skysight-inc/HackerNews huggingface dataset:
One thing that might go overlooked: Load shifting could, in theory, lower electric bills such that there's ROI without solar panels.

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Edit for why: On-demand power is expensive. "Spinning up" additional power during the day is more expensive than having certain types of power generation running all the time. In theory, pumping power into a battery at night during non-peak hours will cost less than consuming directly off the grid during the day.

I'm forgetting all the details of energy economics, but IIRC there would also be far less emissions by having consistent load on the grid all day long. Something about the ones we "spin up" also being the worst for the environment.
Open Source Charting Library Using Facebook React
I know people who spend $480 per month.
$3500 doesn't include the inverter or transfer switch. Transfer switch is maybe $200, and it's not clear what the inverter might cost. It's a nontrivial part, since it would be responsible for daily cycle estimation and cost optimization.

For $3300 you can get a 17 kW generator with inverter and transfer switch [0], which will run for days on a house-sized propane tank. At my house in the woods, we do sometimes get multi-day power outages after storms. Though, to be fair, you need a concrete pad and 30 square feet to install the generator.

It doesn't seem like a competitive backup system, but load shifting is still appealing.

[0] http://www.costco.com/Honeywell-17-kW-Automatic-Standby-Gene...
For what it's worth, Feed The Beast[1] has similar content to technic pack, but they actually work with mod developers when they release a mod pack.

[1] http://www.feed-the-beast.com
Open Source NoSQL to SQL Data Transformation Engine (MongoDB to Hive)
Maybe your "backup career" should be the side project of learning how to invest the money you make now to become independently wealthy, or close to it, as soon as practical.
The POSIX subsystem was never there for technical reasons. It was there for political reasons - back in the day, a lot of government and army contracts mandated a POSIX system, so Microsoft made sure they comply with the letter of the law. (The intended spirit of the law was to require a standard OS to avoid vendor lock in....)

And they've been trying to remove it since that political requirement was off the table. Except it turns out that it was actually in used by some customers, so they keep bringing subsets back.
Well, not jets, but propeller craft might be within reach:

http://www.electronicsweekly.com/news/design/power/siemens-e...
> One family comes to mind, where I have to question both their ability and motivation behind homeschooling, but that's out 100+ homeschool families we know.

So how do you meet homeschooling families? I'd expect that they are going to be self-segregating groups - where parents looking for materials on God Hates Fags are not in the same discussion as someone looking for a more advanced education for their kid - so it makes sense that if you are in the latter group, you don't know many in the former.
How well do you think these would work in RVs when paired with the number of solar panels that fit on top of an RV? Would this work well at burning man vs running a generator?
I doubt they would install one in an RV... but I can dream.
Implementation of such technologies is exactly what I worked on in grad school, and now I'm happy that a company like Tesla is actually gonna bring it to the masses. Batteries are essentially the "killer app" for the power-grid, and will accelerate the adoption of renewables with stochastic power outputs such as solar and wind. Thank you Tesla!
Google 'should be allowed in examinations'
I'm really talking about the kind of developers that hang out here—people who regularly set up their own staging environments, use those "tunnel into my dev box" services, etc. Most of us here certainly know SSH, and probably have used GnuPG at least once. But it's still relatively unlikely, statistically, that you or I have ever touched the openssl(1) command.
Korean actually has a generous share of onomatopoeic words: for laugh, there's at least haha, hehe, hoho, heoheo, huhu, and kkalkkal, and that's just counting more or less standardized words that would probably appear in most dictionaries and have well-understood connotations.

Interestingly, Korean internet somehow settled on ㅋㅋ (literally, "k k"): the closest word I can think of is 크크 (keukeu), which is... well, the kind of laugh a villain might make after explaining to a captured hero how he will be thrown into an elaborate death trap.

