skysight-inc/HackerNews huggingface dataset:
These are the sort of hazards that autopilot seems to handle well, the problems have been more about ambiguous lane markings and missing large stationary objects.
Tech Will Evolve After a Pandemic
If the 2019-ncov spreads to India we might have a little more leeway in meeting targets. China's air right now is the cleanest it's been in decades. You can see for yourself on those online pollution maps.
I like the example about the distributive law. But for the associative law, one could also simply write:

add(x, add(y, z)) == add(x, y, z)
There are two things I hate when dealing with maths heavy code.

1. Lack of operator overloads.
2. Long variable names.

The first I find uncontroversial, the second is where I have met with disagreement.
The + symbol doesn't denote any particural operation mathematics. it widely used for vector space where commutativity is a condition though.

A symbol's property depend on the operation, the multiplication symbol for example is commutative in some cases and not in others.
True to a degree. Thanks to the huge influx of SV companies opening up shops in Eastern Europe, even if it's just outsourcing the "boring stuff", has led to an increase in local tech salaries that they're now rivaling Western Europe.
I worry about the coming increase in home working where companies aren't prepared for it. What if this paints a picture of broadly lower productivity for the practice across the tech industry? Could this then be used as evidence against home working more widely for the long term?
Windows is designed for all types of users though, not just yourself.
> I recall hearing a theory that having individuals with differing circadian rhythms within the same social group provided an evolutionary advantage as not all members of the group would be asleep – and consequently vulnerable to external dangers – at the same time.

This also applies to oncall rotations at software companies!
Given the extremely uneven distribution of money I suspect that you'd reach "couldn't afford exhaling" levels at one end before making anything resembling a dent at the other. I'm not against a carbon tax, far from it, but it's a difficult problem.

The most direct approach would be to levy the tax at the time buried carbon is taken out of its geological grave, but good luck enforcing that globally. The most realistic approach (still a total sci-fi fantasy, with plenty of room for a dystopian touch) would be a fundamental removal of resource extraction sovereignty, implemented through a combination of military force and buying out whoever is currently in charge of representing that sovereignty.
Operators are polymorphic. While the + operator is commutative when using on integers/float, it is not currently when used on lists:

>>> [1,2,3] + [4,5,6]

[1, 2, 3, 4, 5, 6]

>>> [4,5,6] + [1,2,3]

[4, 5, 6, 1, 2, 3]

In dictionaries it would behave differently as well (duplicated keys, etc.)
Learn to optimize project management with GitHub-Youtrack integration
What has climate tech achieved so far? Would the world be worse off if there were no climate tech companies?
> can't move on

It's not a lack of ability, it's a lack of desire. The lack of desire is directly attributable to a toxic culture.
Most editors allow searching all files in a directory.
I think that's what BIM systems are for:

https://en.wikipedia.org/wiki/Building_information_modeling
Would not be a hacker news climate thread without someone jumping in immediately with nuclear.

I am not opposed to the technology in a meaningful way but the problem is that the conditions in which nuclear can thrive - regulatory scheme, public perception of climate change risk, long time horizon infrastructure development, $$$ - non nuclear renewables easily outcompete.

I wonder how the nuclear folks think about this. The tech doesn’t exist in a numerical vacuum of efficiency and dollars per watt. It lived inside a complex ecosystem within which it doesn’t really seem competitive.
So sorry, my bad. Mobile Google fail :( thanks for vetting !
we already have `set1 | set2` for set unions

and dict keys are basically a set
How can we prevent sites like Getty images to claim copyright on these images and suing users who use these images ?
The only way to test is if you talk with an expert and he says you have understood. There are many things in linear algebra that you can use in practice even when you didn't really understand them.
This is the reason why self-studying certain topics is very hard, you still need (good) teachers to give you constant feedback.
> The average citizen would actually come out ahead financially

For a while. But if the carbon tax works and society switches to clean energy, then there is no more emissions and no more dividends pay to the citizens.
I'd vote for someone with that level of self awareness :)
Monad of No Return
Woah, relax there before you have a stroke. You're over-reacting and jumping to erroneous conclusions while fetishing and trivializing gross insecurity.

Open standards are obvious and essential, and as such a CA for one doesn't have to be owned by any corporation, and are best run by a real non-profit that is independent of governments and bias towards any particular vendor. The hardware manufactures would pay a nominal fee to have a perpetual certificate and millions/billions of people get devices that can't be snooped on from the outside by authoritarian regimes.
Photoshop is very limited by single core anyway due to so much of it being so old and still prefers to page to disk current version refuses to open at all with less than 10 gig free, not sure what feature they added that justifies this because it didn’t use to be the case.

