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Daniel Roelfs

@danielroelfs.com

390 followers 118 following 25 posts

Data Scientist - PhD in computational neuroscience - he/him - #rstats / #python danielroelfs.com

Posts Replies Media

Daniel Roelfs @danielroelfs.com · 04/01/2026

The figures in the original report are clear, consistent, and professional so I wanted to discuss what their reasoning was and how to apply it elsewhere 😊

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Daniel Roelfs @danielroelfs.com · 13/05/2025

Using publicly accessible data from the EU's Copernicus satellite project I did some (very) simple analysis on vineyard health over the course of a few years and showed how one might use it to measure recovery after a plot is razed due to illness or other planned or unplanned damage to the plants 🌱

Plot showing a time series for 3 datapoints, two cases (where vineyard replanting happened at different timepoints in 2018 and 2021) and a control plot

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Daniel Roelfs @danielroelfs.com · 30/12/2024

It also let's us create some new nerdy plots like a GitHub tile plot, but for runs across the year:

Type of GitHub tile plot using Strava running data where each tile represents the kilometers run during the day. Sparse data with some data visualisation issues around the beginning and end of the year due to overlapping week numbers and because not all years start on Monday

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Daniel Roelfs @danielroelfs.com · 30/12/2024

This let's you (re)create some analysis that is only available for subscription users and create plots that aren't available in Strava at all

Cumulative plot showing the cumulative kilometers ran during the 2022 (in yellow), 2023 (in pink), and 2024 (in 2024)

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Daniel Roelfs @danielroelfs.com · 24/11/2024

Last Tuesday I defended my PhD in computational neuroscience and psychiatric genetics 🥳 PhD theses are rarely read outside of the supervisors and committee, so I tried to write it in an accessible way and published a digital version here: thesis.danielroelfs.app - Daniel Roelfs, PhD

Photo of myself presenting at the trial lecture with a slide on twin-based studies in the background

Photo of myself during the disputation with a "thank you" slide in the background

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Daniel Roelfs @danielroelfs.com · 09/05/2024

Scientific publishing (Elsevier and Springer-Nature specifically) has higher profit margins than some of the biggest tech companies such as Apple and Google (up to 38% 🤯) . These margins have been stable for years

Barplot showing the profit margins for a number of scientific publishers and other companies for comparison

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Daniel Roelfs @danielroelfs.com · 09/05/2024

Open access fees for some of the biggest journals have exceeded $11.000 (120.000 NOK) PER ARTICLE.

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