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Russia Meteor Not Linked to Asteroid Flyby

By Guest PostFebruary 16, 2013Sciencealaska, asteroid flyby, atmosphere, canada, chelyabinsk, earth, infrasound data, jet propulsion laboratory, kilotons, NASA, network of sensors, object, pasadena, paul chodas, peter brown, russia, russia meteor, size, trajectory, university, western ontario

New information provided by a worldwide network of sensors has allowed scientists to refine their estimates for the size of the object that entered that atmosphere and disintegrated in the skies over Chelyabinsk, Russia, at 7:20:26 p.m. PST, or 10:20:26 p.m. EST on Feb. 14 (3:20:26 UTC on Feb. 15).

The estimated size of the object, prior to entering Earth’s atmosphere, has been revised upward from 49 feet (15 meters) to 55 feet (17 meters), and its estimated mass has increased from 7,000 to 10,000 tons. Also, the estimate for energy released during the event has increased by 30 kilotons to nearly 500 kilotons of energy released. These new estimates were generated using new data that had been collected by five additional infrasound stations located around the world – the first recording of the event being in Alaska, over 6,500 kilometers away from Chelyabinsk. The infrasound data indicates that the event, from atmospheric entry to the meteor’s airborne disintegration took 32.5 seconds. The calculations using the infrasound data were performed by Peter Brown at the University of Western Ontario, Canada. (more…)

Testing Einstein’s E=mc2 in Outer Space

By Guest PostJanuary 5, 2013Sciencealbert einstein, andrei lebed, atomic bomb, conceptual model, cornell university library, curvature, electron, energy, energy level, everything, explosion, galileo galilei, general relativity, gps navigation, gravitational field, gravitational mass, gravity, hydrogen atom, iconic equation, mass, motion, moving object, nucleus, object, paradigm in physics, principles in physics, proton, quantum mechanics, quantum objects, relativistic, Space, special relativity, speed of light, stockholm, theory, theory of gravitation, ua physicist, unifying theory, university of arizona

UA physicist Andrei Lebed has stirred the physics community with an intriguing idea yet to be tested experimentally: The world’s most iconic equation, Albert Einstein’s E=mc2, may be correct or not depending on where you are in space.

With the first explosions of atomic bombs, the world became witness to one of the most important and consequential principles in physics: Energy and mass, fundamentally speaking, are the same thing and can, in fact, be converted into each other.

This was first demonstrated by Albert Einstein’s Theory of Special Relativity and famously expressed in his iconic equation, E=mc2, where E stands for energy, m for mass and c for the speed of light (squared). (more…)

Mammalian Brain Knows Where It’s at

By Guest PostDecember 8, 2012Sciencebehavior, brain, brain injury, brown university, conventional wisdom, depression, disease, egocentric movement, electrical activity, fish sculpture, frequency, hippocampus, humans, journal, location, memory, neuron, neuropsychiatric diseases, neuroscientist, object, omar ahmed, parahippocampal cortex, pattern, phc, por, postrhinal cortex, primate neuroanatomy, rebecca burwell, region, rhythm, schizophrenia, sharon furtak, Space, spiking, theta, treat

A new study in the journal Neuron suggests that the brain uses a different region than neuroscientists had thought to associate objects and locations in the space around an individual. Knowing where this fundamental process occurs could help treat disease and brain injury as well as inform basic understanding of how the brain supports memory and guides behavior.

PROVIDENCE, R.I. [Brown University] — Where are you?

Conventional wisdom in brain research says that you just used your hippocampus to answer that question, but that might not be the whole story. The context of place depends on not just how you got there, but also the things you see around you. A new study in Neuron provides evidence that a different part of the brain is important for understanding where you are based on the spatial layout of the objects in that place. The finding, in rats, has a direct analogy to primate neuroanatomy. (more…)

Preschoolers’ Counting Abilities Relate to Future Math Performance, MU Researcher Says

By Guest PostNovember 13, 2012Education, Scienceadults, alphabet, carrots, chronological order, cognitive activity, data, elementary school, essential skill, future success, louis manfra, math score, math skills, memory, missouri, number, numerical values, object, quantity, reciting numbers, set, university, young children

Counting, in addition to reciting, should be emphasized in early childhood education to establish foundation for future academic success

COLUMBIA, Mo. – Along with reciting the days of the week and the alphabet, adults often practice reciting numbers with young children. Now, new research from the University of Missouri suggests reciting numbers is not enough to prepare children for math success in elementary school. The research indicates that counting, which requires assigning numerical values to objects in chronological order, is more important for helping preschoolers acquire math skills.

