skysight-inc/HackerNews huggingface dataset:
I'm extremely skeptical that ARES will ever be cost efficient. Potential energy is proportional to mass * g * d_height - any reasonable grid storage option will need to be moving truly enormous amounts of mass.

Back of the napkin here:

California consumes 9.54 * 10^17 Joules of electricity / year, or 1.09 * 10^14 Joules / hour.

Suppose we wish to hold in storage enough energy to supply to grid for twelve hours, since the sun does not shine at night. Assume we have a 100% efficient method of recovering potential energy stored on a train. Suppose we find a suitable mountain with a 1000 meter height differential. Then according to e = mgh, we would need to shift a load of 1.33*10^11 kilograms to supply twelve hours of electrical demand.

Let's assume we use the cheapest rock we can to fill this mass. I assume you can get wholesale pea gravel for $8 a metric ton.

Then the cost of gravel alone is $1.07 billion.

That doesn't sound so bad, but remember, this project will need ~1333500 100-metric-ton freight cars. Suppose they cost $120,000 / ea. Then suddenly, the cost of the train cars is 160 billion.

This is on the order of magnitude of the entire California yearly state budget. And also ignoring a bunch of other cost factors that will increase the total price by another 1-2 orders of magnitude.

Pumped storage hydroelectric is viable precisely because the reservoir holds your water for essentially free. Train cars are far, far more expensive.
Learning to Avoid the Golden Hammer
It's despicable behavior and bad for the future of NC state government. But it's neither fascist nor a coup. Expect court challenges.
Think on the bright side of things. Maybe web developers will need to clean up their crap and not pile on 20mb of JS.
I've relied heavily on search traffic / SEO, because it provides ongoing benefit even if I step away from it for a while.

It's an easy fit for the information-focused sideprojects I've typically created, providing the content needed to rank with no additional effort, but it can work for any project creator willing to put a little effort into creating content about their project and promoting that content (to gain links to their domain). And most importantly, it keeps me focused on creating something people want, because I'm typically expanding the project in areas where I see there's a high volume of searches (through keyword research tools).
Lots of places around the world not the US. Those buyers will continue to drag the price of solar down.

The US election doesn't mean a thing for the energy market. We'll be dragged along with the rest of the world by market forces.
Opens page, Looks for graphs, "Nope... no graphs...", Closes it
So 4 options:

1. make the good hospitals worse

2. make the bad hospitals better

3. combination of 1 & 2

4. ignore

Most people will want to choose 2 but inadvertently choose 3. When in reality we should have chosen 4.
Nice functionality. I feel like you should team up with the guy from BetterExplained.com who posts here. You both do a great job of trying to simplify and visually represent complex concepts.
Review suggests that teens benefit from later high school start times
Python has many ways to do just about everything (e.g., list comprehensions are completely redundant). It's a nice marketing slogan, though.
The type annotations are optional, so

fun square(n):
n * n
end

is a closer direct comparison to the Python program, for contexts that don't use annotations.
I see that they have to do that as a moral failing of capitalism, both that public schooling is insufficiently good for their children and that a worker's base wage is insufficient to provide for that worker's child's education.
I'm assuming you're referring to getting Net Neutrality? If so, I have a similar sentiment.
Pyret's implementation is by design very privacy-preserving (we don't just quietly make a copy of everybody's code, people have to explicitly share copies — we don't want to freak out students by surveilling them). But we do have some data that students have given us. In those data, we do not find evidence of case-sensitivity being a problem.
You would think it is the NSAs best interest to treat people who report issues within the organisation well, so that they don't go externally.
True, but all your math assumes that energy is used equally all 24 hours of the day. A large chunk of energy is consumed during the day, when the sun is shinning. Much less is used at night when the trains need to supply energy.
> In my opinion [1,0] is far more obviously an empty range than [1,1) but that's just what it is, my opinion.

On its own, I think that's a reasonable contention, but it doesn't work when combing intervals: [1, 1) combined with [1, 2) is still [1, 2), but [1, 0] combined with [0, 2] isn't [1, 2].
The oval office isn't around anymore.
I had the same thought. This puts an asterisk on the integrity of the report IMHO.

