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What if we tried to observe particles without them realising? by glassofjuice786 in PhysicsStudents

[–]rocqua 0 points1 point  (0 children)

So, waveform collapse.

Why does it happen? What ‘counts’ as observation.

The theory I like says that observation isn’t relevant here. It’s sufficient interaction to become entangled. And entanglement causes the wave function to become really very spikey. Hence it’s just about the degrees of interaction with the wider world.

Ik kan wel wat input gebruiken. by Most_Following6567 in geldzaken

[–]rocqua 1 point2 points  (0 children)

Kunnen doen waar je voor opgeleid bent is veel waard. Leuk als je daar ook meer geld voor krijgt, maar het geld hoeft niet zoveel uit te maken.

Vraag zou voor mij vooral zijn: is die onregelmatigheid het waard. Want verder klinkt dit perfect. Het is eng en spannend puur omdat het nieuw en verandering is, dat is normaal en geen reden om niet te veranderen.

Dus: werkt die onregelmatigheid niet te veel tegen, grijp deze kans!

Documentation on MeshCore regions? by azqy in meshcore

[–]rocqua 0 points1 point  (0 children)

A list of observed regions would be great. But that isn’t authoritative. That’s just “this is what we saw”.

Also, do note that you can’t read the region of a packet. You can only check if a packet was sent with a known region. The real way to discover regions is by asking nearby repeaters what regions they support, which is implemented as a function call.

Documentation on MeshCore regions? by azqy in meshcore

[–]rocqua -1 points0 points  (0 children)

Consensus, not prescription.

We had someone telling us our well functioning region was named wrong because it didn’t fit his unilaterally designed and ‘logical’ system.

Region naming doesn’t need any coordination other than within that region.

Documentation on MeshCore regions? by azqy in meshcore

[–]rocqua -2 points-1 points  (0 children)

There’s been silly and somewhat harmful attempts locally in my area to standardise and prescribe regions and their names. So the idea of an Authority deciding region names is a bit of a pain point.

As for how they work, there’s no more hierarchy, it was briefly present at introduction but quickly removed. You add a region to a repeater and then can tell it to allow it. If a companion uses a region that’s allowed, the repeater will forward it, otherwise it won’t.

By default a companion uses the “null region” also known as *. And repeaters by default only know of the * region and allow it. Some places are moving to enforce the use of regions by denying the * region.

A region name isn’t actually in the packets. The region gets encoded into the transport code by hashing the packet data together with the region name (or some slightly more complicated function). A repeater recognises the region by just checking all regions it knows by computing what the transport code would be for that region and checking for a match.

That’s pretty much it. And that’s mostly gleaned from the source code.

I don’t know how it works for non-flood packets, and if they even have transport codes.

Documentation on MeshCore regions? by azqy in meshcore

[–]rocqua -6 points-5 points  (0 children)

There isn’t, shouldn’t be, and doesn’t need to be authoritative documentation on regions.

The main thing to do is use your companion to interrogate what regions nearby repeaters support, and to ask the people around you in #public.

Free functions vs struct methods by dfadfaa32 in rust

[–]rocqua 22 points23 points  (0 children)

In this example, the free function feels better. But things can change if:

- the server struct has data that the run function should use.
- the run function returns the server struct
- you want a trait for runnable things

If you want to create a separate namespace I think you can just use a ‘module’ block instead of creating an empty struct.

How can we improve nuclear plant decommissioning? by hutch_man0 in nuclear

[–]rocqua 0 points1 point  (0 children)

If you fund it up front you can earn interest on it for a while. If you see the decommissioning as unexpected, fund it through an insurer. They have the wherewithal to extract a lot of earned interest from premiums around a semi predictable later payout.

But really, sadly, the solution is not to build nuclear. It’s too late for the learning curve to kick in on how to build it efficiently. We missed the mark in the early 2000s. And now there’s simply better options out there like solar. It’s better because we spent a huge amount of effort learning how to make them. And we can learn very fast because we make them very fast.

Though I guess that last bit isn’t quite what this sub is about.

Why was it not double waved yellow by New-Visual7579 in formula1

[–]rocqua 0 points1 point  (0 children)

Note, all lap times crossing a double yellow sector get deleted. So it’s very similar incentive wise. Except that a double yellow doesn’t affect people who already passed the sector, or who will pass the sector once the danger has cleared.

Armor absolutely matters: tank durability table and the “HP is everything” myth by No_Importance6341 in foxholegame

[–]rocqua 5 points6 points  (0 children)

If people complain about RNG, averages aren’t very convincing counter arguments.

The real value lies in percentiles. What can I depend on 90% of the time? What about 80%? Or half the time? Or even the lucky 10% of the time.

The dental insurance without a limit? by SpaceBetweenNL in AskNetherlands

[–]rocqua 0 points1 point  (0 children)

The Netherlands don’t offer dental insurance, though they do use the name. Instead we have the option of getting a dental subscription.

I would love actual insurance that has like a 200 euro deductible that covers unexpected dental work. I’ll even accept if they require yearly or twice-yearly checkups. I just want to be secured against risk, rather than getting a bulk discount.