(And don't believe some internet sources that say Koreans laugh "kekeke". It's simply because the sound I wrote as "eu" ("Close central unrounded vowel", or /ɨ/) has no English counterpart, so people wasn't sure how to write that in English. Besides, nobody's gonna pronounce "keukeukeu" correctly anyway, so why bother.)
> if even a handful of the people who now use Git had learned both Git and Mercurial and made an informed choice between them. That simply does not appear to be the case. Git got ahead because Linus invented it, and won because of GitHub.

I think you also underestimate the developer community (or may I overestimate them.) Regardless, my anecdotal evidence is that I did try HG and Git, and while I preferred HG when I first started evaluating them, as soon as I found out how to use Git branches, it was all over for HG. At work we currently inherited a project in HG and everyone that has to work on it complains about it. Some know Git, some are .Net or even old school CVS/SVN people (our VCS migration took a bit longer than it should have), but it doesn't matter. HG = hard to use for them, whereas Git make sense after getting over the initial hurdles. I see the same kind of path I took, where at first they are like, oh, Hg isn't bad, and then after using both, choosing Git as their preference.
NOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO
Indeed, it seems much more authentic than any crisp marketing mumbo jumbo.
How big is their battery business compared to their car business?
I've had a few bad experiences with KS but as someone whose been using it since very early on, I'm generally pleased with it. KS launched in April 2009 and my first backing was in December 2009. Since then, I've backed 75 projects, 20 of which have yet to deliver, but only 2 which I think will probably fail completely. Most of my pledges are for board games, books, and small gadgets, all of which seem like pretty safe categories.

Around 2009, I had been thinking that the future of music and art might be a return to the patronage system, only with mass audiences funding artists instead of rich individuals. KS, Patreon, and other sites like them seem to have proven that theory out. And I'm happy to see them do so. I still strongly believe that distributed patronage is the best way for artists, musicians, game designers, and even film makers to be able to produce what they and their fans want.
I don't know about your consumption but ours is definitely 'bursty'. If we could have a battery with some surplus to offset some of our breakfast/lunch/dinner + laundry routine it would pretty much eliminate most of our energy bill.

However, I might be completely wrong about how this works.
$40K for 9kW solar sounds really expensive, I advice you to shop a bit or consider Solar lease. I have a 10 kW plant from SolarCity installed in late 2013. It is a prepaid 20 year lease, meaning I own the electricity and they own the panels, and the total cost (including installation, pv, inverters) to me is about 10K.

You seem to be getting a 1 cent more for the electricity, so your only motivation for this must be to have a back-up. But the 7kW powerwall is daily cycle, it may be a OK backup but not beyond a day or two.
If you're only looking at it from a financial perspective, it may not be "worth it" (I haven't done the math).

But if you want to pay a little to be able to have reliable power from unreliable sources, then it could be "worth it". It may save you zero dollars over ten years, but during that time you're provided the service from this system.
https://arpnetworks.com/

I've been with them about five years now. No real issues during this time.
I wonder how many years this battery will last before requiring replacing?

Storing power over the course of the day is an intriguing idea, because the house is generally empty then. Instead of selling back to the power companies, I would rather have it power this battery so that my night time use is "free".
> Batteries are not a source of energy. They store energy. (You'd be surprised at how many people don't grasp that.) Talking about how many batteries we need to power the world without talking about where that energy is coming from is silly.

I'm not sure why you got such a weird impression. In his talk he clearly states that the power would be coming from solar energy. He even explained how much space you'd need for solar arrays and batteries if you want to provide the entire United States with power day and night (the biggest need for batteries).

He also mentioned there is utility for the battery to be used with your powergrid but the big win is using it with solar energy.
Some people (like me) are simply unwilling to keep using carbon-based sources of energy. At some point it just feels awful to be contributing to such a terrible problem. I'm counting the days till I can sell my worn out petrol car and get an electric car. If I had a home and dollars, I'd want one of these batteries.
While it's a long way off that's pretty neat! Thanks!
Join the Internet Vote: Call Now to Stop Censorship
true. much love to lichess. easily the most sophisticated chess platform out there (that i know of), elegant and wonderful community love.
Why isn't encryption in the network stack, at a lower level than HTTPS?
Mr. WordPress 4.2 “POWELL”
OpenBSD tends to re-engineer things rather than use reference implementations - for example, their ACPI (power management) interface is a ground up implementation, whereas most others are simply copies of Intel's code: http://www.bsdcan.org/2009/schedule/events/131.en.html
This is much more groundbreaking than it may appear. The innovation is entirely in the price.

