science + technology news

Messaging Worms Could Infect At Lightning Speed

October 20, 2003

A computer worm transmitted via instant messaging programs could infect half a million computers within 30 seconds, simulations have shown.

Self-assembled nanocells function as non-volatile memory

October 20, 2003

“Nanocells,” disordered assemblies of gold nanowires and conductive organic molecules, can function as non-volatile memory, Rice University chemists have found.

NanoCells offer the potential to reduce device size and fabrication costs by several orders of magnitude

The research appears in the Oct. 29 issue of the Journal of the American Chemical Society. It marks the first time that a self-assembled ensemble of molecular electronic components has been used… read more

Candle in the Dark

October 20, 2003

Cable Science Network, or CSN, is in the offing, offering in-depth coverage of science issues.

Moms Battle Genetic Engineering

October 20, 2003

A group of New Zealand mothers led by a former pop star have launched a provocative billboard campaign to protest their government’s decision to allow agricultural genetic engineering.

The billboard ads feature a four-breasted woman attached to a milking machine.

Gene linked to poorer memory

October 20, 2003

People with one form of a serotonin receptor short-term memory. This discovery is a first step towards finding the genes for intelligence.

Digging for Nuggets of Wisdom

October 17, 2003

“Text mining” is a technique that academics have been experimenting with for years but for which tools have only recently become commercially available. The prospect of rapidly scanning through reams of documents is stirring interest among researchers and analysts faced with more material than they can handle.

Bush’s Advisers on Biotechnology Express Concern on Its Use

October 17, 2003

The President’s Council on Bioethics has issued an analysis of how biotechnology could lead toward unintended and destructive ends, called “Beyond Therapy: Biotechnology and the Pursuit of Happiness.”

Concerns include selecting the sex of children, prescribing mood-changing drugs (such as Ritalin for children), and extreme longevity (“The pursuit of an ageless body may prove finally to be a distraction and a deformation”).

Mission Possible: Asteroid Tugboat Backed for Trial Run

October 17, 2003

An expert team of astronauts and space scientists has blueprinted a safety strategy for Earth — an asteroid tugboat — and they propose a mission to demonstrate the concept by 2015.

Details are in the November 2003 issue of Scientific American.

DNA copied with convection

October 17, 2003

A new automated process speeds up DNA copying for genetic analysis and biotechnology.

Using convection, the circulation of hot liquids, it can drive a chain reaction that makes strands of DNA multiply exponentially fast. A prototype system generates DNA copies four times faster than standard techniques and could be miniaturized to just .1 millimeter, the researchers claim.

The convection method could drive pocket-sized devices for quick, on-the-spot DNA… read more

Simulated patient helps prepare military medical care teams for bio/chem warfare

October 17, 2003

Medical Learning Company (MLC) has announced it expects to receive $1.75 million from the Army’s Telemedicine Advanced Technology Research Center to further develop SynPatient online patient simulation training software.

The goal is to enhance the military’s ability to rapidly train and prepare medical care-team personnel for biological and chemical warfare.

Headed by CEO Ray Kurzweil, MLC is a joint venture between Kurzweil Technologies Inc. and the… read more

The Future of Intelligent Technology and Its Impact on Disabilities

October 16, 2003

We will have pocket reading machines for the blind within a few years that read text ubiquitously — from signs, packages, menus, electronic displays, etc., says Ray Kurzweil.

“By 2010, these devices will be very tiny. You will be able to wear one on your lapel and scan in all directions. These devices probably will be used by sighted people as well, because they will allow us to get… read more

Relativity theory’s light-speed limit validated

October 16, 2003

Addressing a controversy first raised around 1910, three researchers have validated anew the special theory of relativity’s limitations on the speed of light.

In a paper published in the Oct. 16 issue of the research journal “Nature,” they reached their findings by applying information theory to experiments with lasers. They recorded experimental conditions in which the posted light speed limit appeared to be vastly exceeded — until they subtracted… read more

Nanotubes boost storage

October 16, 2003

Scientists have demonstrated that multiwalled carbon nanotube tips can be used to write more than 250 gigabits per square inch of data onto a polymer film.

The power efficiency of indent writing with MWCNT tips was found to be higher than that of conventional silicon tips owing to better heat transfer at the tip-polymer interface.

Lantz, M. et al. Carbon nanotube tips for thermomechanical data more

Design enables large neural nets

October 16, 2003

Researchers from Carlos III de Madrid University in Spain and MIT have devised a neural network architecture that uses a different mix of optics and electronics than previous schemes to accommodate large numbers of neurons.

The architecture leverages the computational strength of electronics and the fast communications abilities of light. It could be useful in systems that require optical input and neural net computation, like those used for robotic… read more

Mac Supercomputer: Fast, Cheap

October 15, 2003

The new “Big Mac” supercomputer at Virginia Tech could be the second most powerful supercomputer on the planet. The Big Mac’s theoretical peak is 17.6 teraflops, which would put it in second place behind Japan’s Earth Simulator.

The machine is the first supercomputer based on Macs; it is one of the few supercomputers built entirely from off-the-shelf components and cost only $5.2 million. Most of the top 10 supercomputers… read more

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