skysight-inc/HackerNews huggingface dataset:
Let me shed some light on how you can drive LEDs from an AC power source. Naturally the worst techniques are usually the cheapest. To add to the complexity, directives like EnergyStar are aiming for power factor >0.9 in lighting above 3W. Maintaining high power factor (sin^2 input power) while having low lighting ripple (constant output power) requires some method of of storing energy. In methods 1,2,3 (and 4 depending), neither high power factor nor good lighting ripple is achieved, but very low cost is.

Note that this info is for fairly low power LEDs. When you start having high power LEDs, regulations may require better power electronics, and the cost of the electronics might be amortized against the cost of the thermal cooling solution, etc, so you can make a more expensive electronics package.

1) By stringing ~ 180v of LEDs in series, and adding a current limiting resistor, you can drive the whole thing from the AC line. This has terrible variability (short light spikes every 60hz, and the thermal effects will change the LED properties so much that you could easily have 2x light intensity change as they warm up) and poor total illumination (as most of the cycle is spent with the AC waveform lower than the needed voltage. I haven't seen this in the wild, as option 2 isn't much more expensive and far better.

2) Use a single diode + capacitor rectifier to generate ~180v, and then have a similar string as in (1). This gives far better illumination (the capacitor will probably stay in the 160-180v range), but still has substantial 50/60hz ripple based on the size of the capacitor

3) Similar to (2) but use a full bridge rectifier instead of a single diode. As we are now driven by a rectified sine wave, the ripple voltage will ~half, and the ripple frequency will now be 100/120hz.

4) Many applications don't have ~60 LEDs in series, so you can't drive directly from the rectified AC line. The first stage is a rectifier, and a second stage most likely is a buck converter. The quality of the light out of this depends on how much you care about power factor. Chips like NCL30288, for example, maintain high power factor and fairly low lighting ripple. Most people won't notice this.

5) Particularly in higher power lighting, a separate power factor correcting stage achieves high power factor, and a second stage generates a constant current that should have exceptionally low luminous intensity ripple (if designed right). The ripple frequency should be in the hundreds of kHz as well, so I don't think any eye could notice this.

And don't get started on dimming, I haven't found a product on the market that does non-phase cut dimming in <20W lights.
I genuinely and literally also thought I would be unable to function without the medication. This is precisely what I mean by losing context. In just the past few decades the US has seen skyrocketing prescription and use of everything from psychotropics/stimulants to pain killers of various sorts. And what do we have to show for it? Skyrocketing rates of mental illness (which are often side effects of said psychotropics), a drug addiction epidemic, and most tellingly of all - a decreasing life expectancy.

Our bodies are annoying creatures in that many things that make us feel good or even feel 'right' are in reality absolutely terrible for us. Add a profit motive into making us feel good, let alone paired with some rather less than ethical players, and it becomes a very twisted system.
Quora was great years ago, but now it’s just a glorified Yahoo Answers full of ... non-answers and fake stories in broken English.
this site only indicates how much it will cost per hour to sustain the attack. it is unknown how long it could really take for attack to be successful, also as others pointed out - there's no incentive
But yes, most of these garbage tokens can be attacked. But it is quite evident to me that eventually people will understand that it is just Bitcoin that they need to follow to keep up to date with the field of cryptocurrencies. Others claim to bring cool concepts and technology but in actuality they don't work or are a messed up very large software project like Ethereum (and tons of projects don't are simply forks with no further development)
I think you're imagining gamified dog-on-dog rape in poorly lit parking lots, when really it's more akin to a 5 second livestock insemination procedure that the mother probably forgets about an hour later.
> I'd never own a Ferrari, but why would I need to?

Because you were raised poor, you still are poor, so your views on life do not revolve around one of the finest and most exclusive automobiles money can buy. You've never been in a position to be even remotely close to owning a Ferrari, so your brain has ignored the value they offer.

Yes. Driving a high speed status symbol can be rewarding. It can start conversations. It can get you access to groups of people who would never have looked at you before. Is it easy to write them all off on the premise of "if they wouldn't talk to me when I had a Honda, then they are vain and I don't want to talk to them?" Sure. But you'd be missing out on potentially meaningful connections. On top of that, hearing a visceral exhaust note while rapidly accelerating is adrenaline inducing. Does it get boring after 10,000 hours? Probably. But, what doesn't in life?

