Data collected from the Gemini South telescope in Chile has shed light on a nearly-200-year-old stellar eruption.
Gemini spectroscopy shows that ejected material from the blast was the fastest ever seen from a star that remained intact.
Continue reading “Astronomers Finally Understand 170-Year-Old Stellar Eruption” »
The Defense Advanced Research Projects Agency (DARPA) has selected the teams for two research programs that the agency hopes will provide technologies to transcend the limits of Moore’s Law.
As part of DARPA’s $1.5 billion Electronics Resurgence Initiative (ERI) to “jumpstart innovation in the electronics industry,” the Three Dimensional Monolithic System-on-a-Chip (3DSoC) program and the Foundations Required for Novel Compute (FRANC) program are focused on developing chip-level innovations that lead to more powerful and efficient computing systems. We reported on both programs last September, just after they were announced.
Last week, during DARPA’s first ERI Summit in San Francisco, the agency revealed the research teams selected to drive each of these efforts. For the 3DSoC program, groups from the Georgia Institute of Technology, Stanford University, Massachusetts Institute of Technology, and Skywater Technology Foundry were tapped. The corresponding research teams for the FRANC program will come from HRL Laboratories; Applied Materials, Inc.; Ferric, Inc.; the University of California, Los Angeles; the University of Minnesota; and the University of Illinois at Urbana-Champaign.
Continue reading “DARPA Picks Research Teams for Post-Moore’s Law Work” »
Lithium-ion batteries are effective, but they can be a bit on the expensive side. Striking a balance between common materials and efficiency is important, and regular old salt looks like it could fit the bill – after a few kinks are ironed out. Now, researchers at King Abdullah University of Science and Technology (KAUST) have developed a way to make “disordered” graphene that can help improve the sodium-ion battery recipe.
Silicon is the king of the computing world. Almost all commercial integrated circuits have been based on silicon and, for the most part, on a single basic process called complementary metal oxide (CMOS).
But the end of silicon may be in sight. Even industry giant IBM acknowledges that silicon’s days are numbered. But why? And what’s going to replace it?
There is a whole raft of new materials and partial replacements for silicon in the offing. But I could have written that very sentence two decades ago—maybe even as far back as 1980. Yet silicon remains dominant.
When it comes to new materials, thin is most definitely in. Brazilian researchers have created a new two-dimensional material called hematene, which is made up of sheets of iron ore just three atoms thick. And as is often the case with 2D materials, hematene seems to have different properties to its regular form.
According to engineers, root vegetables aren’t only good for the body. Their fibres could also help make concrete mixtures stronger and more eco-friendly.
Construction projects have a significant impact on our environment. To combat this, stakeholders in the academic and industrial sectors have been looking for ways to make the industry more environment friendly. The EU-funded project B-SMART will be contributing to these efforts by focusing on concrete and the more culpable of its ingredients: cement.
Led by Lancaster University in the United Kingdom, the project will be investigating how nanoplatelets extracted from the fibres of root vegetables can make concrete mixtures more robust and more environment friendly. So far, initial tests have shown that adding nanoplatelets from sugar beet or carrot to these mixtures greatly enhances the mechanical properties of concrete.
Spacecraft outfitted with sails and propelled by the sun are no longer the stuff of science fiction or theoretical space missions. Now, a Rochester Institute of Technology researcher is taking solar sailing to the next level with advanced photonic materials.
Metamaterials—a new class of manmade structures with unconventional properties—could represent the next technological leap forward for solar sails, according to Grover Swartzlander, professor in RIT’s Chester F. Carlson Center for Imaging Science. He proposes replacing reflective metallic sails with diffractive metafilm sails. The new materials could be used to steer reflected or transmitted photons for near-Earth, interplanetary and interstellar space travel.
“Diffractive films may also be designed to replace heavy and failure-prone mechanical systems with lighter electro-optic controls having no moving parts,” he said.
Ionic Materials received an investment from Hyundai Cradle. Ionic Materials has a polymer electrolyte that can make higher performing and safer solid-state batteries. Prototype batteries with Ionic Materials’ solid plastic electrolyte can enable higher energy densities at low cost.
Properties of Ionic Materials polymer
Up to 1.3 mS/cm at room temperature Lithium transference number of 0.7 High voltage capability (5 volts) Can accommodate high loadings in the cathode High elastic modulus Low cost precursors Stable against Lithium Conducts multiple ions.
There are claims of synthesis of a room temperature superconductor. However, these claims have not been officially accepted by scientific communities. Currently, the highest transition temperature (Tc) recognized in scientific articles is 135 K at 1 atm of Hg-Ba-Ca-Cu-O system which is a copper oxide superconductor. We packed graphite flakes into a ring-shaped polytetrafluoroethylene (PTFE) tube and further injected heptane or octane. Then we generated circulating current in this ring tube by electromagnetic induction and showed that this circulating current continues to flow continuously at room temperature for 50 days. This experiment suggests that bringing alkane into contact with graphite may result in a material with zero resistance at room temperature.
