Archive for the ‘energy’ category: Page 7

Jan 19, 2023

Massive Star Formation Displays Self-Control

Posted by in categories: energy, space

When it comes to star formation in interstellar clouds of gas and dust, there’s an ongoing tug-of-war between two cloud-shaping processes. Young, massive stars inject energy into their surroundings in a way that both disrupts star formation by shredding the surrounding medium and encourages it by collecting dense gas shells that are prone to gravitational collapse. Which of these feedback processes dominates has been unclear, but new observations by Lars Bonne of NASA’s Ames Research Center and his colleagues suggest that stellar feedback significantly suppresses star formation. These findings—presented earlier this month at the 241st Meeting of the American Astronomy Society in Seattle—provide a missing piece in understanding why proposed rapid star-formation rates have long misaligned with observations.

Recent observations suggest that the formation of high-mass stars—ones greater than 8 times the mass of the Sun—is associated with the gravitational collapse of the surrounding cloud of molecular gas. This collapse leads to a high concentration of material, which should induce further star formation. However, the expected high star-formation rates are not observed, with typically only a few percent of the molecular cloud’s mass becoming new stars. “If stellar feedback indeed disperses the collapsing molecular cloud on the same timescale that new stars form, it could prevent these proposed high star-formation rates,” Bonne says. But predicting the impact and role of stellar feedback on the surrounding molecular cloud remains extremely difficult.

Now with data from NASA’s Stratospheric Observatory for Infrared Astronomy (SOFIA, now retired) and the Chandra X-ray Observatory, Bonne and his colleagues have tracked the process in real time. The first observation target was a star-forming complex called RCW 36, which is several light-years across and is located 2,900 light-years away in a molecular cloud within the constellation Vela. Like other star-forming complexes, RCW 36 consists of a large region of ionized atomic hydrogen (HII, pronounced “H-two”). This region includes a cluster of young stars and two low-density cavities that extend outward in opposite directions. A ring of gas forms a waist between the two cavities, resulting in an hourglass-like shape.

Jan 19, 2023

Researchers gain deeper understanding of mechanism behind superconductors

Posted by in categories: energy, physics

Physicists at Leipzig University have once again gained a deeper understanding of the mechanism behind superconductors. This brings the research group led by Professor Jürgen Haase one step closer to their goal of developing the foundations for a theory for superconductors that would allow current to flow without resistance and without energy loss. The researchers found that in superconducting copper-oxygen bonds, called cuprates, there must be a very specific charge distribution between the copper and the oxygen, even under pressure.

This confirmed their own findings from 2016, when Haase and his team developed an experimental method based on that can measure changes that are relevant to superconductivity in the structure of materials. They were the first team in the world to identify a measurable material parameter that predicts the maximum possible —a condition required to achieve superconductivity at . Now they have discovered that cuprates, which under pressure enhance superconductivity, follow the charge distribution predicted in 2016. The researchers have published their new findings in the journal PNAS.

“The fact that the transition temperature of cuprates can be enhanced under pressure has puzzled researchers for 30 years. But until now we didn’t know which mechanism was responsible for this,” Haase said. He and his colleagues at the Felix Bloch Institute for Solid State Physics have now come a great deal closer to understanding the actual mechanism in these materials.

Jan 19, 2023

This 3D-printed hydraulic turbine provides energy without blades

Posted by in categories: energy, food, military, sustainability

It generates energy by forcing the stream to form a vortex.

Without employing any blades, the transportable hydraulic turbine SETUR from Vortex Hydrokinetics serves as a power source. The water source could be rivers, tidal streams, ocean currents, or even canals.

Continue reading “This 3D-printed hydraulic turbine provides energy without blades” »

Jan 18, 2023

World’s first ammonia-electric semi packs as much energy as the Tesla

Posted by in categories: energy, transportation

Claiming a system-level energy density 5X higher than batteries, Amogy has rolled out “the world’s first ammonia-powered, zero-emission semi truck.” It holds about 900 kWh of energy, like the Tesla Semi, but you can refuel it in about eight minutes.

Jan 17, 2023

New method for designing tiny 3D materials could make fuel cells more efficient

Posted by in categories: chemistry, energy, nanotechnology, sustainability

Scientists from UNSW Sydney have demonstrated a novel technique for creating tiny 3D materials that could eventually make fuel cells like hydrogen batteries cheaper and more sustainable.

In the study published in Science Advances, researchers from the School of Chemistry at UNSW Science show it’s possible to sequentially “grow” interconnected in 3D at the nanoscale which have unique chemical and to support energy conversion reactions.

In chemistry, hierarchical structures are configurations of units like molecules within an organization of other units that themselves may be ordered. Similar phenomena can be seen in the , like in flower petals and tree branches. But where these structures have extraordinary potential is at a level beyond the visibility of the human eye—at the nanoscale.

Jan 17, 2023

First Demonstration of Energy Teleportation

Posted by in category: energy

It’s not just information that can move from one point in the universe to another, without passing through the space in between.

Jan 17, 2023

Extraordinary Discovery May Substantially Change Our Understanding of the Mechanism of Photosynthesis

Posted by in categories: chemistry, energy

Photosynthesis is the greatest natural process converting sunlight into chemical energy on a massive scale and maintaining life on Earth. There are basically two successive stages of oxygenic photosynthesis.

Photosynthesis is how plants and some microorganisms use sunlight to synthesize carbohydrates from carbon dioxide and water.

Jan 16, 2023

How the Radical, Fuel-Efficient ‘Flying V’ Airplane Could Replace Jumbo Jets

Posted by in categories: energy, transportation

I remember when this was a guitar.

The Flying-V, an experimental aircraft that promises significantly greater fuel efficiency over more conventional commercial jet designs, is moving towards a larger, more detailed version since the scaled, 10-foot model took flight in 2020 in Germany.

The 315-passenger jet flies like other commercial airliners its size, according to recent tests, but is 20 percent more fuel efficient. Plus, it just looks a lot cooler.

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Jan 16, 2023

This China-free lithium battery plant can power the next 100 years

Posted by in categories: energy, materials

Australia has all the key critical minerals to power the next 100 years.

An Australian-based startup, Recharge Industries Pty, is planning to build a A$300 million (US$210 million) factory that can build lithium-ion batteries that do not have materials imported from China, Bloomberg.

Though Australia is the world’s largest supplier of lithium, a vital battery metal, it currently sends most of its battery raw materials to be processed into components in China.

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Jan 15, 2023

Understanding Malware-as-a-Service (MaaS): The future Of cyber attack accessibility

Posted by in categories: business, cybercrime/malcode, energy

The content of this post is solely the responsibility of the author. AT&T does not adopt or endorse any of the views, positions, or information provided by the author in this article.

With the explosive growth of technology, businesses are more vulnerable than ever to malicious cyber attacks. And as cybercriminals become more sophisticated, new methods of attack are popping up left and right.

To add fuel to the fire, the average cost of a data breach increased from $3.86 million to $4.24 million in 2021. That’s costly enough to put most SMBs into the red. Not to mention the reputational damage it can cause for your brand.

Continue reading “Understanding Malware-as-a-Service (MaaS): The future Of cyber attack accessibility” »

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