News tagged with theoretical models
Carbon Atmosphere Discovered on Neutron Star
Nov 04, 2009 |
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(PhysOrg.com) -- Evidence for a thin veil of carbon has been found on the neutron star in the Cassiopeia A supernova remnant. This discovery, made with NASA's Chandra X-ray Observatory, resolves a ten-year ...
There's a speed limit to the pace of evolution, biologists say
Nov 02, 2009 |
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Researchers at the University of Pennsylvania have developed a theoretical model that informs the understanding of evolution and determines how quickly an organism will evolve using a catalogue of "evolutionary speed limits." ...
Study: Evolutionary past may determine how we choose leaders
Other Sciences / Social Sciences
Oct 21, 2009 |
2.5 / 5 (11) |
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(PhysOrg.com) -- Why did Barack Obama win the US election and did the fact he is over six feet tall influence the voters? The authors of a paper published in Current Biology this month argue that due to 'a ...
Radar Map of Buried Mars Layers Matches Climate Cycles
Space & Earth / Space Exploration
Sep 22, 2009 |
4.3 / 5 (7) |
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(PhysOrg.com) -- New, three-dimensional imaging of Martian north-polar ice layers by a radar instrument on NASA's Mars Reconnaissance Orbiter is consistent with theoretical models of Martian climate swings ...
Geobiologists propose that the earliest complex organisms fed by absorbing ocean buffet
Space & Earth / Earth Sciences
Aug 19, 2009 |
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Research at Virginia Tech has shown that the oldest complex life forms -- living in nutrient-rich oceans more than 540 million years ago - likely fed by osmosis.
Model suggests how life's code emerged from primordial soup
Aug 07, 2009 |
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(PhysOrg.com) -- In 1953, Stanley Miller filled two flasks with chemicals assumed to be present on the primitive Earth, connected the flasks with rubber tubes and introduced some electrical sparks as a stand-in for lightning. ...
Social scientist suggests new research framework to study complex systems
Other Sciences / Social Sciences
Jul 23, 2009 |
3.7 / 5 (3) |
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The often-used one-size-fits-all approach to policies aimed at achieving sustainable social-ecological systems needs to be updated with a diagnostic tool to help scholars from multiple disciplines better frame the question ...
Fundamental flaw in transistor noise theory discovered
May 21, 2009 |
4.5 / 5 (20) |
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(PhysOrg.com) -- Chip manufacturers beware: There's a newfound flaw in our understanding of transistor noise, a phenomenon affecting the electronic on-off switch that makes computer circuits possible. According ...
Study plunges standard Theory of Cosmology into Crisis
May 05, 2009 |
4.5 / 5 (47) |
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As modern cosmologists rely more and more on the ominous “dark matter” to explain otherwise inexplicable observations, much effort has gone into the detection of this mysterious substance in the last two decades, yet no direct ...
Researchers explore magnetic properties of iron-based superconductors
Mar 16, 2009 |
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Scientists at the Naval Research Laboratory (NRL) have proposed theoretical models to explain the normal magnetic properties in iron-based superconductors. This research was published in the December 21, 2008 ...
Important new model shows how proteins find the right DNA sequences
Mar 16, 2009 |
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(PhysOrg.com) -- Researchers at Uppsala University and Harvard University have collaboratively developed a new theoretical model to explain how proteins can rapidly find specific DNA sequences, even though ...
'Undesirable' evolution can be reversed in fish, scientists show
Mar 03, 2009 |
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Intensive harvesting of the largest fish over many decades, while leaving the small fish behind, may have unintentionally genetically reprogrammed many species to grow smaller, said lead author Dr. David O. ...
Why Don’t More Animals Change Their Sex
Biology /
Feb 02, 2009 |
5 / 5 (3) |
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(PhysOrg.com) -- Most animals, like humans, have separate sexes — they are born, live out their lives and reproduce as one sex or the other. However, some animals live as one sex in part of their lifetime and then switch ...
Scientists Propose Thermal Memory to Store Data
Jan 07, 2009 |
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Most computers today store memory electronically, by maintaining a certain voltage. In contrast, a new kind of memory that stores data thermally, by maintaining temperature, is being investigated by researchers Lei Wang of ...
