skysight-inc/HackerNews huggingface dataset:
Do you mean the same Elon who offers to license Tesla's patents for free[1] and who is regularly quoted as actively welcoming competition in the EV space?[2]

1 https://www.tesla.com/blog/all-our-patent-are-belong-you

2 http://bgr.com/2017/09/25/tesla-vs-mercedes-elon-musk-not-im..., https://www.fool.com/investing/general/2015/09/27/tesla-ceo-...
There's actually a lot of water in the mantle of the Earth. There's something like 3x the current ocean volume trapped in the mantle, and there are theories that pressure differentials cause this water to escape as gaseous water escapes from the atmosphere. It would explain why the ocean happens to be approximately the height of the continental shelf, and always has been. Under this theory the water simply emerged as the Earth cooled from the impact. The Moon, on the other hand, would be missing this water as the debris was mostly stripped of water content as it accreted.
Who Killed the Duke of Dunsmore?
"but they need to fix their marketing"... Indeed, why would anyone name a vehicle that catapults you across the Atlantic as the sound of an explosion?
I'm pretty sure taking your foot entirely off the gas pedal when in "L" mode actually activates the brake lights.
If you have your routine down, fly during the work week (most business travel), and have precheck you can pretty reliably have your wait down to 45 minutes. I fly a lot and usually breeze through the airport.
A navigation system is invented using inertial signals
seems like a lazy conclusion. maybe our model doesnt account for the data.
If you buy an EV, you should be happy with its range when you buy it. Like laptops and cellphones, that will degrade as all batteries do. But also like laptops and cellphones, when you replace that battery down the road, it is unlikely you'll get an upgrade. You'll get the same range.

At least that was the case with my 2013 Leaf with its 85 mile range. I had it in mind that when it came for a new battery I'd get maybe a 10% upgrade. While the new batteries mechanically fit, they are somehow incompatible. FWIW, my 2013 is pretty good as Leafs go. Down one bar.

But if the range is 150 miles or better, I don't think that matters as much. I think buying used EVs in the future will be a thing. Just not the 2013 Leaf.

Other than that, I'm sold on EVs. I'd never buy a hybrid or gas car again.
There are hundreds if not thousands of social media platforms designed for learning and intellectual collaboration, many of which are as or more effective than universities. Wikipedia itself is a social media platform. I think there is some truth in what the author is saying, but it's also completely lacking in nuance.
Redditization of HN, ladies and gentlemen. Jokes/Puns will ruin this place.
Hence my last clause.
For anyone interested in this subject - and how sugars and carbs can _potentially_ harm your overall emotional and physical well-being and lead to obesity - I'd recommend "Why we get fat" by Gary Taubes.

It has a surprisingly healthy dose of scientific studies condensed for the layman, and some historical context as well.
Another anecdote; your comment is the only one I've ever noticed that appears to be defending Slack. From an outsider looking in, I'm not sure why it is so popular.
X3 Bar- an exercise equipment startup
Don’t know why you are being downvoted- this is the exact reason I bought a Mac, can totally sympathize. I hear the dell and thinkpad have this problem solved from the driver point of view at least though.
"pure market forces" won't take over until the negative externality of pollution is properly priced.
> the U.S. must play theirs

Or, as the far stronger side, the US could de-escalate. Not only is this the less-risky option, but it would also garner global respect/admiration for the US - something that has been in short supply for a long time.
Yes, and it's one of the oldest and seriously touted plans for lunar settlement. Apollo 15 landed next to and studied a collapsed lava tube, so we even have ground truth here.
I might have missed it. Which line implies that?

Additionally how does that turn the car insurance world upside down?
For passengers, yes. Workers, no.

The Concord had 12-15uSv/hr [1] (2-3x a long haul flight). The lower bound and best case, workers are fine. Upper bound and European (which are stricter than American, but we're talking international flights) standards are 1mSv (whole body) or 50mSv (effective to skin) [2]. So we're between 4166hrs/yr and 66.6hrs/yr working that would be allowed.

