feed info

52 articles from PhysOrg

TACC COVID-19 twitter dataset enables social science research about pandemic

Of the myriad ways researchers are fighting the spread of the coronavirus, studying Tweets may not be the first that come to mind. But now, as in past crises, tapping into one of the world's leading real-time messaging service can help identify new pandemic hotspots, highlight new symptoms, or interpret how people and communities are responding to orders to practice social distancing.

Study reveals single-step strategy for recycling used nuclear fuel

A typical nuclear reactor uses only a small fraction of its fuel rod to produce power before the energy-generating reaction naturally terminates. What is left behind is an assortment of radioactive elements, including unused fuel, that are disposed of as nuclear waste in the United States. Although certain elements recycled from waste can be used for powering newer generations of nuclear reactors,...

Blood flows could be more turbulent than previously expected

Blood flow in the human body is generally assumed to be smooth due to its low speed and high viscosity. Unsteadiness in blood flow is linked to various cardiovascular diseases and has been shown to promote dysfunction and inflammation in the inner layer of blood vessels, the endothelium. In turn, this can lead to the development of arteriosclerosis—a leading cause of death worldwide—where...

Scholes finds novel magnetic field effect in diamagnetic molecules

The Princeton University Department of Chemistry publishes research this week proving that an applied magnetic field will interact with the electronic structure of weakly-magnetic, or diamagnetic, molecules to induce a magnetic-field effect that, to their knowledge, has never before been documented.

To make an atom-sized machine, you need a quantum mechanic

Here's a new chapter in the story of the miniaturisation of machines: researchers in a laboratory in Singapore have shown that a single atom can function as either an engine or a fridge. Such a device could be engineered into future computers and fuel cells to control energy flows.

How gene flow between species influences the evolution of Darwin's finches

Despite the traditional view that species do not exchange genes by hybridisation, recent studies show that gene flow between closely related species is more common than previously thought. A team of scientists from Uppsala University and Princeton University now reports how gene flow between two species of Darwin's finches has affected their beak morphology. The study is published today in Nature...

2016 presidential campaign emails reveal strategy, surprises

While public discussion during and after the 2016 presidential campaign between Donald Trump and Hillary Clinton largely focused on emails and email servers, a team of political science scholars zeroed in on email communications distributed by the campaigns and found that email is still an important campaign tool despite its mundane nature.

How new materials increase the efficiency of direct ethanol fuel cells

Ethanol has five times higher volumetric energy density (6.7 kWh/L) than hydrogen (1.3 kWh/L) and can be used safely in fuel cells for power generation. In Brazil in particular there is great interest in better fuel cells for ethanol as that country distributes low-cost ethanol produced in a renewable way from sugar cane. Theoretically, the efficiency of an ethanol fuel cell should be 96 percent,...

Climate change increases risk of fisheries conflict

A team of fisheries scientists and marine policy experts, led by a University of Rhode Island researcher, examined how climate change is affecting the ocean environment and found that the changing conditions will likely result in increased fisheries-related conflicts and create new challenges in the management of global fisheries.

Research examines the impact of new technology used in video court hearings

The Video Enabled Justice (VEJ) Independent Evaluation was led by academics from the University of Surrey's Department of Sociology and the Centre for Translation Studies in the School of Literature and Languages. Sponsored by the Sussex Police and Crime Commissioner Katy Bourne, the report investigated the impact of a new booking tool used in the organisation of first appearance remand hearings...

Foraging Drosophila flies are open for new microbial partners

In a comprehensive ecological study, a team of scientists at the Max Planck Institute for Chemical Ecology in Jena examined three different species of the genus Drosophila and their interactions with their natural food resources, in particular the yeasts associated with these substrates. They found that vinegar flies do not necessarily prefer yeasts they know from their natural environments, but...