Agriculture
Where Have All the Bees Gone?
Microbes at the Gas Pump
Getting the dirt on carbon
Amphibians
Newts
Frogs and Toads
Bullfrogs
Animals
A Meal Plan for Birds
Mating Slows Down Prairie Dogs
Cacophony Acoustics
Behavior
Bringing fish back up to size
Primate Memory Showdown
Sugar-pill medicine
Birds
Cardinals
Cranes
Doves
Chemistry and Materials
The solar system's biggest junkyard
The hottest soup in New York
Graphene's superstrength
Computers
It's a Small E-mail World After All
Fingerprint Evidence
Middle school science adventures
Dinosaurs and Fossils
Dinosaur Eggs-citement
Have shell, will travel
Dino-Dining Dinosaurs
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Results of GSAT are in schools this week
2014 GSAT Results for Jamaican Kids
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Earth
Groundwater and the Water Cycle
Greener Diet
On the Trail of America's Next Top Scientists
Environment
Catching Some Rays
Plastic Meals for Seals
Snow Traps
Finding the Past
Early Maya Writing
A Volcano's Deadly Ash
Words of the Distant Past
Fish
Swordfish
A Jellyfish's Blurry View
Seahorses
Food and Nutrition
Packing Fat
Symbols from the Stone Age
The Essence of Celery
GSAT English Rules
Who vs. Whom
Finding Subjects and Verbs
Subject and Verb Agreement
GSAT Exam Preparation Jamaica
GSAT stars reap scholarship glory
Results of GSAT are in schools this week
Mastering The GSAT Exam
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GSAT stars reap scholarship glory
GSAT Scholarship
2014 GSAT Results for Jamaican Kids
GSAT Mathematics
Detecting True Art
Secrets of an Ancient Computer
Monkeys Count
Human Body
Dreaming makes perfect
Cell Phones and Possible Health Hazards
Fighting Off Micro-Invader Epidemics
Invertebrates
Crabs
Squid
Beetles
Mammals
Dogs
Little Brown Bats
Chinchillas
Parents
The Surprising Meaning and Benefits of Nursery Rhymes
Children and Media
What Not to Say to Emerging Readers
Physics
Einstein's Skateboard
Road Bumps
Hold on to your stars, ladies and gentlemen
Plants
Surprise Visitor
Nature's Alphabet
Bright Blooms That Glow
Reptiles
Sea Turtles
Lizards
Reptiles
Space and Astronomy
Planning for Mars
A Great Ball of Fire
An Icy Blob of Fluff
Technology and Engineering
Young Scientists Take Flight
Reach for the Sky
Sugar Power for Cell Phones
The Parts of Speech
What is a Preposition?
What is a Noun
Adjectives and Adverbs
Transportation
Tinkering With the Basic Bike
Troubles with Hubble
Revving Up Green Machines
Weather
Catching Some Rays
Antarctica warms, which threatens penguins
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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