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Technology Blog From Networlddirectory

added: Mon, 27th February 2006 | 468 views | 0x in favourites
feed url: http://www.networlddirectory.com/blogs/rss/technology-b...

Technology Blog From Networlddirectory

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New Nano Technique Significantly Boosts Boiling Efficiency

Whoever penned the old adage "a watched pot never boils" surely never tried to heat up water in a pot lined with copper nanorods. A new study from scientists at Rensselaer Polytechnic Institute shows that by adding an invisible layer of the nanomaterials to the bottom of a metal vessel, an order of magnitude less energy is mandatory to bring water to boil. This increase in efficiency could have a big impact on cooling computer chips, improving heat transfer systems, and reducing costs for industrial boiling applications........

Quantum computing breakthrough

The odd behavior of a molecule in an experimental silicon computer chip has led to a discovery that opens the door to quantum computing in semiconductors. In a Nature Physics journal paper currently online, the scientists describe how they have created a new, hybrid molecule in which its quantum state can be intentionally manipulated - a mandatory step in the building of quantum computers........

3-D Nanostructures with Magnetic Materials

Materials researchers at the National Institute of Standards and Technology (NIST) have developed a process to build complex, three-dimensional nanoscale structures of magnetic materials such as nickel or nickel-iron alloys using techniques compatible with standard semiconductor manufacturing. The process, described in a recent paper,* could enable whole new classes of sensors and microelectromechanical (MEMS) devices........

A look into the nanoscale

Lawrence Livermore National Laboratory scientists have captured time-series snapshots of a solid as it evolves on the ultra-fast timescale. Using femtosecond X-ray free electron laser (FEL) pulses, the team, led by Anton Barty, is able to observe condensed phase dynamics such as crack formation, phase separation, rapid fluctuations in the liquid state or in biologically relevant environments........

Light-Driven Reversible Nanoswitches

The ability to see is based on molecules in the eye that flip from one conformation to another when exposed to visible light. Now, a new technique for attaching light-sensitive organic molecules to metal surfaces allows the molecules to be switched between two different configurations in response to exposure to different wavelengths of light. Because the configuration changes are reversible and can be controlled without direct contact, this technique could enable applications that can be controlled at the molecular scale........

Interfering with the Global Positioning System

You can't always trust your GPS gadget. As researchers have long known, perplexing electrical activity in the upper atmospheric zone called the ionosphere can tamper with signals from GPS satellites. Now, new research and monitoring systems are clarifying what happens to disruptive clouds of electrons and other electrically charged particles, known as ions, in the ionosphere. The work may lead to regional predictions of reduced GPS reliability and accuracy........

Prototype Hydrogen Storage Tank

A cryogenic pressure vessel developed and installed in an experimental hybrid vehicle by a Lawrence Livermore National Laboratory research team can hold liquid hydrogen for six days without venting any of the fuel. Unlike conventional liquid hydrogen (LH2 tanks in prototype cars, the LLNL pressure vessel was parked for six days without venting evaporated hydrogen vapor........

Robots go Where Scientists Fear to Tread

Researchers are diligently working to understand how and why the world's ice shelves are melting. While most of the data they need (temperatures, wind speed, humidity, radiation) can be obtained by satellite, it isn't as accurate as good old-fashioned, on-site measurement and static ground-based weather stations don't allow researchers to collect info from as a number of locations as they'd like........

Nanotechnology for Dummies

Don't you just love the "for dummies" series? I hope the title doesn't personally offend anyone. I'm not calling anyone a dummy. I just like the book series. .........

Researchers Create Superior Polymer

Scientists at Northwestern University and Princeton University have created a new kind of polymer that, because of its extraordinary thermal and mechanical properties, could be used in everything from airplanes to solar cells. The polymer, a nanocomposite that incorporates functionalized, exfoliated graphene sheets, even conducts electricity, and scientists hope to use that property to eventually create thermally stable, optically transparent conducting polymers........