Because it is international they'd probably go with the lowest common denominator, at 1mSv/yr dosage allowed (50mSv/yr for American radiation workers, 150 for Astronauts). And we're just talking flight, not adding the nominal background radiation, which is going to reduce the number of hours even more.

So in short, no, the extra radiation exposure at those altitudes is not minor. It has to be considered if you are going to hire people to fly your plane and attend to your passengers. Airlines already consider radiation exposure. No one wants to do massive medical payouts 30 years from now.

[1] http://aviationknowledge.wikidot.com/aviation:in-flight-heal...

[2] http://www.radioactivity.eu.com/site/pages/Doses_Limits.htm

Addendum: 1Sv in a year is a 5.5% increase of cancer over your entire lifetime. 1Sv in an hour will probably kill you.
Even if they were well compensated the Chinese govt is very good at convincing people to leak or share IP with promises of huge cash rewards or career opportunities within national companies.

I'd imagine Musk would be wary of this and put the proper controls in place.
It's even worse in Europe. There the Volt is called the Ampera and the Bolt is called the Ampera-E... even though it's a completely unrelated design.
The historical record does seem to indicate, at least to my reading, that illiterate people are at a significant disadvantage when it comes to engaging in high-level rational thought.

Writing things down doesn't just store and transmit information, it forces an author to crystallize and review their arguments. Writing certainly makes me more rational.

Those societies that never developed writing did have oral traditions with lots of "human knowledge and culture" but neither of these things are rational thought. Most oral traditions are rich with culture, but shot through with extreme irrationalism, exaggeration, fabuluism. This applies as much to a tribal society as to the stories your friends tell at the bar.
On 40k with the standard deduction and claiming yourself, you pay just under 4k in federal taxes.
How to use tiny programmable robots to introduce kids to coding
It may be a reasonable theory. But there are lots of ancillary industries that help support the niche - boat manufacturers, plastics/cloth companies, clothing and misc gear companies that are native to windsurfing (such as brands like Revive, Vans, Sector 9, etc are to skateboarding), and dozens of other related brands. You may also be hurting your income if you are only doing direct buys/run-of-site buys, since you don't really know what the market value of placements on your site are, you only know what the few brands you consider "endemic" value your site for.

I could likely come up with a few other reasons given the time, but I think this makes the point decently.

EDIT: Also, remember the incentives of the many mainstream high-traffic sites who are pushing this narrative about advertising.
The earliest apartment buildings in California that have garages date from the 1920s! You might want to check if your city has a program for creating on-street chargers.
“Happy you’re unhappy”.

2 charging spaces that are first come first serve are probably impossible to use.
That, and the fact that he wasn't meeting with the YC teams. If you're the CTO, it doesn't matter that you missed the initial meeting. The founding team should all go and meet.
I am typically quite skeptical about these kinds of products, but the phrase "non-refundable deposit" made me read on. I hope they pull it off!
I'm wary of comparing with laptops and cell phones, because a proper EV drivetrain will suffer much less degradation. Consumer electronics batteries are poorly cooled and prioritize daily capacity over long-term life, so they degrade much more quickly. I'm sure you know this, but I see a lot of people thinking their car battery will only last 2-3 years because that's how their cell phone is.

For what it's worth, I appear to have an outlier, but my Tesla's battery has degraded well under 1% after 2.5 years and 40,000 miles.
"Kill you"? Sorry but this is fud unless you can cite death rates.

This site here lists the Volt as lowest death rate listed among small 4-dr cars.

http://www.iihs.org/iihs/topics/driver-death-rates
This might not answer your point fully but in the article:

> China had previously circulated a proposal that would allow electric-car makers into the country without local partners if they were to locate in the so-called free-trade zones. The government set up the country’s first such zone in Shanghai in 2013, and has since approved 10 more around the country.

> Until now, foreign auto makers have built cars in China through joint ventures with local manufacturers. That allows them to avoid the 25% tariff on autos, but also forces them to split profits, and potentially share technology, with the local partner—something that has tripped up Tesla’s previous efforts to expand there.

