Category: Crazy

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From Engadget: MIT ‘microthrusters’ are the size of a penny, could reposition tiny satellites

MIT 'microthrusters' are the size of a penny, could reposition tiny satellites

Bus-sized satellites require massive engines for even the slightest movements, but as far smaller structures become a possibility, a tiny driving mechanism can offer usable thrust. To serve this next-gen tech, MIT saw a need to develop “microthrusters,” which are each the size of a penny and can be mounted to tiny cubed satellites. With thruster components measuring a few microns each, the magnetic levitation system is able to accommodate 500 microscopic tips that emit ion beams in a very small package, serving to push two-pound structures through space. The tiny devices have not made their way into orbit yet, but they have been tested in a vacuum chamber. Because of their size, it’s possible to add several to each satellite, then enabling sophisticated movements for more precise turns.

There are currently two dozen “CubeSats” in orbit, each measuring only slightly larger than a Rubik’s cube, but without any thrusters to power them, positioning can’t be adjusted once they’re released. Because of their current location, CubeSats eventually burn up in the atmosphere, but once they’re released farther from Earth, they won’t be able to enter the atmosphere on their own, remaining in orbit as “space junk” even after completing their missions — micro thrusters could also serve to move these satellites closer to the planet so they can burn up during re-entry. There’s no word on when, or even if, MIT’s invention will make its way to the launchpad, but you can take a closer look in the demo video after the break.

 

from Engadget

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From Autoblog: Study: U.S. has fewer cars per person than Europe, but still uses twice as much energy

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Here’s a shocking statistic: The United States has fewer cars per capita than Italy, Germany, France, Spain, Belgium, Japan, Australia, New Zealand and 16 other countries. Even more dramatic is one of the potential causes: A declining American middle class.

According to an Atlantic report on a new study conduct by the Carnegie Endowment for International Peace, we’re ranked just 25th in the world in per-person car ownership. The actual number stands at 439 cars per 1,000 Americans. Further, the U.S. is an outlier when you compare the number of vehicles per capita to household consumption. While we have one of the highest rates of household spending, car buying is in decline here. It is this disparity that points to the widening income gap in the U.S. as a potential cause of our low rate of car ownership. Indeed, car ownership rates track with the size of a nation’s middle class, according to the report.

To add insult to injury, despite our low rates of car ownership, Americans still consume roughly twice as much energy as most Europeans.

 

from Autoblog

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From Wired Top Stories: Appeals Court OKs Warrantless, Real-Time Mobile Phone Tracking

A federal appeals court on Wednesday said the authorities do not need probable-cause warrants to enable them to track a suspect’s every move via the GPS signals emitted from a suspect’s mobile phone. The decision, a big boost for the government’s surveillance powers, comes as prosecutors are shifting their focus to warrantless cell-tower locational tracking of suspects in the wake of a Supreme Court ruling in January that law enforcement should acquire probable-cause warrants from judges to affix GPS devices to vehicles and monitor their every move.

from Wired Top Stories

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From Geeks are Sexy Technology News: QR Codes Under Threat From New Tech


Korean researchers say they’ve found a way to produce an alternative to QR codes that takes up less space, carries far more data, yet costs very little.

The solution involves a rectenna, which takes its name from ‘rectifying antenna’ rather than rectangular. It’s effectively a tiny AC/DC converter that works with microwave energy.

The idea is to harness the energy from a smartphone’s radio waves, convert it to a DC current, and use that to power the data transmission from a chip that can be put onto posters or other displays. It’s a similar concept to Near Field Communications, used in several smartphone “swipe to pay” or “tap to pay” tools, but would allow two-way communication.

The development from Sunchon National University and the Paru Printed Electronics Research Institute is to produce the rectenna using electronic inks. That greatly reduces costs as the rectennas (or rectennae) can simply be printed in rolls rather than produced in a more complicated fashion. The researchers believe each rectenna produced this way could cost as little as 1.5 cents.

Another benefit is that it’s possible to print an extra layer on top the rectenna that contains visual information for the user. This means there’s no need to either print a separate explanation of what the visible chip is for, or to take up space with a QR “barcode” and either explain it or hope people know what it is.

 

from Geeks are Sexy Technology News

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From Discover Magazine: Light-activated, Nano-sized Protein Factories Show Promise For Drug Delivery | 80beats

particle

Some of the most exciting medical research these days involves light. Light therapy for cancer, in which a tumor-seeking dye becomes toxic as soon as a light is switched on, manages to avoid slaughtering nearby healthy cells. Optogenetics—using light to turn on or off the expression of neurons—has advanced researchers’ understanding of neurological diseases.

Now, a recent paper is a reminder that light might someday be used for exquisitely tailored drug delivery: in this paper, tiny packages bearing all the molecular machinery to build a protein are idle when injected into mice, but spring into action when exposed to UV light.

The nanoparticles, which you can see a schematic of above, are little envelopes of cellular membrane, wrapped around a basic set of protein-building machinery and the gene for whatever you’d like manufactured—the researchers used a glowing fluorescent protein for their test. The gene can’t be accessed by the machinery because it is sealed into a loop by a piece of molecular adhesive, but shine a UV light on it, and the adhesive unsticks. Then the machinery transcribes the gene, and the protein is expressed. The researchers found that when they injected the particles into mice and …

 

from Discover Magazine

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From Engadget: Amateur archaeologist finds possible pyramids using Google Earth

Amateur archaeologist finds possible pyramids using Google Earth

While most Google Earth hobbyists are satisfied with a bit of snapping and geotagging, some have far loftier ambitions. Satellite archaeologist Angela Micol thinks she’s discovered the locations of some of Egypt’s lost pyramids, buried for centuries under the earth, including a three-in-a-line arrangement similar to those on the Giza Plateau. Egyptologists have already confirmed that the secret locations are undiscovered, so now it’s down to scientists in the field to determine if it’s worth calling the diggers in.

 

from Engadget