Language Selection

English French German Italian Portuguese Spanish

Useful cloaking device is one step closer to reality

Filed under
Sci/Tech

Last October saw a major breakthrough in an area of research that, until very recently, was squarely in the realm of science fiction—cloaking technology.

An article published in Science by a team of researchers at Duke University discussed how they had created a device that was able to cloak simple objects from microwave radiation.

While this was a stunning announcement, it wasn't what many Trekkies would think of off the top of their head. The Duke team used metamaterials—synthetic materials whose physical structure interacts with electromagnetic (EM) waves in ways that natural materials do not—to essentially guide microwave radiation at a given frequency around a cavity that held the object. If one looked at it, they would still clearly see the entire setup as microwaves have a much longer wavelength than visible light. Another shortcoming was that while the cloak kept the material invisible from outside viewing, it did nothing to keep EM radiation originating from inside the cavity from getting out. This means that anything emitting EM radiation—heat from a person's body, RF signals from a cell phone/radio, or even a simple flashlight—would be instantly detectable. Now, some new mathematics suggests a way one can get around this issue.

Full Story.

More in Tux Machines

pfSense 2.3.2 Open Source BSD Firewall Distro Arrives with over 70 Improvements

Electric Sheep Fencing LLC, through Chris Buechler, proudly announced on July 25, 2016, the immediate availability for download of the second maintenance update aimed at the pfSense 2.3 series of the FreeBSD-based open-source firewall distribution. Read more

Open is the solution to improving 21st century education

Much of the Internet runs Linux and open source software, yet in most of our schools—whether PK-12 or higher education—Linux and open source software are given short shrift. Linux has made serious inroads on hand-held devices, the desktop, and the Internet of things (IoT) that use platforms such as Raspberry Pi, Galileo, and Arduino. Despite this astounding growth, a relatively small number of secondary and post-secondary schools offer technology training that prepares students for increasingly in-demand technical skills. The growth of the maker movement and the concurrent interest in STEM skills, which include coding and ethical hacking, may provide a much-needed impetus to change this trend. Read more

Dale Raby: How do you Fedora?

Dale started using Linux around 1999 when he became disconcerted with his Windows 95 computer and a young clerk in an office supply store told him about Linux. “I started reading some of the magazines, most notably Maximum Linux and eventually got to know their senior editor, Woody Hughes and Show Me the Code columnist Mae Ling Mak,” said Raby. His first distribution was Mandrake 6.5 which came in a box with a boot floppy. Raby manages a small gun shop in Green Bay, Wisconsin. He is also an author with four published books: The Post-Apocalyptic Blacksmith, 777 Bon Mots for Gunslighers and Other Real Men, The Wives of Jacob I, and In the Beginning. Read more

Ubuntu GNOME 16.04.1 LTS Released but Still Doesn't Uses the GNOME 3.20 Stack

As we reported last week, Canonical published the first point release of its long-term supported Ubuntu 16.04 LTS (Xenial Xerus) operating system, offering users new installation mediums with all the updates made available since April 21, 2016. Read more