It is the waviness of light that limits the resolution of lenses. Apparently, nobody had tried to calculate the imaging of light waves in Maxwell's fish-eye. The new research proves that the fish-eye has unlimited resolution in principle, and, as it does not need negative refraction, it may also work in practice.
Read More
Tuesday, September 29, 2009
New findings could help hybrid, electric cars keep their cool
Understanding precisely how fluid boils in tiny “microchannels” has led to formulas and models that will help engineers design systems to cool high-power electronics in electric and hybrid cars, aircraft, computers and other devices.
Read More
Read More
Ants vs. worms: New computer security mimics nature
In the never-ending battle to protect computer networks from intruders, security experts are deploying a new defense modeled after one of nature's hardiest creatures — the ant.
Unlike traditional security devices, which are static, these "digital ants" wander through computer networks looking for threats, such as "computer worms" — self-replicating programs designed to steal information or facilitate unauthorized use of machines. When a digital ant detects a threat, it doesn't take long for an army of ants to converge at that location, drawing the attention of human operators who step in to investigate.
Read More
Unlike traditional security devices, which are static, these "digital ants" wander through computer networks looking for threats, such as "computer worms" — self-replicating programs designed to steal information or facilitate unauthorized use of machines. When a digital ant detects a threat, it doesn't take long for an army of ants to converge at that location, drawing the attention of human operators who step in to investigate.
Read More
Discovery brings new type of fast computers closer to reality
Physicists at UC San Diego have successfully created speedy integrated circuits with particles called "excitons" that operate at commercially cold temperatures, bringing the possibility of a new type of extremely fast computer based on excitons closer to reality.
Read More
Read More
Cosmic rays hit space age high
Planning a trip to Mars? Take plenty of shielding. According to sensors on NASA's ACE (Advanced Composition Explorer) spacecraft, galactic cosmic rays have just hit a Space Age high.
"In 2009, cosmic ray intensities have increased 19% beyond anything we've seen in the past 50 years," says Richard Mewaldt of Caltech. "The increase is significant, and it could mean we need to re-think how much radiation shielding astronauts take with them on deep-space missions."
Read More
"In 2009, cosmic ray intensities have increased 19% beyond anything we've seen in the past 50 years," says Richard Mewaldt of Caltech. "The increase is significant, and it could mean we need to re-think how much radiation shielding astronauts take with them on deep-space missions."
Read More
Panasonic Develops 50-inch Full HD 3D PDP and High-Precision Active Shutter Glasses
Panasonic Corporation has developed a 50-inch Full HD 3D compatible plasma display panel (PDP) and high-precision active shutter glasses that enable the viewing of theater-quality, true-to-life 3D images in the living rooms. Aiming to bring Full HD 3D TVs to the market in 2010, the company steps up its efforts in developing the related technology.
Read More
Read More
A fuel cell that harvests electricity from glucose and other sugars
A spoonful of herbicide helps the sugar break down in a most delightful way.
Researchers at Brigham Young University have developed a fuel cell – basically a battery with a gas tank – that harvests electricity from glucose and other sugars known as carbohydrates.
The human body’s preferred energy source could someday power our gadgets, cars or homes.
“Carbohydrates are very energy rich,” said BYU chemistry professor Gerald Watt. “What we needed was a catalyst that would extract the electrons from glucose and transfer them to an electrode.”
The surprising solution turned out to be a common weed killer.
Read More
Researchers at Brigham Young University have developed a fuel cell – basically a battery with a gas tank – that harvests electricity from glucose and other sugars known as carbohydrates.
The human body’s preferred energy source could someday power our gadgets, cars or homes.
“Carbohydrates are very energy rich,” said BYU chemistry professor Gerald Watt. “What we needed was a catalyst that would extract the electrons from glucose and transfer them to an electrode.”
The surprising solution turned out to be a common weed killer.
