The appearance of the magic wand. Effective trick and its solution

EFFECTIVE FOCUSES AND THEIR CLUES
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The appearance of the magic wand. Focus Secret

Spectacular tricks and their clues

Directory / Spectacular tricks and their clues

Focus Description:

A real magician, of course, must have a magic wand. The easiest way to make it out of wood. The diameter of the stick should be 10-15 mm, and the length should be 20-30 cm. It must be pasted over with black glossy paper, and the ends at a distance of 5 cm should be white. Some tricks will require a hollow magic wand. Using a round stick as a template, you can glue a thick tube out of drawing paper or thin cardboard. Of course, and it must be painted exactly like the first stick.

The performer greets the audience and says: "My main assistant is a magic wand, and it is always with me. But it is very burdensome to carry it in your pocket, so I hide it in a matchbox." Next, he shows an ordinary matchbox. The audience laughs, no one can believe that a long magic wand can fit in a matchbox. The magician opens the box and takes out a long wooden stick.

Secret of focus

At the matchbox drawer, cut off one of the narrow walls (Fig. a), slide the drawer into the case and hide the box in your pocket. Stick the stick into the left sleeve of the jacket so that it lies on the forearm, fix it with a rubber pharmacy ring in the wrist area (Fig. b). During the demonstration, you take out a matchbox and transfer it to your left hand. Spectators should not see that one of the walls is missing. Shifting the box to your left hand, you put it on the end of the stick.

Focus The appearance of a magic wand

Open the box and take out the stick from it (fig. c). The box closes and hides in a pocket.

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Smart bracelet will track the composition of sweat 07.02.2016

The new portable sweat analyzer can detect four types of chemicals at once and measure body temperature at the same time.

Our visit to the doctor most often begins with a blood test. No doubt, blood is an excellent indicator of the state of health, and the further, the more diseases can be recognized by the composition of various cells and molecules floating in the bloodstream.

But we have another biological fluid in which a lot of biochemical information can also be found - this is sweat. In addition to water and simple ions, it also contains complex biomolecules, up to proteins, and even now sweat analysis allows diagnosing certain diseases, finding out what substances a person has taken, choosing a convenient exercise regimen, etc. In addition, sweat has one important advantage - for it you do not need to poke something sharp into a finger or a vein. However, until now, in order to make an analysis of sweat, it had to be collected in a special container in order to then give it to a specialist.

With a new device developed by the staff of the University of California at Berkeley, everything will become faster and easier - Wei Gao (Wei Gao) and colleagues have created an electronic analyzer that can be worn on the arm like a bracelet, and which measures body temperature and the chemical composition of sweat in real time . The electronic bracelet is able to determine the amount of sodium and potassium ions, as well as glucose and lactic acid (lactate), and the received data is immediately transmitted to the smartphone.

By themselves, portable sweat analyzers are not new for a long time, but other similar devices can only monitor one substance, one molecule. If we have several sensors at once, this increases the reliability of information: for example, if the level of an ion has dropped sharply, then by other parameters you can tell exactly what the matter is: is it the ion itself, or is it that sweating has stopped, or our gadget just broke.

Obviously, the smart bracelet will be in particular demand among those involved in sports: by the concentration of ions, you can - even without getting off the simulator - understand whether you should take a break and drink water to prevent dehydration and muscle spasm, temperature tracking will prevent overheating , and lactic acid levels may indicate poor circulation. But, of course, such a device will also be useful for general medical purposes, especially if its authors manage, as they plan, to increase the number of molecules that their gadget can detect.

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