Onionlike polymer particles ideal for secure encryption and identification

Clever geometry is the basis of a new material that is said to be ideal for secure data encryption and dense optical information storage [Adv. Mater., 16, 516 (2004)”>.

The material consists of a lattice of onionlike spheres in which the particle core and its layers each contain a different dye. The material can hold four or more pieces of information in one spot—not just two as in binary optical data storage. And it opens a door to high-density three-dimensional optical data storage.

ENCAPSULATED In a three-dye system, core, shell, and matrix are labeled with separate dyes.

“The approach is really simple,” says lead researcher Eugenia Kumacheva, associate professor of chemistry at the University of Toronto, who worked with postdocs Ilya Gourevich and Hung H. Pham and microscopist James E. N. Jonkman. They start with colored colloids—polymeric nanospheres labeled with a dye—for example, an ultraviolet dye. Then they envelop the nanosphere, what Kumacheva calls the core, with a shell of another polymer labeled with a dye that has a spectrum entirely distinct from the first—say, a visible dye. Any number of dye-polymer shells can be added. The last shell then becomes the matrix that holds the layered particles.

Chemical & Engineering News
ISSN 0009-2347
Copyright © 2004

April 19,2004
Volume 82, Number 16
p. 10

Montreal parking meters run embedded Linux

Montreal Parking Meters Run Linux

Posted by michael on Tuesday April 20, @05:06PM from the working-for-the-man dept.

jbecherv writes “According to LinuxDevices.com, new-fangled Montreal parking meters run embedded Linux (Google Cache). The City of Montreal is planning to roll out 500 to 800 wireless, solar-powered parking payment stations based on embedded Linux. There is even a device profile (Google Cache) that show some details about the meters… These meters run kernel 2.4.19 on a 206MHz StrongARM SA-1110. Each system has 64MB of RAM, boots from a CF device, and is networked wirelessly via GPRS.”

Click here for SlashDot original article

What can Google do for you tommorrow?

Speculating About Gmail

Posted by michael on Monday April 05, @04:05AM
from the talk-is-cheap dept.


rjelks writes “The Register is running an article about Google’s new email service that was mentioned earlier, here. The story details the new privacy concerns about Gmail’s privacy policy and Google’s tracking habits. The policy states that Google will not guarantee the deletion of emails that are archived even if you cancel your account. ‘The contents of your Gmail account also are stored and maintained on Google servers in order to provide the service. Indeed, residual copies of email may remain on our systems, even after you have deleted them from your mailbox or after the termination of your account.'” Reader cpfeifer writes “Rich Skrenta (founder of ODP, and Topix) speculates in his blog that the real product Google is creating isn’t web search or email, but a massively scalable, distributed computing platform. ‘It’s a distributed computing platform that can manage web-scale datasets on 100,000 node server clusters. It includes a petabyte, distributed, fault tolerant filesystem, distributed RPC code, probably network shared memory and process migration. And a datacenter management system which lets a handful of ops engineers effectively run 100,000 servers.’ If he’s right, the question isn’t what product will Google announce next, but what product will they not be able to announce?”