skysight-inc/HackerNews huggingface dataset:
A couple of points I would like to make:

* Structural requirements

The hyperloop has much less structural requirements than a traditional train. The reason is that its cars are separated, so it is 'less dense'. If a train goes over an overpass, the overpass has to be engineered to carry the weight of the rail and the train, whereas the hyperloop only has to handle the weight of the tube (30m between pylons at about 8 tons/m is 240 tons plus the negligible weight of the capsule).

The upshot of this is that the pylons can be much less invasive on the real-estate requirements. This is important because now you have more choices with regards to routes, which leads to less curvature and higher speeds. Looking at it from the reverse angle, High Speed Rail design suffered because the massive real-estate requirements imposed such a burden that route choices were compromised, and thus the projected travel time was lengthened.

* Tube manufacture.

It occurs to me that there already exists expertise in manufacturing elevated, highly reliable large diameter steel tubes hundreds of miles long. Oil pipelines. Moreover, these companies perhaps would be interested in diversifying their business away from oil.

* Development

High Speed Rail has issues, but they are political and financial, not technological. We're really just buying the technology from other countries. Much of the cost and the incredibly lengthy construction time for HSR is coming from building overpasses and the foundations for the rail, so far as I can tell.

But hyperloop is something that requires some development. This is a good thing because investors can sell that technology and get some return. It's difficult to attract private funding for HSR, but I can definitely see someone stepping forward to fund the development of the technology.

Pretty much once someone builds the hyperloop demonstration system, you'll know if you have a winner on your hands, but with HSR, you don't know if you'll be successful until the whole thing is built (and with a 2:30 travel time LA->SF, it's not going to be a slam dunk against air).

There are plenty opposed to HSR, but I see very few alternative solutions being proposed. This might be something those opposed to HSR jump onto, and it might get a lot of support quickly.
I think in the short term at least, this is beneficial for Bitcoin, if it's recognized as money, and businesses and "normal" people start trusting to use it without fearing repercussions from the government, as long as they "follow the rules".

This could lead to more centralized exchanges, which again is good in the short term - the more the merrier, so people can easily get Bitcoin with their dollars.

But I think the end game for Bitcoin is to be a "real currency" that gets used everywhere and people get paid in it, to the point where a lot of people won't need to exchange to dollars necessarily.

At that point you could start living entirely with Bitcoins, and you won't need centralized services anymore either. You can just use your own local wallet, whether it's on your PC, smartphone, or NFC ring.

Tracking the transactions through services like Coinbase or Mtgox is obviously going to be trivial for the authorities, since they can just request the data tied to people's names.

But it's going to be a lot harder to see them when you're using local wallets, unless the IRS is still receiving help from the NSA at that point, because you'll probably need something like the mass surveillance system of NSA tracking every transaction from the whole Internet, and using Big Data to identify who's buying what. But hopefully by then we'll fix the NSA "problem".
Thanks for the additional research and of course that makes perfect sense. I shall stop spreading that urban legend.
The weight of a 10' diameter steel tube with 1" wall thickness is 125,000 lbf per 100 feet. Note that does not include the reinforcing braces, that is just the plate. The actual weight could be easily 2-4x greater. It also doesn't include the weight of the solar array.

My bet is that it's not significantly different to compare a light rail (subway-like) system to a hyperloop in terms of weight.
You seem incredibly misinformed. I'm not sure how anyone can be familiar with feminist thought and come to those conclusion. Please don't think that feminist thought places the blame for patriarchy on men, internalized oppression is constantly brought up in feminist literature and the blame falls on men and women alike.

And I'm not saying that you can't criticize feminism, of course you're allowed to. But please be cognizant of the fact there are many different, often times opposing, feminist ideologies. You're criticism of one school of thought does not apply to all feminists, please try to be aware of when you are stereotyping.

