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Новости за 10.05.2024

Wildfires in old-growth Amazon forest areas rose 152% in 2023, study shows

Phys.org 

Although the rate of deforestation in the Brazilian Amazon fell in 2023, the region is faced with another challenge in the shape of fire affecting the native vegetation that has so far been spared destruction. An article published in the journal Global Change Biology warns that wildfires in old-growth forests rose 152% last year compared with 2022, despite a drop of 16% in the total number of fires throughout the Amazon and a 22% drop in deforestation.

Parity-time symmetry: Unlocking faster and stronger optical signal processing

Phys.org 

In the era of big data, signal processing faces significant challenges in terms of capacity and energy consumption due to the torrent of data to process. With over 90% of data transmitted through light, optical signal processing may offer unprecedented speed and energy efficiency compared to its electronic counterparts, as it operates without the need to convert the optical data stream into the electrical domain.

Visual observation of photonic Floquet–Bloch oscillations

Phys.org 

Recently, the exploration of Bloch oscillations (BOs) in periodically driven quantum systems, equivalent to "Floquet systems," has drawn tremendous attention because their exotic characteristics are profoundly distinct from those in static systems. Specifically, two types of Bloch-like oscillations have been investigated: quasi-Bloch oscillations (QBOs) and super-Bloch oscillations (SBOs).

Convergence science in the changing Arctic

Phys.org 

The Arctic is undergoing rapid changes that affect its natural environment, its people, and its role in global-scale natural processes. The interplay of climate change, industrialization, and other stressors makes the Arctic an intriguing subject for convergence science—an approach characterized by communication and integration across disciplines to address specifically defined problems.

There is an urgent need for democratizing knowledge to revolutionize global food systems, researchers argue

Phys.org 

In an article published today in Nature Food, a team of international experts delves into the urgent need for democratizing knowledge to revolutionize global food systems. Titled "Knowledge Democratization Approaches for Food Systems Transformation," the article emphasizes the necessity of incorporating traditional, Indigenous, and place-based knowledges into decision-making processes to address blind spots in current food system policies and actions.



GoT-ChA: New tool reveals how gene mutations affect cells

Phys.org 

A team co-led by researchers at Weill Cornell Medicine and the New York Genome Center has developed an advanced method for revealing how gene mutations disrupt the normal packaging of DNA. These structural changes, which alter patterns of gene activity in a cell, are known as epigenetic changes and can lead to malignancy.

Life expectancy study reveals longest and shortest-lived cats

Phys.org 

A team of pathobiologists at The Royal Veterinary College, in the U.K., working with a colleague from National Chung Hsing University, in Taiwan, has created a life expectancy chart for approximately 8,000 domestic cat breeds.

Strategy uses boron-nitrogen covalent bonds to enable high-performance narrowband electroluminescence

Phys.org 

To meet the demands of next-generation ultrahigh-definition displays, the organic light-emitting diodes (OLED) industry is actively pursuing the development of narrowband organic light-emitting materials. Within this effort, multiple resonance thermally activated delayed fluorescence (MR-TADF) materials based on boron-nitrogen fused polycyclic aromatic hydrocarbons have gained prominence for their energy efficiency and color purity, capturing the interest of both academia and industry.

Genetic study of cauliflower reveals its evolutionary history

Phys.org 

A team of plant-breeding specialists at Tianjin Academy of Agricultural Science's State Key Laboratory of Vegetable Biobreeding and other institutions has, via genetic analysis, revealed some of the changes that cauliflower has undergone throughout its evolution.

Why evolution often favors small animals and other organisms

Phys.org 

Small really does seem to be beautiful in evolutionary terms. The largest dinosaurs, pterosaurs and mammals may look impressive but these giants are vastly outnumbered by microscopic bacteria and single-celled algae and fungi. Small organisms are also ancient and incredibly resilient.

We need to consider conservation efforts on Mars, say researchers

Phys.org 

Astrobiology is the field of science that studies the origins, evolution, distribution, and future of life in the universe. In practice, this means sending robotic missions beyond Earth to analyze the atmospheres, surfaces, and chemistry of extraterrestrial worlds.





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