News tagged with limiter
Turning heat to electricity... efficiently
(PhysOrg.com) -- In everything from computer processor chips to car engines to electric powerplants, the need to get rid of excess heat creates a major source of inefficiency. But new research points the way ...
Nov 18, 2009 |
4.8 / 5 (67) |
9
Physicists see solution to critical barrier to fusion
(Phys.org) -- Physicists have discovered a possible solution to a mystery that has long baffled researchers working to harness fusion. If confirmed by experiment, the finding could help scientists eliminate ...
Apr 23, 2012 |
4.4 / 5 (49) |
57
|
Novel negative-index metamaterial that responds to visible light designed
A group of scientists led by researchers from the California Institute of Technology has engineered a type of artificial optical material—a metamaterial—with a particular three-dimensional structure such that ...
Apr 22, 2010 |
4.8 / 5 (43) |
10
|
Scientists design solar cells that exceed the conventional light-trapping limit
(PhysOrg.com) -- The best performing solar cells are those that are thick enough to absorb light from the entire solar spectrum, while the cheapest solar cells are thin ones, since they require less, and potentially ...
Jan 20, 2012 |
4.7 / 5 (37) |
27
|
Faster than light neutrinos? More like faulty wiring
You can shelf your designs for a warp drive engine (for now) and put the DeLorean back in the garage; it turns out neutrinos may not have broken any cosmic speed limits after all.
Feb 22, 2012 |
3.9 / 5 (40) |
123
|
Explained: The Carnot Limit
Anytime engineers try to design a new kind of heat-based engine or improve on an existing design, they bump up against a fundamental efficiency limit: the Carnot Limit.
May 19, 2010 |
4.7 / 5 (32) |
18
|
A breakthrough in superlens development: Cheap, simple lens to let us see a single virus
A superlens would let you see a virus in a drop of blood and open the door to better and cheaper electronics. It might, says Durdu Guney, make ultra-high-resolution microscopes as commonplace as cameras in ...
Jan 09, 2012 |
4.8 / 5 (29) |
4
|
Radiation Review: Some People May be 'Allergic' to Cell Phones, Computers
(PhysOrg.com) -- How exactly does the radiation from electromagnetic fields (EMF) affect the human body? Is it possible that cell phones, computer monitors, TVs, and other electronic devices - which operate ...
Medicine & Health / Medical research
May 15, 2009 |
3.4 / 5 (38) |
31
Computers Faster Only for 75 More Years? Physicists determine nature's limit to making faster processors
With the speed of computers so regularly seeing dramatic increases in their processing speed, it seems that it shouldn't be too long before the machines become infinitely fast -- except they can't.
Oct 14, 2009 |
4.3 / 5 (27) |
32
Physicists develop 3D metamaterial nanolens that achieves super-resolution imaging
(PhysOrg.com) -- A research team from Northeastern University has developed a new nanolens that can beat the diffraction limit to achieve so-called super-resolution imaging, better than can be achieved by current technology. ...
Jan 18, 2010 |
4.7 / 5 (24) |
3
|
New lens doubles the resolution of conventional microscopes
(PhysOrg.com) -- Conventional lenses can resolve structures around 200 nanometers (nm) in size, but scientists in Europe have for the first time developed a lens capable of achieving optical resolution of ...
Mar 25, 2011 |
4.8 / 5 (23) |
3
|
Correcting a trick of the light brings molecules into view
Conventional wisdom holds that optical microscopy can't be used to "see" something as small as an individual molecule. But as it is wont, clever science has once again overturned conventional wisdom. Secretary ...
Jul 14, 2010 |
5 / 5 (20) |
1
|
Quantum Sensor Developed by LSU Researcher Breaks New Limits
(PhysOrg.com) -- Researchers at Louisiana State University have invented an optical sensor that surpasses a quantum limit to sensitivity previously believed to be unbeatable. The breakthrough has a broad array of applications, ...
Mar 16, 2010 |
4.6 / 5 (21) |
16
|
Coke cans focus sound waves beyond the diffraction limit
(PhysOrg.com) -- When trying to focus sound waves into as small an area as possible, scientists run into a fundamental limit called the diffraction limit. That is, when sound waves are focused into a region ...
Jul 12, 2011 |
4.7 / 5 (20) |
27
|
Explained: The Shannon limit
It's the early 1980s, and you’re an equipment manufacturer for the fledgling personal-computer market. For years, modems that send data over the telephone lines have been stuck at a maximum rate of 9.6 kilobits ...
Technology / Computer Sciences
Jan 19, 2010 |
4.4 / 5 (19) |
5
|
