May 16, 2012 Jackson Holahan: The Aleppo Codex Jonathan Tobin : Iran Declares Victory in Nuclear Talks Kiplinger Reports, Summarized Anne Kates Smith: 7 Stocks That Let You Sleep Tight Carmen Terzic, M.D., Ph.D. : Mayo Clinic Medical Edge: A variety of exercises can help improve balance Melissa Healy: National strategy on Alzheimer's disease aims to halt it by 2025 The Kosher Gourmet by Joyce White : GOODNESS GRACIOUS: GREENS! 4 winning recipes that are no longer just for down-home folks (Includes expert tips & techniques) May 15, 2012 Dennis Prager: God and Man at (and for) Liberty Kristen Chick: Obama administration resumes arms sales to Bahrain despite serious unresolved human rights issues. Activists feel abandoned Pat Mertz Esswein: Homes are now affordable again and mortgage rates are low. What you need to know before you buy Kathy Kristof: Our Practical Investor Fights Inflation with These 6 Investments Sue Hubbard, M.D.: The Kid's Doctor: Lactose intolerant young child? 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Jewish World Review How Stuff Works: How dog ID chips work By Marshall Brain http://www.JewishWorldReview.com | (MCT) Last month the Brain family adopted a dog from the local animal shelter. And when we picked her up after being spayed, we discovered that she had been "chipped." In other words, the shelter had inserted a microchip under the skin in her neck. By holding a scanner over her, the vet could read her new ID number on the screen. The reason why the shelter does this is because the shelter wants to return as many stray dogs as possible. At our local shelter, they have to kill an average of 500 dogs and cats every month because of overcrowding. Any dog or cat that they can return to its owner is one less animal they have to kill. Tags on collars can get lost or mangled. The microchip can't get lost and will last for decades. And it is so small - about the size of a grain of rice - that the dog doesn't even know it is there. The technology behind these chips is fascinating. They are called Radio Frequency Identification, or RFID, chips. Sealed inside a tiny glass cylinder is an even tinier radio transmitter along with an incredibly small computer. The computer contains the unique ID number. It sends the number to the radio transmitter, which broadcasts it to the scanner. Obviously this tiny radio is not very powerful, so the scanner has to be just an inch or two away for it to pick up the transmission. But it is a transmission nonetheless. So the scanner picks up the radio's signal, decodes the number and displays it. But where do the computer and radio transmitter get their power? There is no battery embedded in the dog's neck. This is the ingenious part of an RFID chip. The scanner actually sends out a fluctuating magnetic field into the dog. The RFID chip contains another antenna that picks up this magnetic energy and converts it into electricity. This electricity then powers the computer and radio transmitter. So the dog's chip is sitting there, doing nothing, until a scanner comes along. The scanner provides the chip with the wireless power it needs to send out its unique ID number. Then the chip goes dormant once again. It's funny to think that dogs were one of the very first users of RFID technology. Today RFID chips are appearing in all sorts of places because the technology gets less and less expensive every day. For example, you may use a badge at work that lets you "badge in" to different parts of the building. The badge contains an RFID chip, and you hold your badge up to an RFID scanner. You may have a parking pass that works the same way. If you frequently go through toll booths for a bridge or a road, you may have an RFID chip on your windshield that makes payment automatic. And many cars now use RFID chips in the key. Lots of credit cards now contain RFID chips as part of a system called Paypass. You wave the card over an RFID reader to make a payment. But the place where RFID is expected to really shine is in the grocery store. Right now your local grocery or discount mart is using bar codes to scan items. And you might have noticed that these bar codes are not perfect, especially if you have ever tried your hand at scanning them in a self-checkout line. You have to find each bar code and hold it right in front of the scanner at the correct angle. Even so, you may be to present it two or three times for the bar code scanner to see it. Soon the price of RFID tags will fall so low that every item in the store will have one. Simply putting the items on the conveyor belt at the check out line will get the RFID chips scanned automatically. Today many stores are already using RFID at the case level in the warehouse or stockroom, because RFID speeds up the whole inventory tracking process. Every weekday JewishWorldReview.com publishes what many in the media and Washington consider "must-reading". Sign up for the daily JWR update. It's free. Just click here. Comment by clicking here. Previously: How President Obama's limousine works How emergency power works How aircraft carriers work How antibiotics and vaccines work How mucus works How iron and steel work How aspirin works How igloos work How the Predator UAV works How retention ponds work How water absorbers work How melamine works How digital music works How coal mining works How an economic depression works How the liver works How 3D movies work How oil pipelines work How jet packs work How seismographs work How Olympic technology works How Personal Rapid Transit works How 3G works How the Global Position System (GPS) works How octane works How cruise missiles work How submarines work How miles work How octane works How food preservation works How beer works How holding your breath works How smoke detectors work How heat pumps work How your night vision works How concentrating solar collectors work How your key fob works How the common cold works How the Large Hadron Collider Works How making a TV show works How dry cleaning works How exoskeletons work How an oil refinery works How landfills work How the Orion spacecraft works The cutting edge in HDTV Redefining the CD How the HDMI cable scam works How glow-in-the-dark toys work How the subprime mortgage crisis works How gift cards work How Tasers work How giant TV screens work How foreclosure works How Air Force One works How wildfire fighting works How vitamins work How ejection seats work How reattaching limbs works How hot air balloons work How paparazzi work How counterfeiting works How CDs work How the Edsel worked How Stinger missiles work How hybrid cars work How sharks work How mosquitoes work How diesel engines work How water towers work How the Dawn mission works How Kassam rockets work How the North American Eagle works Why aren't we flying to work? How tofu and soy milk work How Colony Collapse Disorder works How airbags work How the U.S. income tax works How gum works How caffeine works How Daylight Saving Time works How a cruise missile works How snow making works © 2007, How Stuff Works Inc. Distributed by McClatchy-Tribune Information Services.

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