Doxycycline has also been shown to greatly increase life expectancy! Of patients currently suffering from bacterial infection.
How to Retrieve Deleted Photos from Sony Xperia XZ Without Backup
Exactly. The government can compel you to open a gun safe, and they can compel you to login to your computer. Those are both pieces of "evidence" not "testimony" (or as much as there can be a difference).
From what I understand, this _is_ Brillo. Just rebranded with some upgrades (e.g. "Brillo 2.0")
Read 'Do More' https://www.thesuccessmanual.in/productivity-skills-guide
V8 loves Node.js
I hate MD and this video helped me to understand why I hate it: they are trying to do judge by analogy, which causes «analogy driven design», where you should understand analogy to understand what you see. I newer saw real objects to behave like their imaginary «real objects». It looks like they are just getting money for something that nobody knows how to do properly, so they are doing something and arguing correctness of their work with self-made arguments. IMHO, if they will be hired to do an animation film, they will be fired pretty quickly for their «material design», because it looks false.
My sister, who looks younger than her mid-30s, was at a job interview wherein the founders told her they didn't want any "old people"

Any company so dense that they make statements during an interview that open them to legal liability is truly a company you don't want to work for. Because I guarantee there's a whole host of other stuff they aren't supposed to do as employer and aren't aware of it. Little stuff like, I dunno, "no, you can't put that in an employment contract and ask people sign it" or "actually, that's not how payroll works in this state".

Specific to your sister, if they don't like old people, I'll bet they wouldn't be fond of having girlz in their frat house, either. Unless she's cute, of course.
Many of our functional programming students are ~12 years old, and have not yet been exposed to any other textual programming language. They handle it just fine. They don't write lambdas, but they do actually use functions-as-values (without fully realizing it). It's really not a big deal, except for people who were taught otherwise and don't realize the fog that permeates their thinking!
I don't understand this obsession with the first derivative of value. GitHub already provides loads of value. I understand they need resources to keep the lights on, but they could do that by recouping a tiny fee from their users and most everyone would be happy.
> We're talking about 3 different technologies here

I'd be interested to know why we aren't talking about four different technologies, with the fourth one being wireless.

You can roll out fast broadband to large areas just by building a few towers to broadcast WiMAX. There's no "backhoe time" and you avoid the cost of digging up the streets.

IEEE 802.16m will now give you a gigabit to a fixed point

You could do the same with LTE but you need a lot more towers and I don't know about spectrum availability.

However, WiMAX seems to have failed in the US, with Clearwire shutting down in March...
I understood business-minded to mean sympathetic to the desire of the business community.
My electric bill barely gets to $200 in the hottest summer months. So, it would not change by a lot.
47 here. The network of people that I've built up over 25 years is still there. If I need a job, I just contact one and they just offer it to me. Why? Because I can do every phase of dev. I can build and maintain the project and budget. I can interact with the heads of all departments and leave them feeling warm and fuzzy. I get the job done. Usually ahead of schedule. I'm a fire and forget developer. If I applied for the run of the mill full stack position, I'd never make the cut. And I don't care because I never setup my future to fall into that hole.
How could you possibly take that away from the quoted material?

Firstly, he doesn't say that understanding COBOL and BASIC is a crime: he says that teaching COBOL and BASIC should be regarded as a crime. And he lays out why: he says that exposure to those languages causes some kind of mental damage, so he is likening the teaching of them to the intentional infliction of an injury. Clearly this is tongue-in-cheek - it is highly unreasonable to infer that he literally wanted the teaching of two programming languages added to the criminal code, because this is absurd on its face.

The intended takeaway is that there are habits of thought learned by use of BASIC or COBOL that are must be unlearned to think about programming problems in that way that Dijkstra recommends.
"Xiaomi's new Mi Band includes heart rate tracking and is priced well below any competition, making it more suitable for impulse buying than any other fitness band. Despite its worldwide growth in 3Q16, the company managed to lose market share as almost every other vendor outpaced its growth. Xiaomi, across all business lines, continues to struggle to gain any significant traction outside its home country of China."

