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Append-only notes for research, engineering, projects, and job prep.
Append-only notes for research, engineering, projects, and job prep.

A kid wanted to be a scientist, but lost precious things on the road.

A pragmatic look at prompt engineering, with practical techniques and a personal comparison of today's leading AI models like Claude, GPT, and Gemini.

A comprehensive guide to key regression model evaluation metrics. Understand the differences, advantages, and limitations of MAE, MSE, RMSE, and R² to choose the right metric for your machine learning projects.