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Linked quantum dots could create cheap, efficient solar cells

September 30, 2011

Pictured are self-assembled binary superlattices of two different kinds of quantum dots. The controllable and ordered interface between the different semiconductor nanocrystals presents a very promising system for use as efficient, solution processable solar cells. (credit: TU Delft)

Researchers at the Kavli Institute of Nanoscience at TU Delft in the Netherlands have demonstrated that electrons can move freely in layers of linked semiconductor nanoparticles under the influence of light  in a breakthrough that could lead to cheaper, more-efficient solar cells made from quantum dots.

Right now, crystalline silicon solar panels are expensive to produce, said the researchers, led by TU Delft Assistant Professor… read more

Program detects tiny differences in images

August 13, 2003

Scientists at the U.S. Department of Energy’s Idaho National Engineering and Environmental Laboratory have developed a program that detects slight differences between digital images that signal early stages of disease.

The program aligns images, to within a fraction of a pixel, from hand-held or otherwise imprecise cameras. The alignment compensates for differences in camera angle, height, zoom or other distractions that previously confounded comparisons. There are also a variety… read more

Apple’s Next Media Frontier Will Be Streaming Video

December 11, 2009

Building a data center, putting a video camera on the iPhone and iPod Nano, and now, approving iPhone apps with live video-streaming functionality will allow Apple to build for an always-connected, share-everything future, with personal broadcasting.

Carpet bombing in cyberspace

May 13, 2008

“America needs a network that can project power by building an af.mil robot network (botnet) that can direct such massive amounts of traffic to target computers that they can no longer communicate and become no more useful to our adversaries than hunks of metal and plastic,” says Col. Charles W. Williamson III, judge advocate, Air Force Intelligence, Surveillance and Reconnaissance Agency.

Proposals he cites include:

  • Mount botnet
  • read more

    How Important Are Computers in Your Life? E-Mail Us

    June 29, 2006

    ABC News is currently producing a report looking at the increasing power and importance of technology in our lives and the future of artificial intelligence.

    “We want to know how important you think technology is to our world. What would your life be like if computers suddenly disappeared? Can you imagine a world without PCs, IPods, ATMs, cellular phones or the Internet? Do you believe computers will achieve the… read more

    Fishing for Information? Try Better Bait

    August 21, 2003

    “Google Hacks: 100 Industrial-Strength Tips and Tools,” by Tara Calishain and Rael Dornfest (O’Reilly & Associates), is the latest resource in a growing industry to help people become better online searchers. It catalogs ways to uncover nuggets of information.

    Other rich sources include resourceshelf.freepint.com, searchengineshowdown.com, searchenginewatch.com, and www.researchbuzz.com.

    Diet high in methionine could increase risk of Alzheimers

    December 17, 2009

    A diet rich in methionine, an amino acid typically found in red meats, fish, beans, eggs, garlic, lentils, onions, yogurt and seeds, can possibly increase the risk of developing Alzheimer’s disease, according to a study by Temple University researchers.

    Man-made ‘defensin’ rips resistant bacteria

    May 19, 2008

    University of Pennsylvania researchers have built artificial defensin molecules, the proteins used by white blood cells to punch holes in bacteria and kill them.

    These small molecules are electrically attracted to a bacterium’s outer membrane, and fuse with it to make the holes. Bacteria cannot easily evolve resistance to defensins’ physical damage to their complex membranes, unlike antibiotics (where bacteria can evolve resistance through a simple change that blocks… read more

    Researchers create a broadband light amplifier on a chip

    July 10, 2006

    Cornell researchers have created a broadband light amplifier on a silicon chip, a major breakthrough in the quest to create photonic microchips.

    The amplifier uses a phenomenon known as four-wave mixing, in which a signal to be amplified is “pumped” by another light source inside a very narrow waveguide. The waveguide is a channel only 300 x 550 nanometers (nm = a billionth of a meter, about the length… read more

    Researchers do precise gene therapy without a needle

    October 17, 2011

    Uncoiling DNA strands form precise patterns, a prelude to biologically based electronics and medical devices (credit: Ohio State University)

    L. James Lee and his colleagues at Ohio State University have successfully inserted specific doses of an anti-cancer gene into individual leukemia cells to kill them without a needle. The technique uses electricity to “shoot” bits of therapeutic biomolecules through a tiny channel and into a cell in a fraction of a second.

    They have dubbed the method “nanochannel electroporation” (NEP).… read more

    Nanotechnology: Atom and Eve in the Garden of Eden

    August 29, 2003

    K. Eric Drexler, founder and chairman of the Foresight Institute, will debate Patrick R. Mooney, head of the ETC Group, on potential hazards of nanoscale materials for human health and the environment at the Beyond Borders retreat in Ottawa on Sept. 22.

    The ETC Group has issued a report warning of such hazards.

    Efficient new wireless system can save 10 percent of bandwidth

    December 23, 2009

    A Syracuse University scientist has invented a new technology for handling wireless traffic that could provide wireless companies a gain of up to 10 percent in bandwidth, enabling them to support many more subscribers with the same amount of bandwidth.

    ‘Grasshopper’ robot sets high-jump record

    May 22, 2008

    Taking its inspiration from the grasshopper, a tiny two-legged robot
    that stores elastic energy in springs has leaped 27 times its own height.

    Developed by researchers at the Swiss Federal Institute of Technology, it provides an effective way for tiny robots to get around on rough terrain.

    They hope to add solar panels, some simple sensors and a microprocessor. These would allow the robot to control its hopping… read more

    Brainy Robots Start Stepping Into Daily Life

    July 18, 2006

    A half-century after the term “artificial intelligence” was coined, both scientists and engineers say they are making rapid progress in simulating the human brain, and their work is finding its way into a new wave of real-world products.

    Real-life inception: Army looks to ‘counteract nightmares’ with digital dreams

    October 26, 2011
    Power dreaming

    In an Army-backed experiment called “Power Dreaming,” Naval Hospital Bremerton in Washington State will help traumatized troops battle their nightmares — with soothing, digitally-made dreams crafted in virtual worlds, Wired Danger Room reports.

    The project is a form of biofeedback therapy, in which a PTSD sufferer is fed real-time data on his physical stress levels so that he can be cued to calm down. If he successfully… read more

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