skysight-inc/HackerNews huggingface dataset:
Oversupply will only cause the grid frequency typically to go up fractions of a Hz and if the power variations are slow enough the grid can easily match the change. Real problems turn up when the system has to shed or absorb load very rapidly.

But usually that's not the case. The grid is first and foremost a power delivery mechanism, not a precision timebase and besides some efficiency issues (resonant cores tend to work best at the frequency they are designed for, such as all transformers in the grid) frequency variation is expected and can be dealt with within limit without further countermeasures.

Far worse than frequency variation would be phase errors leading to massive consumption of power within the grid and imbalance in voltage between phases because it will cause generators or industrial equipment to either break or go into fault states.

Think of the grid as a massive flywheel and frequency variations are slowing down or speeding up that flywheel.

So even if the grid can't store energy directly it can absorb pulses quite well and there are devices that grid operators use that use superconducting coils at very low temperature to stabilize the grid even further. Siemens and a number of US based companies have had these in production for quite a few years, typically you'll find them right next to large windfarms.
Just making sure.

> I'm sure the demographics of Aldi customers is sharply lower-income than that of Whole Foods, but I dispute the idea that Aldi gets to play the standard-bearer of the working class.

Well sure, if you're in a food desert with nothing, then yes, Aldi would be amazing. But as you write, Aldis are usually in places where there are other options, and in those places, yes, they attract the poorer crowd and yes they are the standard-bearer of the working class. That's been my non-empirical experience anyway.

They also attract people who are tired of being ripped off for commodity conventional food.
This approach is used for air conditioning. When power is cheap (at night), a building's air conditioning system freezes a large block of ice. During the day, the ice is used to cool air which is then circulated in the building rather than drawing power to cool air through a traditional air conditioner.

http://money.cnn.com/2013/07/30/news/companies/new-york-ice-...
It doesn't really get worse over time. The amount of fragmentation is generally going to be proportional to the average transaction size.

In general, expect transactions to have two outputs. The payment, and the extra. And since outputs become inputs, transactions will average about two inputs too.

A few shavings might get orphaned here or there, but that doesn't have a huge effect on the operation of the rest of the coins.
> The 90% case here is "second", "third", etc.

Unfortunately, those cases exhibit poor style if they are mixed with cddr. For instance, I would never write this:

(when (and (consp (cdr x)) (consp (cddr x)))
(do-something (third x)) ;; ouch!
)

If we checked that cddr is a cons, we then want to access caddr (its car) or cdddr (its cdr).

Those first, second, rest and whatnot are really geared toward when the structure is a (proper!) list. If it really is just a proper list and we just want to be sure it has a third element, it would be more consistent to just do

(when (>= (length x) 3)
(do-something (third x))

Basically stick to one way or the other.
I don't know if this means anything to you, but, to be honest, I somehow got the same impression from the comment in question.
Ah, lots of paid work is always good news. I'm looking forward to reading about your next project, it helps with my inspiration as well. Make sure you don't spend too much time working, fun is important.
Another term for "economically liberal" is neoliberal. Of course, "economic liberals" run crying to "nanny state" when going gets tough, such as when housing bubble got burst. I am sure we wouldn't have these cost of housing problems now if bailouts never happened. Amazing how "laissez faire" works only in one direction for "economically liberal".
If the phone can get LineageOS, then it is fairly easy - just don't install GApps when flashing LineageOS to the phone. Alas, phones that are thus open are getting rarer and rarer :( .
Speaking of quote unquote improvements, the community act like bad actors influencing the forks aren't an expected outcome. Somehow only the correct improvements will happen, because reasons. Nobody will subvert Bitcoin, and if they do, well they weren't true believers anyway so ignore that and HODL.

...Even though a lot of the community seem to agree the major figures who pushed for Bitcoin Cash were Judases trying to cash in so major subversion of the code/market has happened at least once already.

There may be a way to make a real, usable currency out of these ideas. It doesn't exist yet in reality.
> If we could come up with a way of providing some sort of proof of individuality we would solve alot of problems.

