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Latest Atomic clock Stories

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2009-05-21 07:37:27

Researchers have figured out how to nullify collision effects and make the clock still more precise To accurately measure tiny intervals of time, you need a clock that ticks very fast and very precisely. For the ultimate in accuracy, scientists reach for atoms, or more precisely, an exactly known frequency of light emitted by a chosen atom. The 'ticks' are the crests of a light wave, which rises and falls as many as a thousand trillion times per second. In an effort to improve the already...

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2009-04-17 08:18:54

A clock that is so precise that it loses only a second every 300 million years "“ this is the result of new research in ultra cold atoms. The international collaboration is comprised of researchers from the University of Colorado, USA and the Niels Bohr Institute at the University of Copenhagen and the results have just been published in the prestigious scientific journal, Science. An atomic clock consists of gas atoms captured in a magnetic field where they are held stationary with...

2009-04-13 09:53:47

Institute of Quantum Electronics, School of Electronics Engineering and Computer Science, Peking University, has proposed the concept, principles and techniques of active optical clock. The study is reported in Issue 54 (February, 2009) of Chinese Science Bulletin because of its significant research value. Up to date, all realize that optical clocks are based on the laser absorption spectroscopy. Thus the available laser with narrowest linewidth limits the linewidth of state-of-the-art...

2009-03-19 08:55:11

Caesium fountains are more accurate than "normal" atomic caesium clocks, because in fountains the caesium atoms are cooled down with the aid of laser beams and come ever slower - from a rapid velocity at room temperature to a slow "creep pace" of a few centimetres per second at a temperature close to the absolute zero point. Thus, the atoms remain together for a longer time so that the physicists have considerably more time to measure the decisive property of the caesium atoms which is...

2008-12-24 16:47:08

This year will be longer than usual -- by one second, the U.S. Institute of Standards and Technology said Wednesday. The earth is sufficiently out of sync that a leap second has been scheduled for 7 p.m. U.S. Eastern Standard Time on Dec. 31, said the institute, noting those interested in watching it happen should go to www.time.gov before midnight, London time, and click on their time zone. A total of 24 leap seconds have been added since 1972, the last being in December 2005, because the...

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2008-12-09 09:50:00

The world's timekeepers are making the year 2008 even longer by adding a leap second to the last day of the year. The Earth is slowing down, which requires timekeepers to add an extra second to their atomic clocks to keep in sync with Earth's slightly slowing rotation.  So on December 31st at 6:59:59 p.m., an extra second will be added before 7:00 p.m. Eastern Standard Time. The extra second, plus the extra day on Feb. 29, makes the year 2008 the longest year since 1992. The decision to...

2008-09-10 00:00:20

SpectraTime awarded 4 M contract to supply Rubidium Spaceclocks to the Indian Regional Navigational Satellite System SpectraTime, a company of the Orolia group (NYSE Alternext Paris - FR0010501015 - ALORO), today announced the award of a contract valued at approximately 4 million to supply Rubidium Space Clocks to the Indian Regional Navigational Satellite System (IRNSS). With this new contract, SpectraTime confirms its position as the world- leading supplier of space atomic clocks and is...

2008-07-13 00:00:18

By Marshall Brain In the Brain household, there are four small children, and lately we have been doing something called geocaching as a family. Here's how it works. At thousands of points around the United States (and the world), people have hidden a wide variety of "caches." A cache can be as small as a pill bottle or as big as a 5-gallon bucket. A cache can contain anything from a paper log sheet where you sign your name, to a collection of paperback books to read. To find these caches,...

2008-07-08 18:00:32

In the Brain household there are four small children, and lately we have been doing something called geocaching as a family. Here's how it works. At thousands of points around the United States (and the world), people have hidden a wide variety of "caches." A cache can be as small as a pill bottle or as big as a five gallon bucket. A cache can contain anything from a paper log sheet where you sign your name, to a collection of paperback books to read. To find these caches you go to a web...

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2008-04-25 01:15:00

For centuries, timepieces have been used to aid navigation. However, the latest hydrogen maser atomic clock is a world away from any used ever before. The new "Ëœspace clock' will be launched onboard the Giove-B satellite when it launches from the Baikonaur Cosmodrome in Kazakhstan."Such a clock has never been flown," Pierre Waller, an engineer at the European Space Agency (Esa), told BBC News.The clock will serve as the beating heart of Giove-B, the second test spacecraft...


Word of the Day
cock-a-hoop
  • Exultant; jubilant; triumphant; on the high horse.
  • Tipsy; slightly intoxicated.
This word may come from the phrase 'to set cock on hoop,' or 'to drink festively.' Its origin otherwise is unclear. A theory, according to the Word Detective, is that it's a 'transliteration of the French phrase 'coq a huppe,' meaning a rooster displaying its crest ('huppe') in a pose of proud defiance.' Therefore, 'cock-a-hoop' would 'liken a drunken man to a boastful and aggressive rooster.'
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