Circularly polarized light exhibits promising applications in future displays and photonic technologies. Traditionally, circularly polarized light is converted from unpolarized light by the linear polarizer and the quarter-wave plate. During this indirectly physical process, at least 50% of energy will be lost. Circularly polarized luminescence (CPL) from chiral luminophores provides an ideal approach to directly generate circularly polarized light, in which the energy loss induced by polarized filter can be reduced. Among various chiral luminophores, organic micro-/nano-structures have attracted increasing attention owing to the high quantum efficiency ...

Tsukuba, Japan - Tropical cyclones like typhoons may invoke imagery of violent winds and storm surges flooding coastal areas, but with the heavy rainfall these storms may bring, another major hazard they can cause is landslides--sometimes a whole series of landslides across an affected area over a short time. Detecting these landslides is often difficult during the hazardous weather conditions that trigger them. New methods to rapidly detect and respond to these events can help mitigate their harm, as well as better understand the physical processes themselves. In a new study published in Geophysical Journal International, a research team led ...

Hokkaido University researchers have clarified different causes of past glacial river floods in the far north of Greenland, and what it means for the region's residents as the climate changes. The river flowing from the Qaanaaq Glacier in northwest Greenland flooded in 2015 and 2016, washing out the only road connecting the small village of Qaanaaq and its 600 residents to the local airport. What caused the floods was unclear at the time. Now, by combining physical field measurements and meteorological data into a numerical model, researchers at Japan's Hokkaido ...

The semiconductor industry and pretty much all of electronics today are dominated by silicon. In transistors, computer chips, and solar cells, silicon has been a standard component for decades. But all this may change soon, with gallium nitride (GaN) emerging as a powerful, even superior, alternative. While not very heard of, GaN semiconductors have been in the electronics market since 1990s and are often employed in power electronic devices due to their relatively larger bandgap than silicon--an aspect that makes it a better candidate for high-voltage and high-temperature applications. Moreover, current travels quicker through GaN, which ensures fewer switching losses during switching applications. Not everything about GaN is perfect, however. While impurities are usually desirable ...

People who have recovered from COVID-19, especially those with pre-existing cardiovascular conditions, may be at risk of developing blood clots due to a lingering and overactive immune response, according to a study led by Nanyang Technological University, Singapore (NTU) scientists. The team of researchers, led by NTU Assistant Professor Christine Cheung, investigated the possible link between COVID-19 and an increased risk of blood clot formation, shedding new light on "long-haul COVID" - the name given to the medium- and long-term health consequences of COVID-19. The findings may help to explain why some people who have recovered from COVID-19 exhibit symptoms of blood clotting complications after their initial recovery. In some cases, they are at increased risk of heart attack, ...

Evolutionary anthropologists from the University of Vienna and colleagues now present evidence for a different explanation, published in PNAS. A larger bony pelvic canal is disadvantageous for the pelvic floor's ability to support the fetus and the inner organs and predisposes to incontinence. The human pelvis is simultaneously subject to obstetric selection, favoring a more spacious birth canal, and an opposing selective force that favors a smaller pelvic canal. Previous work of scientists from the University of Vienna has already led to a relatively good understanding of this evolutionary "trade-off" and how it results in the high rates of obstructed labor in modern humans. ...

They are diligently stoking thousands of bonfires on the ground close to their crops, but the French winemakers are fighting a losing battle. An above-average warm spell at the end of March has been followed by days of extreme frost, destroying the vines with losses amounting to 90 percent above average. The image of the struggle may well be the most depressingly beautiful illustration of the complexities and unpredictability of global climate warming. It is also an agricultural disaster from Bordeaux to Champagne. It is the loss of the Arctic sea-ice due to climate warming that has, somewhat paradoxically, been implicated with severe cold and snowy mid-latitude winters. "Climate change doesn't always manifest in the most ...

Altering a mosquito's gut genes to make them spread antimalarial genes to the next generation of their species shows promise as an approach to curb malaria, suggests a preliminary study published today in eLife. The study is the latest in a series of steps toward using CRISPR-Cas9 gene-editing technology to make changes in mosquito genes that could reduce their ability to spread malaria. If further studies support this approach, it could provide a new way to reduce illnesses and deaths caused by malaria. Growing mosquito resistance to pesticides, as well as malaria parasite resistance ...

