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David Rousseau

@dhpmrou.bsky.social

Particle Physicist at IJCLab-Orsay, ATLAS experiment at CERN. Higgs Boson and AI. #ML competitions and open datasets Higgsml, TrackML, and now Fair Universe Higgsml Uncertainties #ai4science

752 Followers  |  1,069 Following  |  190 Posts  |  Joined: 10.10.2023
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Posts by David Rousseau (@dhpmrou.bsky.social)

Yes but my gripe is that this is the one which was chosen for the olympics, to be compared to Olympic triathlon which is a ~2 hour effort.

27.02.2026 22:09 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

This ski-mountaineering event at the #winterOlympics #olympics is completely ridiculous.
These athletes have insane fitness, but it all comes down to how fast they can put on/take off their gear and handle their equipment.
Fine for a 2-hour triathlon, but for a 3-minute event? Come on.

19.02.2026 13:29 β€” πŸ‘ 2    πŸ” 1    πŸ’¬ 1    πŸ“Œ 0

What’s great since the advent of LLMs is that now when I write a review, I don’t bother polishing my style, on the contrary, to show that this is 100% homemade, handcrafted review, folks.
Like leaving a few lumps in the mashed potatoes
#academiclife

19.02.2026 09:36 β€” πŸ‘ 3    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Aha, to the gallon !! Glad you made it work…

27.01.2026 06:13 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Can’t wait for predatory journals to start using AI seriously.

I’m so done being invited to resubmit my "AI for Particle Physics" paper to the "Journal of Advances in Civil and Mechanical Engineering"

#AcademicLife

23.01.2026 10:21 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Note that the paper is about applicants, only some will be successful and they will be very welcome, but it is a tiny fraction of what would be needed to compensate the loss

21.01.2026 14:07 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

No they are not. Already not enough positions for the talented who graduated here

21.01.2026 00:47 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
Preview
(PDF) Post-fledging habitat selection of a Purple Heron Ardea purpurea revealed by GPS/GSM telemetry PDF | The Purple Heron is a species of conservation concern in Europe, mainly threatened by the progressive degradation and reduction of wetlands. For... | Find, read and cite all the research you nee...

Ah it might be a data artefact, as if the location is sent much less frequently at some point.
Just found this paper, from this author, which seems to be for this study (this is really not my area of expertise)

www.researchgate.net/publication/...

08.01.2026 21:57 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

βš›οΈ @kylecranmer.bsky.social , have you seen this brewing ?

08.01.2026 17:29 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
Preview
Resummation of the C-Parameter Sudakov Shoulder Using Effective Field Theory The C-parameter distribution in $e^+e^-$ annihilation exhibits a kinematic shoulder at $C = 3/4$, where three-parton final states reach their maximum and a fourth parton is required to exceed it. This...

arxiv.org/abs/2601.02484

Yes, it's that Schwartz -- QFT textbook author -- writing a paper wherein "All calculations, numerical analysis, and manuscript preparation were performed by Claude, an AI assistant developed by Anthropic, working under physicist supervision."

08.01.2026 04:21 β€” πŸ‘ 6    πŸ” 2    πŸ’¬ 1    πŸ“Œ 1
Map of Africa and Europe, with purple dots mapping the migration  trajectories of purple herons over serveral year. Beppe's trajectory is dark blue.

Map of Africa and Europe, with purple dots mapping the migration trajectories of purple herons over serveral year. Beppe's trajectory is dark blue.

Incredible !
I see that there is no data beyond data 2024. What are they up to ?

08.01.2026 13:31 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

My phantom bird, seen only once many years ago in Marais Poitevin, west of France. It is not really rare in France but rather elusive.
And so many grey herons of similar size and silhouette and even pattern if far away

07.01.2026 23:10 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Sounds like a crazy idea, but I was almost convinced after reading the full post.

07.01.2026 05:37 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

This πŸ‘‡ !!!

02.01.2026 23:26 β€” πŸ‘ 4    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

2025 France Lifer tally: 5 this year, bringing me to 289.
Four mentioned above, plus Wood Warbler in Fontainebleau Forest.
300 is in reach!

