The system and olfactory sensor (IMAGE) Kyushu University Caption Subjects begin by breathing into a collection bag. The bag is then connected to the olfactory sensor, which analyzes the compounds found in the individual's breath. Based on the concentration of the compounds, the machine learning system identifies the individual. Credit Kyushu University/Yanagida lab Usage Restrictions Only for media and non-commercial use. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.