skysight-inc/HackerNews huggingface dataset:
Musk has addressed this:

Similarly, the proposal briefly discusses thermal expansion: as the steel of the tubes heats in the hot California sun, the metal expands. That expansion needs somewhere to go. In high-speed railways, rails are allowed to overlap at the ends, but that’s not possible in the Hyperloop, and so Musk has a different solution:

“Specially designed slip joints at stations will be able to take any tube length variance due to thermal expansion,” he explained. “This is an ideal location for the thermal expansion joints as the speed is much lower nearby the stations. It thus allows the tube to be smooth and welded along the high speed gliding middle section.”

https://www.theguardian.com/technology/2016/may/12/hyperloop...

I think the hand-wringing over expansion is a bit over the top right now. Seems like its a relatively solved problem and one the Hyperloop team is taking seriously. I imagine the cost of engineering and building giant slip joints is just part of the overall cost package and probably a non-trivial part. I find it hard to believe someone as relatively trustworthy and technical as Musk is selling this concept knowing full well its impossible.

Most likely, this is a solvable problem the same way many difficult problems were solved for cars, planes, and rails during their inception. I read an analysis somewhere that the Wright brothers solved 4 or 5 'hard' problems with their first plane. Their competitors at the time weren't able to solve even one. I'm not saying Hyperloop is guaranteed to work, but declaring it 100% impossible seems overly pessimistic.

My worry is a bit more prosaic, if we gain progressive leadership in congress, we may be looking at Euro-style high speed rail in many US regions, which would invalidate the hyperloop concept. This seems less likely, imo, but by far the saner move.
I'm surprised he wasn't mining bitcoins on the side :)
Is there any material available with a negative expansion coefficient that can be used to offset this?

I ask because that’s how you tend to work around thermal effects in electronics.
Source please. Must learn more.
Or Ekranoplans[2]

[2] https://en.wikipedia.org/wiki/Ekranoplan
No, but I can probably write one. We just use Credstash (rcredstash) for secrets and are done with it. (One of the nice things about not-using-Ansible is the lowered bar to entry of just pulling a library and writing the code you need.)
How do I cope with a cyber security breach?
Crowdfunding for statarb hedge fund trading cryptocurrencies
I've been using KeePass for close to a decade now, and it has never let me down.

Great job!
Compressable joints between each section?
I spend a lot of time reading about network architecture. The problem is "networking" is overrun with vendor specific terms, technology, and products. It's annoying that if I want to learn about fundamental networking concepts, I need to sort through what jargon is referring to universal ideas, and what jargon is referring to a specific vendor ecosystem. Many experts have a tendency to refer to concepts using terms specific to the ecosystem they are familiar with. Often two vendors will refer to the same concept by two entirely different terms (e.g. competing implementations of the same protocol).

Basically, the namespace for networking knowledge is polluted with proprietary crap from cisco, juniper and the like. The rise of SDN is slowly opening up the networking world, but there are quite a few proprietary holdovers. This makes broad learning quite difficult.
in January 2013, it was $13. I bought for $50 worth of bitcoins when one bitcoin was $1000 (I remember comments on HN saying it reached the top of the bubble). Today my "investment" is worth $250. I suppose I'll never sell it anyway and I'll lose my initial $50 eventually but it's pretty fun to see it growing.
Wouldn't this be true for any open source application you don't compile from the source?
I'm not saying it can't work and we shouldn't try our best.

However from what I have seen so far I am quite disappointed as even known issues aren't addressed at all. As if the people involved are blindly going at it instead of working with people who know something about pressure vessels etc.

Sure sometimes you need an outside perspective but not like this.
I remember reading people on Reddit that were saying 2000 by the end of the year. I didn't believe them and it turns out they were wrong just not in the way they expected. Makes me wish I had held onto more.
I am half European/Mexican. I have a full beard and as a result of my heritage, I appear, for the most part, to be Iranian. I live in a city in a liberal state.

