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How to Power Up Electric Appliances Without Wires The problem of transporting electricity throughout large distances comes from the fact that conducting wires can break, snap in the wind, or when a tree falls on them, so every major storm knocks out most of the power grid, isolating important human communities. Trying to solve this problem, a team of students at MIT developed a new technique that can transmit power wirelessly to cell phones, laptops, MP3 players, household robots and other electronics. In one sense, the researchers are going where many scientists have gone before: the most famous, Nikola Tesla, tried to set up a power-beaming tower a century ago, but was never able to get it up and running. Marin Soljacic, a theoretical physicist at MIT, was inspired by a mobile phone with a rundown battery and began wondering if he could improve the efficiency of induction over longer distances and transmit power wirelessly so his cell phone could recharge without ever being plugged in. So far, the most important drawback of the wireless energy transmitting applications was the fact that sending energy in all directions can be tremendously wasteful, with a vast majority of power ending up squandered into free space. British households are wasting the annual output of a large power station by failing to switch off their flatscreen televisions, set-top boxes, and internet networks when they are not being used, according to Ofcom's latest Communications Market report. The equivalent output of the 1,500MW Didcot B power station in Oxfordshire could be saved each year if every home with a set-top box switched it off at night; that would conserve enough electricity to make 80bn cups of tea.Consumer electronics account for about a third of home energy use, according to the Energy Saving Trust, but that use is forecast to balloon to 45% by 2020 as more people buy more gadgets. The rise in average residential energy bills to just over 1,000 a year has made people more energy aware, but only when it comes to buying obviously power-hungry devices such as fridges and freezers, according to Ofcom.Almost three quarters of Britons, when quizzed by the regulator, classed themselves as caring about the environment, and more than half said they had compared the green credentials of white goods before making a purchase. But only 39% of people think about the environmental impact of a new TV, DVD player or computer. Within the British market for small household electrical appliances, replacement purchases lead the business. In the premium segment, the demand for more sophisticated products increasingly rises.At the same time environment and energy issues play a much more important role in the purchase decision. According to a study by the market research firm Keynote the positive trend will continue, but due to a strong competition in the low-price segment, sales growth will be rather modest. According to a study by market research group keynote, the British market for small household electrical appliances in 2007 had a volume to retail prices of approximately ￡950.9 million. This represented a growth of 2.4% over the previous year. In 2006, retail sales were ￡928.4 million (+2.7% compared to 2005). The sales growth is expected to fall half a percentage point (on an annual basis) behind the expected inflation rate until 2011. This reflects the continued deflationary trend that small household electrical appliances are subject to. Between 2007 and 2011, the market value is predicted to increase by 9% to 1.04 billion. This is an annual increase of 2.2%. We announced our intention to help migrant communities understand how to safely plug in foreign electrical appliances when using them in the UK, if necessary by using conversion plugs. Since then, we have heard from Fire & Rescue Services up and down the country about fires resulting from foreign plugs, such as the 2-pin Europlug, being forced into 13 A socket-outlets. One report came from Fife Fire and Rescue Service, which was called to a severe fire in a farm building.In recent years, the building had been used as overspill accommodation for migrant workers, with sufficient beds for 20 people. There were 15 residents occupying the building on the day of the fire. There was a limited power supply to the accommodation in the form of two extension reels, providing power to the ground and first floor areas. The reels, which were in good condition and fitted with a thermal cut-out, were fed from a double socket in the entrance hall. At the time of the fire, the ground floor extension reel had three appliances plugged in. The first floor extension reel had one appliance plugged in. In routine and living indoor environment, maybe there are many contaminations that you are not aware of. But they harm people health soundlessly. According to experts?? check and measure, the familiar contaminations are bacterium, virus, dust, pollen, odors, organic gas (such as benzene, toluene, formaldehyde, trichloro-ethylene etc), inorganic gas (such as ammonia, CO2, SO2, NO2 etc), cooking lampblack and smoke etc. Once people suck the contaminated air to a degree, they will have uncomfortable symptom such as dizziness, fluster, cancer, immunity decline, etc. Some disease such as the syndrome of office block, air conditioner syndrome, new residence syndrome etc have got people??s attention. According to the stat. of EPA in the USA, the concentration of indoor air contaminations is 2?C5 times higher than out door air, sometimes even gets to 100 times. The air quality is worrying especially in the hermetic room using air conditioner and central heating. Civil residents spend 90% time in the room, which indicates the influence of indoor air is more important than out door air and is closely linked to our health. Plaque buildup in the legs may be a warning sign of plaque buildup in other arteries, including those that supply blood to heart muscle and the brain, making heart attack and stroke more likely. In the new PAD study, some 2,500 U.S. adults age 50 and older were interviewed via telephone about their PAD knowledge. About a quarter of the group reported being "very" or "somewhat" familiar with PAD. In comparison, nearly 90% said they were very or somewhat familiar with high blood pressure, about 85% said they were very or somewhat familiar with high cholesterol, and 77% said they were very or somewhat familiar with diabetes. PAD affects up to 8 million Americans, note the researchers, who included the University of Minnesota's Alan Hirsch, MD. People who said they were familiar with PAD weren't very savvy about the condition. PAD in the lower extremities is where the arteries that delivery blood to the legs are partially or completely blocked because of plaque build-up. The condition affects about 1 in 16 adults aged 40 and over in the US. People with PAD are less able to do everyday things and decline more rapidly than the general population, said the authors in their background information. For some patients, PAD occurs with intermittent claudication (pain in the leg muscles that comes and goes), but according to the authors it is usually the patients without these symptoms that have greater functional impairment and decline. So when there is plenty of solar power available, the fridges switch themselves on. And when the clouds roll in, they switch themselves off. Engineer Sam West, who helped develop the device at CSIRO’s research centre in Newcastle, said using the humble fridge to store renewable energy was exciting. “A lot of people are surprised to hear that they can use (their fridge) for this kind of storage, usually they’re pretty interested,” the Sydney Morning Herald quoted West, as saying. However, one of the major obstacles to the widespread use of renewable energy is its reliability. West suggests that finding ways to store renewable energy would help address the issue. The “green fridge” was one way of doing it, in the form of thermal energy - or cold. The organisation hopes to roll out a trial version of the system, and said it was possible that one day all fridges would come equipped with the device. Slovenian appliance maker Gorenje has unveiled an iPod-ready fridge. The world’s first Made for iPod fridge freezer contains a dock set into the door and sitting between speakers. Plug an iPhone or an iPod touch into that dock and in addition to playing music and watching video, you can connect to the web, where you will find a new iGorenje portal that provides recipes and program |
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