science + technology news

How the Web changes your reading habits

June 24, 2005

Palo Alto Research Center researchers are developing ScentHighlights, which uses artificial intelligence to highlight sections of text it predicts you’ll be interested in based on your search words.

Chirpy chickadees signal deadliness of predators

June 24, 2005

Chickadees sing one of the animal kingdom’s most intricate alarm calls, a new study reveals, increasing the number of syllables in their battle cry depending on the deadliness of a sitting predator.

Microbes Can Produce Miniature Electrical Wires

June 23, 2005

Researchers at the University of Massachusetts Amherst have discovered a tiny biological structure that is highly electrically conductive.

The conductive structures, known as “microbial nanowires,” are produced by a novel microorganism known as Geobacter. The nanowires are only 3-5 nanometers in width, but durable and more than a thousand times long as they are wide.

The finding could provide new approaches to using microbes to assist in the… read more

Brain Sees Violent Video Games as Real Life — Study

June 23, 2005

The brains of players of violent video games react as if the violence were real, a study has suggested.

It found that as violence became imminent, the cognitive parts of the brain became active and that during a fight, emotional parts of the brain were shut down.

It suggests that video games are training the brain to react with this pattern.

Robo-pups created with curiosity in mind

June 23, 2005

Robotic puppies exhibiting a form of artificial curiosity are being developed at Sony’s research and development lab in Paris, France.

The Aibo pups display an innate artificial curiosity similar to that seen in baby animals. They slowly learn to explore the surrounding world, before playing with toys and trying to communicate with other Aibo dogs.

Each of the new Aibo dogs was given two software control mechanisms. Firstly,… read more

Livermore supercomputer ranked as world’s fastest

June 23, 2005

Lawrence Livermore National Laboratory now has the world’s most powerful computer, IBM’s BlueGene/L, according to this year’s Top 500 list, announced Wednesday at the International Supercomputer Conference in Heidelberg, Germany.

The BlueGene/L installed there contains 62,000 microprocessors that can handle 136.8 trillion calculations, or teraflops, per second.

New magnetic herding technique proposed to manipulate colloids in the body

June 22, 2005

Engineers have introduced a new magnetic shepherding approach for moving or positioning colloidal materials within organisms.

The “magnetic nanoparticle assembler” technique uses nanoscale “magnetic traps” consisting of suspended magnetic nanoparticles and a controllable external applied magnetic field. The nanoparticles act as nanoscale “tugboats” to push and pull comparatively large beads of colloids.

Potential applications range from the speedier assembly of molecules for biosensors or hybridization experiments, to precision… read more

In Chess, Masters Again Fight Machines

June 22, 2005

Rather than being the final word in the battle of man vs. machine, the Kasparov-Deep Blue match spurred the competition. More grandmasters are taking up the challenge posed by computers.

Scientists creat tiniest uniform, precisely shaped organic nanoparticles for delivering organic materials into the human body

June 21, 2005

University of North Carolina at Chapel Hill chemists have developed a method of creating the world’s tiniest manufactured particles — less than 100 nanometers — for delivering drugs and other organic materials into the human body.

Until now, most current techniques for particle formation were incompatible with organic materials, according to Dr. Joseph M. DeSimone, professor of chemistry and chemical engineering at UNC and N.C. State University.

That… read more

Patching the Body With Fabric From Protein

June 21, 2005

Researchers are working to create replacement human tissue from a naturally occurring protein, elastin.

In animal studies financed by the Army, Dr. Kenton Gregory, director of the Oregon Medical Laser Center, has succeeded in patching what would usually be fatal wounds to the gastrointestinal tract and other organs with living tissue that is accepted by the body and that eventually becomes part of the organ itself.

“We are… read more

Making molecules work

June 20, 2005

University of Sheffield researchers are developing synthetic molecular motors that simulate biological molecular motors, which operate by using molecular shape changes.

The researchers are using a polymer with weak acidic or basic groups along the backbone. For a polyacid, for example, in acidic conditions the molecule is uncharged and hydrophobic; it takes up a collapsed, compact shape. But when the acid is neutralised, the molecule ionizes and becomes much… read more

Further steps towards artificial eggs and sperm

June 20, 2005

Human embryonic stem cells have been coaxed in the lab to develop into the early forms of cells which eventually become eggs or sperm, UK researchers reveal.

It might one day be to allow people who cannot produce eggs or sperm to have children, by taking cells from their body, deriving embryonic stem cells via therapeutic cloning and then deriving eggs or sperm.

Being able to derive eggs… read more

New model ‘permits time travel’

June 20, 2005

A new model that uses the laws of quantum mechanics gets rid of the famous “grandfather” paradox surrounding time travel.

According to Einstein, space-time can curve back on itself, theoretically allowing travelers to double back and meet younger versions of themselves.

And now a team of physicists from the US and Austria says this situation can only be the case if there are physical constraints acting to protect… read more


June 20, 2005

The line that has long separated human beings from the machines that assist them is blurring as complex technologies become a visible part of people who depend upon them.

Major universities like Carnegie Mellon and the University of California at Berkeley, as well as companies and the United States military, are exploring ways in which people can be enhanced by strapping themselves into wearable robotics, or exoskeletons.

Software Advance Helps Computers Act Logically

June 16, 2005

A new software language, ISO 18629, promises to enable computers to reason much more precisely and thus better reflect subtleties intended by commands of human operators.

ISO 18629 uses AI and language analysis to represent computer commands in the context of a manufacturing plan. Researchers have incorporated approximately 300 concepts, such as “duration” and “sequence,” into its software structure. Computers using software with this expanded, though still primitive AI… read more

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