You seem pretty angry, and I doubt there's much I can say to make you reconsider your positions. But, I'd like you to do an experiment, go to your nearest Toys R Us and compare the girl's toys and the boy's toys. After making your observations give some deep thought to whether or not gender is a social construct, and whether gender differences are learned or inherited.
Even the most expensive TGV lines, have a per-km cost of around $20m/km in present dollars, and that's high enough to cause controversy. The bulk of the network was built for prices of $2-4m/km at the time, which is about $3-5.5m/km if you adjust for inflation. For a 700-km line like SF-LA, even the $20m outlier cost would work out to only $14 billion. Where's the 8x multiplier coming from? No TGV line has cost >$100m/km, or even close, in 2013 dollars. I am not sure any line in the world has cost that much, even in inhospitable terrain like China's high-speed rail in Tibet, or Japan's high-speed rail through the mountains.
Based solely on hearsay from a current Googler, they're using JNI for code sharing with the JVM, which remains a second class citizen for systems programming at Google.

[edit]: English.
I agree. Referrals are the best ways of finding good engineers. Just because one could (or could not) answer questions correctly on a test doesn't necessarily mean that he or she is a good (or bad) engineer. Everyone has good days and bad days.

There are also plenty of ways of circumventing this. Since a test taker is evaluated not just by his answers, but also by the process of inputting his answers, that itself could also be faked away.

While I don't think the point of this idea is to evaluate the candidate's personality, I'm wondering if the founders thought about this. Is this going to be left to the companies to figure out on their own, or are the founders going to assist in this? What I don't like is the idea of encouraging employers to filter candidates by coding skills first, then personality. As a project manager, I've dealt with my fair share of really intelligent but lazy, egotistical engineers and thinking back I wouldn't really hire them had I known about their personalities earlier. I would rather hire engineers with B+ coding skills and A+ personalities, than engineers with A+ coding skills by B+ personalities.
30 million people donating 200 each...totally doable.
I guess that makes sense.

And after checking a map of the area and realizing farmland there is water limited, not space limited I withdraw my objection.
And patent portfolio.

Depending on where Amazon wants to take Kindle, that could be useful.
perhaps you can pour sections and truck those in, but there's no way in hell you're moving a precast that size on anything that doesn't float.

For scale, you know those 4' by 4' by 8' blocks of cement you see all over the place, used for erosion control and the like? They're called ecology blocks, they're about $20 each FOB the cement plant. You want them shipped? A lowboy can carry two or four at a time without exceeding load limits. When I looked into buying a couple hundred, having them shipped about sixteen miles, it was going to cost hundreds per block to truck it out plus renting a crane to unload/place them.

Those are tiny blocks with almost no rebar, no engineering, no preload, nothing.
If anyone wanted a full list of available options, you can look at the man page for your shell, under PROMPTING (you can type /PROMPTING to search for it). Any other bash variable, or user defined variable will also work.
How well will it fit the obese & large American, something that is around ~%40 of the population now?
How much time do you have in heavy freeway traffic?
The government loan was hardly free. Not only did it incur interest, there was an equity component that nearly kicked in had Tesla not had sufficient funds to pay off the loan early.
When I was 14 I was fed up with kids on my soccer team not wanting to win as much as me. I quit soccer and picked up tennis. Looking back, a large part of my inspiration to pick up tennis was I just wanted to see if anyone could actually learn to do anything. I was never great, and didn't bloom until the end of my junior career, but it did land me a partial scholarship and probably got me into some better schools than my grades and test scores show. Taught me a lot about life though, and really thats how athletes become great.

Another way athletes become great though, in all seriousness, is they hack their bodies with PEDs. Seems to me like sports these days are flooded with it.
How old are you? Have you at any point in your life exhibited any kind of talent for being artistic? I ask this because I don't think someone can grind and learn their way through design as someone can when it comes to development.
Its becoming common now-a-days for recruiter to not to get back to you with one line - "Thank you for sending in your application".

