That house is a nightmare, I love it!

Also looks better than my CSS and the aspect ratio hints that it’s responsive but maybe doesn’t implement accessibility well. So we score half points there.

I use a trackball designed by a Canadian guy. It’s all open source but he also sells kits under the name ploopy.

I have gotten great milage switching to a ploopy classic trackball. takes strain off the arm and wrist, and using forearm muscles vs thumb and wrist muscles is better for fatigue and lack of injury.

Will let you know how keyboard goes. It’s pretty straightforward using the website in the screenshot. Wiring is just hand soldering a matrix. Would be expensive if buying printed parts and keycaps though. NFI why blank keycaps cost so much

2. I have been having issues with ulnar nerve subluxation, rare except in floppy people who lift weights which ironically I started doing to ward off other injuries floppy people often suffer. Anyway my mate who’s big into computer accessibility was talking about ergonomic keyboards, and I wondered if that might help since typing makes it worse. So I have been working on turning this weirdo:

Into a physical object. Much printing, ordered the parts today. Gonna be busy once they arrive as handwiring a keyboard matrix is going to be time consuming.

I used to run physics labs at uni so I’d hope I was as alright teacher still. Never made it as a real physicist though ;_;

Everything soft and slow like your brain yes.

It’s pretty hand wavy. The question: why is the speed of sound so slow? (which is essentially isomorphic to this one) is pretty hard to answer. I can’t do the the maths to derive it anymore haha.

There are similar things about light slowdown during refraction and stuff.

It’s just much easier to view certain bulk phenomena as waves in homogeneous material but it can be very unsatisfactory. Hence all the bullshit artists in this thread talking about speed limits, the standard model, and time dilation. For some reason “it just be that way ok?” feels more satisfying if the thing you’re asserting seems more fundamental, but it doesn’t really make stuff clearer.

So have to ask what a solid is to answer this question.

Sticks are quite complex, so lets consider a simpler solid: an elementally pure iron rod.

You can imagine said rod as if it were a fixed array of crystalline atomic cores surrounded by a jelly-like substance. In this ‘jellium’ model the atomic cores have a positive charge, they are the protons and neutrons, and the jelly has a negative charge. The jelly is the wavefunction that represents the electron structure in bulk. If that makes no sense, congrats on knowing your limits.

You’ve probably seen the more modern model of an atom where there’s a nucleus and around it is an electron fuzz with discrete energy levels. Or if you’ve studied at uni strange geometry representing a threshold in probability of finding the electron/s there on a given measurement (if not familiar under certain conditions reality kinda unfocuses it’s eyes and things that we often think of as points become volumes of possible effect). This is a good model of a single atom, but when we bring atoms together they change each other’s properties and the result is that these density functions (the weird electron cloud/shape things) start to blur together.

In our iron rod the electrons delocalize sufficiently we can kinda think of it as a weird jelly. A real stick is more complex, but can kinda be thought of as a stack of smaller jelly treats packed against each other.

When you push on the rod you’re mashing the jelly of your hand into the jelly of the rod, this causes a shockwave that begins to spread, it propagates like a ripple in a skipping rope or a bounce on a trampoline. But since it’s moving ‘amount of electron like properties here’. That makes some areas more negatively charged which drags the positively charged atom cores slowly after it. It moves much slower than the speed of light as we aren’t considering individual electrons which can move energy between them via photons, but the propagation of a disturbance in the collective arrangement of many that are tightly linked (we say coupled).

We can’t imagine a stick that is perfectly rigid because we would be proposing a kind of matter that does not exist, one which isn’t made of a lot of fuzzy electron jelly stuff but something else entirely. We can imagine matter where the jelly is very stiff, and consequently less energy goes into wobbling it all about and the squish moves forward very fast but that speed is still much slower than light because of this collective behaviour.

I don’t know why you are pretending to have physics knowledge when you very obviously do not have an education in it. What do you get out of pretending to be an expert on the internet? There’s no reward for it.

• Aceticon BcS Applied Bullshit

My mistake, that’s why sound travels at the speed of light.

It’s just not useful to talk about this at the level of the standard model. We are interested in the bulk behaviour of condensed matter, the fact of the matter is that you will not be able to tell that the other end of the stick has been touched until the pressure wave reaches the end. It doesn’t matter if individual force carriers are moving at the speed of light because they are not moving in a single straight line. You are interested in the net velocity.

Wikipedia isn’t a textbook. Don’t overcomplicate shit and mislead people because you’ve spent a few hours browsing particle physics articles stoned.

As it so happens the way the atoms push each other is electromagnetism, in other words sending photons (same thing light is made of) to each other but these photons are not at visible wavelengths so you don’t see them as light.

Wat? I strongly believe you are not correct. Which is to say, I think you are talking out of your arse entirely. If you push on a thing you peturb the electron structure of the material. These peturbations propagate as vibratory modes modeled as phonons.

While technically some of this energy is emitted as thermal radiation that is not primarily where it goes. And phonons themselves propagate at a slower rate than the speed of light, a significantly slower rate. Like a million times slower.

the OG Nazis were dumb as bricks lmao. Weird nerds with massive egos half of which believed in magic.

These stars are often a death sentence but hey that’s pretty cool. Good for them.

I appreciate the comment about vegan cooking just being cooking.

I used to wrench on motorcycles not push bikes but I assume the chain and sprocket are pretty similar.

Second replace chain and sprocket, they wear each other down together and introducing new components will mesh slightly differently causing too loose or tight engagement which can cause weirdness.

Also if new link is too tight, I don’t exactly know how a quick link works but this happens with botched rivet jobs on vroomy bikes anyway, then it might be lifting the chain slightly as it rolls over. Messing with the free play.

Yep, you’re going on the block list

It literally just means gaps. Academics use Latin to raise the barrier to entry and feel smart.

Sometimes there are highly specific terms that are difficult to render into English without overloading words but lacuna just means gap and anyone who uses it is a smelly bum bum.

Oh you’re not interested in studying lacunae? You know lacunae, a very normal word that is used in place of saying the cumbersome word gaps (ノ°益°)ノ

No no, the children are Hamas, the buildings are Hamas, the food is Hamas, the journalists are Hamas, the aid conveys are Hamas, the UN is Hamas, the ICC and ICJ are Hamas. It’s Hamas all the way down, or at least it would be if anyone had been harmed, but nobody has been. Neighbourhoods just sometimes collapse.

It probably does, unless it’s explicitly post menopause hrt. Regardless it’s fantastic news, well do I know how much having a hormone deficit can fuck up your life ;)

edit: seems it’s explicitly post menopause women. Find a doctor who will defraud the system, since the same reasons justify their inclusion for at least older transwomen where liver function is maybe not so great.