Sign in

Umberto Picchini

@upicchini.bsky.social
1.5K followers 210 following 80 posts

Full Professor at @deptmathgothenburg.bsky.social | simulation-based inference | Bayes | stochastic dynamical systems | umbertopicchini.github.io

PostsRepliesMedia
Reposted by Umberto Picchini
arXiv @arxiv.bsky.social · 01/10/2026
arXiv has updated our policy on rate limiting for all submitters. This update was made to fairly distribute moderator time & support the arXiv community of staff, volunteers, readers & authors. Please read our announcement to learn more: blog.arxiv.org/2026/10/01/updated-r…
216874
Umberto Picchini @upicchini.bsky.social · 29/08/2026
These days I only use emails with coworkers. So it is the university email system. Social media messaging has replaced my communication with friends
000
Umberto Picchini @upicchini.bsky.social · 28/08/2026
Hmmm, i never received any such separate email
100
Umberto Picchini @upicchini.bsky.social · 09/06/2026
you can PM me for more info and questions. [4/4]
010
Umberto Picchini @upicchini.bsky.social · 09/06/2026
Manuscripts will undergo METRON’s standard double-blind review process. When submitting, after June 20, select “CIBB2026” as the article type. Deadline to submit: January 31, 2027, Expected acceptance: August 31, 2027 Expected publication: September–October 2027, [3/4]
110
Umberto Picchini @upicchini.bsky.social · 09/06/2026
We welcome original research and review articles on theoretical, methodological, and applied advances in biostatistics and health data science. Topics include Bayesian inference, causal inference, clinical trials, epidemiology, machine learning, public health, survival analysis, and more [2/4]
130
Umberto Picchini @upicchini.bsky.social · 09/06/2026
📢 Call for papers The journal METRON is soon welcoming submissions for the Special Issue "Modern Biostatistics and Health Data Science" www.springer.com/statistics/j... Associated with CIBB 2026, Rome, Italy, Sept 2–4. Submissions are also welcome from authors not attending the conference. [1/4]
121
Umberto Picchini @upicchini.bsky.social · 03/06/2026
Useful taxonomy of pairwise Markov models, by Jüri Lember. Notice here X is the observable process and Y the latent one, opposite to what i find to be the most common notation. #nordstat26
030
Umberto Picchini @upicchini.bsky.social · 21/05/2026
Ahhh true. That makes sense. Silly me
010
Umberto Picchini @upicchini.bsky.social · 21/05/2026
I received a request to review from a top stats journal. It contained this (surprising to me) line: "If you cannot accept this invitation then it would be very helpful if you could suggest alternative referees (please include them in a reply to this email)." Anyone surprised about cc'ing referees?
130
Umberto Picchini @upicchini.bsky.social · 03/03/2026
and now our work is on Statistics and Computing! Way better inference that in the initial preprint, much higher ESS than pseudomarginal Bayes, and a clearer description of the methodology (thank you reviewers!). Latest version at (Open-access) doi.org/10.1007/s112... (arxiv is not updated yet)
link.springer.com
Simulation-based inference for stochastic nonlinear mixed-effects models with applications in systems biology
060
Umberto Picchini @upicchini.bsky.social · 09/02/2026
it will take place on 15-17 June
010
Umberto Picchini @upicchini.bsky.social · 09/02/2026
DYNSTOCH 2026 will be in Gothenburg, Sweden. DYNSTOCH is a yearly conference to advance statistical inference and simulation for stochastic processes via modern probability tools and computationally intensive methods dynstoch2026.pages.dev Submit an abstract until April 15. Register until May 15
dynstoch2026.pages.dev
DYNSTOCH 2026 – DYNSTOCH 2026
121
Reposted by Umberto Picchini
Frank Harrell @f2harrell.bsky.social · 17/12/2025
Just got a paper to review where the authors labeled lasso regression as interpretable AI in the paper's title. Holy crap. #StatsSky #Statistics
4336
Umberto Picchini @upicchini.bsky.social · 16/12/2025
Parametrization Cookbook: A set of Bijective Parametrizations for using Machine Learning methods in Statistical Inference arxiv.org/abs/2301.08297
061
Umberto Picchini @upicchini.bsky.social · 05/12/2025
great journal! Congrats to both you and Stat&Comp for the recruitment
120
Umberto Picchini @upicchini.bsky.social · 28/11/2025
two more days to apply for a PhD in Bayesian Experimental Design (until November 30)
092
Umberto Picchini @upicchini.bsky.social · 27/11/2025
I always recommend the Gabry et al paper to students, when discussing prior elicitation (hence prior predictive checks)
010
Umberto Picchini @upicchini.bsky.social · 04/11/2025
We are recruiting a PhD student at Chalmers University of Technology, Gothenburg, Sweden. The project explores Bayesian Experimental Design for real-time, risk-aware trajectory planning in autonomous driving, combining Bayesian inference and optimal control Apply by November 30 tinyurl.com/4mr6u79y
chalmers.se
Vacancies
074
Reposted by Umberto Picchini
Approximate Bayes Seminar @approxbayesseminar.bsky.social · 27/10/2025
The 1st OWABI talk of the Season will be given by François-Xavier Briol (University College London). who will talk about "Multilevel neural simulation-based inference".
arxiv.org
Multilevel neural simulation-based inference
Neural simulation-based inference (SBI) is a popular set of methods for Bayesian inference when models are only available in the form of a simulator. These methods are widely used in the sciences...