I also have an adopted daughter who is almost 100% European descent, red hair and blue eyes. I cannot go anywhere with her by myself without being questioned by people on the street, or the person at the checkout lane, or a few random passersby, about who I am, who she is, how we are associated. It pisses off my wife, who is 100% European as well, to no end.

To have her see this, or hear about what people asked me in any given day, has been a real eye opener. It's easy for people to put away casual racism (or just not allow it to surface) when some guy with dark skin and a beard shows up. That equation seems to change when I'm hauling around my daughter.

If anyone thinks that this is normal, ask yourself: would you do the same thing if you saw a white man walking around with two black or hispanic children?

The number of social disarmaments that I've had to my interactions with people since the turn of the century cause me anxiety and tension. People like to say "that wasn't the experience at my school", but repeated experiments have shown that even in highly liberalized areas with decent racial integration that in fights men with 'Hispanic' or 'Black' sounding names are thought to be more aggressive [1], and that black children receive more severe punishment at the school level, in CA and other non-southern states [2]. Toss in the fact that having a non-white name means that you are in the 50% reduced callback pile at work [3]...

What I'm trying to say is that people who argue that your experiences with race are not true are either of European descent, or they grew up in some goldilocks zone of racial integration that I've yet to experience. They also deny evidence to the contrary, and there is a lot of evidence that even though I'm not beaten up or thrown in prison, we still get the shaft to some extent in our modern society.

[1] https://www.vox.com/2015/10/9/9482537/implicit-bias-names
[2] https://www.nytimes.com/2017/09/25/opinion/black-students-li...
[3] https://www.theguardian.com/world/2016/mar/17/jobs-search-hi...
I personally work at both Wallaroo Labs and am on the Pony core team. A number of engineers at Wallaroo Labs are committers to Pony. We are active members in the Pony community and a large driver of many of those breaking changes to Pony. At least 3/4 of the breaking changes to Pony over the last 9 months came from us at Wallaroo Labs. From our side it's not particularly problematic to make the occassional update.
> Why can't it be something that provides things like convenience or assistance

Because the experience and practice of meditation is so entirely subjective as to make these claims absurd. What does convenience mean to meditation, when all that meditation requires is for you to be present?
Tokenium: my new protocol to solve decentralized exchange flaws
I remember that. And creationists the world around started using that cover as proof they were right.
That's not true. There are plenty of uses of the word "revisionism" with the pejorative connotation that predate the war in Iraq: https://en.m.wikipedia.org/wiki/Historical_revisionism

But even if that weren't the case, it wouldn't really matter, because it's clear what meaning the world has today, both in the general case and in the context of OP's comment.
>But the question is how do people further down the spectrum end up faring, and I can't imagine a raving lunatic would do better, on average, in a big city in a poor country than they would in a similarly big city in a rich country.

You'd be surprised. E.g. rural communities used to treat their "raving lunatics" much better than rich countries with their work schedules, lack of knowing each other, impersonal support networks (e.g. charities and soup kitchens), etc. Consider all the "raving lunatics" that are left to wonder and cater for themselves as homeless, and then are routinely discriminated, beaten up, thrown out of parks, etc. Heck, ordinary citizens feel out of place, get (situationally) depressed, and anxious in such big cities, much less a "lunatic" where it's either homelessness, or some atrocious asylum.

This also means that the people not that far right in the spectrum, might also be better off in those societies -- here the totally OK people already are pressured by the pace, loneliness, etc. We do have more drugs to throw at them, I'll admit to that.
The Ten Commandments of Consulting
Keeping a plain miles-long tube at at least 90% vacuum seems pretty hard to me, especially when needing to deal with evacuations and possible breakages. Why not divide the tubes into discrete sections gated by movable airtight caps that side away while passing through? If one section repressurizes due to evacuation or some other fault, so be it.
By the way, any suggestions on an alternate color scheme? Is the problem that it doesn't contrast enough?
I'm pretty sure from this article and a Google search this person might not have the best advice. He scoured the Internet so you don't have to, seems laughable. Maybe he should've searched for his podcast first because I can't find his podcast show anywhere on the webpage or the Internet.