My reading of this is, Tesla is okay with the tariff sanctions but doesn't want to share tech or profits with local partners. While that doesn't completely remove the potential IP problem, it does mitigate to a certain degree.
Because the negative externalities don't affect the balance sheets of companies. However the companies with the biggest profits can lobby politicians more effectively. They can also pick their favorite jurisdictions to operate from.
Intel has a big assembly site there (Chengdu, China) but fabs are still in the US, Israel, Ireland.

I wonder what Trump has to say about this move by Elon.
It has been my observation over a few years of working but it is ultimately no more than that — a personal observation.

For facts I could list people I have known or read about — but that is just anecdata, and my direct observations are not subject to verification. How would one structure a good solid study on integrity, to get solid facts of this kind? The absence of such a methodology does not, unfortunately, mean we don’t have to think hard about people and integrity.
Ask HN: How do you shop for clothes online?
Google? Via favorite brand or retailer website(s)? Only offline? How do you find out about sales? Via email newsletters?
Supersonic capable turbofans that are able to get the "force multiplier" of using bypass airflow for thrust at supersonic speeds are honestly the key enabling technology here.
Feedback. Speed and clarity of feedback trumps effort in honing a skill. Note that parent didn't say "no work" but "no homework". Most forms of homework give unclear feedback to the student with few ways to check work before turning it in. I cannot count the number of times in middle and high school that I got a homework assignment with poor directions that was assigned the day before it was due, leaving no opportunity to correct course - just a lot of nervous "I guess this is what they want?" Hours and hours of time wasted on a concept that I might have actually understood how to apply but not how to present in the way they wanted.
Quantum Machine Goes in Search of the Higgs Boson
The most common elements, sure. It's the rare elements that are more interesting. Many of these are rare on both Earth and the Moon because they are iron soluble and sank to the core. On Earth they get replenished from either asteroid impact or volcanism, then plate tectonics and hydration cycles slowly move the material back into the mantle or away from the site of deposit. Those processes don't exist on the Moon, so there's been ~3.5bn years of bombardment leaving precious-metal rich deposits on the surface of the Moon, where they remain until someone comes by to pick them up. You'll find that most of the Moon is boring rocks only a geologist could love, and then a bunch of super highly concentrated ores at deposit sites. And these deposit sites are not hard to find either. Just look for craters...
There is almost always a military solution. It’s just that the outcome may not be “optimal”.

Clearly, some cases are way, way less than optimal.

D-day planning, for instance, was quite ugly. They planned for roughly 40% casualties just on securing the beachhead. That’s a military solution, but it sure sucked. Thankfully it worked out much better than the plan.
That's very interesting, thanks for sharing. I really like the Bolt (or did) but won't allow myself to buy another GM vehicle for other reasons. My dad is an old 60s car guy, GM diehard and a collector. Has a lot of six figure originals from their heyday. His favorite is definitely his 1970 Buick GSX SS Stage 1 that they only made 1,000 of or so. He's the original owner and it's all original. My brother has a Buick Grand National which is a pretty cool car too.

I never cared much about car brands but usually leaned towards GM as a result, Pontiac always caught my eye. GM's lineup seemed as good as anything. Once I had to take my car in for a recall I found how wrong I was. Both the dealer screwed me (expected) and GM corporate did as well (unexpected).

Long story short, they did an ignition console swap and after they were done they gave me 2 sets of keys and told me that one was for the door and one was for the new ignition. GM's CEO even stated on her blog that this was not to be the case. I wasn't the only person complaining about being told to have two sets of keys either. I filed a corporate complaint and they told me to pound sand. I did file a BBB report on the dealer and they never replied so I guess it just went on their record uncontested.

As well, GM later denied payment for a faulty gas tank issue that they sent me a mailer about for reimbursement but never paid me. The fix had already been done at the tune of $550. I followed their instructions exactly, quite time consuming tracking down receipts I no longer had and so forth. They still said I had something wrong with my application. Don't know what it was, at that point I was done hassling with them and had made my final decision on GM.

