skysight-inc/HackerNews huggingface dataset:
> The topic is HN being critical of authors suggesting that regenerative braking is a net positive.

But regenerative braking cannot produce net positive energy compared to not braking at all -- that violates basic physical principles.

Regenerative braking is better than no regenerative braking, but regenerative braking is not better than not braking at all. That has been the point all along.

> = Net city driving with regen braking: +10% efficiency

No, not compared to driving at a steady pace. If the scenario you describe were so, it would represent a gain in energy greater than 100%, and that is not possible.

Stop-and-go driving is always less efficient than driving at a steady pace at the same average speed. Regenerative braking can only minimize the loss caused by stop-and-go driving, it can't reverse it -- it can't produce a net gain as you are implying.
This has been mentioned before on HN and I'll take that as a general vote of confidence. The official site has videos that don't want to play (on my laptop) and seem to expect one to buy the book in order to learn it.

Here is a TL;DR version: http://en.wikipedia.org/wiki/Pomodoro_Technique
Show HN: mymoneylive.com (personal finance app in ext/backbone/jquery)
We are 2 Italians, in Treasure Island, and we are launching CoffeeStrap.
Show HN: Command line task management tool (Weekend Project)
Thnx. I use "dip" as special notation in my layouts and forgot they were actually dp.

I will concede one big difference: a lot of designers work in Photoshop so they're dependent on pixel resolution. I do everything in Illustrator, so I rarely think pixels.

If I think about resolution in old terms of strictly pixels then yeah, I'd be lost. But since I do everything in vector format, I still do my basic phone layouts at 320x480 and then scale from there.
I guess if your kids absolutely must work on an assembly line.

On the other hand, as automation gets cheaper the barrier to entry for lots of different enterprises continues to go down. See Computers->Desktop Publishing->Web Enterprises or 3D Printers eliminating the need for expensive manufacturing.

Automation has increased by leaps and bounds over the last hundred years and comparative wages in industrialized countries have gone up.

If you want to look for dangers to your kids (assuming you're American), make sure you take a gander at the national debt. In particular, look at the nation's unfunded liabilities. It's probably too late to do much about them besides try to minimize their impact. The problem is already going to crush your kids.
> Heh I'm stoked someone called us an API for social games. Usually people call us wildly less accurate things. YAY!

You're website says:

"playapi IS A PLATFORM FOR CREATING SOCIAL GAMES"

And your name is "playapi." Sounds pretty accurate given the website. :)

Now as a total outsider to your business or it's history, having never heard of it, if this comment is like your pitch, personally, I think it is a little convoluted. HTH!
So much pessimism here. Although I can't afford a Tesla S, I thank god for those who can. They are the early adopters that make the market for future models that surely will be cheaper, either from Tesla or another company. Tesla is on to an awesome idea and so far it's an exciting execution. If only they could get the price for a supercharge-capable car down to $30k, then I'd be happy to get one.
Zo kweek je zelf sla - Plazilla.com
I'm from Europe. I'm not sure what's behind the paywall because I think I see all the content.
I never seem to go back to the site. What makes it great content to you ?
Her point was far greater than that, and it was where the "defects" come from.

The answer is the system; not the individual. And that is one of the greatest leaps in understanding possible for a person.
Currently the bitcoin network total hash rate is 30.078 Thash/second. Within a few months that figure will certainly be much higher.
Yeah, it would make a lot more sense on the PC... no need to go out and buy the next "book," just download (what I assume will amount to) a huge patch.

But since this is a massive undertaking, it has to be marketed towards a massive audience. And keep in mind, it won't span years on just the 360 and PS3; it is almost guaranteed to be cross-generational.
Have you looked at Sentiment140? http://www.sentiment140.com/
It's a nice tool for sentiment analysis on Twitter with a free REST API.
very good points.

right now i have the same problems...still studing, more then one job, setting up/finishing my new apartment.

Respect to you, that u shotdown ur internet on ur laptop at 8.30pm - you never enter ur router and deactivate this feature?

i will try to adopt some of your points to get rid of some stress in my life.

thank you.
No Emails on Saturdays
Very incorrect. A short back of the napkin calculation:

286mi/85kwh / .12 (dollar per kilowatt hour) = 28 miles per dollar or .03 per mile.

