Lifeboat Foundation

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When square CSRR cells were cascaded (Fig. 12), a compact SIW circuit was achieved with bandpass response, with low return and insertion losses from 7.2 to 10.0 GHz. This compact bandpass filter has dimensions of 34 × 18 mm² and is formed from three cascaded CSRR cells. It was simulated from 4 to 10 GHz with simulated results of −33.1-dB minimum return loss and 0.3-DB insertion loss at 8.8 GHz (Fig. 13).

The miniature CSRR-loaded SIW bandpass filter shows reasonable insertion and return losses from 7.2 to 9.8 GHz. This technology, of fabricating CSRR cells with SIW transmission lines on low-loss microwave substrate materials, shows great promise for the creation of compact bandpass filters at microwave frequencies.

Continue reading “Split-Ring Resonators Add to SIW Bandpass Filter” »

The new Belarusian-Russian R&D center for laser technologies is supposed to open in Minsk. The center will take care of the most important and new practical applications of laser technologies, said Sergei Bagayev. The scope of research will vary from agricultural applications to using lasers for the advanced processing of oil products to get modern materials.

New phase-change materials make permanent storage up to a thousand times faster.

Georgia Tech researchers have developed a new strategy for crafting one-dimensional cellulose nanorods using a wide range of precursor materials.

Awesome @ my friends at ORNL! Luv it and expect much success too.

No one knows what the next, best way to build electronic circuits will be. That said there’s no shortage of efforts to invent something beyond current lithography. Oak Ridge National Laboratory, perhaps not surprisingly, is in the thick of the race and two recent studies from ORNL researchers showcase promising but very different approaches.

One method suggests phase change in a single complex oxide material may allow “creating” circuit elements much smaller than in today’s CMOS process while a second study puts STEM (scanning transmission electron microscopy) to work directly writing tiny patterns in metallic “ink,” forming features in liquid that are finer than half the width of a human hair. Articles describing both are posted on the ORNL web site.

Continue reading “In Search of the Next Circuit Building Method – ORNL has Ideas” »

Advancing efforts around Synthetic Bio into the semiconductor space.

“We hope that ongoing advances in our method may lead to the development of new organic electronic devices, including semiconductor and luminescent materials,” say Segawa and Itam.

Thiophene-fused polycyclic aromatic hydrocarbons (PAHs) are known to be useful as organic semiconductors due to their high charge transport properties. Scientists have developed a short route to form various thiophene-fused PAHs by simply heating mono-functionalized PAHs with sulfur. This new method is expected to contribute towards the efficient development of novel thiophene-based electronic materials.

Exclusive: When Israel launched a covert scheme to steal material and secrets to build a nuclear bomb, U.S. officials looked the other way and obstructed investigations, as described in a book reviewed by James DiEugenio.

By James DiEugenio

In 1968, CIA Director Richard Helms was presented with a disturbing National Intelligence Estimate (NIE) stating that Israel had obtained atomic weapons, a dangerous development that occurred earlier than the CIA had anticipated.

Spider silk is well-known for its unusual combination of being both lightweight and extremely strong—in some cases, stronger than steel. Due to these properties, researchers have been developing spider-silk-inspired materials for potential applications such as durable yet lightweight clothing, bullet-proof vests, and parachutes.

But so far, the acoustic properties of spider webs have not yet been explored. Now in a new study, a team of researchers from Italy, France and the UK has designed an acoustic metamaterial (which is a material made of periodically repeating structures) influenced by the intricate spider web architecture of the golden silk orb-weaver, also called the Nephila spider.

“There has been much work in the field of metamaterials in recent years to find the most efficient configurations for wave attenuation and manipulation,” coauthor Federico Bosia, a physicist at the University of Torino in Italy, told Phys.org. “We have found that the spider web architecture, combined with the variable elastic properties of radial and circumferential silk, is capable of attenuating and absorbing vibrations in wide frequency ranges, despite being lightweight.”

Continue reading “Sound-proof metamaterial inspired by spider webs” »

My friends at ORN setting records again.

Researchers at the Oak Ridge National Laboratory broke a world record for the largest solid 3D-printed item with its trim-and-drill tool. The item, which is practically the size of a large SUV, took 30 hours to print using carbon fiber and composite plastic materials.

Continue reading “Oak Ridge Just Entered Record Books With The Largest 3D-Printed Object in the World” »