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Posts by Zeb

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Modelling of axisymmetric turbulence Where RSMs fail

Modelling on two edges of the Lumley triangle is much easier than general anisotropy. The traditional Reynolds stress models fail a constraint equation there.

#MathSky #CFD

stochanswers.com/studies/axis...

3 weeks ago 1 0 0 0

Some of us aren't so sad as to allow alerts from social media to distract us from life.

4 months ago 0 0 0 0

You must be anti-Newton then because Einstein was less wrong. Flat earth can be an appropriate level of science though, obviously, not as accurate as QED which itself is wrong.

4 months ago 0 0 1 0

Nice to read about an actual epicentre for a change. I got bored hearing about that secret lab under the market in Wuhan.

4 months ago 0 0 0 0

I always ask LLMs how do epidemics grow exponentially and they always respond with a dumb answer just like most people.

4 months ago 0 0 0 0

Why relativity? And why turbulence?

4 months ago 1 0 0 0

The ballistic equation. Rayleigh-Benard convection. Stress analysis of giant structures sagging under their own weight. All analysed using a uniform vertical gravity field implying that the Earth is flat.

4 months ago 0 0 2 0

So terse a reply that it is meaningless

4 months ago 0 0 1 0

Pseudo science. You mean like epidemics grow exponentially?

4 months ago 0 0 1 0

Only the second company to land an orbital booster. No national space agency has achieved that feat.

5 months ago 1 0 0 0
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I only knew the term from old radios

5 months ago 1 0 0 0

I've seen research that has failed critically because they assumed that the random variable was normally distributed.

Perhaps in tribute to a famous Belgian that was removed from the Index of history? (General knowledge crossword clue)

5 months ago 0 0 0 0
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Le Pétomane - Wikipedia

en.wikipedia.org/wiki/Le_P%C3...

5 months ago 1 0 0 0
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Mathematics is merely abstraction Three models that are the same

Three instances of the same Mathematical model. Tag, cards, NetLogo
#EduSky #MathSky #EpiSky stochanswers.com/company/abst...

5 months ago 1 0 0 0

Oops, should have said exponential growth. Obviously exponential decay is natural.

5 months ago 0 0 0 0

I hope it includes the word "exponential" and says that it has nothing to do with epidemiology whilst referencing Farr (1840), Kermack-McKendrick(1927), etc. etc.

5 months ago 0 0 1 0
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Epidemic The card game

I've seen several stochastic epidemic models that break the laws of Maths. The bridge between the two subjects is probability theory. You can use it to calculate the odds that an epidemic will grow exponentially.
stochanswers.com/education/ep...

5 months ago 0 0 0 0
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Minimal SIR model in NetLogo

This software may help,
stochanswers.com/downloads/ep...

5 months ago 0 0 0 0

Good luck. I hope you never say an epidemic grows exponentially. Although that was debunked in 1840, 1927, ... lots of people still insist on telling everyone that they failed basic Maths.

5 months ago 1 0 1 0

Then you should get back to Turin quickly before the local beer kills you. (I lived opposite the XXXX brewery, they used to make mango flavour beer)

5 months ago 0 0 0 0

During the mask mandate I wore a mask that I'd made from gauze. It had the same effectiveness as most others and the advantage that I needn't carry a knife to go with a surgical mask designed to stop pressurised bodily fluids from entering the nose and mouth when the wearer stabbed someone.

5 months ago 0 0 0 0

Every DAG has its day?

5 months ago 1 0 0 0

Will they be telling you next how to write ODEs? That would be lyrical.

5 months ago 0 0 0 0
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Epidemiological tag Maths in the playground

It's not hard it's child's play :-)
stochanswers.com/education/ta...

5 months ago 0 0 0 0
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And yet there are millions of Aussies, mainly on the coast. I once worked with them on a site with 4 different species of snake including the most deadly and an official snake catcher. We also had platypuses, Asian geckos (used to leave chalky white turds on my desk) and, presumably, spiders.

5 months ago 0 0 1 0

The first question that I asked Grok was how epidemics grow exponentially. So it told me. It should have told me not to be so silly and provided references back to 1840. LLMs are as ignorant as the average person. i.e. the weights are trained by "common knowledge"

5 months ago 0 0 0 0
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Discrete isotropic turbulence decay of

A DNS of turbulence model that nearly works and runs on a laptop. #CFD #MathSky
stochanswers.com/studies/deca...

6 months ago 3 0 0 0

"Self reported mask wearing" 🤡

7 months ago 0 0 1 0

A teachers guide to the modelling of epidemics
#MathSky #StatsSky #EpiSky #EduSky

github.com/stochanswers...

7 months ago 1 0 0 0
Do physical measures such as hand-washing or wearing masks stop or slow down the spread of respiratory viruses? | Cochrane

As I said Cochrane. e.g. 2023
www.cochrane.org/evidence/CD0...

7 months ago 0 0 2 0