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Latest Pendulum Stories

Quantum Inverted Pendulum
2013-08-28 08:18:43

Georgia Institute of Technology A simple pendulum has two equilibrium points: hanging in the "down" position and perfectly inverted in the "up" position. While the "down" position is a stable equilibrium, the inverted position is definitely not stable. Any infinitesimal deviation from perfectly inverted is enough to cause the pendulum to eventually swing down. It has been known for more than 100 years, though, that an inverted pendulum can be stabilized by vibrating the pivot point....

New Stability Record Set By NIST Ytterbium Atomic Clocks
2013-08-22 14:45:09

National Institute of Standards and Technology (NIST) A pair of experimental atomic clocks based on ytterbium atoms at the National Institute of Standards and Technology (NIST) has set a new record for stability. The clocks act like 21st-century pendulums or metronomes that could swing back and forth with perfect timing for a period comparable to the age of the universe. NIST physicists report in the Aug. 22 issue of Science Express that the ytterbium clocks' tick is more stable than...

2013-01-28 23:02:57

Contemporary Heaven now stocks two new wall clocks from the Spanish designer brand Balvi, who provide funky modern wall clocks and home accessories. The two new additions to the Balvi Wall Clock range are the Grand Numbers Wall Clock and the Twenty Four White Station Wall Clock. (PRWEB) January 28, 2013 Modern, simple and beautiful clocks form the Balvi wall clock range, with varied styles and colours available. Balvi wall clocks like the Umbrella Clock, the Mega Clock, the Big Pendulum...

Berkeley Physicist Uses Atomic Matter To Tell Time
2013-01-11 15:06:34

Brett Smith for redOrbit.com - Your Universe Online In a groundbreaking new study, physicists from the University of California, Berkeley have used atomic matter to measure time. According to a new report in the journal Science, Holger Müller and his Berkeley colleagues describe how to tell time using a cesium atom and the theory that matter can be both a particle and a wave. "When you make a grandfather clock, there is a pendulum and a clockwork that counts the...

Better Accuracy For Optical Strontium Clock
2013-01-03 11:30:03

Alpha Galileo Foundation PTB measures the influence of the ambient temperature on strontium atoms for the first time — measurement uncertainty reduced by one order of magnitude An optical clock with neutral strontium atoms is considered one of the top candidates for the definition of a "new" second. The probabilities have increased considerably, since its frequency will now be determined more accurately (probably by an order of magnitude). Scientists of the Physikalisch-Technische...

Image 1 - New Blueprint To Keep Nuclear Clock Accurate Over Billions Of Years
2012-03-20 04:00:26

A clock accurate to within a tenth of a second over 14 billion years — the age of the universe — is the goal of research being reported this week by scientists from three different institutions. To be published in the journal Physical Review Letters, the research provides the blueprint for a nuclear clock that would get its extreme accuracy from the nucleus of a single thorium ion. Such a clock could be useful for certain forms of secure communication — and perhaps of...

Nuclear Clock Keeps Time With The Universe
2012-03-10 05:58:16

As time passes, new technology evolves in order to keep time. Soon the trusty atomic clock may be replaced by a nuclear clock, which keeps time to 1/20th of a second in 14 billion years. In early time, the sun or grains of sand in an hourglass kept time. Over the years technology allowed for clocks you could wind, watches with quartz oscillators, and more recently the atomic clock. The atomic clock uses an electronic transition frequency to keep time. Considered quite accurate, atomic...

2011-10-11 10:07:42

A coupled line of swinging pendulums apparently has nothing in common with an elastic film that buckles and folds under compression while floating on a liquid, but scientists at the University of Chicago and Tel Aviv University have discovered a deep connection between the two phenomena. Energy carried in ordinary waves, like those seen on the ocean near a beach, quickly disperses. But the energy in the coupled pendulums and in compressed elastic film concentrates into different kinds of...

tech-082611-005a
2011-08-26 12:27:20

  Researchers have found that an atomic clock at the U.K.'s National Physical Laboratory (NPL) has the best long-term accuracy of any other clock in the world. Studies of the clock's accuracy show it is nearly twice as accurate as previously thought. The clock would lose or gain less than a second in about 138 million years. The NPL's CsF2 clock is a "caesium foundation" atomic clock, in which the "ticking" is provided by the measurement of the energy required to change a...


Latest Pendulum Reference Libraries

45_c0dfd8d280cae069a688d64f0916e3d7
2010-09-16 15:30:25

An astronomical clock is a clock with special mechanisms and dials to display astronomical information. This information can include everything from the relative position of the sun and the moon to major planets to zodiacal constellations. The term Astronomical clock is loosely used to refer to any clock that shows astronomical information. The clock could include the location of the sun and the moon, age and phase of the moon as well as other astronomical data. However, it should not be...

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Word of the Day
call-note
  • The call or cry of a bird or other animal to its mate or its young.
'Call-note' is newer than 'bird-call,' which originally referred to 'an instrument for imitating the note of birds' but now also refers to 'the song or cry of a bird.'
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