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Category: energy – Page 360

While the US military continues to develop new and awesome ways of blowing aerial drones to smithereens, not many of these systems can easily be adapted to use in the civilian realm. That’s why Battelle has developed the DroneDefender, a shoulder-mounted rifle that knocks UAVs offline with a barrage of radio waves.

“It can help us in numerous settings, from the White House lawn to bases and embassies overseas; from prisons and schools to historic sites,” Alex Morrow, technical director on the project, said in a statement. “It easily and reliably neutralizes the threat.” The weapon weighs roughly 10 pounds and can target drones up to 400 meters away. When the trigger is pulled, the gun emits a blast of electromagnetic energy tuned to the most common GPS and ISM frequencies, safely disabling the drone and preventing it from accepting any additional commands from its operator. This is especially helpful if the drone is equipped with an improvised explosive device.

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“The world is facing some huge problems. There’s a lot of talk about how to solve them. But talk doesn’t reduce pollution, or grow food, or heal the sick. That takes doing. This film is the story about a group of doers, the elegantly simple inventions they have made to change the lives of billions of people, and the unconventional billionaire spearheading the project.”

A team of physicists has proposed a way of teleporting energy over long distances. The technique, which is purely theoretical at this point, takes advantage of the strange quantum phenomenon of entanglement where two particles share the same existence.

The researchers, who work out of Tohoku University in Japan, and led by Masahiro Hotta,describe their proposal in the latest edition of Physical Review A. Their system exploits properties of squeezed light or vacuum states that should allow for the teleportation of information about an energy state. In turn, this teleported quantum energy could be made useable.

Unlike teleportation schemes as portrayed in Star Trek or The Fly, this type of teleportation describes entanglement experiments in which two entangled particles are joined despite no apparent connection between them. When a change happens to one particle, the same change happens to the other. Hence, the impression of teleportation. Physicists have conducted experiments using light, matter, and now, energy.

According to Hotta, a measurement on the first particle injects quantum energy into the system. Then, by carefully choosing the measurement to do on the second particle, it is possible to extract the original energy.

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What is ideally needed is a bulk electricity storage device which is scalable to gig watt, which is reliable, efficient and economically viable, but more importantly, it should be environmentally friendly. One such promising technology on the horizon with a capability to compete with pumped hydro and gas turbines for peaking and immediate power generation is storing energy by gravity.

A gravity storage system consist of a pair of two deep shafts one large, and the other smaller in diameter connected at the top and bottom, forming a closed formed circuit via a reversible pumpturbine, as seen in Figure 1. The shafts are filled with water, which acts as a medium for energy transfer, and the bigger shaft is fitted with a huge steel piston filled with reinforced rock and concrete. The whole device operates on the simple action of vertical motion of piston.

During the availability of surplus electricity, the reversible pumpturbine converts the grid power supplied by a dual purpose motorgenerator to potential energy, by pumping the water in the larger shaft to raise the heavy piston. At times of need, like during peak demand, this stored potential energy is converted back to electrical energy by allowing the piston to descend, which in the process energizes the water molecules to rotate the turbinepump blades, leading to power generation at the generatormotor end.

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A British tech company has come up with a new way of powering wearables and smart home devices: a device called the Freevolt, which can harvest the ambient energy from radio waves and turn it into a small amount of electricity for low-energy gadgets to tap into.

As CNET reports, this level of energy can’t keep a smartphone running, but it could be enough to power that remote sensor on your garden gate. If sensors and beacons have a wireless energy source plus wireless connectivity, it opens up more possibilities for kitting out our homes and gardens with these kind of devices.

“Companies have been researching how to harvest energy from Wi-Fi, cellular, and broadcast networks for many years,” Drayton Technologies CEO and chairman, Lord Drayson, said in a press statement. “But it is difficult, because there is only a small amount of energy to harvest and achieving the right level of rectifying efficiency has been the issue — up until now. For the first time, we have solved the problem of harvesting usable energy from a small radio frequency signal.”

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“A living being, but not alive.” The Dutchman artist Theo Jansen creates these structures which move through the strength of the winds. He uses wood, PET bottles and rags to transform wind energy in a synchronized motion that looks like their creations have a life of its own! Sensational!

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Calculations show that if the wormhole’s throat is orders of magnitude longer then the width of its mouth, it does indeed create Casimir energy at its centre.

Cambridge Physicists Find Wormhole Proof:-Physicists at the University of Cambridge have established a theoretical groundwork for the reality of wormholes, which are pipes that join two different points in space-time. If a part of information or physical object could pass through the wormhole, it might open the door to time travel or immediate communication through huge distances. “But there’s a problem: Einstein’s wormholes are extremely unsteady, and they don’t stay open long enough for something to pass over.” In 1988, physicists reached the deduction that a type of negative energy called Casimir energy might keep wormholes open.

The hypothetical solution established at Cambridge has to do with the properties of quantum energy, which conveys that even vacuums are teaming by means of waves of energy. If you visualize two metal plates in a vacuum, some waves of energy would be excessively big enogh to fit between the plates, meaning that the space-time among the plates would have negative energy. “Under the right circumstances, could the tube-like shape of the wormhole itself generate Casimir energy? Calculations show that if the wormhole’s throat is orders of magnitude longer then the width of its mouth, it does indeed create Casimir energy at its centre.”

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Sick of waiting an hour for your phone to charge before you leave the house? Researchers at Nanyang Technological University in Singapore have come up with the best solution yet — a lithium ion battery that charges to 70 percent in just two minutes.

Even better, it also lasts for 20 years, and will reportedly be available to the public within two years.

Rechargeable lithium ion batteries are already common in our mobile phones, tablets and laptops — but most only last around 500 recharge cycles, which is around two to three years of typical use. And at the moment batteries take around two hours to fully charge.

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