Science – Page 213 – Shamskm: A site to exchange knowledge and solutions

Water Geysers on Saturn’s Moon

By Guest PostAugust 1, 2013Sciencecassini spacecraft, christophe sotin, cornell university, data, enceladus, enceladus plume, galileo, gravity, hydrocarbon composition, icy surface, instrument, ithaca, jet propulsion laboratory, linda spilker, matt hedman, moon, moon of saturn, NASA, organic material, robert brown, saturn, saturn gravity, saturnian moon, seismological signs, tiger stripes, titan, university of arizona, vims, water geysers

A new study published in Nature this week describes the forces that control the jets of water and organic material that erupt from the icy surface of Enceladus, a moon of Saturn. UA scientists contributed data to the study.

The intensity of the jets of water ice and organic molecules that shoot out from Saturn’s moon Enceladus depends on the moon’s proximity to the planet, according to data obtained by NASA’s Cassini spacecraft. The finding, detailed in the journal Nature this week, is the first clear observation that shows the Enceladus plume varies in a predictable manner. (more…)

Origins and uses of wrinkles, creases, folds

By Guest PostJuly 31, 2013Scienceanatomy, biology, brown university, creases, engineers, folds, hollow channels, huajian gao, initial strain, kyung suk kim, mazen diab, micro organs, origins, properties of surface, ruga states, ruike zhao, skin creases, teng zhang, uses of wrinkles, wrinkle phase

New research into the origins of — and structural differences between — wrinkles, creases, and folds could have applications in many fields, from flexible electronic devices to dermatology to flexible sheets that become sticky when stretched. Findings from a Brown University research group appear in Proceedings of the Royal Society A.

PROVIDENCE, R.I. [Brown University] — Engineers from Brown University have mapped out the amounts of compression required to cause wrinkles, creases, and folds to form in rubbery materials. The findings could help engineers control the formation of these structures, which can be useful in designing nanostructured materials for flexible electronic devices or surfaces that require variable adhesion. (more…)

Some volcanoes ‘scream’ at ever-higher pitches until they blow their tops

By Guest PostJuly 31, 2013Scienceeruptive cycles, harmonic tremor, small earthquakes, tremor frequency, volcanic eruption

It is not unusual for swarms of small earthquakes to precede a volcanic eruption. They can reach a point of such rapid succession that they create a signal called harmonic tremor that resembles sound made by various types of musical instruments, though at frequencies much lower than humans can hear. (more…)

Hubble spots azure blue planet

By Guest PostJuly 30, 2013Sciencealien world, colour of planet, exoplanets to earth, exotic planet, hot jupiters, planet is blue

Astronomers from the University of Exeter using the NASA/ESA Hubble Space Telescope along with an international team of researchers have, for the first time, determined the true colour of a planet orbiting another star. (more…)

How Mars’ atmosphere got so thin: New insights from Curiosity

By Guest PostJuly 29, 2013Scienceadditional neutron, carbon 12, carbon 13, carbon isotope, curiosity rover, heavier stable isotope, insights from curiosity, isotopes, lighter isotopes, mahli, mars atmosphere, martian air, NASA, sam, samples, solar system, sushil atreya, thin, university of michigan

ANN ARBOR — New findings from NASA’s Curiosity rover provide clues to how Mars lost its original atmosphere, which scientists believe was much thicker than the one left today.

“The beauty of these measurements lies in the fact that these are the first really high-precision measurements of the composition of Mars’ atmosphere,” said Sushil Atreya, professor of atmospheric, oceanic and space sciences at the University of Michigan. (more…)

NASA’s WISE Finds Mysterious Centaurs May Be Comets

By Guest PostJuly 28, 2013Sciencecelestial bodies, cometary origins, comets, mysterious centaurs, outgassing comets

PASADENA, Calf. — The true identity of centaurs, the small celestial bodies orbiting the sun between Jupiter and Neptune, is one of the enduring mysteries of astrophysics. Are they asteroids or comets? A new study of observations from NASA’s Wide-field Infrared Survey Explorer (WISE) finds most centaurs are comets. (more…)

From art book to iPad app: Josef Albers’ classic work undergoes a ‘magical’ transformation

By Guest PostJuly 28, 2013Sciencealbers methodology, color app, color philosophy, interaction of color, josef albers, teaching methods

“Interaction of Color” — Josef Albers’ iconic book that taught legions of students and professionals alike how to think creatively about color — has been given a modern makeover as an iPad app, just in time for the 50th anniversary of its publication by Yale University Press. (more…)

Newly Discovered Marine Viruses Offer Glimpse Into Untapped Biodiversity

By Guest PostJuly 27, 2013Sciencebacteriophages, bacteroidetes phages, baltic sea, biodiversity, carbon dioxide, cellulophaga, cosmic analogy, environmental viruses, firmicutes, global cycles, global food webs, karin holmfeldt, marine viruses, matthew sullivan, microorganisms, oak ridge, phyla of bacteria, phylum, prey on bacteria, studying bacteria, universe, university of arizona

Studying bacteria from the Baltic Sea, UA researchers have discovered an entire array of previously unknown viruses that barely resemble any of the known bacteria-infecting viruses.

Researchers of the University of Arizona’s Tucson Marine Phage Lab have discovered a dozen new types of unknown viruses that infect different strains of marine bacteria. (more…)

Category Archives: Science