Gasoline on the other hand is:

30 mpg / 3.50 (dollar per gallon) = 8.5 miles per dollar or .11 per mile

Electricity comes out far better. Cars are much less efficient than heaters at capturing the stored energy from it's fuel. With a heater you have the benefit of insulation and none of the losses associated with moving a hunk of metal through air.
People are also assuming that Halo is a masterpiece. I don't consider it a masterpiece. It's a good shooter but that's about it.

It got the 3d shooting game mechanics right but Bungie is definitely standing on the shoulders of giant developers who created the masterpieces.
Show HN: Dbpatterns Is Now Real Time
I am not sure it will always under-perform with one CPU. It depends if async threads are used and if kernel poll is enabled. Erlang is designed for better low latency response at the expense of _some_ sequential slow down. I wonder if Erlang would scale slower but it will throw less errors as number of requests increases.

EDIT:

Also it would seem benchmarking Erlang and forcing it to run on a single core just like node.js is deliberately handicapping it. One of the strengths of Erlang is exactly the ability to take advantage of multiple cores.
Heh well yes. Logical win :-)
I turn off my computer at night to save electricity.
You can (and should) still have kids. Once you find this similar partner, you just need to agree that that is how you want to raise your kids. They will be no less happy. Trust me I'm doing it.
Microsoft needs to fork the Android free source code, and extend it to work with their proprietary and legacy software.

I cannot see Microsoft ever getting above 3% market share in the mobile market. Time for MS to join android, Mr. Ballmer.
No, it doesn't give law enforcement any new powers. This is an example of the misinformation about this bill.
I tried Pomodoro a while ago and found 25 mins too short to do anything especially coding. Then I adopted a variant of it: 50 mins timer for work and 10 minutes break time. The tool I use is the timer feature of iPhone Clock app. Have boosted my productivity a lot.
I should also add: use Illustrator for layouts, not Photoshop, to take advantage of scalable vector art. Sooooo much easier.
Agreed. This seems a much better business model. You avoid the cost/liability of owning and replacing the batteries too. On the downside, you're back to paying out money to an energy supplier like we do today for gas.
You shouldn't be using passwords anyway, you should be using key-based authentication.
This month's PLT Games is about gamification of programming languages, you should submit it: http://www.pltgames.com/competition/2013/2
My question exactly! So I built something about it. :)

http://sideprojectors.com
That might be (though if you browse under 'Hardware' or 'LoperOS', you'll find relatively recent posts; his updates are generally scarce throughout in any case) - I'd say this is one of those really long-term (indeed, vaporware as of now) projects that might not make it, but hey. In any regard, I'm quite sure the author himself sees this as a really long-term affair and treats it as a free-time-after-work kind of thing. [0] I mean for what he's set out to accomplish, it's a huge undertaking. Perhaps an over-ambitious overkill, but I for one try to follow his (frustratingly infrequent) updates because (1) it's a really interesting idea and (2) I like his perspective and I think some of the people here might share a subset of his views (it's not difficult to spot them, as he rants relatively often;).

[0] http://www.loper-os.org/?p=562
My personal theory is video game journalism is young enough to have largely missed the old fashioned long-form investigative journalism phase, so there isn't even a history of strong journalistic integrity.
Are you tired of trying to figure out which startups are worth your time? Instagraph? Tweetr? Who can keep track?!? Just sign on to Peelr and we'll sort it all out for you!
Get out of the hellacious Silicon Valley and move to Boston. You'll like it better.
Have you considered freelancing?
Hitchhiking From Norway to Lebanon with a Backpack and a DSLR
And you're reading Hacker News why? I knew I would get hellbanned eventually for not being in the clique, but I didn't expect it from a +6 point comment. This community is a definition of degenerate.
Just one minor comment, he used to spend $250 a month on gas, i'm amazed, thats absolutely nothing. Here in the UK it costs me £100GBP to fill my tank with diesel, which lasts about 10 days, granted i drive a fair bit, but £300 a month is $465 USD. So i hear ye, bring the electric cars and their super charging stations over here, i'll deal with the minor inconvenience of waiting an hour for a charge, which i personally think is a temporary problem. In the mean time, i'm planning to see how viable making my own biodiesel is.
Solid post and there's a lot to agree with. However, one statement was difficult to digest.