You just take it for granted till you see After Effects blow it out of the water and not demand that much.

Apps for doing graphic work should be maxing out your machines power, that’s what it’s there for. When my rendering engine uses 100% of my two gpus it doesn’t feel sluggish it feels fast.
The typical thing that goes wrong with computers from the 80's and 90's is the electrolytic capacitors dry out and go bad. This got even worse with the "capacitor plague" of the late 90's/2000's.

I would guess the PDP-11 has fewer capacitors or of a different design.
It's almost like notation is a tool of thought, or something.
In principle I agree with this. But as a relative beginner to Haskell operators and their precedence levels are a barrier.

Operators/functions like `+` have well-understood semantics but I don't see how anyone could have an intuition for what `.:` does.

On precedence, I find myself wishing my editor could show me the expression fully parenthesised so I can see if I'm not mentally parsing it correctly.
How to Launch a Cloud Based Media Business
It doesn't looks so. Chinese scientist did research and found that virus was originated outside of Wuhan. It just became wide spread in Wuhan.
IMHO, it's from Koltsovo.
I have experience implementing similar models for analyzing and predicting customer spending behavior. The posted paper may be somewhat abtruse for the uninitiated, so I thought I'd provide some background knowledge.

As the title states these are probability models for describing the purchasing behavior of customers. The paper outlines outlines several models depending on if customers may purchase at discrete times or continuously, and whether the customer relationship is contractual or not. As an example let's take the "BG/NBD" model for continuous time, non-contractual customer relations.

We assume each customer, `i`:

1. Makes purchases according to an exponential distribution with mean rate `lambda[i]` [0].
2. After a purchase becomes inactive (never makes a purchase again) with a fixed probability `p[i]`.

And, across all customers:

3. The purchasing rate, `lambda[i]`, follows a Gamma distribution with parameters `alpha` and `beta` [1].
4. The inactivity probability, `p[i]`, follows a Beta distribution with parameters `a` and `b` [2].

This is a generative model of the purchasing behavior of each customer. The goal is to find values of the parameters `lambda[i]`, `p[i]`, `alpha`, `beta`, `a` and `b` that "fit" your data the "best". Emphasis here because there different notions on what "best" means, but the two main approaches are optimization (typically maximizing the likelihood) and Bayesian approaches which rather than finding the "best" value for a parameter, find a distribution over all possible values called the posterior.

There are implementations of these models for python [3] and R [4].

[0] https://en.wikipedia.org/wiki/Exponential_distribution

[1] https://en.wikipedia.org/wiki/Gamma_distribution

[2] https://en.wikipedia.org/wiki/Beta_distribution

[3] https://github.com/CamDavidsonPilon/lifetimes

[4] https://github.com/cran/BTYD
Probably would have been a 100-200 meg Fireworks file of Adobe hadn’t killed that.

Photoshop is incredibly wasteful in its resource usage to do UI design in.

(Fireworks had almost the entire feature set of Sketch but 10 years earlier for those that don’t know)
How do you deal with namespaces (or anything analogous like package names) there?

E.g. if you have a function named "+", it can likely clash with other functions named "+"

If the programming language supports function overloading that can be resolved through the types

By the way, I actually like RPN calculators, and low level stack based programming languages, where operators and functions also work the same way, but that is mostly interactive or for small self contained programs
That seems like a verbalistic notion of 'understanding'.

How do I falsify the expert's claims about my understanding?
CLI utils: you're missing the point. Of course you can write some simple terminal apps with common lisp, but can you name a single one that anyone who is not a lisp fanatic uses? If not, ever wonder why?

GUI: would you develop a commercial app (to pay your rent) in any of these apart from CAPI?

ML: You are joking, right?
I find it pretty amazing that this doesn't already exist as free software ... or does it?
Staying inside is pretty impactful, but washing hands regularly would be up there too.
No. That assumes that "add" is left-associative, i.e. it expands to add((add(x, y), z)). It's not obvious.
Building enough reactors is impossible in the time we have left. Especially if you want to go for unproven tech that is just now entering trials.
Documenting Spaced Cards from 0 to LAUNCH (and so on)
In case you did not know the abbreviations:

DAC: direct air capture

MSR: molten salt reactor
That's what I need actually, a 30-hours-a-day planet. So I can live perfectly in a routine like 10-12 hours of sleep and 18-20 hours of being awake.
For the uninitiated, "notation as a tool of thought" is a paper by Ken Iverson (https://m-cacm.acm.org/magazines/1980/8/10988-notation-as-a-...), creator of APL programming language
If it was a brand new flu, to which people had no immunity, which was initially covered up and then largely "responded to" by crowding everyone who might possibly have been infected into overcrowded, shared quarantine centres where they are now virtually guaranteed to get it, I bet they would have the same problem coping.
Any hoard of gold and jewels would have been pilfered by the politicians years ago.
> It might also be that your brain is just more used (years of extra experience) to infix notation.

