@tsrono@mastodon.social
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tsrono

@tsrono@mastodon.social

mostly music: https://tsrono.bandcamp.com/
i follow the #astrophotography tag & favorite a ton of great photos there. if you find yourself here because of that, please keep taking & sharing great photos!

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65dBnoise, (edited ) to random
@65dBnoise@mastodon.social avatar

Absolute nonsense plans for space generated solar power. IIRC, one of the studies was supposed to be delivered two years ago.

Such huge structures in space will be highly vulnerable to space debris or malicious attacks, to name just two apparently unsolvable security problems. It'll be interesting to see what the numbers say, when comparing the total cost for such a monstrosity with similar plans for solar power generation on the surface of the Earth.

https://www.theguardian.com/science/2023/sep/17/tim-peake-backs-idea-for-solar-farms-in-space-as-costs-fall

tsrono,
@tsrono@mastodon.social avatar

@65dBnoise lol wow. yeah that ain't happening in our lifetimes, if ever. so silly.

tsrono, to random
@tsrono@mastodon.social avatar

nap spot sorted

tsrono, to RadioControl
@tsrono@mastodon.social avatar

5:00:00 of tracks made for 2022, up now at https://tsrono.bandcamp.com/album/decoi-ei

a series of images of a wintery landscape stitched together showing a brightening morning

tsrono, to random
@tsrono@mastodon.social avatar

what if there is no time signature
there is no BPM
there is no key
no melodies
no beats
just sound

tsrono, to random
@tsrono@mastodon.social avatar

when that SD card is warm from recording & the gigs on file are many, the harvest seems promising

mcc, to random
@mcc@mastodon.social avatar

Reading the wikipedia entry on Machiavelli and… wait… what

tsrono,
@tsrono@mastodon.social avatar

@mcc if Spielberg had been the one to write the Unabomber's manifesto.

mcc, to random
@mcc@mastodon.social avatar

Now soliciting humorous captions for this image based on the implication that the sign refers to gay men

tsrono,
@tsrono@mastodon.social avatar

@mcc it's not v good tho. The Loneliest Time > The Loveliest Time

Metamere, to genart
@Metamere@genart.social avatar

Here are some stills from a nice configuration of that I found last night. I love the way things layered and developed. It felt like watching weather systems roll through along a lakeshore.

image/jpeg
image/jpeg
image/jpeg

tsrono,
@tsrono@mastodon.social avatar

@Metamere beautiful stuff

gregeganSF, to random
@gregeganSF@mathstodon.xyz avatar

See why a celebrity wandering through a mirrored hexagonal room would need 144 bodyguards to block one paparazzo from taking a snap of them, allowing for reflections. (H/T @math3ma and @emilyriehl)

https://www.gregegan.net/SCIENCE/Lattices/Lattices.html

Within a hexagon, a blue dot and a red dot wander around in circles, while a kaleidoscopic arrangement of 144 green dots respond in a way that blocks any reflection of the blue dot in the walls of the hexagon from being seen by the red dot.

tsrono,
@tsrono@mastodon.social avatar

@gregeganSF @emilyriehl is this a video game? it should be a video game.

mcc, to random
@mcc@mastodon.social avatar

Behold! My first ever FPGA project, functional

It simulates a one-dimensional cellular automata, displays it and its history on a 4x4 LED "screen", & collaborates with an onboard microcontroller (which actually could have run the entire thing to begin with, technically? but that's not the point) which DAC outputs audio based on the highlighted row bits.

https://www.youtube.com/watch?v=oz4tJGT-01s

I did some ABEL in college but that doesn't qualify as "FPGA". This was written in Amaranth (https://mastodon.social/@mcc/110833706042479220)

tsrono,
@tsrono@mastodon.social avatar

@mcc 👾

tsrono, to random
@tsrono@mastodon.social avatar

the bean era

tsrono, to random
@tsrono@mastodon.social avatar

writing

dulled glitchy greys greens blues and reds morph in waves and lines tracking across the visuals

mcc, to random
@mcc@mastodon.social avatar

Stridently demanding that every app add a "Dork Mode" so that it can be used by dorks

tsrono,
@tsrono@mastodon.social avatar

@mcc

johncarlosbaez, (edited ) to random
@johncarlosbaez@mathstodon.xyz avatar

Can you roll a ball with exactly enough energy to reach the top of a dome, and have it reach the top in a finite amount of time?

I'm going to idealize the hell out of this problem so we can easily study it using math. So: no friction, no air resistance... in fact, NONE of the sneaky stuff you're probably thinking about!

The problem is still tricky. For an ordinary dome the answer is no. If the ball has just enough energy to make it to the top, it rolls slower and slower as it gets near the top, in such a way that it never reaches the top.

But if the dome has a carefully chosen shape, the ball can reach the top in a finite time! This was pointed out by the philosopher John D. Norton, so it's called "Norton's dome".

For a full explanation go here:

https://sites.pitt.edu/~jdnorton/Goodies/Dome/

Thanks to @SylviaFysica for pointing this out!