I wonder how this would work.
Let's assume there was a database of public keys for every citizen of the world, and every citizen knew their private key - how could we use that?

Could we assign the right to mine the next block according to some deterministic pseudo-random algorithm that selects the next public key from the previous one? I guess that could work, though it would reqire some timeout in case someone is not interested in mining.

The next question, how do we define some sort of public-private key pair in a way so a natural person can only create a single public key and can keep their private key secret?
Pringles cans were really effective for me
From the article:

> I redesigned so much of the original game. So much of me went into it.

I haven't played the iOS version of A Dark Room so I can't speak to exactly how much change there is between the original web version and this one, but it sounds like it's not just a straight port.
Imgur reveals that 1.7M accounts were hacked in 2014
Looking back in my life when I was born a year after Tavish Armstrong, I just feel so, disappointed how my life turned out to be. I had similar dreams and hope but they didn't work out in the end.

Only if I told my younger self to actually go through the Macromedia Flash book I borrowed once in high school, I would have had my first glimpse in computing. But during my early days, I never had anyone who was remotely interested in computers. I wasn't great at socializing either which would have lead me to people who were in machines. There was AP CS course at my university but I never took it only because I thought it was too hard and instead took AP Calc.

Without any concept of computing or the power of programming, how can a kid get into life of software development? All the random success stories I've read of popular programmers these days, all of their younger days began with someone giving them a gift or some 'assembly' language computer and started from there.

Wish the pursuit of programming caught me much earlier in life than right now, went into wrong major and always thought about programming, programming. Having friends and family who aren't into computers didn't help either until last year. So much life was wasted.
This is a fantastic idea! Great write-up too.

My $0.02: send all spam callers to It's Lenny
https://www.reddit.com/r/itslenny/
The professor should write a meaningful intro text book and deliver it as a pdf, rather than use some $400 Wiley textbook they get a kickback from and the chapter and questions get resorted each year so that used books are useless. This is all a racket. Does anyone think that the 25/30 remedial students are going to pay for a $400 or more textbook when they've got more immediate needs (shelter, food, clothing) to pay for?
Cryptocurrency Mining on 65+ iPhones
> brings you back to square one

Not exactly, since C's constructor does not call A's directly. (On the other hand, base_class::base_class might just do the trick.)
The unspoken secret is own your home. Life is a lot easier when there is no rent.
It will dissapear more slowly here: http://handlr.sapico.me/Home/ByTag?Name=diy :p ( unfinished webapp)
The whole point of this exercise (if it has a point at all) is not to come up with acronyms with justifiable expansions, but to come up with something that is less newbie-bostile. I'm not sure CLR/CDR fits the bill any better than CAR/CDR. Part of the problem with CAR/CDR is that CAR is an English word that means automobile, and people get a little hung up on that when they first see it. Likewise, CLR is usually a shortened form of the word "clear". So I'm not sure that CLR/CDR is any better than CAR/CDR. One of the advantages of LHS/RHS and FST/RST is that none of those trigrams have any semantic baggage associated with them other than their intended meaning.
Heh. The worst I heard of was a professor (in a math class, IIRC) saying "this is obvious". A student questioned whether it was obvious. The professor looked at the board, left the room for 45 minutes (!), returned and said, "Yes, it's obvious."

Dude, if you had to think about it for 45 minutes, it's not obvious.
If it's a product he really wants and is only available via bitcoin payment, it could well be worth it.

