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ScienceDaily: Top Technology News |
| Scientists discover a new type of infrared polaritons at the surface of bulk crystals Posted: 27 Aug 2021 10:37 AM PDT An international team has reported the observation of ghost polaritons, which are a new form of surface waves carrying nanoscale light strongly coupled with material oscillations and featuring highly collimated propagation properties. |
| Global sand and gravel extraction conflicts with half of UN Sustainable Development Goals Posted: 27 Aug 2021 10:37 AM PDT Sand and gravel are the most mined materials in the world, with between 32 and 50 billion tons extracted globally each year. They are being extracted faster than they can be replaced. But according to a new study, the human and environmental costs of this extraction on lower and middle-income countries have been largely overlooked. |
| Breakthrough in sizing nanoparticles using fluid-filled tubes Posted: 27 Aug 2021 09:15 AM PDT Scientists have discovered that the mass and size of nano-particles can be simultaneously measured by passing the nanoparticles, in their native solution, through an inexpensive and simple mechanical tube. |
| Observing a higher-dimensional topological state with metamaterials Posted: 27 Aug 2021 09:15 AM PDT Linked Weyl surfaces, a novel type of topological phase that exists in five-dimensional space, have now been experimentally observed. The work provides a unique platform for exploring various topological phases, the transition between them, and the corresponding boundary effects in five dimensions. |
| Drones could deliver defibrillators to cardiac arrest victims faster than ambulances Posted: 27 Aug 2021 05:24 AM PDT A feasibility study has found that drones can be used to deliver life-saving defibrillators to people with suspected cardiac arrest in the community. |
| Unravelling the mystery of brown dwarfs Posted: 27 Aug 2021 05:24 AM PDT Brown dwarfs are astronomical objects with masses between those of planets and stars. The question of where exactly the limits of their mass lie remains a matter of debate, especially since their constitution is very similar to that of low-mass stars. So how do we know whether we are dealing with a brown dwarf or a very low mass star? |
| A new model for group decision-making shows how 'followers' can influence the outcome Posted: 26 Aug 2021 02:02 PM PDT From small committees to national elections, group decision-making can be complicated -- and it may not always settle on the best choice. That's partly because some members of the group do research on their own, and others take their cues from the people around them. A new mathematical framework predicts that decision-making groups have a critical threshold of people who get their information from others. Below that threshold, the group chooses the high-quality outcome. Above it, the group can end up choosing the better or worse option. |
| Ultrafast electron microscopy leads to pivotal discovery Posted: 26 Aug 2021 02:02 PM PDT Researchers used ultrafast electron microscopy to study a nanoscale phenomenon that occurs in less than a few hundred quadrillionths of a second. Insights from the study could aid in the development of new sensors and quantum devices. |
| Artificial intelligence re-stained images of tissue biopsy expedite diagnoses Posted: 26 Aug 2021 02:02 PM PDT In lifesaving situations, expedient and accurate diagnostic tools are critical to aid pathologists in examining biopsied tissue samples looking for signs of diseases. Engineers found a new path to achieve that with virtual re-staining of tissue images that is both faster than human-performed special stains and just as accurate. |
| Posted: 26 Aug 2021 02:01 PM PDT Updating the laws, the researchers say, will allow the true value of public resources to be revealed in an environmental market. It will give different groups equal footing in auctions, and create a more stable, actionable path toward conservation, to the benefit of both industry and the environment. |
| Digitally removing clouds from aerial images using machine learning Posted: 26 Aug 2021 08:17 AM PDT Researchers employed generative adversarial networks to more accurately construct datasets for aerial images of building that are obscured by clouds. This work may lead to improved image recognition algorithms. |
| Scientists develop an energy harvesting technology based on ferromagnetic resonance Posted: 24 Aug 2021 07:41 AM PDT Researchers have succeeded in storing electricity with the voltage generated from ferromagnetic resonance (FMR) using a nanometer-thin magnetic film. Exploring the storage characteristics of the commonly used iron-cobalt and iron-nickel alloy thin films, they found that by controlling the thermal conditions of the thin film to be within FMR excitation range, energy can be stored by all the electromagnetic waves that surround us -- including Wi-Fi. |
| Bringing order to chaotic bubbles can make mining more sustainable Posted: 23 Aug 2021 12:10 PM PDT A new way to control the motion of bubbles might one day help separate useful metals from useless dirt using much less energy and water than is currently needed. |
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