If factors like "health", "happiness", or "family" rank below professional goals, your long-term priorities are not stable.

The second factor, happiness, is probably the most difficult of the three to qualify. Professional goals and happiness may be intimately related for many people, and activities that bring more immediate happiness may be ones that detract from long-term satisfaction. Maybe a more accurate way to put this would be to avoid pursuing professional goals if it involves sacrificing life goals.
There's a problem worth fixing... a service that tracks apps and their "probability of existence in x years." Or something.
I have, it looked like a good tool for Twitter, but I'm looking for a tool that covers more platforms.

I should also state: our main platform is Facebook, so the tool needs to include support for fb.
Perhaps you'd be kind enough to share your idea of "average half-decent payment service provider" with the rest of us?

Merchant accounts and legal formalities aren't just hurdles if you're spending weeks getting contracts reviewed by lawyers, filling out application forms, chasing people up, and then integrating poorly documented back-ends if you get approved at all.

I know plenty of people who've been in that position with a start-up that has no trading history yet, but I've never met anyone IRL or on-line who has anything like your perspective. So do you know something we all don't, or do we all know something you don't?
c.f. http://en.wikipedia.org/wiki/Parable_of_the_broken_window

We can redeploy those resources to other ventures, even if there is some short-to-medium term pain.

That said, yes, the OP was overoptimistic in the short term, but I don't see how he's wrong in the long term as the price comes down for the Model S and renewable energy is deployed more extensively.
> The difficulty is that you need anti-biotics for modern mass production of livestock.

This is a classic misuse of the word "need". Antibiotics increase growth rates, but is optional. Without antibiotics, the growth rate is reduced, but the drawbacks of antibiotics, some known, some unknown, are not present.
What I never get is why doesn't anyone ever propose battery exchanges instead of charging stations. It would make a lot more sense to pull in and exchange your dead battery for a charged one (just like buying propane).
You are wrong about battery replacements - they are $8,000 to $12,000 dollars depending on capacity, and batteries are covered by an 8 year warranty.
i can pay $20k for a car (actually driving one that i paid $2k, but i will leave that edge case out). then i can use $10k of gas a year. maybe will have $10k year of repairs. and it is certain and proven for ages.

now, tesla. I have to pay $60~80k... not depending on leather or comfort, but how far I have to drive! then there's the fact that there's still not know pricing model for charging stations. it's all fine now that the costs of the cars are paying for it. but what will happen next year if Kia starts to make electrics. do you really think Elon will continue to let everyone uses their power stations? will he make it tesla only (and ultimately failing his model as nobody will be able to charge easily as every company will do the same) or will he start to charge for it?

Then there's the fact that nobody knows if those cars will last the same as my $20k 2nd hand cars. How much will you spend on battery over 10years? may be zero. may be another $60k.

so, option A) $20k upfront, $10~20k an year for gas/repairs.
option B) 60~80k upfront, 0 to $80k an year.

yeah, having $0/year would pay off option B in 4years, but it's not certain. The fact that i never spent one dollar in Vegas will make me stick to option A for now.
actually he said 6:30pm, heh
It occurred to me that if you want to multiply the number of necessary guesses by running sshd on an alternate port, you'd need to run multiple sshds. (Of course all but one of these sshds should be decoys.) Doubling the number of sshds is then like adding one bit to the password.
> 3. They can dump 150 miles of drive time into your car in an hour

can't wait to be able to charge my phone at one.
CSS Rooted: Flexible Type Sizes With REM
Thanks for the mention! :-)
Designing our responsive wedding site
The Tesla battery contains over 6800 3100mA 3.7V Panasonic 18650 Li-ion battery cells. It costs $40,000 to replace. This battery has a life expectancy of 500 charge cycles. That means the battery cost per 240 mile charge is $80, and the company would have to charge that to recover just their battery costs. Add another $20 to handle tax, labor and the cost of maintaining the equipment and the recharging, so $100 per swap, assuming this is run as a non-profit endeavor. Do you feel there is a large market for people willing to pay $100 for every 240 miles they travel? Such a network of replacement stations assumes that the market will pay these costs.
A faster way to use boom
Game developes are what, $80-150K/year on average (of all levels). Add benefits and tax overhead, makes it $110-180K/year. Times 350:

$38,500,000 - $63,000,000 per year.

