Menu English Ukrainian russian Home

Free technical library for hobbyists and professionals Free technical library


EFFECTIVE FOCUSES AND THEIR CLUES
Free library / Directory / Spectacular tricks and their clues

Spectacular tricks and their clues

Spectacular tricks and their clues

Directory / Spectacular tricks and their clues

Comments on the article Comments on the article

Tricks with scarves:

See other articles Section Spectacular tricks and their clues:

See also: Experiments in physics and chemistry at home

500 interesting experiments in physics and chemistry for children:

 


 

Latest news of science and technology, new electronics:

Blinking of the magician and his audience 19.05.2024

Magic and illusions have always captured the attention of the public, but what happens behind the scenes of the magician and in the brains of his audience? Scientists from the UK decided to solve this mystery by conducting a new study involving ten illusionists of varying experience. Illusionists, some of whom had been practicing magic for more than half a century, others for only six months, were invited to demonstrate the same trick - the popular coin trick. Recordings of their performances during training and on stage showed that each of them began to blink significantly more often at the moment of performing the trick. The study's findings indicate that magicians' blink rate may be related to unconscious aspects of their performance. At the same time, as scientists have found, spectators also begin to blink more often, following the movements of the illusionist. This observation supports the idea that magicians may be catalysts for blinking in audiences. Additional research has shown that magicians blink more often during ... >>

Ultrasonic coffee machine 19.05.2024

Iced coffee has become an integral part of coffee culture in recent years. Therefore, engineers from the University of New South Wales decided to improve its preparation. They have developed an ultrasonic coffee machine that reduces the cold brew time for ground coffee beans from 12-24 hours to significantly less time. Iced coffee, or "Cold brew", is popular due to its smoothness, low acidity and low bitterness. It is prepared by steeping ground coffee in cold water for a long time. Unlike traditional hot brewing, which often imparts bitterness to coffee, cold brewing extracts more delicate and complex flavors from the coffee beans. The innovative system, presented by a team of engineers, introduces ultrasonic technology into the coffee preparation process. The system uses ultrasonic waves to speed up the process of extracting oils, flavor and aroma from ground coffee. This allows you to significantly reduce the time ... >>

The speech of sperm whales is similar to that of humans 18.05.2024

In the world of the ocean, where the mysterious and unknown coexists with the studied, sperm whales, with their huge brains, are of particular interest to science. Researchers, working with a huge array of audio recordings collected during the Dominica Sperm Whale Project (DSWP) - more than 8000 recordings, seek to unravel the secrets of their communication and understand the structure and complexity of the language of these mysterious creatures. By studying in detail the recordings of 60 sperm whales in the eastern Caribbean, scientists have revealed surprising features of their communication, revealing the complexity of their language. "Our observations indicate that these whales have a highly developed combinatorial communication system, including rubato and ornaments, which indicates their ability to quickly adapt and vary during communication. Despite significant differences in evolution, sperm whales have elements in their communication that are characteristic of human communication," says Shane Gero, a biologist at Carleton University and director of the CETI project. Issl ... >>

Random news from the Archive

Glucose control patch 29.09.2020

A team of researchers from the Institute of Industrial Sciences at the University of Tokyo has developed a microneedle patch combined with a paper sensor to monitor glucose levels.

Microneedles are tiny needles less than 1 mm long that are so short that they do not contact neurons when they enter the skin, meaning they do not cause pain. They do not pierce the skin to the point of blood, but they can collect subcutaneous fluid, which contains most of the important biomarkers.

Engineers around the world have already developed several types of microneedles, but until now, creating a practical device that quickly analyzes a liquid and produces a result seemed elusive.

Japanese scientists have overcome this problem by developing a way to combine porous microneedles with paper sensors. The result is an inexpensive, painless, easy-to-use, and highly practical one-time test for diagnosing prediabetes or controlling blood sugar levels in diabetes.

To produce such a diagnostic device, microneedles are first made. To do this, the molten mixture of biodegradable polymer and salt is poured into the cone-shaped cavities of the microplate. Then the form is turned over and the bottom of the microneedles is placed on a sheet of paper and pressed under pressure. This causes the mixture to penetrate the pores of the paper and secure the microneedles. After being demoulded, the needles are cooled in a special solution that draws out all the salt from them, leaving behind thousands of holes or pores through which the subcutaneous fluid can flow. Finally, a paper glucose sensor is attached to the paper base of the microneedle set using double-sided tape.

The scientists tested the patch on an agarose gel in which glucose was dissolved. Liquid from the gel flowed through the porous microneedles into the paper substrate, and from there onto the sensor layer. The glucose concentration was accurately recorded by the color change of the paper sensor.

The big advantage of the new technology is that its use does not require any medical knowledge or special training. In addition, the microneedles are biosoluble and biocompatible, meaning they will not cause any problems even if they remain in the skin after the dressing is removed.

Other interesting news:

▪ Only half of US residents use landlines

▪ Jellyfish restore the body

▪ Toshiba N300 Pro and X300 Pro hard drives

▪ Champagne for astronauts

▪ Silicon nanotube anodes triple the capacity of lithium-ion batteries

News feed of science and technology, new electronics

 

Interesting materials of the Free Technical Library:

▪ site section Digital technology. Article selection

▪ article It's too early for us to die - we still have things to do at home. Popular expression

▪ article How did people sew in ancient times? Detailed answer

▪ article Feeder driver. Standard instruction on labor protection

▪ article Microbubble bath for etching printed circuit boards. Encyclopedia of radio electronics and electrical engineering

▪ article Electron-optical converters. Encyclopedia of radio electronics and electrical engineering


All languages ​​of this page

Home page | Library | Articles | Website map | Site Reviews

www.diagram.com.ua

www.diagram.com.ua
2000-2024