I've paid $30 shipping for a < $100 item before when I really needed it to be delivered on time, so I can see paying a $30 surcharge to purchase an item.
It would solve identity theft almost as a corollary.
> his next question was not how much debt the students had taken on ... But instead of a courageous act of dissuading them

Can you explain how you arrived at this conclusion from the letter? The author literally transitions from "... watched videos, talked about movies and current events" to describing another event. There's nothing about what he said or did after realizing his students' academic inadequacies.
Well, it wasn't obvious to me in the early stages of my career. But maybe the problem was that I hadn't seen enough situations to have a decent grasp on what was "good" and "bad".
Hmmh, really? I thought they spend 6 hours on social media and another 4 hours watching TV? :)
Scroll down on the parent. He talks about the 704 instructions and not having a better idea at the time.
GearVR is really good for watching movies on flights.
An Alternative College Education
Local communities decide what sort of housing they will contain, how much of it to permit, and in some cases the price it will go for, along with the income ranges for eligible buyers/renters. Their interests are maintenance of status-quo or lower levels of crowding and traffic, deterrence of gentrification in renter communities, and boosting home values in owner communities.

Tech companies decide what products to build, who to sell them to, how much to sell them for, and how many people to hire.

If the Palo Alto city council planned Facebook.com the way it plans housing adjacent to the Facebook campus, they might grow at more similar paces.
TXR Lisp, a dialect with true conses:

1> (car "abc")
#\a
2> (cdr "abc")
"bc"
3> (cddr "abc")
"c"
4> (cdddr "abc")
nil
5> (caddr "abc")
#\c
Ah, that's a shame, it looks like that notebook is no longer available. Thanks for pointing it out. I'll remove the reference.
In case anyone missed it, 'amirrajan is the author of the submission :)
A photographer shot an awesome time-lapse of SpaceX’s recent rocket launch
Ah, okay, I somehow thought that a transaction with multiple inputs creates at least the same number of outputs.
> Proof of individuality still would allow people of power to use an army of identity soldiers (...)

Which would point toward some form of Proof of (Human Free Will + Random Selection) being the "ideal" mining scheme (at least theoretically). And all other schemes, being practical attempts to approach that as much as possible.
Yes, but blockchain technology is being investigated by a bunch of the large banks. If the banks figure out that the technology is useless we should be able to see that within 1-2 years.
Very cool! The function pointers bother me a bit, but hey, I'm a C++ programmer, and maybe link-time optimization is there now.
Ironically, if you want to exchange any significant amount of money for bitcoins online, you need to identify yourself by providing both your ID and a selfie to the exchange.
There are pretty big differences in production methods: http://www.businessinsider.com/why-eggs-refrigerated-united-...

EU eggs seem a lot safer. Refrigerating eggs seems very strange.
Bitcoin is an early stage technology that still hasn't
solved its scaling problem.

It's almost 10 years old, and they knew about blocksize bandwidth limitations early on. Bitcoin used to have a variable blocksize that would accommodate increased usage, but at a certain point they set a hard limit at 1MB. Petty bickering and control of the main discussion forums by a very small group of people (owners of bitcointalk, moderators of /r/bitcoin and blockstream investors and marketing team) shifted the goal posts and gave talking points to divert the concerns over technical limitations and possible solutions with no real implementations for years.

The proposed lightening network is based on an unsolved problem in computer science (routing optimization, LN thus maintains a map of all nodes be broadcast to all nodes), not to mention the LN design would rely heavily on centralized hubs of "liquidity providers" i.e. paypal style KYC payment processors - completely antithetical to the concept of "A purely peer-to-peer version of electronic cash allowing online payments to be sent directly from one party to another without going through a financial institution". LN conveniently favors large centralized liquidity provider payment hubs as the siphon for fees, which only becomes palatable when the alternative is excessive fees to miners on the underlying network.

https://medium.com/@jonaldfyookball/mathematical-proof-that-...

and they've been claiming it's just around the corner since 2015:
https://twitter.com/starkness/status/676599570898419712

Bitcoin is also not governed as a product, so incremental
scaling improvements are left for the user to use, and not
to forced by protocol.

This is false.

Users are subject to the developers, the moderated discussion forums, and the selfish incentive of miners/devs to extract financial value from users.

Bitcoin is suffering from a toxic cult like community, and questionable developer team.

Other crypto-currencies are working on solving the issues while BTC is being sold off to fund LN investors.
> antenna calculations are tricky.

Especially at high frequencies. One of the first things I did when I got access to a computer as a kid was to write an antenna calculation program for Yagi antennae.

