Apple to Open Mac App Store on January 6

January 6 Apple to Open Mac App Store - http://www.bestlaptopbattery.co.uk/

Apple will launch its Mac App Store on January 6, 2011, three months after CEO Steve Jobs announced it. The Mac App Store will be a desktop-bound replica of the wildly popular App Store for iOS devices, aiming to simplify the way Mac users discover and purchase applications for their computers.
The Mac App Store will be available in 90 countries and will offer free and paid applications in six categories (Education, Games, Graphics & Design, Lifestyle, Productivity, and Utilities). In a similar fashion to the iOS App Store, the Mac App Store will let users browse apps by downloads, staff favorites or what's hot. Customer ratings and reviews will also be available.
The Mac App Store will use the same iTunes account credentials as the iOS App Store, and will allow you to run any apps you purchase on any of your personal Macs, taking away the hassle of imputing serial numbers and licensing multiple computers. Another advantage of the Mac App Store is that the store itself will keep track of application updates, and will notify you, as with the iOS App Store.
However, just like the iOS App Store, developers who want their applications included in the Mac App Store will have to go through an approval process. This means that some applications Apple does not like, or which alter various features of Mac OSX, won't make it through. Developers who have their apps featured in the Mac App Store will get 70 percent of the sales revenue (Apple keeps 30 percent for the honor), and will not be charged for free apps and credit card fees.

"The App Store revolutionized mobile apps," says Steve Jobs. "We hope to do the same for PC apps with the Mac App Store by making finding and buying PC apps easy and fun. We can't wait to get started on January 6." The Mac App Store will be available to Mac OS X Snow Leopard users as a free download through Software Update.

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Microbatteries With Nanowire Hearts - bestlaptopbattery.co.uk

Microbatteries With Nanowire Hearts -http://www.bestlaptopbattery.co.uk


Rice University researchers have moved a step closer to creating robust, three-dimensional microbatteries that would charge faster and hold other advantages over conventional lithium-ion batteries. They could power new generations of remote sensors, display screens, smart cards, flexible electronics and biomedical devices.

battery

The batteries employ vertical arrays of nickel-tin nanowires perfectly encased in PMMA, a widely used polymer best known as Plexiglas. The Rice laboratory of Pulickel Ajayan found a way to reliably coat single nanowires with a smooth layer of a PMMA-based gel electrolyte that insulates the wires from the counter electrode while allowing ions to pass through.The work was reported this week in the online edition of the journal Nano Letters."In a battery, you have two electrodes separated by a thick barrier," said Ajayan, professor in mechanical engineering and materials science and of chemistry. "The challenge is to bring everything into close proximity so this electrochemistry becomes much more efficient."Ajayan and his team feel they've done that by growing forests of coated nanowires -- millions of them on a fingernail-sized chip -- for scalable microdevices with greater surface area than conventional thin-film batteries. "You can't simply scale the thickness of a thin-film battery, because the lithium ion kinetics would become sluggish," Ajayan said."We wanted to figure out how the proposed 3-D designs of batteries can be built from the nanoscale up," said Sanketh Gowda, a graduate student in Ajayan's lab. "By increasing the height of the nanowires, we can increase the amount of energy stored while keeping the lithium ion diffusion distance constant."The researchers, led by Gowda and postdoctoral researcher Arava Leela Mohana Reddy, worked for more than a year to refine the process."To be fair, the 3-D concept has been around for a while," Reddy said. "The breakthrough here is the ability to put a conformal coat of PMMA on a nanowire over long distances.
Even a small break in the coating would destroy it." He said the same approach is being tested on nanowire systems with higher capacities.The process builds upon the lab's previous research to build coaxial nanowire cables that was reported in Nano Letters last year. In the new work, the researchers grew 10-micron-long nanowires via electrodeposition in the pores of an anodized alumina template. They then widened the pores with a simple chemical etching technique and drop-coated PMMA onto the array to give the nanowires an even casing from top to bottom. A chemical wash removed the template.They have built one-centimeter square microbatteries that hold more energy and that charge faster than planar batteries of the same electrode length. "By going to 3-D, we're able to deliver more energy in the same footprint," Gowda said.They feel the PMMA coating will increase the number of times a battery can be charged by stabilizing conditions between the nanowires and liquid electrolyte, which tend to break down over time.


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