Make calls with light or radio signals thanks to first battery-free cellphone

July 6, 2017 by  
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Imagine never having to charge your smartphone ever again. We may be one step closer to that battery-free future with new research from University of Washington engineers. They made a phone capable of calling people drawing on light or ambient radio signals. Associate professor Shyam Gollakota said they think it could be the “first functioning cellphone that consumes almost zero power .” No, it’s not magic – the University of Washington’s battery-free cellphone can function on just a few microwatts of power it harvests from RF signals coming from a base station around 31 feet away, or from light via a minute solar cell that’s about the size of a grain of rice. The team constructed their prototype from off-the-shelf components and have already used it to make Skype calls. Related: MIT’s New Battery-Free Chip Captures Energy From Light, Heat, And Vibrations at the Same Time The cellphone prototype is able to run on such low power in part because the team got rid of the step to convert analog signals into digital data – a process that sucks up a lot of power in modern cellphones. Their battery-free phone can make use of small vibrations from the speaker or microphone that come when a person is talking or listening while making a call. According to a university press release, “An antenna connected to those components converts that motion into changes in standard analog radio signal emitted by a cellular base station. This process essentially encodes speech patterns in reflected radio signals in a way that uses almost no power.” The team designed their own base station to receive and transmit radio signals. But that technology could be embedded in cell towers or even Wi-Fi routers in the future. Research associate Vamsi Talla said if every home has a Wi-Fi router – as many already do – “you could get battery-free cellphone coverage everywhere.” The research was recently published in the Proceedings of the Association for Computing Machinery on Interactive, Mobile, Wearable, and Ubiquitous Technologies . The team plans to keep working on the technology to increase the operating range and encrypt conversations. They also aim to stream video on battery-free cellphones. + Battery Free Phone Via the University of Washington Images via Mark Stone/University of Washington

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Make calls with light or radio signals thanks to first battery-free cellphone

Ontario greenhouses could lose $10M because of new cap-and-trade rules

July 6, 2017 by  
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Ontario , Canada has 2,900 acres of greenhouses that export over $1 billion of cucumbers, tomatoes, and green peppers to the United States. But greenhouse growers are saying they’ll suffer under the province’s new climate action plan. Their industry doesn’t only produce carbon dioxide (CO2) but consumes it as part of plants ‘ photosynthesis process, but unlike in British Columbia and Alberta, Ontario growers won’t receive a rebate for the carbon consumption, which could cost them around $10 million in 2017. In January Ontario put in place cap-and-trade rules in an effort to combat climate change . But greenhouse growers say the rules are unfair to them, since they consume CO2 instead of just emitting it. They’ll be charged $18 per metric ton of carbon. Related: Wind-powered vertical Skyfarms are the future of sustainable agriculture Ontario Greenhouse Vegetable Growers chair George Gilvesy told Financial Post, “We aren’t happy at all. We are using CO2 and the plants need CO2. Cap-and-trade is very bad policy . We are competing against the U.S. and Mexico, who do not have a carbon tax .” What would they prefer instead? A rebate, such as that given to growers in Alberta and British Columbia. Lawmakers in those provinces recognize greenhouses consume CO2 and offer a carbon tax rebate. BC Greenhouse Growers’ Association executive director Linda Delli Santi said British Columbia’s carbon tax used to cost her five-acre greenhouse $50,000 yearly and helped put it out of business. So growers successfully lobbied the government for a rebate. British Columbia’s then finance minister Michael de Jong said at the time, “Greenhouse growers are distinct from most others in that they need carbon dioxide and purposely produce it because it is essential for plant growth.” Ontario environment ministry spokesperson Gary Wheeler said the province knows greenhouses will be an important source of local food as the climate changes. He told Financial Post, “Ontario’s Climate Change Action Plan has committed up to $115 million to support the retrofit of agricultural facilities, including greenhouses. The investment will help the industry expand the use of innovative technologies and practices to reduce emissions .” Via Financial Post Images via Wikimedia Commons and Pixabay

