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posted in October 2006

13 items
NIST demos quantum atom entanglement
News & Analysis  
10/30/2006   Post a comment
The National Institute of Standards and Technology (NIST) has demonstrated error-free quantum communication by pairs of entangled atoms, promising secure quantum computers.

Cloaking experiment taps split-ring resonators
News & Analysis  
10/30/2006   Post a comment
As recently as this summer, invisibility cloaks were only a theoretical possibility. Now the world's first cloaking demonstration has bent microwaves around a 7.2-cubic-inch enclosure, effectively hiding it from detection. The proof of concept suggests how engineers might pattern split-ring resonators to create "designer" metamaterials.

Science learns why size matters in capacitors
News & Analysis  
10/23/2006   Post a comment
If you look at the surface-mounted components on a typical printed-circuit board, the large ones are likely to be the capacitors. For reasons that were not previously verified, the smaller a capacitor gets, the less capacitance it exhibits, often necessitating the use of larger capacitors to achieve the desired capacitance.

Self-isolating nanoparticles eyed for storage
News & Analysis  
10/23/2006   Post a comment
Supercomputer simulations running in the trillions of operations per second provide a virtual test tube for the nanoparticles to be used in a new generation of magnetic media for tomorrow's hard-disk drives. To prove that point, researchers at the Pittsburgh Supercomputing Center and Oak Ridge National Laboratory recently modeled a promising nanoparticle material exhibiting a hitherto hidden capability that the researchers say could enable densities of 1 terabit/square inch.

Quantum effects quell resonating bar
News & Analysis  
10/23/2006   Post a comment
Quantum mechanics predicts that measurements motivate mass--that the act of observing can affect the observed. Now a former National Security Agency scientist turned physics professor has demonstrated that motion can be elicited and quelled by quantum-level observations.

MEMS eyes quartz crystal apps
Product News  
10/23/2006   Post a comment
The last holdout against the microminiaturization of electronics--the quartz crystal--may be set to fall. Wielding oscillators based on microelectromechanical-system technology, two startups aim to break quartz crystals' monopoly on the mechanical time references used in virtually all electronic devices today. If the two are successful, larger competitors with established MEMS programs could be hot on their heels.

Duke takes wraps off cloaking device
News & Analysis  
10/19/2006   Post a comment
Duke University took the wraps off invisibility cloaks, announcing that researchers managed to cloak a five-inch-square area from microwave detection.
Quantum entanglement demonstrated
News & Analysis  
10/19/2006   Post a comment
The National Institute of Standards and Technology said it has demonstrated what it claims is the world's first entangled atoms that could be used to communicate information nondestructively.
Secure comms ride Internet stealth channel
News & Analysis  
10/16/2006   Post a comment
A secret communications channel hidden beneath the noise floor of existing Internet public fiber-optic networks could serve as a conduit for uncrackable data transmission, electrical engineers from Princeton University said last week. Even the presence of data in the stealth channel is hidden; it's impossible to know that anything is being transmitted.

'Backwards' approach leads to 1-pixel camera
Design How-To  
10/16/2006   Post a comment
Remember how digital converters for audio started out at 8 bits, then went to 16 and 24 bits before resetting to 1 bit with oversampling? Engineers at Rice University will propose this week that we reset our megapixel cameras to 1 pixel and our video cameras to 1 voxel, both with oversampling.

Technique brings high-def 3-D to small screen
Product News  
10/9/2006   Post a comment
If you've seen any of the new IMAX 3-D movies, you surely noticed the jump in quality over the 3-D experience of yesteryear. Now a 3-D display maker has tapped an encoding technology that reproduces that cinematic experience on a 19-inch LCD for scientific visualization and medical diagnostics.

Encryption technology makes quantum leap
News & Analysis  
10/2/2006   Post a comment
Using a superconducting detector, the National Institute of Standards and Technology has set a new world's distance record in quantum-key distribution--an uncrackable encryption technology that ensures absolute security by harnessing the quantum-physics principle that observations affect outcome. Until last week, Toshiba Research Europe Ltd. and Cambridge Research Laboratory held the record for the most sensitive detector with a prototype system that stretched 75 miles. Now NIST has upped the an
UWB scheme banishes the delay line
News & Analysis  
10/2/2006   Post a comment
A new breed of ultrawideband radio that uses a mixer instead of a delay line could solve longstanding deployment problems, its developers say. The technique, invented by engineers at the University of Massachusetts (Amherst), was unveiled last week at the International Conference on Ultra-Wideband in Waltham, Mass.

As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

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