A team led by Prof. GUO Guangcan and Prof. ZOU Changling from the University of Science and Technology of China of the Chinese Academy of Sciences realized efficient frequency conversion in microresonators via a degenerate sum-frequency process, and achieved cross-band frequency conversion and amplification of converted signal through observing the cascaded nonlinear optical effects inside the microresonator. The study was published in Physics Review Letters. Coherent frequency conversion process has wide application in classical and quantum information fields such as communication, detection, ...

A new study conducted jointly by the University of Liege (Belgium) and the Ecole normale superieure - PSL (France) shows that heart brain interactions, measured using electroencephalography (EEG), provide a novel diagnostic avenue for patients with disorders of consciousness. This study is published in the Journal of Neuroscience. Catherine Tallon-Baudry (ENS, CNRS) introduces : "The scientific community already knew that in healthy participants, the brain's response to heartbeats is related to perceptual, bodily and self-consciousness. We now show that we can obtain clinically meaningful information if we probe this interaction in ...

Networks offer a powerful way to visualize and analyze complex systems. However, depending on the size and complexity of the network, many visualizations are limited. Protein interactions in the human body constitute such a complex system that can hardly be visualized. Jörg Menche, Adjunct Principal Investigator at the CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Professor at the University of Vienna and research group leader at Max Perutz Labs (Uni Wien/MedUni), and his team developed an immersive virtual reality (VR) platform that solves ...

Software using artificial intelligence, AI, is revolutionizing how microscopy images are analysed. For instance, AI can be used to detect features in images (i.e., tumours in biopsy samples) or improve the quality of images by removing unwanted noise. However, non-experts continue to find AI technologies difficult to use. In the article "Democratising deep learning for microscopy with ZeroCostDL4Mic", published in Nature Communications on 15 April 2021, researchers describe a platform called ZeroCostDL4Mic, which makes these AI technologies accessible to everyone. "The key novelty is that ZeroCostDL4Mic runs in the cloud for free and does not ...

In the brain, more than a hundred molecular substances act as transmitters that control communication pathways between nerve cells via thousands of different receptor types. In a review article, an international research team discusses how the activation of certain nerve cell receptors affects neuronal networks in the brain. The authors from Ruhr-Universität Bochum (RUB), Pompeu Fabra University in Barcelona and Oxford University present concepts to quantify receptor-specific modulations of brain states. They have also developed a computer model that can predict the impact of individual receptor types on brain activity. In addition, the researchers show how the predictions obtained in the computer can be verified and refined by experimental methods. They hope this will lead to new ...

A group of University of Wyoming professors and students has identified an unusual belt of igneous rocks that stretches for over 2,000 miles from British Columbia, Canada, to Sonora, Mexico. The rock belt runs through Idaho, Montana, Nevada, southeast California and Arizona. "Geoscientists usually associate long belts of igneous rocks with chains of volcanoes at subduction zones, like Mount Shasta, Mount Hood, Mount St. Helens and Mount Rainer," says Jay Chapman, an assistant professor in UW's Department of Geology and Geophysics. "What makes this finding so interesting and mysterious is that this belt ...

NEW YORK, NY--A new imaging technique developed by scientists at Columbia University Vagelos College of Physicians and Surgeons and St. Jude Children's Research Hospital captures movies of receptors on the surface of living cells in unprecedented detail and could pave the way to a trove of new drugs.  The researchers used the technique to zoom in on individual receptor proteins on the surface of living cells to determine if the receptors work solo or come together to work as pairs. This work appeared in the April issue of Nature Methods. "If two different receptors come together to form a dimer with distinctive function and pharmacology, this might allow for a new generation of drugs with greater specificity and reduced side effects," says Jonathan ...

Sophia Antipolis - 23 April 2021: A study of 2.4 million hospitalised cannabis users has found that those with an arrhythmia were 4.5 times more likely to die while in hospital than those without. The research is presented at EHRA 2021, an online scientific congress of the European Society of Cardiology (ESC).1 "People should be aware of this devastating outcome and be careful when using cannabis if they have a concomitant heart problem," said study author Dr. Sittinun Thangjui of Bassett Healthcare Network, Cooperstown, US. Marijuana or cannabis is the most commonly used psychoactive substance worldwide.2 However, there is limited knowledge about safety of the drug in people with cardiac arrhythmias. This study examined the burden ...

