FIELD NOTES
Handpicked writings
FEATURED ARTICLE
24 Feb 2026 · 2 MIN READ
Detecting a heartbeat through a wall with IR-UWB radar
Vision-X had to answer one question for firefighters: is there a living person behind this wall? Thermal cameras can't. Radar micro-Doppler can.
PythonTensorFlowONNXArduino UNO Q
Edge AISignal ProcessingComputer Vision
LATEST ARTICLES
18 Jan 2026 · 2 MIN
Cleaning 1.99M rows without losing the signal
Building Ledgr's Bronze/Silver/Gold pipeline meant answering one ugly question 1.99 million times: is this zero a real zero, or missing data?
PythonSnowflakePandas+2
Data EngineeringSnowflakeML
9 Nov 2025 · 2 MIN
What 10+ clients taught me about LiDAR annotation quality
Panoptic segmentation, 3D tracking, and the QA workflows that separate a dataset a model can learn from and one that quietly poisons it.
PythonCVATLabelbox+2
Computer VisionData QualityAnnotation
30 Sept 2025 · 2 MIN
Building an RL environment where safety is non-negotiable
Railway dispatch has a hard constraint: two trains cannot occupy the same block. Here's how to encode that so an agent can't learn its way around it.
PythonDockerFastAPI+1
Reinforcement LearningPythonSystems
