Free books, magazines, collections published in 1981

Free technical library

FREE TECH LIBRARY
Content of books and magazines / Year 1981

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10th anniversary of the summer PMS in Belarus

VII All-Russian gathering of young innovators and designers

XII International Physics Olympiad

XV All-Union Olympiad in Mathematics

XXII International Mathematical Olympiad

Automation of the synthesis of functional circuits. On the example of adders with group transfer. Potemkin I.S., 1981

Automatic parametric optimization of control systems. Kostyuk V.I., Shirokov L.A., 1981

Power units for electrostatic precipitators. Aliev G.M.-A. agly, 1981

Algebra without numbers. (L.A. Kaluzhnin and V.I. Sushchansky, Transformations and permutations)

Amoeba... in a jacket

Analog integrated circuits. Directory. Kudryashov B.P., 1981

Databanks. The use of electronic computing technology. Chaumier J., 1981

Infinite sums and... a rectangle

Contactless ignition system

Billiards

High reliability electronic ignition unit

Botvinnik loses and... wins

Get ready for new living conditions

In the magical world of numbers

To the philatelic collection

At the intersection - one point

To help the radio club. Ivanov B.S., 1981

What is it?

Fun mosaic by Sam Loyd. (S. Loyd, Mathematical Mosaic)

During the heyday of our Motherland

All-Russian Olympiad for schoolchildren

Auxiliary segments and angles

The output optical device of the color and music installation

Test Signal Generator for Adjusting Color TVs (optional)

Henry Cavendish

Geometric analogies

Geometric proofs of mean theorems

Geometric problems of our readers

Push-Pull Transistor Power Amplifier

Ten Derivative Problems

James Clerk Maxwell (on his 150th birthday)

state diagram

Range 160 m in transceiver

think and search

ES COMPUTER - a family of universal computers

More about Pythagorean triplets

liquid crystals

The task is the same - to learn!

Dirac problem

Task for research

[1] [2] [3] [4] [5] [6]

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Latest news of science and technology, new electronics:

Artificial leather for touch emulation 15.04.2024

In a modern technology world where distance is becoming increasingly commonplace, maintaining connection and a sense of closeness is important. Recent developments in artificial skin by German scientists from Saarland University represent a new era in virtual interactions. German researchers from Saarland University have developed ultra-thin films that can transmit the sensation of touch over a distance. This cutting-edge technology provides new opportunities for virtual communication, especially for those who find themselves far from their loved ones. The ultra-thin films developed by the researchers, just 50 micrometers thick, can be integrated into textiles and worn like a second skin. These films act as sensors that recognize tactile signals from mom or dad, and as actuators that transmit these movements to the baby. Parents' touch to the fabric activates sensors that react to pressure and deform the ultra-thin film. This ... >>

Petgugu Global cat litter 15.04.2024

Taking care of pets can often be a challenge, especially when it comes to keeping your home clean. A new interesting solution from the Petgugu Global startup has been presented, which will make life easier for cat owners and help them keep their home perfectly clean and tidy. Startup Petgugu Global has unveiled a unique cat toilet that can automatically flush feces, keeping your home clean and fresh. This innovative device is equipped with various smart sensors that monitor your pet's toilet activity and activate to automatically clean after use. The device connects to the sewer system and ensures efficient waste removal without the need for intervention from the owner. Additionally, the toilet has a large flushable storage capacity, making it ideal for multi-cat households. The Petgugu cat litter bowl is designed for use with water-soluble litters and offers a range of additional ... >>

The attractiveness of caring men 14.04.2024

The stereotype that women prefer "bad boys" has long been widespread. However, recent research conducted by British scientists from Monash University offers a new perspective on this issue. They looked at how women responded to men's emotional responsibility and willingness to help others. The study's findings could change our understanding of what makes men attractive to women. A study conducted by scientists from Monash University leads to new findings about men's attractiveness to women. In the experiment, women were shown photographs of men with brief stories about their behavior in various situations, including their reaction to an encounter with a homeless person. Some of the men ignored the homeless man, while others helped him, such as buying him food. A study found that men who showed empathy and kindness were more attractive to women compared to men who showed empathy and kindness. ... >>

Random news from the Archive

SEAGATE hard drives in TOSHIBA video recorders 18.09.2003

Seagate Technology announced that Toshiba, the largest player in the consumer electronics market, has selected Seagate Consumer Electronics hard drives for its RD-XS31 HDD&DVD recorder.

This is the industry's first DVD multi-drive video recorder. This Seagate hard drive will allow the RD-XS31 to record up to 104 hours of video. In addition, the HDD can be used as a buffer for later distillation of video to DVD-RAM, DVD-RW or DVD-R discs.

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ site section And then an inventor (TRIZ) appeared. Article selection

▪ an article by Leeuwenhoek Anthony van. Biography of a scientist

▪ article When was food frozen for the first time? Detailed answer

▪ article The functional composition of Atec TVs. Directory

▪ article Caller ID-prefix to the computer Electronic secretary. Encyclopedia of radio electronics and electrical engineering

▪ article Pocket stereo amplifier. Encyclopedia of radio electronics and electrical engineering

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