Free books, magazines, collections published in 1986

Free technical library

FREE TECH LIBRARY
Content of books and magazines / Year 1986

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I All-Union Olympiad in Physics for Students of Secondary Vocational Schools

IX tournament of young physicists

VIII tournament of young physicists

XII All-Russian Olympiad for schoolchildren

XVII International Physics Olympiad

XX All-Union Olympiad in Mathematics

XX All-Union Physics Olympiad

XXVII International Mathematical Olympiad

What will happen if...?

Automation of monopulse signal shape control. Ryzhevsky A.G., 1986

Automatic telegraph key with adjustable dash duration

Automatic photo exposure meter

Automatic restart. Ovchinnikov V.V., 1986

Automatic battery charger and recovery device

Active RC filters

Active probes with low input capacitance

Alice testifies

DCV Antenna

Multi-channel communication equipment for VL SVN. Ishkin V.Kh., 1986

Asynchronous electric motors. Arkhiptsev Yu.F., 1986

Atomic physics in problems

Running lights with advanced features

Binary Algorithm

Air circuit breakers with air-filled separators. Usenko A.F., 1986

Wolf, Baron and Newton. (About the film Nu, you wait!, the novel by Cyrano de Bergerac and laser fusion)

Restore the erased figure!

Auxiliary Cube

Sundries

Second cosmic velocity, magnetic moment of current, about nuclear matter

Van Romen's Challenge

Population genetics and geometry

Geometric transformations in planimetric problems

Geometric derivation of the sum cosine formula

20 m heterodyne receiver

Cities for electrons

Pressure, volume, temperature

Push-Pull LF Amplifier

Knowledge Day is a national holiday

Ten-command radio control equipment for models

Dominique Francois Arago

Once again about a spoon in a stream of water

Joseph Louis Lagrange. (To the 250th anniversary of the birth)

Etruscan riddle

Problems of the XLIX Moscow City Mathematical Olympiad

Tasks of the Leningrad City Physics Olympiad

Problems M1001-1005, F1013-1017 and solving problems M981-985, F993-997

Problems M1006-1010, F1018-1022 and solving problems M986-990, F998-1002

Problems M1011-1015, F1023-1027 and solving problems M991-995, F1003-1007

Problems M1016-1020, F1028-1032 and solving problems M996-1000, F1008-1012

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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

Magnetic bracelets don't work 05.09.2006

According to the British Medical Journal, magnetic bracelets are ineffective - at least not for relieving arthritis.

If a small positive effect exists, it is only because of suggestion and self-hypnosis. The authors of the study indicate that if magnetic fields affected a person, then some changes would be noted in patients exposed to strong magnetic fields when examined on a nuclear magnetic tomograph.

Meanwhile, "treatment" with a magnetic bracelet distracts the patient from effective methods and makes him waste time.

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ section of the site Consumer Electronics. Selection of articles

▪ article by Grace Hopper. Famous aphorisms

▪ article What connects Diogenes' barrel and Pandora's box? Detailed answer

▪ article The simplest sailing boat. Personal transport

▪ article Spiral GP for low bands. Encyclopedia of radio electronics and electrical engineering

▪ article Tank and cassette for burning cigarettes. Focus secret

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