Biogeophysical Admittance Spectroscopy (BAS): A Unified Multimodal Framework for Reagent-Free Solid-State Diagnostic Support

This paper introduces the Biogeophysical Admittance Spectroscopy (BAS) framework, a disruptive approach to Point-of-Care (PoC) diagnostic support that eliminates the dependency on chemical reagents. By integrating four physical domains Kinetic Electrochemistry (Hydro-Logics), Dielectric Spectroscopy (Hanai-Bruggeman), Time Domain Electromagnetics (TEM), and Collective Optical Scattering the BAS system generates a five-dimensional state vector for cellular and molecular triage. Deployed on an ESP32-S3 edge computing platform, the system utilizes Physics Informed Machine Learning to ensure thermodynamic and electromagnetic consistency. Preliminary results suggest a paradigm shift in technological sovereignty for clinical and hydrometallurgical monitoring in resource constrained environments.