Hi Tech & Innovation

Self-driving bus services tested out in Tallinn

Two types of self-driving bus are being tested out in Estonia this week as part of initiatives that could revolutionise public transport in Europe.

Computer Sciences

Smartphone videos produce highly realistic 3-D face reconstructions

Normally, it takes pricey equipment and expertise to create an accurate 3-D reconstruction of someone's face that's realistic and doesn't look creepy. Now, Carnegie Mellon University researchers have pulled off the feat using ...

Engineering

New laser hits mark on cancer imaging to airport security

The terahertz frequency range—which sits in the middle of the electromagnetic spectrum between microwaves and infrared light—offers the potential for high-bandwidth communications, ultrahigh-resolution imaging, precise ...

Engineering

Additively manufactured titanium alloy parts

Aerospace manufacturers, industries, and government agencies like the design freedom and convenience afforded from additive manufacturing—a process similar to 3-D printing. But do these parts have the same properties, especially ...

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Laser

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.

This text uses material from Wikipedia, licensed under CC BY-SA