Mobile Phones and Social Signal Processing for Analysis and Understanding of Dyadic Conversations -- Turns Analysis for Automatic Role Recognition -- Speaker Diarization of Multi-party Conversations Using Participants Role Information: Political Debates and Professional Meetings -- Invisible, Passive, Continuous and Multimodal Authentication -- The Metaphysics of Communications Overload -- Capturing Performative Actions for Interaction and Social Awareness -- Negotiation Models for Mobile Tactile Interaction -- Direct Tactile Coupling of Mobile Phones with the feel abuzz System -- A Multimodal Contact List to Enhance Remote Communication.