tim_hutton

9 ms·

1.
by tim_hutton 3y ago
Two orbital things we might look for: 1. Activity in geostationary orbits. 2. Orbits where the planet's year is exactly divisible by its day, eliminating leap years.
2.
by tim_hutton 3y ago
Fredkin’s Self-Replicating Cellular Automata: Sum the neighbors, modulo 2, and assign to the cell on the next timestep. Astonishingly this allows patterns to replicate in multiple directions across the plane. https://cellpylib.or
3.
by tim_hutton 3y ago
"According to biographer Robert Wright, the character Stephen Falken in the film WarGames was modeled after Fredkin." [ https://en.wikipedia.org/wiki/Edward_Fredkin ]
4.
by tim_hutton 3y ago
Did you know, cats are believed to be the only mammals that don't taste sweetness! To unsubscribe at any time, reply STOP to this message.
5.
by tim_hutton 3y ago
Sandy Crush
6.
by tim_hutton 3y ago
The only was I can remember which is port and starboard is by thinking about boarding an airplane. The steps/tunnel are always docked on the 'port' side, just as boats always dock on the port side. The cockpit/bow is alw
7.
by tim_hutton 3y ago
Not hidden in the knitting in the sense of the specific stitches (which is also very cool: https://www.popsci.com/story/diy/secret-code-messages-knitti... ) but it seems she needed the knitting needle to insert the
8.
by tim_hutton 4y ago
One route to understanding how CPUs work is to explore the computers that have been made in cellular automata. Golly ( https://golly.sourceforge.net/ ) has several, including one by John von Neumann, one by Edgar Codd and ano
9.
by tim_hutton 4y ago
I'm very skeptical of hydrogen as a general solution for reducing carbon emissions. It feels like greenwashing. "As of 2020, the majority of hydrogen (∼95%) is produced from fossil fuels" https://en.wikipedia.org&#
10.
by tim_hutton 4y ago
If this is true then Haskell's type system is Noether's Theorem.
11.
by tim_hutton 4y ago
This is an excellent app, it works very well. Thanks for linking.
12.
by tim_hutton 4y ago
> "02016" Thank you for preparing for the Y10K problem.
13.
by tim_hutton 4y ago
I need this for my Android phone to compensate for a burnt-in image.
14.
by tim_hutton 4y ago
"the sensation they are experiencing is not being cancelled but merely going out of fashion" - https://www.theguardian.com/commentisfree/2022/aug/14/terry-...
15.
by tim_hutton 4y ago
As a Golly file, so you can run it for yourself: https://github.com/GollyGang/ruletablerepository/raw/gh-page... (4kB) In Golly: File > Open Pattern... > open the zip itself (don't unzip first).
16.
by tim_hutton 5y ago
Gödel's incompleteness isn't a practical obstacle to proof assistants - it will never stop us formalizing proofs and searching for new theorems. It's irrelevant to their operation and will continue to be for all time. If Göde
17.
by tim_hutton 5y ago
Imagine how much nicer the cities of the world would become with many of the offices turned into residential. There would be a rebirth of local community.
18.
by tim_hutton 6y ago
French 79: https://www.youtube.com/watch?v=yAv5pLO37mE
19.
The Korteweg-de Vries equation – how do the waves pass through each other?(youtube.com)
2 points by tim_hutton 6y ago|0 comments
20.
by tim_hutton 6y ago
In another comment zestyping posted this video which also has spacetime contracting, in a sense: https://www.youtube.com/watch?v=wrwgIjBUYVc
21.
by tim_hutton 6y ago
This is a great question!
22.
by tim_hutton 6y ago
An object at rest is still travelling through time. In fact it continues to travel at the same speed through spacetime when you let it go. It's just that spacetime is distorted such that the straight line takes it across space too, as
23.
by tim_hutton 6y ago
With two space dimensions and one time dimension (2+1), an orbit in Newtonian physics is a helix. In general relativity that same helical path would be a straight line in an interestingly curved spacetime. Likewise I guess for the 1D gravit
24.
Gravity is not a force – free-fall parabolas are straight lines in spacetime(timhutton.github.io)
801 points by tim_hutton 6y ago|433 comments
25.
by tim_hutton 6y ago
e.g. Dual Photography: https://graphics.stanford.edu/papers/dual_photography/
26.
by tim_hutton 7y ago
Or camera feeds on the road that the car can access, to allow the driver to see around corners ahead of them.
27.
by tim_hutton 7y ago
Yes perfect regulation is impossible and yes it's an arms race but it's one we have to keep fighting. The alternative (less regulation) is far worse. We've tried that.
28.
by tim_hutton 8y ago
A strange game. The only winning move is not to play.
29.
by tim_hutton 8y ago
It's just a cloud of dust? From the thing that the elephant picked up off the dusty ground?
30.
by tim_hutton 8y ago
Yes, you are quite right. My question was poorly worded.

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