Tech
Changes in the water cycle have important impacts on ecosystems and human activities. In the context of the current and expected temperature rise due to global warming, it is extremely important to understand the origin and extent of these changes.
The valleys of two-dimensional transition metal dichalcogenides (TMDCs) offer a new degree of freedom for information processing and have attracted tremendous interest for their possible applications in valleytronics. To develop valleytronics devices based on TMDCs, effective approaches to separate valleys in the near or far field are indispensable. In recent researches, kinds of nanostructures are proposed to separate valleys and much progress has been made.
Light-field imaging can detect both spatial and angular information of light rays. The angular information offers peculiar capabilities over conventional imaging, such as viewpoint shifting, post-capture refocusing, depth sensing, depth-of-field extension, etc. The concept of plenoptic cameras by adding a pinhole array or microlens array was proposed more than a century ago. Nowadays, microlens array based plenoptic cameras are commonly used for light-field imaging, such as the commercially available products, Lytro and Raytrix.
Non-orthogonal multiple access (NOMA) and millimeter-wave (mmWave) are two crucial techniques of 5G to meet the explosive capacity demands. On the other hand, UAVs deployed as aerial base stations are potential to provide ubiquitous coverage and satisfy users' multifarious requirements due to their flexibility and mobility. Nevertheless, the finite onboard energy is a fundamental limit of UAVs, which can deter the performance of UAV communication networks.
CHAMPAIGN, Ill. -- In the nanoworld, tiny particles such as proteins appear to dance as they transform and assemble to perform various tasks while suspended in a liquid. Recently developed methods have made it possible to watch and record these otherwise-elusive tiny motions, and researchers now take a step forward by developing a machine learning workflow to streamline the process.
According to the scientists, this plant is a source of valuable biologically active substances with cardioprotective, neuroprotective, anti-inflammatory, antitumor, and antiviral effects.
Researchers from the Universities of Turku and Helsinki in Finland have been looking into literature about wind farm impacts on bats in several countries around the Baltic Sea (Estonia, Finland, Latvia, Lithuania, Russia and Sweden) and in the rest of Europe. They published a review on the topic.
The results are quite straightforward: impacts of wind farms on bats in the Baltic Sea region have barely been investigated.
Big mammals such as elephants, rhinos and primates are at highest risk of extinction in the national parks and nature reserves of the world's poorest countries, a new global review has found.
The review, which looked at 81 studies carried out between 1980 and 2020, found that illegal hunting was causing worrying declines in the big mammal populations of protected areas across the globe, and particularly in poorer countries.
A new study has revealed how remora suckerfish detach themselves from the surfaces they've clung to - and how the mechanism could provide inspiration for future reversible underwater adhesion devices.
The research, by an international, multidisciplinary team working across robotics, comparative biology, and electrical engineering, investigated the detachment mechanism of the remora's suction disc, and experimented with how it could be applied in underwater robots.
FRANKFURT/AACHEN. Since the beginning of the pandemic, research groups have been working on methods to detect SARS-CoV-2 viruses in wastewater to be used to monitor the degree of COVID-19 transmission among the population. The idea is simple: since infected people shed SARS-CoV-2 viruses in their faeces, wastewater samples could give an indication of the infection numbers among all the residents connected to a wastewater treatment plant.
As the first peak of the COVID-19 pandemic approached, governments feared there would not be enough ventilators - machines that 'breathe' for patients when they cannot do so themselves - to help all those who needed one.
Now, researchers from King's College London and Imperial College London have developed a theoretical model for how one ventilator could be used to treat two patients. They say that, although splitting ventilators can be inherently dangerous, their model shows how some of the issues can be mitigated by using variable resistances and one-way valves.
The timeliness of mail delivery may affect access to medication for many middle-aged and older adults, according to a new analysis of data from a national poll of people aged 50 to 80.
Nearly one in four people in this age group said they receive at least one medication by mail, but that percentage rises to 29% when the poll results are limited to people who take at least one prescription medication. Nearly 17% of people in this group say they receive all their medications via mail.
The COVID-19 pandemic is having a profound, negative impact on nine out of ten people with experience of eating disorders, a new study from Northumbria University, Newcastle, reveals.
According to Beat, the UK's eating disorder charity, approximately 1.25 million people in the UK have an eating disorder. Until now, little was known about the impact of the pandemic on this population.
An automatic, electronic alert on general practitioners' (GPs) computer screens can help to prevent excessive prescribing of short-acting asthma reliever medication, according to research presented at the 'virtual' European Respiratory Society International Congress. [1]
A new study examines the effects of cancer and its treatment on the aging process. Investigators found that expression of a gene associated with aging is higher in young patients with cancer after treatment with chemotherapy and in young cancer survivors who are frail. The findings are published early online in CANCER, a peer-reviewed journal of the American Cancer Society (ACS).