Tuesday, 6 May 2014

Urban physics: serendipitous observation leads to research linking physics and urban planning

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Franz-Josef Ulm and a colleague were taking a break from a tough problem one afternoon when they spotted an aerial photograph of a city and had an epiphany. Instantly, they made a connection between the patterns of houses and streets and the underlying molecular structure of cement. That serendipitous observation has since led to research that is tying together the seemingly disparate disciplines of physics and urban planning. “Ultimately, I believe there’s potential for this to become a new field of study,” says Ulm, the George Macomber Professor in the Department of Civil and Environmental Engineering, and co-director with Senior Research Scientist Roland Pellenq of the International Joint Unit (UMI) between MIT and CNRS, France’s National Center for Scientific Research. “It also could lead to new tools for architects and city planners.” Urban physics, as Ulm calls the new work, views cities as analogous to complex materials. Over the last 50 years, physicists have developed ever-better statistical tools to learn more about materials at the molecular scale. And Ulm himself is a world leader in using them to understand the structure of cement, with the ultimate goal of creating better versions of the material. Ulm and colleagues are now modifying

The post Urban physics: serendipitous observation leads to research linking physics and urban planning has been published on Technology Org.

 
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I see no god up here poster

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The secret to living upside down, according to sloths

Science Focus

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Sloths spend most of their time eating and hanging around in trees. Nice as that kind of lifestyle sounds, it's easy to see how it might get a little uncomfortable after a while.

With a full stomach, a sloth's abdominal organs can account for a quarter to more than a third of its total body weight. They can store about an equal amount of weight in feces and urine before relieving themselves, which they only do about once a week.

Now remember that sloths hang from the bottom of tree branches, gripping them with their arms and legs while either partially or completely upside-down. Those inverted...

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 » see original post http://theweek.com/article/index/260366/the-secret-to-living-upside-down-according-to-sloths
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Ex-astronauts plan to launch an asteroid-tracking satellite

Science Focus

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B612 Foundation representative Bill Anders stands in front of the famed "Earthrise" photo he took during his mission on Apollo 8 while announcing his new group's efforts to launch an asteroid-detecting satellite. He's joined by fellow B612 Foundation leaders and ex-astronauts Thomas Jones (left) and Ed Lu (right).
Museum of Flight

On Tuesday, with Earth Day as a backdrop, the B612 Foundation started its presentation about asteroid detection with enough material to fill out an apocalyptic sci-fi film. An introductory video mapped out 26 nuclear-bomb-level impacts recorded on Earth in the last 13 years, a few of which were measured as larger than the one that leveled Hiroshima. After that, a supplementary video showed thousands of dots whirling around the Solar System like fireflies, each dot representing an asteroid that has been tracked by NASA. "There are at least 100 times as many [asteroids] out there," B612 reps said.

Next to the projector's screen sat a cardboard kiosk with a grotesque image: an asteroid about to crash into a giant football stadium. Earth Day? More like Kiss-Earth-Goodbye Day!

“The current strategy to deal with asteroid impacts is blind luck,” former NASA astronaut Dr. Ed Lu said, hinting at a lack of effort from NASA and other space agencies. “But we can change that.”

Read 11 remaining paragraphs | Comments

 
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 » see original post http://feeds.arstechnica.com/~r/arstechnica/science/~3/K1WgeaZMPyc/
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VIDEO: Are electronic cigarettes safe?

Science Focus

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The British Medical Association has recommended electronic cigarettes should be banned. 
#science 
 » see original post http://www.bbc.co.uk/news/health-27184630#sa-ns_mchannel=rss&ns_source=PublicRSS20-sa
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Flexible all-carbon electronics integrated onto plants, insects, and more

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(Phys.org) —Carbon-based electronics are being widely explored due to their attractive electrical and mechanical properties, but synthesizing them in large quantities at low cost is still a challenge.



