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EVENT TIMELINE

2

REGULATION · 1 SOURCE · The Verge AI

Eight U.S. states sue OpenAI, alleging ChatGPT is unsafe for children

Eight U.S. states (Iowa, Kansas, Nebraska, West Virginia, Arkansas, Arizona, Idaho and Montana) have filed separate lawsuits accusing OpenAI of misleading the public about ChatGPT’s safety and unlawfully putting profit over child safety. The complaints allege harms including dangerous medical advice, degraded critical thinking, promotion of unhealthy behaviors, unlawful collection of minors’ data, and cite family lawsuits and recent hacking incidents; states seek civil penalties, injunctive relief and deletion of allegedly unlawfully collected data.

7.0

RESEARCH · 1 SOURCE · arXiv cs.AI

PINN for short-horizon potential-temperature forecasts with sparse observations (arXiv:2609.27290v1)

This arXiv preprint evaluates a physics-informed neural network (PINN) that enforces a pressure-coordinate thermodynamic advection–source equation and uses a diabatic-source closure fit from the preceding 12 hours (frozen during future-time training) to forecast potential temperature at 1–3 hour leads using hourly ERA5 data at three pressure levels. In tests, the PINN reduced RMSE versus the strongest baseline from 8.1% at 1 hour to 23.8% at 3 hours in an Oklahoma case, retained a 14.6–16.9% 3-hour advantage under observation-density down to 5%, transferred with 19.7–24.4% 3-hour improvement in an Alabama heat event, and degraded roughly 17.5% in a Montana complex-terrain stress test indicating a vertical-coordinate applicability limit.

6.0