James Verbus2026-09-07T13:20:28+00:00https://jverbus.github.io/James Verbusjames.verbus@gmail.comExtended Isolation Forest for Distributed Spark/Scala Anomaly Detection2026-09-06T00:00:00+00:00https://jverbus.github.io/2026/03/18/announcing-extended-isolation-forest-support/Adding Extended Isolation Forest to the Spark/Scala library and comparing it with the reference implementation.Reinforcement Learning for Orbital Transfers at the 2026 AI Winter School (Brown University)2026-09-06T00:00:00+00:00https://jverbus.github.io/2026/01/09/brown-physics-ai-winter-school-workshop/Training PPO policies for orbital transfers and comparing their trajectories and delta-v with a Hohmann baseline.Exploring LLMs and RAG at the 2025 AI Winter School (Brown University)2026-09-06T00:00:00+00:00https://jverbus.github.io/2025/02/10/brown-physics-ai-winter-school-workshop/A workshop on querying physics papers with LLMs and checking the answers against retrieved source passages.Announcing ONNX Support in Isolation Forest2026-09-06T00:00:00+00:00https://jverbus.github.io/2024/09/23/announcing-onnx-support-in-isolation-forest/Exporting standard Isolation Forest models trained in Spark for inference with a compatible ONNX runtime.Finding AI-Generated Faces in the Wild2026-09-06T00:00:00+00:00https://jverbus.github.io/2024/08/15/finding-ai-generated-faces-in-the-wild/Evaluating synthetic-face detection across GAN and diffusion engines, including held-out generators and reduced image quality.Detecting AI-Generated Profile Photos2026-09-06T00:00:00+00:00https://jverbus.github.io/2023/06/20/detecting-ai-generated-profile-photos/Detecting StyleGAN-generated profile photos with compact embeddings, and the limits of that approach.Using deep learning to detect abusive sequences of member activity2026-09-06T00:00:00+00:00https://jverbus.github.io/2021/09/02/using-deep-learning-to-detect-abusive-sequences-of-member-activity/Detecting logged-in profile scrapers from the order and timing of their requests.Open Source: Spark/Scala Isolation Forest Library2026-09-06T00:00:00+00:00https://jverbus.github.io/2019/08/13/open-source-isolation-forest-spark-scala/Why we built a distributed Isolation Forest implementation for detecting unusual account activity at LinkedIn.Detection of unusual travel patterns to prevent user account compromise2026-04-28T00:00:00+00:00https://jverbus.github.io/2016/10/07/insight-castle-compromised-account-detection/Insight Data Science consulting project using unsupervised anomaly detection to flag unusual travel patterns and possible account compromise.Calibrating the LUX Dark Matter Experiment2026-09-06T00:00:00+00:00https://jverbus.github.io/2016/08/18/calibrating-the-lux-dark-matter-experiment/Measuring the charge and light response of liquid xenon to low-energy nuclear recoils using D-D neutron scattering in LUX.