The verdict is no more GM for me or my family for the rest of our lives. There's plenty of alternatives. My wife now has a Subaru Crosstrek and I'm buying a Tesla Model 3. The new Honda Civic hatchback is pretty neat. Ultimately I believe I'm going electric from here on out, but never GM.
In my case, the 2 spaces are not impossible to use, I've used them. (The complex has 280 bedrooms.)

Also, when they become more contended, the capacity can be tripled. (They're waiting until it becomes needed.)

Sounds like you didn't even try.

Edit: I don't think I've ever gotten 4 downvotes on HN for anything before, but it's fair to say that this is hardly the most arguable thing I've said!
Rumbles of the Quantum Computing Revolution in Security
NYT Reports EPA Censorship: EPA Cancels Talk by Agency Scientists
Seems like Tesla has been eying this move for over a year. Bloomberg [0] broke this story last year (June 2016) saying Tesla planned to invest $9 billion in Shanghai, according to a 'person with knowledge of the matter'. However, one key point from last year's article is:

Manufacturing in China would allow Palo Alto, Calif.-based Tesla to avoid a 25% import levy, making its electric vehicles more competitive against luxury-brand rivals, such as BMW and Audi, as well as local offerings by BYD and BAIC.

Last year, it sounded like Tesla's motivation to manufacture in China was to avoid this tariff. Now today's WSJ story says Tesla is still likely to pay the 25% tariff. Sounds like Tesla got shafted by Chinese protectionism.

[0] Non-paywalled Bloomberg article http://www.industryweek.com/competitiveness/shanghai-said-be...
> Ask HN: Why are we as a society unable to account for negative externalities?

Because (1) externalities, especially diffuse ones, are often difficult to objectively assess in magnitude (this is true of some internalities, too, which is a source of market failure), and (2) the people who benefit most from not accounting for externalities are also the people with disproportionate power in society.
Working on a startup in fashion and curious
This is a huge part of the problem IMO. Plenty of people have busy schedules, but they also have autonomy, and they get to make decisions about what is important to them and what isn't. Kids have none of that.
Photons pair up like superconducting electrons
I don't mind them asking, but I'd much rather it be via one of those very unobtrusive icons in the url bar as opposed to a pop up with a choice required.
it's just not possible to own one of these on much of the east coast. i would have probably bought this summer but seeing how abysmal the recharging story is made me shy away.
If you think getting to the Moon is hard, where many resources are surface extractable, look into what it takes to mine certain ores on Earth kilometers below ground in remote regions.
Ask HN: How much code do you write before running and testing it?
How much code do you write before you compile or run your program to see if it works?

1 line? 10 lines? 100? a thousand? I'm just curious how other's work and why.
I strongly considered one as a second car. You won't be driving to Disney World with it (unless you live in Orlando...) but as a supplemental car for stuff around town when my wife and I want to be in different places at the same time, it would be just fine.

We ultimately decided that we weren't in a big hurry and we'd rather go all-out and get a Tesla Model 3, but for someone wanting to spend less, it could be a great choice.
Migration from Golang to Elixir/Erlang
How do one approach in bringing about that change in software development org ?
Why doesn't Golang sustain for a small-mid sized org in terms of building maintainable software ?
Does Golang require more maintenance (more code -- > more bugs ---> more maintenance --> more developers needed ? - is that a valid hypothesis ?
Using optical chaos to control the momentum of light
I admit I don't know too much about cryptocurrencies but how are those unicorns? Aren't those all currencies and not companies?
On a more positive note, this is largely how the 3rd-party repair industry for Apple's and other's electronic products (laptops, TVs, etc.) is fed --- leaked schematics and other documentation is very useful not just for cloning but for repair.
I wonder how many UBI proponents here would be willing to adopt your immigration rules, which go a long way toward making your system work as well as it does.
Usually they dont even have to convince anyone, the only way to build a factory in China used to be a joint venture owned by Chinese partner.

Here Tesla is willing to pay '25 percent tariffs' to avoid that, but I highly doubt it will do them any good when it comes to Cherry Model Q/Geely Electric showing up in 12-18 months build using parts interchangeable with Model 3.
So knowledge should be trapped behind a paywall?
Doesn't account for why this would be happening more recently.