The same way a trust fund child never views owning a dump or being in debt. It just isn't in your payscale/range, so why waste the brain cycles?
Having spent a couple of years working for tech support for a large retail chain, I can confirm that this happens much more often than you might think. Non-technical users are floored the browser locking up, especially if the site starts to do something alarming like play an audio file telling them their computer is infected. If they were lucky and brought it to me in that state, I'd teach them about their task manager and how to close the browser, and warn them about visiting suspicious sites. But if they actually called the number, and in some cases, allowed the scammers to remote into the machine... all bets were off. There was no telling what we would find.
Severe climate change of that which is estimated if we don't change course would cause the deaths of hundreds of millions if not billions of people. Talking about installing more AC and changing property values seems to be missing the point.
You can also use any electronic rolling shutter with manual shutter speed - e.g. an Android phone with Camera2 API support and any of several camera apps with full manual settings. Set the shutter speed fairly high and preview or photograph the light source; flicker appears as scanlines, e.g. https://i.imgur.com/6kSoSfX.jpg.
It's not about the money.
I think it's possible that some people became rich because they were not satisfied with money they had.

They are just still unhappy with money they have because nothing changed about their happiness and their sources, they just got more money.
>would take months even if they started requesting them tomorrow.

All they have to do is start spamming notices.

It's up to the nerds to figure out how to implement them.

Or Jail.
At least they don't have an official censorship regime like we have in Australia and NZ. We're still banning books here... primitive.
It's the punishment for not getting the answer right! I thought the same initially, to show the explanation after every try but the explanation comes as reward once you get it right. You get unlimited chances to guess the wrong ones so might as well force the learning of the question and reward it with the info.
If Kanye wore Wranglers, I bet a ton of people would flock to Walmart to grab them to show off they wear the same jeans as Kanye.

Champion Athletic hoodies is something I’ve strangely noticed has caught on more after celebrities starting wearing them. I remember Champion used to be the “lower-tier” athletic wear below Nike and Adidas that was sold at Walmart, but now is being sold on streetwear websites.
Encephalogram lie detectors for dogs, as they roam the airport. Each day begets a new, ever more interesting layer of futuristic hell.

I can imagine lie detectors being deployed to test whether I was motivated to order a hamburger because of an advertisement I noticed.
I'd like Firefox to stop focusing on revamping the user interface every five minutes, that's all. Might be a start.
Why Not to Use Zhihu ?
---- from a netboy from china ... 2018-12-12 10:40:02
I'd say the article isn't entirely accurate. First off, it's not like they all still use EDIFACT today, XML APIs are there for years for all major GDS (Sabre, Amadeus, Travelport products), and there are multiple APIs with different capabilities. And some APIs are actually available via JSON transport. But that doesn't matter that much, really, there are countless reasons why pretty much all of these APIs are fucked up, XML/SOAP with broken WSDLs as a transport is really more like a minor inconvenience compared to everything else that bothers me when thinking about their APIs.
Ask HN: What are your favorite examples of good SaaS pricing pages?
Whether it’s a creative way of showing multiple tiers, upselling customers to a preferred tier, or just an example of a well executed page, what are your favorite pricing pages for SaaS businesses?
100k * 10% = 10k/year.

10% is about the best return you can count on (very optimistically) I don't know what country you live in, but 10k in the US, even for a single person, would put you far below the poverty line. No way you could afford that dental work after you pay rent on that. And let's not even talk about all of the other huge expenses that will come up later in your life.

$10m * 3% = $300k/year

That's a high end salary in the US. You could cut this number in half, and that would be ok too IMO. Less than some developers make. But you can buy a reasonable house, car, etc. Not a farrari though, unless you're irresponsible.

If you actually intend to live on this money forever, then the return you receive is really the maximum you can spend. And that's really not as much as you would think. Especially when you figure there will be some years where you won't earn anything (during recessions).

Again, if you live in an expensive country like the US. If you live in a poor country, maybe 10K is enough. But this article and these numbers, aren't really about that situation.
I have really been enjoying FireFox 62+ ... so fast. To hear about a long-standing bug is disappointing.
You're fucking crazy. $1m is enough.
Why Not to Use Zhihu

--- from a cute netboy from China , 2018-12-12 10:40:01
I don’t understand how that’s relevant.
That's not true at all. I'm a gamer and I LOVE reading books and I removed "pleasure books" (non self improvement books) because they actively disrupt my life much harder than games.

My favorite book series is 14 beefy books (800 pages some of them), I started reading them when 9 were out.

I read the first 9 in 1-2 months, doing ONLY THAT because I loved it so much. Same goes for the previous book series I read (I was 12 at the time, so my memories are not as solid).

I can play games for long hours, but I never end up in that same state where I don't do anything else for an entire month. Sure, there have been a few days where I played all day, but never months.

And I stopped playing games without looking back when I stopped liking them, or when I figured out they were bad for me (mmorpgs especially)
It is not advertisers who are all to blame. Pride and envy predate magazines and TV.
Probably, for the majority of users, it's best to show content which aligns with their opinions and interests to increase engagement. It's similar to the Google "Filter Bubble".
I thought this was a solved problem in most web browsers. Just show a nonmodal dialog for popups like in safari and chrome.
Why would you go along with a scam like that?
As a scientist: WHAT? You're saying that science is useless without experimentalists? (my side) Theorists do a lot of great work and I don't think any experimentalist would say they are useless. Sure, there is the playful banter of who's more important, but when it comes down to it we all know everyone is an important part of the system and that we need both.