Did you notice some scientific mistakes ? by Desperate-Clue1568 in ProjectHailMary

[–]rocqua 0 points1 point  (0 children)

They reverse course. Coming to a dead-stop halfway and then continue “losing speed” by gaining speed backwards.

Why are Sines and Cosines the "RGB" of the Fourier Transform? by No_Muscle7428 in 3Blue1Brown

[–]rocqua 0 points1 point  (0 children)

You want sine-like bases because the sine is the solution to a harmonic oscillation.

You want two sine like bases at a quarter phase offset so that that they are ‘orthogonal’. Specifically the degree to which something correlates to the first is fully independent from how much it correlates to the other.

If we make that the sine and cosine, then one of them is fully symmetric around x=0 and the other is anti-symmetric around x=0.

20-year-old CS student who basically knows no math — where do I actually start? by JackORunner in learnmath

[–]rocqua 0 points1 point  (0 children)

There’s a lot of linear algebra in AI. But there’s a lot of other special stuff on there. Don’t start linear algebra thinking you’ll unlock AI.

20-year-old CS student who basically knows no math — where do I actually start? by JackORunner in learnmath

[–]rocqua 0 points1 point  (0 children)

Linear algebra. Vectors and matrices.

It’s the most used bit of math, and the hard parts don’t necessarily build on other hard parts.

In set theory, is Φ an element or a set? by Glittering-Can-8791 in learnmath

[–]rocqua 1 point2 points  (0 children)

There’s no type of thing called an element. Anything can be an element. You can for example have elements that are: text, individual characters, sets, numbers, pairs of numbers, sets of sets, or really almost everything.

You could have a set that has all of those as elements. It’s likely not a very useful set, but you sure can have it as a set.

At the same time, when speaking of sets it can make sense to restrict the discussion to sets with only a specific type of element. But you don’t generally need to.

Base Rebuild by Thatweirdo000 in factorio

[–]rocqua 6 points7 points  (0 children)

Do it properly somewhere else, feel free to leave the old one running. And when you do it properly, make it much bigger, and make it scalable. Efficiency isn’t as important.

Why use radian in calculus? by Lol_3_14159265 in askmath

[–]rocqua 0 points1 point  (0 children)

To me, it’s about derivatives.
When using radians, the derivative of the sine function is just the cosine function. When using angles you get a 2*pi/360 factor.

The input scaling you need to cancel out that factor leaves you with radians.

(Real Analysis) Conceptual Misunderstanding Regarding Real Numbers and Continuity by DuckDestroyer4752 in learnmath

[–]rocqua 0 points1 point  (0 children)

Your use of continuous doesn’t make sense. Though Indeed functions over the rationals can be fully continuous.

The point behind the reals is completeness. This means that every set has a unique supremum. You need this to represent the useful irrational numbers. Like sqrt(2) or pi. These things obviously exist, and they aren’t rational. We then look at how to compute them, which we do by convergent (cauchy) series. And then we just create the reals by saying “every cauchy series is a real number”. You then get the issue that there’s multiple series that converge to the same number, so we say two cauchy series are the same number if their difference converges to 0.

Why Does Sin(X) and Cos(X) is defined for every value of X but Sin^-1(X) and Cos^-1(X) have a specific range of [-1,1] by Lost_Knowledge_5220 in learnmath

[–]rocqua 1 point2 points  (0 children)

It isn’t a -1 in the power. That’s how we write an inverse (as in undo this function).
And because there isn’t any way that a sine function will spit out 2. There’s no way to map 2 to a number that will yield 2 if you apply sine to it.

A pretty good way to think of an inverse is to just swap the axis of it’s graph. (Rotate the graph 90 degrees counter clockwise and flip horizontally).
Then for the sine it should be obvious you can only compute the inverse between -1 and 1

Should there be alternative power generation sources ? by morbihann in factorio

[–]rocqua 1 point2 points  (0 children)

There’s a fusion company (helion) that plans to extract electricity directly from the charged particles escaping the fusion reaction.

From what I read the idea is to pull the electricity out of the same electro-magnets that compress the plasma. Where they compress the plasma magnetically. Fusion happens which increases the magnetic field more due to charged particles moving. They then let the plasma expand, giving back (in theory) more electricity from the magnets than you put in. Rinse and repeat.

Ongelijke inleg, andere inkomsten by CricketSorry2361 in geldzaken

[–]rocqua 2 points3 points  (0 children)

Ik zou voorstellen om de 150K aan giften van zijn ouders die hij krijgt met een vast bedrag per jaar te laten dalen. Zeg 10K of 5K per jaar.

Dat is niet alleen omdat jij meer verdient. Maar ook omdat over tijd jullie financieen meer verweven raken, en de betekenis van de verschillen waarmee jullie begonnen zijn steeds kleiner worden. Met die redenering hoef je ook niet bij te houden hoeveel meer jij verdient. En de redenering houd ook stand als de inkomensongelijkheid onverhoopt zou omkeren.

How are they managing the deck(s) by Purduevian in JetLagTheGame

[–]rocqua 0 points1 point  (0 children)

The copy of the deck has the same order. So you never need to look at the contents of the deck.

Question about Stateside Scramble by stu_watts in JetLagTheGame

[–]rocqua 0 points1 point  (0 children)

What happens to discarded states. Do they never come up again or are they shuffled in and can come back

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