There is no exception. I doubt even if they read application before clicking on "Delete" button.
Macro was my favorite subject! I was lucky enough to take the first year PhD sequence during my last year, which was my first taste of coding =D

I think in industry (anti-trust at least), they stick with the older models because their value has legal precedent, and using new methods would require some more legal hand waving by the attorneys.
Martin Jetpack: 'Quantum leap' over previous model [video]
Awesome, thanks so much for the fast response!
I'm afraid I'd have to agree with the other person. Even IF Larry Page knew about the full extent of the NSA goings on inside Google (and he may very well not know), he is legally obliged to lie to us, and you, about them.

So, Googler, Tell me why you are convinced that Gmail is highly secure and my email is not being snarfed by the NSA?
I love Firefox OS.
Wake me when they actually happen (IE are built and available).

SPUR's data comes from the SF planning department, which is now under tremendous pressure to at least claim they are doing something. Data on the actual ground (IE real estate listings, etc) do not support their claims, as anyone who tries to get a residential unit in SF can tell you. I'd love to know what they consider a "start". It shouldn't take multiple years for a simple residential unit to be completed.

You are also talking about places where it takes months to get a tree removed from your property and requires approval from the "county arborist". It often takes years for people to acquire permits to do remodeling.

California also has significantly different and more stringent energy/building codes from all other places, in areas completely unrelated to things like 'earthquake protection' (or anything reasonably related to California issues)

It absolutely has a high regulatory cost compared to most other places, and past HN, i don't think i've seen anyone dispute this (IE AFAIK, California doesn't dispute it, they simply claim it's worth it)
Someone needs to convince Musk to build this on the east coast of Australia; linking Brisbane-Sydney-Canberra-Melbourne. The Sydney-Melbourne air corridor is one of the busiest in the world (6,795,000 passengers in 2007, vs 6,306,638 for LA-SF in 2009 [1]). We recently had a feasibility study into HSR along the east coast (a condition of Greens support of the current Labor minority government) but it suggested that such a project would be ridiculously expensive and take upwards of 30 years to complete (some say the study was doomed to fail and the numbers are wrong).

The geography is probably less favourable for Hyperloop in the eastern Australia context (e.g. Sydney is in a basin bordered by low mountains north, south and west), whereas the route it would follow in California is mostly flat?

[1] http://en.wikipedia.org/wiki/World's_busiest_passenger_air_r...
I should elaborate a bit on RPC issues: RPC is somewhat of a misnomer, it's a fallacy ("fallacy of distributed computing") to think that a remote method call is the exact same thing as a local method call (anyone who has built a serious system using Java RMI or Spring RPC -- which hacked InvocationContext/used AOP to intercept local method calls and turned them into remote calls -- can confirm this).

Instead successful RPC wrappers tend to follow two patterns:

1) Thin client, with heavy lifting done on a server side proxy written in the same language as the original client. This is the pattern we followed with Voldemort when I was at LinkedIn -- there was a heavy Java RPC client (which had a lot of client logic) and thin clients that (like parts of the Java client) used protobuf over the wire, but contained much less logic.

Problem with this is that it adds an extra hop (latency issue) and at times interface mis-match viz. local clients.

2) Only expose the protocol via the RPC, write a first-class implementation (given the full blown protocol) in major languages. Practically this means native "fat" client (whether in Java or C++) uses the full RPC wire protocol (but may use a higher performance server implementation) and works in the case where major languages are Java (or JVM-based) and C/C++: Python/Ruby/PHP/etc... use Swig or custom extensions to use the C++ client, Java has its own native client built in parallel. If you add another language without FFI to either Java or C/C++ to the mix (or there's significant velocity mismatch between team working on the Java-based vs. C++ based clients/server) maintenance becomes an issue.

