Inverse-design method enhances performance and reliability of on-chip spectrometers

Inverse-design method enhances performance and reliability of on-chip spectrometers

(a–c) Examples of CSSSs utilizing disordered photonic chips with brute force and random selection of structural parameters. (d–g) Spectrum reconstruction by four randomly designed spectrometers (S1–S4). Credit: Ang Li et al. In a study published in Engineering, researchers from Nanjing University of Aeronautics and Astronautics and Zhejiang University have unveiled a pioneering approach to designing … Read more

Machine learning accelerates discovery of high-temperature alloys

Machine learning accelerates discovery of high-temperature alloys

The ML-based framework for the MOO design of RHEAs. Credit: Cheng Wen et al. In a study recently published in Engineering, scientists from the University of Science and Technology Beijing, Guangdong Ocean University, and AiMaterials Research LLC have demonstrated a novel method to accelerate the discovery of refractory high-entropy alloys (RHEAs) compositions optimized for extreme … Read more

How climate change affects deer—experts draw findings from 20 years of research

How climate change affects deer—experts draw findings from 20 years of research

Red deer in a forest. Credit: INRAE – Anders Mårell Temperature, rainfall, snow and extreme weather events are all factors linked to climate change that directly affect wildlife. Understanding the impact of these factors on the physiology, population dynamics and distribution of different deer species is important for monitoring and protecting them. The scientists involved … Read more

High-energy-density cubic gauche nitrogen successfully synthesized at atmospheric pressure

High-energy-density cubic gauche nitrogen successfully synthesized at atmospheric pressure

Researchers synthesize high-energy-density cubic gauche nitrogen at atmospheric pressure. Credit: Wang Xianlong A research group led by Prof. Wang Xianlong from the Hefei Institutes of Physical Science of the Chinese Academy of Sciences, has successfully synthesized high-energy-density materials cubic gauche nitrogen (cg-N) at atmospheric pressure by treating potassium azide (KN3) using the plasma-enhanced chemical vapor … Read more

Ryugu samples call into question previous ideas about the formation of carbon-rich asteroids

Ryugu samples call into question previous ideas about the formation of carbon-rich asteroids

About two million years after the formation of the Solar System, the first carbonaceous chondrites made of dust, chondrules, early condensates and iron-nickel grains agglomerated outside the orbit of the still young Jupiter. About two million years later, the CI chondrites were formed by photoevaporation. They incorporated a particularly large number of iron-nickel grains. Credit: … Read more

Exploring the role of hydrogen sulfide in the expression of iron uptake genes in E. coli

Exploring the role of hydrogen sulfide in the expression of iron uptake genes in E. coli

Intracellular H2 S accumulation regulates iron uptake activity via YgaV and is crucial for antibiotic resistance in E. coli. Credit: Tokyo Institute of Technology Antibiotic resistance and oxidative stress response are important biological mechanisms that help bacteria thrive, especially pathogenic bacteria like Escherichia coli. Hydrogen sulfide (H2S), a chemical messenger molecule, regulates several intracellular activities … Read more

Green and digital transitions are putting environmental problems on the back burner, says study

Green and digital transitions are putting environmental problems on the back burner, says study

Graphical summary of the coupling of environmental and digital policies. Credit: Environment and Planning E: Nature and Space (2024). DOI: 10.1177/25148486241258046 The European Green Deal is a package of political initiatives to ensure that the EU reaches climate neutrality by 2050. Faced with this challenge, the parallel goals of the green and digital transitions are … Read more

Research team succeeds in ultra-fast switching of tiny light sources

Research team succeeds in ultra-fast switching of tiny light sources

A strong light pulse in the terahertz range separates charged luminous trions into individual electrons and neutral excitons. Credit: Giuseppe Meneghini Extremely thin materials consisting of just a few atomic layers promise applications for electronics and quantum technologies. An international team led by TU Dresden has now made remarkable progress with an experiment conducted at … Read more

Nonlinear optical metasurface achieves electrically tunable third-harmonic generation

Nonlinear optical metasurface achieves electrically tunable third-harmonic generation

Electrically tunable nonlinear polaritonic metasurface for THG. Credit: Light: Science & Applications (2024). DOI: 10.1038/s41377-024-01517-y A recent study has unveiled a transformative nonlinear optical metasurface technology. This new technology, characterized by structures smaller than the wavelength of light, paves the way for significant advancements in next-generation communication technologies, including quantum light sources and medical diagnostic … Read more

Scientists identify structural basis of stitched-together protein complexes that recycle most proteins in cells

Scientists identify structural basis of stitched-together protein complexes that recycle most proteins in cells

Stepwise assembly of the 20S proteasome is mediated by multiple chaperone interactions. Credit: Nature Communications (2024). DOI: 10.1038/s41467-024-52513-0 Scientists at Sanford Burnham Prebys have developed a clearer picture of how crucial machinery in the human cell’s recycling process for obsolete and misshapen proteins—known as proteasomes—are formed. “Proteasomes are absolutely essential for health,” said Jianhua Zhao, … Read more