught on first review most likely, especially since where the '31' is, 31 is also used all over the code to refer to X9.31.
I have a vague feeling he's being snide to pay Elon back for those mildly snarky tweets back when Blue Origin landed their rocket.

EDIT:

Musk: "Congrats to Jeff Bezos and the BO team for achieving VTOL on their booster"

Musk: "It is, however, important to clear up the difference between "space" and "orbit", as described well by https://what-if.xkcd.com/58/"

http://money.cnn.com/2015/11/24/news/companies/elon-musk-jef...

EDIT2:

NASAWatch: "Gee Jeff @SpaceX just put a bunch of stuff into orbit - again. Something you have yet to figure out how to do."

https://twitter.com/NASAWatch/status/679126712295120896

I'm not sure if they're all joking around, or are there serious ego issues at play here.
There's no foreign employees in SpaceX due to ITAR restrictions.
and geohot
Someone should return the favor whenever he gets into orbit
From what I can gather, it seems like the web will be soon a ghost town. Most people will flock to a handful of web properties.
> I don't buy this anymore.

You should: https://news.ycombinator.com/item?id=10775022
Boom! SpaceX nails a rocket landing
Say what? Scientists build algorithm that detects sarcasm better than humans can
The satellites have their own thrusters and will use that to reposition. Changing your position within a single orbit is fairly cheap - even if you just go a few m/s, with enough time you can space out quite far.
That's my main issue with bitcoins (aside from how they're marketed to anyone; it is most definitely NOT anonymous!).

Instead of 'proof of work' it should require actual, /useful/ work. I think it should be a mix of work /types/ to promote general purpose computing, instead of ASICs. Imagine if a comity decided, and the owners of existing coins voted on, what work was worthy of being included. Folding proteins for medical research, SETI, attacking DRM/bootloader encryption keys... things that benefit the world.
So now how do they secure the booster they landed? Do they have some kind of truck mounted gantry they move into position? There didn't seem to be anything like that near the landing pad. They may want to let the engines cool and any excess propellant boil off before they move in, but they have to have something to hold it, tilt it down to horizontal, and carry it off.
Not sure about iOS, but on Mac OS X calendar: Preferences > General > Show Birthdays Calendar.
Nope. Hip hop is not relevant here. You are not paying attention to the context. I actually have no problem with rappers and hip hip artists using the word in question.

I was making a statement of fact, which is valid no matter how many downvotes I get: this guy just named a domain "nigg.er". That's not a "joke". It doesn't meet any definition of what a joke is. It's using a word to be gratuitously offensive. It doesn't matter what his motivation was; it doesn't rise to the level of a joke. I'm not saying that because I find the word offensive, I'm saying it because simply naming something "nigger" is factually not a joke. I'm not sure what you call it, but I am sure that you don't call it a joke. :)
That YouTube link is a replay too.
I still have the archives for years before gmail, but probably 1/3 of those are in a proprietary format long since not supported that ran on a proprietary OS that ran on proprietary hardware. So that sucks because those old emails are almost certainly more interesting than the current pile of madness.
Why is being careful about your privacy annoying?
I think for the same reason that you might hang out and converse with people. I've unfollowed a lot of people, so my feed has been pruned down to mostly interesting content. I occasionally post something that I think is interesting, relevant, and not widely known. Of course, there's a performative element, but that's true of all social interaction.

I mean, I get that a lot of social media content is narcissistic and vapid, but it's tool that you choose how to use.
The satellites are moving at that speed too....
The satellites themselves can adjust their individual phasing within the same orbit with minimal propellant.
Exactly. Now that they got one back they can actually start the process of figuring out what needs to be done to make the first stage as reusable as possible. It's a long road, but they can finally make some headway now.
They did re-light the engines, curious how many times in a row they can pull that trick before contamination becomes a problem.
Ask HN: Where to get news on latest hardware/product updates?
I'm a mechanical engineer by training but interested in tech stuff. Have been reading HN for a while and wonder if there's something the same or similar to HN, but tailored for hardware/physical product. Thanks!
It's amazing that's acceptable - but hey, publicly funding antibiotic research would be anti-American.

I mean, if you're right, it's better than millions, but it sounds relatively preventable. Or at least we could give it the old college try.
Planetary landing is so hot this year! We've got Space Engineers, Elite: Dangerous, Star Citizen, and now SpaceX!
The first stage goes through at least one full mission duration burn and another ignition before finally launching. So they don't need to be reassembled completely between each firing. I assume they have been repeatedly firing engines for a while now to see how many relights they can get.
On the front page - https://news.ycombinator.com/item?id=10774865
> But I hope lefties realise that it's their suppression of debate that frustrates people and leads them supporting reactionary leaders like Trump.

This has to be the biggest pile of horseshit I've read on HN recently. It's cool if you're not a left-winger yourself, but don't make shit up and then subsequently complain that people aren't treating you fairly because you provide a link elsewhere in your comment and are therefore 'sourced'.

