skysight-inc/HackerNews huggingface dataset:
You'd really only have to scan for explosives.

Knives or even guns would only pose a problem to the few passengers in the capsule with you (yeah, you might be able to shoot a hole through the tube, but it would take a LONG TIME for a bullet hole to let in enough air to affect the pressure in a LA-SF-sized tube).

It's not like you can hijack the thing. :-)
"By building a system on pylons, _where_the_tube_is_not_rigidly_fixed_at_any_point"
[...]
"A telescoping tube, similar to the boxy ones used to access airplanes at airports would be needed at the end stations to address the cumulative length change of the tube"

So, the tube is lying loose on the pylons, and he assumes it will keep its shape while expanding.

I think that is highly optimistic for a tube that is a straight line, even more so for one that is curved.

If he manages to accomplish that, the end stations will move over 300 meters, in total. Hopefully, when the tube contracts again, the motion will be reversed perfectly. Otherwise, that end station in LA could slowly move north or south over the years.
So? It needed a section with more polish than the first section for not HN, and a more detailed technical section.
"Sorry but your browser does not support WebGL..." Wait. What?

Apple Mac OS X 10.7.5 Intel
Chrome 28.0.1500.95
The more precisely the server provider defines it, the more they are giving folks a playbook for skirting the rules, and as a result potentially encouraging more overall abuse. You're assuming they'll be "screwing people legitimately... " but as long as the customer's total data consumption isn't excessive, an ISP has no reason to come down on them - the ISP should be happy to just collect their fee.
Coding is a small part of a developer's job. Given a simple task, a programmer can code to it. A software engineer can create a proper design that expands out to solving a wide range of problems, a design that is easy to maintain and flexible enough to deal with problems.

I don't want to see someone's first solution to a problem. I want to know the solution they came up with after 5 mental iterations and a few hallway discussions with peers.
No, this is just back-of-the envelope, admittedly. But the three factors that determine how many people you can move past a given point per unit of time are the frequency of the vehicles, the capacity of the vehicles, and the speed of the vehicles, so if you want to match the throughput of the proposed Hyperloop, but with rail traveling at 164mph, you have to either make the vehicles more frequent or higher-capacity, or both. I would expect rail to be much less frequent, at least if typical rail conventions are followed, meaning you'd need much higher-capacity vehicles, combined with the engines to bring them up to speed (which move along with the train). It doesn't take that much weight to get past what you could reasonably support on a pylon in a median... there's a reason inter-city rail isn't built this way.
Maybe for you. Not for everyone.
I'm one of the co-founders and I'm still saving that quote.

As for the answer to the implicit question...the best people are passed by reference when they're already recognized. We're aiming to help people show that their skills have value when they don't have a reference.

The number is just, well, a pointer to a broader portfolio - and we'll only be making that portfolio more expressive over time.
Rail in California is sadly a total joke.
> 1. Price. They are dirt cheap.

So are iPhones of the earlier generation. Which run fast and have a plenty of apps available.

> 2. HTML. Yes HTML+JavaScript. Every monkey can knock out apps for these, much like you could with MIDP2 / J2ME.

Yup. And they will crawl, not run. And if you want at least to make the walk, you will need to learn many more trick than reference counting (which you don't really use any more since ARC came).

> Hell, this is the scariest thing out there: cheap, easy with the potential to reuse stuff out there.

Nothing scary in the stuff that barely works.

> These WILL be ubiquitous.

Is it a year of Linux desktop yet?
Nope. A casual perusal of Hacker News and reddit will show this mentality is very much alive, and that people believe this is the only way the internet should be. Free, international waters where anything goes and there shouldn't be any government involvement.
I feel the same way. There is always that nagging feeling that you missed a corner case, or there are defects in the 3rd party code that you won't have easy access to.
Isn't BTC's public ledger public? (https://blockchain.info/)

While it's possible to generate a new wallet to mask who the user is, the transaction flow can be traceable. This seems easier to trace than the flow of money through our banking system.
How does unpolished turd which does not even provide polished turd solve anything?
Your last point is the other way around:

Haskell has excellent static reasoning/debugging facilities therefore there is little pressure to make good debugging tools.

