Mikkel Roald-Arbøl
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roald-arboel.com
Mikkel Roald-Arbøl
@roald-arboel.com
Thinking about what brains are doing and how they ended up doing it.

🇩🇪 Postdoc at University of Bonn.
🪲 Quantitative ethology, neuroethology and behavioural ecology
🔧 Developing open science software (mostly #rstats) and hardware
Lol. Well played.
October 15, 2025 at 7:30 AM
Makes sense. {rextendr} also seems to be getting good support! I just benchmarked a dummy example (sum function), and the Rust function runs slower than native R (both simply 2+2, sum(2,2) and writing a custom R function). Are there any benchmarks, or pointers for when using Rust is faster?
July 22, 2025 at 10:24 PM
I need help identifying a #bumblebee!

I’m in the Peruvian Andes, cloud forest near Salkantay (and Machu Picchu). We spotted this monstrously big orange bumblebee, 3-4cm long (see picture. We actually spotted them twice, but only managed to photo once). My best ID so far is Bombus dahlbomii, but…
June 13, 2025 at 1:57 AM
Sounds like my UK experience. For the oral exams in Denmark it’s never teaching assistants here either. Sometimes postdocs though. I really like a combination of the two, reminds me of this comic. I was always rubbish it written exams, but loved oral exams.
April 26, 2025 at 3:37 PM
Any folks needing to make a new CV? 📝

I've made a pretty, customisable Typst template that let's you write all your information in YAML, offers many different section layouts and allows a great deal of customisation.

typst.app/universe/pac...
April 15, 2025 at 9:57 AM
Here's an example of how it helped me literally *right now*. First example without a random slope; it's clear from the CIs that they are shared. I (of course) had to include `activity_measure` as a random slope, and tbh I'd have never thought twice about it without the visualisation reality check.
January 13, 2025 at 3:11 PM
Orbital by Samantha Harvey is one of the most hauntingly beautiful books I have ever read. It captures the grandeur of everything and nothing, the beauty in the mundane, the personal experience of living, the scale and perspective of time and space.

I cannot recommend this book enough!
December 30, 2024 at 12:52 PM