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Some engineers at the University of Washington have managed to create several such devices, allowing users to interact or communicate with each other battery-free by repurposing existing radio signals. It’s called ambient backscatter, a technique whereby a device appropriates wireless signals already ...

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Innovation : Wireless Devices that Don’t Require Batteries

Some engineers at the University of Washington have managed to create several such devices, allowing users to interact or communicate with each other battery-free by repurposing existing radio signals. It’s called ambient backscatter, a technique whereby a device appropriates wireless signals already bouncing around in the atmosphere and uses them both as a power source and a way to communicate with other devices. Ambient backscattering has similarities to RFID, but differs in that it doesn’t require a high-power signal source, has a relatively small footprint and can communicate device-to-device — unlike RFID, where tags have no ability to detect each others’ existence. I’m going to borrow the example in the official engineering paper that explains all of this in much finer detail: Say you have a TV tower out there generating radio waves and a couple of battery-free devices nearby — call them A and B. If A wants to send information to B, it reflects or “backscatters” the TV tower’s ambient signals, indicating a digital “0″ or “1″ by switching its antenna to either reflect or non-reflect the signal. The reflected signals form an alternative path ...   read more »    

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Recent Posts

Lamborghini Aventador J Concept

At the 2012 Geneva Motor Show, Automobili Lamborghini is presenting the most uncompromising open super sports car of its entire history. The Lamborghini Aventador J is a force of nature on wheels – supremely powerful and supremely open. The Aventador J offers its pilot and co-pilot an utterly indescribable experience of power and dynamics. At the same time, the 515 kW / 700 hp two-seater is a first class technology showcase, combining innovative solutions and brand new materials and demonstrating Automobili Lamborghini’s enormous expertise in carbon fiber technology.     The Lamborghini Aventador J is ...   

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HEART ATTACKS AND HOT WATER

  A very good article which takes two minutes to read. Heart Attacks And Drinking Warm Water This is a very good article. Not only about the warm water after your meal, but about Heart Attacks. The Chinese and Japanese drink hot tea with their meals, not cold water, maybe it is time we adopt their drinking habit while eating. For those who like to drink cold water, this article is applicable to you. It is nice to have a cup of cold drink after a meal. However, the cold water will solidify the ...   

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Frequently Errors Done After Eating Excessive

If you've met favorite food, sometimes we often forget ourselves and leads to eating too much. And if unwittingly overeating, then we tend to immediately check the weight and even put off eating the next day. In fact, it is a mistake that could be detrimental to health. Quoted detikHealth of readersdigest, here's some common mistakes made after overeating:1. WeighWeight can fluctuate every day, which can increase when we finished eating or drinking and may be reduced after a bowel movement. So, if you eat too much at dinner, do not jump on the scales the next ...   

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Tomato and soybean, Potent Weapons Prevent Prostate Cancer

The prostate gland is an organ found in men, which means that only men can have prostate cancer.Tomato-and-Soy-Powerful-Weapon-Prevent Prostate-Cancer-Cancer occurs when normal cells begin to grow and grow out of control. In a certain point the cells will develop proficiency level and form a lump called a tumor. Uncontrolled growth makes other organs surrounding vulnerable affected.Cancers that are already in the body take oxygen and nutrients your body needs to survive, so can weaken the immune system.In the U.S., prostate cancer is the second leading cause of death after lung cancer. It is estimated more than 29,000 people die each ...   

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Smartphone Disadvantage Canon and Nintendo

Through funding of conservative and efficient operations, Canon and Nintendo managed to avoid the kind of big losses due to investment failures that rocked the electronics industry in recent years. However, both companies are now faced with a new problem: competition with smartphones.In the announcement of the financial statements, on Wednesday, the two companies have felt the impact of the different smartphones. For Canon, digital camera shipments declined rapidly due to the demand rule the smartphone camera models automatically. Meanwhile, the latest Nintendo game systems have difficulty gaining momentum in the face of ...   

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The fruit is potent Prevent Diabetes & Heart Disease

According to a recent study, the content of compounds in these fruits can be a weapon against "metabolic syndrome", in which obesity and inflammation lead to serious health problems, according to Luis Cisneros-Zevallos, as well as expert scientists Texas AgriLife Research food."In recent years, obesity has become a major concern in the community because of health problems that seriously," said Cisneros-Zevallos, who is also a professor at Texas A & M University. "In the U.S., statistics show that approximately 30 percent of the population is obese, and these cases are increasing every year in alarming numbers," he added, as reported ...   

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Boston FBI bomb suspects identified in 2011 but did not prove he was involved in terror network

Boston FBI bomb suspects identified in 2011 but did not prove he was involved in terror networkOne of the bombing suspects Boston, Tamerlan Tsarnaev, has actually entered the FBI surveillance since two years ago. He never questioned, but not proven to be involved in the terror network.CNN reported on Friday, quoting an FBI official, stated that Tamerlan been interrogated in 2011 at the request of a state. He allegedly had links with extremist groups. Unspecified country requesting the examination.At that time, according to the FBI agent who declined to be named, they have examined all the documents Tamerlan, including travelogues, ...   

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Boston Bomb Suspect suitable CCTV

Boston - The FBI on Thursday released photos and video of two men who allegedly as a suspect in the deadly bombing at the Boston Marathon. They asked for help from the public to reveal his identity.The two men were photographed walking together near the marathon finish line before the explosion occurred, killing three people and injuring about 180 others. "Someone out there knows these people," said FBI agent.One of the two suspects were seen leaving a backpack bomb at the location, the FBI said. Both walked down Boylston Street near the finish line at close range.Man identified as "suspect ...   

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