Osaka, Japan - Scientists at Osaka University, in cooperation with JOANNEUM RESEARCH (Weiz, Austria), introduced wireless health monitoring patches that use embedded piezoelectric nanogenerators to power themselves with harvested biomechanical energy. This work may lead to new autonomous health sensors as well as battery-less wearable electronic devices. As wearable technology and smart sensors become increasingly popular, the problem of providing power to all of these devices become more relevant. While the energy requirements of each component may be modest, the need for wires or even batteries become burdensome and inconvenient. That is why new energy harvesting methods are needed. Also, the ability ...

Among the first lessons any grade school science student learns is that white light is not white at all, but rather a composite of many photons, those little droplets of energy that make up light, from every color of the rainbow - red, orange, yellow, green, blue, indigo, violet. Now, researchers at Stanford University have developed an optical device that allows engineers to change and fine-tune the frequencies of each individual photon in a stream of light to virtually any mixture of colors they want. The result, published April 23 in Nature Communication, is a new photonic architecture that could transform fields ranging from digital communications and artificial intelligence to cutting-edge quantum computing. "This powerful new tool puts a degree of control in the engineer's ...

Quantum systems consisting of several particles can be used to measure magnetic or electric fields more precisely. A young physicist at the University of Basel has now proposed a new scheme for such measurements that uses a particular kind of correlation between quantum particles. In quantum information, the fictitious agents Alice and Bob are often used to illustrate complex communication tasks. In one such process, Alice can use entangled quantum particles such as photons to transmit or "teleport" a quantum state - unknown even to herself - to Bob, something that is not feasible using traditional communications. However, it has been unclear whether the team Alice-Bob can use similar quantum states for other things besides communication. A young physicist at the University ...

Images A new real-time, 3D motion tracking system developed at the University of Michigan combines transparent light detectors with advanced neural network methods to create a system that could one day replace LiDAR and cameras in autonomous technologies. While the technology is still in its infancy, future applications include automated manufacturing, biomedical imaging and autonomous driving. A paper on the system is published in Nature Communications. 50928751578_a3702cc26c_q.jpgThe imaging system exploits the advantages of transparent, nanoscale, highly sensitive graphene photodetectors developed by Zhaohui Zhong, U-M associate professor of electrical and computer engineering, and his group. They're believed to be the first of their kind. "The ...

The tree of life just got a little bigger: A team of scientists from the U.S. and China has identified an entirely new group of microbes quietly living in hot springs, geothermal systems and hydrothermal sediments around the world. The microbes appear to be playing an important role in the global carbon cycle by helping break down decaying plants without producing the greenhouse gas methane. "Climate scientists should take these new microbes into account in their models to more accurately understand how they will impact climate change," said END ...

A patient arrives at hospital with chest pain. Doctors suspect heart attack and rapid diagnosis is important, but the tests to confirm it can be invasive and it could easily be something else. Could a simple blood test help to non-invasively rule heart attack in or out? A new study in open access journal Frontiers in Cardiovascular Medicine certainly suggests so. The study identified telltale markers in the blood of heart attack patients that distinguished them from patients suffering chest pain with other causes. The researchers hope that the results will lead to new diagnostic tests for heart attacks. If you have ever suffered chest pain, the possibility of a heart attack may have popped into your head. While chest pain is ...

New research provides evidence that people have transmitted SARS-CoV-2, the virus that causes COVID-19, to cats during the pandemic in the UK. The study, which is published in Veterinary Record, detected the virus last year in cats that developed mild or severe respiratory disease. Investigators used a range of laboratory techniques to show that two domestic cats from households with suspected cases of COVID-19 were infected with SARS-CoV-2. "These findings indicate that human-to-cat transmission of SARS-CoV-2 occurred during the COVID-19 pandemic in ...

Researchers from the University of Oxford and their partners have today reported findings from a Phase IIb trial of a candidate malaria vaccine, R21/Matrix-M, which demonstrated high-level efficacy of 77% over 12-months of follow-up. In their findings (posted on SSRN/Preprints with The Lancet) they note that they are the first to meet the World Health Organization's Malaria Vaccine Technology Roadmap goal of a vaccine with at least 75% efficacy. The authors report (in findings in press with The Lancet) from a Phase IIb randomised, controlled, double-blind trial conducted at the Clinical Research Unit of Nanoro (CRUN) / Institut de Recherche en Sciences de la Santé (IRSS), Burkina Faso. 450 participants, aged 5-17 months, were recruited from the catchment area of Nanoro, covering ...