Theorists set the groundwork. They come up with a lot of vague notions and then move to work with experimentalists to figure out how they can test these notions. How to "prove" it.

But saying they are "worthless"? That's just hogwash. Even if wrong, they aren't worthless. (Hint: most of the time they are wrong) And yes, economics isn't as rigid as something like physics. But it is pretty complicated stuff and they don't have as much of a history and basic principles. They may not be a hard science (or some might say not even a science), but calling an analysis worthless is just bad. And saying that in "normal science" (it's just science) things need to be testable to be useful is also just wrong. I'd call string theorists mathematicians, but what they do isn't worthless.

If this is really the way people think science is done, we've got a big problem.
> If somebody were to give me a hundred thousand dollars to invest, I am quite certain I could live comfortably for the rest of my life.

I'm really curious how you forsee this working out. Even if you can live comfortably on the federal minimum wage (about $15k/year) you're going to have to be able to consistently bring in something like 25% returns on your investments to stay afloat.
Not as if it matters, but it's actually 64x25 in most GDSes.
We can blame multiple companies for bad advertising at the same time. There is no priority queue there.
Understanding the life cycle of service workers
Pretty sure PWM has nothing to do with cheap LED Christmas lights, beyond the basic "periodic wave resulting in flickering" idea.
> The idea that the family has become such a secondary consideration in modern society, to the point that this mother is advocating to others mothers about the opportunity to vicariously know your own child via the Internet... It's nothing short of heartbreaking.

Great point. At the same time, I think there is an evolutionary pressure to rebel and fight against parental control. Those that were obedient and stayed quietly at home might have never ventured out to explore and discover new things. Eventually those that did, ended up spreading their genes better so to speak. If parent don't know what you're doing, they can't control you and tell you what to do.

Also I think at one level, parents might say, "don't stay up late", "don't date this or that person", "don't to go the dance club". But at the same time if the child listened and actually stayed in the house and were as obedient as the parent insists, they might eventually disappoint the parent.

Another thing that I observed is that some parents cannot handle this rebelliousness well and it spirals out of control. Ultimatums being uttered, other drastic measures, police being called etc.
There's no such thing as a stable coin. Only coins that haven't crashed yet.
From a US perspective, typeface piracy is impossible absent a design patent, as typefaces cannot be copyrighted (37 C.F.R. § 202.1(e)). Individual font implementations may be copyrightable, but if one can acquire a specimen, they may digitize or recreate that specimen. Also, only outline fonts are protected (due to the fact that most of them contain some sort of executable code), bitmap fonts are not copyrightable (and absent a design patent, there is no other legal avenue for protection).

This doesn't end the debate, obviously, for those outside of the US.
I’d say the point is that one can appreciate the beauty of bitcoin design without owning any, whereas appreciation of gold is much more tightly connected to physical interaction with a gold artifact. At least in sane people.
Right, because people who aren't versed enough to use proper digital redaction tools, know how to apply a Sobel filter?
ABCD study enrollment done, announces opportunities for scientific engagement
Easeus Partition Master 12.10 Crack and License Code Free Download
I don't know about anyone else, but in the case I were hypothetically independently wealthy, I'd still be miserable based on the fact that the system was still stuck in a mode where doing something I'd done would be required.

I don't believe "play or starve" economics are the be all, end all of human existence, but I'll be damned if I can figure out a way to make it work without just about everyone else being willing to "come along for the ride" as it were.
Off-topic, but the title (Bézier moi) sounds like "Baisez-moi", which in French pretty much means "Fuck me". Seeing how most people involved in the article are French I assume the title was chosen on purpose, in case any reader was wondering about it.
It's only a chore at the start?
Once I give a site permissions I make sure to save them, so on next visit it just works.

The impact on amount of traffic and load speed is considerable IMO and well worth the pain at start.
> 4. Wait, because operational expenses are cheap compared to the capital expenditure.

The problem with waiting is that you're sitting on a huge risk, because holding prices artificially high attracts new construction. If that price makes construction profitable then construction will continue to be profitable until prices come down. To keep prices from coming down, the existing speculators would have to buy all of the new construction. The vacancy rate would keep increasing until it could no longer cover the maintenance costs.