Similarly, the "this is going to be downvoted" is a very adolescent way of debating. If you're upvoted, you 'win', because you scored well, and if you're downvoted, you 'win', because 'I called it; you're all a bunch of reactionaries'.

If you actually want a proper discussion, don't pre-shame your opponents.
> Increasing rates of drug-resistant tuberculosis and STDs aren't due to farm animals.

Do you have any evidence for that or is it just how you think adaptation transmission works; and do you have evidence that - if the former holds - these examples are representative of the general case?
Interestingly, the Dash uses wi-fi controlled by the setup app to be configured with an Android phone, but because the app can't control the wi-fi on an iPhone it uses ultrasonic signals: https://www.amazon.com/gp/help/customer/display.html?nodeId=...

You may need to increase your iPhone volume, since Dash Button uses ultrasonic tones to sync with your iPhone during setup.
Just saw it -- beautiful, I love night launches. I live about 20 miles south of the Cape, so I just have to step outside onto my front lawn and face north :)
This is arguably the greatest achievement in space flight since 1969 and you're going to tell the people who made it happen how they should celebrate?
youtube link for the recap https://www.youtube.com/watch?v=O5bTbVbe4e4
SpaceX Reusable Rocket Story - Successfully Landed – 12/21/2015
FNA – Accuracy-focused XNA4 reimplementation for open platforms
Would you fly passengers on the test flight of a new plane? Yet we do that with rockets. After they've done this a bunch of times to understand any fatigue and thermal degradation problems properly, it should be safer to fly a reused rocket than a new one.
> guarding and moving gold bullions around

I forget where I read it, but when countries and banks buy and sell large amounts of gold bullion they don't usually move it around because it's expensive and inconvenient.

The ownership changes, but it's usually left where it is.
It doesn't take a big change of behavior if there are a lot of people doing it. If everyone reduced spending by just a couple of percent it would radically change the economy and growth forecasts (we'd be in a recession). Lowered growth forecasts would then incentivize savings, further pushing down future growth. There is no Bitcoin Fed that could cut rates and incentivize investment, a Bitcoin dominated world in recession would be a dire place to be.
Then I don't understand. Isn't that some Google service which requires network access?

Also I didn't say "on the go". My home ISP is shit, especially during the day when I guess they think most people won't notice the dropped connections. IRC and occasionally SSH show me the hangups. If my music kept getting cut out I would be pissed.

This is why I hate the modern world. Everyone assumes you have a perfect internet connection.
It's interesting how often people make this mistake.

The NES, like virtually all home computing hardware of the 70s and 80s, operates at 60 hz progressive scan of 200 lines, give or take a few. That is, of course, the same bandwidth of the 525 interlaced lines of broadcast video.

In those days, the horizontal and vertical resolution was bound by RAM capacity rather than pure video signal bandwidth.

In either case, the screen is updated at 60 hz.
FWIW, SpaceX has launched stages after full-length (3 minute plus) burns on the test stand, on a schedule that wouldn't allow time for that kind of teardown. They'll need to do something to clean the engines out eventually, but if several minutes of operation were enough to cause serious gunking, then between those test runs and the multiple runs of the grasshopper test vehicle for landing sequences, they've seen it and know how to deal with it.

(Incidentally, SpaceX is known for keeping some aspect of their operations trade secret, rather than patenting. So, if they had some solvent that dissolved the gunk and simplified the cleanup process, or some such similar trick, it's likely that no one outside the company would know about it.)
All of Wirth's after Modula-2 were GC'd. C programmers would reject a GC'd language, though. So, I stayed with originals that enhanced safety, predictability, readability, and so on while capable of low-level, fast stuff. Wirth's stuff and industrial variants of it often let you do unsafe stuff in dedicated modules for that so you could turn off GC or checks.

Plus they wrote OS's in Modula-2 and Pascal on ancient hardware. Whole platforms. So, they're proven for the use case C programmers often say you need their language for.
The problem sounds like the debts, not the gold. Since, if you accept the debt deflation hypothesis and the idea of debt overhangs, these obviously occur in fiat money systems as well. Gold makes it hard to inflate monetarily, but we observe that catastrophic debts still occur in its absence.
Yay! Successful egg deployment, as well as perfect basket landing :-)

I can't stop smiling!
Can't find any direct quote about it, but I imagine they're thinking about it and considering it in not-so-far future, given that the new Dragon, which is going to be certified to carry astronauts, is designed to be capable to perform an abort at any time during the mission - which means it's supposed to be able to escape from the blast of an exploding first stage :).
It is not so much that it stops people from spending - it is that it makes the real interest rate high relative to the nominal and so discourages borrowing.