Maybe infix notations is preferred because it aligns more closely to natural language grammar (for some languages)
I'm keeping up with the literature just fine, thank you very much. Nothing is nearly as definite as your comment would suggest.
It's not an existential crisis. That's not what the science says. There's no evidence that climate change will make humans extinct or end civilization. If that's not what you mean by existential crisis, then don't use that word because that's what it means.
A startup that simplifies the process/visualisation and makes it accessible to whoever is going to use it will always win!
I hope it won't happen but the Olympic could make it spread to countries the virus might not reach otherwise
I can imagine there exists advanced math where addition is also not commutative, yet they probably use `+` there too. Aren't you throwing the baby away with the bath water?
Reducing cognitive load [1a], transforming representations into something we can understand (e.g. x86 vs Python) [1b] and engaging our visual cortices [2] are all amazing things to get ourselves to be more productive.

[1a] Cognitive psychology: working memory 4 to 10 items

[1b] Cognitive psychology: I read it in some textbook how this works well, it also makes intuitive sense to me.

[2] This idea was stated out loud in one of 3Blue1Brown's videos, and well, in his case he demonstrates how true it is.
Equations That Changed the World
I understand your confusion, but in math the + operator does not have to be commutative either. It often is, but just like in programming, you can define in it anyway you want.
> Many programming languages abuse the + operator for string concatenation, which is not commutative.

This is why Julia uses `*` for string concatenation, which they claim is “more natural” than `+`. Not sure I agree - I’d rather see a completely separate operator for concatenation, such as Haskell’s `++` or Lua’s `..`.
Leaving the substantive comments to the mathematicians, this was an enjoyable read that was easy to understand.

Especially “Of course, it's definitely possible to overdo this -- then you get Perl.”
تحميل وتنزيل GBWhatsApp المعدلة نسخة تعمل مدى الحياة وبدون تحديث
Thorcon aims to transform a shipyard into a factory for these things. Their plan is to mass-produce 250MW reactors.
Taking Care of Business – 2019 as an indie RPG dev
And I'll find Suvorov's books.
Not the kind of source I'm waiting for.
I know of 2 European car manufacturers that can't build certain cars because they don't have parts from China (Peugeot 208 and Fiat 500L).

This is just a small example, but every industry is hit.
"Class" in the US is more explicitly defined by race then elsewhere, because the US was founded as a white supremacist slaveowning society.
> For some reason I feel like anything IBM does is overly complicated and over the top!

I think you've misread 'BIM' as 'IBM'. Building Information Modelling is a specific task for software, as the linked wiki page describes.
Straw man arguments do not belong on hacker news
Glad you found this useful! :)
Half-screen flyout menus has the power to beat thumb accessibility challenges.
otherwise the challenged would not understand my point ;)
You could ask the same of many of the responses. All of your examples are "strong" responses that reassure the public, like the flight restrictions which public health experts have argued against. By the way, public transport is, and has continuously been, running in most cities in China, and people in many cities (I have direct knowledge of Beijing, Shanghai, Guangzhou, Shenzhen, Zhuhai) are now slowly returning to normal life.
One danger of promoting carbon sequestration is that people might think that they can emit as much as they want, since its' going to be removed from the atmosphere anyways.
More dangerous yet, lobbies pushing this way of thinking to the public and trying to get away with more emissions: "Yes we are extracting oil, but we also spend X$ each year for carbon sequestration.

This is a little bit how these lobbies have been pushing changing personal habits "turn of the water while brushing your teeth, don't use plastic straws". Or also CO2 compensation (or absolution as I call it).

Not to say that we shouldn't invest in sequestration, but just need to be careful with the phrasing. This article does a good job, saying BOTH need to happen (reduction of emission and sequestration).
The minimum insurance (the one required by law in order to drive) only insures damages on the other party (injury and property). Basically the repair of the other vehicle or the fence I mow down.

What makes it cheaper than in the US (I assume) is that loss of income, healthcare costs is assumed to be taken care of by other (public) insurance, so that's not my liability if I crash into you. Put another way: car insurers can rely on the fact that everyone has other expensive insurance already. I already paid for the other partys ambulance through my taxes - I don't need to do it on my car insurance.

