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Новости за 03.05.2024

Hungry, hungry white dwarfs: Solving the puzzle of stellar metal pollution

Phys.org 

Dead stars known as white dwarfs, have a mass like the sun while being similar in size to Earth. They are common in our galaxy, as 97% of stars are white dwarfs. As stars reach the end of their lives, their cores collapse into the dense ball of a white dwarf, making our galaxy seem like an ethereal graveyard.

Ice shelves fracture under weight of meltwater lakes, study shows

Phys.org 

When air temperatures in Antarctica rise and glacier ice melts, water can pool on the surface of floating ice shelves, weighing them down and causing the ice to bend. Now, for the first time in the field, researchers have shown that ice shelves don't just buckle under the weight of meltwater lakes—they fracture.

Economies take off with new airports: Research shows positive impacts of airport investments

Phys.org 

Be it for work or vacation, chances are that many will have passed through an airport. In the largest cities, the airport presents to travelers the first glimpse of a new land and a reflection of the surrounding city. Beyond first impressions, airports stand as an important economic hub for local policymakers, with a continuous flow of goods and passengers fueling the urban economy.



New study is first to use statistical physics to corroborate 1940s social balance theory

Phys.org 

Most people have heard the famous phrase "the enemy of my enemy is my friend." Now, Northwestern University researchers have used statistical physics to confirm the theory that underlies this famous axiom. The study, "Proper network randomization is key to assessing social balance," is published in the journal Science Advances.

Functionalized chitosan as a biobased flocculant for the treatment of complex wastewater

Phys.org 

Researchers at the Fraunhofer Institute for Interfacial Engineering and Biotechnology IGB have developed a biobased and functionalized flocculant to efficiently treat complex wastewaters. Furthermore, toxic phenols are removed from the water by the enzyme laccase in a chitosan matrix. The functionalized and degradable flocculant LaChiPur will be presented for the first time at the IFAT in Munich held May 13–17, 2024.

Uncovering the reasons behind the rapid warming of the North Pole

Phys.org 

The North Pole region heats up faster than the rest of the world. Though this is a known fact, climate models underestimate the speed with which the region warms up. Sjoert Barten obtained his PhD on this subject at Wageningen University & Research on 26 April and shares his insights.

Solar orbiter takes a mind-boggling video of the sun

Phys.org 

You've seen the sun, but you've never seen the sun like this. This single frame from a video captured by ESA's Solar Orbiter mission shows the sun looking very fluffy! You can see feathery, hair-like structures made of plasma following magnetic field lines in the sun's lower atmosphere as it transitions into the much hotter outer corona. The video was taken from about a third of the distance between the Earth and the sun.

NASA is helping protect tigers, jaguars, and elephants—here's how

Phys.org 

As human populations grow, habitat loss threatens many creatures. Mapping wildlife habitat using satellites is a rapidly expanding area of ecology, and NASA satellites play a crucial role in these efforts. Tigers, jaguars, and elephants are a few of the vulnerable animals whose habitats NASA is helping track from space.

Climate change threatens mountain meadows by reducing humus content, finds study

Phys.org 

Mountain meadows are unique ecosystems. A research team led by the Technical University of Munich (TUM) has now discovered that climate change reduces the humus content as well as the nitrogen stores in the grassland soils of the Alps and disturbs the soil structure. Organic fertilization, for example with liquid manure, can compensate this loss of soil organic matter to some extent.





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