Agriculture
Where Have All the Bees Gone?
Making the most of a meal
Hungry bug seeks hot meal
Amphibians
Poison Dart Frogs
Salamanders
Toads
Animals
How to Fly Like a Bat
Koalas, Up Close and Personal
Cacophony Acoustics
Behavior
Honeybees do the wave
A Light Delay
Talking with Hands
Birds
Finches
Hawks
Tropical Birds
Chemistry and Materials
Hair Detectives
Spinning Clay into Cotton
Sticking Around with Gecko Tape
Computers
A Classroom of the Mind
Two monkeys see a more colorful world
Supersonic Splash
Dinosaurs and Fossils
Meet the new dinos
Digging Dinos
Digging for Ancient DNA
E Learning Jamaica
2014 GSAT Results for Jamaican Kids
Results of GSAT are in schools this week
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Earth
Salty, Old and, Perhaps, a Sign of Early Life
A Great Quake Coming?
Challenging the Forces of Nature
Environment
Flu river
Missing Tigers in India
Snow Traps
Finding the Past
Childhood's Long History
The Taming of the Cat
Stone Age Sole Survivors
Fish
Lampreys
Mako Sharks
Sharks
Food and Nutrition
A Pepper Part that Burns Fat
Packing Fat
Allergies: From Bee Stings to Peanuts
GSAT English Rules
Who vs. That vs. Which
Whoever vs. Whomever
Who vs. Whom
GSAT Exam Preparation Jamaica
Tarrant High overcoming the odds
The Annual GSAT Scholarships
Scotiabank Jamaica Foundation Grade Six Achievement Test (GSAT) Scholarships
GSAT Exams Jamaica Scholarships
Access denied - Disabled boy aces GSAT
GSAT Scholarship
42,000 students will sit for the GSAT Exam in two weeks
GSAT Mathematics
How to Slice a Cake Fairly
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Play for Science
Human Body
Flu Patrol
A Sour Taste in Your Mouth
Disease Detectives
Invertebrates
Caterpillars
Daddy Long Legs
Giant Clam
Mammals
Minks
Lhasa Apsos
Wolves
Parents
What Not to Say to Emerging Readers
The Surprising Meaning and Benefits of Nursery Rhymes
Children and Media
Physics
Road Bumps
Einstein's Skateboard
Strange Universe: The Stuff of Darkness
Plants
White fuzzy mold not as friendly as it looks
Assembling the Tree of Life
Fungus Hunt
Reptiles
Geckos
Snakes
Crocodiles
Space and Astronomy
A Family in Space
A Puffy Planetary Puzzle
A Smashing Display
Technology and Engineering
A Satellite of Your Own
Reach for the Sky
Squeezing Oil from Old Wells
The Parts of Speech
Problems with Prepositions
What is a Verb?
What is a Preposition?
Transportation
Where rivers run uphill
Robots on a Rocky Road
Are Propellers Fin-ished?
Weather
Recipe for a Hurricane
Warmest Year on Record
Either Martians or Mars has gas
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Beyond Bar Codes

In the future, your refrigerator might alert you when the milk has gone sour. At the grocery store, cashiers won't need to scan bar codes because products will provide the data on their own. And packages and letters will carry electronic tags that send messages about where they are. To make such a world possible, scientists are working on a technology called radiofrequency identification (RFID). An RFID tag is an electronic device that can be glued to cereal boxes, milk cartons, envelopes, and other objects. The tags store information and use radio signals to communicate with computers or sensors. RFID tags already exist in the form of "smart cards" that store dollar amounts for riders of some public transportation systems. RFID chips have also been implanted in animals to identify them and allow owners to find them if the animals get lost. In these cases, the tags are made of silicon, the material from which most computer chips are made. However, silicon electronic tags are too expensive to be used as widely as printed bar codes are. Now, scientists from two companies in Europe have independently taken steps toward speeding up the spread of RFID technology. They have created tags completely out of plastic materials with the right kinds of electronic properties to transmit radio signals efficiently. The methods for making plastic tags are much cheaper than those for making silicon tags. The tags produced by scientists from Philips Research Laboratories in Eindhoven in the Netherlands are made from a type of plastic called pentacene and transmit radio waves at a frequency of 13.56 megahertz. The tags produced by PolyIC in Erlangen, Germany, use a different type of plastic. Neither type of tag is perfect yet. The plastic tags are still expensive and tricky to manufacture, and their radio signals don't travel very far. It may be a few years yet before plastic RFIDs make their way into nearly all of our everyday objects. But when they do, there will be an amazing amount of information zooming invisibly around us.E. Sohn

Beyond Bar Codes
Beyond Bar Codes








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