Ultrasonic dog repeller. Scheme, description

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Ultrasonic dog repeller. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Security and safety. Personal safety

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Latest news of science and technology, new electronics:

Machine for thinning flowers in gardens 02.05.2024

In modern agriculture, technological progress is developing aimed at increasing the efficiency of plant care processes. The innovative Florix flower thinning machine was presented in Italy, designed to optimize the harvesting stage. This tool is equipped with mobile arms, allowing it to be easily adapted to the needs of the garden. The operator can adjust the speed of the thin wires by controlling them from the tractor cab using a joystick. This approach significantly increases the efficiency of the flower thinning process, providing the possibility of individual adjustment to the specific conditions of the garden, as well as the variety and type of fruit grown in it. After testing the Florix machine for two years on various types of fruit, the results were very encouraging. Farmers such as Filiberto Montanari, who has used a Florix machine for several years, have reported a significant reduction in the time and labor required to thin flowers. ... >>

Advanced Infrared Microscope 02.05.2024

Microscopes play an important role in scientific research, allowing scientists to delve into structures and processes invisible to the eye. However, various microscopy methods have their limitations, and among them was the limitation of resolution when using the infrared range. But the latest achievements of Japanese researchers from the University of Tokyo open up new prospects for studying the microworld. Scientists from the University of Tokyo have unveiled a new microscope that will revolutionize the capabilities of infrared microscopy. This advanced instrument allows you to see the internal structures of living bacteria with amazing clarity on the nanometer scale. Typically, mid-infrared microscopes are limited by low resolution, but the latest development from Japanese researchers overcomes these limitations. According to scientists, the developed microscope allows creating images with a resolution of up to 120 nanometers, which is 30 times higher than the resolution of traditional microscopes. ... >>

Air trap for insects 01.05.2024

Agriculture is one of the key sectors of the economy, and pest control is an integral part of this process. A team of scientists from the Indian Council of Agricultural Research-Central Potato Research Institute (ICAR-CPRI), Shimla, has come up with an innovative solution to this problem - a wind-powered insect air trap. This device addresses the shortcomings of traditional pest control methods by providing real-time insect population data. The trap is powered entirely by wind energy, making it an environmentally friendly solution that requires no power. Its unique design allows monitoring of both harmful and beneficial insects, providing a complete overview of the population in any agricultural area. “By assessing target pests at the right time, we can take necessary measures to control both pests and diseases,” says Kapil ... >>

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Silicone instead of copper 12.02.2013

A team of researchers from IBM and Dow Corning Electronics announces a discovery that will allow silicon to displace copper in creating fast, energy-efficient photonic connections on printed circuit boards. The team demonstrated optical waveguides using a photonic polymer at Photonics West 2013 in early February.

IBM says its work with Dow Corning provides an integrated approach to optical communications, similar to how metal conductors now conduct electrical signals on traditional printed circuit boards. Silicone polymer waveguides are "highly flexible and resistant to high temperatures," says Bert-Jan Offrein, manager of the Photonics Research Group at IBM Research in Zurich. Offrain reported that neither twisting nor deformation was observed on bends with a radius of up to 1 mm, and also under extreme operating conditions at 85% humidity and a temperature of +85°C.

Silicone allows you to use the same basic element as in CMOS crystals - silicon - but in a flexible form, which allows the beam of light to pass through bends and turns with very little distortion. As a result, very fast and energy efficient photonic interconnects can be fabricated, capable of transferring the exabytes of data required for future data centers and supercomputers.

Eric Peeters, vice president of Dow Corning Electronic Solutions, predicted that the new material will enable "on-board silicon-based communications that will quickly replace conventional electronic signaling methods."

Silicone polymer is born as a liquid like other optical materials such as glass, but when left under normal atmospheric conditions, it cures in less than 45 minutes. The material also showed excellent adhesion to traditional PCB materials such as polyimide, has a loss of no more than 0,03 dB per centimeter, remains stable for more than 2000 hours at high temperature and humidity, withstands 500 temperature cycles in the range of -18 ... +120 °C.

The presentation at Photonics West "Stable and Machinable Optical Silicone for Low Loss Polymer Waveguides" was presented by Brandon Swatowski, Project Engineer at Dow Corning Electronics Solutions.

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