Problem with Xiaomi have been more supply side than demand side. I know because I tried to buy MiBand 2 when it originally came out and for weeks most vendors were sold out. It's possible that Xiaomi is having trouble keeping up the manufacturing volumes at the low price point they've entered the market.
I'm really curious about how VR will solve the movement problem.

See, a virtual environment is only part of the equation. Oculus peeled the onion back further, with touch (and Vive equivalent).

How will they solve movement? Using a pad to move forward or backward is not nearly as immersive as walking...
Yes and tetracyclines like doxycycline affect mitochondrial function and may confound the research in that way too.

http://dx.doi.org/10.1016/j.celrep.2015.02.034
Trump is going to open those coal mines anyway, so don't worry. US is unlikely to lead the new energy revolution in, at least the next 4 years, I guess.
> due to having less muscle memory to have to subvert

Actually better than that: you can more directly transfer skill from one hand to the other if you’re making exactly mirrored motions.

This is why I think e.g. keyboard instruments should mirror the order of notes between the left and right hand parts. Then you can get away with learning one uniform set of finger motions, instead of two.
How Azerbaijan is trying to block main opposition media news
Do solar panels produce more energy that the amount required to create and operate them? (including mining the materials)
No, Python doesn't actually have a lot of things you need in education. See https://news.ycombinator.com/item?id=13189513
The Seattle Public Schools shifted times around based on some of this research. While great for students anecdotally it has been hard for parents with inflexible employers. This has also caused issues for after-school sports both for students and for non-school leagues as it reduces availability of fields pushing sports and other extracurriculars later into the evening.
It's not that some surgeries are being shifted from one center to another, its that no one at all will do them, generally to the detriment of the patient.
Perhaps the commentor is thinking rooftop solar.
> But we are still in the world where the CIA and the President of the USA can be publicly pressured into not waterboarding people anymore.

A world where the President and the CIA can be pressured into saying that we don't waterboard anymore. Respectfully, I think it's naive to think that waterboarding and much worse are no longer occurring at CIA black sites, and that the majority of these activities ever come to light. Obama passed legislation outlawing waterboarding, but what oversight apparatus did he create? Has he punished CIA personnel responsible for torture?
Because they don't tell you on the site:

Apollo Client is a Javascript library that can be used in any front end where you want to use data from a GraphQL server.

It's incrementally adoptable, so that you can drop it into an existing JavaScript app and start using GraphQL for just part of your UI.

It uses TypeScript.
From the fact sheet https://www.safercar.gov/v2v/pdf/V2V_NPRM_Fact_Sheet_121316_...:

What data is exchanged?
The data, known as the “basic safety message” (BSM), is
exchanged between vehicles and contains vehicle dynamics
information such as heading, speed, and location. The
BSM is updated and broadcast up to 10 times per second
to surrounding vehicles. The information is received by
other vehicles equipped with V2V devices and processed
to determine collision threats. Based on that information,
if required, a warning could be issued to drivers to take
appropriate action to avoid an imminent crash.

Will drivers’ privacy be at riskw hen V2V is deployed?
By design, the V2V system will not collect, broadcast, or
share information linked or linkable, as a practical matter,
to individuals or their vehicles. V2V-enabled vehicles
exchange only generic safety information. The system is
designed to operate without using any personal information
about specific vehicles or drivers.

The details are at: http://www.safercar.gov/v2v/pdf/V2V%20NPRM_Web_Version.pdf
See particularly "Proposed V2V Basic Safety Message (BSM) Content".
This includes a 32-bit random id, transmitting 10 messages per second, to include
time, lat/lng/elevation, speed, heading, acceleration, and yaw (yaw being the rate at which the vehicle’s direction is changing (i.e., the rate at which the vehicle’s face is pivoting towards the left or the right).

Range will be about 300 meters.