As an audio professional for over 30 years I have one question for you. What is one thing that people will stop watching/listening before any other? Yup, it's bad sound. Google did some research on this in the beginning of youTube. People are more likely to stop a video with bad sound than bad video quality. So my recommendation is to spend some money on a decent mic and interface (ADC/DAC) than buying a usb microphone. So as I'm recently starting a podcast of my own I decided starting off I wanted an EV RE20. Standard radio mic for like 50 years or something. For a good reason, high quality sound and the proximity effect is minimal. Which is important when talking on a mic, saves time in post eq because of variable distances guests or you when speaking into the mic during an interview. Now not everyone has $499 to drop on a mic right? So they've also made a cheaper version for $260 called the EV-RE320. That sounds pretty freggin good. There's also the Shure SM7B for $399 which is a pretty damn good standard. Standards are there for a reason because that is literally what you're competing against and what your listeners are expecting. You can check out the comparisons on the web that helped me make a decision other than an erroneous article that seems to be way off base to me.

I have found Audition to be extremely limiting is how I would like a DAW workflow to operate. There are too many problems for me to take it seriously but I really don't have the time to go into at the moment. I would however recommend Reaper after using it for the past 3 years on and off. Although it may not have the prettiest UI it sure can do some amazing things with audio routing that kinda makes it ahead of the game in a lot of ways. I have spent many years in front of Protools and although I still have a soft spot for its ease of use, they kinda just started pricing themselves out of the market for me upgrading towards my needs as I'm not a professional studio engineer anymore.

So here's my suggestion within the author's cheap equipment budget of $369-439: Take the $240/yr you're going to spend on Audition and buy the EV-RE320 and Reaper. That leaves you with $40 towards your mixer (if you plan on having multiple guests in your studio) and audio interface which will cost you around another $200. Just my brief ideas of how to spend the money better and get a better sound. Now as far as the content well that's up to you!

https://www.amazon.com/dp/B00U1S4YY4/?tag=lookjar-20

https://www.amazon.com/gp/product/B00KCN83VI/ref=oh_aui_deta...

https://www.amazon.com/dp/B0002E4Z8M/?tag=lookjar-20
“Behind every modern man are 200 energy slaves”, a calculation attributed to Buckminster Fuller and others. You calculate the per capita energy usage divided by a humans daily caloric intake (on human labor eqivalent) to estimate an energy slave count. 3/4ths of the energy comes from fossil fuels which has been storing solar energy for hundreds of thousands of years. Technologynthat harnesses energy creates much of modern GDP.

I doubt we will ever sink back to the lows where as much as 2/3rds the population is slave labor to a ruling class (Rome, Vikings, US South). When fossil fuels become too expensive, we’ll have figured out how to have gotten more efficiency out ofbthe remaing 50 renewable energy slaves.
Indeed. I regularly mix the two up. Thanks. Editing to fix.
ادعية+مستجابة+2018+ادعية+اسلامية+صور+مكتوب+عليها+ادعية+واذكار+اسلامية
Skeleton Screen Loading in Ember.js
Enterprise user here.

Can confirm that we moved all the things to Python 3 (and it was easier than expected). Especially all the data processing pipelines.

No Python 3 is a deal breaker in 2017.
CosmoQuest – make maps of our Solar System
Backers, Tokens and Crowdfunding as a New Form of Commerce Itself
How to Install Laravel 5 with Xampp (Windows)
.NET Core is for cli or server software primarily. Not for gui apps. So probably not. They'll continue with Mono on linux I think.
You say "bad UI," twitter says "increased engagement!"

Potato, potahto.
Hey HN,

I’ve been somewhat a consistent frequenter of this site, but have never openly posted anything. I figured I will open myself up and share some of my ideas with you.

I’ve been following the crowdfunding space for a very long time, and realized that what’s happening is a new class of individuals that we may call “backers”, have showed up as a middle ground between traditional owners and consumers of a firm. Tokens correspondly represent then, a middle ground between products and equity.

I’ve written a Medium post titled "Backers: The Ground Between Owners and Consumers” to fully explain this phenomenon.