Norton was mainly interested in another freaky feature of his dome. Say you start with a ball at rest on top of the dome. Then there are many solutions of Newton's law

F = ma

In one the ball remains at rest on top of the dome. But in others, it starts to roll down the dome in some arbitrary direction! Moreover it can start rolling at any time.

If you change the shape of the dome ever so slightly, this probably won't work. It needs to be crafted with perfect accuracy. So this is basically just a mathematical curiosity.

Math folks will realize what's going on: not every first-order differential equation has a unique solution given its initial value. But Norton, being a philosopher of physics, manages to make this a lot more exciting than a typical textbook treatment of the Picard–Lindelöf theorem. 🙃

Here's the math:

https://en.wikipedia.org/wiki/Picard%E2%80%93Lindel%C3%B6f_theorem#Example_of_non-uniqueness

tsrono,
@tsrono@mastodon.social avatar

@johncarlosbaez @SylviaFysica this has my 4am mind asking some questions (no expectations of answers just asking into the void): -how slight can the dome be domed…so if it becomes near-spherical does it get easier? -do you have to roll the ball in a straight line….or can you exert a LOT of force with it in a spiraling trajectory and reach the top just right? -what real world correlation is there, if any…an ever-so-slight bulge on a neutron star’s face?

br00t4c, to random
@br00t4c@mastodon.social avatar

U.S. Forest Service Plan to Plant More Than a Billion Trees Limited by Lack of Seedlings, Study Finds

https://www.ecowatch.com/forest-service-planting-trees-seedlings-limitations.html

tsrono,
@tsrono@mastodon.social avatar

@br00t4c let’s make it 2 billion

sundogplanets, to random
@sundogplanets@mastodon.social avatar

Impressive thunderstorm east of Regina a little while ago. Dropped half an inch of much-needed rain on us in about 20 minutes!

Livestock guardian dog status: extremely unhappy about the thunder (he let himself in to a barn stall and hid in the straw! Poor guy)

A bunch of neat, turbulent, grey clouds and dark rain behind a field and some trees
A very nervous looking yellowish fluffy dog, with his paw up on my leg, looking mournfully at the camera, standing on a straw-covered barn floor.

tsrono,
@tsrono@mastodon.social avatar

@sundogplanets 😍

tsrono, to random
@tsrono@mastodon.social avatar

writing

screen recording of a graphical equalizer of the audio in Ableton Live

tsrono,
@tsrono@mastodon.social avatar

@Metamere thanks 🙏 but it's kind of a structureless beat, like a few i've been working on over the last couple years...in this case it's coming from a VST sequencer that weights the chance (based on a subdivision of the tempo) of triggering one of 4 hits, and each of those 4 potential hits has a weighted option out of 3 drums it can trigger. velocity is partly randomized within constraints, & finally this is fed into a MIDI delay that can trigger the same drum or a slightly different one.

mcc, to random
@mcc@mastodon.social avatar

In "The Big Lebowski", Walter Sobchak reveals that his investigations of the man in the iron lung uncovered that he wrote "156 episodes" of the 1965 TV series "Branded", "the bulk of the series". However in fact Branded, which only ran for two seasons, only produced 48 episodes.

People of earth. You are being lied to

tsrono,
@tsrono@mastodon.social avatar

@mcc there are undoubtedly Coen Brothers Film Universe theories & guides online expanding on this. has to be.

tsrono,
@tsrono@mastodon.social avatar

@mcc Sobchak's an unreliable source of information, of course. but that doesn't seem the type of thing he would've been into lying about tho.

mcc, to random
@mcc@mastodon.social avatar

Starting another little WebGPU project. In order to justify spending time on a doofy graphics demo I think I'm going to claim it's a "tutorial" and write a blog post when it's done

So far all I've got is about 1/2 of a Tanzanian flag

tsrono,
@tsrono@mastodon.social avatar

@mcc is this with the FPGA thing you're working on?

tsrono,
@tsrono@mastodon.social avatar

@mcc oh oh, missed the first posts in this thread. i know my fave synth (Novation Peak) uses FPGA guts for its oscs etc. so when i heard wavetable-y sounds here i thought maybe you were using that FPGA project for making some audio here.

tsrono,
@tsrono@mastodon.social avatar

@mcc also i know nothing about WebGPU so i think i’m happy not to be confused? sounds pretty cool tho!

tsrono,
@tsrono@mastodon.social avatar

@mcc the bits about Khronos and Vulkan were getting very biblical/magical fantasy.

but really, this was surprisingly readable (until the last bits), and informative, for a non-programmer. thank you!

mcc, to random
@mcc@mastodon.social avatar

For the last year I've been semi-daily posting "What I'm Listening To Today" links in this thread:

https://mastodon.social/@mcc/108199886340178151

The thread is now so long it is increasingly breaking Mastodon, so I am making a new thread, starting here.

To recap, here's the entirety of the year-one thread in the most impractical possible format: A YouTube playlist containing 246 songs and running for just over 47 hours:

https://www.youtube.com/playlist?list=PLLIjft6ja7DP_GwDs3XuTbiFmHYTwJWa7

tsrono,
@tsrono@mastodon.social avatar

@mcc emotion? some kind of inquisitive wonder or burgeoning achievement's pride?

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