Engineering
Researchers have not yet gotten the additive manufacturing (or 3D printing) of metals down to a science completely. Gaps in our understanding of what happens within metal during the process have made results inconsistent. ...
Mar 20, 2023
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250
Engineering
Our roads might one day be safer thanks to a completely new type of system that overcomes some of lidar's limitations. Lidar, which uses pulsed lasers to map objects and scenes, helps autonomous robots, vehicles and drones ...
Feb 9, 2023
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54
Engineering
A new North Carolina State University study, performed in collaboration with battery testing researchers at the U.S. Department of Energy's Oak Ridge National Laboratory, shows that extremely short pulses from a high-powered ...
Feb 8, 2023
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158
Engineering
A new method could greatly reduce the time and expense needed for certain important safety checks in nuclear power reactors. The approach could save money and increase total power output in the short run, and it might increase ...
Jan 10, 2023
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33
Engineering
In May 2022, the TeraByte InfraRed Delivery (TBIRD) payload onboard a small CubeSat satellite was launched into orbit 300 miles above Earth's surface. Since then, TBIRD has delivered terabytes of data at record-breaking rates ...
Dec 1, 2022
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144
Energy & Green Tech
Along with bitterly cold temperatures, winter usually brings dry air and the occasional zap of static electricity. Those shocks might be annoying, but researchers are working to harness that otherwise wasted energy with triboelectric ...
Nov 21, 2022
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38
Robotics
Scientists from the Department of Mechanical Engineering at Osaka University introduced a method for manufacturing complex microrobots driven by chemical energy using in situ integration. By 3D-printing and assembling the ...
Nov 17, 2022
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45
Electronics & Semiconductors
Researchers from LP3 Laboratory in France developed a light-based technique for local material processing anywhere in the three-dimensional space of semiconductor chips. The direct laser writing of new functionalities opens ...
Nov 8, 2022
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415
Security
Self-driving cars, like the human drivers that preceded them, need to see what's around them to avoid obstacles and drive safely.
Oct 31, 2022
4
266
Engineering
A trio of researchers from Heriot-Watt University, University Paul Sabatier and the University of Sussex has developed an AI-based device equipped with a laser that can be used to shoot and kill roaches automatically. In ...
A laser is a device that emits light (electromagnetic radiation) through a process called stimulated emission. The term laser is an acronym for light amplification by stimulated emission of radiation. Laser light is usually spatially coherent, which means that the light either is emitted in a narrow, low-divergence beam, or can be converted into one with the help of optical components such as lenses. Typically, lasers are thought of as emitting light with a narrow wavelength spectrum ("monochromatic" light). This is not true of all lasers, however: some emit light with a broad spectrum, while others emit light at multiple distinct wavelengths simultaneously. The coherence of typical laser emission is distinctive. Most other light sources emit incoherent light, which has a phase that varies randomly with time and position.
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