Self-tie rope. Effective trick and its solution

EFFECTIVE FOCUSES AND THEIR CLUES
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Self-tie rope. Focus Secret

Spectacular tricks and their clues

Directory / Spectacular tricks and their clues

Focus Description:

Take a rope, tie a knot in its middle and hold the rope by one end. A miracle will happen to the rope: the knot on it will instantly untie on its own.

Focus secret:

A fishing line about a meter long is attached to the lower end of the rope. When you hold the rope in your hand, part of the line is on the floor. The knot on the rope consists of one turn and is not tightened. Stepping on the lying fishing line with your foot, you raise your hand with the rope slightly up.

Focus Self-Untying Rope

The line passing through the knot is stretched and pulls the rope out of the knot. For a greater guarantee of success, it is better to tie the knot not in the middle of the rope, but closer to its lower end.

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Random news from the Archive

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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