A proposito dos sensores

Inexpensive sensors have become a means for simple and cheap pollution monitoring projects ranging from volunteers riding around London on bikes wearing specially equipped backpacks to smoke detectors modified by University of California researchers to detect ultra-fine particles to the mapping of pollution in lower Manhattan through handheld devices. "We were going for simplicity and ease of use," notes digital media artist Brooke Singer, co-creator of the third effort, known as the Area's Immediate Reading (AIR) project. "This will help ordinary people participate in the conversation about air quality issues--a conversation they don't usually have access to." Next month, new-media artist Shannon Spanhake will launch through San Francisco State University a project to monitor pollution in San Francisco using a network of hundreds of volunteers equipped with cell phone-sized devices outfitted with sensors. Spanhake's intention is to teach students to construct the devices themselves and enable the network using the city's planned municipal Wi-Fi infrastructure. Maintaining data quality can become challenging because low-cost sensors allow collection of so much information. Researchers aim to tackle this challenge by improving their data-processing software. Low-cost sensors are envisioned as tools for environmental science initiatives in addition to pollution monitoring and public health studies.
mais info http://www.newscientist.com/search.ns?doSearch=true&query=air+quality