Facial disappearance. Effective trick and its solution

EFFECTIVE FOCUSES AND THEIR CLUES
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Facial disappearance. Focus secret

Spectacular tricks and their clues

Directory / Spectacular tricks and their clues

Focus Description:

There are ways in which the paradox with lines can be made interesting and entertaining. This can be achieved, for example, by replacing the disappearance and appearance of lines by the same disappearance and appearance of plane figures.

Images of pencils, cigarettes, bricks, high-crowned hats, glasses of water, and other vertically extended objects, the nature of the image of which remains the same before and after the shift, are especially suitable here. With some artistic ingenuity, you can take more complex objects. Look, for example, at the disappearing face:

Focus Fade Face

By shifting the lower band on the top of the picture to the left, all the hats remain unaffected, but one face disappears completely! (see bottom of picture).

It is pointless to ask what kind of face, because when shifting, four faces are divided into two parts. These parts are then redistributed, with each face receiving several additional features: one, for example, a longer nose, another a more elongated chin, etc. However, these small redistributions are ingeniously hidden, and the disappearance of the entire face is, of course, much more striking than the disappearance of a piece of the line.

Author: M.Gardner

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Random news from the Archive

Walking is good for the brain 05.05.2017

Ernest Greene and colleagues at New Mexico Highland University have found that simply walking activates your brain - hitting your foot while walking sends pressure waves through your arteries that significantly alter and can increase blood flow to your brain.

Until recently, it was believed that the blood supply to the brain (cerebral blood flow or CVD) is automatically regulated by the body and more or less independent of changes in blood pressure caused by exercise or stress. It has previously been determined that the impact of the foot during running (4-5 G) causes significant retrograde (reverse) waves through the arteries, which are synchronized with heart rate and stride speed to dynamically regulate blood flow to the brain.

In this study, researchers used a non-invasive ultrasound method to measure carotid internal velocity waves and artery diameters to calculate cerebral blood flow in both hemispheres of the brain of 12 healthy young adults while standing still and walking uniformly at a speed of 1 m/sec.

It turned out that while the pressure on the foot during walking is weaker than during running, walking still generates large pressure waves in the body, which significantly increase blood flow to the brain. Although the effect of walking on cerebral blood flow was less significant than that caused by running, it was more pronounced than that observed during cycling, which does not affect the foot at all.

"New evidence now suggests that blood flow to the brain is highly dynamic and directly dependent on cyclic aortic pressures that interact with retrograde pressure impulses from exposure to the legs," the authors state. pressure on pedals, walking and running. It is hypothesized that these actions may optimize perfusion, function, and overall sense of well-being during exercise."

"It's amazing that it took us so long to finally measure this apparent hydraulic effect on cerebral blood flow," explained Ernest Greene. rhythm (about 120 per minute) when we move vigorously.

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