Agriculture
New Gene Fights Potato Blight
Middle school science adventures
Getting the dirt on carbon
Amphibians
Toads
Salamanders and Newts
Frogs and Toads
Animals
Polar Bears in Trouble
Blotchy Face, Big-Time Wasp
Color-Changing Bugs
Behavior
Pondering the puzzling platypus
Babies Prove Sound Learners
Chimpanzee Hunting Tools
Birds
Vultures
Falcons
Eagles
Chemistry and Materials
Fog Buster
Graphene's superstrength
Heaviest named element is official
Computers
Batteries built by Viruses
Galaxies on the go
Look into My Eyes
Dinosaurs and Fossils
Downsized Dinosaurs
Tiny Pterodactyl
Dino-bite!
E Learning Jamaica
2014 GSAT Results for Jamaican Kids
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Results of GSAT are in schools this week
Earth
The Rise of Yellowstone
Groundwater and the Water Cycle
Drilling Deep for Fuel
Environment
Fungus Hunt
Lessons from a Lonely Tortoise
A Change in Leaf Color
Finding the Past
Stone Tablet May Solve Maya Mystery
Stonehenge Settlement
An Ancient Childhood
Fish
Pygmy Sharks
Sting Ray
Skates and Rays
Food and Nutrition
Packing Fat
Recipe for Health
In Search of the Perfect French Fry
GSAT English Rules
Adjectives and Adverbs
Capitalization Rules
Who vs. That vs. Which
GSAT Exam Preparation Jamaica
GSAT Practice Papers | GSAT Mathematics | Maths
Tarrant High overcoming the odds
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
GSAT Exams Jamaica Scholarships
Results of GSAT are in schools this week
42,000 students will sit for the GSAT Exam in two weeks
GSAT stars reap scholarship glory
GSAT Mathematics
Detecting True Art
Math of the World
Math and our number sense: PassGSAT.com
Human Body
Smiles Turn Away Colds
Kids now getting 'adult' disease
Foul Play?
Invertebrates
Hermit Crabs
Butterflies
Invertebrates
Mammals
Prairie Dogs
Woolly Mammoths
Tasmanian Devil
Parents
How children learn
Choosing a Preschool: What to Consider
The Surprising Meaning and Benefits of Nursery Rhymes
Physics
Road Bumps
Project Music
One ring around them all
Plants
Springing forward
Nature's Alphabet
Fastest Plant on Earth
Reptiles
Turtles
Lizards
Cobras
Space and Astronomy
Wrong-way planets do gymnastics
Slip-sliding away
Burst Busters
Technology and Engineering
Machine Copy
Drawing Energy out of Wastewater
Crime Lab
The Parts of Speech
Countable and Uncountable Nouns
Problems with Prepositions
What is a Preposition?
Transportation
Middle school science adventures
Robots on a Rocky Road
Morphing a Wing to Save Fuel
Weather
Watering the Air
In Antarctica watch the heat (and your step)
Science loses out when ice caps melt
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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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