I believe purity should make debugging easier, not harder. Laziness should only make performance debugging harder, not correctness debugging.

There is much room for improvement in this space.
I'm happy that at least someone is trying out the 10,000 hour rule empirically: http://thedanplan.com/
Jared Bernstein answers Barry Ritholz on related themes today:

http://jaredbernsteinblog.com/economics-as-market-failure/

It's really hard to tell, especially outside the field, whether someone's computation has found signal and not noise in their data series, or even whether that data series has any significance for different times and different places ...

(You can "Monte Carlo" the past as much as you want, it won't become the future.)

Edit: I probably should have just referenced Sliver's Signal and Noise and left it at that.
><

Thanks. Will be fixed.
This is very serious first proposal.

As a professional mechanical engineer I have worked on high quality steel tubes (nuclear submarines) before. The immediate thing that sticks out to me in this proposal are the tight mechanical tolerances that have to be maintained. Talking about tens of thousandths of an inch tolerances on a 10' diameter tube is not to be dismissed lightly. That is going to be tough to maintain - especially with welding heat distortion. I would image the tubes will be joined with automated friction stir welding or something similiar, but that will still require a fair amount of post weld machining which has its own pitfalls. Not to mention simple thermal expansion and contraction as the temperature changes could change the circularity and inner diameter.

I would be more interested to see a tolerance stack up of those considerations than an FEA model of the concrete pylons. I can gaurentee that we can build concrete pylons capable of holding up a steel tube, that is done all over the country dozens of different uses cases. But can we build a multi-hundred mile long steel tube to the required tolerances?

I would be inclined to trade off efficiency for manufacturability. I.e. maybe a higher internal pressure or larger diameter to make it less sensitive. There should be plenty of power from the solar panels so it doesn't have to be perfectly efficient.

I'm also surprised that the I-5 plan is cheaper than buying private land. I may be naive here, but the pylons really do take away most of the objections from farmers and installing tubes over farmland has to be a lot cheaper than doing construction above a highway. I just look at boondoggle that was the SkyTrain in NYC (tram running over a highway out to JFK airport) and wonder if that is a great option.
You have to get the thing built before you can start charging a premium for it. Without a strong constituency, you can't get a giant infrastructure project off the ground. If your constituency is people like me, who can afford to fly, you've already lost the game.
Git commit allegedly from Satoshi embedded inside a Bitcoin transaction
I can't really see this being any use at all for finding a really talented, experienced developer. Any half-assed developer should be able to do these little puzzles with a little research.

The really hackerish stuff can't be tested for in a format like this.
He makes the point that he doesn't need to block 100 feet from each side of the track, as well as put barriers in place to prevent animal crossing and blocking farmers from getting to the other side of the farm, in the same way power lines today use space. That means he would need some non-farmable area around the track, yes, but that it wouldn't disrupt the farm like a normal HSR track would.
Big difference, angel and VC are not interchangeable in this discussion and the article explicitly mentions VCs, not angels.
There is this proposed extension for anonymity, but I don't think it's very likely it will be implemented:

http://zerocoin.org/
I bet they titled it like that to hide it from prying eyes. That way even if you found the account where it was being stored, you would have no idea it related to hyperloop; and there were probably people looking for this sort of document.
New web app for note-taking and collaboration. Suggestions?
Retina iPad Mini & iPad 5 coming soon
I don't see why they couldn't. You could just leave out one or two rows of seats and have plenty of room for a wheelchair, also extra luggage and package (if no wheelchair was onboard). You could have that in maybe one car out of five or ten, given that a new car arrives every thirty seconds.
Aside from the whole "will they actually build it" debate, I'm worried that if they do, the capsule ceiling won't be high enough for someone fairly tall (let's say 6'5'' or taller) to sit in comfortably. I'd assume the height of the capsule will have some effect on the drag involved, as well as the necessary size of the tube, so it makes sense to make it as short as possible.

