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Category: energy – Page 2

Based on time-series photometry from three different telescopes, an international team of astronomers has performed a detailed asteroseismology study of WD J0049−2525—the most massive pulsating white dwarf. The study, published May 22 on the arXiv pre-print server, resulted in the detection of new pulsation modes of this white dwarf.

White dwarfs (WDs) are stellar cores left behind after a star has exhausted its and represent the final evolutionary stage for the vast majority of stars. Observations show that most WDs have primary spectral classification DA as they exhibit hydrogen-dominated atmospheres. However, a small fraction of WDs showcases traces of heavier elements.

In pulsating WDs, luminosity varies due to non-radial gravity wave pulsations within these objects. One subtype of pulsating WDs is known as DAVs, or ZZ Ceti stars, which have only hydrogen absorption lines in their spectra.

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IN A NUTSHELL 🔬 Rice University researchers discovered copper boride, a novel two-dimensional material with transformative potential. 🧪 The study highlights copper boride’s strong covalent bonding and distinct electronic properties, setting it apart from other 2D materials. 🔋 This breakthrough could significantly impact electrochemical energy storage and applications in quantum information technology. 🌟 The discovery

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Several key moments in Earth’s history help us humans answer the question “How did we get here?” These moments also shed light on the question “Where are we going?” and offer scientists deeper insight into how organisms adapt to physical and chemical changes in their environment.

Among them is an extended evolutionary occurrence over 2 billion years ago, known as the Great Oxidation Event (GOE). This marked the first time that oxygen produced by photosynthesis—essential for the survival of humans and many other life forms—began to accumulate in significant amounts in the atmosphere.

If you traveled back in time to before the GOE (more than 2.4 billion years ago), you would encounter a largely anoxic (oxygen-free) environment. The organisms that thrived then were anaerobic, meaning they didn’t require oxygen and relied on processes like fermentation to generate energy. Some of these organisms still exist today in extreme environments such as acidic hot springs and hydrothermal vents.

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The natural protein, known as CelOCE, was developed at the Brazilian Center for Research in Energy and Materials and is ready for immediate integration into industrial processes. Breaking down plant material into usable fuel has long been one of science’s biggest energy challenges. At the heart o

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A research team led by physicists Ming Yi and Emilia Morosan from Rice University has developed a new material with unique electronic properties that could enable more powerful and energy-efficient electronic devices.

The material, known as a Kramers nodal line metal, was produced by introducing a small amount of indium into a layered compound based on tantalum and sulfur. The addition of indium changes the symmetry of the crystal structure, and the result promotes the novel physical properties associated with the Kramers nodal line behavior. The research, published in Nature Communications, represents a step toward low-energy-loss electronics and paves the way for more sustainable technologies.

“Our work provides a clear path for discovering and designing new quantum materials with desirable properties for future electronics,” said Yi, associate professor of physics and astronomy.

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An SMU-led research team has developed a more cost-effective, energy-efficient material called high-entropy oxide (HEO) nanoribbons that can resist heat, corrosion and other harsh conditions better than current materials.

These HEO nanoribbons— featured in the journal Science —can be especially useful in fields like aerospace, energy, and electronics, where materials need to perform well in extreme conditions.

And unlike high entropy materials that have been created in the past, the nanoribbons that SMU’s Amin Salehi-Khojin and his team developed can be 3D-printed or spray-coated at room temperature for manufacturing components or coating surfaces. This makes them more energy-efficient and cost-effective than traditional high-entropy materials, which typically exist as bulk structures and require high-temperature casting.

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Fuel cells that run on hydrogen are efficient and emit water vapor instead of exhaust. But so far, the technology is still expensive and therefore not competitive with the electric motor alternative.

Norwegian researchers have now figured out how they can accelerate competitiveness by reducing two critical components. This could make fuel cells both cheaper and more environmentally friendly.

The technology has great potential to cut in the transportation sectors, especially in heavy transport, the maritime sector and—in a somewhat longer timeframe—also in aviation.

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