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Latest Physical quantities Stories

2009-11-16 14:09:08

The system has an important part in the global climate due to its size, its high latitude location and the negative radiation balance of its large ice sheets. Antarctica has also been in focus for several decades due to increased ultraviolet (UV) levels caused by stratospheric ozone depletion, and the disintegration of its ice shelves. During the summer of 1997-1998, measurements of beam absorption and beam attenuation coefficients, and downwelling and upwelling irradiance were made in the...

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2009-11-12 06:50:00

Flight-model units for the LISA Pathfinder spacecraft are undergoing a series of tests to determine their magnetic characteristics. The purpose of the tests is to ensure that the stringent magnetic cleanliness requirements of the LISA Pathfinder mission will be met. The LISA Pathfinder mission objective is to verify that a test mass onboard the spacecraft can be kept 'free-floating', subject to unwanted accelerations of less than 3Ö10-14 m/s²....

2009-11-04 08:30:00

- http://DriveSmarterChallenge.org - (Editor's note for TV, websites, and blogs: Most tips are illustrated with downloadable B-roll footage at http://DriveSmarterChallenge.org/broadband, and winning contest videos could be used for a humorous story angle.) WASHINGTON, Nov. 4 /PRNewswire/ -- Whether driving to "Grandmother's house" or anywhere else for the upcoming Thanksgiving and other holidays, you can start saving money on gasoline even before hitting the road with a little advance...

2009-11-02 11:38:52

Experiments capture behavior of stressed magnetic fields Magnetized plasmas occupy a large fraction of our cosmic universe; they exist on our sun, in the earth's magnetosphere, and in astrophysical plasmas. They also exist in laboratory magnetic fusion grade plasmas, and in other smaller experiments as well. Energy stored in stressed magnetic fields can produce large-scale explosive events that spontaneously evolve and energize particles, owing to unsteady and impulsive local processes in...

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2009-10-27 14:51:41

Sandia researchers have developed a process that can mix tiny volumes of liquid, even in complicated spaces. Researchers currently use all types of processes to try and create mixing, with only "mixed" success. "In small devices," says Sandia materials scientist Jim Martin "people have tried all kinds of pillars and mixing cells to initiate mixing, but these approaches don't work well." Researchers need simpler and more reliable ways to mix in tiny places such as micrometer-sized channels,...

2009-10-09 10:09:09

University of Florida chemists have pioneered a method to tease out promising molecular structures for capturing energy, a step that could speed the development of more efficient, cheaper solar cells. "This gives us a new way of studying light-matter interactions," said Valeria Kleiman, a UF associate professor of chemistry. "It enables us to study not just how the molecule reacts, but actually to change how it reacts, so we can test different energy transfer pathways and find the most...

2009-10-06 13:46:00

AT&T fleet program provides case study ANN ARBOR, Mich., Oct. 6 /PRNewswire-USNewswire/ -- The "greening" of corporate vehicle fleets presents an opportunity to move a substantial number of highly efficient, clean fuel vehicles onto the road in a relatively short timeframe -- with results that are both environmentally and economically positive. A newly released report by the Sustainable Transportation and Communities group at the Center for Automotive Research (CAR), an Ann...

2009-09-22 09:21:22

Nuclear magnetic moment is one of the most important physical observables. The precise measurement of nuclear magnetic moment and its understanding in microscopic way are quite a challenge in nuclear physics. The research team at Peking University, who has dedicated to the study of nuclear structure and astrophysics for the last decades, has applied the configuration-fixed deformation constrained RMF approach with time-odd component to investigate the ground-state properties of 33Mg and...

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2009-09-03 23:30:00

Researchers from the Helmholtz-Zentrum Berlin fr Materialien und Energie have, in cooperation with colleagues from Dresden, St. Andrews, La Plata and Oxford, for the first time observed magnetic monopoles and how they emerge in a real material. They publish this result in the journal Science within the Science Express web site on Sept. 3. Magnetic monopoles are hypothetical particles proposed by physicists that carry a single magnetic pole, either a magnetic North pole or South pole. In the...

2009-08-27 16:54:12

Researchers from Wageningen University used the warm days in August to map out the urban climate in two Dutch cities. The research team drove two cargo bicycles with measurement equipment during various times of a 24 hours' day through Rotterdam and Arnhem. The results may indicate to which extent heat stress may become a problem for the inhabitants.Future projections of climate change show  that frequency of heat waves will increase substantially in the next decades. Particularly in...


Word of the Day
attercop
  • A spider.
  • Figuratively, a peevish, testy, ill-natured person.
'Attercop' comes from the Old English 'atorcoppe,' where 'atter' means 'poison, venom' and‎ 'cop' means 'spider.' 'Coppa' is a derivative of 'cop,' top, summit, round head, or 'copp,' cup, vessel, which refers to 'the supposed venomous properties of spiders,' says the OED. 'Copp' is still found in the word 'cobweb.'
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