# MetaPhys: Contactless Physiological Sensing of Multiple Subjects Using RIS-Based 4-D Radar

> Research article (IEEE Internet of Things Journal, 2023) · cited 29× · AI/ML

**Wikidata**: [openalex:W4323338736](https://www.wikidata.org/wiki/openalex:W4323338736)  
**Source**: https://4ort.xyz/entity/metaphys-contactless-physiological-sensing-of-multiple-subjects-using-ris-based-4-d-radar