Erratum: Fish can infer social rank by observation alone

Can Stable Social Groups Be Maintained by Homophilous Imitation Alone?

A central problem in the biological and social sciences concerns the conditions required for emergence and maintenance of cooperation among unrelated individuals. Most models and experiments have been pursued in a game-theoretic context and involve reward or punishment. Here we show that such payoffs are unnecessary, and that stable social groups can sometimes be maintained provided simply that...

Can We Infer Book Classification by Blurbs?

The aim of this work is to study the feasibility of an automated classification of books in the social network Zazie by means of the lexical analysis of book blurbs. A supervised learning approach is used to determine if a correlation between the characteristics of a book blurb and the emotional icons associated to the book by the Zazie’s users exists.

Earthquake Observation by Social Sensors

How Well Can TCP Infer Network State?

The Transmission Control Protocol (TCP) has been the protocol of choice for many Internet applications requiring reliable connections. The design of TCP has been challenged by the extension of connections over wireless links. We ask a fundamental question: What is the basic predictive power of TCP of network state, including wireless error conditions? The goal is to improve or readily exploit t...

Can Your Smartphone Infer Your Mood?

Our driving vision is a smartphone service, called MoodSense, that can infer its owner’s mood based on information already available in today’s smartphones. The service will fundamentally enhance context-awareness by providing clues about mobile users’ mental states. We report early results from studying 25 iPhone users in the field and the correlation between their mood and phone usage. We sho...