In the past in Europe, was fast food actually slow, expensive, and not that tasty?
Why would anyone want to eat as much honey as they currently eat sugar? Why would anyone think that would be any less egregious?
Simple+YouTube+MP3+Button
I thought Tesla (unlike SpaceX, due to ITAR/etc.) was pretty open with their technology. I assume Elon would be happy if all of the non-EVs in China copied Tesla. OTOH, I think the Chinese market actually already has better EVs for 90% of the Chinese market, and the market for Tesla is the high-end prestige market which wouldn't be so affected by copying (they don't copy BMWs today)

https://www.tesla.com/blog/all-our-patent-are-belong-you
As long as you can replace your daily needs overnight, the number of hours of charging per day doesn't matter. If you drive less than about 50 miles per day, you can do that on a standard 120V outlet. If you need more than that, you can double your charging rate with the same gauge of wiring by switching to a 240V/15A circuit, and maxing out the Bolt's 32A charger only requires a 40A circuit which isn't too bad to install for most people.
Its either 25% import tax, or 50% profit. Chinese are really smart about protecting their own economy.
I thought I read, perhaps here, that Tesla over-provisions its batteries and uses software to optimize the battery "working set" to minimize perceptible range degradation.
Set Base Document for Document Comparison and Add/Remove Comment Reply in Word Doc
Even into the 90s, numerical simulation of naiver-stokes was pretty minimal (I worked with the NASA Numerical Aerodynamic Simulation folks at Ames at the time) and yet up to then the SR-71, X-1B, Valkyrie etc were all designed, built and flown, not to mention some spacecraft too that you might have heard of :-).

There was some computational modeling, but mostly it was old fashioned engineering: slide rules, models, and as someone else remarked, some over-engineering. The same way people built bridges 150 years ago when that was a black art.

There's a wonderful/sad picture at the Hiller museum on 101 in San Carlos. It shows the day the Boeing SST program† was shut down. In front of the mockup (which is also at the museum) are wooden workbenches with vices attached.

It made me realize that not only were they designing everything with slide rules, but people then built all the parts by hand from drawings a draftsman (not draftsperson in those days unfortunately) also produced by hand from hand-sketches and notes by and engineer. Honestly this blew my mind when I realized that the ME-262, SR-71 and LEM were produced in the same way.

And I should have known: at MIT I took Unified the last year (1983) that the practical work was done entirely on old WW II surplus machine tools. In the next room, not yet unpacked, were early CAD systems.

† I still wonder if Boeing was every really serious about passenger SST.
A Prius performs light regenerative braking whenever you're not depressing the accelerator; it primarily uses regenerative braking when using the brake pedal, but will switch to the friction brakes if you brake harder than the power train can move energy back into the battery or the battery state of charge is at the upper limit.
The Silicon Valley Suicides -
Why are so many kids with bright prospects killing themselves in Palo Alto? (2015)

https://www.theatlantic.com/magazine/archive/2015/12/the-sil...

Contemporary schooling in the US can vary from school-to-prison in poorer neighborhoods, to academic pressure cookers that appeal to demanding parents by promising that their boy or girl will "be successful".
I wouldn't compare the Leaf, which has no thermal management system with a Bolt, which does.

The Leafs are basically designed to degrade. Tesla's and Bolts are designed to last.
This is the most interesting question I've seen in a while.

While I'm confident that material choices could provide some protection based on decades of spaceflight engineering and research into lightweight radiation protection methods.

However it's the kind of hidden issue I can honestly imagine no one thinking about until it's far too late, which could make it a significant Achilles heel in terms of practical operation of these planes by airlines.
There is so far no evidence of them influencing the election in any way.
Another interesting project is RDL: https://github.com/plum-umd/rdl

Both Diamondback and RDL come out of UMD. I'm curious what drives this research there. From what I can tell, Ruby is barely touched otherwise by academia.
Artificial sweeteners are no solution. https://youtu.be/F7x_2f7uQyc
I looked, and I see the error bar is 0-39, which is so large that the average death rate is within that error bar.