1,340 articles mezi dny 1.8.2020 a 31.8.2020

Algorithm predicts the compositions of new materials

A machine-learning algorithm that can predict the compositions of trend-defying new materials has been developed by RIKEN chemists1. It will be useful for finding materials for applications where there is a trade-off between two or more desirable properties.

Scientists discover curious clues in the war between cystic fibrosis bacteria

Several kinds of bacteria can cause lung infections in people with cystic fibrosis (CF). Pseudomonas aeruginosa, which can cause pneumonia, typically infects infants or young children and persists for life, while Burkholderia cepacia complex species only infect teenagers and adults. Although Burkholderia infections are rare, when they do take hold, they are deadly. Now, UNC School of Medicine...

Researchers warn of climate repercussions if Brazilian highway through the Amazon is paved

A pair of researchers with the National Institute for Research in Amazonia has posted an open letter in the journal Science warning of the negative repercussions of resuming paving of a road through a part of the Amazon. In their letter, Lucas Ferrante and Philip Martin Fearnside suggest that resumption of paving will lead to releasing large amounts of carbon dioxide into the atmosphere, further...

Building a prairie and watching for bees

It's early evening as I follow the researchers to their work site on the Phillips Tract, just east of Urbana. When we get there, I immediately notice two things: We are standing in a vast grid of prairie plots with neatly mowed paths between them, and there are tents—dozens of dollhouse-sized tents.

Q&A: What's math got to do with peace?

Larry Liebovitch is a professor in the Department of Physics and the Department of Psychology at Queens College, and at the Physics Program of the Graduate Center, City University of New York. He is also a core faculty member of the Sustaining Peace Project at the Earth Institute's Advanced Consortium on Cooperation, Conflict, and Complexity (AC4). He recently developed a mathematical model...

Pesticides and industrial pollutants found in snow atop Arctic glaciers

Researchers recently found pesticides and industrial compounds deposited in snow atop four high-elevation glacier sites on the Norwegian archipelago Svalbard, often considered a "pristine" environment. The long journey of these compounds—likely originating in the United States and Eurasia—shows the far-reaching impacts of industrial pollution.

Fine-tuning metabolic gene expression to identify variants in yeast genes

Scientists have developed a more nuanced library approach to tuning gene expression in metabolic pathways. Compared to the traditional way, which leverages an all-or-nothing approach to expression, scientists can now opt for various shades of gray. The ability to fine-tune the level of gene expression allowed researchers to identify variations of essential genes in metabolic networks that were...

'We're still so tired': Europe's doctors brace for second Covid-19 wave

When the Guardian spoke to staff in March they had no time for reflection. So what do they think of the new surge now? Coronavirus – latest updatesSee all our coronavirus coverageDuring the initial peak of Spain’s Covid-19 pandemic in the spring, the virus displayed an unexpected mercy. In its spread, ferocity and awful novelty, it left health workers too tired and overwhelmed to look beyond...

Hormones control paternal interest in offspring

Basing their research on an unexpected interspecies difference between rats and mice, researchers at Karolinska Institutet and Stockholm University have mapped a system in the brain that controls paternal behavior towards offspring. A key component in this behavior is the hormone prolactin, which prepares females for motherhood and has now been shown to control paternal behavior as well. The study...

Why are indoor settings higher risk for Covid – and are restaurants safe?

Experts say poor airflow, reduced distancing and prolonged exposure are key factors in the spread of coronavirusCoronavirus – latest updatesSee all our coronavirus coverageIn Aberdeen it was pubs, restaurants and golf courses. In Prague it was a nightclub. In California it was a church. Why does Covid-19 appear to spread more easily in some places than others?Prof Devi Sridhar, the chair of...

Software that monitors students during tests perpetuates inequality and violates their privacy

The coronavirus pandemic has been a boon for the test proctoring industry. About half a dozen companies in the US claim their software can accurately detect and prevent cheating in online tests. Examity, HonorLock, Proctorio, ProctorU, Respondus and others have rapidly grown since colleges and universities switched to remote classes. While there’s no official tally, it’s reasonable to say...

Six months into Covid pandemic, the UK's isolation programme is still a mess | Anthony Costello

The government is asking people who may have coronavirus to isolate - but it has no idea of whether they’re doing soCoronavirus – latest updatesSee all our coronavirus coverageOn 13 February, 83 British citizens left Arrowe Park hospital, Wirral, after 14 days of isolation, following their evacuation from Wuhan at the end of January. Two weeks was the appropriate quarantine response to...

Covid-19: lack of diversity threatens to undermine vaccine trials, experts warn

Oxford and Moderna trials draw from strikingly white cohort, for a virus that has disproportionately affected people of colourThe remarkably fast progress of two leading contenders for an effective coronavirus vaccine has raised hopes the pandemic may be speedily tamed. But some experts have warned the vaccine trials risk being undermined by a lack of diversity among their participants. Related:...

How falling solar costs have renewed clean hydrogen hopes

The world is increasingly banking on green hydrogen fuel to fill some of the critical missing pieces in the clean-energy puzzle. US presidential candidate Joe Biden’s climate plan calls for a research program to produce a clean form of the gas that’s cheap enough to fuel power plants within a decade. Likewise, Japan, South Korea, Australia, New Zealand, and the European Union have all...

SpaceX launches 57 stealth satellites for Starlink network, plus a pair for BlackSky

After weeks of delay, a SpaceX Falcon 9 rocket sent up 57 more satellites for its Starlink broadband internet constellation, with two BlackSky planet-watching satellites hitching a ride. The launch was originally scheduled for June, but had to be put off several times due to technical concerns, weather delays and range schedule conflicts. This time around, the countdown proceeded smoothly to...

The costs and benefits of addressing customer complaints

Researchers from Michigan State University, University of South Florida, St. John's University, and American Customer Satisfaction Index (ACSI) published a new paper that analyzes relationships between customer complaints, complaint handling by companies, and customer loyalty to understand how customer complaint management affects companies' performance and to inform companies how to manage...