Many consumers are willing to pay for improved environmental quality and thus non-market values of impacts of food production on e.g. water quality, C sequestration, biodiversity, pollution, erosion or GHG emissions may even be comparable to the market value of agricultural production. Diverfarming project elucidated how consumers value agroecosystem services enabled by diversification and provided consumer perspectives for developing future agricultural and food policies to better support cropping diversification. The researchers quantified consumers' willingness to pay for the benefits of increased farm and regional scale diversity of cultivation practices and crop rotations. Three valuation scenarios were presented to a ...

Spain boasts the largest cultivated area of almond trees in the world, with more than 700,000 ha (MAPA, 2018), but ranks third in terms of production. How can this be? Actually it's easy to explain: most of the country's cultivated area of almond trees is comprised of traditional rainfed orchards and located in marginal areas featuring a low density of trees per hectare. Over the last decade, however, the nut's surging prices havegiven rise to intensive almond tree plantations characterised bya high density of trees per hectare and the employment offertilisation and irrigation, yielding endless rows of white when the trees are in bloom. Knowing what the future of these plantations will be like in a ...

With summer around the corner, a project shows how implementing an evidence-based mindfulness program in a summer camp setting decreases emotional distress in school age children and empowers campers and counselors alike - enhancing camper-counselor relationships. Mindfulness - a state of consciousness that fosters awareness - has the potential to help regulate emotions and behaviors. Researchers from Florida Atlantic University's Christine E. Lynn College of Nursing implemented an eight-week program guided by the Mindful Schools© curricula in a large urban summer day camp program (ages 3 to seventh grade). Mindfulness-based practices are intentional exercises ...

Light can be used to operate quantum information processing systems, e.g. quantum computers, quickly and efficiently. Researchers at Karlsruhe Institute of Technology (KIT) and Chimie ParisTech/CNRS have now significantly advanced the development of molecule-based materials suitable for use as light-addressable fundamental quantum units. As they report in the journal Nature Communications, they have demonstrated for the first time the possibility of addressing nuclear spin levels of a molecular complex of europium(III) rare-earth ions with light. (DOI: 10.1038/s41467-021-22383-x) Whether in drug development, communication, or for climate forecasts: Processing information quickly and efficiently is crucial in many areas. It is currently done using digital computers, ...

Imprinting is a popularly known phenomenon, wherein certain animals and birds become fixated on sights and smells they see immediately after being born. In ducklings, this can be the first moving object, usually the mother duck. In migrating fish like salmon and trout, it is the smells they knew as neonates that guides them back to their home river as adults. How does this happen? Exposure to environmental input during a critical period early in life is important for forming sensory maps and neural circuits in the brain. In mammals, early exposure to environmental inputs, as in the case of imprinting, is known to affect perception and social behavior later in life. Visual imprinting has ...

New research led by a professor at NUI Galway is set to change how doctors treat some patients with high blood pressure - a condition that affects more than one in four men and one in five women. The study by researchers at NUI Galway, Johns Hopkins University and Harvard Medical School found no evidence that diastolic blood pressure - the bottom reading on a blood pressure test - can be harmful to patients when reduced to levels that were previously considered to be too low. Lead researcher Bill McEvoy, Professor of Preventive Cardiology at NUI Galway and a Consultant Cardiologist at University Hospital Galway, said the findings have the potential to immediately influence ...

New research by the University of Kent and the SWPS University has discovered that national narcissists are more likely to support greenwashing (misleading information about the environmental benefits of a product, a company or a policy) in order to improve their nation's public image. Findings show that while national narcissists are not likely to support genuine pro-environmental campaigns, they are ready to support political greenwashing campaigns. In business greenwashing decreases consumers' trust and undermines both the image and the profits of the companies that use this strategy. In the realms of politics, it may garner ...

Is it possible to simultaneously address the increase of the concentration of carbon dioxide (CO2) in the atmosphere and the resulting acidification of the oceans? The research of the project DESARC-MARESANUS, a collaboration between the Politecnico di Milano and the CMCC Euro-Mediterranean Center on Climate Change Foundation, explores the feasibility of this process, its chemical and environmental balance, and the benefits for the marine sector, focusing on the Mediterranean basin. It is now widely recognized that in order to reach the target of limiting global warming ...

A five-year study of mule deer does and newborn fawns in western Wyoming shows that migrating deer have a lot to balance when it comes to birth timing. The study led by University of Wyoming scientists challenges the long-held assumption that animals match offspring birth with the peak green-up of forage at the birth site. Instead, only deer that migrated long distances and followed the flush of spring green-up from low elevation winter ranges to higher-elevation summer ranges were able to match birth with peak green-up. Other deer migrated shorter distances and gave birth earlier, but birth was out of sync with green-up. The researchers' work appears in the journal Ecology. To ...