Check it out, I’d really appreciate your feedback. Also, if you have a Medium, feel free to follow me, you got my following back.

Thanks!
Bitcoins can and have been seized.
Hi, This is my proposal to solve problems in current protocols like 0x. The aim is to combine the pros of centralized exhanges and decentralized exchanges. I appreciate your opinions. I am mostly interested in finding possible flaws. If you are interested in this, please follow me on twitter (the link is at the bottom of the whitepaper).
SEC | Frontend Developer | NYC or Philadelphia | ONSITE

We're building the US Securities & Exchange Commission’s next generation analytics platforms to keep our markets safe, effective, and trusted. Come build awesome tools to analyze big data. We do a combination of quantitative analysis and good old fashioned product development. At the end of the day, we are creating modern, elegant applications that help our government be more awesome. Join a small team of talented developers, capable researchers, and former finance people that saw the light.

Our stack consists of TypeScript, React, Node, python, & pandas. Looking for frontend developers that are experienced with modern HTML, CSS and TypeScript/JavaScript. We only have to support recent versions of Chrome, so we have the latest web development features available to us (ES7, Flexbox, Grid, etc).

If you're interested, please send your resume and a link to your Git code repository to careers@aretecinc.com
Remaking Lightbeam as a browser extension
"Someone in r/Sweden who works in the field pointed out the severe lack of credibility of the researcher who published this finding so do your due diligence and check your sources before jumping to conclusions"

As others have pointed out, the discovery reported in the post is quite reasonable, given the migratory, raiding and trade patterns between the Arab and Viking worlds in the era discussed. Settlers and converts (of tradition, religion, etc) are also common within intersections of 2 or more cultural groups interacting under any pretext. The post also outlines physical evidence, which has/will presumably be re-examined directly by other researchers to verify and extend lines of inquiry.

Some comments here like Rusanu's are annotated with useful links that you should probably read to understand how unusual the discovery actually is, instead of supporting baseless attacks on the source. It is mildly amazing to see the mental gymnastics being exhibited by some comments (including the ad hominem attack reflected in yours) in quest to refute a completely uncontroversial issue.
Well on that subject, what would be the ideal plant playlist?

"I Heard It Through the Grapevine" - Marvin Gaye
Still not using proper version control, though
We could replace steel with a low coefficient metal matrix composite without sacrificing stiffness or long range strength. It would blow out the cost structure however ;)

Have also heard anecdotally that condensation in the tube could be a real problem. Even at near vacuum, the rapid pressure differentials can cause buildups in front of and behind the speeding vessel.
Machine Learning Explained by Rodney Brooks
Or grow a backbone and date someone you want, regardless of what other think. Life's too short to worry about what racist morons think.
No they didn't hold a gun to their heads, pretty sure. I think it's pretty clear they made it a condition of not dropping them or not raising their premiums.
Metal expansion joints can't hold a vacuum.
This seems ethically dubious at best, and inhumane at worst.
Eh.. no? Mindfulness is something for which the results of trying it are testable. Pascal's Wager is a gamble about what happens beyond the verifiable. They are fundamentally different.
Is there a real market? Are there any known cases where someone has sold $100,000,000 in bitcoin over, say, 3 months?
So much this. Especially when people chime in with some minor detail means it will fail because clearly 'must not have thought of it' if they didnt mention in some 400 word press release.

Its like Elon going into trucking and people saying the range isn't sufficient. The guy is pretty darn smart. I'm confident he understands trucking range and has some solutions, and simply isn't discussing it for secrecy and/or succinctness.
There's something called deterministic compilation:
https://en.wikipedia.org/wiki/Deterministic_compilation

Debian is trying to get reproducible builds for their packages.

