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Reposted by Leiv Rønneberg

Henri Pesonen @hpesonen.bsky.social · Sep 1

I'm looking for a Doctoral Researcher (PhD student) to work with me on simulation-based inference at Data Science Research Centre, Tampere University Check the link for details and send an application before October 10th.

tuni.rekrytointi.com/paikat/?o=A_...

Doctoral Researcher (simulation-based inference) / Väitöskirjatutkija (simulaatio-pohjainen päättely)

tuni.rekrytointi.com

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Leiv Rønneberg @ltronneberg.bsky.social · Jul 3

Playing around plotting some chemical structure embeddings coming from a VAE, and colouring by local intrinsic dimension looks almost like these colour blind test images.

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Leiv Rønneberg @ltronneberg.bsky.social · May 30

«– Når det ikkje er nokon risiko for å bli avslørt, og inga form for straff for å lyge, ventar vi frå standard økonomisk teori at alle skulle ha loge, seier Bjorvatn.»

Økonom overrasket at folk flest ikke tenker som økonomer

Éin av fire er villig til å lyge for ein tusenlapp

www.nrk.no

Reposted by Leiv Rønneberg

Valeria Vitelli @valeriavitelli.bsky.social · May 27

JOBS ALERT! PhD position & 3-y postdoc position in statistics within my research group at @ocbe.bsky.social @uio.no
Both are linked to a project funded from the Research Council of Norway on Integrative Bayesian clustering for high-dim data in omics

Deadline: 13 June 2025

More info & links below!

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Reposted by Leiv Rønneberg

Marit B. Veierød @maritbveierod.bsky.social · May 8

Join us in beautiful Oslo!
Associate Professor @ocbe.bsky.social
@uio.no
Deadline May 18th
www.jobbnorge.no/en/available...

Associate Professor at the Oslo Centre for Biostatistics and Epidemiology (276924) | University of Oslo

Job title: Associate Professor at the Oslo Centre for Biostatistics and Epidemiology (276924), Employer: University of Oslo, Deadline: Sunday, May 18, 2025

www.jobbnorge.no

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Leiv Rønneberg @ltronneberg.bsky.social · May 2

Glad to see this happening! I never understood why UK dads were not marching in the street already when I saw that my UK employer only offered *two weeks* paternity leave. Coming from Norway I had to trade in a minimum 4 months leave for a measly two weeks -- time with my daughter I won't get back.

British men urged to join ‘Dad strike’ calling for more paternity leave

Exclusive: Fathers planning protest with babies in London on 11 June to highlight UK’s ‘rubbish’ statutory leave, least generous in Europe

www.theguardian.com

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Leiv Rønneberg @ltronneberg.bsky.social · Feb 21

I’d also be interested in this, Martin. How it is structured, what is covered, what the pre-requisites are etc

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Leiv Rønneberg @ltronneberg.bsky.social · Feb 21

I think that could indeed be quite illuminating. Often we approach these topics trying to make them practical without requiring too much mathematical setup. You don’t *need* stochastic process theory to get at the core of GP regression, but you might need it to understand the finer details later on

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Leiv Rønneberg @ltronneberg.bsky.social · Feb 21

Interesting post! I helped run a similar module in Cambridge last year were we tried to cram in too much, covering basics of GPs *and* DPs. If the emphasis is on BNP I think one must mention DPs at some point, though it is a step up in abstraction compared to GPs. «distribution of distributions» etc

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Leiv Rønneberg @ltronneberg.bsky.social · Feb 3

It can be bounded from below and above, by \sqrt{n} and n, respectively. These cases each reflect say an extreme lengthscale, ell=\infty or ell=0, and so it appears almost like a measure of complexity. I'm struggling to come up with an intuitive explanation.

Does anyone have any ideas/references?

Leiv Rønneberg @ltronneberg.bsky.social · Feb 3

Working on a model involving some GP regression, coupled with a horseshoe prior for variable selection. In an attempt at counting the number of effective parameters of my model, the following quantity pops out quite naturally. Is this a well known quantity? 1/2

Here, in the context of GP regression, K refers to the n x n Gram matrix associated with a set of inputs and a covariance function, while lambda_j refers to the eigenvalues of K.

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Leiv Rønneberg @ltronneberg.bsky.social · Jan 13

Maybe I'll add that the call is very general across "computational science", encompassing biology, chemistry, physics etc. alongside maths & stats. Bayesian machine learning is just one of the projects within our department, see the link below
www.uio.no/dscience/eng...

