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Stephane Deny

@stphtphsn.bsky.social
351 followers 774 following 39 posts

Assistant Professor at Aalto. Neuro - ML scholar.google.com/citations?hl=fr&…

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Stephane Deny @stphtphsn.bsky.social · 18/12/2025
New preprint! "A Deep Learning Model of Mental Rotation Informed by Interactive VR Experiments" 🔗 arxiv.org/abs/2512.13517 by Raymond Khazoum, Daniela Fernandes, Aleksandr Krylov, Qin Li and myself
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Stephane Deny @stphtphsn.bsky.social · 08/11/2025
@jaakkolehtinen.bsky.social
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Stephane Deny @stphtphsn.bsky.social · 08/11/2025
@csaalto.bsky.social
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Stephane Deny @stphtphsn.bsky.social · 08/11/2025
First blog post of the series explaining our motivation here: bsky.app/profile/stph...
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Stephane Deny @stphtphsn.bsky.social · 08/11/2025
🔥 Technical blog post (with maths and code) on how to render 4D objects, by Raihan Gafur 🔥 🔗 raihanthecooldude.com/spaceland-ep...
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Olivier Marre @oliviermarre.bsky.social · 25/10/2025
Happy to share my first work with a connection to myopia, a collaboration with EssilorLuxottica www.science.org/doi/10.1126/...
science.org
Nonlinear spatial integration allows the retina to detect the sign of defocus in natural scenes
The retina can easily detect whether the eye is too small or too big thanks to the imperfections of the eye optics.
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Tahereh Toosi @taherehtoosi.bsky.social · 24/10/2025
How does our brain excel at complex object recognition, yet get fooled by simple illusory contours? What unifying principle governs all Gestalt laws of perceptual organization? We may have an answer: integration of learned priors through feedback. New paper with @kenmiller.bsky.social! 🧵
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Stephane Deny @stphtphsn.bsky.social · 16/10/2025
@neurograce.bsky.social, @kamdh.bsky.social @csaalto.bsky.social, @aalto.fi
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Stephane Deny @stphtphsn.bsky.social · 16/10/2025
🔥 "The Perception and Learning of 4D Object Geometry in Humans and Machines" 🔥 Master thesis work by Raihan Gafur. Check out his awesome blog post series! raihanthecooldude.com/spaceland-ep...
raihanthecooldude.com
Spaceland – Ep. 01 – When the Brain Meets the Fourth Dimension: Exploring Mental Rotation in 4D Objects – Raihan Gafur
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Stephane Deny @stphtphsn.bsky.social · 15/10/2025
Arturo Deza had this work (arxiv.org/abs/2203.06649), but if I understand well is the kind of model you are not looking for. But Arturo may have good answers to your question.
arxiv.org
Joint rotational invariance and adversarial training of a dual-stream Transformer yields state of the art Brain-Score for Area V4
Modern high-scoring models of vision in the brain score competition do not stem from Vision Transformers. However, in this paper, we provide evidence against the unexpected trend of Vision Transformer...
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Yipeng Li @moonliyp.bsky.social · 11/05/2025
(1/6) Thrilled to share our triple-N dataset (Non-human Primate Neural Responses to Natural Scenes)! It captures thousands of high-level visual neuron responses in macaques to natural scenes using #Neuropixels.
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Jonathan Kadmon @kadmonj.bsky.social · 23/03/2025
(1/6) Excited to share a new preprint from our lab! Can large, deep nonlinear neural networks trained with indirect, low-dimensional error signals compete with full-fledged backpropagation? Tl;dr: Yes! arxiv.org/abs/2502.20580.
arxiv.org
Training Large Neural Networks With Low-Dimensional Error Feedback
Training deep neural networks typically relies on backpropagating high dimensional error signals a computationally intensive process with little evidence supporting its implementation in the brain. Ho...
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Dan Goodman @neural-reckoning.org · 18/03/2025
This is great stuff!