Actually with negative interest rates proving possible (almost nobody thought they were a few years ago) if you had a deflationary currency you could always use negative interest rates to control demand. I am sure some smart economist has looked into this.
Trying to land a Rocket — the SpaceX Reusable Rocket Story  https://medium.com/lazy-collections/trying-to-land-a-rocket-...
There is a crane nearby.

The first stage is pretty stable though. The engines are by far the heaviest part, and they're at the very bottom. The legs are also a fairly wide base.

EDIT: On rewatching the broadcast, "Procedure 11.100, section 3" is what they do (I have no idea what that is, but it's what the LD told the landing pad crew to "proceed with")
I agree with this, however one issue is the cost of the interlock. It is about 80 bucks a month from what I can tell. Usually, the only people that I am aware of with the interlock are people that are receiving punishment. I hope to prevent someone getting into that situation to begin with! : )

I think the breathalyzers in the bars is great!
ADHD can't be that new, in less than a decade it turned from less than 1% to 50% in the class room that points at it being a pill pushing campaign.
In the 60's you would get slapped and send to bed without dinner (I'm not condoning beating children just stating a fact).
There's probably a good reason why ADHD all of a sudden sprouted out with the last of the baby boomers / first millennials which decided to let their children roam free which coincided with us deciding the schools should not long discipline children but just feed them facts, and instead of having kids run around till they fall asleep from exhaustion we stuck them in front of the screen fed with nothing but sugar.
A sloth under those conditions would get ADHD.

When half your class is on Ritalin something went wrong, and this only makes things worse for people which actually have learning disabilities as it just gives untrained professionals that should not be diagnosing the color of the sky the ability to pump kids with pills because their parents can't give a frack to discipline them.

I had 2 childhood friends that were "diagnosed" with ADHD and gotten Ritalin since they were in 6th or 7th grade it turned out that both were dyslexic and got frustrated in class because they had hard time reading the bloody assignments and the actual conditions were discovered pretty much after they flunked high school because the only thing that Ritalin did is glue them to a chair.

And yes I see a similar thing with Adult Onset Autism these days.

The entire industry is screwed up I got "diagnosed" as a child with everything from being a genius to an autistic with ADHD only because I could care less about class, this got some what aggravated by the fact that my soviet schooled parents decided to tutor me so a 4th grade student that can solve 2nd order equations in 4th grade and is too bored to do homework or had a vocal argument with his 7th grade science teacher that in he that mass isn't a "fixed amount of matter" that never changes (I got expelled for shoving like 50 xerox copies of a very poor proof into every teachers locker) surely has some disorders bring on the pills.
Wile the truth was that it was just the outcome of 2 soviet parents with several PHD's between them, father was a surgeon, mother was a psychiatrists, sister a clinical psychologist, other kids weren't as lucky because by reading the diagnosis manual if you like taking the VCR apart you now have autism, right...
SpaceX successfully lands its Falcon 9 rocket after launching to space
Working Ridiculously Long Hours Is a Sign That Something Is Wrong
As your link says, "Betteridge's law of headlines is not always true."

The evidence presented seems persuasive, though of course it could be cherry picked from a small number of polls which go one way when most polls go the other way. I don't have the background to judge.

However, with the increasing call to 'run a government like a business', which includes the rise of charter schools outside of democratic control, I see no compelling reason to disagree with the thesis.

Why do you think it's incorrect, other than the construction of the headline as a question?
I can't see why that should be the case. If the bug is reproducible, then can't you create a reduced test case that shows the bug?
I use TuneIn to listen to BBC radio live outside the UK (I'm an expat) so the 320K AAC streams are unavailable to me, only 128K MP3 or 96K AAC.

The 96K AAC stream sounds better to my ears, but I notice that the default in TuneIn is the MP3 stream. I wonder why this is.
The money quote:

> Musk said that a rocket's first stage accounts for three-quarters of its total price tag, so a vehicle with a reusable first stage can be produced at far less cost — assuming the hardware is fully and rapidly reusable.

~75% savings seems like a "best case scenario" number.
Not less than half of their datacenter, but less than all of their datacenter. See the current hash rate here:

https://blockchain.info/charts/hash-rate?timespan=30days&sho...
So let's see... We have an inflationary currency which is behind an increasing divide between the rich and the poor[0], and keeps people hooked on unsustainable growth to just survive, leading to intensifying environmental destruction and wanton consumption of limited resources... It's not like an inflationary currency is necessarily a good idea, either.

[0] before you say that inflation hurts the rich, among other reasons the if inflation didn't hurt the poor, we would never feel the political pressure to increase the minimum wage.
Hehe, me neither. This will be with me for days if not longer. I feel really terribly lucky. When I was 4 my dad got me out of bed to watch the moonshot and the landing, now many years later I get to watch the next real step in the humans-in-space saga.
The public that cares about this achievement (or Blue Origin's) likely understands the difference.
Singapore is in South-East Asia, and was a English colony with massive Chinese immigrants. Singapore was never part of China.
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