SocialMotion: Measuring the Hidden Social Life of a Building

In this paper we present an approach to analyzing the social behaviors that occur in a typical office space. We describe a system consisting of over 200 motion sensors connected in a wireless network observing a medium-sized office space populated with almost 100 people for a period of almost a year. We use a tracklet graph representation of the data in the sensor network, which allows us to efficiently evaluate gross patterns of office-wide social behavior of its occupants during expected seasonal changes in the workforce as well as unexpected social events that affect the entire population of the space. We present our experiments with a method based on Kullback-Leibler metric applied to the office activity modelled as a Markov process. Using this approach we detect gross deviations of short term office-wide behavior patterns from previous long-term patterns spanning various time intervals. We compare detected deviations to the company calendar and find and provide some quanti...

• Type: Conference
• Year: 2007
• Where: LOCA
• Authors: Christopher Richard Wren, Yuri A. Ivanov, Ishwinder Kaur, Darren Leigh, Jonathan Westhues
• Keywords: Electric Research Laboratories, LOCA 2007, Mitsubishi Electric Research, Office Space