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🧵 Thread (16 tweets)

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UltimApe@ultimape• about 6 years ago

I identify as a slimemold.Did you know that Physarum polycephalum is technically a non-Newtonian fluid?"The endoplasm appears not to be a homogeneous material, but to be composed of heterogeneous domains."https://t.co/abLucKhWW2 https://t.co/njVtDcRjED

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8/26/2019
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UltimApe@ultimape• about 6 years ago
Replying to @ultimape

Tired: Fluid identity.Wired: Fluidic computation.https://t.co/4DA1WDI4p2https://t.co/PxTdruF3Gp

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UltimApe@ultimape• about 9 years ago

I Identify as slimemold colony living in a remarkably damp exosuit to maintain homeostasis.https://t.co/LZ3DkFrLiu https://t.co/AQMoCbSqA4

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8/26/2019
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UltimApe@ultimape• about 6 years ago
Replying to @ultimape

Huh, apparently I'm the only person who's ever tweeted about slimemold as possibly being a fluidic computer by way of it being non-Newtonian? https://t.co/AIgLZYWkiQ

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8/27/2019
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UltimApe@ultimape• about 6 years ago
Replying to @ultimape

I wonder if blood viscosity changes depending on our mood. I know it gets thick in the morning plays a factor in heart attacks while shoveling snow... I wonder if it's classified as non-Newtonian?Wait... f*ck.https://t.co/6PkEerMQFw

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8/27/2019
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UltimApe@ultimape• about 6 years ago
Replying to @ultimape

Method and arrangement for measuring characteristics of a non-newtonian fluid United States Patent 6591664TL;DR: "we put a makeshift motor in a liquid & glassware and measured how it spun"If EMF impacts blood, we ought expect diff readings vs other viscosity measurements?

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8/27/2019
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UltimApe@ultimape• about 6 years ago
Replying to @ultimape

Viscosity measurement tech is basically "we spin a tube hooked up to a mouse optical sensor and see how fast it spins compared to an unloaded motor"https://t.co/E6ZKVjBiIm

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8/27/2019
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UltimApe@ultimape• about 6 years ago
Replying to @ultimape

I'm imagining someone taking a bunch of slimemold, forming it into a ball, and then seeing if it's bounces.https://t.co/2ST8lMktMf

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8/27/2019
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UltimApe@ultimape• about 6 years ago
Replying to @ultimape

That AMETEK Brookfield brand seems to have a monopoly on viscosity testing equipment.https://t.co/PedjQxuoCY

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8/27/2019
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UltimApe@ultimape• about 6 years ago
Replying to @ultimape

I love this"Falling ball viscometer, Cole-Parmer, $180[image of fancy medical device with a ball bearing]Falling ball viscometer, Homemade, $1.08[image of a semi-opaque tube, two rubber bungs, and a ball bearing]"https://t.co/vaxfI4G31t

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8/27/2019
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UltimApe@ultimape• about 6 years ago
Replying to @ultimape

So, you can automate this using light/lasers? This is obviously just a timing problem.https://t.co/JmwK5kGbOL https://t.co/q1doqwZVe6

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8/27/2019
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UltimApe@ultimape• about 6 years ago
Replying to @ultimape

Kugeldruckviskosimeter (loosely: "ball pressure viscosity meter")a design by Fritz HöpplerWikipedia says it was from 1932https://t.co/eKUkKRaJklBut the the patent (since expired) is listed as 1950s?https://t.co/dEcExW2UKJ

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8/27/2019
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UltimApe@ultimape• about 6 years ago
Replying to @ultimape

I understand that blown glass is expensive and this thing probably works in a wide range of temperatures vs the < $2 DIY version. But still, the gap between that and the $290 price point is absurd.https://t.co/iBSkoB2uIc

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8/29/2019
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UltimApe@ultimape• about 6 years ago
Replying to @ultimape

Do you need steel ball bearings to be certified down to the micrometer? Why not buy this $4000 set. https://t.co/6JJUDRwFfNI wonder what a comparable ISO 9001 Certified set is https://t.co/eEi7Ta87iUHow accurate can you get before brownian motion/noise impacts viscosity?

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8/29/2019
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UltimApe@ultimape• about 6 years ago
Replying to @ultimape

Apparently I have to know how to do math to figure that out."second formula gives an expression of the ratio of the drag force actually sensed by the ball falling in an infinite medium to that in the Stokes limit as a function of Reynolds number alone."https://t.co/do5e3mbClv

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8/30/2019
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UltimApe@ultimape• over 5 years ago
Replying to @ultimape

It turns out modeling flows of people as heterogeneous visco-elastic fluidics goes a long way toward discovering underlying rules of swarms.

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2/10/2020
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UltimApe@ultimape• over 5 years ago
Replying to @ultimape

"remarkable that something so mathematically simple could describe what is essentially a psychological phenomenon.[…]My colleagues went on to show how this simple rule could immediately be used to make fast and accurate simulations of pedestrian crowds"https://t.co/xTfHvNIbPg

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2/10/2020