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Category: space – Page 870

Godspeed, Delta II.

NASA’s last Delta II rocket blasted into the atmosphere from Vandenberg Air Force Base in California on Saturday carrying the Ice, Cloud and land Elevation Satellite-2 (ICESat-2), Space.com reported, in the rocket’s 155th and final mission.

First entering service in 1989, the Delta II was NASA’s workhorse rocket, with Saturday’s launch capping off 100 successful launches in a row. (The last failure was in 1997, when a Delta II carrying a GPS satellite exploded seconds after leaving the pad.) As noted by the Verge, prior payloads have included the Spitzer and Kepler space telescopes, the Spirit and Opportunity Mars rovers, and the original ICESat.

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Japan’s government is facing serious fiscal challenges, but its main science ministry appears hopeful that the nation is ready to once again back basic research in a big way. The Ministry of Education (MEXT) on 31 August announced an ambitious budget request that would allow Japan to compete for the world’s fastest supercomputer, build a replacement x-ray space observatory, and push ahead with a massive new particle detector.

Proposed successor to Super-Kamiokande, exascale computer and x-ray satellite win backing.

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A few factors were taken into consideration. These included security conditions, climatic conditions at that time of year, the existence of potential scientific partners, and what facilities were available.

Senegal has made great strides in astronomy and planetary sciences in recent years. That’s been largely driven by the Senegalese Association for the Promotion of Astronomy, led by Maram Kaire. Some Senegalese researchers are also involved in the African Initiative for Planetary and Space Sciences, which I head up.

And so, NASA focused its efforts in Senegal. It sent 21 teams to the country, and six to Columbia, which had less favorable climatic conditions. One team, composed of Algerian astronomers from the Centre de Recherche en Astrophysique et Géophysique, also attempted to observe the occultation in the south of Algeria.

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Researchers are paving the way to total reliance on renewable energy as they study both large- and small-scale ways to replace fossil fuels. One promising avenue is converting simple chemicals into valuable ones using renewable electricity, including processes such as carbon dioxide reduction or water splitting. But to scale these processes up for widespread use, we need to discover new electrocatalysts—substances that increase the rate of an electrochemical reaction that occurs on an electrode surface. To do so, researchers at Carnegie Mellon University are looking to new methods to accelerate the discovery process: machine learning.

Zack Ulissi, an assistant professor of chemical engineering (ChemE), and his group are using machine learning to guide electrocatalyst discovery. By hand, researchers spend hours doing routine calculations on materials that may not end up working. Ulissi’s team has created a system that automates these routine calculations, explores a large search space, and suggests new alloys that have promising properties for electrocatalysis.

“This allows us to spend our time asking science questions, like, ‘How do you predict the properties of something,’ ‘What is the thermodynamic model,’ ‘What is the model of the system,’ or ‘How do you represent the system?’” said Ulissi.

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Engineers at the University of Maryland have created a thin battery, made of a few million carefully constructed “microbatteries” in a square inch. Each microbattery is shaped like a very tall, round room, providing much surface area – like wall space – on which nano-thin battery layers are assembled. The thin layers together with large surface area produces very high power along with high energy. It is dubbed a “3D battery” because each microbattery has a distinctly 3D shape.

These 3D batteries push conventional planar thin-film solid state batteries into a third dimension. Planar batteries are a single stack of flat layers serving the roles of anode, electrolyte, cathode and current collectors.

But to make the 3D batteries, the researchers drilled narrow holes are formed in silicon, no wider than a strand of spider silk but many times deeper. The were coated on the interior walls of the deep holes. The increased wall surface of the 3D microbatteries provides increased energy, while the thinness of the layers dramatically increases the power that can be delivered. The process is a little more complicated and expensive than its flat counterpart, but leads to more energy and higher power in the same footprint.

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A recent discovery by William & Mary and University of Michigan researchers transforms our understanding of one of the most important laws of modern physics. The discovery, published in the journal Nature, has broad implications for science, impacting everything from nanotechnology to our understanding of the solar system.

“This changes everything, even our ideas about planetary formation,” said Mumtaz Qazilbash, associate professor of physics at William & Mary and co-author on the paper. “The full extent of what this means is an important question and, frankly, one I will be continuing to think about.”

Qazilbash and two W&M graduate students, Zhen Xing and Patrick McArdle, were asked by a team of engineers from the University of Michigan to help them test whether Planck’s radiation law, a foundational scientific principle grounded in quantum mechanics, applies at the smallest length scales.

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The German start-up company ELiSE creates the DNA of a technical part. Based on the DNA, automated design processes are used to find the best solution which considers all predefined constraints and which is produced by additive manufacturing. Meet ELiSE at ESA’s Start-ups Zone powered by ESA space solutions at IAC 2018.

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