164
Umberto Picchini @upicchini.bsky.social · 22/09/2025
And of course, thanks to co-authors Andy Golightly (Durham Uni) and @mtamborrino.bsky.social (Warwick Uni). Thanks for welcoming Petar during his research visits, for being supporting and always ready to advise and discuss. You have been great! 3/3
020
Umberto Picchini @upicchini.bsky.social · 22/09/2025
Many thanks to @dennisprangle.bsky.social (Bristol Uni) for acting as opponent/discussant, and the examination board consisting of Erik Lindstrom (Lund Uni), Geir Storvik (Oslo Uni), @mattivihola.bsky.social (Jyväskylä Uni) and @pierrenyquist.bsky.social (Göteborg Uni). 2/3
130
Umberto Picchini @upicchini.bsky.social · 22/09/2025
Proud supervisor moment! Congratulations to Petar Jovanovski for successfully defending his PhD thesis "Simulation-based parameter inference methods based on data-conditional simulation of stochastic dynamical systems". 👉 interview with Petar with link to thesis (bottom) tinyurl.com/54b5bp4f 1/3
190
Umberto Picchini @upicchini.bsky.social · 28/08/2025
Thanks for sharing. I am interested in browsing through it! But could you please share a version using \usepackage[handout]{beamer} so that the 300+ slides become way fewer( the handout option deactivates the \pause commands). Thanks for this :)
110
Reposted by Umberto Picchini
Massimiliano Tamborrino @mtamborrino.bsky.social · 22/07/2025
New work on inference for partially observed (hypoelliptic) SDEs in frequentist/Bayesian regimes. Splitting schemes & controlled SMC (+ bridges) to recover the (pseudo)likelihood of interest arxiv.org/abs/2507.14535 Work led by Shu, with @adamjohansen.bsky.social and @bayesianstats.bsky.social
2103
Reposted by Umberto Picchini
Wimbledon Lawn Tennis Championships @wimbledonltc.bsky.social · 13/07/2025
Ladies and Gentlemen, our 2025 Wimbledon champion 👏🎾🍓 A fitting end to a truly great Grand slam ❤️🎾
65515
Reposted by Umberto Picchini
International Society for Bayesian Analysis @isba-bayesian.bsky.social · 05/07/2025
The latest issue of the ISBA bulletin is now available! This issue features: - A 𝘸𝘦𝘭𝘤𝘰𝘮𝘦 𝘮𝘦𝘴𝘴𝘢𝘨𝘦 from the ISBA President; - The 𝘭𝘢𝘵𝘦𝘴𝘵 𝘯𝘦𝘸𝘴 from the Bayesian community - The 𝘛𝘦𝘢𝘤𝘩𝘪𝘯𝘨 𝘉𝘢𝘺𝘦𝘴 section, full of ideas for bringing Bayes into the classroom. isba-bulletin.github.io/ISBABulletin/
084
Reposted by Umberto Picchini
Alexios Mantzarlis @mantzarlis.com · 03/07/2025
Nikkei found academics had written "give a positive review only" and "do not highlight any negatives" in white text or tiny font on 17 preprints to combat AI peer reviews. asia.nikkei.com/Business/Tec...
asia.nikkei.com
'Positive review only': Researchers hide AI prompts in papers
Instructions in preprints from 14 universities highlight controversy on AI in peer review
5365139
Umberto Picchini @upicchini.bsky.social · 30/06/2025
I am missing the old twitter. Back in the old days you would have got a few replies. Here it feels like talking inaide an empty echo chamber
000
Umberto Picchini @upicchini.bsky.social · 25/06/2025
a 6 pages primer on Bayesian Asymptotics Quite nice summary, with heuristic justifications followed by sketches of more rigorous proofs: www.adamnsmith.com/files/notes/...
