science + technology news

The Bleeding Edge of Computing

March 7, 2005

Tomorrow’s computing landscape may include trinary rather than binary coding, DNA computers, and wearable computers that act as a virtual assistant who helps us on a second-by-second basis.

First Evidence For Entanglement of Three Macroscopic Objects

March 4, 2005

First evidence for entanglement of three macroscopic objects has been seen in a superconducting circuit built at the University of Maryland.

By examining an electrical circuit operating at temperatures near absolute zero, the researchers have found new evidence that the laws of quantum mechanics apply not just to microscopic particles such as atoms and electrons, but also to large electronic devices called superconducting quantum bits (qubits).

Superconducting circuits… read more

Brain reconstruction hints at ‘hobbit’ intelligence

March 4, 2005

Analysis of the diminutive cranium of Homo floresiensis – a one-meter-tall hobbit-like human that lived in Indonesia just 13,000 years ago – confirms it as a unique species and that it has advanced morphological features, including ones associated with complex brain processes in living humans.

Penrose: The Answer’s Not 42

March 3, 2005

Roger Penrose’s newly published The Road to Reality: A Complete Guide to the Laws of the Universe is a rigorous and exhaustive map to the “theory of nearly everything.”

Among his controversial ideas: Penrose proposes that the missing link between macroscopic and submicroscopic is gravity. Aggregations of particles exist in their blurry quantum mechanical states until so many particles are both here and there that space-time itself — which… read more

Barrett: No end in sight for Moore’s Law

March 2, 2005

Moore’s Law will boost chip abilities for many years to come, Intel CEO Craig Barrett predicted on Tuesday.

Barrett predicted that traditional chipmaking technology will permit features as small as 5 nanometers–about the width of 50 hydrogen atoms–to be used on processors.

He mentioned three options for replacing conventional CMOS technology: quantum dot, polymer layer, and nanotubes.

Powerful quantum computer made with superconducting ‘artificial atoms’ is possible

March 2, 2005
Optical micrograph showing an "artificial atom" made with a superconducting circuit. The red arrow points to the heart of the qubit -- the Josephson junction device that might be used in a future quantum computer to represent a 1, 0, or both values at once.

Two superconducting devices have been coaxed into a special, interdependent state that mimics the unusual interactions sometimes seen in pairs of atoms, an important step toward the possible use of “artificial atoms” made with superconducting materials for storing and processing data in an ultra-powerful quantum computer of the future.

Research using real atoms as qubits has advanced rapidly, but superconducting circuits offer the advantage of being easily… read more

‘DNA wires’ promise future self-assembling computer devices

March 2, 2005

“DNA wires” may lead to low-cost, self-assembling devices for future computers.

Purdue University researchers brought together magnetic nanoparticles and DNA in solution, causing the DNA to be coated with the magnetic nanoparticles and forming a conductive “DNA wire.” They then used a BamH1 “restriction enzyme” to cause the DNA wire to be snipped in specific smaller lengths.

Because hundreds of different restriction enzymes snip segments containing specific sequences… read more

Engineers devise invisibility shield

March 1, 2005

A “plasmonic cover” could theoretically render objects “nearly invisible to an observer,” say University of Pennsylvania engineers.

A plasmonic screen suppresses scattering by resonating in tune with the illuminating light. Plasmons are waves of electron density, caused when the electrons on the surface of a metallic material move in rhythm. The researchers say that a shell of plasmonic material will scatter light negligibly if the light’s frequency is close… read more

Alternate Reality Video Games Blur Many Lines

March 1, 2005

“Alternate-reality gaming” — an obsession-inspiring genre that blends real-life treasure hunting, interactive storytelling, coded web sites, video games and online community — may, incidentally, be one of the most powerful guerrilla marketing mechanisms ever invented.

Cycorp: The Cost of Common Sense

February 28, 2005

The time may come, Cycorp CEO Doug Lenat says, when a greatly expanded Cyc will underlie countless software applications. But reaching that goal could easily take another two decades.

Mind Control

February 28, 2005

The BrainGate Neural Interface creates a direct link between a person’s brain and a computer, translating neural activity into action. Matthew Nagle, without use of his limbs but fitted with a BrainGate, can now play a videogame or change channels on TV using only his mind.

Rewiring The Body

February 28, 2005

Exotic implants are bringing new hope to victims of epilepsy, paralysis, depression, and other diseases.

Profile: Patrick Moore

February 28, 2005

Ex-Greenpeace activist turned biotech supporter believes that auditing the performance of biotech products is the only way to convince people of their value.

(Free-access article)

Startup uses tiny probes to store data

February 28, 2005

Nanochip Inc. has developed prototype arrays of atomic-force probes, tiny instruments used to read and write information at the molecular level and hopes to offer its first product by mid-2007. These arrays can record up to one terabit in a single square inch.

That’s the storage density that magnetic hard disk drive makers hope to achieve by 2010. It’s roughly equivalent to putting the contents of 25 DVDs on… read more

Robotics In War: Technology v. morality

February 25, 2005

We are all but ready to build robots to fight our wars but far from prepared to resolve the cadre of attendant ethical questions.

It’s perfectly logical to put machines at risk before humans, clearing minefields and performing guard duty in hostile locales. But if war can be fought virtually without loss of human soldiers’ lives, it could jumble the entire strategic and political calculus of war.

close and return to Home