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Archive for the ‘materials’ category: Page 169

Aug 28, 2015

Physics-Astronomy: NASA’s Warp-Drive Solution for Faster-Than-Light Space Travel

Posted by in categories: materials, space travel, time travel

Agreeing to state-of-the art theory, a warp drive might cut the travel time between stars from tens of thousands of years to only weeks or months. Harold G. White, a physicist and innovative propulsion engineer at NASA and other NASA engineers are working to regulate whether faster-than-light travel — warp drive — might soon be possible. The group is trying to some extent warp the course of a photon, altering the distance it travels in a definite area, and then detecting the change with a device called an interferometer.

In 1994, a Mexican physicist, Miguel Alcubierre, speculated that faster-than-light speeds were conceivable in a technique that did not deny Einstein by binding the growth and reduction of space itself. Under Dr. Alcubierre’s theory, a ship still couldn’t surpass light speed in a native region of space. But a theoretical thrust system he sketched out operated space-time by producing a so-called “warp bubble” that would inflate space on one side of a spacecraft and contract it on another.

Image source: With thanks to Shutterstock.com.

Continue reading “Physics-Astronomy: NASA's Warp-Drive Solution for Faster-Than-Light Space Travel” »

Aug 27, 2015

Electrical circuit made of gel can repair itself

Posted by in categories: electronics, energy, materials, robotics/AI

(Phys.org)—Scientists have fabricated a flexible electrical circuit that, when cut into two pieces, can repair itself and fully restore its original conductivity. The circuit is made of a new gel that possesses a combination of properties that are not typically seen together: high conductivity, flexibility, and room-temperature self-healing. The gel could potentially offer self-healing for a variety of applications, including flexible electronics, soft robotics, artificial skins, biomimetic prostheses, and energy storage devices.

The researchers, led by Guihua Yu, an assistant professor at the University of Texas at Austin, have published a paper on the new self-healing in a recent issue of Nano Letters.

The new gel’s properties arise from its hybrid composition of two gels: a supramolecular gel, or ‘supergel’, is injected into a conductive polymer hydrogel matrix. As the researchers explain, this “guest-to-host” strategy allows the chemical and physical features of each component to be combined.

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Aug 26, 2015

This startup can grow metal like a tree, and it’s about to hit the big time

Posted by in categories: 3D printing, materials

A little know startup in Seattle could do for metal what 3D printing is doing for other materials like plastic.

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Aug 24, 2015

MIT’s New 3D Printer Can Print 10 Materials Simultaneously

Posted by in categories: 3D printing, materials

Fab news, everyone!

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Aug 23, 2015

Scientists Grow Nearly Defect Free High Quality Graphene from Tea Tree Extract

Posted by in category: materials

Better yet, the fabrication of the graphene took only a few seconds to a few minutes.

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Aug 18, 2015

Graphene Just The Tip Of The 2D Materials Iceberg For Clean Technology

Posted by in category: materials

Graphene is not the only game in town.


Two new developments show that the race is on to replace silicon as the go-to semiconductor of choice with other 2D materials if not graphene.

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Aug 18, 2015

At Last, a Wearable You Will Want to Wear — By Chander Chawla | Forbes

Posted by in categories: 3D printing, business, innovation, materials, media & arts, robotics/AI, wearables

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“I am excited to introduce the first wave of TechLuxe in a form of a resin handbag with an LCD video screen. The idea is to radically bring technology to fashion, but with creative beauty within a functional beautifully designed bag.”

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Aug 15, 2015

Temperature-controlled hydrogel can walk

Posted by in category: materials

Scientists have developed a new hydrogel that stretches and contracts just like an artificial muscle. The team created an L-shaped object made out of the hydrogel and immersed it in a water bath. When the water’s temperature was varied, it slowly “walked” forward.

The researchers at the Riken Center for Emergent Matter Science in Japan got the hydrogel to move by tweaking its properties. Polymers like hydrogels carry large amounts of water within their structure which gives them the capacity to respond to variations in environmental factors such as acidity, voltage and temperature. Typically, this response time is quite slow, as the hydrogel must excrete or absorb water to correspondingly shrink or expand.

The Japanese scientists altered the new hydrogel to enable it to contract only in one dimension while expanding in another. Since the hydrogel doesn’t contract equally in every direction, it’s able to alter its shape without absorbing or excreting any water. To test the hydrogel’s properties, the team created an L-shaped polymer and changed the temperature repeatedly to observe its response.

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Jul 14, 2015

The World’s First 3D Printed Building To Be Built In Dubai — Ana Alves WTVOX

Posted by in categories: 3D printing, architecture, engineering, materials

DUBAI TO BUILD WORLD’S FIRST 3D PRINTED OFFICE

Fast-growing Dubai, where something new is always being added to the skyline, may have found a way to make construction move even faster.

In a bid to become a global hub of innovation, Dubai announced plans to build an office that will be “the most advanced 3-D printed structure ever built at this scale” and the first to be put into actual use.

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Jun 15, 2015

Smart urban planning in Amsterdam — Feargus O’Sullivan | CityLab

Posted by in categories: architecture, economics, energy, engineering, environmental, government, materials, policy, science, sustainability

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“Instead of treating Amsterdam as complete and starting again elsewhere, the IJburg plan has managed to find more space in a city that thought it had no more left.”

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