At $3500, you can put in two and be entirely off grid. Solar panels are cheap enough you only need batteries to last one night, as you can size the array to operate your loads even on cloudy days.
that would be an interesting comparison.

could you (eventually) save time and money by using an electric dryer + solar power + battery as opposed to hanging out clothes?
I don't think anyone will unless there's massive reform/change. Otherwise - do people just keep blowing the same whistle?
I view this as an attempt by various power brokers to subvert the power of the World Wide Web by attacking it's decentralized nature. In the beginning (like now) it'll be relatively simple for everyone to get their hands on the SSL cert they need, but the risk is that in the future, after support for HTTP has been reduced it could become more difficult to acquire the certificates required to deliver the user experience that you wish to deliver (not just in terms of price, but in terms of censorship).

In addition to making the web more centralized, forcing everyone into HTTPS actually makes it much easier to effect broad scale traffic analysis. On top of that many info-sec experts suspect that the actual cipher in play here may eventually be proven to have significant weaknesses at some future date. AND HTTPS is more expensive to support in terms of bandwidth, CPU, and increased latency. It could result it more coal being burned each year to push all of those extra bytes around.
To put it in perspective: in Florida, in the summer, using a 4ton very old/inefficient AC in a 2000sqft house in 100 degree summer weather, electric oven, refrigerator, washer/dryer and all other household stuff. I would burn about 3kw / hr in the middle of the day. So in theory the 10kwh would power a extreme case like this for ~3hours, and 9 of them could do it for ~27hrs. So yes you could do everything you would normally do with household electricity with this.
I think the minimum temperature will actually be a larger problem for the U.S. There's a lot of states where it easily gets colder than -4 F throughout winter, but the max will be a problem too.
Is there going to be a download available of the livestream? I'd love to have watched it, but it kept cutting out after about 15 seconds for me even on the lowest quality.
but unlike Elon, you don't think fuel cells are complete crap?
Priime (YC W15) Is Hiring: iOS Developer Who Loves Photos
Where I live (WA state USA), there are some crazy tax incentives here for solar. Rough math:

1. 30% rebate on federal income tax, so that's $12K back in the first year.
2. $0.54 / kWh WA state energy production credit which is capped at $5K / year. The estimated power production of a 9kW array over 1 year should get me pretty close to $5K back. The production credit expires in June 2020, which means that best case I get $25000 back from the state.

Without factoring in energy cost savings, I nearly break even in 5 years. Energy cost savings are somewhere in the neighborhood of $1200 / year with solar.

If the only rationale was energy savings, it's not a good investment. However, the tax incentives make it very attractive indeed.

More details on WA state incentives here: http://www.solarpowerrocks.com/washington/
Does anyone have a link that doesn't require registration to read?
The AWS roll-out also seems like big news. Last I checked, data centers accounted for 2-3% of domestic energy spend, and they typically feature backup batteries and generators. Tesla may have entered the (enormous) data center market the moment it broke ground in Nevada.
"Powerwall comes in 10 kWh weekly cycle and 7 kWh daily cycle models."

Can somebody explain what "weekly cycle" vs. "daily cycle" means in this context?
> This is incredible. Getting Minecraft modding working in Visual Studio is how you are going to get the next generation of kids interested in paying for MS Windows and MS Visual Studio.

FTFY.
Haskell as a language is suitable for beginners, but most of the learning material assumes some familiarity with other languages.

I've been teaching a bit, and what worked was to start with Racket on How to Design Programs (http://www.ccs.neu.edu/home/matthias/HtDP2e/part_prologue.ht...) for a while and then switch over to Haskell material, like Learn You a Haskell.

