Blog, Tim de Boer

Medical AI

Delphyr

Apr 2026
10 techniques to make LLMs safer in healthcare Output guards, structured outputs, citation verification, hallucination detection, practical methods for managing the probabilistic nature of LLMs.
11 min
Mar 2026
Why medical AI needs multiple safety checks How layered guardrails, across security, accuracy and focus, keep clinical AI reliable.
8 min
Jan 2026
Why medical AI needs citations On grounding clinical AI outputs in verifiable sources and traceable evidence.
7 min

LLMs

Mar 2024
Retrieval-augmented generation in LLMs How RAG extends an LLM's knowledge with a company's internal documents, without retraining the model.
7 min

Master's thesis & personal projects

Sep 2022
Building a brain-computer interface to play Space Invaders Six months of EEG, motor imagery and deep transfer learning.
18 min
Jul 2022
The building blocks of a brain-computer interface The six-step BCI pipeline: data collection, pre-processing, feature extraction, prediction, and the feedback loop that closes the cycle.
6 min
Aug 2021
Why, what and how to start your own BCI project A practical introduction: what BCIs are, which EEG devices are worth considering, and the neuroscience you need before collecting data.
10 min

Fundamentals

Jan 2021
Backpropagation in plain Python Implementing a neural network forward and backward pass from scratch with nothing but Python lists.
5 min
Oct 2020
Practical statistics in R A working reference for statistical tests: normality checks, t-tests, ANOVA, and their non-parametric counterparts.
11 min
Oct 2020
Essence of Bayesian networks DAGs, conditional probability tables, d-separation, and variable elimination.
11 min
Oct 2020
Essence of ontology reasoning Description Logic, Tboxes, Aboxes and the Tableaux algorithm for consistency checking.
8 min
Oct 2020
Propositional logic and SAT problems From brute-force truth tables to CNF, the DPLL algorithm, and stochastic SAT solvers.
10 min

Exercise physiology

Aug 2022
How coffee makes you run faster The benefits of caffeine for sport performance: what the evidence says, optimal dosing, and why individual variation matters.
6 min
Aug 2022
How to not dry out after exercise How dehydration affects endurance, sprint and cognitive performance, and the practical numbers to rehydrate correctly.
5 min
Aug 2022
Why Usain Bolt wouldn't run a marathon How concurrent strength and endurance training creates competing molecular adaptations, and what to do about it.
5 min