Science

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Supersonic Noise

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Stanford scientists develop high-efficiency zinc-air battery

Stanford University scientists have developed an advanced zinc-air battery with higher catalytic activity and durability than similar batteries made with costly platinum and iridium catalysts. The results, published in the May 7 online edition of the journal Nature Communications, could lead to the development of a low-cost alternative to conventional lithium-ion batteries widely used today.

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This is a rechargeable zinc-oxide battery in a tri-electrode configuration with cobalt-oxide/carbon nanotube and iron-nickel/layered double hydroxide catalysts for charge and discharge, respectively.

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NASA's GRAIL Mission Solves Mystery of Moon's Surface Gravity

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Using a precision formation-flying technique, the twin GRAIL spacecraft mapped the moon's gravity field, as depicted in this artist's rendering.

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Patent for Coaxial Nanofibre Production: Scientists from Contipro have patented new jet for effective coaxial nanofibers production

Although nanofibres are thousands of times finer than a human hair, with current technology scientists can produce fibres of this size where the inside is made with a different material from the outer coating. However, this success has mainly been limited to laboratory, as the switch to full-scale production has proved to be a very difficult technical problem.

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Boeing Completes New Spacecraft, Rocket Milestones

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The CST-100 spacecraft awaits liftoff aboard an Atlas V launch vehicle in this artist's concept.

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NASA's WISE Mission Finds Lost Asteroid Family Members

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This artist's conception shows how families of asteroids are created. Over the history of our solar system, catastrophic collisions between asteroids located in the belt between Mars and Jupiter have formed families of objects on similar orbits around the sun.

http://www.jpl.nasa.gov/news/news.php?release=2013-179&rn=news.xml&rst=3806

內湖道館2021陳鵬程

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NASA IRIS: Improving Our View Of the Sun

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This image from the Japan Aerospace Exploration Agency’s Hinode mission shows the lower regions of the sun’s atmosphere, the interface region, which a new mission called the Interface Region Imaging Spectrograph, or IRIS, will study in exquisite detail. Where previous missions have been able to image material at only a few predetermined temperatures in this region, IRIS will observe a wide range of temperatures from 5,000 kelvins to 65,000 kelvins (8,540 F to 116,540 F), and up to 10 million kelvins (about 18 million F) during solar flares. Its images will resolve structures down to 150 miles across.

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Diamonds, nanotubes find common ground in graphene: Hybrid created by Rice, Honda Research Institute shows nanotubes can grow on anything

What may be the ultimate heat sink is only possible because of yet another astounding capability of graphene. The one-atom-thick form of carbon can act as a go-between that allows vertically aligned carbon nanotubes to grow on nearly anything.

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Rice University and the Honda Research Institute use single-layer graphene to grow forests of nanotubes on virtually anything. The image shows freestanding carbon nanotubes on graphene that has been lifted off of a quartz substrate. One hybrid material created by the labs combines three allotropes of carbon – graphene, nanotubes and diamond – into a superior material for thermal management.

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Biodegradable Nanocomposites Synthesized for Food Stuff Packaging

Iranian researchers from Tarbiat Modarres University succeeded in the production of biodegradable nanocomposites by using nanoparticles which can be used in the packaging industry.

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A new self-assembled nanostructure that can survive very hot or saline environments

Nanostructures that assemble themselves from polymer molecules could prove to be useful tools in chemistry and industry. However, it is difficult to develop structurally robust self-assembling materials because they are often adversely affected by their surroundings.

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Fig. 1 The team used linear and cyclic block copolymers to create flower-shaped micelles. The cyclic-based micelles withstood considerably higher temperatures and salinity levels, and could have numerous applications in industry and green chemistry.