News tagged with clock
Molecular path from internal clock to cells controlling rest and activity revealed in new study
(PhysOrg.com) -- The molecular pathway that carries time-of-day signals from the body's internal clock to ultimately guide daily behavior is like a black box, says Amita Sehgal, PhD, the John Herr Musser Professor ...
Feb 07, 2012 |
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Namibia sponge fossils are world's first animals: study
Scientists digging in a Namibian national park have uncovered sponge-like fossils they say are the first animals, a discovery that would push the emergence of animal life back millions of years.
Other Sciences / Archaeology & Fossils
Feb 06, 2012 |
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Precision time: A matter of atoms, clocks, and statistics
Time is of the essence, especially in communications, navigation, and electric power distribution, which all demand nanosecond precision or better. Keeping these beating hearts of technology in near-perfect global synchronization ...
Feb 01, 2012 |
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Physicists create first 'frequency comb' to probe ultraviolet wavelengths
Physicists at JILA have created the first "frequency comb" in the extreme ultraviolet band of the spectrum, high-energy light less than 100 nanometers (nm) in wavelength. Laser-generated frequency combs are the most accurate ...
Feb 01, 2012 |
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Genetic study links body clock receptor to diabetes
A study published in Nature Genetics today has found new evidence for a link between the body clock hormone melatonin and type 2 diabetes. The study found that people who carry rare genetic mutations in the receptor for me ...
Jan 29, 2012 |
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World timekeepers split on scrapping leap second
Timekeepers meeting in Geneva failed to agree Thursday on a proposal to abolish a 40-year-old practice of adding the occasional second to world time.
Jan 19, 2012 |
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'Leap second' under the gun at Geneva time talks
Timekeepers gathered in Geneva on Thursday to thrash out a contested proposal to abolish a 40-year-old practice of adding the occasional second to world time.
Space & Earth / Space Exploration
Jan 19, 2012 |
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Countries consider time out on the 'leap second'
It's high noon for the humble leap second. After ten years of talks, governments are headed for a showdown vote this week on an issue that pits technological precision against nature's whims.
Space & Earth / Earth Sciences
Jan 17, 2012 |
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The world's slowest clock
(PhysOrg.com) -- National Physical Laboratory is well known for having some of the fastest and most accurate clocks in the world, but now new research with the Scottish Universities Environmental Research ...
Jan 17, 2012 |
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'Doomsday' ticks closer on nuclear, climate fears
Global uncertainty on how to deal with the threats of nuclear weapons and climate change have forced the "Doomsday clock" one minute closer to midnight, leading international scientists said Tuesday.
Jan 10, 2012 |
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Disruption of biological clocks causes neurodegeneration, early death
New research at Oregon State University provides evidence for the first time that disruption of circadian rhythms – the biological "clocks" found in many animals – can clearly cause accelerated neurodegeneration, ...
Medicine & Health / Neuroscience
Jan 10, 2012 |
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The nuclear, biological and climate threat - 2011 reviewed
In this special issue of the Bulletin of the Atomic Scientists, published by SAGE, experts reflect on 2011 and highlight what to look out for in 2012 in the areas of nuclear energy, nuclear weapons, biosecurity, and climat ...
Technology / Energy & Green Tech
Jan 06, 2012 |
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More accurate than Santa Claus: First Galileo satellite orbit determination with high precision
Every year for Christmas, the North American Air Defence Command NORAD posts an animation on their website, in which the exact flight path of Santa Claus' sled led by reindeer Rudolf is precisely located (http://www.noradsanta.org/en/). The path of navigation satellites, however, ...
Space & Earth / Space Exploration
Dec 23, 2011 |
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Treating sleep problems may be important in schizophrenia
(Medical Xpress) -- A study of schizophrenia patients has found profound disruptions in their sleep patterns, with half also having irregular body clocks that are out of synch with the pattern of night and ...
Medicine & Health / Psychology & Psychiatry
Dec 22, 2011 |
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New discovery may lead to safer treatments for asthma, allergies and arthritis
Scientists have discovered a missing link between the body's biological clock and sugar metabolism system, a finding that may help avoid the serious side effects of drugs used for treating asthma, allergies and arthritis.
Dec 19, 2011 |
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Clock
A clock is an instrument used to indicate, keep, and co-ordinate time. The word clock is derived ultimately (via Dutch, Northern French, and Medieval Latin) from the Celtic words clagan and clocca meaning "bell". A silent instrument missing such a mechanism has traditionally been known as a timepiece. In general usage today a "clock" refers to any device for measuring and displaying the time. Watches and other timepieces that can be carried on one's person are often distinguished from clocks.
The clock is one of the oldest human inventions, meeting the need to consistently measure intervals of time shorter than the natural units: the day; the lunar month; and the year. Devices operating on several different physical processes have been used over the millennia, culminating in the clocks of today.
For more information about Clock, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
