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Jan Trnka

@jantrnka.bsky.social
1.8K followers 925 following 3K posts

Scientist, teacher, wanderer, musician. Cancer metabolism, mitochondria, Bayesian #rstats at Charles University. ORCID orcid.org/0000-0002-1786-7562 Lectures www.youtube.com/@jantrnka227 Music severninastupiste.bandcamp.com

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Jan Trnka @jantrnka.bsky.social · 2h
And…there may not be actually any treasure there.
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noam @noamchompers.bsky.social · 15h
philosophical expertise is more like knowing the lay of the land than like knowing where the treasure is buried. that's partly why people are often disdainful of it. 'look i can wander around too'. you can, but you're also hacking through a notoriously dense thicket thinking you're making progress
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ae @aelkus.bsky.social · 4h
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Jan Trnka @jantrnka.bsky.social · 16h
Well, thanks for reminding me…
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Richard McElreath 🐈‍⬛ @rmcelreath.bsky.social · 12/10/2026
"In a just world, every article about GPT-4 would nod toward Barthes and Foucault." Downing spoonfuls of mayonnaise as I read Ted's essay, because it is too spicy (link in quote below)
In a just world, every article about GPT-4 would nod toward Barthes and Foucault. But if our world is just at all, its justice is of the ironic kind that only declares a winner after the race has been forgotten. The models that dramatize twentieth-century cultural theory are aligned now with institutions that twenty-first-century theorists distrust. This makes it hard for anyone to take a victory lap. People who once nodded along with the last words of The Order of Things (1966) (“man would be erased, like a face drawn in sand at the edge of the sea”) may now feel that Foucault’s early critique of humanism needs nuance.
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pierre hibšman @pierrehibsman.bsky.social · 23h
Za devět dní slavíme deset let hraní v Akropoli, osobně mám radši koncerty ve křovích, ale i tohle snad bude hezký! Vzácnou návštěvou nám bude Dagmar Voňková. Zveme uctivě.
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Jan Trnka @jantrnka.bsky.social · 11/10/2026
Bojím se bojím.
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Jan Trnka @jantrnka.bsky.social · 11/10/2026
A few hundred years younger and with more Byzantine and Arab influences. But yeah, medieval splendor.
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Jan Trnka @jantrnka.bsky.social · 11/10/2026
Bílý král* jako “salutis Africae optima spes” - nejlepší naděje na spásu Afriky… (*Felipe V.)
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Jan Trnka @jantrnka.bsky.social · 11/10/2026
The Norman-Arab-Byzantine Capella Palatina of Roger II in Palermo. Sistine chapel-level stunning!
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Jan Trnka @jantrnka.bsky.social · 11/10/2026
Bojím se té druhé možnosti…
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Jan Trnka @jantrnka.bsky.social · 10/10/2026
Číst tyhle knížky je fajn, protože si člověk uvědomí, že svět byl už dávno v minulosti velmi propojený, lidé, věci, myšlenky (i patogeny) se víceméně volně pohybovali na velké vzdálenosti a Evropa po většinu historie nebyla ani ve druhé lize.
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Jake Grumbach @jakemgrumbach.bsky.social · 09/10/2026
New working paper: the Norwegian wealth tax was a huge success. The "exodus" of wealthy people never happened (less than 100 individuals left). Tax revenue increased by 71.5%. No changes in business activity or investment. www.nber.org/papers/w35854
Taxing Entrepreneurial Wealth: Evidence from
Norway, 2021-2025
Marius A. K. Ring
WORKING PAPER 35854|
DOl 10.3386/w35854
ISSUE DATE October 2026
Whether imposing higher taxes on business owners adversely affects business activity by constraining investment and inducing capitalist flight is a central question in the ongoing debate on how to tax the ultra wealthy. To shed new light, I exploit a series of related Norwegian reforms during 2021-2024 that increased dividend tax rates, removed migration-related capital gains tax loopholes, and nearly doubled the effective marginal tax rate on business wealth. These reforms spurred international debate and, allegedly, an "exodus" of Norwegian billionaires (Financial Times,
2023). While I document clear effects on migration, these responses are concentrated among the top 0.1% of the wealth distribution and mostly confined to 2022 and 2023. My results indicate that at most 100 individuals left due to the reforms. I find no evidence of significant outmigration or reduced inflows of startup founders or inventors. I estimate that absent any outmigration, wealth tax revenues would have increased by 75% from 2021 to 2024. Reform-driven outmigration lowers the revenue gain to 71.5%. My findings further show that outmigrating owners' firms remain economically active and do not reduce investment. In a broader set of analyses, I examine whether business outcomes are affected, regardless of whether owners outmigrate, since firms may reduce investment both due to liquidity constraints or distortions to owners' savings decisions. I compare firms owned by Norwegian individuals subject to the wealth tax with firms owned by foreigners and other tax-exempt entities. By merging historical ownership data from Orbis with the Norwegian shareholder register, I perform these analyses on both Norwegian and foreign-domiciled firms.
