Reto Fiolka's Avatar

Reto Fiolka

@retof.bsky.social

Optical imaging, interested in STEM topics. First generation graduate from ETH Zürich Associate Professor at UT Southwestern Medical Center

2,888 Followers  |  1,066 Following  |  710 Posts  |  Joined: 03.01.2024  |  1.9885

Latest posts by retof.bsky.social on Bluesky

While the book is very depressing, there is one chapter that cheered me up:

How a mathematician overcomes depression using regression to the mean.

This so ridiculously silly, it may actually work for me.

12.12.2025 18:45 — 👍 0    🔁 0    💬 0    📌 0
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I am currently reading Innumeracy.

We were warned about the dangers of a society incapable of doing basic math 37 years ago.

How I wish elected officials, anti-vaxxers and conspiracy theorists would read that book😞.

12.12.2025 18:33 — 👍 2    🔁 0    💬 1    📌 0

Thanks for sharing!

Great news.

11.12.2025 20:54 — 👍 1    🔁 0    💬 0    📌 0
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Reviewer #2

The segmentation is astronomically bad.

What level of Otsu is this!

11.12.2025 17:44 — 👍 2    🔁 0    💬 0    📌 0
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@ilastik-team.bsky.social Thoughts on the (over) segmentation?

11.12.2025 17:39 — 👍 0    🔁 0    💬 0    📌 0

cc @astrokatie.com

11.12.2025 17:36 — 👍 0    🔁 0    💬 0    📌 0

cc @preibischs.bsky.social

It looks like they did not use BigStitcher, but an astro software to stitch multiple tiles into large mosaics.

Maybe once they do 3D stacks with Webb, they come to you😃.

11.12.2025 16:31 — 👍 1    🔁 0    💬 0    📌 0
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a little girl in a pink jacket is sitting at a table with a pencil in her hand and the words idk above her ALT: a little girl in a pink jacket is sitting at a table with a pencil in her hand and the words idk above her

My thorlabs stepper motor when I ask about its step size:

11.12.2025 16:17 — 👍 0    🔁 0    💬 1    📌 0
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a cartoon bunny says " say what " with emojis ALT: a cartoon bunny says " say what " with emojis

Stepper motor and Cam moves by 7.7nm?

11.12.2025 15:57 — 👍 0    🔁 0    💬 1    📌 0

And built in AO in the big mirror!

Yes, it is fabulous. Much bigger aperture than Hubble, and diffraction limited performance.

11.12.2025 15:49 — 👍 0    🔁 0    💬 1    📌 0

Nah, just differently shaped galaxies😇.

The far stuff is all galaxies, AFAIK.

The PSF is a bit funky, from the telescope design.

11.12.2025 15:36 — 👍 0    🔁 0    💬 1    📌 0
COSMOS-Web

255h of James Webb space telescope deep field images stitched together.

It starts out with a field about 1.5x the size of the full moon. Click the '+' button to zoom in.

Most of the dots are galaxies.

cosmos2025.iap.fr/fitsmap/?ra=...

11.12.2025 15:09 — 👍 1    🔁 0    💬 4    📌 0

Grace Hopper’s visualization of a nanosecond:

m.youtube.com/watch?v=9eyF...

Inspired by her, I do time of flight in a spinning disk in a microscopy lecture.

10.12.2025 02:05 — 👍 2    🔁 1    💬 0    📌 0
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Born on this day, 1906, Grace Brewster Hopper.

-Created one of the first compiler.

-Created COBOL, still in use in databases today!

-Coined the term debugging.

-Served in the U.S. Navy, reaching the rank of Rear Admiral.

🫡

10.12.2025 02:02 — 👍 4    🔁 1    💬 1    📌 0

cc @christlet.bsky.social

09.12.2025 13:34 — 👍 1    🔁 0    💬 0    📌 0
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Structured illumination dress!

The angles are slightly off, and the phase angles are missing, but I’m digging it .

09.12.2025 13:30 — 👍 7    🔁 0    💬 2    📌 0

When someone at UCSF told immigration officer that she was an Assistant Professor there, the officer said: “but you will not get tenure!”

(She did, and is quite prominent and famous in her field…)

06.12.2025 18:59 — 👍 6    🔁 0    💬 0    📌 0

I once had to explain Fourier transforms to an immigration officer.

I teach a calculus class, so I can rigorously derive the transform. Still not sure why, but since I was asked, better deliver…

06.12.2025 18:52 — 👍 4    🔁 0    💬 1    📌 0

I won the FIFA Fields medal for my geometric derivation of the offside rule.

#math #Worldcup

05.12.2025 20:43 — 👍 13    🔁 0    💬 0    📌 0

Better to follow up by e-mail or dm.

04.12.2025 14:34 — 👍 1    🔁 0    💬 0    📌 0

Please let me know if you want to grab a coffee or smth.

04.12.2025 14:30 — 👍 1    🔁 0    💬 1    📌 0

Welcome to Dallas!

How long will you be at UTSW?

04.12.2025 14:29 — 👍 1    🔁 0    💬 1    📌 0

I have that double take too, occasionally.

03.12.2025 21:06 — 👍 1    🔁 0    💬 0    📌 0

Some countries live in the future, while others cling desperately to the past.

😞

28.11.2025 22:43 — 👍 1    🔁 0    💬 0    📌 0
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Did not find what I was looking for, so tried my luck once more at the harmonic stair case.

(empty Thorlabs boxes)

28.11.2025 21:10 — 👍 6    🔁 0    💬 0    📌 0

Since Photons are bosons, the can also occupy the same quantum state (room).

Helpful if you run a Hilbert hotel.

26.11.2025 22:34 — 👍 3    🔁 0    💬 0    📌 0
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Rayleigh scattering goes Brrrr!

Sunset in DFW seen from UT Southwestern Medical Center.

25.11.2025 23:57 — 👍 10    🔁 0    💬 0    📌 0

My own theory was that it exploits the widespread innumeracy: i.e. most customers would not be able to estimate total cost including tax and meal.

25.11.2025 18:40 — 👍 0    🔁 0    💬 0    📌 0
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The disturbing history of tipping in the U.S.: "It's literally a slave wage" The practice of tipping traces its roots to European aristocracy — and took on a new life in the U.S. after the Civil War.

TIL where the U.S. tipping culture has its origin😞.

www.cbsnews.com/news/tipping...

25.11.2025 18:39 — 👍 2    🔁 0    💬 1    📌 0

Innumeracy is as much a problem as illiteracy in the U.S.

The loss of talent from countries that take math education more seriously will be hard to make up for.

24.11.2025 17:46 — 👍 2    🔁 0    💬 2    📌 0

@retof is following 20 prominent accounts