1. ENGAGING PARTICIPANTS FOR COLLABORATIVE SENSING OF HUMAN MOBILITY HELENA RODRIGUES, MARIA JOÃO NICOLAU, RUI JOSÉ AND ADRIANO MOREIRA CENTRO ALGORITMI, UNIVERSIDADE DO MINHO, PORTUGAL 1st International Workshop on Ubiquitous Mobile Instrumentation, 8 September, 2012

2. 1st International Workshop on Ubiquitous Mobile Instrumentation, 2012 Outline 2  The problem  The Epi application  Preliminary results  Discussion

3. 1st International Workshop on Ubiquitous Mobile Instrumentation, 2012 The problem 3  How to collect data for human mobility analysis  Where do people spend more time during the day?  Which are the most frequent routes used by people? It is possible to suggest alternative and more sustainable paths for daily trips  Which could be the best decisions concerning new computing infrastructures deployments?  Large data sets  Extended periods of time

4. 1st International Workshop on Ubiquitous Mobile Instrumentation, 2012 The Epi application 4  Explore people as sensors  Laptop vs mobile phone  Social application  Text messages sharing between users  Collects information about nearby APs  Privacy policy  Preserves normal spatio-temporal behaviour of users  Text messages sharing as a service reward  Non-personalised advertisements through social services (in July and October 2010) to attract users

5. 1st International Workshop on Ubiquitous Mobile Instrumentation, 2012 Preliminary results 5 Web site: unique visitors per day Web site: number of downloads per day Application: number of active users per week.Collected data: number of records uploaded per week

6. 1st International Workshop on Ubiquitous Mobile Instrumentation, 2012 Discussion 6  Users are more active close to advertisement periods  Scalable solution for advertisement and distribution?  Improve users’ awareness about the value of the data collected collaboratively  Which should be the main characteristics of a mobile sensing application?  Open access/publication to/of the data  How to ensure privacy, trust and integrity?