Across settings, I find no evidence that Norwegian-owned firms pay out more dividends or invest less after the reforms,…
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Jan Trnka @jantrnka.bsky.social · 10/10/2026
Problém tohohle typu volebních map je, že vypadají, jako by hlasoval (prázdný) prostor. A tím jsou často velmi zavádějící.
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Michael Friendly @datavisfriendly.bsky.social · 10/10/2026
📊🗺️#datavis #maps worldmapper.org has an amazing collection of anamorphic cartograms with size of countries mapped to some variable of interest. This one, on the outbreak of COVID is one of my favorites, animating the change over time. Watch it spread
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Carl T. Bergstrom @carlbergstrom.com · 10/10/2026
go home google you're drunk
Google autocompletes "plato socrate gorgias" with "beer"
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Ruth Ben-Ghiat @ruthbenghiat.bsky.social · 10/10/2026
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Fakta o klimatu @faktaoklimatu.cz · 08/10/2026
We are happy to introduce the English version of the Atlas of Climate Change. It is available globally. „We can argue about the solutions, but we need to start from the same facts." That is why we want the Atlas to be a communication anchor people can return to. atlasofclimatechange.org
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Jan Trnka @jantrnka.bsky.social · 08/10/2026
“Pretty depressing news, in my opinion. The only future i see now for human math is a slow death. Lets only hope humanity itself fares better…”
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Martin Enserink @martinenserink.bsky.social · 07/10/2026
I asked plague scientists in France, the U.K. and the U.S. what they make of the death of a lab technician in Siberian. (Spoiler: There's absolutely no reason to worry about a plague epidemic.) www.science.org/content/arti... @science.org
science.org
Possible plague death at a Siberian lab baffles scientists
Much is unclear about the tragedy, but plague researchers say there is “zero” chance of an epidemic
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Jan Trnka @jantrnka.bsky.social · 08/10/2026
If only it could be treated with code…
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Jan Trnka @jantrnka.bsky.social · 07/10/2026
A otrokářské Česko v ní hraje konečně významnou roli....:-)
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M @howdoesitsound.bsky.social · 06/10/2026
Dnes v Knihovně syntezátorů - další poslechová setkání "Listening to..." Tentokrát se zaměříme na příběh Sandy Stone, zvukové inženýrky, umělkyně a akademičky, která mimo jiné položila základy transgender studies. Diskutovat budeme také o přínosu transgender žen v oblasti hudebních technologií.
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Elizabeth Anne, PhD @lacksauthority.bsky.social · 05/10/2026
never the wrong time for this classic
Screenshot of a tweet by @RobbtKraft reading “scientist: "does everyone here know what Watson and Crick discovered?" 
me from back of room: "Rosalind Franklin's notes"”
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Darren Dahly @statsepi.bsky.social · 06/10/2026
They hounded Aaron Swartz to death for downloading papers from jstor but society is now supposed to just accept mass theft because this thing can write that TPS report *for* you. en.wikipedia.org/wiki/Aaron_S...
en.wikipedia.org
Aaron Swartz - Wikipedia
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Jan Trnka @jantrnka.bsky.social · 05/10/2026
Jeden z hlavních důvodů, proč je pro mě Bluesky víceméně plnohodnotná náhrada Twitteru.
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Ted Underwood @tedunderwood.com · 05/10/2026
Lots of gratitude to @carlbergstrom.com for quoting probably my favorite of my own sentences about AI at @arl.org
Carl Bergstrom stands onstage at an Association of Research Libraries meeting, beside large projection screens displaying a quotation from Ted Underwood: “As in any fairytale, accepting magical assistance comes with risks.” Underwood’s name and University of Illinois affiliation appear beneath the quotation. The ballroom is dark, with blue accent lighting on the ceiling and stage curtains; a lectern and conference signage stand near Bergstrom, and the main slide fills most of the left side of the image. The quotation comes from Underwood’s essay “Will AI make us overconfident?” at tedunderwood.com.
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Vladimir Salnikov @v4ldelund.bsky.social · 05/10/2026
Sam Altman be like :
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Philip Oldfield @sustainabletall.bsky.social · 05/10/2026
Three storeys of lightweight timber structure added on top of 16th Century load-bearing townhouses in Linz, Austria Retains the historic building, increases density and reduces embodied carbon - triple win! By mia2 Architektur
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Jan Trnka @jantrnka.bsky.social · 05/10/2026
Je to tak. A snad kromě Zelených s tím kandidující strany nechtějí dělat nic nebo jen (ve srovnání s Paříží) docela málo.