Musk himself stands just below 6', so he may not naturally think of us taller folk. I'd hate to have to slouch for the trip, even if it is only projected to be 35 minutes.

edit: dear tall people who have ridden in one of Tesla's cars: how's the headroom in a Model S?
I agree with the sentiment, but its part of the disadvantages of this transport. You cant travel with babies or little kids in them, and you certainly cant do it sick.

However its not such a big flaw, specially to warrant 63billion to alleviate.
So what's the problem? If you violate the ToS and become an unprofitable customer they refuse to keep selling you a connection by disconnecting you.

I guess I don't understand all the complaints along this vein. It's not like providers come back and try to sue you for excess bandwidth usage. They just say 'no thanks we don't want you as a customer'. If you walked into a mcdonalds and ordered 1 small fry and asked for 1000 ketchup packets they would probably do the same. Despite condiments being unlimited.
Firefox OS sandboxing support
It's getting better: http://www.businessinsider.com/microsoft-and-xamarin-getting...
Here is the text of the commit:

From a3a61fef43309b9fb23225df7910b03afc5465b9 Mon Sep 17 00:00:00 2001
From: Satoshi Nakamoto <satoshin@gmx.com>
Date: Mon, 12 Aug 2013 02:28:02 -0200
Subject: [PATCH] Remove (SINGLE|DOUBLE)BYTE

I removed this from Bitcoin in f1e1fb4bdef878c8fc1564fa418d44e7541a7e83
in Sept 7 2010, almost three years ago. Be warned that I have not
actually tested this patch.
---
backends/bitcoind/deserialize.py | 8 +-------
1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/backends/bitcoind/deserialize.py b/backends/bitcoind/deserialize.py
index 6620583..89b9b1b 100644
--- a/backends/bitcoind/deserialize.py
+++ b/backends/bitcoind/deserialize.py
@@ -280,10 +280,8 @@ opcodes = Enumeration("Opcodes", [
"OP_WITHIN", "OP_RIPEMD160", "OP_SHA1", "OP_SHA256", "OP_HASH160",
"OP_HASH256", "OP_CODESEPARATOR", "OP_CHECKSIG", "OP_CHECKSIGVERIFY", "OP_CHECKMULTISIG",
"OP_CHECKMULTISIGVERIFY",
- ("OP_SINGLEBYTE_END", 0xF0),
- ("OP_DOUBLEBYTE_BEGIN", 0xF000),
"OP_PUBKEY", "OP_PUBKEYHASH",
- ("OP_INVALIDOPCODE", 0xFFFF),
+ ("OP_INVALIDOPCODE", 0xFF),
])

@@ -293,10 +291,6 @@ def script_GetOp(bytes):
vch = None
opcode = ord(bytes[i])
i += 1
- if opcode >= opcodes.OP_SINGLEBYTE_END and i < len(bytes):
- opcode <<= 8
- opcode |= ord(bytes[i])
- i += 1

if opcode <= opcodes.OP_PUSHDATA4:
nSize = opcode
--
1.7.9.4
EFF continues awful tradition of confusing personal digital liberty advocacy with lame complaining about not getting things that cost money for "free".
> exchanging currency often isn't taxable either

Exchanging currency often generates "exchange differences" which (often indirectly) increase/decrease the profit.
Better than being faecetious...
Build a virtual machine, run it, have it output a single bit and destroy it.

If you can root their VM blind, without feedback, you win all the challenges.
I've thought about this a bit as a game designer. Basically, teachers have to force (induce extrinsic motivation) students to learn things, because the student has no greater goal (intrinsic motivation) which would flag the knowledge to them as being immediately relevant. If, on the other hand, the student needed to be able to know the sums of large numbers quickly while they had their hands full (for, say, estimating a fair tip as a server in a restaurant), they'd quickly absorb a mental addition algorithm--because they would have created a mental gap, a place where their plans say "and then if only I could--".

