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Bert Zwart

@bertzwart.bsky.social
56 followers 19 following 12 posts

prof @ CWI & TU/e stochastic OR - probability - rare events - energy systems father - husband - has-been draughtsplayer - wannabe runner - girevik

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Bert Zwart @bertzwart.bsky.social · 28/03/2025
How do you handle outliers caused by heavy tails in an optimal way when you want to estimate (but not overestimate) the mean of a nonnegative random variable? With Bart van Parys, we answer this question in our preprint arxiv.org/abs/2503.21421
arxiv.org
Robust Mean Estimation for Optimization: The Impact of Heavy Tails
We consider the problem of constructing a least conservative estimator of the expected value $μ$ of a non-negative heavy-tailed random variable. We require that the probability of overestimating the e...
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Gabrielius Landsbergis @glandsbergis.bsky.social · 06/03/2025
We didn’t know then that it had all been agreed in advance in the secret Molotov-Ribbentrop Pact. Today, we have no excuse for such naivety. It’s a safe bet that the Trump-Putin Pact already exists—and we should act accordingly.🧵14/14
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Gabrielius Landsbergis @glandsbergis.bsky.social · 06/03/2025
The Trump-Putin Pact already exists, and we should act accordingly. There are some things we will never change with nice words or smart clothing. If you are worried about those things, you should understand where Trump's tactics come from. From Russia. A thread. 🧵1/14
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Joshua Livestro @joshualivestro.bsky.social · 28/02/2025
Apart from the bromance talk about him and Putin having been through so much together, it’s 100% clear after today where Trump’s loyalties lie. He attacked Ukraine for defending itself, claiming it (not Russia!) is “risking WW III”. Obscene.
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Garry Kasparov @garrykasparov.bsky.social · 28/02/2025
No, Trump has destroyed America in the eyes of the world.
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Bert Zwart @bertzwart.bsky.social · 20/02/2025
In joint work arxiv.org/abs/2502.13944 with Agnieska Janicka, Fiona Sloothaak and Maria Vlasiou, we provide a mathematical explanation of the empirical finding that congestion caused by traffic jams follows a Pareto law. We also give further empirical evidence using Dutch data. 1/4
arxiv.org
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Kustaw Bessems @kustaw.bsky.social · 19/02/2025
Er zijn geen 'vredesonderhandelingen'. Wat er gebeurt, is dat de Russische oorlog tegen Oekraïne nu wordt gesteund door de president van de Verenigde Staten.
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Bert Hubert 🇺🇦🇪🇺🇺🇦 @berthubert.bsky.social · 19/02/2025
The legality (not wisdom) of putting European private data on US clouds hinges on the availability of the US Privacy and Civil Liberties Oversight Board. Trump neutered this board, and the European parliament has taken notice & asked the European Commission what they think:
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Mira of Kyiv 🇺🇦 @reshetz.bsky.social · 18/02/2025
Molotov-Ribbentrop 2.0
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Nick Hedley @nickhedley.bsky.social · 17/02/2025
‘Grid-forming’ battery goes online in Australia www.pv-magazine.com/2025/02/17/g...
pv-magazine.com
‘Grid-forming’ battery goes online in Australia
The 185 MW / 370 MWh Koorangie battery energy storage project in Victoria has reached a major milestone with developer Edify Energy confirming the system has successfully exported power to the grid fo...
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Bert Zwart @bertzwart.bsky.social · 17/02/2025
Gevaarlijke combinatie van populisme en wensdenken.
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Bert Zwart @bertzwart.bsky.social · 16/01/2025
Mijn oudste bespreekt vandaag een boek van @ionica.mathstodon.xyz.ap.brid.gy op school in knutselvorm
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Bert Zwart @bertzwart.bsky.social · 13/12/2024
Stelselmatige geweldigdadigheden met een racistisch motief in de achtertuin van @omtzigt.bsky.social tegen buitenlandse kenniswerkers
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Bert Zwart @bertzwart.bsky.social · 20/11/2024
Useful overview of inequalities: www.lkozma.net/inequalities...
lkozma.net
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Bert Zwart @bertzwart.bsky.social · 19/11/2024
In our new preprint arxiv.org/abs/2411.11093 we illustrate the potential of using fluctuations in uncertainty to keep our grid safe at lower costs. We focus on dimensioning FCR-N reserves in the Nordic grid, combining real-life frequency data and a diffusion model for the frequency.
arxiv.org
Dynamic Dimensioning of Frequency Containment Reserves: The Case of the Nordic Grid
One of the main responsibilities of a Transmission System Operator (TSO) operating an electric grid is to maintain a designated frequency (e.g., 50 Hz in Europe). To achieve this, TSOs have created se...
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Bert Zwart @bertzwart.bsky.social · 13/11/2024
I should post something to show it's me. Like on the other platform, I'll post on whatever topic interests me. I just went out for a run, the first after having corona. My heart rate was 15 beats higher than normal - I'm still happy to be back at it.
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