Racket is a great language too in itself, and has terrific material for beginners.
Yep. I had electric water heater (60A @ 120v) and still use a small electric AC unit (12A). And I still can't find anything that matches incandescent or halogen lights (I'd pay a lot for real, bright, warm lights, not the ugly yellowish fluorescent, or the weird off-white LED stuff - some LEDs are getting close, but not good enough for residential). Electricity costs were over $480 some months.

This is Guatemala, where I don't trust the grid much. I ended up buying ~$1000 worth of portable battery backups (UPS) and plug them in wherever I need it, but they need replacing every couple of years.

It'd be much simpler to have a simple battery pack, although I'm not sure this would handle the load.
But even if the life time cost for the energy is the same, if you can afford the initial payment, why wouldn't you do it? Especially if there are other advantages to the newer technology?
Nice list! FYI the table isn't rendering very nicely on Android Chrome
Well for me, I'm paying just over 22c/kwh, last period we used 808kwh over 80 days, so almost bang on 10 per day.

So with a solar setup that could charge a 10kw pack each day I could almost go off grid. That would save me nearly $1000/year once you take into account daily connection charges.

So the batteries would be paid off in 3-4 years, add a few years for however many panels I need and that's a pretty decent saving for no more power bills.

Of course it depends how long they are likely to last after that 10 year warranty period - no point swapping utility bills for tesla bills for replacements every 10 years.
I saw you updated the readme, thanks for that! In its previous state, it was much less clear: https://github.com/lucono/xtypejs/commit/4f9b631e2bd8cddb7be...

Again, I think it's a great library, and it's great to see you actively improving it - I was just offering some constructive criticism!
Check back in 24 months.
You should keep in mind that XFS is primarily intended (it does get used in other places thou) for big systems/large raid arrays, with high IO loads etc.

A kernel build is really a bad workload to benchmark a FS anyway.
Neat, my right ankle has also done that for years, but on the top of the upstroke! It's done it for years, though lately my left ankle also does it. (I'm 30) once again the internet brings together the mutants that once believed themselves alone.
Should have been implemented in Java :/

> A completely clean-room implementation of Minecraft beta 1.7.3 (circa September 2011).

> To get started, sign the Contributor License Agreement to establish that you have not, in fact, ever read decompiled Minecraft code.

> 'Clean room design is the method of copying a design by reverse engineering and then recreating it'

Not sure why it makes sense to say in the repo you reverse engineered it but then make contributors sign an agreement saying they havent read decompiled mc source.

Reverse engineering is a very broad term, but generally involves analysis of decompiled source, no?
This is pretty uncharitable to Jobs. If you look at Apple's trajectory over the last 15 years, you can see the vision was consistently outlined from the very beginning—the Digital Hub strategy (https://www.youtube.com/watch?v=9046oXrm7f8).

You can draw a straight line through iPod -> iTunes Store -> iPhone -> App Store -> iPad -> Apple Watch. Even though the vision was a little blurry with regards to how powerful mobile devices would get and thus how the smart phone would overtake the PC for revenue, it still holds up in the way these products are executed and integrated. Frankly, the only company that is really competing effectively with this 15-year-old strategy is Google, because they have cloud services chops that Apple has struggled with, but despite being dominant in that area, it's still just good enough to put them on par because their UX, integrated industrial design, supply chain management, and marketing still pale in comparison to Apple.

Just because it wasn't immediately obvious to the world that the iPod would succeed doesn't mean that the vision wasn't there or that it was just dumb luck. Obviously there is a huge amount of luck in terms of circumstances that fuel every large company, but I find it really annoying when people are so dismissive of good execution with this type of hand-wavy rhetoric.
Oh don't worry, your masters at the labels and publishers got all their assets. Sorry you won't see a dime from them, either.
His paper "An Algebraic Theory of Polymorphic Temporal Media" has been a constant source of inspiration for me for the last few years.
Glad to see someone is doing this. Early Minecraft was so beautiful in its simplicity.

