/ • This is a web feed, also known as an Atom feed. Subscribe by copying the URL from the address bar into your newsreader. Visit About Feeds to learn more and get started. It's free. Visit website Recent posts Updated on $DATE light date mathias kindberg mathias kindberg Zola2025-10-09T00:00:00+00:00/atom.xml Cracking highly imbalanced datasets using mondrian conformal predictors 2025-10-09T00:00:00+00:00 2025-10-09T00:00:00+00:00 mathiaskindberg /blog/mondrian-conformal-predictors/ Recently, a customer offering a subscription service approached us with a churn case. The problem with churn cases is that the dataset tends to become highly imbalanced when we lower the time steps. DuckDB: Importing Polars dataframes the easy and hard way using Rust 2025-10-06T00:00:00+00:00 2025-10-06T00:00:00+00:00 mathiaskindberg /blog/polars-dataframe-to-duckdb-with-arrow/ Recently I have been working on a project where I did data manipulation through Polars Dataframes and then wanted to query the result with DuckDB for that OLAP goodness. I wanted to build on the Rust Arrow ecosystem. On the surface, Arrow looks like a nice ecosystem with good interoperability. Polars abstracts over Arrow. DuckDB advertises support for both Polars and Arrow. That turned out to be a mirage. Building Type Safe Structured Outputs with Rust and OpenAI 2025-04-29T00:00:00+00:00 2025-04-29T00:00:00+00:00 mathiaskindberg /blog/building-type-safe-structured-outputs-with-rust-and-openai/ I built a Hacker News AI news summarizer and AI relevancy scorer and, as the type safety and consistency enthusiast I am, I decided to explore structured outputs when interacting with the LLM models. 🌊 I am building for the maritime industry! 2024-02-01T00:00:00+00:00 2024-02-01T00:00:00+00:00 mathiaskindberg /blog/coming-soon/ I am excited to share my latest endeavor: a leap into the maritime industry! Combining my cloud and software expertise with my experience as a captain and my research building AI models based on maritime data, I am revisiting a field I deeply love, now focusing on digital and software innovations. Analog Sailing 2024-01-04T00:00:00+00:00 2024-01-04T00:00:00+00:00 mathiaskindberg /photography/analog-sailing/ A summer around the baltic Atacama 2023-05-11T00:00:00+00:00 2023-05-11T00:00:00+00:00 mathiaskindberg /photography/atacama/ Desert in 48 hours Torres del Paine 2023-05-08T00:00:00+00:00 2023-05-08T00:00:00+00:00 mathiaskindberg /photography/torres/ Abstract environments