Impressive gain by the way, a factor of 8 (almost 9 dB) from that super simple mod.
An attempt by Google to take over the Adblocking market and thus maintain their own whitelist which will obviously not block Adsense ads. I have already moved over to firefox
I wish people would be a lot more focused on Tim's experiment than Hockney's theory. Great documentary, and Tim is a great hacker and a participant in the community.
Which means that in the future it will be pretty much everyone who, say, owns a Facebook account.
Cryptocurrencies generically, sure. Permissioned blockchains are going to be huge. Medium to long term, decentralized validation mechanisms are going to get hit hard by double spends, and decentralized currencies will fall drastically when that happens.
On occasion, going against the grain (in case of interference from another transmitter) can help if you can polarize the signal somehow.

https://en.wikipedia.org/wiki/Dipole_antenna

Of course you'd have to do the same thing at the receiver.
The social control aspects are worrying; unmentioned in the article, but equally important, is the likelihood that this is likely to give a significant boost to China's competitiveness in biotechnology.
Really? I've been pretty critical of Bitcoin on /r/bitcoin and haven't been banned.
Wearable health monitors are really the future.

It's a marketer's dream: arrhythmia causes young healthy people sometimes suddenly drop dead without any prior symptoms. It happened to Sheryl Sandberg's husband. Sudden cardiac death kills 600,000 people per year with 50% having no prior cardiac disease. [1]

Hopefully the Apple Heart Study turns out to allow early detection of arrhythmia. Apple will end up selling millions of watches based on people's (myself included) mildly irrational fears.

[1] ttp://www.clevelandclinicmeded.com/medicalpubs/diseasemanagement/cardiology/cardiac-arrhythmias/
Oh, sorry, the linked story used to be different. I hadn't noticed it was changed.
It could also provide people in power with a reason to control or enslave other individuals to acquire control of the network.
The problem is, that companys are freed from the renewable energy tax- a aluminium hut for example is tax exempted and thus can use the generated green energy at the price point of nuclear/coal energy- which amounts to privat households subsidizing industry.
Many forget History. Especially since the fall of Berlin's Wall, capitalism went wild. The threat of communism disappeared. Beware the backlash. Capitalism is I believe the best way to move forward. We need to develop a more human capitalism. Profit must be share. Not just with investors, shareholders. We need to stop "maximization" profits by squeezing wages...lets aim to reasonable profits
> When the end user cannot even clearly define (or even decide!) what they want when a certain situation comes up, how could a computer possibly know?

Is it too hard to say “No program for you until you make up your mind about what you want” ?

---

seanmcdirmid:

> ”programming to think“

If the user wants to take this approach, I am more than willing to give them programming manuals and references to other learning resources. I don't want to be involved any further than that with it, though.
I was floored by the doublespeak in their statement. Freedom from cash?? I already have that. This is freedom to collect fees for visa.
Yes, I agree. The real cause of this issue.
Energy markets are not "artificial" markets. Prices, including negative prices, reflect the real-world balance, or lack of it, between supply and demand.

Negative prices create incentive for energy storage. Storage providers can generate revenue not only when returning stored energy to the grid but by storing surplus energy in the first place.
Only if that one is interested is his/her success and doesn't hate the subject. Plus, a child can be too shy to ask for an explanation.
Gain is effectively the same as amplification, any kind of gain achieved in a passive manner indicates some kind of directional compromise.

It also should work equally well when receiving and transmitting, whereas an amplifier would work for only one direction (so you'd need two, one to output more power, another to amplify the received signal).
Uber riders suggested to pay fee in NYC for increased congestion
> David Stork, an imaging scientist and former Stanford professor with a side career in computer-aided art analysis, was the major scientific critic of Hockney and Steadman a decade ago. One of his main counterarguments was that, using only a camera obscura, Vermeer would have had to paint upside down and the projected image would be too dim to be useful. Jenison figured out that using a second mirror solves both problems. So in his apparatus, the image is projected through the 4-inch lens onto a 7-inch concave mirror on the opposite wall, and then onto the 2-inch-by-4-inch mirror he’d have right in front of his face as he painted.

