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How did the synthesis of playing and topographic maps help American prisoners in German prisons? Detailed answer

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How did the synthesis of playing and topographic maps help American prisoners in German prisons?

During the Second World War, the well-known American manufacturer of playing cards Bicycle, commissioned by the US government, made special decks that were sent to captured Americans in German prisons. When wet, the maps showed pieces of a topographic map showing escape routes.

Authors: Jimmy Wales, Larry Sanger

 Random interesting fact from the Great Encyclopedia:

What do German men metaphorically refer to as dragon food?

In German, there is the word Drachenfutter, which literally translates as "dragon food". German husbands call this term a gift to their wife - a box of chocolates or a bouquet of flowers - which they are forced to present, guilty of something, for example, returning home late drunk.

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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. ... >>

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Random news from the Archive

Robot sorting flies 21.06.2015

For many years, scientists have been using fruit flies in various studies. A fairly simple body of flies is an ideal material for genetic experiments.

However, before research, fruit flies require careful sorting, which is a rather tedious task. Therefore, scientists from Stanford University (USA) built a robot on which they shifted this hard work.

To "see" the fruit flies, the robot turns on infrared light, which bounces off the fly's thorax, making it visible to the camera. The selected Drosophila is then taken using a tiny pneumatic tube.

The robot is able to grab flies much faster and more accurately than a human - it processes more than 1000 fruit flies in a 10-hour working "shift". The device analyzes the physical attributes of each fruit flies, sorts them by sex, and is even capable of dissecting their tiny brains.

In the future, scientists plan to train a precision robot to independently conduct experiments on fruit flies, freeing graduate students and interns from this.

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