(I don't know if they include artists, managers, executives in that 350 number, so it could be more, much more).

It's really not a crazy budget, movies break that all the time. There are multi-billion dollar game studios out there.
Why do you have to refresh the page to change the header image? Wired can hit me up any time, I can fix that for them.
Yes, Braintree's initial paperwork is a PITA, at least as bad as any other payment gateway/merchant account set-up we've seen. And actually their fees can work out very high as well in the early days, because they have a minimum level each month whether you take any payments or not.

We're still looking into them because their terms don't seem to have any of the abusive conditions that we would never sign and their reputation for good customer service is attractive, but they are very far from ideal.
If you're interested in something similar but a little more theoretical, take a look at "Simply Easy"[1], a little paper on implementing a couple of variations on the lambda calculus. The main idea is to demonstrate how to evaluate a dependently typed language.

It starts by looking at how to evaluate the simply typed lambda calculus and then going from that to a dependently typed lambda calculus. Surprisingly, the transformation is not all that complicated!

The actual code is in Haskell.

[1]: http://strictlypositive.org/Easy.pdf
yeah, americans have no value for gas.

before moving here i'd spend USD$300/month for my weekend car. but mostly because i didn't have to drive to work or bars.

now here it's still USD$300/month, but i can't buy bread without burning 1~2gallons of gas. i estimate i'm burning at least 3x more. minimum.
You could say the same things about the internet or about software... that ingraining these technologies into every part of our society could have major long-term economic ramifications that deserve consideration. Even today, the number of low to middle-wage jobs that could still be replaced with software-driven solutions will amount to a huge number of jobs that will no longer be necessary. Agree with you that we shouldn't label these things good or bad - they represent progress. But we shouldn't ignore the likely ramifications of massive shifts like this until society feels the pain.
Just because i was curious, i did a quick google:

[1] Cheapest gas in California is $3.71 a gallon.
[2] Cheapest petrol in UK is £1.32 a litre (rounded)

100 litre fill up in UK is £132 or $204.88
100 litre fill up in Cali is £97.89 or $124.43

[1] http://www.californiagasprices.com/
[2] http://www.petrolprices.com/
Only if it's running Windows.
Why Microsoft’s new Office 2013 license may send users to Google Docs
oh god I laughed - funniest post on HN
Well, the Tesla S is essentially their first consumer electric car. It's like buying the first laptop Apple produced (Powerbook 100) which costs around $6000 in today's dollars.
If it's anything like Yahoo! when I was there, they're resisting that because refreshing the page for every image displays another set of ads.

(It's 2005-era thinking, but the metrics for some ad networks are [or at least were] skewed to invite abuse of that metric.)
Raspberry Pi as a plug-in hash harvester
Just base the supercharger stations around fast-food restaurants.
What was that game when you had to drive for several hours on a straight road to get to the destination, only to get a bonus level of traveling back home (and then needing to swerve around a single stray dog in the last hour just to stay on the road)?
I expect it will compare favourably, except it's first person shoot-em-up style.

I wonder how it will compare to Entropia Universe (fka Project Entropia).

They've also had a persistent, single instance, MMORPG universe for a long time. They ended up introducing missions because people didn't come up with their own things to do. They also have an open ended skill system with no levels. Higher skilled players tend to migrate to the more dangerous areas which cannot be safely travelled by mid-level or beginner players.

Biggest difference I can tell is console vs pc.

(Played EvE for ~9 months, WoW for ~14months, Entropia probably ~2 years over a 9yr period...).
> But it is. It's as safe as anything you can name.

