mferraro89

6 ms·

1.
What is the inverse of a circle?(mattferraro.dev)
224 points by mferraro89 5y ago|45 comments
2.
The Joule-Thomson Effect and Models We Know(mattferraro.dev)
83 points by mferraro89 5y ago|22 comments
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by mferraro89 5y ago
Did this article at some point give up and jump straight into something too difficult?
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by mferraro89 5y ago
ha, thank you for your honest feedback. My intended audience is not PhDs or math majors, it is high school physics teachers, practicing engineers, programmers, precocious high school students, etc. Many of these people benefit from some def
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by mferraro89 5y ago
thanks! the 3blue1brown website has some great written content that you may enjoy: https://www.3blue1brown.com/#lessons
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by mferraro89 5y ago
thank you! It took a whole month to get the 3D illustrations working well.
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by mferraro89 5y ago
why? too clickbaity?
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by mferraro89 5y ago
Hi. I wrote whole section on the history of GA and what happened and why it isn't already the norm, but I chose to remove it because the article is already far too long, and I don't think that my intended audience (engineers, comp
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by mferraro89 5y ago
hey, if you have time to detail those mistakes I'd be happy to fix them in the text. Can you email me at mattferraro.dev@gmail.com
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by mferraro89 5y ago
author here. I was mistaken about the 5 degrees of freedom bit. Bivectors have three. I'll fix the text tonight. I'm sorry you wasted ten minutes on my nonsense.
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by mferraro89 5y ago
Yes, a bivector has 3 degrees of freedom. I was mistaken when I wrote 5. I'll fix the text tonight.
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by mferraro89 5y ago
Author here: I was wrong about the 5 degrees of freedom thing. A bivector has 3 degrees of freedom. I'll correct the text tonight.
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by mferraro89 5y ago
yep that paper is extremely impressive! I would love to implement that approach as well, but it is much more computationally expensive. In the Q&A after a talk from that paper's author, he mentions that it takes about 6 hours for t
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by mferraro89 5y ago
Author here. At my day job I spend lots of hours debugging messy React code! The key is to have side projects too :)
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by mferraro89 5y ago
yep I think you're exactly right, as evidenced by the fringes.
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by mferraro89 5y ago
Author here. That's a fantastic question! I think you're right that a better solution would include adding curvature to the individual "pixels" in the lens mesh. Unfortunately I don't know how to manufacture anythin
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Hiding Images in Plain Sight: The Physics of Magic Windows(mattferraro.dev)
15 points by mferraro89 5y ago|1 comments
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by mferraro89 5y ago
You are correct! The simulation as written does not handle the no slip condition. The simulated "air" is inviscid and irrotational. You would need to tackle a few more things in order to have a really accurate simulation.
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by mferraro89 5y ago
Thanks for calling this out, I thought it might cause confusion. Matrices are super weird objects because they don't fit nicely into the {scalar, vector, function, operator} classes that maybe we're used to. A matrix is a function
20.
Poisson's Equation(mattferraro.dev)
766 points by mferraro89 5y ago|159 comments
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by mferraro89 6y ago
thanks you're right about the year! I'll fix that in the next update
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by mferraro89 6y ago
thank you for your feedback! I will incorporate all of this into my next draft!
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by mferraro89 6y ago
Very cool! A modern analogue might be LinuxCNC, which runs on old PCs in a realtime manner, generating pulses and sending them out the parallel port, or sending commands over ethernet to a dedicated step generator board for ultra accurate t
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by mferraro89 6y ago
haha no I'm not from Vancouver but I do love Canada. Living in Northern California.
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by mferraro89 6y ago
OP here: Teknic Clearpath servos are considered good value and come in lots of different sizes/price points. Wiring them up could not be simpler, but know that you need a windows computer to tune them. If you are comfortable with solde
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Everything you need to know to design your own CNC router(mattferraro.dev)
329 points by mferraro89 6y ago|166 comments