7/7

01.01.2026 17:54 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Top 1 2025 #birds
Little Bustard at last!
Distant views, rain pouring, but after 20–30 years of hoping, I finally got it.
The longer the search, the greater the joy of the tick, of course
bsky.app/profile/dhpm...

6/7

01.01.2026 17:54 β€” πŸ‘ 3    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Top 2 2025 #birds
The double lifer in 15 minutes!
One on a tip‑off (White‑winged Tern), the second self‑found (Grey Phalarope).
bsky.app/profile/dhpm...

5/7

01.01.2026 17:54 β€” πŸ‘ 4    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Top 3 2025 #birds
Exceptional morning of the four european harriers, even if none was a lifer

bsky.app/profile/dhpm...

4/7

01.01.2026 17:54 β€” πŸ‘ 4    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Top 4 2025 #birds
Horned Larks on Île Madame.
Typically, only a handful are seen in France wintering on the northern dunes, but last winter a pair was exceptionally recorded south in Charente‑Maritime. I could easily find them

bsky.app/profile/davi...

3/7

01.01.2026 17:54 β€” πŸ‘ 5    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Top 5 2025 #birds
Watching a pair of Eurasian Golden Orioles chase each other just meters away, the male’s vibrant yellow and the female’s rich green.
Often heard in summer, rarely glimpsed in dense foliage, but this was a full-on show!
2/7

01.01.2026 17:54 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
A map of France localising bird ticks for 2025, with a patch around Essonne and another one around Deux-Sèvres

A map of France localising bird ticks for 2025, with a patch around Essonne and another one around Deux-Sèvres

#Birding2025 Recap 181 species, my 2nd best year since 2014, even without trips to Brittany, Provence, Jura, or Corsica!
Made the most of local patches and Niort (my home town)
A few puzzling misses: Fieldfare and Red Kite.
Highlights of the year:
#birds
1/7

01.01.2026 17:54 β€” πŸ‘ 5    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Yes sure, you can do it in chain one a day, or 8 x 125 at a time, however you want.
But it is a living thing, it can go bad unexpectedly

30.12.2025 20:00 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
A strange looking yoghurt

A strange looking yoghurt

Farewell, little #viili, gone too soon.

After a month, I took it on a trip. Not sure what happened, it turned split and sour, but apparently that’s a common fate.

No worries, I’ll just start again from scratch.

30.12.2025 17:11 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
Video thumbnail

Superb #viili made with RΓ©volution Fermentation cultures!

(Plus a bit of goat-cheese Geotrichum for that β€œskin”)

A Finnish yogurt that ferments at room temperature in 24 hours.

Delicious on its own, with honey, muesli, or fresh fruit.

1/2

30.12.2025 17:11 β€” πŸ‘ 2    πŸ” 1    πŸ’¬ 1    πŸ“Œ 0

bsky.app/profile/dhpm...

30.12.2025 14:00 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

An interesting exercise :Alice and Bob, two HEP experimentalists, same age, both on large collider exp.
Alice’s expertise is on detector dΓ©veloppement, she leaves when experiment starts taking data, when Bob hops in, as he is an analyser.
Alice’s pub record is at least 10 times less than Bob’s.

28.12.2025 21:16 β€” πŸ‘ 3    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

C’est un pic, c’est un cap, c’est une pΓ©ninsule !

28.12.2025 21:10 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

It is also BS atmosphere which is anti-AI but specifically anti-LLM, while the non LLM science crowd is not very active here. Still on X I guess.

28.12.2025 21:01 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

buttons coming back, shitty door handles slowly being made illegal, now just make cars small again and we’ll be getting somewhere

28.12.2025 08:11 β€” πŸ‘ 381    πŸ” 49    πŸ’¬ 2    πŸ“Œ 0

I'm fascinated by this specific point, NO of USA, where North Two Oceans creek splits, one branch flowing to the Pacific and the other one to the Atlantic.
Lewis and Clark did not pass far from there.

25.12.2025 09:28 β€” πŸ‘ 6    πŸ” 0    πŸ’¬ 2    πŸ“Œ 1