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

From Droid Life: Google Enables Smart App “Delta” Updates in Google Play

A few hours ago, one of our readers noticed that his app updates were happening at a much quicker pace, making us wonder if the new “delta” app updates were live. Previewed back at this year’s Google I/O, smart app updates, otherwise known as “delta” updates were shown off as a way for developers to make the appliction updating process even easier. Instead of users having to download the entire application that includes the update, you only need to download the newest code inside the app. Genius.

For example, when games like Dead Trigger get updated, you have to re-download 100MB worth of data. With smart app updates, that 100MB can be turned into just 5-10MB, saving tons of data for everyone. As you will see in the video below, Instagram updates after downloading only 2MB or so of the full 13MB file and then installs.

You will notice this feature from now on in Google Play.

Click here to view the embedded video.

Also:  Android Police

Cheers Abesh!

from Droid Life