More Educators Shutting Down Laptops in the Classroom

laptops in classroom

More colleges shutting down digital distractions in classrooms.

As a culture, we’re at an odd crossroads regarding personal computers. For years, educators have been clamoring to put technology in the hands of young students through partnerships with big tech companies, best symbolized by the One Laptop Per Child initiative.

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Chile’s Desert Key Source To Growing Demand Of Lithium

[youtube]http://www.youtube.com/watch?v=tIsX1-JErIA&feature=player_embedded[/youtube]

Chile’s Salar de Atacama desert is a major source for the world’s lithium, key ingredient in the batteries we use in our laptops, cell phones and other gadgets every day. And, key ingredient in batteries for a growing selection of electric and electric hybrid cars. As the demand for battery-powered devices increases, so does the demand for lithium and therefore the earthly resources that provide it. Check out this video from CBS about the production and demand.

 

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PolyPlus Developing Waterproof Lithium-Air Batteries

PolyPlus Developing Waterproof Lithium-Air Batteries

A prototype battery made by PolyPlus uses lithium metal as the anode and salt water as the cathode to power an LED. 

A company based in Berkeley, CA, is developing lightweight, high-energy batteries that can use the surrounding air as a cathode. PolyPlus is partnering with a manufacturing firm to develop single-use lithium metal-air batteries for the government, and it expects these batteries to be on the market within a few years. The company also has rechargeable lithium metal-air batteries in the early stages of development that could eventually power electric vehicles that can go for longer in between charges.

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Organic Solar Cells Starting To Take Off In The Renewable Energy Field

Organic Solar Cells Starting To Take Off In The Renewable Energy Field

 The flexible solar module is as small as the page of a book.

In the race to renewable energy, organic solar cells are now really starting to take off. They can be manufactured easily and cheaply, they have low environmental impact, and since they are compatible with flexible substrates, they could be used in many applications such as packaging, clothing, flexible screens, or for recharging cell phones and laptops.

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Cheaper And More Reliable Lithium-Ion Batteries

Cheaper And More Reliable Lithium-Ion Batteries

Lithium-ion cells that use polymer electrolytes can be affordably packaged in compact, flexible pouches  

A new incarnation of lithium-ion batteries based on solid polymers is in the works. Berkeley, CA-based startup Seeo, Inc. says its lithium-ion cells will be safer, longer-lasting, lighter, and cheaper than current batteries. Seeo’s batteries use thin films of polymer as the electrolyte and high-energy-density, light-weight electrodes. Lawrence Berkeley National Laboratory is now making and testing cells designed by the University of California, Berkeley spinoff.

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A Plastic That Cools

A Plastic That Cools 

 Films of a specially designed polymer, just 0.4 to 2.0 micrometers thick, can get colder or hotter by 12 °C when an electric field is removed or applied across them.

Thin films of a new polymer developed at Penn State change temperature in response to changing electric fields. The Penn State researchers, who reported the new material in Science last week, say that it could lead to new technologies for cooling computer chips and to environmentally friendly refrigerators.

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