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TMLR Published Papers @tmlr-pub.bsky.social · 13/02/2025
A comparison between humans and AI at recognizing objects in unusual poses Netta Ollikka, Amro Kamal Mohamed Abbas, Andrea Perin, Markku Kilpeläinen, Stephane Deny Action editor: Andrew Lampinen openreview.net/forum?id=yzbAFf8vd5 #poses #recognition #recognizing
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Stephane Deny @stphtphsn.bsky.social · 19/02/2025
this would be a more apt analogy if the pilots (politicians) were piloting the planes remotely from land (politicians can be corrupt and rarely bare the consequences of their policies) and if common sense was of no relevance in politics (it is).
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Stephane Deny @stphtphsn.bsky.social · 09/02/2025
hmm, thanks gpt, that's very clear now what a MRAC is
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Stephane Deny @stphtphsn.bsky.social · 27/01/2025
new edito by N Arthaud, new banger: x.com/n_arthaud/st...
x.com
x.com
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Stephane Deny @stphtphsn.bsky.social · 20/01/2025
Le discours de gauche existe toujours, mais ce n'est chez les democrates americains / macronistes qu'on le trouve, et étonamment cette gauche la n'a pas quitté twitter, peut-etre justement car les classes populaires y sont mieux representee? x.com/n_arthaud/st...
x.com
x.com
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Stephane Deny @stphtphsn.bsky.social · 16/01/2025
My work routine summarized in two words: "2fac authentication". Thanks Microsoft 💀
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Stephane Deny @stphtphsn.bsky.social · 14/01/2025
New Preprint: "On the Ability of Deep Networks to Learn Symmetries from Data: A Neural Kernel Theory" by Andrea Perin and myself. Retweets of this post or the thread below are highly appreciated! Follow @zazzarazzaz.bsky.social for future updates on this line of work.
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Stephane Deny @stphtphsn.bsky.social · 15/01/2025
😆
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Stephane Deny @stphtphsn.bsky.social · 14/01/2025
I agree with all said. I think the degree of control a mentor will want to exert on mentee also depends on the pressures the mentor receive to deliver (eg CV for grants / deadline for graduations / required number of publications). There is so much leeway one can have.
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Stephane Deny @stphtphsn.bsky.social · 14/01/2025
which journal? noteworthy information
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Kameron Decker Harris @kamdh.bsky.social · 14/01/2025
Interesting work on symmetries and learning!
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Friedemann Zenke @fzenke.bsky.social · 14/01/2025
Now published in @elife.bsky.social doi.org/10.7554/eLif... a fun collaboration with @clairemb90.bsky.social and Rainer Friedrich
doi.org
Geometry and dynamics of representations in a precisely balanced memory network related to olfactory cortex
Computational modeling revealed that balanced assemblies of excitatory and inhibitory neurons shape representational manifolds in olfactory cortex-like recurrent networks, resulting in joint maps of s...
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Thùy Vy T Nguyễn @thuyvytnguyen.bsky.social · 14/01/2025
I did my PhD with Ed Deci, who usually says very few words. In our meetings, it was his reserved nature that gradually allowed me to come out of my shell, be my own person. That experience teaches me one valuable lesson now that I mentor others: know when to shut up.
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Stephane Deny @stphtphsn.bsky.social · 14/01/2025
interesting! do you think there is a balance to find, for instance if the student seems to be taking too much risk in a project
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Stephane Deny @stphtphsn.bsky.social · 14/01/2025
Thanks Kameron, means a lot coming from you! Hope you enjoy the work which is certainly a product of slow science : )
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Stephane Deny @stphtphsn.bsky.social · 14/01/2025
New Preprint: "On the Ability of Deep Networks to Learn Symmetries from Data: A Neural Kernel Theory" by Andrea Perin and myself. Retweets of this post or the thread below are highly appreciated! Follow @zazzarazzaz.bsky.social for future updates on this line of work.
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Stephane Deny @stphtphsn.bsky.social · 14/01/2025
I would like to be added is possible. Many thanks!
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Andrea Perin @zazzarazzaz.bsky.social · 14/01/2025
Little is known about how deep networks interact with structure in data. An important aspect of this structure is symmetry (e.g., pose transformations). Here, we (w/ @stphtphsn.bsky.social) study the generalization ability of deep networks on symmetric datasets: arxiv.org/abs/2412.11521 (1/n)
arxiv.org
On the Ability of Deep Networks to Learn Symmetries from Data: A Neural Kernel Theory
Symmetries (transformations by group actions) are present in many datasets, and leveraging them holds significant promise for improving predictions in machine learning. In this work, we aim to underst...