Having $625,000 and hoping for an 8% return to sustain your retirement is not nearly as safe as, say, having $2 million dollars to sustain your retirement.

If you've only got so much money, sure, trying to live off the interest is not a terrible strategy. If we're talking retirement planning (which I thought we were), then planning to live off 8% interest of a minimal amount of savings is NOT a good strategy to shoot for. It is far better to be conservative, plan to have a larger amount of savings and invest in safer options (such as bonds) and plan to have enough money to sustain you for 30 years.

Now of course if it comes time to retire and you only have $500k to make last, you're obviously going to want to take some greater risks with your investments and live as minimally as possible and hope for the best.

This is why I made my initial point, that I can see elderly suicides rising in the future. What's going to happen when the market doesn't go your way and at 80 years old you're out of money and your kids have their own problems? At that point you don't have a lot to look forward to other than living on welfare and watching your health decline...
I keep thinking exactly the same.

Possibly it is because you can do a lot more damage to a battery by mistreating it than you can to a bottle of propane?
I think the real journalism involving videogames wouldn't be regarded as "videogame journalism". Cultural issues like misogyny/portrayal of women, working conditions for developers and QA, and similar important issues are likely to be handled by "outsiders". Videogame hardware is assembled in Foxconn, too, after all.

But it helps that the blogging/website proliferation makes reviewers and reporters (I refuse to use the term "journalists") more independent of the publishers and videogame developers.

It's getting harder for publishers to control the press, which is probably what we are going to see with this event.
My thoughts exactly. The US probably has a just as big or more sophisticated organization of hackers and cyber warriors. It's fantastic and also overlooked when talking about Chinese cyber espionage. Much talk seems so one sided, but it's hard to objectively talk about without knowing what the American cyber warriors have been up to. I'll take it as a sign that they're doing a good job and not getting caught. Furthermore, I take comfort in the fact that there are slim chances that the US and China would actually go to physical war with each other. I want to end up working with China in the future, not necessarily against them.
See also: Huxley. A game i really wanted to play but never got released seemingly.
The NYT paywall actually excludes traffic coming from social sources like Facebook and Twitter. They don't do so for Hacker News, though (and I'm not sure about Reddit). So the general principle supports your use-case, it just isn't fine-tuned for the specific sites you use.
The article says "handed out concept art instead of screenshots" -- so, presumably, not even screenshots. Just concept art.
This puzzle made me remember a pretty impressive game (unfortunately too ignored) called Core Wars, where programs fight each other inside the computer memory -> http://youtu.be/Du3DSs7hWRA and http://en.wikipedia.org/wiki/Core_War
> The horizon is an outgoing lightlike surface; with respect to Frame X (or to any inertial frame that straddles the horizon), it's moving radially outward at the speed of light. It's not a plane stationary in space.

"Lightlike surface" and plane are not incompatible ideas. Surface = plane in this case. The diagram or its caption doesn't say the horizon is stationary, it says the frame is falling through the horizon. Presumably the horizon is indeed moving in that frame at the speed of light (an outgoing lightlike surface).

> What direction is next Tuesday from you now?

The singularity is not a date; it's an object, like my coffee mug is. It's not invalid to show a direction to an object just because you'll reach the object next Tuesday.

> That's because you evidently don't understand what the curved spacetime around a black hole is like.

I've take a couple years of classes on this stuff. You're using the terminology inappropriately. The terms spacelike and timelike are not limited to black holes. By saying the diagram incorrectly shows the direction to the singularity you're implying that neither can I point to my coffee mug and say it's in that direction. But I can point to my coffee mug as validly as someone in frame X could point to the singularity.

I can even point to a real purported singularity by walking outside and pointing to the direction of the center of the Milky Way. It's no more complex than that. Can I validly point to the center of the Milky Way? If yes, then there's no problem with the diagram in that regard.

> It's a perfectly self-consistent model

An assumption that should be set aside when considering an objection to it.
The Hole in the Wall from Rory O'Connor
Anodyne, A 16-Bit Style Action RPG, Released For Linux