Participatory Sensing focuses on how ubiquitous, off-the-shelf mobile technology can be harnessed to investigate and address significant challenges in public health, urban planning, and sustainability. 

Use sensor packed smart-phones to collect, share and organize data:

• camera, positioning systems, text entry, microphone, accelerometer, network connectivity

For a specific purpose:

• self-discovery
• advocate or make a case for change
• helping a domain expert gather data
• help community members learn about their neighborhoods

Using local knowledge tied to location, community …