FedX

joined 1 month ago
[–] FedX@quokk.au 3 points 1 day ago (1 children)

Yeah, check the oil levels every time I get gas.

[–] FedX@quokk.au 33 points 1 day ago (1 children)

Similar experience for my first time having they/them pronouns used IRL... I was mountain biking in full body armor, full face helmet, and goggles. Someone said to their kid, "let them go ahead, they'll be really fast," or something. I proceeded to hit 48km/h on singletrack, a speed I haven't replicated since. So I guess I was given a speed boost by the comment?

[–] FedX@quokk.au 15 points 1 day ago (3 children)

A WRX will always love you... if you give it the love they deserve. (If you don't your gearbox will explode and your head gaskets will disintegrate).

[–] FedX@quokk.au 73 points 1 day ago (6 children)

Of course. It's a Subaru Impreza WRX. Heck, looks to be a bugeye if my eyes don't deceive me. I probably did that when I got my first WRX...

[–] FedX@quokk.au 4 points 2 days ago (1 children)

Agreed. In many ways the idea of ideology is a reductive concept. All ideologies hold some amount of merit and problems. If you try hard enough, there is even a decent argument to be made for kings (no, I'm not arguing for kings, I am simply using it as a talking point). I really don't subscribe to any one ideology, and I don't think most people here do either. I like aspects of anarchism, socialism, communism and georgism, all have merits, all have problems. I suspect most people here are the same, we all come to different conclusions from different life stories. We recognize the problem, but our plan for the future by no means has to look the same. Honestly, the "leftist infighting" is our greatest strength, not a weakness.

[–] FedX@quokk.au 4 points 2 days ago

I don't watch YouTube on my phone anymore other than FireFox with uBlock. For me, it's all a YT feed aggregated by RSS and played by MPV on Linux.

[–] FedX@quokk.au 5 points 2 days ago (1 children)

What the fuck?! That application process is insane!

[–] FedX@quokk.au 2 points 3 days ago

Thanks, that does help some. Eq 22 is what I was reading, and yeah, it's a weird and confusing derivation. In reading Eq 22 closer, it's helpful, but not as helpful as I would have liked. What's funny in reading it is that it's also in correlation to q, which I would have expected to be calculated in terms of v. sigh maybe it would be better if I went through and derived the equations myself, would probably be more useful that way anyway.

 

I am trying to mathematical model a passive Magnetorheological damper. Broadly speaking, this would work by having a magnet sit on the damper shaft near the damper body. As the shaft moves, it would induce an eddy current in the damper body, creating a magnetic field. Not only would this magnetic field oppose the magnet's motion, but it would increase the viscosity of the magnetorheological fluid inside the damper body. On paper, this would rapidly increase the damping forces with increasing shaft speeds, allowing for more controlled shaft speed.

Fortunately, I found a paper discussing a damper similar to my ideas. Unfortunately, I don't really understand the math, and I need the damping force equation in terms of velocity to validate the application I have in mind. Linked is the paper I am referring to.

For my purposes, I would also want to model separate traditional high and low speed compression and rebound circuits moving through traditional mechanical damping circuits, along with some other damping features. However, that's a problem for future FedX, right now I really just care about the broad differences in damping characteristics as a function of shaft velocity.

[–] FedX@quokk.au 5 points 4 days ago

The posts about escape velocity (or speed if you prefer) are correct. To that I want to add the following: Gravitational effects technically never end with distance, only become weaker. It's also important to note that every object has a gravitational field, it's just that it needs to be ridiculously big for the force to have any real effect. Gravitational force can be described by the following equation: image
where r is the distance between the two objects, and the rest does not matter for us today.

This is the same as the inverse square law of light (this is a pretty good visual):

image

This means if you double the distance between yourself and a star, the strength of its light reaching you will quarter. This is also very similar to the math used to describe electric and magnetic field interactions, but I won't go into that today.

This is why scientists are able to measure gravitational waves from collapsing stars and quasars and stuff at the LIGO Gravitational Wave Observatory, just like how we can observe the light coming from distant stars. However, there is a point where the force of gravity becomes so weak as to be inconsequential, just like how at the edge of the solar system, the sun merely looks like a bright star. That is described as the gravitational sphere of influence, the rough approximation of the distance from a celestial body where it exerts the most gravitational force on a given object.

Escape speed is the speed at which an object must travel, given a distance from said body, to escape its sphere of influence. The Earth+moon have a sphere of influence of about 9.29E5 km.

[–] FedX@quokk.au 17 points 4 days ago

Nah, I saw salsa at first too.

[–] FedX@quokk.au 2 points 1 week ago

I am in this picture... I don't know if I like it or not, but I am in it.

[–] FedX@quokk.au 7 points 3 weeks ago

If your anything like me, that imaginary world is a horrifying character of the cyberpunk distopia we find ourselves in as a means of overt social commentary... So I'll take some laptop memory if you will.

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