A Nonlinear Complexity Index for Wearable PPG Cardiovascular Stability: Multiscale Validation, Systematic Evaluation Correction, and Bayesian Parameter Optimization

This feed contains multiple arXiv preprints across medical sensing, wireless/optical communications, and signal processing. Notable items with security/privacy or safety implications include: a wearable PPG-based cardiovascular stability index (SCSI) addressing evaluation artifacts but exposing deployment and false-negative/false-positive performance concerns for medical screening; cross-subject iEEG reconstruction from scalp EEG (CAST), which raises neural-privacy risks by enabling inference of intracranial signals for unseen subjects; analysis of automotive radar performance under many-inter