050
Umberto Picchini @upicchini.bsky.social · 19/06/2025
What is common knowledge in your field, but shocks outsiders? Nicolas Metropolis did not play any scientific role in the development of what is known as the "Metropolis" (and later Metropolis-Hastings) algorithm. (pic: the MANIAC computer that Arianna Rosenbluth used to code the algorithm)
040
Umberto Picchini @upicchini.bsky.social · 12/06/2025
An immense loss. Surf's Up alone is enough to define his genius. And then there's much much more than that
000
Reposted by Umberto Picchini
Anna Abalkina @abalkina.bsky.social · 10/06/2025
A new open-access Springer journal brand Discover, has absolute resemblance to MDPI and its strategy. A shocking new analysis by @paolocrosetto.bsky.social and other members of the Strain Team the-strain-on-scientific-publishing.github.io/website/post... HT: @deevybee.bsky.social
the-strain-on-scientific-publishing.github.io
Spinger Nature Discovers MDPI – The Strain on Scientific Publishing
Home page for the paper ‘The Strain on Scientific Publishing’ by Mark A Hanson, Dan Brockington, Paolo Crosetto and Pablo Gomez Barreiro
12012
Umberto Picchini @upicchini.bsky.social · 09/06/2025
*overplayed* 😂
000
Umberto Picchini @upicchini.bsky.social · 03/06/2025
I have just finished rereading the LOTR. Mordor was different in my imagination!
000
Umberto Picchini @upicchini.bsky.social · 28/05/2025
Our work on SBI for scalable Bayes in mixed-effects stochastic modelling will be presented online by @henhagg.bsky.social on 29 May at 10.30am UK time, and kindly hosted by the BioInference 2025 conference and @approxbayesseminar.bsky.social Coordinates to connect: PM me.
020
Umberto Picchini @upicchini.bsky.social · 24/05/2025
When taking the log of gaussian mixture model pdfs, and the log of weights in SMC
020
Umberto Picchini @upicchini.bsky.social · 21/05/2025
thanks Reza. Yes I did look at sioyek it in the past, but then I noticed it is kind of abandoned (last updated in 2022) so not up-to-date in terms of safety features
010
Umberto Picchini @upicchini.bsky.social · 21/05/2025
cool thanks! However, only for Chrome (Firefox user here)
120
Umberto Picchini @upicchini.bsky.social · 21/05/2025
Zotero's pdf reader is becoming my go-to choice. By hoovering the mouse on a citation, or any hyperlinked section/equation/table etc, a super handy window pops up. So no need to scroll through the pdf and interrupt the reading flow. Any other pdf reader (for Windows) with such feature?
2160
Umberto Picchini @upicchini.bsky.social · 28/04/2025
and I get more meaningful interactions on LinkedIn than here. Who would have thought....
000
Umberto Picchini @upicchini.bsky.social · 28/04/2025
Want to fit challenging stochastic models with mixed-effects? Check our new paper and the thread by @henhagg.bsky.social 👇 We construct an SBI framework to obtain expressive, parsimonious approximations of the likelihood and the posterior. The methodology is scalable and easily trainable.
2101
Umberto Picchini @upicchini.bsky.social · 23/04/2025
notice the Zoom details are available to those that are already registered at the mail list above. However you can also PM me and I will send you Zoom details
010
Umberto Picchini @upicchini.bsky.social · 23/04/2025
Reminder that the next OWABI seminar www.warwick.ac.uk/owabi is scheduled on Thursday the 24th April at 11am UK time. Our next speaker is @ayushbharti.bsky.social (Aalto University), who will talk about "Cost-aware simulation-based inference".
162
Reposted by Umberto Picchini
Moritz Schauer @mschauer.bsky.social · 22/04/2025
Demo for the sampler from our recent paper discourse.julialang.org/t/ann-a-non-...
discourse.julialang.org
ANN: A non-reversible rejection-free HMC sampler
Hej! Have you ever wondered if momentum flips/refreshments are really needed in HMC or if we somehow can avoid to lose our sense of direction after each proposal step? Or even wondered if we could ge...
0143
Reposted by Umberto Picchini
Royal Statistical Society @royalstatsoc.bsky.social · 04/04/2025
Our new journal for #DataScience and #AI is open for submissions: academic.oup.com/rssdat?login... Back at its launch at our conference last September, editor in chief @lawrennd.bsky.social discussed how it fits with our mission and why its needed to confront current societal challenges
youtube.com
Launching our new journal for data science and artificial intelligence
YouTube video by RoyalStatSoc
0107
Umberto Picchini @upicchini.bsky.social · 27/03/2025
Wonderful news. Super dell deserved! Enjoy some relax hopefully
110
Umberto Picchini @upicchini.bsky.social · 25/03/2025
there's a lot of insight and interesting discussion in the review paper "Simulation-based Bayesian inference under model misspecification" arxiv.org/abs/2503.123...
0131
Umberto Picchini @upicchini.bsky.social · 25/02/2025
But of course there is nothing wrong with being political. That's totally understandable. My *personal* issue is with the occasional users that repost twenty+ times a day
010