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United States Officially Rejoins Paris Agreement

On January 20, on his first day in office, President Biden signed the instrument to bring the United States back into the Paris Agreement. Per the terms. ....

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Starry night or black holes?

Our astronomers have helped make a huge map of the night sky showing more than 25,000 active supermassive black holes in distant galaxies. The map is the. ....

Durham University Public , Durham University , Black Hole , டர்ஹாம் பல்கலைக்கழகம் பொது , டர்ஹாம் பல்கலைக்கழகம் , கருப்பு துளை ,

Heat loss control method in fusion reactors

The TCV Tokamak at EPFL’s Swiss Plasma Center © A. Herzog / EPFL
The core of a fusion reactor is incredibly hot. Hydrogen that inevitably escapes from it must be cooled on its way to the wall, as otherwise, the reactor wall would be damaged. Researchers from the Dutch institute DIFFER and EPFL’s Swiss Plasma Center have developed a strict measurement and control method for the cooling of very hot particles escaping from fusion plasmas. This milestone for fusion research is published in Nature Communications.
“We are going from studying to controlling. This is vital for the future of fusion reactors,” says first author Timo Ravensbergen (DIFFER). “We measure, calculate, and control with incredible speed.” Fusion energy is a promising sustainable energy source. In a fusion reactor, extremely hot hydrogen plasma is kept suspended by magnetic fields. However, there is always a fraction that escapes. To prevent it from damaging the reactor vessel, the escaped hydro ....

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Conservation paradox - pros and cons of recreational hunting

Date Time
Conservation paradox – pros and cons of recreational hunting
Recreational hunting is frequently suggested as a way to conserve nature and support local people’s livelihoods. However, recreational hunting, especially hunting of charismatic species for their trophies, raises ethical and moral concerns.
In a new article published in the journal One Earth, scientists from the University of Helsinki in Finland and Flinders University in Australia have reviewed more than 1,000 studies on recreational hunting. This is the first attempt to summarize the scientific literature examining the biodiversity and social effects of recreational hunting globally.
“We used automated approaches to investigate and summarize the main topics surrounding recreational hunting. This also allowed us to determine the geographic spread and diversity of species hunted around the globe”, says Professor Corey Bradshaw from Flinders University. ....

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Engineers Place Molecule-Scale Devices in Precise Orientation

Proof-of-concept project paves the way for the integration of molecules with computer chips
Engineers have developed a technique that allows them to precisely place microscopic devices formed from folded DNA molecules in not only a specific location but also in a specific orientation.
As a proof-of-concept, they arranged more than 3,000 glowing moon-shaped nanoscale molecular devices into a flower-shaped instrument for indicating the polarization of light. Each of 12 petals pointed in a different direction around the center of the flower, and within in each petal about 250 moons were aligned to the direction of the petal. Because each moon only glows when struck by polarized light matching its orientation, the end result is a flower whose petals light up in sequence as the polarization of light shined upon it is rotated. The flower, which spans a distance smaller than the width of a human hair, demonstrates that thousands of molecules can be reliably oriented on the surfac ....

United Kingdom , David Kirkpatrick , Ashwin Gopinath , Chris Thachuk , Vincent Van Gogh , Caltech Paul Rothemund , Harry Atwater , Orr Family Foundation , Abedin Institute , Office Of Naval Research , National Science Foundation , Research Almaden , University Of Washington , University Of British Columbia , Office Of Scientific Research , Paul Rothemund , British Columbia , Howard Hughes Professor , Applied Physics , Materials Science , Anna Mitskovets , Naval Research , Air Force Office , Scientific Research , Banting Postdoctoral , California Institute Of Technology ,