Toots for _thegeoff@mastodon.social account

Written by Geoff 🏴󠁧󠁢󠁳󠁣󠁴󠁿 on 2025-01-23 at 19:20

Fun fact from the Tech, Bugs & Rock'n'Roll podcast: the first transatlantic cable was burned out by an idiot boss who demanded the voltage be turned up for some reason. It took 8 years to replace.

At the beginning of those 8 years Abraham Lincoln was a lawyer. At the end of those 8 years Abraham Lincoln was dead. The whole Civil War played out without transatlantic telegraphy, even though it had already been invented.

(From ~53mins) https://www.youtube.com/watch?v=G3a0MxPZio8

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Written by Geoff 🏴󠁧󠁢󠁳󠁣󠁴󠁿 on 2025-01-23 at 18:56

Any #Fusion360 experts out there who can give me some advice on what seems like a simple thing but also seems to be impossible? (Basically changing the radius of a compound curve "fillet", but without the design history.)

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Written by Geoff 🏴󠁧󠁢󠁳󠁣󠁴󠁿 on 2025-01-23 at 17:56

If you're in Scotland expect an emergency alert on your mobile in the next few minutes. Storm warning for tomorrow.

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Written by Geoff 🏴󠁧󠁢󠁳󠁣󠁴󠁿 on 2025-01-22 at 20:32

Signed up to a bass tutorial thing - first thing I look at which would be useful to me (etudes) is a paid extra. Bit annoying. But then I open up the available tabs, and there's an awesome version of the Ghostbusters theme at exactly my level...so we'll persevere...

And it seems like a nice community for a few pounds a month, let's give it a go. First time I've paid to be taught bass (I owe you a few drinks, @gahlord), be interesting to see how much benefit I get.

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Written by Geoff 🏴󠁧󠁢󠁳󠁣󠁴󠁿 on 2025-01-22 at 17:55

The astounding thing about this for me is how the dogs seem to have developed a really good sense of proprioception about where their wheels are, so they can avoid stuff, like humans driving vehicles.

https://mastodon.social/@CAPETOK/113872604548028168

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Written by Geoff 🏴󠁧󠁢󠁳󠁣󠁴󠁿 on 2025-01-22 at 17:04

There's lots of science fiction stories about a single molecule being able to "infect" other matter. Ice-nine, grey goop stories, Borg/Cyberman nanoparticles, Strange matter etc...

But this is real, and scary. A particular crystalisation of an HIV drug was able to "infect" labs and production plants, making the drug useless.

https://www.youtube.com/watch?v=PccOwGEbtQU

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Written by Geoff 🏴󠁧󠁢󠁳󠁣󠁴󠁿 on 2025-01-21 at 22:57

"38% hydrochloric acid" (~12.4M) as you buy it, is a pretty rough estimate. And it needs a fume cupboard and goggles etc to handle, so once a year or so I make a few litres of roughly 4M, then I can use that to make the 2M, 1M, 0.1M etc that we use daily.

As long as know the actual "4M" concentration (e.g. 4.17M) I can do accurate dilutions, so I check with a titration when I make it.

Did my annual batch today. 4.00M

Sheer fluke.

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Written by Geoff 🏴󠁧󠁢󠁳󠁣󠁴󠁿 on 2025-01-21 at 18:28

@Theorem_Poem Is there an equivalent to a "Sunday roast" in your bit of the world? Not a big celebratory meal, but something a little more extravagant than the usual dinner, for a group, maybe once a week or three?

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Written by Geoff 🏴󠁧󠁢󠁳󠁣󠁴󠁿 on 2025-01-21 at 17:24

Remember that (hopefully satirical) Victorian era cartoon of a piano which played by the hammers coming down on the tails of different sized cats?

I'm not entirely convinced that doing it to music students with a piano controlled paintball gun battery is much better...

https://www.youtube.com/watch?v=yFIxf2gTg_k

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Written by Geoff 🏴󠁧󠁢󠁳󠁣󠁴󠁿 on 2025-01-20 at 22:07

Question on a school science technician forum today that seems to produce a reasonable consensus - and I tried it on my 6th years and they basically agreed:

What colour are biology, chemistry and physics? Either gut reaction or full on synaesthesia?

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Written by Geoff 🏴󠁧󠁢󠁳󠁣󠁴󠁿 on 2025-01-20 at 18:05

OK, finally, some common sense from Google. Now, if you could also stop using AI for my searches about hazardous chemicals, radioactives, laser safety, and give me a nice big "do not let AI interact with anything I do" button, that'd be lovely.

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Written by Geoff 🏴󠁧󠁢󠁳󠁣󠁴󠁿 on 2025-01-20 at 17:35

Great question from a younger student today: "...but if oxygen is needed for something to burn, and there's no oxygen in space, how does the Sun burn?"

Taking a couple of things they know, an observation, and going "hang on a minute...", nice.

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Written by Geoff 🏴󠁧󠁢󠁳󠁣󠁴󠁿 on 2025-01-19 at 19:57

Portmahomack today - cold and very still.

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Written by Geoff 🏴󠁧󠁢󠁳󠁣󠁴󠁿 on 2025-01-19 at 18:15

Just realised JWST data can't skew it, it's all in IR, this (I assume) is entirely created from visible wavelengths.

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Written by Geoff 🏴󠁧󠁢󠁳󠁣󠁴󠁿 on 2025-01-19 at 18:01

Just a hint of a light pillar at sunset tonight.

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Written by Geoff 🏴󠁧󠁢󠁳󠁣󠁴󠁿 on 2025-01-19 at 00:53

But of the suggested names, I still prefer Michael Howard's "Skyvory".

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Written by Geoff 🏴󠁧󠁢󠁳󠁣󠁴󠁿 on 2025-01-19 at 00:51

"Cosmic Latte", the average colour of galaxies. Although this is from 2003, the JWST data may well have skewed it. #FFF8E7

https://en.wikipedia.org/wiki/Cosmic_latte

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Written by Geoff 🏴󠁧󠁢󠁳󠁣󠁴󠁿 on 2025-01-19 at 00:38

The big problem in modern physics, badly stated in terms of playing bass, is how to play fretless with the notes accurate to exactly a round number of Hz. Not 261.01, not 260.99, but 261.00 EXACTLY. And the same for any other note. On a fretless.

(Long story short, quantum mechanics requires steps at times, relativity requires a smoothly changing spacetime, the mathematical systems don't mesh yet.)

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Written by Geoff 🏴󠁧󠁢󠁳󠁣󠁴󠁿 on 2025-01-16 at 22:24

Geoff and E, at the printer. Their adjustable spanners wide.

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Written by Geoff 🏴󠁧󠁢󠁳󠁣󠁴󠁿 on 2025-01-16 at 22:19

Spent an hour getting a fellow technician up to speed on the fundamentals of 3D printing today. I normally work as a lone tech in a bigger team, so being able to talk in "my language" was lovely. Just stuff like:

"...and you tighten the nozzle..."

"...brass into steel?"

"Yeah..."

"So decent fit socket and easy?"

"Totally."

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