This is an approach I was following on my last project at FB with HBase (I've since left FB and am elsewhere, but the work is continuing and will likely be open sourced) for another distributed system -- where the proxy Thrift service always lagged behind the native client and where most heavy C/C++ based clients built their own thrift proxies to talk to HBase. Upstream HBase (and HDFS) -- FB has its own (open sourced) branch -- has also followed a similar approach with converting the native protocol to use protocol buffers for SerDe.
At least he picked someone we can trust to tell the truth, I mean, he wouldn't lie twice, would he?
"I rather give a Cessna to 1M people"

The average driver can't control a vehicle safely in two dimensions, much less three. :-)
Slacker is Hiring an Android Developer Want to Join our Team?
Pure functions model state nicely.

compile :: Source -> Core
optimizer :: Core -> Core
nativeCode :: Core -> Assembly
> Not sure why you think there would be more passengers on LA-SF versus SaoPaolo-Rio

More potential passengers in the latter, more potential passenger revenue in the former.

> Brazilians may be poorer today but they are catching up fast.

Per capita GDP in Brazil is less than 1/3 of that in California, and is increasing at about 1.7%/annum (2.7% GDP growth, 0.9% population growth); assuming no growth in California GDP per capita, it would take Brazil more than 65 years to catch up.
The hottest new thing in recommendations - the why.
I've just reread my comment - I was talking rubbish. Sorry
"Have you seen the 200 foot long billboards in the country beyond town? Did you know that once billboards were only twenty feet long? But cars started rushing by so quickly they had to stretch the advertising out to make it last." -- Ray Bradbury, Fahrenheit 451
It's not clear to me that he is interested in being the one to build it. I think he wants somebody else to.
I think anyone who pays money to be transported from one place to another at high speed is too rich to be cared for by Bill Gates, from his perspective :)
> After making your observations give some deep thought to whether or not gender is a social construct, and whether gender differences are learned or inherited.

Why is this always framed as either/or? Why can't gender differences derive from both society and biology?
How was this discovered? What does the commit change? Who was the transaction with? etc
I'm very curious as to how this non-standard transaction made it into the blockchain. I have two guesses:

1) Whoever did this has access to enough hashing power to mine their own non-standard transactions into blocks.

2) $0.43 is unusually high for a transaction fee. Perhaps this is high enough to incentivize miners to include the tx in a block.
In the US, rail is optimized for freight, not people.
Bus-sized chunks of metal are flying over your head every day. They're called "airliners".
This just uses a literal dollar sign to mark the end of the prompt by default. That means if, like me, you don't put the username in your PS1 - instead relying on $ changing to a # when you run `sudo -s' nothing will happen.

I would suggest adding a "$/#" bubble which adds "\$" to the PS1 string.
Astonished by the people complaining about 1Gbps connections for $70/month just because they can't run it line rate 24/7. It's unreal how quickly humans adjust to getting what they want. The very next minute it's unfair and they want more.

I must be getting old, because I want to scream 'I remember when internet access was charged by the minute! and only at 14.4kbps!'
> Bruce Schneier fails to recognize the critical role security theater plays in keeping people safe.

Understanding that it is theater is enough. You realise nobody needed to prove the emperor had no clothes.

> What does the UK's hundreds-year old behavior regarding spying have to do with the NSA today?

Well you brought it up yourself when you said:

> Also, what makes you think the UK hasn't had a global intelligence network since its inception?

My point was simply that it would be inane to assume that any organisation is required to stay around forever, purely by dint of it existing today - let alone one that is giving every indication of careening out of control. Plenty of people are already calling for Clapper to face consequences.
Nappies.
The most expensive thing in aggregate is the part which surely received the most attention when cost cutting. I think it makes perfect sense it's the dumbest part.
Here's another fairly thorough examination of the 10,000 hour idea:

http://www.sportsscientists.com/2011/08/talent-training-and-...

Key points:

1. Ericsson only published averages. Nobody else has seen the raw data. He didn't even give standard deviation or error bars.

2. "Talented" people get more positive feedback and so practice more.

3. There are so many observable phenotypal inputs and as yet unobserved phenotypal inputs into sports performance that pinning it to a single variable (hours of deliberate practice) is nuts.

