Menu English Ukrainian russian Home

Free technical library for hobbyists and professionals Free technical library


BIG ENCYCLOPEDIA FOR CHILDREN AND ADULTS
Free library / Directory / Big encyclopedia for children and adults

What lie detectors were used by the ancient Chinese and Arabs? Detailed answer

Big encyclopedia for children and adults

Directory / Big encyclopedia. Questions for quiz and self-education

Comments on the article Comments on the article

Did you know?

What lie detectors were used by the ancient Chinese and Arabs?

Even in ancient times, different peoples used the principles that are used in the modern lie detector to determine the guilt of the suspect. The Chinese made people put a handful of rice in their mouth and then spit it out. Arabs forced to lick a red-hot blade. If the rice was dry or the suspect received a burn from the blade, it means that before that his mouth was dry, which indicated guilt.

Authors: Jimmy Wales, Larry Sanger

 Random interesting fact from the Great Encyclopedia:

Why does tickling cause laughter?

When tickled, a spasm of the rib muscles occurs. They begin to shrink involuntarily, which makes it seem that the person is laughing.

 Test your knowledge! Did you know...

▪ What is radioactive fallout?

▪ Why is there no life on the moon?

▪ Why do cats and other animals carry babies with their teeth by the withers?

See other articles Section Big encyclopedia. Questions for quiz and self-education.

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

Machine for thinning flowers in gardens 02.05.2024

In modern agriculture, technological progress is developing aimed at increasing the efficiency of plant care processes. The innovative Florix flower thinning machine was presented in Italy, designed to optimize the harvesting stage. This tool is equipped with mobile arms, allowing it to be easily adapted to the needs of the garden. The operator can adjust the speed of the thin wires by controlling them from the tractor cab using a joystick. This approach significantly increases the efficiency of the flower thinning process, providing the possibility of individual adjustment to the specific conditions of the garden, as well as the variety and type of fruit grown in it. After testing the Florix machine for two years on various types of fruit, the results were very encouraging. Farmers such as Filiberto Montanari, who has used a Florix machine for several years, have reported a significant reduction in the time and labor required to thin flowers. ... >>

Advanced Infrared Microscope 02.05.2024

Microscopes play an important role in scientific research, allowing scientists to delve into structures and processes invisible to the eye. However, various microscopy methods have their limitations, and among them was the limitation of resolution when using the infrared range. But the latest achievements of Japanese researchers from the University of Tokyo open up new prospects for studying the microworld. Scientists from the University of Tokyo have unveiled a new microscope that will revolutionize the capabilities of infrared microscopy. This advanced instrument allows you to see the internal structures of living bacteria with amazing clarity on the nanometer scale. Typically, mid-infrared microscopes are limited by low resolution, but the latest development from Japanese researchers overcomes these limitations. According to scientists, the developed microscope allows creating images with a resolution of up to 120 nanometers, which is 30 times higher than the resolution of traditional microscopes. ... >>

Air trap for insects 01.05.2024

Agriculture is one of the key sectors of the economy, and pest control is an integral part of this process. A team of scientists from the Indian Council of Agricultural Research-Central Potato Research Institute (ICAR-CPRI), Shimla, has come up with an innovative solution to this problem - a wind-powered insect air trap. This device addresses the shortcomings of traditional pest control methods by providing real-time insect population data. The trap is powered entirely by wind energy, making it an environmentally friendly solution that requires no power. Its unique design allows monitoring of both harmful and beneficial insects, providing a complete overview of the population in any agricultural area. “By assessing target pests at the right time, we can take necessary measures to control both pests and diseases,” says Kapil ... >>

Random news from the Archive

LED SOLERIQ S 13 OSRAM Opto Semiconductors 27.08.2013

The Soleriq high power LED family from OSRAM Opto Semiconductors has been expanded with a new product: the Soleriq S 13 is a high-brightness LED with a light emitting surface diameter of 13,5 mm and is available in all color temperatures. The new LED is used in lighting systems that meet the highest requirements for lighting quality. Soleriq S 13 replaces high power halogen lamps in LED luminaires and room lighting in hotels, restaurants and shops.

Soleriq S 13 creates an exceptional opportunity for building lighting systems, especially in the professional sector of lighting systems, thanks to its brightness of 1500 lm and a light emitting surface with a diameter of 13,5 mm. They are installed in LED fixtures or lamps instead of high power halogen lamps. "Soleriq S 13 is designed for both professional and home lighting applications because it covers all color temperatures along with high brightness. In addition, the color rendering index of this LED for all color temperatures exceeds 80. As a result, Soleriq S 13 greatly expands the scope of the Soleriq LED family, since the previously introduced E 30 and E 45 diodes of this family were only for ceiling luminaires," explains Andreas Vogler, Marketing Manager of the General Lighting Systems Department, who is responsible at Osram Opto Semiconductors for the Soleriq LED family.

Like the E 30 and E 45 LEDs, the Soleriq S 13 greatly simplifies the design of the luminaire, since due to its exceptional brightness, only one component, instead of several, needs to be installed in the luminaire. The crystals in the diode are very densely packed and they are all under a common phosphor layer (chip-on-board), which creates the impression of a uniform light-emitting surface, and also provides a uniform color and uniform light distribution. In order to further improve the uniformity of light, the crystals are arranged in a circle. This greatly simplifies the matching of LEDs with secondary optics. The light generated in such a device can be used with much lower optical losses, which, in turn, increases the efficiency of LED lamps and fixtures. The typical advantages of LED light sources, such as high energy efficiency, long service life and low operating costs, also apply to ceiling luminaires using Soleriq S 13.

The new powerful light sources are quite easy to work with. Unlike other commercially available high power LEDs, Soleriq S 13 does not require soldering to mount; You can mount these LEDs with glue, screws or a connector. Of course, ordinary soldering can also be used to connect the wires, followed by mounting with glue or screw fastening on a radiator. However, a much simpler way is to use a connector that provides both electrical contact and mechanical fastening of the LED. This eliminates the need for soldering; you just need to insert the connecting wires into the spring contacts of the connector.

Other interesting news:

▪ Ultra-fast eMMC Pro Class 1500 memory modules from Samsung

▪ Universal wireless charger from Samsung

▪ New time setting chip

▪ Brain training leads to the formation of new nerve cells

▪ Battery powered by human saliva

News feed of science and technology, new electronics

 

Interesting materials of the Free Technical Library:

▪ section of the site Your stories. Article selection

▪ article Mortal sin. Popular expression

▪ article What do chameleons do? Detailed answer

▪ article Chubushnik Caucasian. Legends, cultivation, methods of application

▪ article Communication on IRDA for computer. Encyclopedia of radio electronics and electrical engineering

▪ article Laboratory transformer control unit. Encyclopedia of radio electronics and electrical engineering

Leave your comment on this article:

Name:


Email (optional):


A comment:





All languages ​​of this page

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

www.diagram.com.ua

www.diagram.com.ua
2000-2024