News tagged with ptb
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Search results for ptb
Atomic clock comparison via data highways
(Phys.org) -- Optical atomic clocks measure time with unprecedented accuracy. However, it is the ability to compare clocks with one another that makes them applicable for high-precision tests in fundamental ...
Apr 27, 2012 |
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3
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Mini-sensor measures magnetic activity in human brain
A miniature atom-based magnetic sensor developed by the National Institute of Standards and Technology (NIST) has passed an important research milestone by successfully measuring human brain activity. Experiments ...
Apr 19, 2012 |
4.9 / 5 (9) |
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The tick-tock of the optical clock
(PhysOrg.com) -- UK's National Physical Laboratory time scientists have made an accurate measurement of the highly forbidden octupole transition frequency in an ytterbium ion, which could be used as the basis ...
Mar 29, 2012 |
3.8 / 5 (10) |
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New 'pendulum' for the ytterbium clock
The faster a clock ticks, the more precise it can be. Due to the fact that lightwaves vibrate faster than microwaves, optical clocks can be more precise than the caesium atomic clocks which presently determine ...
Mar 09, 2012 |
4.5 / 5 (11) |
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Timeline of a mass extinction: New evidence points to rapid collapse of Earth’s species 252 million years ago
Since the first organisms appeared on Earth approximately 3.8 billion years ago, life on the planet has had some close calls. In the last 500 million years, Earth has undergone five mass extinctions, including ...
Space & Earth / Earth Sciences
Nov 18, 2011 |
4.6 / 5 (18) |
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Magnetic nanoswitch for thermoelectric voltages
The heat which occurs in tiny computer processors might soon be no longer useless or even a problem. On the contrary: It could be used to switch these processors more easily or to store data more efficiently! ...
Oct 24, 2011 |
5 / 5 (2) |
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Single magnesium ion brought to standstill by means of novel, simple laser cooling
Quantum logic is quite a new and absolutely fascinating field of physics and might – ultimately – lead to the fabrication of a quantum computer. And it could also aid the search for the "theory of ...
Sep 29, 2011 |
4.3 / 5 (3) |
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A big step towards the redefinition of the kelvin
Metrologists are measurement artists who are very precise – in the case of the Boltzmann constant up to the sixth decimal place. Whoever is able to determine it very exactly will cause a small revolution in the field ...
Sep 20, 2011 |
5 / 5 (4) |
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Extremely fast MRAM data storage within reach
Magnetic Random Access Memories (MRAM) are the most important new modules on the market of computer storage devices. Like the well known USB-sticks, they store information into static memory, but MRAM offer ...
Mar 08, 2011 |
4.5 / 5 (15) |
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Accurate measurement of radioactive thoron possible at last
Annette Rottger and her scientific team managed to do something that was previously thought to be impossible: they developed a primary standard for the measurement of short-lived radioactive thoron.
Mar 07, 2011 |
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0
List of search results for ptb
