"Technological Progress in integrated, low-power, CMOS (complementary metal oxide semiconductor) communication devices and sensors makes a rich design space of networked sensors viable. They can be deeply embedded in the physical world and spread throughout our environment like smart dust. The missing elements are an overall system architecture and a methodology for systematic advance. To this end, they identify key requirements, develop a small device that is representative of the class, design a tiny event-driven operating system, and show that it provides support for efficient modularity and concurrency-intensive operation. Their Operating System fits in 178 bytes of memory, propagates events in the time it takes to copy 1.25 bytes o memory, context switches in the time it takes to copy 6 bytes of memory and supports two level scheduling. The analysis lays a ground for future architectural advances". [3]

•Is it possible to make an estimate of the battery life?
It is possible to make an estimate of battery life when working with a specific hardware and software, although this information would not apply for a different group of sensors.

•Are RFIDs Network Sensors?
Yes, they can detect properties of the environment or a certain object such as temperature, chemical presene, on so on, and forward the information to a base station; which is the main characteristic of a sensor network.

•How will sensors be in the future?
There are basically two ways in which sensors can evolve. Some will become more powerfull, and some smaller.

•Can Sensor Networks become a privacy issue?
Sensor Networks are a privacy issue already. There are a good number of projects that have been cancelled because of the pressure of social groups, an example is that Benetton cancelled the usage of RFIDs to track their inventory.

•Loren P. Clare, Esther H. Jennings, Jay L. Gao, “Performance Evaluation Modeling of Networked Sensors”, Ca, USA

•Adrian Perrig, Robert Szewczk, Victor Wen, David Culler, “Security Protocols for Sensor Networks” University of California

•Jason Hill, Rober Szewcsyk, Alec Woo, Seth Hollar, David Culler Kristofer Pister, "System Architecture Directions for Network Sensors" Berkeley, CA

•http://www.aimglobal.org/technologies/rfid/

•http://news.com.com/2010-1069-980325.html

•http://www.rfidsociety.org/

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