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Ontario greenhouses could lose $10M because of new cap-and-trade rules

An Ordinary Cotton T-Shirt Could Someday Charge Your Cellphone

July 8, 2012 by  
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Photo by  Shutterstock Researchers at the University of South Carolina have developed a technique to turn an ordinary cotton t-shirt into a supercapacitor. The team, led by  Xiaodong Li , a professor of mechanical engineering, and  Lihong Bao , a postdoctoral associate, soaked the shirt in fluoride solution and baked it at high temperatures, which converted the cellulose fibers into activated carbon while the material to flex without breaking. Li expects that the technique could enable us to charge portable electronic devices like cell phones. READ MORE > Permalink | Add to del.icio.us | digg Post tags: cellphones , Clothes , clothing , ecouterre , energy-harvesting clothing , gadgets , human-powered clothing , mobile devices , renewable energy , supercapacitor , wearable technology

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An Ordinary Cotton T-Shirt Could Someday Charge Your Cellphone

Can a New Industry Standard Keep Cellphones Out of Landfills?

February 28, 2012 by  
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A new wireless-industry group — including Sprint Nextel — hopes that a new set of standards could boost the market for used cellphones and reduce the number that end up in landfills.

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Can a New Industry Standard Keep Cellphones Out of Landfills?

Are Your Mattress And Bedframe Killing You With EMF?

August 2, 2010 by  
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The Robinsons model the latest in tinfoil pyjamas Forget the tinfoil hat, it is time for tinfoil pyjamas. Scientific American tells us that the bed frames and box springs in most American beds are half the wavelength of TV and FM signals and are acting as antennae, causing skin and breast cancers on victims’ left sides, which are usually right were the maximum strength of the EMF would be…

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Are Your Mattress And Bedframe Killing You With EMF?

Ant Colony Living in a Scanner Is Recorded Over 5 Years (Video)

August 2, 2010 by  
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Image via Make Ants are amazing creatures. When we stop to really take a look at them, their status bumps up from pest to anything from hero to inspiration for biomimicry

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Ant Colony Living in a Scanner Is Recorded Over 5 Years (Video)

Nokia files patent for a cellphone powered by kinetic energy

March 6, 2010 by  
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Eco Factor: Cellphone to be powered by renewable energy.

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Nokia files patent for a cellphone powered by kinetic energy

SEAT debuts IBE all-electric concept at Geneva Motor Show

March 6, 2010 by  
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Eco Factor: Zero-emission concept car powered by electricity.

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SEAT debuts IBE all-electric concept at Geneva Motor Show

Smile Plastics Made From Cellphones, CDs and More

January 11, 2010 by  
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Way back in 2005 Petz and Leonora wrote about Plastic Fantastic! – Smile Plastics : “A chair made from kids wellies, a table made from mobile phones, a sink made from CDs, bowls made from coffee cups and a guitar made from yoghurt pots! These are just some of the products people have been inspired to make from the recycled plastic sheeting produced by UK based Smile Plastics.” They noted that not all of the products will be to everyone’s taste; it was loud and garish then and it remains so today. …

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Smile Plastics Made From Cellphones, CDs and More

Jessica Biel, Emile Hirsch, and Alexandra Cousteau Climbing Kilimanjaro – Day 5

January 11, 2010 by  
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Jessica Biel, Emile Hirsch, Isabel Lucas, Alexandra Cousteau, and Summit on the Summit crew in Tanzania. Credit: courtesy photo Environmental activists and celebrities have embarked on a week long trek up Mount Kilimajnaro (13,640 ft) in Tanzania to raise global awareness of the clean water crisis. Alexandra Cousteau, explorer, activist, and granddaughter of the legendary Jacques-Yves Cousteau–whom you may recognize from Planet Green’s Blue August or

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Jessica Biel, Emile Hirsch, and Alexandra Cousteau Climbing Kilimanjaro – Day 5

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