Countries, peoples, languages - Cities of Asia. Saudi Arabia. Crosswordist's Handbook

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Reference book crossword. Quick word search by mask. Asian cities. Saudi Arabia

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Crosswordist's Handbook

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Countries, peoples, languages / Countries of the world / Cities of Asia. Saudi Arabia

(4)

YANBU - port

(5)

Mecca - religious center

KHUFUF

(6)

DAMMAM - port

JIDDA - port

JIZAN - port

MEDINA - religious center

Riyadh - the capital

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Replace each unknown letter with *. For example, dog * ka, * oshka, we ** a. Pairs е - ё, and - й are equated.

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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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Random news from the Archive

Ideal street lamp 28.04.2013

A team of researchers from Taiwan and Mexico has developed an LED lantern that illuminates the street really perfectly: without shadow spots, with a minimum of light pollution and electricity consumption.

Street lights are a familiar element of the urban landscape, but they make a negative contribution to the environment: they create light pollution, consume a lot of energy, and in addition to all this, they illuminate the streets poorly - they leave unlit areas on the roads and streets. The latest advances in LED lighting have largely solved the problems of energy efficiency, but still a significant part of the light from street lamps does not go where it should. Light pollution problems exist in all large cities: night light interferes with birds, insects, plants, shines through bedroom windows and illuminates the stars, depriving us of the pleasure of admiring the starry sky.

The new LED system solves this problem. It provides uniform illumination of a specific section of the street at low energy costs. Usually street lights are placed in a checkerboard pattern along the streets and freeways. This limits the freedom to place the poles and also creates shadow patches that can only be avoided by installing more lanterns. The new lantern can be adjusted to any contour of the site, for example, it can illuminate only a rectangle of a road, a square of a parking lot, or any other surface shape. At the same time, the optical utilization factor (OUF, the ratio of the emitted light and the luminous flux on the object) of the new lamp reaches 51-81%. For comparison: in the best modern street lamps, OUF does not exceed 45%, that is, most of the light "flies" anywhere, and not to the desired object.

The main feature of the new flashlight is an unusual design. The luminaire consists of three LED clusters, each with a special total internal reflection (TIR) lens. This lens focuses light so that the beams are parallel to each other. This process is called collimation. These lenses send maximum light onto the subject, while an additional diffuser eliminates glare and further reduces light pollution. The combination of collimator and diffuser also allows you to customize the shape of the light spot, for example, for a freeway it will be a rectangle. These light rectangles are easy to connect to perfectly illuminate the road: without dark areas and glare.

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