And this goody: A PER of less than 10% aligns with the ASTM standard E2213-03 (2003) 4.1.1.2 where “(2) DSRC devices must be capable of transferring messages to and from vehicles at speeds of 85 mph with a Packet Error Rate (PER) of less than 10 % for PSDU lengths of 1000 bytes and to and from vehicles at speeds of 120 mph with a PER of less than 10 % for PSDU lengths of 64 bytes.”

I expect real benefits when traffic lights could also transmit messages such as "Hey you people coming from the North and Sound, I'm going to turn red in 10 seconds."

And as an urban pedestrian, I want a portable unit. Sorry, Tesla owners, your "Ludicrous" mode may be periodically downgraded to "Meek and Mild" mode.
> A test like that only works when you swap like for like, and you don't.

Maybe I'm odd for thinking that black people and white people should be treated equally. But sure, let's pretend that racism is only possible to be inflicted on minorities.

> Saying "there are too many black guys in the senate" on the other hand is racist

No. It would be racist to say "there are too many black guys in the senate -- let's get rid of all of them!". The same applies if you say the same for white people.

> and actions to diversify tech are not racist against white people either.

I support diversity. But hiring only one group of people is NOT DIVERSITY. It's the _precise opposite_. Historical context or no, by definition you cannot claim that you're making a workplace more diverse if you're only making a decision to systematically hire only one group of people (even if they are the minority, because after X years they will become a majority).
The problem: Gravitational potential energy isn't a very efficient storage format. 1kg elevated 1m is only around 10j. A 10,000kg mass elevated 1km would be 98Mj- only 27kWh. And only with perfect conversions, which you won't get.

Each Tesla powerwall holds 14kWh for around $8000 each, and that price may fall over the.
Confused? Don't be! If you're happy with Racket, stay there. Racket is absolutely awesome. If you're using Gregor Kiczales's MOOC, you're learning from an absolute master. Pyret also has many things to offer, but you can sample them after you're done with the EdX MOOC. Come over to the Pyret list [http://www.pyret.org/discuss/] and drop us a note, and we'd be happy to guide you through.
>> the reservoir holds your water for essentially free

Once you build a dam, that is.
If anything I think my estimate is too conservative. Electrical storage must be adequate to meet demand in the worst case. The minute somebody's grandmother freezes to death because of brownouts due to wintry, overcast skies in December, and there will be riots in the state legislature.
Original submission: https://news.ycombinator.com/item?id=13189220
interesting.. would be interesting to listen to your explanation while listening to some of your music mr. glass. :-)
No one ever really likes to provide these numbers. Hopefully they are a net gain, but I'm a bit skeptical
> You're just brainwashing yourself because otherwise you'd find the prospect of mortality intolerable.

As someone who has suffered from suicidal depression and recovered from it, I am intimately familiar with the subjective sensations both of feeling like death would suck, and feeling like it would be desirable. Your subjective sensation that death sucks has nothing to do with the objective truth, it's just a reflection of the fact that genes that build brains that think that death sucks tend to reproduce better than genes that build brains that think that death is awesome. This does not change the empirical and theoretical fact that death is in fact an integral part of life.
It's hard to just "improve the risk adjustments." The statistics aren't there.

I agree patients shouldn't be left in the dark. The most important thing is getting the best care. There isn't an easy solution.

However, I think the existing solution hurts patients (and I have seen these risk assessments first-hand numerous times).
If one runs the numbers, Pumped Heat Electrical Storage should work fine for time shifting energy at scale. None of the technology needed is at all novel or untested. All of the technologies needed scale up very well. Basically you store electric power as heat using motor/generators and axial flow compressors/turbines. Storage media is 'a big steel tank of hot rocks'. One can quibble but the end to end efficiency is going to be better than 60%. Could be as high as 80%.

Far as I understand the reason such doesn't exist is there is no current market need until you have excess peak solar or wind power.
In doing a quick google search on this question, it seems to be "YES". Payback is in the 4 year range where the service life of the panel is in the 20-plus year range.
Except note that Pyret is not implemented atop Racket. It used to be (a #lang) but that proved not suitable for our needs, so we built a very sophisticated run-time system on top of JavaScript. Pyret now compiles to JavaScript entirely in the browser (and Pyret's compiler is written in Pyret itself, so it's all bootstrapped goodness).

