From: Igor Mendelev (imendelev@costructures.com)
Date: Wed Aug 25 1999 - 16:18:24 MDT
It seems that (some) nanotech-like stuff will appear much sooner then was
expected (see below).
Does that mean the end of privacy (or at least very hard fight to preserve
some of it)?
Looks much scarier than (rather stupid - due to existence of removable
drives and totalitarian
- for obvious reasons) Justice Department's idea to disable encryption on
your home PC.
Igor
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EMBARGOED FOR RELEASE: 25 AUGUST 1999 AT 14:00:00 ET US
UK CONTACT:
Claire Bowles, New Scientist Press Office, London
claire.bowles@rbi.co.uk
44-171-331-2751
US CONTACT:
New Scientist Washington office
newscidc@idt.net
202-452-1178
New Scientist
Beware swarms of 'smart dust'
CLEANLINESS freaks have a new rationale for their pathological hatred of
dust-it could soon be spying on them.
Packed full of sensors, lasers and communications transceivers, particles of
"smart dust" are being designed to communicate with one another. They could
be used for a range of applications from weather monitoring to spying.
The tiny "motes" are being developed at the University of California,
Berkeley, as part of a programme to produce the smallest possible devices
that have a viable way of communicating with each other.
Each mote is made up of a number of microelectromechanical systems, or MEMS,
wired up to form a very simple computer. At present each mote is 5
millimetres long, but Kris Pister, one of the developers, says that in
future they could be small enough to remain suspended in air, buoyed by the
currents, sensing and communicating for hours.
The latest version not only has a thick-film battery powering it but also a
solar cell to recharge it. "This remarkable package has the ability to sense
and communicate, and is self-powered," says Randy Katz, a communications
engineer on the project. He presented the latest work at last week's
Mobicom99 mobile computing meeting in Seattle.
MEMS are made using the same photolithographic techniques as integrated
circuits, so once perfected they should be easy to mass-produce. Patterns
are etched out of a silicon wafer to create structures such as optical
mirrors or tiny engines.
Each mote in a smart-dust system will need to survive on extremely low
power, while being able to communicate kilobits of data per second. To this
end, says Katz, the team has designed motes that shut down parts of
themselves when they are not being used.
The latest challenge has been to devise a system that enables the motes to
communicate. Katz and his colleagues decided to use optical transceivers
because of their low energy demand compared with radio communications.
According to Pister they have already shown that they can monitor the dust
21 kilometres across San Francisco Bay. "There's no way you're going to get
that kind of range except with optical devices," he says.
"The base station may actually reside in a hand-held unit, much like a pair
of binoculars," says Katz. This would allow for simultaneous viewing of the
scene from afar while superimposing any measured data on the image. He adds
that this approach could be especially useful for hazardous applications
such as detecting chemical weapons or sending the dust into space.
The next task is to build distributed intelligence into the dust to produce
"swarm behaviour".
###
Author: Duncan Graham-Rowe
New Scientist issue 28th August 99
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