Treating peanut allergy bit by bit
Springing forward
Earth-Friendly Fabrics
Salamanders and Newts
Jay Watch
Who's Knocking?
Gliders in the Family
GSAT Mathematics Quiz, Teaching Math, teaching anxiety
Making Sense of Scents
The Electric Brain
Chemistry and Materials
Meteorites may have sparked life on Earth
Small but WISE
The solar system's biggest junkyard
Galaxies on the go
The hungry blob at the edge of the universe
Games with a Purpose
Dinosaurs and Fossils
An Ancient Feathered Biplane
A Big, Weird Dino
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
Plastic-munching microbes
Challenging the Forces of Nature
Killer Space Rock Snuffed Out Ancient Life
Snow Traps
Catching Some Rays
Giant snakes invading North America
Finding the Past
Traces of Ancient Campfires
Ancient Art on the Rocks
A Big Discovery about Little People
White Tip Sharks
Food and Nutrition
A Pepper Part that Burns Fat
Chocolate Rules
A Taste for Cheese
GSAT English Rules
Subject and Verb Agreement
Capitalization Rules
Who vs. That vs. Which
GSAT Exam Preparation Jamaica
The Annual GSAT Scholarships
GSAT Exam Preparation
Mastering The GSAT Exam
GSAT Exams Jamaica Scholarships
Access denied - Disabled boy aces GSAT
42,000 students will sit for the GSAT Exam in two weeks
Results of GSAT are in schools this week
GSAT Mathematics
Setting a Prime Number Record
It's a Math World for Animals
Play for Science
Human Body
Dreaming makes perfect
The tell-tale bacteria
Foul Play?
Camel Spiders
Hermit Crabs
Polar Bear
African Zebra
What Not to Say to Emerging Readers
Raise a Lifelong Reader by Reading Aloud
Children and Media
Strange Universe: The Stuff of Darkness
Echoes of a Stretched Egg
Extra Strings for New Sounds
Fast-flying fungal spores
Fungus Hunt
Getting the dirt on carbon
Copperhead Snakes
Space and Astronomy
Saturn's Spongy Moon
Catching a Comet's Tail
Witnessing a Rare Venus Eclipse
Technology and Engineering
Young Scientists Take Flight
Space Umbrellas to Shield Earth
Riding Sunlight
The Parts of Speech
What is a Noun
Adjectives and Adverbs
Problems with Prepositions
Where rivers run uphill
Seen on the Science Fair Scene
Revving Up Green Machines
Polar Ice Feels the Heat
Watering the Air
In Antarctica watch the heat (and your step)
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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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