All articles
arxiv arXiv cs.AI · 5h ago

Reinforcement Learning for Computer-Use Agents with Autonomous Evaluation

The authors propose a reinforcement learning fine-tuning framework that utilizes autonomous vision-language evaluation as a scalable supervision signal for GUI agents, eliminating the need for manual labels or task-specific heuristics. By treating evaluator feedback as a noisy binary reward channel and deriving a noise-corrected estimator for Proximal Policy Optimization, the method addresses the difficulty of obtaining machine-readable rewards in open-ended desktop environments.

arxiv arXiv cs.AI · 6h ago

Overrefusal from Small On-Premises LLMs in Criminal Legal Context

A study investigates the impact of overrefusal on small, on-device large language models when processing legal prompts, finding that authority-style prefixes systematically increase refusal rates by 2 to 20 times compared to a no-prefix baseline. While role-play jailbreak prefixes showed mixed effects across different models, the results indicate that these small LLMs are unstable under contextual framings typical of real institutional users.

arxiv arXiv cs.AI · 7h ago

Uncertainty-Aware Longitudinal Forecasting of Alzheimer's Disease Progression Using Deep Learning

This study proposes a probabilistic framework for longitudinal modeling of Alzheimer's disease progression that combines ordinal diagnosis prediction, multi-horizon trajectory generation, and decomposed uncertainty estimation. The approach utilizes a Temporal Fusion Transformer encoder and an autoregressive Mixture Density Network to generate five-year probabilistic trajectories while quantifying both aleatoric and epistemic uncertainty.