My sport is Olympic weightlifting.

Some people will never be Olympic champions, no matter how hard they train. Factors affecting performance include:

* Height.

* Relative anthropometry: long legs are worse than short legs. Long torsos are better than short torsos. Long arms are better for the snatch, worse for the clean and jerk.

* Fast-twitch fibre / slow-twitch fibre ratios.

* Tendon insertion geometry.

* Muscle-belly / tendon ratio.

* Pelvic geometry.

* Soft tissue robustness.

* Natural hormonal environment: ratios, natural circulating testosterone and DHT, amounts of SBHG.

* Placement and density of testosterone receptors in muscle tissue.

* Myostatin production.

These are basic physiological qualities that cannot be changed by any amount of training. While the statistics show that lifters who start younger out-perform lifters who start later (because it's a high-skill sport and childhood neuroplasticity is much higher), the historically and currently dominant countries in weightlifting have gotten there by simply having much larger pools of candidates to find genetic outliers in.
Interesting article, but can we get away from this idea that introvert = shy?

Being an introvert just means that you find different things interesting, not that you're scared of groups.
I fear any replacement will be just as bad.
Ecology blocks: http://www.tworiverssandandgravel.com/wp-content/uploads/201...
In fairness, compared to the people he helps with his philanthropic work at the moment I'd hypothesise those this will affect are fairly "rich".
He said the primary use case was commuting..
People wouldn't be "snatched up off the street" by the NSA either which was the original point of contention.
... and the Tokaido shinkansen carries 1300+ passengers per train, with up to about 15 trains per hour at peak times, so about 20,000 passengers / hour (per direction).

At ~850 passengers / hour, Hyperloop seems like it's operating in another realm entirely....

Ironically, at Musk's "projected" low ticket prices (which granted probably aren't anywhere near realistic) and short travel times, one would expect a huge demand for hyperloop, so its relatively low capacity seems like a serious issue...
If you look at the output scripts of the transaction, this is a patch for the bug that was used to embed the patch in the transaction in the first place. Clever.
Bullshit, all around. If you want to pay your employees more then fine, integrate that into your pricing structure. But do not try and play political correctness games with your customers, because you'll lose.

Me, I tip based on services rendered. Do a perfunctory job and get around 7%. Be reasonably attentive and get 10%. Treat me like you want me to come back and get 15%. Screw things up and take too long to even bring me the check and get nothing.

I could honestly not care at all what persuasion the waitstaff happens to be. I'm looking for food service and that transcends pretty much all the rest of the nonsense. Do that right and profit from it. Don't and, well, torment someone else in your next line of work.
How did you get from the linked page to that?
Legally they are not the same, but culturally...

We are often surprised to see the corruption in other countries, and yet to them paying a government official "To Insure Promptness" is completely normal.

Same thing here: it seems normal to pay someone -who is employed by someone else- to do some various tasks.
I am sorry but I don't see the point of this.
> but they cannot automatically infer the identity of A.

They can certainly walk up the tree though, which is impossible with cash but extraordinarily easy with BTC. In this case B could have a tax bill to pay unless they can prove otherwise.
Density is destiny. Population densities:

407/km² England
256/km² UK
93/km² California
32/km² USA
Unless you'd like to go from Boston to DC without making four stops along the way. In California you have two of the largest metropolitan areas in the country separated by 400 miles of nothing (with apologies to the Central Valley). HSR wins big when it goes fast without stopping, which is exactly the case out here.
The effect of PEDs is also mediated by genetics. Take the grand-daddy of PEDs, testosterone.

Some people respond better to it than others. Some people have more testosterone receptors. Some people aromatise more of it into DHT or estrogen than others. Some people have more SHBG, a protein which disables sex hormones.

Variability in response happens for every PED. The introduction of PEDs has not removed selection, it's just changed the selection function.
Thanks. info@ is fixed, so you can send messages there now. Please send the leaks and we'll plug them.