Although, a big part of that (for me) was the soundtrack. Just three short piano tracks by C418. I hope there's some way to include those in TrueCraft.
Singapore's sovereign wealth funds Temasek and to a lesser extent GSIC have been going on a bit of a tech buying spree in recent months. If you're a tech startup in the region looking for funding these guys would be your first port of call.
Two Factor Authentication. Please, all companies that have any of my data, don't just give me the ability to use 2FA, please force all of your employees to use it on their email, GitHub repos, everything. It should be a requirent right alongside https.

My personal favorite service is Authy, now part of Twilio.
110°F is going to be a problem even in SoCal potentially.

Though, I guess you could somewhat justify using solar power for cooling the battery when the temperature gets excessive. Presumably you'd be getting peak power at the same time you get peak temps.

-4F is definitely not that low, but at the same time when the house is heated, garage is going to get some of that heat as well.
And why parts of it are written in C.
In such a scenario, wouldn't an alternative/forked browser emerge with support for an HTTP/anonymous web?

There is also censorship risk in named-data and content-centric networking, which offer multicast and caching benefits, but rely on uniquely identified content.
http://fsharpforfunandprofit.com/posts/classes/ starts off with a C# vs. F# class declaration example. Particularly when you want to create a class with 3 member properties and a constructor accepting those 3 properties as parameters, you can achieve that in 4 lines of F# vs. 8 (non-curly brace) lines of C#.

This sort of conciseness is found all over the language as you keep digging deeper. I really recommend Scott Wlaschin's (link author) entire site. The best online resource for learning F#, IMO.
effectively zero until their battery factory is built, but their money is being put where their mouth is.
Funny that something called Tesla Energy brings back direct current to the home. I wonder how many people will catch that.
OpenBSD 5.7 CDs delayed
Batteries are not clean; lithium mines are one ugly slight and recycling is difficult: http://whenonearth.net/awe-inspiring-aerial-images-worlds-me...

In my clueless opinion these batteries should be used strategically in places where solar, wind, and hydro power are unavailable.
> it's possible to hook into it in such a way that you can make it scale to ridiculous sizes (see e.g. https://bitbucket.org/facebook/remotefilelog) cleanly, in a fully backwards-compatible way, without forking the product.

That's not entirely true. For instance, some of the scaling is going to require a new manifest format that is not going to be backwards compatible.
I feel like a backup generator is the last place where I would make my decisions based on the environment. I mean how long is it actually going to be active? Also batteries aren't exactly environment friendly either.
That is some killer state energy production credits. Now your plan makes complete sense.
That's crazy cheap. The closest competitor which comes into my mind is probably SMA Sunny Boy Smart inverter with lithium battery, costing more than double while offering only 2 kWh of energy (but includes a solar inverter).
... In C#
I actually really wanted him to put his "blue square" in context. Would have been interesting compared to land area dedicated to rooftops, parking lots or something.
For Australia - 19.5kWh in winter and 16.4kWh in summer.

http://energymadeeasy.gov.au/bill-benchmark/results/3660/4

It would be interesting to see what is the daylight vs. nighttime usage. And if you can daisy chain these batteries. Seems like a few would be needed to ensure for high usage days if you wanted to be largely self-sufficient.
Likewise for boats. It's high time we stop using lead batteries in vehicles where weight matters, and the pricing on this looks great.
A bit older, but this was the blog that an ex-coworker made while hiking the PCT for a second time: http://teamcolour.blogspot.ca/
Yeah, anyone in the northeast US with electric heat.
Apple tends to be pretty good at releasing 1.0's where the problems can be fixed as tech improves, rather than being fundamental design flaws (though they manage those as well.. coverflow)
I too have ComED (Schaumburg). From midnight to 5am daily, I can get power for 1 cent/kwh. If I were to shift all of my consumption to that time period, its effectively free.