And the higher the vacancy rate gets, the greater the downside risk to holding vacant units, because there are more competing vacant units that the other owners could at any point decide to put on the market, causing lower prices that induce other owners to abandon the conspiracy and put their units on the market too. And the more vacant units there are, the more the price declines when the cartel dissolves.
Lol! That's amazing, good job!
Even highly regulated exchanges don't vet for quality like you're suggesting. Exchanges merely set disclosure requirements so investors can make their own informed decision but even that only goes so far. Herbalife is on NYSE and Tesla on NASDAQ, for example.
TOR is something I use only occasionally, when the need is there. Using it regularly would be too frustrating for me as TOR is godawfully slow even on a really fast connection.
I have had the sense that guilt plays a part in dissatisfaction with wealth, whether consciously or subconsciously. The way the economic system is set up, a person can only have money, wealth at the expense of others. I only have what I have because someone else has been deprived of it. Its difficult to enjoy something when at the back of ones mind, it is earned off the suffering (real or imagined) of others.

I came to this conclusion one night whilst walking along the street some time back. I wanted to buy myself a packet of fries. Not far from the door of chips shop, there was a woman there with three children, laying down cardboard preparing to sleep for the night. The sense of what turned out to be guilt and shame that came upon me was palpable. It actually hit me that I could casually walk in and buy myself something I didn't really need whilst here was a woman with three kids sleeping on the street with nothing.

Investigating my feelings further brought about I had so much compared to them. And what I had was not enough to make a real difference in their lives. Further investigation and thought brought about the idea that this might be the same not just for me, but for all people, getting progressively worse the higher up the wealth steps you go. The basic idea being that as currently set up, economics means that it is a zero sum game. In terms of money, either I have the 100 dollars or you have 100 dollars, we cannot both have the same 100 dollars.

This means, (and I am open to being corrected) that what I have is at the expense of another - my boss, my brother who is having a hard time making ends meet, or all the others who have to walk kilometres to get to work to save on money used in public transport.

My take away and current struggle is that at some point, in order to just live, we have to find a way to deal with this feeling of guilt - which in my case, took on the form of first denying responsibility and assigning blame on others (government & other institutions, parenting, poor decision making, lack of intelligence etc), or just ignoring it because 'there is nothing I can do' about it because 'I also have problems and I dont have enough to make a meaningful difference'. I still don’t have a good answer to this.

Thats my 2 cents.
I'm surprised there's no presets to subscribe (like AdBlock) for uMatrix.
"war on X" is code for "let's ignore ethics".
That statement is legal disclaimer that refers to a lack of guarantees because that is, in fact, the reality of the market. Probability is not an argument against it.

However, if you would like to discuss probabilities then the history of the crypto market only reinforces the trend of failure as discussed in this thread.
Which metro area, and do you intend to have a family?

The rule of thumb is that you can you can withdraw about 4% of your savings per year if you want them to last forever. $100k in savings gives an annual income of about $4000/year. There are places on earth where you can live on much less than that - my wife spent less than that for 2 years as a Peace Corps volunteer in rural Peru. There are very few in the U.S. Even in small towns, rent on a 1BR will run $400/month. That's already over budget. Here in the Bay Area, minimum rent is about $1000/month with roommates. Anything less and you're living in an RV. If you're really frugal you can live as a single person on about $20K/year.

Kids add a whole new wrinkle. An uncomplicated hospital birth is $20K if insurance doesn't cover it. A NICU stay is about $10K/day. Just the equipment to bring a kid home safely from the hospital and keep them safe (car seat, crib, high chair, diapers, babyproofing) can run a grand or two. Living in a 1BR is not really practical with a family (yeah, that's how my mom grew up, but her one non-negotiable as an adult was a house with a yard). Day care in the Bay Area is about $20K/year for a decent program.

I'm generally someone who thinks people overestimate what they need to spend to be comfortable by a lot - I saved 80% of my income, consistently, for a decade. Still, expenses go up a lot when you have kids, and oftentimes they go up a lot even without having kids, simply because inflation. I'm really glad that my top-line was quite high for the first decade of my career, because I have a number of friends from college who thought "Oh, I don't need a lot of money to be happy" and therefore took career paths that didn't generate a lot of money, then got to 35 and found out that their career path does not support having a family.
CFL stay semi lit between cycles
> France's bombing of Libya at the direction of the US is what started the migrant crisis

True.
Also, France played a big role in the (attempted but unsuccessful) destruction of Syria.
Sorry to be that guy but...

> Growing up in the 1960s in New Jersey was very parochial.

> I had never even been out of New England.

New Jersey is not New England. I am used to non-northeasterners making this kind of mistake, but wouldn't expect to hear it in Jersey.
Hey thanks! I actually found it on youtube if anyone else is interested
https://www.youtube.com/watch?v=DnPmg0R1M04
You may be misinterpreting the sums a bit here. $10m being "comfortable" simply means you can invest that conservatively, earn (say) 3% interest, and spend $300k/year without drawing down your nest egg. And while $300k is obviously wealthy, it's nowhere near private jet territory.
Kim Kardashian West, what type of toys do her childreen get?