Statistician · Data Scientist
Building models and the
systems that carry them.
I'm Julián Úsuga Ortiz, a statistician working across machine learning, automation, and business intelligence. This site collects my writing on data systems, statistical analysis, and the tooling I build along the way.
- Focus
- Machine learning · BI
- Field
- Statistics
- Based in
- Colombia
- Writing
- 3 posts
Writing
RSS- 01
How to Use Claude Code
A practical guide to Claude Code — slash commands, sub-agents, hooks, skills, and parallel workflows. Updated April 2026 with the commands that actually matter.
howto claude toolsRead - 02
Speed in Relational DB Management Systems
A comparative study of processing speed across three popular DBMS - SQLite, MySQL, and PostgreSQL - analyzing performance with text data using a multi-factor experimental model.
experiment dbms sqlRead - 03
Modeling Survival times in African countries using rstanarm
In this study we used a Bayesian Approach to model survival times of the people in different African countries.
survival analysis rstanarm bayesian approachRead