ScienceDaily: Top Technology News |
- Computer simulations reveal universal increase in electrical conductivity
- Magnetization controlled at picosecond intervals
- Device captures signatures and fingerprints with tiny LEDs
- Shadows and light: New software to detect forged photos
| Computer simulations reveal universal increase in electrical conductivity Posted: 11 Aug 2013 12:06 PM PDT Computer simulations have revealed how the electrical conductivity of many materials increases with a strong electrical field in a universal way. This development could have significant implications for practical systems in electrochemistry, biochemistry, electrical engineering and beyond.  |
| Magnetization controlled at picosecond intervals Posted: 11 Aug 2013 12:06 PM PDT A terahertz laser makes it possible to control a material's magnetization at a timescale of picoseconds (0.000,000,000,001 seconds). In their experiment, the researchers shone extremely short light pulses from the laser onto a magnetic material, where the magnetic moments - "elementary magnets" - were all aligned in parallel. The light pulse's magnetic field was able to deflect the magnetic moments from their idle state in such a way that they exactly followed the change of the laser's magnetic field with only a minor delay.  |
| Device captures signatures and fingerprints with tiny LEDs Posted: 11 Aug 2013 12:05 PM PDT Researchers want to put your signature up in lights. Using thousands of nanometer-scale wires, the researchers have developed a sensor device that converts mechanical pressure – from a signature or a fingerprint – directly into light signals that can be captured and processed optically.  |
| Shadows and light: New software to detect forged photos Posted: 05 Aug 2013 12:24 PM PDT Researchers have developed new software to detect faked photos, using a geometric algorithm to locate inconsistent shadows that are not obvious to the naked eye. The new method debunks claims that the Apollo 11 lunar landing photo is fake.  |
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