SocialPulse: On-Device Detection of Social Interactions in Naturalistic Settings Using Smartwatch Multimodal Sensing. - Md. Sabbir Ahmed 001; Kaitlyn Petz; Noah French; Tanvi Lakhtakia; Aayushi Sangani; Mark Rucker; Xinyu Chen; Bethany A. Teachman; Laura E. Barnes (CoRR, 2026)