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Garmin babyCam - car camera for monitoring children

21.10.2015

An interesting novelty was announced by Garmin: a device called babyCam is a compact car camera designed to monitor children in the back seat.

The gadget attaches to the headrest leg of the front or rear seat (depending on how the child is seated) and transmits video wirelessly to the screen of a compatible Garmin GPS navigator (sold separately). This saves the motorist from having to turn around to see what his child is doing. Accordingly, the driver is less likely to be distracted from the road, which increases traffic safety.

babyCam transmits video in 640 x 480 resolution at 30 frames per second. The night vision function provides a high-quality picture in the dark or in low light conditions.

The camera can be powered from the car's on-board network via a cable with a USB connector or from two AA batteries. In the second case, the automatic on / off function helps to save charge when the driver activates the child monitoring mode or switches to navigation. Up to four babyCam cameras can be installed in the car to view the image from different angles or in different areas - say, on the second and third rows of seats.

The dimensions of the device are 86,5 x 39,9 x 43,7 mm, weight - 53 grams. The novelty will go on sale in January 2016 at an estimated price of 200 USD.

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Nanoparticles catch light 20.07.2008

Scientists from Sweden have learned how to create periodic nanostructures in a single laser pulse.

A layer of nanoparticles, such as gold or silver, is poured onto a thin membrane, and then it is illuminated with a pulsed laser beam. Nanoparticles absorb light, the free electrons contained in them begin to oscillate together with the so-called plasma frequency.

If the particle size is chosen correctly, this frequency will be just what is needed to excite similar vibrations in the membrane and turn it into a waveguide. As a result, the energy of the laser pulse is transferred to the membrane, and a standing wave appears on it. In places of its crests, the temperature can be very high, so those nanoparticles that are located above them will melt and flow into the cold troughs of a standing wave, where they will freeze again. So on the membrane you get a periodic relief.

The whole process takes a few nanoseconds, and the relief period can be either longer or shorter than the radiation wavelength.

“By choosing the parameters of optically active particles, we can turn a nanometer-sized membrane or fiber into a waveguide. By the way, using plasmon resonance, you can significantly increase the efficiency of light absorption in solar cells,” says Dinko Chakarov, the author of the work.

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