1) The document discusses sensor networks and their applications, challenges, and companies involved. It covers topics such as sensor network architectures, communication technologies, routing techniques, applications in various domains like energy, logistics, environment, buildings, transportation, health, and industry. 2) Key challenges discussed are efficient energy harvesting, security and privacy, hardware constraints, and interoperability. Many companies are working in areas like smart metering, logistics tracking, environmental monitoring, building automation, traffic management, healthcare, and industrial processes. 3) Future trends discussed include nanotechnology, standardization, and connecting sensor networks to the larger Internet of Things.

1. Smart Cities Wireless sensor networks Marc Pous, Researcher Jornades Abertis, BDigital, 2011

4. Source: Fabien Girardin and Josep Blat of 45

7. Sensor networks of 45

20. Applications and companies involved in sensor networks of 45

38. of 45 Nordic Semiconductors, Atmel Corp EnOcean Dust networks Libelium World Sensing, Sensing & Control, Urbiòtica, Streetline Crossbow Arch Rock (Cisco) Texas Instruments, Freescale Coronis/Elster Digi International

39. Future challenges in sensor networks of 45

45. Moltes gràcies! [email_address] Questions? [email_address]