“Reciting means saying the numbers from memory in chronological order, whereas counting involves understanding that each item in the set is counted once and that the last number stated is the amount for the entire set,” said Louis Manfra, an assistant professor in MU’s Department of Human Development and Family Studies. “When children are just reciting, they’re basically repeating what seems like a memorized sentence. When they’re counting, they’re performing a more cognitive activity in which they’re associating a one-to-one correspondence with the object and the number to represent a quantity.” (more…)

Infant Galaxy Offers Peek at Early Universe

By Guest PostSeptember 25, 2012Science1149 jd, astronomer, big bang, clash, cluster, cosmic, dark matter, Galaxy, gravitational lens, gravity, hubble telescope, light, macs, mass, megan donahue, michigan, Milky Way, NASA, northern hemisphere, object, ordinary galaxy, sky, space telescope, spitzer, state university, universe, zoom lens

EAST LANSING, Mich. — A Michigan State University astronomer is part of an international team of scientists that has discovered a galaxy so far, far away that its light was emitted not all that long after the Big Bang occurred.

The research of MSU’s physics and astronomy professor Megan Donahue and colleagues is detailed in the recent issue of the journal Nature. They found that this galaxy began emitting light “just” 490 million years after the Big Bang, when the universe was only 3.6 percent of its present age. (more…)

New Website Invites Public to Help Identify Seafloor Life and Habitats

By Guest PostSeptember 15, 2012Environment, Scienceamber york, annotation tool, arfon smith, astronomy, citizen science alliance, csa, distribution, financial resource, galaxy zoo, georges bank, habcam, habitat, hole, hugh popenoe, identify, image, institution, jonathan howland, lophius americanus, mapping, monkfish, norman vine, object, oceanographic, old weather, placopecten magellanicus, planet hunters, predator, scallops, scott gallager, seafloor, seafloor explorer, starfish, underwater vehicle, web interface, web programmer, whoi, woods, zooniverse

The public is invited to help identify objects they see in images of the seafloor through a new interactive website called “Seafloor Explorer.” The result of a unique collaboration between oceanographers studying seafloor habitats, Web programmers and social scientists, Seafloor Explorer (www.seafloorexplorer.org) launches September 13.

The team has more than 40 million images, but are launching the site with a preliminary set of 100,000 – all of them taken by HabCam, a habitat mapping underwater vehicle. HabCam was developed and built by the HabCam group, which comprises marine biologists and engineers from the Woods Hole Oceanographic Institution (WHOI) as well as fishermen and other scientists. The Seafloor Explorer interactive website was funded by a grant from the Alfred P. Sloan Foundation, and built in collaboration with the HabCam Group by the Citizen Science Alliance (CSA), the developers behind interactive sites found on Zooniverse.org. (more…)

The Weird World of “Remote Heating”

By Guest PostApril 10, 2012Scienceatom, bounce, carbon nanotube, electric current, electron, john cumings, joule heating, kamal baloch, metal wire, nanoelectronic, nanometer, nanoscale, nature nanotechnology, object, phenomenon, university of maryland

*UMD Researchers Discover Nanoscale Phenomena with Potential for Computer Speed Advances*

College Park, Md.– A team of University of Maryland scientists have discovered that when electric current is run through carbon nanotubes, objects nearby heat up while the nanotubes themselves stay cool, like a toaster that burns bread without getting hot. Understanding this completely unexpected new phenomenon could lead to new ways of building computer processors that can run at higher speeds without overheating.

“This is a new phenomenon we’re observing, exclusively at the nanoscale, and it is completely contrary to our intuition and knowledge of Joule heating at larger scales-for example, in things like your toaster,” says first author Kamal Baloch, who conducted the research while a graduate student at the University of Maryland. “The nanotube’s electrons are bouncing off of something, but not its atoms. Somehow, the atoms of the neighboring materials-the silicon nitride substrate-are vibrating and getting hot instead.” (more…)

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