Mid-Infrared Lasers Show Doubled Efficiency

Scientists at the Center for Quantum Devices at the McCormick School of Engineering at Northwestern University have recently doubled the efficiency of infrared lasers under the U.S. Defense Advanced Research Projects Agency's Efficient Mid-wave Infrared Lasers (EMIL) program. As these types of lasers become more efficient, they could be used in next-generation laser-based defense systems to fool incoming missile attacks or detect explosives or toxins in the atmosphere. Such lasers could also be used in commercial applications like trace chemical analysis, pollution monitoring, and free space communication........

Nanosoccer Robots in Action in Pittsburgh

Nanosoccer returns to the field later this month, when the National Institute of Standards and Technology (NIST) hosts for the second time the world's most Lilliputian sport. Three student teams will participate in a public exhibition at the 2008 U.S. "RoboCup Open" in Pittsburgh, Pa., May 25 to 27, where miniature "soccer players"-computer-driven robots six times smaller than an amoeba operating on a field the size of a grain of rice-will show off their skills........

Gravity-defying bird beak mystery

As Charles Darwin showed nearly 150 years ago, bird beaks are exquisitely adapted to the birds' feeding strategy. A team of MIT mathematicians and engineers has now explained exactly how some shorebirds use their long, thin beaks to defy gravity and transport food into their mouths. The phalarope, commonly found in western North America, takes advantage of surface interactions between its beak and water droplets to propel bits of food from the tip of its long beak to its mouth, the research team reports in the May 16 issue of Science........

Evolution of "gas giants"

By shooting the high-energy Omega laser onto precompressed samples of planetary fluids, researchers are gaining a better understanding of the evolution and internal structure of Jupiter, Saturn and extrasolar giant planets. The properties of dense helium (He) - which happens to be a principal constituent of giant gas planets like Jupiter - at thermodynamic conditions between those of condensed matter and high-temperature plasmas are theoretically challenging and unexplored experimentally........

Pressure Effects On Nanomaterials

Transistors, lasers and solar-energy conversion devices may be easier to manipulate because of recent research by Lawrence Livermore National Laboratory scientists. The scientists defined the role high pressure plays in precisely tuning the fundamental properties of nanomaterials and, in particular, nanoparticle assemblies that are important for device applications........

Designer Isotopes Push the Frontier of Science

Designer labels have a lot of cachet, a principle that's equally true in fashion and physics. The future of nuclear physics is in designer isotopes--the relatively new power researchers have to make specific rare isotopes to solve scientific problems and open doors to new technologies, as per Bradley Sherrill, a University distinguished professor of physics and associate director for research at the National Superconducting Cyclotron Laboratory (NSCL) at Michigan State University (MSU)........

Heat transfer between materials

Managing heat is a major challenge for engineers who work on devices from jet engines to personal electronics to nano-scale transistors. A team led by a University of Michigan mechanical engineer has received a five-year, $6.8-million grant from the Air Force to examine this problem, which is a barrier to more powerful, efficient devices........

Mini-Origami: ISI Folds Up Tiny Packages for Drug Delivery

Scientists at the USC Information Sciences Institute have demonstrated a way to manufacture miniscule containers that might be used to deliver precise micro- or even nano- quantities of drugs. As per ISI project leader Peter Will, who is a research professor in the Viterbi School of Engineering, the new technique, described in a paper in the Journal of Micromechanics and Microengineering, is a two-step process........

New 3-D test method for biomaterials 'flat out' faster

A novel, three-dimensional (3-D) screening method for analyzing interactions between cells and new biomaterials could cut initial search times by more than half, scientists from the National Institute of Standards and Technology (NIST) and Rutgers University report in the new issue of Advanced Materials.* The technique, an advance over flat, two-dimensional screening methods, enables rapid assessment of the biocompatibility and other properties of materials designed for repairingor even rebuildingdamaged tissues and organs........

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