Read More
Avalex partnering with Gyrocam on surveillance system for U.S. Marine Corps
Avalex Technologies is proud to partner with Gyrocam Systems and the U.S. Marine Corps on the Expeditionary FlyAway Rapid Deployment Surveillance System.
These free-standing, portable systems include a telescoping 32-foot mast that can be raised and lowered in minutes. They can be easily deployed at strategic locations, even in the most extreme terrains, and provide a bird's eye view of activity in an area.
Read More
These free-standing, portable systems include a telescoping 32-foot mast that can be raised and lowered in minutes. They can be easily deployed at strategic locations, even in the most extreme terrains, and provide a bird's eye view of activity in an area.
Read More
ISS Could Get its Own Electron-Beam Fabrication 3D Printer
Electron Beam Freeform Fabrication, or EBF3, takes place in a vacuum chamber in which an electron beam is focused on a source of metal that is constantly fed into the beam. The electron beam melts the metal atop a rotating surface, applying the molten feedstock in layers as directed by a detailed 3-D drawing of the object being produced. The process continues until the object is done, rendered completely from drawing to usable metal part.
Read More
Read More
SpaceX successfully tests DragonEye LIDAR on Space Shuttle
Space Exploration Technologies (SpaceX; Hawthorne, CA) announced the successful demonstration of a proximity sensor or laser imaging detection and ranging (LIDAR) sensor called DragonEye, launched aboard NASA's Space Shuttle Endeavour STS-127 mission on July 15th, 2009. DragonEye was tested in proximity of the International Space Station (ISS) in preparation for future visits by SpaceX's Dragon spacecraft.
Photonics Breakthrough for Silicon Chips
Light pressure equals beam power divided by c, the speed of light. A one-milliwatt laser pointer, therefore, presses its object with the force of 3.3 piconewtons.
Why not use light as an actuator, reaching right into the guts of an integrated circuit to throw tiny switches, either to control electronic circuits or, better yet, to reroute light itself, and the data that it carries?
Read More
Why not use light as an actuator, reaching right into the guts of an integrated circuit to throw tiny switches, either to control electronic circuits or, better yet, to reroute light itself, and the data that it carries?
Read More
Hacking DNA
A relatively new oxymoron is synthetic biology, coined by the geneticist Waclaw Szybalski in 1974. Synthetic biology (also called synbio) uses engineering methods to produce something new by treating a living system not so much as a biological entity but as a kind of technology. Hence synthetic biology is also called biological engineering or just bioengineering.
Read More
Read More
The Spaser Nanolaser
n late August, two groups of researchers reported the construction of a new kind of nanometer-scale laser. Surface plasmon resonance nanolasers, or spasers, are the smallest lasers yet made, and their creators say the devices could pave the way toward ultrafast optical computing.
Read More
Read More
The Brain-Machine Interface
Wireless brain-machine interfaces would be much more practical and could be implanted in several different areas of the brain to tap into more neurons. A typical scheme would have electrodes penetrating brain tissue, picking up neuronal electrical impulses, called spikes. A chip would amplify and process the signals and transmit them over a broadband RF connection through the skull to a receiver.
Read More
Read More
Raytheon Delivers First Joint Standoff Weapon C to Australia
aytheon Company (NYSE: RTN) delivered the first Joint Standoff Weapon C to Australia in July for the Royal Australian Air Force's new F/A-18F Hornet fighter aircraft.
In addition to the JSOW C, the RAAF has placed an order for the JSOW C-1, which is currently in production; deliveries will begin in 2010. The JSOW C-1 maintains the land attack capability of JSOW C and adds a moving maritime target capability by incorporating a datalink.
Read More
In addition to the JSOW C, the RAAF has placed an order for the JSOW C-1, which is currently in production; deliveries will begin in 2010. The JSOW C-1 maintains the land attack capability of JSOW C and adds a moving maritime target capability by incorporating a datalink.
Read More
Subscribe to:
Posts (Atom)