New research led by Curtin University has revealed how radar satellites can improve the ability to detect, monitor, prepare for and withstand natural disasters in Australia including bushfires, floods and earthquakes. The research used Synthetic Aperture Radar data obtained by the European Space Agency Sentinel-1 satellite, amongst others, to evaluate Australia-specific case studies. Lead researcher Dr Amy Parker, an ARC Research Fellow from Curtin's School of Earth and Planetary Sciences, said the Sentinel-1 satellite mission provided the first complete global Synthetic Aperture Radar (SAR) dataset and the first opportunity to use this type of data to assess hazards in new locations, including Australia. "What makes SAR so valuable is that it provides all-weather and night-and-day ...

Researchers from Nanjing University, National Sun Yat-sen University, and Northwestern University published a new paper in the Journal of Marketing that shows that the spatial distance between products and consumers can affect perceived value and willingness to pay. The study, forthcoming in the Journal of Marketing, is titled "Values Created from Far and Near: Influence of Spatial Distance on Brand Evaluation" and is authored by Xing-Yu (Marcos) Chu, Chun-Tuan Chang, and Angela Y. Lee. No one ever questions why some retail products are on display in cabinets behind the sales counter, ...

A new species of deep-sea dwelling dumbo octopus called Grimpoteuthis imperator sp. nov. has been described using a combination of MRI, micro-CT and minimally invasive gene analysis rather than traditional dissection methods. The findings are presented in the open access journal BMC Biology. The single specimen, which was identified as a mature male, was named G. imperator because it was discovered in the northern part of the Emperor Seamounts, an undersea mountain ridge in the Northwest Pacific Ocean. In addition to the scientific name in Latin, the authors suggest possible common names for this new species such as Emperor dumbo, Dumbo impérial (French), and Kaiserdumbo (German). Finned or dumbo octopods, although considered rare organisms, form ...

Grass crops are able to bend the rules of evolution by borrowing genes from their neighbours, giving them a competitive advantage, a new study has revealed. Research, led by the University of Sheffield, is the first to show that grasses can incorporate DNA from other species into their genomes through a process known as lateral gene transfer. The stolen genetic secrets give them an evolutionary advantage by allowing them to grow faster, bigger or stronger and adapt to new environments quicker. These findings could inform future work to create crops that are more resistant to the effects of climate change and help to tackle food security problems. The Sheffield team studied grasses, which include some of the most economically and ecologically important plants, such as the most ...

A radically reformed approach to education, in which different subjects teach connected themes, like climate change or food security, is being proposed by researchers, who argue that it would better prepare children for future crises. In a newly-published study, education researchers from the Universities of Cambridge and Edinburgh argue that there is a compelling case for a drastic shake-up of the school curriculum, so that subjects are no longer taught independently of one another. Instead, they argue that the arts and sciences should 'teach together' around real-world problems, and in a manner ...

California produces nearly 4 million tons of world-class wine each year, but with that comes thousands of tons of residue like grape skins, seeds, stems and pulp. What if scientists could harness that viticultural waste to help promote human health? Maybe they can, according to new research from food scientists at the University of California, Davis. In a study published in the journal LWT - Food Science and Technology, the team discovered a wealth of potentially health-enhancing compounds and sugar molecules called oligosaccharides within chardonnay wine-grape pomace. Oligosaccharides are found in many plant and animal tissues, including human breast milk. Recent advances have revealed oligosaccharides' vast potential ...

HOUSTON - (April 22, 2021) - There's gold in them thar nanoparticles, and there used to be a lot of silver, too. But much of the silver has leached away, and researchers want to know how. Gold-silver alloys are useful catalysts that degrade environmental pollutants, facilitate the production of plastics and chemicals and kill bacteria on surfaces, among other applications. In nanoparticle form, these alloys could be useful as optical sensors or to catalyze hydrogen evolution reactions. But there's an issue: Silver doesn't always stay put. A new study by scientists at Rice University and the University ...

RESEARCH TRIANGLE PARK, N.C. -- New photonics research paves the way for improved lasers, high-speed computing and optical communications for the Army. Photonics has the potential to transform all manners of electronic devices by storing and transmitting information in the form of light, rather than electricity. Using light's speed and the way information can be layered in its various physical properties can increase the speed of communication while reducing wasted energy; however, light sources such as lasers need to be smaller, stronger and more stable to achieve that, researchers ...

PHILADELPHIA-- Art appreciation is considered essential to human experience. While taste in art varies depending on the individual, cognitive neuroscience can provide clues about how viewing art affects our neural systems, and evaluate how these systems inform our valuation of art. For instance, one study shows that viewing art activates motor areas, both in clear representations of movement, like Adam and Eve in Michelangelo's Expulsion from Paradise, and in implied movement through brush strokes, like in Franz Kline's gestural paintings. Altered neural functioning, like that experienced in patients with Parkinson's disease, changes the way ...