To take an extreme example: if I enter that I want a BMW M3 and I'm 22, the cost would likely be north of $700 per year, but it could be +/- 50% depending on whether it's in a city or rural area.

But for me (40+) the cost would be maybe up or down 10% from a couple of of hundred (say) so I wouldn't really be interested in shopping around. The reason is I shop around for my other insurance, where I have my nice call fully insured. That's a lot more expensive (Say $1000-$1500 per year and varies wildly). I'm likely to just insure my crap car with minimum insurance at a couple of hundred bucks at the same insurance company that gave the best quote for the expensive insurance of the other car. So I do shop around for insurance. Just not when I need only the minimum one. It's not worth the effort to save under $100/year to have multiple insurance companies.
HTTP: //wintersupplement.com/cbd-miracle-pain-patch/
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http://wintersupplement.com/cbd-miracle-pain-patch/

https://youtu.be/h7juaMAjNC8

https://special-offer4-health-review.storychief.io/cbd-miracle-pain-patch-99-pure-it-really-work-side-effect-review-pills-ingredients

https://cbd-miracle-pain-patch.hatenablog.com/entry/2020/02/26/150021
Right, but that seems to be exactly what the parent comment wants.
> People tend to think of there being only two versions of the economy available - the government tells us what stuff to make, or free markets determine what we make.

Then people are wrong. Almost no economy is purely one of the other - even the most "free market" economies have lots of government regulation, government spending makes up huge parts of their economy, etc.

> We would need a way of incentivising re-use, and of incentivising companies to make things re-usable. Currently the only way to make more money is to make and sell more stuff.

Totally doable in a completely free market way. You tax externalities.

This is basic stuff - economists generally agree that if you set up a carbon tax, people will use less carbon.
Hahaha. That's awesome. :)

Speaking of things that look silly dept.:

Many moons ago around 1998 in uni, I had an HP 48 graphing calculator which was both programmable and had a very powerful IR LED that was usually used for serial transfers between similar devices. It so happened that some enterprising soul made a customizable, preset and code-learning IR remote control app for it that worked, so I put the brand of the lecture hall's 4 TVs in it. From the back of the room, some 15 meters away, I subtly turned on all of the TVs with a phreak'n calculator. Disbelief, confusion and hilarity ensued.
It's also not commutative on strings and that is the case in many languages, not just Python.
The world need on the order of 100k 250MW (thermal) reactors to replace today's energy consumption. How many are they planning to produce per year.
Developers don't like to pay for software libraries so it was an uphill battle. My co-founder (our "COO") moved on because he got a very lucrative offer. I wanted to buy out his 50% of the business, he asked for a 40x multiple of yearly revenue. (For context, online businesses usually go for 2-3x.) In this stalemate, I did not want to continue growing the business with him owning 50% of it. Now that revenue has, through years of inactivity, died down to essentially 0, he agreed to let me open source it.
Is this calculation as simple as: it takes order of 10 years to build a reactor using existing tech, and we don’t have that long left?
You could also plant 100 trees every month for the same amount, and in 5 years you would have a small forest + removed 1079 tons of C02 instead of 60.

In 10 years, you would have 12000 trees and removed 4283 tons of C02 instead of 120.

Trees are not really the best carbon removal tool that one could hope for, but at least they're a decent comparison.

PS: Very approximate carbon removal per tree per year rate of 5.9kg. Bigger trees can remove more carbon (>22kg for a 10yo tree) and the tree species also have a role to play, but you get the point, climeworks effectiveness is extremely small and you're lighting piles of cash on fire.
Yes I did! Sorry, edited the comment! Thanks
It takes a few hours too, but even if it doesn't get any votes it should still show up on one of the pages (click more at the bottom to browse more)
Angular HTTP Requests with Async Pipe
Somehow we manage to deal with gasoline and natural gas just fine and power grid with hundreds of thousands of volts. Hydrogen infrastructure is a solvable problem of fittings, protection systems, piping, odorants and storage. The Japanese government is betting on it heavily.

You complete ignore and sweep under the rug the loses of existing infrastructure by proposing creating more GHGs. Where are you going to magically get all of that energy to make that not-FF FF? More FFs? What's the point?
What would bundling this as an Electron app provide that just bookmarking the site wouldn't?

The whole thing probably takes less than a couple of megabytes.
Under Trump, the US implemented record / word-leading carbon reductions.

https://www.washingtontimes.com/news/2020/feb/25/donald-trum...
You don't need to compile it, there is already a precompiled version for macOS: https://binary-factory.kde.org/job/Kolourpaint_Nightly_macos...
Shima
hello
Uganda's 'locust commander' leads the battle against a new enemy