News tagged with current
Searching for a single-electron source of standard quantized current
Aug 14, 2008 |
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(PhysOrg.com) -- “More than fifteen years ago, efforts were made to come to some kind of practical and standard realization of single-electron sources of quantized current. However, it was too difficult to combine the wanted ...
Bigger not necessarily better, when it comes to brains
Nov 17, 2009 |
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(PhysOrg.com) -- Tiny insects could be as intelligent as much bigger animals, despite only having a brain the size of a pinhead, say scientists at Queen Mary, University of London.
Robotic Devices Providing Home-Care Rehabilitation (w/ Video)
Nov 13, 2009 |
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(PhysOrg.com) -- A group of researchers, at Northeastern University, have developed several portable robotic devices to aid in the rehabilitation process of stroke victims. These devices are small enough for ...
Dopamine enhances expectation of pleasure in humans
Medicine & Health / Neuroscience
Nov 12, 2009 |
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(PhysOrg.com) -- Enhancing the effects of the brain chemical dopamine influences how people make life choices by affecting expectations of pleasure, according to new research from the UCL Institute of Neurology.
New clues to the Falklands wolf mystery
Nov 02, 2009 |
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Ever since the Falklands wolf was described by Darwin himself, the origin of this now-extinct canid found only on the Falkland Islands far off the east coast of Argentina has remained a mystery. Now, researchers ...
Venomous bite: Harmless digestive enzyme evolved into venom in two species
Oct 29, 2009 |
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(PhysOrg.com) -- Biologists have shown that independent but similar molecular changes turned a harmless digestive enzyme into a toxin in two unrelated species -- a shrew and a lizard -- giving each a venomous ...
New evidence of culture in wild chimpanzees
Oct 22, 2009 |
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A new study of chimpanzees living in the wild adds to evidence that our closest primate relatives have cultural differences, too. The study, reported online on October 22nd in Current Biology shows that neighb ...
Scientists bend nanowires into 2-D and 3-D structures
Oct 21, 2009 |
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(PhysOrg.com) -- Taking nanomaterials to a new level of structural complexity, scientists have determined how to introduce kinks into arrow-straight nanowires, transforming them into zigzagging two- and three-dimensional ...
Physicists Measure Elusive 'Persistent Current' That Flows Forever
Oct 08, 2009 |
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(PhysOrg.com) -- Physicists at Yale University have made the first definitive measurements of "persistent current," a small but perpetual electric current that flows naturally through tiny rings of metal wire ...
Silver Nanoparticles Give Polymer Solar Cells A Boost
Nanotechnology / Nanomaterials
Oct 05, 2009 |
4.3 / 5 (13) |
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(PhysOrg.com) -- Small bits of metal may play a new role in solar power. Researchers at Ohio State University are experimenting with polymer semiconductors that absorb the sun’s energy and generate electricity. The goal: ...
Carbon nanotubes could make efficient solar cells
Nanotechnology / Nanomaterials
Sep 10, 2009 |
5 / 5 (21) |
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(PhysOrg.com) -- Cornell researchers fabricated, tested and measured a simple solar cell called a photodiode, formed from an individual carbon nanotube.
We are all mutants: Measurement of mutation rate in humans by direct sequencing
Aug 27, 2009 |
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An international team of 16 scientists today reports the first direct measurement of the general rate of genetic mutation at individual DNA letters in humans. The team sequenced the same piece of DNA - 10,000,000 or so letters ...
Scientists show that people really walk in circles when lost (w/ Video)
Aug 20, 2009 |
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(PhysOrg.com) -- Scientists in the Multisensory Perception and Action Group at the Max Planck Institute for Biological Cybernetics in Tübingen, Germany, led by Jan Souman and Marc Ernst, have now presented ...
Facial expressions show language barriers too
Medicine & Health / Psychology & Psychiatry
Aug 13, 2009 |
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(PhysOrg.com) -- People from East Asia tend to have a tougher time than those from European countries telling the difference between a face that looks fearful versus surprised, disgusted versus angry, and ...
Aesop's fable 'the crow and the pitcher' more fact than fiction (w/ Video)
Aug 06, 2009 |
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In Aesop's fable 'The crow and the pitcher' a thirsty crow uses stones to raise the level of water in a pitcher to quench its thirst. A new study published online today (06 August) in the journal Current Bi ...
