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

Lenovo G50 & CentOS 7.2 MATE - Fairly solid

Is there a perfect track record for any which distro? No. Do any two desktop environments ever behave the same? No. Is there anything really good and cool about the MATE offering? Yes, definitely. It's not the finest, but it's definitely quite all right. You do get very decent hardware support, adequate battery life and good performance, smartphone and media support is top notch, and your applications will all run happily. On the other hand, you will struggle with Samba and Bluetooth, and there are some odd issues here and there. I think the Gnome and Xfce offerings are better, but MATE is not to be dissed as a useless relic. Far from it, this is definitely an option you ought to consider if you're into less-than-mainstream desktops, and you happen to like CentOS. To sum it all up, another goodie in the growing arsenal of CentOS fun facts. Enjoy. Read more

digiKam 5.2.0 is published...

After a second release 5.1.0 published one month ago, the digiKam team is proud to announce the new release 5.2.0 of digiKam Software Collection. This version introduces a new bugs triage and some fixes following new feedback from end-users. This release introduce also a new red eyes tool which automatize the red-eyes effect reduction process. Faces detection is processed on whole image and a new algorithm written by a Google Summer of Code 2016 student named Omar Amin is dedicated to recognize shapes and try to found eyes with direct flash reflection on retina. Read more

Games for GNU/Linux

Linux Graphics