The things that should be taught, I think, correlate highly to the types of things students will later wish they knew. These are mostly low-level rules and processes for things which are so "obvious" to everyone else that they're hard to communicate unless you have a background in education. To flip that around, the kinds of things we call "trivia"--things equally simple or obvious, but as easily learned as said (e.g. a state capitol) don't really need school to teach them--as, if someone later feels the need to know, they can just ask anyone, and pick it up on their own. School is mostly a place to impart knowledge that's hard to teach (including to self-teach) if you don't know the specific skills of teaching.
I think competition is good. Soon after babilon.js got released I took a look at their file format and did a loader for three.js. This made me see how much three.js needed some geometry structure refactoring (moving towards a bunch of flat typearrays). I'm slowly working on that but I still need to find a nice API for it [1].

[1] https://github.com/mrdoob/three.js/issues/3672
The two biggest budgeted costs in the latest report I can find (£16B) are stations (£1.7B) and tunnels (£1.4B). (Also noteworthy is that almost £10B of the overall £16B figure is for risk provision.) More directly comparable is the £1B figure for land acquisition: that isn't going to fall by much.
Snowden has no reason to lie; he wouldn't have spoken out and ruined his life without strong moral convictions.

Larry Page has every reason to lie; probably enforced by the US government. The fact Google are operating within the law doesn't mean anything when such open-ended laws as the patriot act exist.
Tagore: "It is not difficult to imagine a mind to which the sequence of things happens not in space but only in time like the sequence of notes in music. For such a mind such conception of reality is akin to the musical reality in which Pythagorean geometry can have no meaning. There is the reality of paper, infinitely different from the reality of literature. For the kind of mind possessed by the moth which eats that paper literature is absolutely non-existent, yet for Man’s mind literature has a greater value of Truth than the paper itself. In a similar manner if there be some Truth which has no sensuous or rational relation to the human mind, it will ever remain as nothing so long as we remain human beings."
I agree. This is great but it won't be built in the US.

We have become risk averse. No grand sweeping visions of building interesting infrastructure like TVA, the Interstate (though that was poorly implemented in many areas), etc.
Infoworld Review: Apache OpenOffice 4 vs. LibreOffice 4.1
No, the Northeast corridor is the clear winner for HSR in the United States.[1]

The difference is, we already have the Acela, so it just needs a speed upgrade.

[1] http://en.wikipedia.org/wiki/Northeast_Megalopolis
This is spot on. When I found out that a fellow entrepreneur had been pushed and pulled around trying to get funding for months without any solid commitment I put two of the angels involved on the spot in a meeting and asked them if I committed a certain sum of money for how much we could count on them. The round closed with 5 investors within a few days.

All it takes is for someone to cross the bridge of commitment and others will follow. The fact that I'm probably two orders of magnitude poorer than the other investors probably helped in embarrassing them to make a move, it was literally peanuts to them and the company went on to moderate success.
They go on strike circa every 20 years [1]. I guess you could call that "way too much", but that seems hyperbolic to me.

[1] http://en.wikipedia.org/wiki/History_of_the_Bay_Area_Rapid_T...
Train regulations are retarded in the US and haven't been reformed for over 50 years. Basically if you plan on having a crossing or sharing track with a freight train you automatically are stuck with the FRA regulations which apply to freight trains and are also pointless. Those regulations require absurd rigidity of rolling stock to the point that train-sets built for those specifications actually are more expensive to maintain, fail more often simply (rolling stock becomes too heavy), and are much more unsafe.

For example FRA requires train rolling stock to withstand 800,000lbs of force on impact without permanent damage. The European requirement on the other hand is less than half of that. The European requirements instead aim for adding "crumple zones" to the cars to absorb energy and protect occupants similar to how automobiles use crumple zones.

This is why there's an obsession in the USA regarding light-rail. Light-rail sidesteps the FRA regulations by creating a separate track and rolling stock that doesn't have crossing with heavy rail.

I believe if we simply reformed FRA regulations we could probably cut all rail development by a sizable chunk as we would be able to buy rolling stock as-is from European and Asian suppliers.