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Jan Trnka @jantrnka.bsky.social · 04/10/2026
The best thing about a chromatic accordion has been replicated for the piano! (a hundred and fifty years ago...)
youtube.com
I Switched to the Jankó Piano for a Year – Here’s What Happened
YouTube video by Glitchnator
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Jan Trnka @jantrnka.bsky.social · 03/10/2026
I'd miss the stories of Prague streets, hope you will reconsider. I find there is quite a bit of non-US stuff on here, lots of German, UK and French at least. Very little Czech, that's definitely true.
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Carl T. Bergstrom @carlbergstrom.com · 03/10/2026
I have absolutely wondered about this. Amazing.
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Jan Trnka @jantrnka.bsky.social · 02/10/2026
Yes, pls.
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Jan Trnka @jantrnka.bsky.social · 02/10/2026
Ta mě asi minula!
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Jan Trnka @jantrnka.bsky.social · 02/10/2026
A very interesting and somewhat scary* video… *the end of fossil fuels is certainly a good thing but this way it will likely cause a lot of disruption and suffering
youtu.be
The oil apocalypse is here
YouTube video by Max Fisher
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Jiří Štěpán @siderorea.bsky.social · 02/10/2026
Dnes opět můžete nacpat své peníze muzikantům a labelům, protože je #BandcampFriday. Pořád si myslím, že za to stojí třeba naše deska s Jakubem Šimanským. Tenkrát nahraná čistě z potřeby zahrát si spolu – že u toho byly i mikrofony, se stalo spíš navíc. stoned-to-death.bandcamp.com/album/z-druh...
stoned-to-death.bandcamp.com
Z Druhé Strany, by Šimanský Štěpán
9 track album
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Jan Trnka @jantrnka.bsky.social · 02/10/2026
Věčný návrat VH.
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Aran Epochal @aranepochal.bsky.social · 02/10/2026
Pod zastitou instituce jmenem #BandcampFriday vas naprosto bezostysne zkousim stahnout o 100 Kc do svy kasy. aransatan.bandcamp.com/album/konspi...
aransatan.bandcamp.com
Konspirace, by Aran Satan
12 track album
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BeijingPalmer @beijingpalmer.bsky.social · 02/10/2026
this would be an incredible film if you started it with all the normal serial killer hunting tropes
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Jan Trnka @jantrnka.bsky.social · 01/10/2026
No, co ti budu...:-)
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Jan Trnka @jantrnka.bsky.social · 01/10/2026
Uf, to je teda problém...
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Jan Trnka @jantrnka.bsky.social · 01/10/2026
To by mě měli rovnou za šílence.
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Jan Trnka @jantrnka.bsky.social · 01/10/2026
Fascinuje mě, když jsou lidi překvapení, že jsem někam (po Praze) přijel MHD a ne autem. “To je takové neobvyklé, ne?”, padlo dnes. Wtf, lidi?!
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Vaclav Walach @vwalach.bsky.social · 30/09/2026
Rozmohl se nám takový nešvar: říkat nesmysly o regulovaném nájemném. A tím nemyslím ono triumfální, ale velmi hloupé tvrzení, že jde o “nejefektivnější techniku ničení měst”. Myslím tím všeobecný odpor vůči tomuto důležitému nástroji dostupného bydlení. Naštěstí jsou stále častěji slyšet jiné hlasy.
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Brian G. aka urbanbohemian 🪩🥂💖 @urbanbohemian.com · 30/09/2026
We're on Bluesky, put the link in your post. Put the link in your post. Put. The. Link. In. Your. Post. Links in posts aren't buried or de-prioritized here. This is one of the last platforms you don't have to make interested users do detective work to find the link. Just put it in the post.
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Jan Trnka @jantrnka.bsky.social · 30/09/2026
Maparan.
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Ian Coldwater 🧊🚫 @lookitup.baby · 30/09/2026
BREAKING NEWS: “Do geese see God” is a palindrome
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Jan Trnka @jantrnka.bsky.social · 30/09/2026
Covid + chřipka naočkovány. Doporučuju!
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Tadzio Mueller @tadziomueller.bsky.social · 30/09/2026
#Collapse news: "A record-breaking 23 zettajoules of heat was sunk into the world’s seas last year, leaving ocean waters hotter, higher & less hospitable. The explosive addition of thermal energ comes amid far-reaching changes to the deep water bodies..."
theguardian.com
World’s seas heated by a record 23 zettajoules last year
The injection of thermal energy, 40 times that used by humanity in total, comes amid an increasing rise in sea levels and continuing acidification
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