What?! It's the 29th of February? A Cosmic Spatiotemporal Anomaly? No, Happy Leap Year Day!

Huh? My calendar says "29 February 2024"? I thought it was March already... Is this some sort of cosmic spatiotemporal anomaly, or a shift in the fundamental laws of nature (concept drift)?

No, apparently we are in a "spare" day year (approx. every 4 years), where we get an extra day in February, yay (Making 2024 366 days long)! This turns out to be a basic spatiotemporal concept (if you are on a big rock orbiting around a star). Space? The sidereal year is determined by how far the earth has to travel around the Sun to get back to the same position (940,416,480 km); and Time? How long it takes != Calendar year, but about 1/4 of an extra day in fact (365.25636 days). If you don't do something to correct it every so often, then you could end up celebrating Christmas in summer (oh, that's a thing in Australia!)

But if you have time (in your "spare" day) you may be interested in some actual spatiotemporal anomalies or concept drifts in my previous blogs.

Geospatial Anomaly Detection (Terra-Locus Anomalia Machina)

A four-part series using Apache Cassandra, Apache Kafka, Apache Lucene, and Geohashes to detect spatiotemporal anomalies at scale.

1 https://www.instaclustr.com/blog/geospatial-anomaly-detection-with-kafka-cassandra/

2 https://www.instaclustr.com/blog/geospatial-anomaly-detection-terra-locus-anomalia-machina-part-2-geohashes-2d/

3 https://www.instaclustr.com/blog/geospatial-anomaly-detection-part-3-3d-geohashes-and-drones/

4 https://www.instaclustr.com/blog/geospatial-anomaly-detection-part-4-cassandra-lucene-index-plugin/

Machine Learning Over Streaming Kafka Drone Delivery Data With Concept Drift

And a more recent blog series for a Drone delivery application use case, using Apache Kafka, Cadence, and TensorFlow for ML over streaming data with concept drift.

Part 1: Introduction

Part 2: Introduction to Batch Training and TensorFlow

Part 3: Introduction to Batch Training and TensorFlow Results

Part 4: Introduction to Incremental Training With TensorFlow

Part 5: Incremental TensorFlow Training With Kafka Data

Part 6: Incremental TensorFlow Training With Kafka Data and Concept Drift

Spinning Your Drones Drones with Cadence and Kafka

Where did the Spatiotemporal Drone delivery data come from? A previous series!

• Part 1:?Spinning Your Workflows With Cadence!
• Part 2:?Spinning Apache Kafka? Microservices With Cadence Workflows
• Part 3:?Spinning your drones with Cadence
• Part 4:?Architecture, Order and Delivery Workflows
• Part 5: Integration Patterns and New Cadence Features
• Part 6: How Many Drones Can We Fly?

And a Doodle: https://doodles.google/doodle/leap-day-2024/