Was there discrimination based on hair color? Detailed answer

Free technical library

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

Was there discrimination based on hair color? Detailed answer

Big encyclopedia for children and adults

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

Comments on the article

Did you know?

Was there discrimination based on hair color?

Peter the Great, by his decree, forbade redheads to hold public office.

Author: Mendeleev V.A.

Random interesting fact from the Great Encyclopedia:

Which people invented insect bombs?

Maya warriors used nests of hornets and wasps placed in gourds as throwing weapons. Being successfully thrown, the insects created panic in the ranks of the enemy.

Test your knowledge! Did you know...

▪ Who are Quakers?

▪ Where and when were nuclear explosions used for peaceful economic purposes?

▪ What fires were extinguished in ancient times with milk?

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

Thermal masking for electronics 11.04.2012

A group of French scientists have proposed a new approach to creating invisibility in the infrared range. Thermal cloaking works on the same principles as optical cloaking, and in the future will allow the development of new methods of heat removal in electronics, opening up new possibilities in the design of spacecraft and military equipment.

The latest advances in optical invisibility are based on metamaterials that bend light and make objects invisible. Scientists from Aix-Marseille University and the CRNS National Center have proven that the same approach can be applied to thermal camouflage. Although the new technology uses the basic theories applied to optical invisibility, it has one key difference. So far, cloaking research has only focused on wave trajectory manipulation. These include electromagnetic (light), sound, seismic and hydrodynamic waves. In turn, French scientists use thermal diffusion for thermal masking (transfer of components of gas mixtures or solutions under the influence of a temperature gradient).

Heat is not a wave, and it cannot travel long distances. In a two-dimensional model, the scientists directed heat flows from the hot zone of the object to the cool zone through the region between isotherms (concentric diffusion rings). The researchers then changed the geometry of the isotherms and forced the heat flow to bypass the circular area to the right of the heat source. Thus, it is possible to protect the object from heating or vice versa to concentrate a large amount of heat in a small volume. The ability to protect a specific area from heat is very attractive to electronics manufacturers. With the new technology, it is possible to prevent overheating of nanoelectronic and microelectronic devices, which are very difficult to cool with conventional methods.

Currently, French scientists are working on the creation of prototypes of thermal masking for microelectronics, the first samples will be ready within the next few months.

Other interesting news:

▪ Cooling material based on camel fur

▪ Bottle of wine in a proton accelerator

▪ Photons instead of electrons for revolutionary processors

▪ Innovative lidar Velodyne VLS-128

▪ Aluminum film protects against forest fires

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ site section Computer devices. Article selection

▪ article Rotochute class S9N. Tips for a modeller

▪ article Which cities in the world are among the top ten rainiest? Detailed answer

▪ article Chief Project Engineer. Job description

▪ article Four-level economical probe. Encyclopedia of radio electronics and electrical engineering

▪ article Temperature stabilizer tip of a household soldering iron. Encyclopedia of radio electronics and electrical engineering

Leave your comment on this article:

All languages of this page

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