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Record pyramid. Focus Secret

Spectacular tricks and their clues

Directory / Spectacular tricks and their clues

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Focus Description:

Take the record and hold it vertically in front of you. Place another record on top of it, and this last one will not fall. Place another one on the top record in the same way and release it in the same way. A pyramid of three gramophone records (Fig. a) will maintain balance.

Focus Pyramid of Records

Focus secret:

The secret of the focus is in the two gramophone records located below. In each of them, through two thin holes, a thin fishing line is threaded and stretched, tinted to resemble a gramophone record and invisible to the audience (Fig. b). On the opposite side, its ends should be secured with knots.

Focus Pyramid of Records

As soon as you attach another similar gramophone record to such a gramophone record, with the fishing line facing you, so that its end goes under the fishing line, it will demonstrate its ability to maintain balance. Another regular gramophone record is attached to the gramophone record located above, with the fishing line turned towards you in the same way. And thanks to the fishing line, it will remain in an upright position and will not fall. Then the pyramid is disassembled.

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Random news from the Archive

The computer reads minds 22.07.2008

A computer program developed by American scientists is able, based on the results of a brain scan, to determine what word a person is thinking about.

Researchers at Carnegie Mellon University led by Tom Mitchell suggested that the way the brain processes nouns depends on how they are related to verbs. "Hammer", for example, activates the areas of the brain associated with movement, "lock" - with spatial information.

Using these assumptions, Mitchell and his colleagues created a program that tried to account for semantic relationships. The program was tested on nine volunteers whose brains were scanned as they looked at cards with nouns written on them.

There were 60 of these words in total, and 58 of them were entered into a computer along with the corresponding maps of brain activity. Then the program analyzed the text, with a volume of 10 billion characters, and established links between the experimental words and the previously introduced 25 verbs. This was followed by a testing phase: the program was tasked with predicting the areas of the brain "responsible" for two missing words when entering. Three quarters of the answers were correct. The idea itself is not new: there is a model that guesses which of the 100 images a person sees.

"Our model involves analyzing not only visual signals, but also the meaning of words," says Tom Mitchell.

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