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The Active Cigar Galaxy - Messier 82 Square Stickers

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Galaxies, Stars and Nebulae series

Composite of images of the active galaxy Messier 82 from the three Great Observatories: Hubble Space Telescope, Chandra X-Ray Observatory, and Spitzer Space Telescope. X-ray data recorded by Chandra appears here in blue, infrared light recorded by Spitzer appears in red. Hubble's observation of hydrogen emission appears in orange. Hubble's bluest observation appears in yellow-green.

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Image code: agmet

Image credit: Hubble Space Telescope, Chandra X-Ray Observatory, Spitzer Space Telescope

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Orange Sun Sparking

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Zazzle Space Gifts for young and old

Little Ghost Nebula (NGC 6369) Room Graphic

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"NASA's Hubble Space Telescope has recently obtained images of the planetary nebula NGC 6369. This object is known to amateur astronomers as the "Little Ghost Nebula," because it appears as a small, ghostly cloud surrounding the faint, dying central star. NGC 6369 lies in the direction of the constellation Ophiuchus, at a distance estimated to be between about 2,000 and 5,000 light-years from Earth."

(qtd. from Hubblesite.org NewsCenter release STScI-2002-25)

Credit: NASA and The Hubble Heritage Team (STScI/AURA)

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Astronomers harness the galaxy's biggest telescope to make most precise measurement of spinning star

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(Phys.org) —An international team of astronomers has made a measurement of a distant neutron star that is one million times more precise than the previous world's best.



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Eye Galaxy Wall Decals

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Psalm 19:1 The heavens declare the glory of God; the skies proclaim the work of his hands.

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Pandora's Cluster Detail iPad Air Cover

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A colorful space image galaxy cluster Abell 2744, otherwise known as Pandora's Cluster. Source of image is NASA/Hubble programs.

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Planck takes magnetic fingerprint of our Galaxy

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Our Galaxy’s magnetic field is revealed in a new image from ESA’s Planck satellite. This image was compiled from the first all-sky observations of ‘polarised’ light emitted by interstellar dust in the Milky Way.




via ESA Space Science

http://www.esa.int/Our_Activities/Space_Science/Planck/Planck_takes_magnetic_fingerprint_of_our_Galaxy

Creation of the Universe Print

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New mathematical framework to characterize shape of graphene

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Scientists studying graphene’s properties are using a new mathematical framework to make extremely accurate characterizations of the two-dimensional material’s shape. Graphene, discovered in 2004, is a one-atom-thick sheet of graphite.

via Science Daily

The Active Cigar Galaxy - Messier 82 Sticker

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Galaxies, Stars and Nebulae series

Composite of images of the active galaxy Messier 82 from the three Great Observatories: Hubble Space Telescope, Chandra X-Ray Observatory, and Spitzer Space Telescope. X-ray data recorded by Chandra appears here in blue, infrared light recorded by Spitzer appears in red. Hubble's observation of hydrogen emission appears in orange. Hubble's bluest observation appears in yellow-green.

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Image credit: Hubble Space Telescope, Chandra X-Ray Observatory, Spitzer Space Telescope

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Carina's 'Mystic Mountain' Room Graphic

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"This brand new Hubble photo is of a small portion of one of the largest seen star-birth regions in the galaxy, the Carina Nebula. Towers of cool hydrogen laced with dust rise from the wall of the nebula. The scene is reminiscent of Hubble's classic "Pillars of Creation" photo from 1995, but is even more striking in appearance. The image captures the top of a three-light-year-tall pillar of gas and dust that is being eaten away by the brilliant light from nearby bright stars. The pillar is also being pushed apart from within, as infant stars buried inside it fire off jets of gas that can be seen streaming from towering peaks like arrows sailing through the air."

(qtd. from HubbleSite.org NewsCenter release STScI-2010-13)

Credit: NASA, ESA, and M. Livio and the Hubble 20th Anniversary Team (STScI)

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