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The bird flies out and helps catch the robber

18.10.2001

Experienced photographers know that when you're shooting a dog or a small child, snapping your fingers or whistling to get your subject to look directly at the camera is a must. A purely instinctive reaction to search for the source of an unexpected sound is triggered (academician Pavlov called it the "what is it?" reflex).

Professor Deborah Widington from the University of the English city of Leeds suggests using a similar method to catch criminals. TV cameras placed in shops and banks do not always catch the image of a robber in full face.

For more successful video shooting, you need to combine a camera with a speaker that emits a specially synthesized sharp sound with a wide frequency spectrum at the time of shooting. As experiments have shown, it is simply impossible not to turn to him, and a recognizable portrait of a robber is almost guaranteed.

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Thubber: super elastic rubber with metal properties 18.02.2017

Scientists at Carnegie Mellon University have developed a thermally conductive rubber material that could be a breakthrough in the development of soft stretchable mechanisms and electronics.

The new material, dubbed "thubber", is an electrically insulating material with the thermal conductivity of metals, the elasticity of soft, biological tissues, and can stretch to six times its original length.

"Our combination of high thermal conductivity and elasticity is particularly important for the rapid dissipation of heat in devices such as body-worn electronics or soft robots that require mechanical flexibility and stretchable functionality," the researchers say. Such materials can also be used in sportswear and medicine, energy and transportation.

The key ingredient of the new rubber is a suspension of non-toxic liquid metal microdroplets. The liquid state allows the metal to deform along with the surrounding rubber at room temperature. When the rubber is stretched, the droplets form elongated trajectories that are effective in dissipating heat. Despite the large amount of metal, the material also retains electrical insulating properties.

To demonstrate the properties of the material, the scientists attached LEDs to a strip of thubber to make a lamp that any runner can wear around their leg. The new material dissipates the heat from the diodes, which would otherwise burn a person. The researchers also created a soft robotic fish that swims with the help of a thubber tail without the help of conventional motors or gears.

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