I don't know enough about iOS to say anything about that.
You can do that with any number of utilities, though. Why does it have to be built in to KeePass?
American Nazis at Madison Square Garden, 1939
This point is clearly addressed in the paper: The ends of the tube can slide 300 meters next to the station, and the tube is not firmly attached to the pylons but can move to accommodate the expansion.
So is this giving the developers the control instead of - as with Bitcoin - the large mining pools? Is that any better?
Oh, thank you. I was unaware of ssh-keyscan.
Because the value of an ad is as much in knowing what you’re looking at as it showing you something - the JS is there to track and identify, not to show you pretty pictures.
That's right, it frees up $1bn for other uses. This is why automation, ever since the industrial revolution, hasn't lead to persistent mass unemployment. The capital freed up by more efficient industry was used to create new industries and jobs that didn't even exist before. There have been some painful adjustments, but the more flexible an economy is the more rapidly it adjusts. Historically this has been a US strength.
... or XML or TDD or Java or Hadoop or AOP or Perl or Structured Programming or ...

Software quality -- quality of anything -- is a function of how many intelligent, creative, experienced, capable people get involved. Such people are in extremely limited supply. Suppose that a number of such valuable individuals discover and become successful using AIJI technology (Acronym I Just Invented). Then, cargo cult thinking takes hold. The vastly greater number of less capable people see that these rockstar/ninja/wizards use AIJI. They think that if they start using AIJI then they too will produce great things.

Look, just because Jimi Hendrix and other guitar gods play Fender Strats, it doesn't mean that I will become deified just because I pick one up.

The superstars were going to succeed no matter what tools they used.

In the case of Agile: that isn't even technology, it's management. I'm sure we've all been under the thumbs of idiot managers who keep hearing the word "agile", believe that they should use this wondrous new thing, ("think" would be putting it too strongly and optimistically), pick up some vocabulary, and then do the same moronic things they've always done, but now calling it Agile. (Source: worked for a manager who had his daily "Agile" meetings -- I believe they're known as "scrums"? -- and they grew from 15 minutes to half an hour, to an hour to two hours, and that's not counting the time to get the shitty microphone working for the offsite people.)
Sounds promising:

- Resistance to high and very high pressures

- Large movement absorption

- Early leak indication (in case of damage) via standard check hole

- Complete burst resistance

- Possibility of permanent leak monitoring in critical media
True but I can have a hidden bigger wallet
XFactor Ventures Announces First 8 Portfolio Companies
Big feature: Better support for creating 2d games which is awesome! It is always annoying to have to deal with "Too many features" (In thie case, the extra complexity of 3D scenes for 2d games) that you dont need.
> if these Vikings wanted to show allegiance to allah and Ali

I call strawman.

Both article and researcher make no claims further than "cultural influence".
Prison Tattoos-Not Your Mainstream Tattoo
Apologies if I'm wrong, but it sounds like you're not that familiar with Ansible's roles and the public Ansible Galaxy repo for them?

https://galaxy.ansible.com/intro

There are tons of roles available, for just about everything, and the quality isn't always great, but still higher on average than what I've found for most Chef recipes and Puppet modules.

And that's not to mention the very high number of high quality modules that are builtin to Ansible.
I always read the Odyssey (I think the Fitzgerald translation) to my younger high-school age kids (in batches) as part of our home education efforts (8 kids, from birth through high school) and the power and paradoxically absolute modernity of Homer's characters (human nature is unchanging) always held their attention quite well, and was, I hope, rewarding.

Of course, Fitzgerald points out that, no matter the power of the translation, something is seriously lost by not reading the original Greek. One of the sadnesses of the limitations of a chosen life...
So long as and to the extent it remains the case that corporations can be legal persons, it is likely that robots will have de facto if not de jure status as legal persons. All it takes is wrapping the robot in articles of incorporation.

It's worth noting that there are aspects of corporate personhood where the corporate person enjoys more rights than a biological person particularly at political borders.
JODI – Apache is functioning normally
How tragic! Their homes taken from them by a foreign conqueror, their people overthrown and enslaved, they flee to a foreign land, establish a colony … and eventually they're wiped out by the Turks. Sad to think of the cousins of the Beowulf poet, of Ælfric and of Cynewulf expiring on the Anatolian coast.
I wish there was a tech/engineering equivalent to "That's the joke" for circumstances like these.
Almost always, worrying about arrays is premature optimization.