Hugin

joined 1 year ago
[–] [email protected] 2 points 15 hours ago (1 children)

Yeah. The thing that made me "get" quaternions was thinking about clocks. The hands move around in a 2d plane. You can represent the tips position with just x,y. However the axis that they rotate around is the z axis.

To do a n dimensional rotation you need a n+1 dimensional axis. So to do a 3D rotation you need a 4D axis. This is bassicly a quat.

You can use trig to get there in parts but it requires you to be careful to keep your planes distinct. If your planes get parallel you get gimbal lock. This never happens when working with quats.

[–] [email protected] 4 points 16 hours ago (1 children)

No. It's more what the previous poster said about encoding rotation. It's just not a xyz axes. It's current, charge, flux as axes. The trig is how you collapse the 3d system into a 2d or 1d projection. You lose some information but it's more useful from a spefic reference.

Without complex numbers you can't properly represent the information.

[–] [email protected] 20 points 21 hours ago

To show that hack writers didn't get what made the borg cool and scary. They turned then into normal boring bad guys.

[–] [email protected] 2 points 22 hours ago* (last edited 15 hours ago)

Yeah a good friend of mine has a PHD in math. I asked him how he would describe math. His answer was a set of rules for dealing with numbers. What's important is how useful the rules are.

[–] [email protected] 10 points 22 hours ago (3 children)

Yup. When you have a circuit that is not purely resistive the inductive or capacitive load causes the voltage and current to not be in phase. It looks like ohms law is being violated. However the missing part of the energy is in the imaginary component to be returned latter.

[–] [email protected] 4 points 1 day ago (1 children)
[–] [email protected] 7 points 1 day ago

Extended cut of The Big Blue. I watched it with my dad and new girlfriend. My dad was a big time cave diver and so was she. I like Luc Besson movies. Seemed like a good first meeting activity. I wasn't aware the extended had a fair number of sex scenes.

[–] [email protected] 14 points 3 days ago (1 children)

Or toss a flash bang in the crib.

[–] [email protected] 1 points 4 days ago

I have it on good authority that Lake Superior never gives up her dead.

[–] [email protected] 2 points 4 days ago
[–] [email protected] 2 points 4 days ago (2 children)

I get the joke but Auschwitz was in Poland. They were careful to keep all the concentration camps out of Germany.

[–] [email protected] 5 points 5 days ago (1 children)

One poll that shows them losing by 1-2% instead of 4-5%. I'll still vote and I hope I'm wrong but I'm Expecting a all the state wide races to go R.

I think the abortion rights amendment has a good chance of hitting the 60% required.

 
 

A portion of the Francis Scott Key Bridge in Baltimore has collapsed after a large boat collided with it early on Tuesday morning, sending multiple vehicles into the water.

At about 1.30am, a vessel crashed into the bridge, catching fire before sinking and causing multiple vehicles to fall into the water below, according to a video posted on X.

“All lanes closed both directions for incident on I-695 Key Bridge. Traffic is being detoured,” the Maryland Transportation Authority posted on X.

Matthew West, a petty officer first class for the coastguard in Baltimore, told the New York Times that the coastguard received a report of an impact at 1.27am ET. West said the Dali, a 948ft (29 metres) Singapore-flagged cargo ship, had hit the bridge, which is part of Interstate 695.

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