Mathematics & Statistics - dScience – Centre for Computational and Data Science

Read this story on the University of Oslo's website.

www.uio.no

Leiv Rønneberg @ltronneberg.bsky.social · Jan 13

Second call for the DSTrain Postdoctoral programme @uio.no is up! The university is hiring 18 postdocs across 9 research areas and over 60 loosely defined projects.

Come work on Bayesian machine learning with us in beautiful Oslo

Deadline April 6th, please share!

DSTrain - dScience – Centre for Computational and Data Science

DSTrain is a 5-year postdoctoral programme that will award 36 postdoctoral fellowship positions of 36 months each in two calls over the programme period within the overarching frame of data science. T...

www.uio.no

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Leiv Rønneberg @ltronneberg.bsky.social · Jan 9

Are you assuming you are able to compute the derivatives as well, or simply that you know they are non-negative?

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Leiv Rønneberg @ltronneberg.bsky.social · Dec 26

Klassisk økonomfjas. Det er ikke modellene våre eller måleinstrumentene det er noe galt med — folk lider av «fantomfattigdom» borsen.dagbladet.no/nyheter/nord...

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Leiv Rønneberg @ltronneberg.bsky.social · Dec 17

Great department, great group, great city!

Jon Michael Gran @jmgran.bsky.social · Dec 16

Want to do a postdoc in Oslo? We're seeking candidates for a four year postdoc position in causal inference/time-to-event analysis.

Application deadline is January 31. See below for more information and feel free to take contact if you have any questions! www.jobbnorge.no/en/available...

Four year postdoc position at the Oslo Centre for Biostatistics and Epidemiology (OCBE) (272144) | University of Oslo

Job title: Four year postdoc position at the Oslo Centre for Biostatistics and Epidemiology (OCBE) (272144), Employer: University of Oslo, Deadline: Friday, January 31, 2025

www.jobbnorge.no

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Reposted by Leiv Rønneberg

Are @litterat.party · Dec 17

Tvert i mot, dette er på alle måter et skattemessig smutthull. Det er faktisk nøyaktig hva det er: Noe som teknisk sett ikke er ulovlig, men åpenbart heller ikke i tråd med intensjonen. Intensjonen er neppe at eiendomsbaroner skal få skattefritak.

Engebretsen viser til at Skatteetaten fleire gonger har fått spørsmål om burettslagsmodellen er lovleg, noko dei har stadfesta at han er.

– Dette er ikkje noko skattemessig smotthol på noko som helst måte, sier han.

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Leiv Rønneberg @ltronneberg.bsky.social · Dec 10

Overbygningen er vel laget av stål..?

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Leiv Rønneberg @ltronneberg.bsky.social · Dec 5

It's quite ironic that the term was first coined in a sociological essay warning *against* meritocracy, rather than lifting it up as an ideal.

The Rise of the Meritocracy - Wikipedia

en.wikipedia.org

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Leiv Rønneberg @ltronneberg.bsky.social · Dec 5

Always fun little tidbits on the wikis of famous mathematicians. Here on Riesz Frigyes' (*of the* Riesz representation theorem) lecturing style

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Leiv Rønneberg @ltronneberg.bsky.social · Dec 2

Yeah, I think for most applications something like a GAM or a GP would be the practical choice compared to a BNN. I'm wondering if the number of layers/parameters needed to get something truly more flexible is just too large to work with

Leiv Rønneberg @ltronneberg.bsky.social · Dec 2

Hmm, from an initial check __not really__. I initially only fit a single chain, so figured maybe I was exploring a single mode, but when I reran the model with 4 chains I still don't really see much multimodality. Maybe n is so small that the prior dominates?

Posterior samples from weight matrix of the middle layer

Reposted by Leiv Rønneberg

dmarthal @dmarthal.bsky.social · Dec 1

Bilbo meme with the first panel saying "Fit a BNN in Stan?" and the second panel saying "Why not? Why Shouldn't I do it?

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Leiv Rønneberg @ltronneberg.bsky.social · Dec 1

Also, in terms of the sampler complaining, Rhat and effective sample size is awful for most of the parameters (weights), but for the estimated function itself at the input locations it is generally Rhat < 1.02 and n_eff > 300 from 1000 samples. Nice to see these effects myself

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Leiv Rønneberg @ltronneberg.bsky.social · Dec 1

This is a fairly small BNN, "only" ~8k parameters. But given my 100 datapoints, I'm a little surprised that Stan is so efficient. Also a bit disappointed in how smooth the functions look (when sampling from prior), a GP would make quick work of this, even in a full Bayesian treatment.

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