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Guillaume Bellec @bellecguill.bsky.social · 08/01/2025
Pre-print 🧠🧪 Is mechanism modeling dead in the AI era? ML models trained to predict neural activity fail to generalize to unseen opto perturbations. But mechanism modeling can solve that. We say "perturbation testing" is the right way to evaluate mechanisms in data-constrained models 1/8
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Stephane Deny @stphtphsn.bsky.social · 05/01/2025
Should text be also readable without looking at the figures? the back and forth is sometimes annoying I feel.
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Mark D Humphries @markdhumphries.bsky.social · 30/12/2024
Cutting it a bit fine, but here’s my review of the year in neuroscience for 2024 The eighth of these, would you believe? We’ve got dark neurons, tiny monkeys, the most complete brain wiring diagram ever constructed, and much more… Published on The Spike Enjoy! medium.com/the-spike/20...
medium.com
2024: A Review of the Year in Neuroscience
Feeling a bit wired
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Stephane Deny @stphtphsn.bsky.social · 17/12/2024
count me in plz. I was in paris, a long time ago 🙏
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Stephane Deny @stphtphsn.bsky.social · 16/12/2024
why?
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Tomer Ullman @tomerullman.bsky.social · 01/12/2024
thinking of calling this "The Illusion Illusion" (more examples below)
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Eero Simoncelli @eerosim.bsky.social · 26/11/2024
The Center for Neural Science at NYU is aiming to add another computational neuroscientist to our community: apply.interfolio.com/157767 Come join us! Deadline 31 Dec 2024
apply.interfolio.com
Apply - Interfolio {{$ctrl.$state.data.pageTitle}} - Apply - Interfolio
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Stephane Deny @stphtphsn.bsky.social · 24/11/2024
it's never the last though
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Stephane Deny @stphtphsn.bsky.social · 23/11/2024
Not really, I think it is a distorted view to think that people work with a goal and no constraints on honesty ethics etc.. All too common but distorted. Now some people might act like that and be very "successful".
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Stephane Deny @stphtphsn.bsky.social · 23/11/2024
nah actually just verified and it's just a mess in my head. "Notoire" is a fact known by many people, "notable" means well-respected, two different words
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Stephane Deny @stphtphsn.bsky.social · 23/11/2024
ah sorry it's a false friend (meaning in french is very close to famous)
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Stephane Deny @stphtphsn.bsky.social · 23/11/2024
Let's see... for one thing I am not an AI agent trained with RL to achieve the sole goal of being the most notorious scientist by all means including being dishonest and hiding the work of other deliberately?
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Stephane Deny @stphtphsn.bsky.social · 23/11/2024
hmmm, I don't know. Sorry for wasting your time 😀
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Stephane Deny @stphtphsn.bsky.social · 23/11/2024
OK well in theory, if you "know" that it is intentional, and that the intention is to hide the prior work deliberately to make their contribution seem bigger than it is, I'd say they are being dishonest. Wait, what was the question now?!
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Stephane Deny @stphtphsn.bsky.social · 23/11/2024
Wait, how could you possibly know that they did not forget about this interaction, or forget to place the citation in the final version of the manuscript? I have found many times that interactions that seemed very meaningful to me were forgotten by the other party completely : )
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Stephane Deny @stphtphsn.bsky.social · 23/11/2024
Benefit of the doubt, and if the itching is strong send friendly email before concluding anything. Many failure points: they forgot, the writer of the biblio part was not the person you talked to, they misread your work, they misunderstood it, they forgot (did I mention it already?), etc...
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Stephane Deny @stphtphsn.bsky.social · 22/10/2024
fair enough : )
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Stephane Deny @stphtphsn.bsky.social · 22/10/2024
Tbh, I don't think any of this is physics 😂 Physics is defined by an object of study: natural phenomena. Are these algorithms natural phenomena? Seems like maths to me.
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