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 do the letters ISDN stand for? 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 do the letters ISDN stand for?

This is an abbreviation of the English name Integrated Services Digital Network (long-distance digital network). It enables the simultaneous transmission of telephone conversations, telefax and other information in digital form over a single cable with high quality selection and high speed.

The system was proposed in the USA in 1989.

Author: Mendeleev V.A.

 Random interesting fact from the Great Encyclopedia:

What is batik?

The technique of obtaining multi-colored fabric is called batik. Each product made in this technique is unique.

 Test your knowledge! Did you know...

▪ What property of Iapetus, the moon of Saturn, became one of the foundations of Arthur C. Clarke's famous novel "2001: A Space Odyssey"?

▪ Who discovered atoms?

▪ Why do boa constrictors die?

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:

A New Way to Control and Manipulate Optical Signals 05.05.2024

The modern world of science and technology is developing rapidly, and every day new methods and technologies appear that open up new prospects for us in various fields. One such innovation is the development by German scientists of a new way to control optical signals, which could lead to significant progress in the field of photonics. Recent research has allowed German scientists to create a tunable waveplate inside a fused silica waveguide. This method, based on the use of a liquid crystal layer, allows one to effectively change the polarization of light passing through a waveguide. This technological breakthrough opens up new prospects for the development of compact and efficient photonic devices capable of processing large volumes of data. The electro-optical control of polarization provided by the new method could provide the basis for a new class of integrated photonic devices. This opens up great opportunities for ... >>

Primium Seneca keyboard 05.05.2024

Keyboards are an integral part of our daily computer work. However, one of the main problems that users face is noise, especially in the case of premium models. But with the new Seneca keyboard from Norbauer & Co, that may change. Seneca is not just a keyboard, it is the result of five years of development work to create the ideal device. Every aspect of this keyboard, from acoustic properties to mechanical characteristics, has been carefully considered and balanced. One of the key features of Seneca is its silent stabilizers, which solve the noise problem common to many keyboards. In addition, the keyboard supports various key widths, making it convenient for any user. Although Seneca is not yet available for purchase, it is scheduled for release in late summer. Norbauer & Co's Seneca represents new standards in keyboard design. Her ... >>

The world's tallest astronomical observatory opened 04.05.2024

Exploring space and its mysteries is a task that attracts the attention of astronomers from all over the world. In the fresh air of the high mountains, far from city light pollution, the stars and planets reveal their secrets with greater clarity. A new page is opening in the history of astronomy with the opening of the world's highest astronomical observatory - the Atacama Observatory of the University of Tokyo. The Atacama Observatory, located at an altitude of 5640 meters above sea level, opens up new opportunities for astronomers in the study of space. This site has become the highest location for a ground-based telescope, providing researchers with a unique tool for studying infrared waves in the Universe. Although the high altitude location provides clearer skies and less interference from the atmosphere, building an observatory on a high mountain poses enormous difficulties and challenges. However, despite the difficulties, the new observatory opens up broad research prospects for astronomers. ... >>

Random news from the Archive

Smart planter PAU 15.10.2022

A smart planter developed by the Punjab Agricultural University (PAU) in India is included in a centrally sponsored subsidy scheme by the Union Ministry of Agriculture and Farmers Welfare.

Wheat planted in a paddy field with the PAU smart planter matures earlier than with the Happy and Super Seed planters. She can work with a tractor with a power of 45 to 50 horsepower and sow wheat on 10-12 acres per day. The machine gives the proper space for the seeds to germinate and grow in good soil conditions.

To commercialize its smart planter, Punjab Agricultural University has signed a memorandum of agreement with at least 10 agricultural equipment manufacturers. The application process for the PAU smart planter subsidy will be announced by the Punjab Ministry of Agriculture.

In the 2021-22 wheat planting season, it has been successfully demonstrated on 580 acres for planting wheat in leftover honeydew in farmers' fields.

Dr. Jaswinder Singh Brar, plant protection officer, said that wheat sown with the smart planter grows healthy and yields well compared to fields sown after burning padi straw.

Other interesting news:

▪ Jeans sewing robots

▪ Microbes and nuggets

▪ New color sensor type HDJD-S722-QR999

▪ New Toshiba Robot Vacuum Cleaners

▪ Supersonic train project

News feed of science and technology, new electronics

 

Interesting materials of the Free Technical Library:

▪ section of the site Tips for radio amateurs. Selection of articles

▪ article Applied to meanness. Popular expression

▪ article What is a business? Detailed answer

▪ article Forwarding driver. Job description

▪ article What is and where to use 1P, 1P+N, 2P, 3P, 4P. Encyclopedia of radio electronics and electrical engineering

▪ article Low-power bipolar stabilizer, 220 volts 200 milliamps. 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