https://www.vanityfair.com/culture/2013/11/vermeer-secret-to...
I grew up with a Commodore 64 and then an Amiga 500. What I remember is that I had few books and a lot of time to study them. Moreover, these were much simpler computers than what we have today. Kids could understand a lot of the hardware and the assembler by themselves. On the other hand, It was harder to learn about algorithms and data structures. I didn't have access to the adequate instruction before college.
Quarter wavelength. Waves will flow around something smaller than 1/4 of their wavelength almost without interruption.
Ask HN: What do you do to deal with a lack of inspiration?
By lack of inspiration I mean having the desire to create but having no idea what to create.
LEDE – firmware replamecement OS for wireless routers and other devices
The Venezuelan mistake was putting all their economic eggs in the oil basket. That's not a capitalism-vs-socialism issue since capitalists have done similar (rust belt). Further, there are various mixes of socialism and capitalism that can be implemented: it doesn't have to be all one or the other.
Read Carroll Quigley, read Gioele Magaldi, combine.
Embrace Remote Work [pdf]
I would love an Electric S10 or Ranger Compact truck.
That's why I said high dimensional neural networks. There's been a lot of literature explaining why local minima aren't a problem in very high dimension loss surfaces.

Check any of the literature on this subject:
https://arxiv.org/abs/1611.06310v2

https://arxiv.org/abs/1406.2572

Local minima are something that people thought was gonna be a problem, especially back in the 2000s. They played around with small neural nets on toy examples such as yours, and thought it was intractable. It's the entire reason why neural nets fell out of the fashion in the early 2000s, and people moved towards techniques like SVM.

These toy examples don't generalize to high dimensions, and if you take a look at the literature, you'll see that the consensus agrees with my statement.
> It's almost 10 years old

In the world of science, that's nothing.

> Bitcoin used to have a variable blocksize that would accommodate increased usage, but at a certain point they set a hard limit at 1MB.

"They"? Who is this mystical "they"? https://en.bitcoin.it/wiki/Block_size_limit_controversy Satoshi added the limit early on and defended it as a deterrent to spamming the network.

> The proposed lightening network is an unsolved problem in computer science

Nobody brought up the Lightning Network, but it seems like you have an axe to grind here.

> This is false. Users are subject to the developers, the moderated discussion forums, and the selfish incentive of miners/devs to extract financial value from users.

I agree with this, I think Bitcoin governance has become overly political and increasingly territorial, with a cult-like worship of a sets of devs (and you belong in one cult or the other).

That being said, I have great faith in the implementation of blockchain based contracts and currency overall, even if Bitcoin is just one step on the long chain of its evolution.
You may enjoy Practical Object Oriented Design with Ruby by Sandi Metz. Speaks about OO software design in very clear and easy to grasp way.

I often share it with non-ruby devs because it’s about design much more than it is about ruby.

Here are a couple of talks by the author which examplify her style of thinking and approaching problems.

https://m.youtube.com/watch?v=29MAL8pJImQ

https://m.youtube.com/watch?v=8bZh5LMaSmE
Silly Ideas in Singapore: Bomb Shelters
I’ve only read the abstract (will read the full paper when I get home) and I think the authors are on to something. Our society with its emphasis on cold, mathematical calculation and material gain as the only valid measure of success, which proponents erroneously term "objective", while shunning the emotional "subjective" needs of people and leaving very little room for error, is becoming increasingly dehumanized.

The humanities = waste of time, STEM + markets = useful and objective [sic] ideology is bleeding the life force out of society. But people are not cold, hyper-rational machines. The academic Wendy Brown defined this system (which she calls neoliberalism) as follows:

What distinguishes neoliberalism is not simply a commitment to capitalism or to markets, but an effort to transform all spheres of human life in ways that render them amendable to economic calculation.

I think she is spot on. I am looking forward to reading this paper which seems to complement Brown's point. Thanks for posting it!