BCI CIRCULAR ECONOMY CIRCULARITY CIRCULARITY ASSESSMENT CIRCULARITY GAP CIRCULARITY INDICATORS CSP EEG Electrocardiogram (ECG) Emfit FBCSP (filter bank common spatial pattern) LC sensor MEASURING CIRCULARITY Riemannian geometry SUSTAINABILITY Seismocardiography (SCG) acceleration accelerometers acoustic emissions adaptive recursive least squares filter (ARLSF) ageing ballistocardiogram ballistocardiography blood pressure body sensor network capacitive sensors cardiac mechanics cardiac output compression therapy consumer-wearable devices