Light beams are widely used in photonics applications and attracted immense research interests. Compared to homogeneously polarized light beams, vectorial optical fields (VOFs) with tailored wave-fronts and inhomogeneous polarization distributions exhibits more advantages in applications comparing to their scalar-wave counterparts, thanks to the added degree of freedom (DOF) of polarization. By tailoring the polarization distributions, special VOFs such as flap-top beams and radially polarized beams can be generated, being highly favored in super-resolution microscopy, optical manipulations, etc. Despite of great advances in applications, generation of such complex VOFs are far from satisfactory. Available methods ...

In a study published in Applied Materials Today, researchers from Singapore have developed the largest range of silicone and epoxy hybrid resins for the 3D printing of wearable devices, biomedical equipment, and soft robotics. The range of tunable functionally graded materials, which displayed over five orders of magnitude of elastic modulus, demonstrated excellent interfacial toughness, higher precision in complex structures and better fabrication control for the integration of mechatronic components. The multi-disciplinary team from the Singapore University of Technology and Design (SUTD) highlighted the issue on the potential of soft robotics being limited in its robustness and ...

Osaka, Japan - SARS-CoV-2 is the virus responsible for the COVID-19 pandemic. We know that mutations in the genome of SARS-CoV-2 have occurred and spread, but what effect do those mutations have? Current methods for studying mutations in the SARS-CoV-2 genome are very complicated and time-consuming because coronaviruses have large genomes, but now a team from Osaka University and Hokkaido University have developed a quick, PCR-based reverse genetics system for analyzing SARS-CoV-2 mutations. This system uses the polymerase chain reaction (PCR) and a circular polymerase extension reaction (CPER) to reconstruct the full-length cDNA of viral genome. This process does not involve the use of bacteria, which can introduce further ...

In the 1930s, English climatologist, Sir Gilbert Walker, successfully predicted Indian summer monsoon rainfall (ISMR) based on the relationship between Southern Oscillation and ISMR connected by what is later-called Walker circulation, which is regarded as the first achievement of modern climate prediction with a clear physical mechanism. The Southern Oscillation was also recognized as the atmospheric component of El Nino-Southern Oscillation (ENSO). However, at the end of the 20th century, a research in Science led by Indian climatologist Krishna Kumar found the significant reverse relationship between ENSO and Indian rainfall has been ...

Ammonia (NH3) is among the most important chemicals produced by humans and has a promising future in sustainable energy applications besides being used in fertilizer production. Unfortunately, so far, the only realistic way that exists to produce ammonia at an industrial scale is through the Haber-Bosch process. This technique, discovered in the 19th century, is very energy-intensive and environmentally unfriendly; about 2% of the yearly global CO2 emissions come from Haber-Bosch processes. "Considering the threats posed by global warming, it is high time we swap to an ammonia synthesis route with zero CO2 emissions," says Professor Sangaraju Shanmugam from Daegu Gyeongbuk Institute of Science and Technology (DGIST), Korea. ...

What started out as a second-year physics project is making its way into Amazon Web Service's (AWS) quantum computing program. University of Sydney science undergraduate Pablo Bonilla Ataides has tweaked some computing code to effectively double its capacity to correct errors in the quantum machines being designed in the emerging technology sector. The simple but ingenious change to quantum error correcting code has grabbed the attention of quantum researchers at the AWS Center for Quantum Computing in Pasadena, California, and the quantum technology programs at Yale University and Duke University in the United States. "Quantum technology is in its infancy, partly because we haven't ...

CORVALLIS, Ore. - A new study by Oregon State University researchers found that shade provided by solar panels increased the abundance of flowers under the panels and delayed the timing of their bloom, both findings that could aid the agricultural community. The study, believed to be the first that looked at the impact of solar panels on flowering plants and insects, has important implications for solar developers who manage the land under solar panels, as well as agriculture and pollinator health advocates who are seeking land for pollinator habitat restoration. The findings, ...

Durham, NC - When leukemia strikes an older person, it is in part due to the aging of his or her hematopoietic stem cells (HSCs). These immature cells can develop into all types of blood cells, including white blood cells, red blood cells and platelets. As such, researchers have focused on rejuvenating HSCs as a way to treat leukemia. A new study released today in STEM CELLS adds much to that level of knowledge by showing that the youthful function of rejuvenated HSCs upon transplantation depends in part on a young bone marrow "niche," which is the microenvironment surrounding stem cells that interacts with them to regulate their fate. "The information revealed by our study tells us that the influence of this niche ...