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Top node it is used on the tops of the masts of sailing ships instead of yokes with butts (forged rings with brackets) for fastening the backstay and headstay. This knot was used for fastening temporary guys when installing masts and driving piles.

In English, the name of this knot is "Shamrock Knot", which means shamrock (hare cabbage or sorrel), which is the emblem of Ireland. The knot can be used on the shore for attaching flagpoles and antenna masts, trees, seedlings, etc. If you have a jug whose neck has a more or less large protrusion, you can make a convenient handle for it with the help of a ready-made knot.

But the best way, as the author was convinced, is to use this knot for carrying watermelons and large melons. After all, once on military sailing ships it was used to carry nuclei.

From a piece of any cable 3 meters long, a reliable basket for the largest watermelon is obtained. At the same time, the knot should not be completely tightened, and its three loops should be tied with two free ends.


Rice. 80. Top knot

Author: Skryagin L.N.

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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. ... >>

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LED textile 12.04.2020

Classical light emitting elements are arranged in such a way that the light emitting layer is enclosed between two electrodes that supply power. For light sources in the form of filaments and fabrics made from such filaments, such a structure is not the best fit. Scientists from the Republic of Korea were able to get around this limitation and created a luminous textile with electrodes inside the luminescent layer.

It would be tempting to produce garments, advertising posters and other items made from materials like fabrics using woven light structures. The traditional representation of light-emitting elements clearly does not contribute to this.

A group of scientists from the Korean Institute of Science and Technology Daegu Gyeongbuk (DGIST) set themselves the task of developing a flexible luminescent device in which the electromagnetic field that excites the glow would not propagate perpendicular to the electrodes, but along the plane in which they are located. Also, this design made it possible to hide the power supply electrodes inside the luminescent layer and not block the surface of the light-emitting device.

The flexible luminescent textile developed by the group is a film of polydimethylsiloxane (PDMS) and zinc sulfide (ZnS) with flexible conductive electrodes embedded in the layer. Such a film, firstly, has mechanoluminescence (it glows from mechanical influences) and, secondly, electroluminescence (it glows when power is applied to the electrodes, between which an electromagnetic field arises).

Prototypes of luminous fibers and fabrics made from them showed high luminescence efficiency and sufficient mechanical strength. But when this technology can be sent to commercial production is not specified.

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