But anyway, back to the point being discussed. A sizable chunk of China's HSR network was built elevated so it is certainly feasible to put today's HSR tech on pylons. But just because you elevate something doesn't magically get you away from Environmental Reviews which I think is another area where a majority of the cost in public works project lies.

Environmental reviews will still be required for Hyperloop. Since it is actually a new system, I would expect it to get even more scrutiny in the public eye because it will sound even more magical and also offend even more people since there won't be any intermediate stops. Remember that much of the California HSR political issues are because central valley cities and towns want an HSR station in their town (of course they don't want to fund the station). So many of these towns basically come to the table and say "we'll give you the land if you give us a station, otherwise we won't help you." The Hyperloop concept basically ignores this argument.

Keep in mind that despite environmental reviews having the word "environment" in them, they are actually also public hearings where the public can voice their opinions which can include things like additional noise and traffic. For example if your project blocks out the beach view of a home-owner's house overlooking the ocean, you can sure bet that they'll be at the environmental review and give you an earful about how you can't build your tube/track/freeway/skyscraper/windmill there. Yes that's a bit of hyperbole but that's basically how the environmental review phase is abused.

Because of that, I've come to the conclusion that we won't have any significant improvement in infrastructure in this country until CEQA/NEPA are reformed to allow not just public entities to build infrastructure, but also private entities as well.
The tube is steel, shouldn't be a problem. The electronics are only a small fraction of the cost. It is mostly just the cost of the tube, pylons, and land.
Uh, the number above is $70b and the TGV was built 30+ years ago so you could at least double that number based on inflation.
> I also don't know why I should desire to work at company $q which is has a completely incompetent hiring department.

The pendulum is swung our way right now. Put yourself in the position of someone going for a job in a market that's tight and competitive.

(Like trying to rent a place in Sydney or NYC, they can discard you and there'll be plenty of people left lining up to take your place.)
Like so many things in an ideal world he's right. However you can't get there from here. Far too many employers in tipping services discount the employees pay to where the tips make the take home approach a living wage. Getting those employers to increase the cost of their services to cover lost tips with extra wages is not the least bit realistic.
Based on the title, I was hoping Satoshi Nakamoto had been subpoenaed.
To add to your point about going slower: You can also attend your professors' office hours and dig deeper into the subjects your classmates are forcing you to learn so slowly. Depending on the course, they'll often have additional reading you can do on any given subject being covered. As a bonus, your professors will love you.
Hey xianshou, I've been trying to figure out how to privately message you guys about this, but your info@hackermeter.com email doesn't seem to be working. Your online code editor is leaking environment variables pretty severely; stuff like API keys.
People claiming BTC has no inherent value aren't talking about the general concept or code—they're referring to this particular blockchain.
However, BTC is just a great example that might find followers who will make it hmmmm... more anonymous.

Money has just two functions:
(1) It has to maintain its value over time
(2) People must accept it as means of setting payments

BTC seems to meet both.

It's not anonymous "enough", but I guess this could be fixed with another iteration. (another electronic currency).

It would be great for the world to have more currencies than the monopolistic currencies enforced by the modern states (fiat currencies). Just to own something that doesn't have its monetary base doubled in 4 years, would be awesome! (USD base rose two times from 2008 to 2012).
You read way too much into my comment. I never said that there is anything wrong with issuing a weak statement. I prefer that to lies and promises which you cannot hold.
A perfect draft is negligibly different from a free ride. A ruleset which allows drafting categorically without specifying precise forms will asymptotically approach a perfect draft. A ruleset which does specify precise forms is testing those forms, again, not much to do with cycling.
How about Web OS though?
Just remember people, the real future of travel is SpaceX, not Hyperloop.

The final frontier is space, not San Fransisco.

(I am wide eyed and crazy about the Hyperloop)
Thanks for the critiques, and yes, it's not an easy problem.

There are countermeasures. For instance, who said we'll let you see the whole question bank? And if you type a close enough approximation, out come the plagiarism checkers.

But when somebody's gone to the trouble to make a database online of every problem, I'm happy, because if that's so we must be successful enough that we have plenty more resources to game their gaming.