That said, Racket is indeed a fantastic next language after Pyret. I myself constantly switch between the two.
Facebook is going to use Snopes and other fact-checkers to bury 'fake news'
If it's cheap to store the energy, and you can store it at large scale, the conversion factor starts to look less important.

If anyone had looked at the amount of energy that goes into an ICE car versus what makes it to the rear wheels, would we have autos today?
That's true, they are a high profile center in this field.
There are already large tariffs between China/US and China/EU for solar gear:

https://en.wikipedia.org/wiki/Growth_of_photovoltaics#Anti-d...
This isn't injection at all. No commands other than the find are being performed. Little Bobby Tables (Little Bobby Collections?) will not have any luck here.

In addition to the fact that you can't execute arbitrary commands with this example, the example itself is flawed. If the programmer's intention was to exclude "secret projects" from all searches, then they should have written the query to do that. They didn't, and allowed multiple other ways of accessing those records.

Writing some code that does something different to what you intended it to do is not a NoSQL injection, it's just bad code.
What I don't understand, is that with ageing billionaires everywhere, why isn't anti-aging the most funded thing in the world? Or is it?
> Would you enjoy a book or a movie that never ended? Obviously there's a market for such things based on the continued existence of daytime TV soap operas, but nobody seems to think those shows have much cultural value.

There are thousands of things I know I have never done, and likely never will. There are millions of things I don't know I have never done. Don't you have even the tiniest bit of regret of where your life has led you, and wondered if you did things differently, where you would be today? Wouldn't you want to find out?
You can get 80 meg broadband from BT Infinity with fibre to the street cabinet, so you might need to offer more than 100+.

G.fast extends the fibre closer to the house but I suspect it's not very cost-effective unless the take-up is high, so perhaps it will mainly cater to rich people in suburbia.

We've know that fibre (FTTH) was the answer since the 1980s but all British governments have been too short-sighted and stupid to finance it.

Of course, they dug up the streets to install new pipes for the short-term benefits of North Sea gas, and they can find £50 billion for HS2, when they could have FTTH for less.
A small but important distinction:

The justice system enforces the will of those who empower it. This has likely never been truly democratic. Not long ago it excluded blacks and women. Bias continues today evidenced by incarceration vs crime rates.

This is very distinct from implementing democratic justice.

Like any organization the justice system is fighting to stay alive - subject to selective pressures and evolution.
Great to hear from a happy customer!

Some more color commentary:

- Quotas can be a little annoying indeed, but they're generally there for a reason. Over time, we've moved BigQuery in direction of having less and less quotas in general

- BigQuery recently released ODBC and JDBC drivers, as well as Standard SQL support. so you can plug in your favorite desktop client

- On predictability of pricing, there are several flavors of proactive controls - cost per query, cost per user, cost per group, etc. There are reactive billing alerts as well. And as you get to Petabyte scale, there's a flat rate pricing model.

(work on GCP)
As neat as this sounds, in a Rube Goldberg sort of way, batteries seem more reliable without the moving parts. The new Lithium Titanium batteries are amazing. 10k cycle before loss of ~20% capacity and fast charge/discharge cycle of 6 min. Since they last a long time, less e-waste. And lithium is supposed to be relatively recyclable when the time comes.

We used to think building heliostats made more sense, but it turns out cheaper cells won out to complexity. I suspect this will be repeated in the energy storage market.

https://www.google.com/search?client=safari&rls=en&q=LTO+cel...
If you can, I hope you won't.

What could you be hoping to accomplish?
and I get (at least) weekly mail-in ads from the providers in my area... and when you subscribe, they replace the wire that goes from your house to the pole, but they use the same old copper (and some techs even tell you that it is fiber...)
when your biggest shareholder is on the transition team of the most nepotistic administration since warren harding, you betcha.