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Daniel Asarnow

@dabiophysicist

Postdoctoral scholar in Veesler Lab @ UWa. Former UCSF & SFSU & UCSC student & Exploratorium Explainer. He/him. I take tiny pictures, in 2 & 3 dimensions. https://github.com/asarnow

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Latest posts by Daniel Asarnow @dabiophysicist

PSA ๐Ÿ˜Š

06.03.2026 18:01 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

Fyi it's still recommended to get a shingles vaccine if you were vaccinated against chicken pox. It's an attenuated live virus vaccine; based on studies in younger people the risk of reactivation (shingles) is some ~7x lower compared to natural infection, but not zero.

06.03.2026 17:57 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 1

I'm waiting for the bus, bunch of kids just drove through campus in an open top Model A, bumping music, no headlights

(Actual Model A, a really fly restoration, all blue, historical plates)

06.03.2026 05:07 ๐Ÿ‘ 4 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

9 out of 53 ๐Ÿคทโ€โ™‚๏ธ

06.03.2026 04:47 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
Two Axygen MCT-150-C-S 1.5 mL tubes from the same lot. The graduations and fogged label box are bizarrely on opposite sides of either five, causing them to naturally rest either on the hinge or bill of the cap.

Two Axygen MCT-150-C-S 1.5 mL tubes from the same lot. The graduations and fogged label box are bizarrely on opposite sides of either five, causing them to naturally rest either on the hinge or bill of the cap.

There are right and left handed tubes in this bag and it's mildly disturbing ๐Ÿ˜จ

06.03.2026 01:22 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

That's how you pay the APC! Your fancy paper deserves a fancy journal, right?

05.03.2026 18:56 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Not every amino acid can be histidine, no need to take it out on proline

04.03.2026 20:30 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Don't worry, if you have the right chair and the right friends, one of them can bring a PA

(Kidding, I'm sure you'll find a new room...a new audience would be much more difficult)

03.03.2026 23:02 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
two sets of concentric circles overlapping in blue and black

two sets of concentric circles overlapping in blue and black

Wave Interference, Ink on Yupo, 2026

02.03.2026 17:43 ๐Ÿ‘ 49 ๐Ÿ” 7 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

A quick mental facility for linear interpolation

02.03.2026 17:36 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

I don't think there's anything you can *uniquely* learn from using a slide rule, although the addition/multiplication insight is actually quite important in many places (see for example, the relationship between equilibrium constants and free energy in chemistry)

02.03.2026 17:33 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Even small ones usually have scales for the "different kinds" of square and cube roots (even or odd digits: 4->2, 40->6.32455...), and some have trig functions. Larger ones have more precision, and there were helical ones packing great lengths into a relatively small cylinder - fun, right?

02.03.2026 17:33 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

I did (kid me thought they were neat). You understand logs convert between multiplication and addition a little more intuitively, and get a tactile sense for certain values, which can be useful for mental estimation

02.03.2026 17:33 ๐Ÿ‘ 3 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

4 also does the 2nd one in continued or clean context for me (memory always disabled). In both cases it's via 4.6 offering 4 in response to the flag however

01.03.2026 04:40 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

That makes sense, I was surprised at first decoding rot13 was so facile but in retrospect should not have been

01.03.2026 04:36 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

But only Sonnet 4.6, Sonnet 4 correctly interpreted the message and replied normally to the prompt. Is it an example from somewhere?

01.03.2026 04:10 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

Good points, I'd add that the visualization makes it difficult to assess the true density of responses, because there are a lot of points on top of each other. It may be that a large majority of responses are actually near Iran - a contour plot based on a density estimator would be clearer IMO

01.03.2026 00:22 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
A whiteboard in an academic lab, with a years-old message left by a former student.

Computer Lab Rules:
NO OVERFITTING!

A whiteboard in an academic lab, with a years-old message left by a former student. Computer Lab Rules: NO OVERFITTING!

Good to see the PhD lab is still following the rules

26.02.2026 22:53 ๐Ÿ‘ 8 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

I know how you feel! Keep pushing (or push advisor to push). At a certain point the editor needs to decide or you must go elsewhere...

25.02.2026 18:41 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
ChimeraX screenshot showing CubeNTube plugin.

ChimeraX screenshot showing CubeNTube plugin.

The new ChimeraX CubeNTube plugin allows erasing parts of maps using cube, cylinder, and custom shapes and has undo. Created by Tamino Cairoli. Available from ChimeraX menu Tools / More Tools....

24.02.2026 19:55 ๐Ÿ‘ 69 ๐Ÿ” 18 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 1

This is me not reposting Videodrome

24.02.2026 08:02 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Share a movie you incorrectly think no one else remembers ๐Ÿ˜‡

24.02.2026 08:01 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
Original artworks by local artist Obi Kaufmann to be featured in ad spaces at BART stations | Bay Area Rapid Transit

This series by Obi Kaufmann. Higher quality images are available, but without the brick.

23.02.2026 20:50 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
Another illustrated poster on the brick wall of the BART station. This one depicts Mt. Diablo, revered by the Ohlone as the center of creation, therefore slandered by missionaries. Also featured are several large, native avian predators.

Another illustrated poster on the brick wall of the BART station. This one depicts Mt. Diablo, revered by the Ohlone as the center of creation, therefore slandered by missionaries. Also featured are several large, native avian predators.

A third artistic poster at BART. The Edwards wildlife refuge, with native fish, birds, insects, lizard and snake illustrated.

A third artistic poster at BART. The Edwards wildlife refuge, with native fish, birds, insects, lizard and snake illustrated.

I try to collect new ones when I'm home.

23.02.2026 20:50 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
BART station poster depicting the city roughly as seen from the shipping channel, South of the bridge and West of Yerba Buena, with illustrations of several native animals (bat, egret, coyote, river otter, raptor).

BART station poster depicting the city roughly as seen from the shipping channel, South of the bridge and West of Yerba Buena, with illustrations of several native animals (bat, egret, coyote, river otter, raptor).

I really like these

23.02.2026 20:33 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

New experimental data is the bottleneck in virtually all research areas, so "collecting data" also needs to be in there, maybe at 0. At the moment, we don't have liquid handlers that work without human supervision - or even label makers that consistently outcompete permanent marker

23.02.2026 20:24 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Plot twist, the commits were blank

23.02.2026 18:12 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Not just the headline

23.02.2026 18:07 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Did you ever read this?
www.salon.com/2002/08/28/0...

22.02.2026 09:00 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

What speaks all languages,
but has no voice?
Would be silent,
but has no choice?

As old as the air,
it spoke only when we did.

22.02.2026 08:39 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0