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Category: energy

Rubik’s-cube-sized CubeSats are a nifty, cheap way for scientists to put a research vessel into space, but they’re limited to orbiting where they’re launched – until now. Los Alamos researchers have created and tested a safe and innovative rocket motor concept that could soon see CubeSats zooming around space and even steering themselves back to Earth when they’re finished their mission.

Consisting of modules measuring 10 x 10 x 11.35 cm (3.9 x 3.9 x 4.5 in), these mini-satellites first launched in 2003, but are currently lacking in propulsion because they’re designed to hitch a ride into space with larger, more expensive space missions. They’re usually deployed along with routine pressurized cargo launches, usually into low orbits that limit the kinds of studies that CubeSats can perform.

This limitation is, of course, frustrating for space researchers. In fact, the National Academy of Science recently identified propulsion as one of the main areas of technology that needs to be developed for CubeSats.

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Given that the battery life of most multicopter drones typically doesn’t exceed 30 minutes of flight time per charge, there are many tasks that they simply can’t perform. Feeding them power through a hard-wired tether is one option, although that only works for applications where they’re hovering in place. Scientists at Imperial College London, however, are developing an alternative – they’re wirelessly transferring power to a drone as it’s flying.

For their study, the scientists started with an off-the-shelf mini quadcopter. They proceeded to remove its battery, add a copper coil to its body, and alter its electronics.

The researchers also built a separate transmitting platform that uses a circuit board, power source and copper coil of its own to produce a magnetic field. When placed near that platform, the drone’s coil acts as a receiving antenna for that magnetic field, inducing an alternating electrical current. The quadcopter’s rejigged electronics then convert that alternating current to direct current, which is used to power its flight.

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Electronics that can be embedded in clothing are a growing trend. However, power sources remain a problem. In the journal Angewandte Chemie, scientists have now introduced thin, flexible, lithium ion batteries with self-healing properties that can be safely worn on the body. Even after completely breaking apart, the battery can grow back together without significant impact on its electrochemical properties.

Existing lithium ion batteries for wearable electronics can be bent and rolled up without any problems, but can break when they are twisted too far or accidentally stepped on — which can happen often when being worn. This damage not only causes the battery to fail, it can also cause a safety problem: Flammable, toxic, or corrosive gases or liquids may leak out.

A team led by Yonggang Wang and Huisheng Peng has now developed a new family of lithium ion batteries that can overcome such accidents thanks to their amazing self-healing powers. In order for a complicated object like a battery to be made self-healing, all of its individual components must also be self-healing. The scientists from Fudan University (Shanghai, China), the Samsung Advanced Institute of Technology (South Korea), and the Samsung R&D Institute China, have now been able to accomplish this.

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In Brief:

  • Fedeli says that their electric Maserati could be released before 2020, maybe even 2019.
  • The EV is expected to be a sleek, low-volume coupe, with a target market differing from the four-door Tesla Fighter

Cruising in a Maserati screams luxury, comfort, elegance. Now Maserati will be associated with energy-efficiency, too.

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Germany isn’t content with relying on financial incentives to usher in an era of pollution-free cars. The country’s Bundesrat (federal council) has passed a resolution calling for a ban on new internal combustion engine cars by 2030. From then on, you’d have to buy a zero-emissions vehicle, whether it’s electric or running on a hydrogen fuel cell. This isn’t legally binding, but the Bundesrat is asking the European Commission to implement the ban across the European Union… and when German regulations tend to shape EU policy, there’s a chance that might happen.

The council also wants the European Commission to review its taxation policies and their effect on the “stimulation of emission-free mobility.” Just what that means isn’t clear. It could involve stronger tax incentives for buying zero-emissions cars, but it could also involve eliminating tax breaks for diesel cars in EU states. Automakers are already worried that tougher emission standards could kill diesels — remove the low cost of ownership and it’d only hasten their demise.

Not that the public would necessarily be worried. Forbes notes that registrations of diesels, still mainstays of the European car market, dropped sharply in numerous EU countries in August. There’s a real possibility that Volkswagen’s emission cheating scandal is having a delayed effect on diesel sales. Combine that with larger zero-emissions incentives and the proposed combustion engine ban, and it might not take much for Europeans to go with electric or hydrogen the next time they go car shopping.

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Just last month, physicists made the best case yet for why time crystals — hypothetical structures that have movement without energy — could technically exist as physical objects.

And now, four years after they were first proposed, scientists have managed to add a fourth dimension — the movement of time — to a crystal for the first time, giving it the ability to act as a kind of perpetual ‘time-keeper’.

First proposed by Nobel-Prize winning theoretical physicist Frank Wilczek back in 2012, time crystals are hypothetical structures that appear to have movement even at their lowest energy state, known as a ground state.

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trudeau

“Nobody likes taxes. So it’s a brave move by Justin Trudeau, Canada’s prime minister, to announce that the entire country must pay if it continues to burn fossil fuels.”

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