Agriculture
Getting the dirt on carbon
Growing Healthier Tomato Plants
Watching out for vultures
Amphibians
Tree Frogs
Frogs and Toads
Newts
Animals
Mating Slows Down Prairie Dogs
Who's Knocking?
Walks on the Wild Side
Behavior
The (kids') eyes have it
Supersonic Splash
Talking with Hands
Birds
Woodpecker
Flightless Birds
Pigeons
Chemistry and Materials
Bandages that could bite back
Hair Detectives
Graphene's superstrength
Computers
Toxic Dirt + Avian Flu = Science Fair Success
Computers with Attitude
Supersonic Splash
Dinosaurs and Fossils
The man who rocked biology to its core
A Big, Weird Dino
Dino Bite Leaves a Tooth
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
Earth's Lowly Rumble
Hints of Life in Ancient Lava
A Great Quake Coming?
Environment
Watching for Wildfires in Yellowstone
Out in the Cold
Plastic Meals for Seals
Finding the Past
Big Woman of the Distant Past
Stone Age Sole Survivors
Decoding a Beverage Jar
Fish
Puffer Fish
Perches
Mahi-Mahi
Food and Nutrition
Yummy bugs
The Essence of Celery
Eat Out, Eat Smart
GSAT English Rules
Who vs. That vs. Which
Who vs. Whom
Order of Adjectives
GSAT Exam Preparation Jamaica
GSAT stars reap scholarship glory
GSAT Exam Preparation
Tarrant High overcoming the odds
GSAT Exams Jamaica Scholarships
Results of GSAT are in schools this week
GSAT Practice Papers | GSAT Mathematics | Maths
42,000 students will sit for the GSAT Exam in two weeks
GSAT Mathematics
Setting a Prime Number Record
Play for Science
Detecting True Art
Human Body
Kids now getting 'adult' disease
What the appendix is good for
Don't Eat That Sandwich!
Invertebrates
Snails
Sea Urchin
Mussels
Mammals
Flying Foxes
Quokkas
Marmots
Parents
Children and Media
How children learn
What Not to Say to Emerging Readers
Physics
Project Music
Powering Ball Lightning
Einstein's Skateboard
Plants
Hungry bug seeks hot meal
Surprise Visitor
When Fungi and Algae Marry
Reptiles
Tortoises
Sea Turtles
Lizards
Space and Astronomy
Asteroid Moons
A Planet's Slim-Fast Plan
A Galaxy Far, Far, Far Away
Technology and Engineering
Are Propellers Fin-ished?
Switchable Lenses Improve Vision
Weaving with Light
The Parts of Speech
Problems with Prepositions
Adjectives and Adverbs
Countable and Uncountable Nouns
Transportation
Where rivers run uphill
Reach for the Sky
Middle school science adventures
Weather
Warmest Year on Record
Science loses out when ice caps melt
Where rivers run uphill
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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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