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62 articles from PhysOrg

Do campaign finance reforms truly help make elections more competitive?

Proponents of campaign finance reform claim that putting limits on how much money can be raised and spent to support a political candidate leads to more competitive elections by helping level the political playing field between incumbents—the people holding the political office—and challengers. However, a new study by two social scientists at the University of Missouri finds state campaign...

Scientists constructed 'DNA droplets' comprising designed DNA nanostructures

In living organisms, DNA is the storage unit of all genetic information. It is with this information that proteins are encoded, which then enable biological systems to function as needed for the organism to survive. DNA's functioning is enabled by its structure: a double-stranded helix formed via the joining of specific pairs of molecules called 'nucleotides' in specific orders, called...

New nuclear magnetic resonance method enables monitoring of chemical reactions in metal containers

Nuclear magnetic resonance (NMR) is employed in a wide range of applications. In chemistry, nuclear magnetic resonance spectroscopy is in standard use for the purposes of analysis, while in the medical field, magnetic resonance imaging (MRI) is used to see structures and metabolism in the body. Scientists at Johannes Gutenberg University Mainz (JGU) and the Helmholtz Institute Mainz (HIM), working...

Cases of black hole mistaken identity

Astronomers have discovered one type of growing supermassive black hole masquerading as another, thanks to a suite of telescopes including NASA's Chandra X-ray Observatory. The true identity of these black holes helps solve a long-running mystery in astrophysics.

What COVID-19 can teach tourism about the climate crisis

The global coronavirus pandemic has hit the tourism industry hard worldwide. Not only that, but it has exposed a lack of resilience to any type of downturn, according to new research from Lund University in Sweden. While the virus may or may not be temporary, the climate crisis is here to stay—and tourism will have to adapt, says Stefan Gössling, professor of sustainable tourism.

New Mygatt-Moore quarry research leads to prehistoric climate finds

Top predator dinosaurs like the Allosaurus and Ceratosaurus devouring dinosaur remains isn't all that surprising, but the smaller creatures feasting on dinosaur remains may just give us a more complete picture of what life was like at Mygatt-Moore Quarry outside Fruita, Colorado 152 million years ago. A new study out in PeerJ on Wednesday, July 15th, 2020 authored by Museums of Western Colorado's...

Transparent inorganic multicolour displays enabled by zinc-based electrochromic devices

Multicolour electrochromic displays are one of the most versatile applications because they can retain their colored states without the need to supply electrical power. However, the simultaneous colouration of the counter layer when operating a conventional electrochromic display restricts the color overlay effects. Additionally, the operation of conventional electrochromic displays requires...

The smallest micro-gripper, grown on optical fibers, is operated remotely with light

Researchers at the Faculty of Physics, University of Warsaw, used the liquid crystal elastomer technology to demonstrate a series of micro-tools grown on optical fibers. The 200-micrometer gripers are controlled remotely, without electric wiring or pneumatic tubing, with green light delivered through the fibers—absorbed light energy is directly converted into the gripper jaws' action.

Monitoring groundwater changes more precisely

A new method could help to track groundwater changes better than before. To this end, researchers from Potsdam and Oberlin, Ohio (USA), have compared gravity field data from the GRACE and GRACE-Follow On satellite missions with other measuring methods. They investigated the seasonal water storage in almost 250 river basins in Asia, whose water regime is dominated by monsoon. The results allow the...