Newspaper that does not tear. Effective trick and its solution

EFFECTIVE FOCUSES AND THEIR CLUES
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Newspaper that does not tear. Focus Secret

Spectacular tricks and their clues

Directory / Spectacular tricks and their clues

Focus Description:

Show the audience a sheet of newspaper and fold it in half, then in half again. The resulting corner, which corresponds to the center of the newspaper sheet, tear off or cut off with scissors. Give the torn off part to the audience, and let them tear it into small pieces. Insert these pieces between the pages of the same newspaper. Then unfold it, and viewers will see that the torn pieces are gone, and the newspaper is safe and sound.

Focus secret:

The newspaper is prepared in advance. Take two identical newspaper sheets. Cut one in half and glue on the second. You need to stick it so that the edges of both parts of the newspaper coincide, and you should leave a part of one of the side edges unglued (this part is marked with a curly bracket in the figure; the glued part is shaded).

Focus A newspaper that doesn't tear

When the whole structure is folded, the corner of the inner part (uncut "half of the newspaper") goes inside. That is why the outer corner of the cut "half-newspaper" of the sheet can be torn off or cut off without fear of damaging the inner sheet.

If you tear off the corner with your hands, it is pre-folded. Then you pass the torn off part to the audience, they grind it, after which you put the scraps between the pages of the newspaper. It only seems to the viewers that you put the scraps there, in fact you put them inside the glued parts of the newspaper. After that, the newspaper can be deployed - it will be intact.

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The robot anticipates human actions 04.06.2013

The robot, developed at the Cornell Robotics Lab, could be the perfect assistant: it doesn't need to be told to "open the fridge, I'll put a plate in" or "add more beer." Surprisingly, the robot itself is able to assess the situation and act proactively, "kindly" warning all human intentions.

This is indeed a great achievement, since it was previously difficult to take into account the many variables that arise when a person, for example, gets up from the table with a plate of food and intentions incomprehensible to the robot. Nevertheless, engineers from Cornell University managed to solve this problem: now it is enough to silently hint at your desire, and the robot is in a hurry to fulfill it.

The robot is equipped with manipulator arms and a wheeled chassis that provides freedom of movement on a flat surface. The robot's "eyes" are a Microsoft Kinect stereo camera that uses a video database of typical human movements. For example, a robot analyzes how a person interacts with objects on a table. If a person pours a drink from a bottle into a mug and then brings it to his mouth, the robot understands that his owner is drinking and the empty mug needs to be periodically filled. In the same way, the robot “understands” that after the owner has poured cereal and milk into the plate, the food bags can be put back.

The essence of forecasting technology is to choose the most probable scenario. When any movement begins, for example, the owner with a plate in his hands gets up from the table, the robot begins to analyze the possible trajectories of the owner’s movement and, accordingly, his intentions. If the owner goes to the refrigerator, the robot opens the door; if the owner goes to the sink, it turns on the water, gives a towel, etc.

During the experiments, the robot made correct predictions of human intentions 82% of the time 1 second ahead, 71% of the time 3 seconds ahead, and 57% of the time 10 seconds ahead. This is not as small as it seems, because we do not perform actions instantly. For example, if the path to the refrigerator takes 10 seconds, then the robot will have 1 second to understand our intention and as many as 9 seconds to drive up to the refrigerator and open the door, that is, wait for the robot to be "courtesy" while standing with a pot of soup in its hands, it won't take long.

Of course, initially the robot must be taught and not expected from him "understanding" on the first day of operation. But our home activities are not so diverse, so a couple of months can be spent on training. But then you will have a real caring and tireless robot servant, literally predicting every action of the household. Such robots in 5-10 years will be able to provide serious assistance to people with disabilities and just those who are exhausted from household chores. The robot itself should not be very expensive, because its "brain" is actually made from a game console, and its "body" is even simpler than a Segway electric scooter. Of course, some safety systems will need to be added to protect the robot from falls, collisions with people and prevent dangerous movements by manipulators, but similar systems have already been developed for industrial worker robots.

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